1mod ignore;
   2mod lsp_command;
   3pub mod project_settings;
   4pub mod search;
   5pub mod terminals;
   6pub mod worktree;
   7
   8#[cfg(test)]
   9mod project_tests;
  10#[cfg(test)]
  11mod worktree_tests;
  12
  13use anyhow::{anyhow, Context as _, Result};
  14use client::{proto, Client, Collaborator, TypedEnvelope, UserStore};
  15use clock::ReplicaId;
  16use collections::{hash_map, BTreeMap, HashMap, HashSet};
  17use copilot::Copilot;
  18use futures::{
  19    channel::{
  20        mpsc::{self, UnboundedReceiver},
  21        oneshot,
  22    },
  23    future::{self, try_join_all, Shared},
  24    stream::FuturesUnordered,
  25    AsyncWriteExt, Future, FutureExt, StreamExt, TryFutureExt,
  26};
  27use globset::{Glob, GlobSet, GlobSetBuilder};
  28use gpui::{
  29    AnyModel, AppContext, AsyncAppContext, BackgroundExecutor, Context, Entity, EventEmitter,
  30    Model, ModelContext, Task, WeakModel,
  31};
  32use itertools::Itertools;
  33use language::{
  34    language_settings::{
  35        language_settings, FormatOnSave, Formatter, InlayHintKind, LanguageSettings,
  36    },
  37    point_to_lsp,
  38    proto::{
  39        deserialize_anchor, deserialize_fingerprint, deserialize_line_ending, deserialize_version,
  40        serialize_anchor, serialize_version, split_operations,
  41    },
  42    range_from_lsp, range_to_lsp, Bias, Buffer, BufferSnapshot, CachedLspAdapter, CodeAction,
  43    CodeLabel, Completion, Diagnostic, DiagnosticEntry, DiagnosticSet, Diff, Event as BufferEvent,
  44    File as _, Language, LanguageRegistry, LanguageServerName, LocalFile, LspAdapterDelegate,
  45    OffsetRangeExt, Operation, Patch, PendingLanguageServer, PointUtf16, TextBufferSnapshot,
  46    ToOffset, ToPointUtf16, Transaction, Unclipped,
  47};
  48use log::error;
  49use lsp::{
  50    DiagnosticSeverity, DiagnosticTag, DidChangeWatchedFilesRegistrationOptions,
  51    DocumentHighlightKind, LanguageServer, LanguageServerBinary, LanguageServerId, OneOf,
  52};
  53use lsp_command::*;
  54use node_runtime::NodeRuntime;
  55use parking_lot::Mutex;
  56use postage::watch;
  57use prettier::{LocateStart, Prettier};
  58use project_settings::{LspSettings, ProjectSettings};
  59use rand::prelude::*;
  60use search::SearchQuery;
  61use serde::Serialize;
  62use settings::{Settings, SettingsStore};
  63use sha2::{Digest, Sha256};
  64use similar::{ChangeTag, TextDiff};
  65use smol::channel::{Receiver, Sender};
  66use std::{
  67    cmp::{self, Ordering},
  68    convert::TryInto,
  69    hash::Hash,
  70    mem,
  71    num::NonZeroU32,
  72    ops::Range,
  73    path::{self, Component, Path, PathBuf},
  74    process::Stdio,
  75    str,
  76    sync::{
  77        atomic::{AtomicUsize, Ordering::SeqCst},
  78        Arc,
  79    },
  80    time::{Duration, Instant},
  81};
  82use terminals::Terminals;
  83use text::Anchor;
  84use util::{
  85    debug_panic, defer, http::HttpClient, merge_json_value_into,
  86    paths::LOCAL_SETTINGS_RELATIVE_PATH, post_inc, ResultExt, TryFutureExt as _,
  87};
  88
  89pub use fs::*;
  90#[cfg(any(test, feature = "test-support"))]
  91pub use prettier::FORMAT_SUFFIX as TEST_PRETTIER_FORMAT_SUFFIX;
  92pub use worktree::*;
  93
  94const MAX_SERVER_REINSTALL_ATTEMPT_COUNT: u64 = 4;
  95
  96pub trait Item {
  97    fn entry_id(&self, cx: &AppContext) -> Option<ProjectEntryId>;
  98    fn project_path(&self, cx: &AppContext) -> Option<ProjectPath>;
  99}
 100
 101// Language server state is stored across 3 collections:
 102//     language_servers =>
 103//         a mapping from unique server id to LanguageServerState which can either be a task for a
 104//         server in the process of starting, or a running server with adapter and language server arcs
 105//     language_server_ids => a mapping from worktreeId and server name to the unique server id
 106//     language_server_statuses => a mapping from unique server id to the current server status
 107//
 108// Multiple worktrees can map to the same language server for example when you jump to the definition
 109// of a file in the standard library. So language_server_ids is used to look up which server is active
 110// for a given worktree and language server name
 111//
 112// When starting a language server, first the id map is checked to make sure a server isn't already available
 113// for that worktree. If there is one, it finishes early. Otherwise, a new id is allocated and and
 114// the Starting variant of LanguageServerState is stored in the language_servers map.
 115pub struct Project {
 116    worktrees: Vec<WorktreeHandle>,
 117    active_entry: Option<ProjectEntryId>,
 118    buffer_ordered_messages_tx: mpsc::UnboundedSender<BufferOrderedMessage>,
 119    languages: Arc<LanguageRegistry>,
 120    supplementary_language_servers:
 121        HashMap<LanguageServerId, (LanguageServerName, Arc<LanguageServer>)>,
 122    language_servers: HashMap<LanguageServerId, LanguageServerState>,
 123    language_server_ids: HashMap<(WorktreeId, LanguageServerName), LanguageServerId>,
 124    language_server_statuses: BTreeMap<LanguageServerId, LanguageServerStatus>,
 125    last_workspace_edits_by_language_server: HashMap<LanguageServerId, ProjectTransaction>,
 126    client: Arc<client::Client>,
 127    next_entry_id: Arc<AtomicUsize>,
 128    join_project_response_message_id: u32,
 129    next_diagnostic_group_id: usize,
 130    user_store: Model<UserStore>,
 131    fs: Arc<dyn Fs>,
 132    client_state: Option<ProjectClientState>,
 133    collaborators: HashMap<proto::PeerId, Collaborator>,
 134    client_subscriptions: Vec<client::Subscription>,
 135    _subscriptions: Vec<gpui::Subscription>,
 136    next_buffer_id: u64,
 137    opened_buffer: (watch::Sender<()>, watch::Receiver<()>),
 138    shared_buffers: HashMap<proto::PeerId, HashSet<u64>>,
 139    #[allow(clippy::type_complexity)]
 140    loading_buffers_by_path: HashMap<
 141        ProjectPath,
 142        postage::watch::Receiver<Option<Result<Model<Buffer>, Arc<anyhow::Error>>>>,
 143    >,
 144    #[allow(clippy::type_complexity)]
 145    loading_local_worktrees:
 146        HashMap<Arc<Path>, Shared<Task<Result<Model<Worktree>, Arc<anyhow::Error>>>>>,
 147    opened_buffers: HashMap<u64, OpenBuffer>,
 148    local_buffer_ids_by_path: HashMap<ProjectPath, u64>,
 149    local_buffer_ids_by_entry_id: HashMap<ProjectEntryId, u64>,
 150    /// A mapping from a buffer ID to None means that we've started waiting for an ID but haven't finished loading it.
 151    /// Used for re-issuing buffer requests when peers temporarily disconnect
 152    incomplete_remote_buffers: HashMap<u64, Option<Model<Buffer>>>,
 153    buffer_snapshots: HashMap<u64, HashMap<LanguageServerId, Vec<LspBufferSnapshot>>>, // buffer_id -> server_id -> vec of snapshots
 154    buffers_being_formatted: HashSet<u64>,
 155    buffers_needing_diff: HashSet<WeakModel<Buffer>>,
 156    git_diff_debouncer: DelayedDebounced,
 157    nonce: u128,
 158    _maintain_buffer_languages: Task<()>,
 159    _maintain_workspace_config: Task<Result<()>>,
 160    terminals: Terminals,
 161    copilot_lsp_subscription: Option<gpui::Subscription>,
 162    copilot_log_subscription: Option<lsp::Subscription>,
 163    current_lsp_settings: HashMap<Arc<str>, LspSettings>,
 164    node: Option<Arc<dyn NodeRuntime>>,
 165    #[cfg(not(any(test, feature = "test-support")))]
 166    default_prettier: Option<DefaultPrettier>,
 167    prettier_instances: HashMap<
 168        (Option<WorktreeId>, PathBuf),
 169        Shared<Task<Result<Arc<Prettier>, Arc<anyhow::Error>>>>,
 170    >,
 171}
 172
 173#[cfg(not(any(test, feature = "test-support")))]
 174struct DefaultPrettier {
 175    installation_process: Option<Shared<Task<()>>>,
 176    installed_plugins: HashSet<&'static str>,
 177}
 178
 179struct DelayedDebounced {
 180    task: Option<Task<()>>,
 181    cancel_channel: Option<oneshot::Sender<()>>,
 182}
 183
 184enum LanguageServerToQuery {
 185    Primary,
 186    Other(LanguageServerId),
 187}
 188
 189impl DelayedDebounced {
 190    fn new() -> DelayedDebounced {
 191        DelayedDebounced {
 192            task: None,
 193            cancel_channel: None,
 194        }
 195    }
 196
 197    fn fire_new<F>(&mut self, delay: Duration, cx: &mut ModelContext<Project>, func: F)
 198    where
 199        F: 'static + Send + FnOnce(&mut Project, &mut ModelContext<Project>) -> Task<()>,
 200    {
 201        if let Some(channel) = self.cancel_channel.take() {
 202            _ = channel.send(());
 203        }
 204
 205        let (sender, mut receiver) = oneshot::channel::<()>();
 206        self.cancel_channel = Some(sender);
 207
 208        let previous_task = self.task.take();
 209        self.task = Some(cx.spawn(move |project, mut cx| async move {
 210            let mut timer = cx.background_executor().timer(delay).fuse();
 211            if let Some(previous_task) = previous_task {
 212                previous_task.await;
 213            }
 214
 215            futures::select_biased! {
 216                _ = receiver => return,
 217                    _ = timer => {}
 218            }
 219
 220            if let Ok(task) = project.update(&mut cx, |project, cx| (func)(project, cx)) {
 221                task.await;
 222            }
 223        }));
 224    }
 225}
 226
 227struct LspBufferSnapshot {
 228    version: i32,
 229    snapshot: TextBufferSnapshot,
 230}
 231
 232/// Message ordered with respect to buffer operations
 233enum BufferOrderedMessage {
 234    Operation {
 235        buffer_id: u64,
 236        operation: proto::Operation,
 237    },
 238    LanguageServerUpdate {
 239        language_server_id: LanguageServerId,
 240        message: proto::update_language_server::Variant,
 241    },
 242    Resync,
 243}
 244
 245enum LocalProjectUpdate {
 246    WorktreesChanged,
 247    CreateBufferForPeer {
 248        peer_id: proto::PeerId,
 249        buffer_id: u64,
 250    },
 251}
 252
 253enum OpenBuffer {
 254    Strong(Model<Buffer>),
 255    Weak(WeakModel<Buffer>),
 256    Operations(Vec<Operation>),
 257}
 258
 259#[derive(Clone)]
 260enum WorktreeHandle {
 261    Strong(Model<Worktree>),
 262    Weak(WeakModel<Worktree>),
 263}
 264
 265enum ProjectClientState {
 266    Local {
 267        remote_id: u64,
 268        updates_tx: mpsc::UnboundedSender<LocalProjectUpdate>,
 269        _send_updates: Task<Result<()>>,
 270    },
 271    Remote {
 272        sharing_has_stopped: bool,
 273        remote_id: u64,
 274        replica_id: ReplicaId,
 275    },
 276}
 277
 278#[derive(Clone, Debug, PartialEq)]
 279pub enum Event {
 280    LanguageServerAdded(LanguageServerId),
 281    LanguageServerRemoved(LanguageServerId),
 282    LanguageServerLog(LanguageServerId, String),
 283    Notification(String),
 284    ActiveEntryChanged(Option<ProjectEntryId>),
 285    ActivateProjectPanel,
 286    WorktreeAdded,
 287    WorktreeRemoved(WorktreeId),
 288    WorktreeUpdatedEntries(WorktreeId, UpdatedEntriesSet),
 289    DiskBasedDiagnosticsStarted {
 290        language_server_id: LanguageServerId,
 291    },
 292    DiskBasedDiagnosticsFinished {
 293        language_server_id: LanguageServerId,
 294    },
 295    DiagnosticsUpdated {
 296        path: ProjectPath,
 297        language_server_id: LanguageServerId,
 298    },
 299    RemoteIdChanged(Option<u64>),
 300    DisconnectedFromHost,
 301    Closed,
 302    DeletedEntry(ProjectEntryId),
 303    CollaboratorUpdated {
 304        old_peer_id: proto::PeerId,
 305        new_peer_id: proto::PeerId,
 306    },
 307    CollaboratorJoined(proto::PeerId),
 308    CollaboratorLeft(proto::PeerId),
 309    RefreshInlayHints,
 310}
 311
 312pub enum LanguageServerState {
 313    Starting(Task<Option<Arc<LanguageServer>>>),
 314
 315    Running {
 316        language: Arc<Language>,
 317        adapter: Arc<CachedLspAdapter>,
 318        server: Arc<LanguageServer>,
 319        watched_paths: HashMap<WorktreeId, GlobSet>,
 320        simulate_disk_based_diagnostics_completion: Option<Task<()>>,
 321    },
 322}
 323
 324#[derive(Serialize)]
 325pub struct LanguageServerStatus {
 326    pub name: String,
 327    pub pending_work: BTreeMap<String, LanguageServerProgress>,
 328    pub has_pending_diagnostic_updates: bool,
 329    progress_tokens: HashSet<String>,
 330}
 331
 332#[derive(Clone, Debug, Serialize)]
 333pub struct LanguageServerProgress {
 334    pub message: Option<String>,
 335    pub percentage: Option<usize>,
 336    #[serde(skip_serializing)]
 337    pub last_update_at: Instant,
 338}
 339
 340#[derive(Clone, Debug, Eq, PartialEq, Hash, PartialOrd, Ord)]
 341pub struct ProjectPath {
 342    pub worktree_id: WorktreeId,
 343    pub path: Arc<Path>,
 344}
 345
 346#[derive(Copy, Clone, Debug, Default, PartialEq, Serialize)]
 347pub struct DiagnosticSummary {
 348    pub error_count: usize,
 349    pub warning_count: usize,
 350}
 351
 352#[derive(Debug, Clone, PartialEq, Eq, Hash)]
 353pub struct Location {
 354    pub buffer: Model<Buffer>,
 355    pub range: Range<language::Anchor>,
 356}
 357
 358#[derive(Debug, Clone, PartialEq, Eq)]
 359pub struct InlayHint {
 360    pub position: language::Anchor,
 361    pub label: InlayHintLabel,
 362    pub kind: Option<InlayHintKind>,
 363    pub padding_left: bool,
 364    pub padding_right: bool,
 365    pub tooltip: Option<InlayHintTooltip>,
 366    pub resolve_state: ResolveState,
 367}
 368
 369#[derive(Debug, Clone, PartialEq, Eq)]
 370pub enum ResolveState {
 371    Resolved,
 372    CanResolve(LanguageServerId, Option<lsp::LSPAny>),
 373    Resolving,
 374}
 375
 376impl InlayHint {
 377    pub fn text(&self) -> String {
 378        match &self.label {
 379            InlayHintLabel::String(s) => s.to_owned(),
 380            InlayHintLabel::LabelParts(parts) => parts.iter().map(|part| &part.value).join(""),
 381        }
 382    }
 383}
 384
 385#[derive(Debug, Clone, PartialEq, Eq)]
 386pub enum InlayHintLabel {
 387    String(String),
 388    LabelParts(Vec<InlayHintLabelPart>),
 389}
 390
 391#[derive(Debug, Clone, PartialEq, Eq)]
 392pub struct InlayHintLabelPart {
 393    pub value: String,
 394    pub tooltip: Option<InlayHintLabelPartTooltip>,
 395    pub location: Option<(LanguageServerId, lsp::Location)>,
 396}
 397
 398#[derive(Debug, Clone, PartialEq, Eq)]
 399pub enum InlayHintTooltip {
 400    String(String),
 401    MarkupContent(MarkupContent),
 402}
 403
 404#[derive(Debug, Clone, PartialEq, Eq)]
 405pub enum InlayHintLabelPartTooltip {
 406    String(String),
 407    MarkupContent(MarkupContent),
 408}
 409
 410#[derive(Debug, Clone, PartialEq, Eq)]
 411pub struct MarkupContent {
 412    pub kind: HoverBlockKind,
 413    pub value: String,
 414}
 415
 416#[derive(Debug, Clone)]
 417pub struct LocationLink {
 418    pub origin: Option<Location>,
 419    pub target: Location,
 420}
 421
 422#[derive(Debug)]
 423pub struct DocumentHighlight {
 424    pub range: Range<language::Anchor>,
 425    pub kind: DocumentHighlightKind,
 426}
 427
 428#[derive(Clone, Debug)]
 429pub struct Symbol {
 430    pub language_server_name: LanguageServerName,
 431    pub source_worktree_id: WorktreeId,
 432    pub path: ProjectPath,
 433    pub label: CodeLabel,
 434    pub name: String,
 435    pub kind: lsp::SymbolKind,
 436    pub range: Range<Unclipped<PointUtf16>>,
 437    pub signature: [u8; 32],
 438}
 439
 440#[derive(Clone, Debug, PartialEq)]
 441pub struct HoverBlock {
 442    pub text: String,
 443    pub kind: HoverBlockKind,
 444}
 445
 446#[derive(Clone, Debug, PartialEq, Eq)]
 447pub enum HoverBlockKind {
 448    PlainText,
 449    Markdown,
 450    Code { language: String },
 451}
 452
 453#[derive(Debug)]
 454pub struct Hover {
 455    pub contents: Vec<HoverBlock>,
 456    pub range: Option<Range<language::Anchor>>,
 457    pub language: Option<Arc<Language>>,
 458}
 459
 460impl Hover {
 461    pub fn is_empty(&self) -> bool {
 462        self.contents.iter().all(|block| block.text.is_empty())
 463    }
 464}
 465
 466#[derive(Default)]
 467pub struct ProjectTransaction(pub HashMap<Model<Buffer>, language::Transaction>);
 468
 469impl DiagnosticSummary {
 470    fn new<'a, T: 'a>(diagnostics: impl IntoIterator<Item = &'a DiagnosticEntry<T>>) -> Self {
 471        let mut this = Self {
 472            error_count: 0,
 473            warning_count: 0,
 474        };
 475
 476        for entry in diagnostics {
 477            if entry.diagnostic.is_primary {
 478                match entry.diagnostic.severity {
 479                    DiagnosticSeverity::ERROR => this.error_count += 1,
 480                    DiagnosticSeverity::WARNING => this.warning_count += 1,
 481                    _ => {}
 482                }
 483            }
 484        }
 485
 486        this
 487    }
 488
 489    pub fn is_empty(&self) -> bool {
 490        self.error_count == 0 && self.warning_count == 0
 491    }
 492
 493    pub fn to_proto(
 494        &self,
 495        language_server_id: LanguageServerId,
 496        path: &Path,
 497    ) -> proto::DiagnosticSummary {
 498        proto::DiagnosticSummary {
 499            path: path.to_string_lossy().to_string(),
 500            language_server_id: language_server_id.0 as u64,
 501            error_count: self.error_count as u32,
 502            warning_count: self.warning_count as u32,
 503        }
 504    }
 505}
 506
 507#[derive(Clone, Copy, Debug, Default, Hash, PartialEq, Eq, PartialOrd, Ord)]
 508pub struct ProjectEntryId(usize);
 509
 510impl ProjectEntryId {
 511    pub const MAX: Self = Self(usize::MAX);
 512
 513    pub fn new(counter: &AtomicUsize) -> Self {
 514        Self(counter.fetch_add(1, SeqCst))
 515    }
 516
 517    pub fn from_proto(id: u64) -> Self {
 518        Self(id as usize)
 519    }
 520
 521    pub fn to_proto(&self) -> u64 {
 522        self.0 as u64
 523    }
 524
 525    pub fn to_usize(&self) -> usize {
 526        self.0
 527    }
 528}
 529
 530#[derive(Debug, Clone, Copy, PartialEq, Eq)]
 531pub enum FormatTrigger {
 532    Save,
 533    Manual,
 534}
 535
 536struct ProjectLspAdapterDelegate {
 537    project: Model<Project>,
 538    http_client: Arc<dyn HttpClient>,
 539}
 540
 541impl FormatTrigger {
 542    fn from_proto(value: i32) -> FormatTrigger {
 543        match value {
 544            0 => FormatTrigger::Save,
 545            1 => FormatTrigger::Manual,
 546            _ => FormatTrigger::Save,
 547        }
 548    }
 549}
 550#[derive(Clone, Debug, PartialEq)]
 551enum SearchMatchCandidate {
 552    OpenBuffer {
 553        buffer: Model<Buffer>,
 554        // This might be an unnamed file without representation on filesystem
 555        path: Option<Arc<Path>>,
 556    },
 557    Path {
 558        worktree_id: WorktreeId,
 559        path: Arc<Path>,
 560    },
 561}
 562
 563type SearchMatchCandidateIndex = usize;
 564impl SearchMatchCandidate {
 565    fn path(&self) -> Option<Arc<Path>> {
 566        match self {
 567            SearchMatchCandidate::OpenBuffer { path, .. } => path.clone(),
 568            SearchMatchCandidate::Path { path, .. } => Some(path.clone()),
 569        }
 570    }
 571}
 572
 573impl Project {
 574    pub fn init_settings(cx: &mut AppContext) {
 575        ProjectSettings::register(cx);
 576    }
 577
 578    pub fn init(client: &Arc<Client>, cx: &mut AppContext) {
 579        Self::init_settings(cx);
 580
 581        client.add_model_message_handler(Self::handle_add_collaborator);
 582        client.add_model_message_handler(Self::handle_update_project_collaborator);
 583        client.add_model_message_handler(Self::handle_remove_collaborator);
 584        client.add_model_message_handler(Self::handle_buffer_reloaded);
 585        client.add_model_message_handler(Self::handle_buffer_saved);
 586        client.add_model_message_handler(Self::handle_start_language_server);
 587        client.add_model_message_handler(Self::handle_update_language_server);
 588        client.add_model_message_handler(Self::handle_update_project);
 589        client.add_model_message_handler(Self::handle_unshare_project);
 590        client.add_model_message_handler(Self::handle_create_buffer_for_peer);
 591        client.add_model_message_handler(Self::handle_update_buffer_file);
 592        client.add_model_request_handler(Self::handle_update_buffer);
 593        client.add_model_message_handler(Self::handle_update_diagnostic_summary);
 594        client.add_model_message_handler(Self::handle_update_worktree);
 595        client.add_model_message_handler(Self::handle_update_worktree_settings);
 596        client.add_model_request_handler(Self::handle_create_project_entry);
 597        client.add_model_request_handler(Self::handle_rename_project_entry);
 598        client.add_model_request_handler(Self::handle_copy_project_entry);
 599        client.add_model_request_handler(Self::handle_delete_project_entry);
 600        client.add_model_request_handler(Self::handle_expand_project_entry);
 601        client.add_model_request_handler(Self::handle_apply_additional_edits_for_completion);
 602        client.add_model_request_handler(Self::handle_apply_code_action);
 603        client.add_model_request_handler(Self::handle_on_type_formatting);
 604        client.add_model_request_handler(Self::handle_inlay_hints);
 605        client.add_model_request_handler(Self::handle_resolve_inlay_hint);
 606        client.add_model_request_handler(Self::handle_refresh_inlay_hints);
 607        client.add_model_request_handler(Self::handle_reload_buffers);
 608        client.add_model_request_handler(Self::handle_synchronize_buffers);
 609        client.add_model_request_handler(Self::handle_format_buffers);
 610        client.add_model_request_handler(Self::handle_lsp_command::<GetCodeActions>);
 611        client.add_model_request_handler(Self::handle_lsp_command::<GetCompletions>);
 612        client.add_model_request_handler(Self::handle_lsp_command::<GetHover>);
 613        client.add_model_request_handler(Self::handle_lsp_command::<GetDefinition>);
 614        client.add_model_request_handler(Self::handle_lsp_command::<GetTypeDefinition>);
 615        client.add_model_request_handler(Self::handle_lsp_command::<GetDocumentHighlights>);
 616        client.add_model_request_handler(Self::handle_lsp_command::<GetReferences>);
 617        client.add_model_request_handler(Self::handle_lsp_command::<PrepareRename>);
 618        client.add_model_request_handler(Self::handle_lsp_command::<PerformRename>);
 619        client.add_model_request_handler(Self::handle_search_project);
 620        client.add_model_request_handler(Self::handle_get_project_symbols);
 621        client.add_model_request_handler(Self::handle_open_buffer_for_symbol);
 622        client.add_model_request_handler(Self::handle_open_buffer_by_id);
 623        client.add_model_request_handler(Self::handle_open_buffer_by_path);
 624        client.add_model_request_handler(Self::handle_save_buffer);
 625        client.add_model_message_handler(Self::handle_update_diff_base);
 626    }
 627
 628    pub fn local(
 629        client: Arc<Client>,
 630        node: Arc<dyn NodeRuntime>,
 631        user_store: Model<UserStore>,
 632        languages: Arc<LanguageRegistry>,
 633        fs: Arc<dyn Fs>,
 634        cx: &mut AppContext,
 635    ) -> Model<Self> {
 636        cx.build_model(|cx: &mut ModelContext<Self>| {
 637            let (tx, rx) = mpsc::unbounded();
 638            cx.spawn(move |this, cx| Self::send_buffer_ordered_messages(this, rx, cx))
 639                .detach();
 640            let copilot_lsp_subscription =
 641                Copilot::global(cx).map(|copilot| subscribe_for_copilot_events(&copilot, cx));
 642            Self {
 643                worktrees: Default::default(),
 644                buffer_ordered_messages_tx: tx,
 645                collaborators: Default::default(),
 646                next_buffer_id: 0,
 647                opened_buffers: Default::default(),
 648                shared_buffers: Default::default(),
 649                incomplete_remote_buffers: Default::default(),
 650                loading_buffers_by_path: Default::default(),
 651                loading_local_worktrees: Default::default(),
 652                local_buffer_ids_by_path: Default::default(),
 653                local_buffer_ids_by_entry_id: Default::default(),
 654                buffer_snapshots: Default::default(),
 655                join_project_response_message_id: 0,
 656                client_state: None,
 657                opened_buffer: watch::channel(),
 658                client_subscriptions: Vec::new(),
 659                _subscriptions: vec![
 660                    cx.observe_global::<SettingsStore>(Self::on_settings_changed),
 661                    cx.on_release(Self::release),
 662                    cx.on_app_quit(Self::shutdown_language_servers),
 663                ],
 664                _maintain_buffer_languages: Self::maintain_buffer_languages(languages.clone(), cx),
 665                _maintain_workspace_config: Self::maintain_workspace_config(cx),
 666                active_entry: None,
 667                languages,
 668                client,
 669                user_store,
 670                fs,
 671                next_entry_id: Default::default(),
 672                next_diagnostic_group_id: Default::default(),
 673                supplementary_language_servers: HashMap::default(),
 674                language_servers: Default::default(),
 675                language_server_ids: Default::default(),
 676                language_server_statuses: Default::default(),
 677                last_workspace_edits_by_language_server: Default::default(),
 678                buffers_being_formatted: Default::default(),
 679                buffers_needing_diff: Default::default(),
 680                git_diff_debouncer: DelayedDebounced::new(),
 681                nonce: StdRng::from_entropy().gen(),
 682                terminals: Terminals {
 683                    local_handles: Vec::new(),
 684                },
 685                copilot_lsp_subscription,
 686                copilot_log_subscription: None,
 687                current_lsp_settings: ProjectSettings::get_global(cx).lsp.clone(),
 688                node: Some(node),
 689                #[cfg(not(any(test, feature = "test-support")))]
 690                default_prettier: None,
 691                prettier_instances: HashMap::default(),
 692            }
 693        })
 694    }
 695
 696    pub async fn remote(
 697        remote_id: u64,
 698        client: Arc<Client>,
 699        user_store: Model<UserStore>,
 700        languages: Arc<LanguageRegistry>,
 701        fs: Arc<dyn Fs>,
 702        mut cx: AsyncAppContext,
 703    ) -> Result<Model<Self>> {
 704        client.authenticate_and_connect(true, &cx).await?;
 705
 706        let subscription = client.subscribe_to_entity(remote_id)?;
 707        let response = client
 708            .request_envelope(proto::JoinProject {
 709                project_id: remote_id,
 710            })
 711            .await?;
 712        let this = cx.build_model(|cx| {
 713            let replica_id = response.payload.replica_id as ReplicaId;
 714
 715            let mut worktrees = Vec::new();
 716            for worktree in response.payload.worktrees {
 717                let worktree =
 718                    Worktree::remote(remote_id, replica_id, worktree, client.clone(), cx);
 719                worktrees.push(worktree);
 720            }
 721
 722            let (tx, rx) = mpsc::unbounded();
 723            cx.spawn(move |this, cx| Self::send_buffer_ordered_messages(this, rx, cx))
 724                .detach();
 725            let copilot_lsp_subscription =
 726                Copilot::global(cx).map(|copilot| subscribe_for_copilot_events(&copilot, cx));
 727            let mut this = Self {
 728                worktrees: Vec::new(),
 729                buffer_ordered_messages_tx: tx,
 730                loading_buffers_by_path: Default::default(),
 731                next_buffer_id: 0,
 732                opened_buffer: watch::channel(),
 733                shared_buffers: Default::default(),
 734                incomplete_remote_buffers: Default::default(),
 735                loading_local_worktrees: Default::default(),
 736                local_buffer_ids_by_path: Default::default(),
 737                local_buffer_ids_by_entry_id: Default::default(),
 738                active_entry: None,
 739                collaborators: Default::default(),
 740                join_project_response_message_id: response.message_id,
 741                _maintain_buffer_languages: Self::maintain_buffer_languages(languages.clone(), cx),
 742                _maintain_workspace_config: Self::maintain_workspace_config(cx),
 743                languages,
 744                user_store: user_store.clone(),
 745                fs,
 746                next_entry_id: Default::default(),
 747                next_diagnostic_group_id: Default::default(),
 748                client_subscriptions: Default::default(),
 749                _subscriptions: vec![
 750                    cx.on_release(Self::release),
 751                    cx.on_app_quit(Self::shutdown_language_servers),
 752                ],
 753                client: client.clone(),
 754                client_state: Some(ProjectClientState::Remote {
 755                    sharing_has_stopped: false,
 756                    remote_id,
 757                    replica_id,
 758                }),
 759                supplementary_language_servers: HashMap::default(),
 760                language_servers: Default::default(),
 761                language_server_ids: Default::default(),
 762                language_server_statuses: response
 763                    .payload
 764                    .language_servers
 765                    .into_iter()
 766                    .map(|server| {
 767                        (
 768                            LanguageServerId(server.id as usize),
 769                            LanguageServerStatus {
 770                                name: server.name,
 771                                pending_work: Default::default(),
 772                                has_pending_diagnostic_updates: false,
 773                                progress_tokens: Default::default(),
 774                            },
 775                        )
 776                    })
 777                    .collect(),
 778                last_workspace_edits_by_language_server: Default::default(),
 779                opened_buffers: Default::default(),
 780                buffers_being_formatted: Default::default(),
 781                buffers_needing_diff: Default::default(),
 782                git_diff_debouncer: DelayedDebounced::new(),
 783                buffer_snapshots: Default::default(),
 784                nonce: StdRng::from_entropy().gen(),
 785                terminals: Terminals {
 786                    local_handles: Vec::new(),
 787                },
 788                copilot_lsp_subscription,
 789                copilot_log_subscription: None,
 790                current_lsp_settings: ProjectSettings::get_global(cx).lsp.clone(),
 791                node: None,
 792                #[cfg(not(any(test, feature = "test-support")))]
 793                default_prettier: None,
 794                prettier_instances: HashMap::default(),
 795            };
 796            for worktree in worktrees {
 797                let _ = this.add_worktree(&worktree, cx);
 798            }
 799            this
 800        })?;
 801        let subscription = subscription.set_model(&this, &mut cx);
 802
 803        let user_ids = response
 804            .payload
 805            .collaborators
 806            .iter()
 807            .map(|peer| peer.user_id)
 808            .collect();
 809        user_store
 810            .update(&mut cx, |user_store, cx| user_store.get_users(user_ids, cx))?
 811            .await?;
 812
 813        this.update(&mut cx, |this, cx| {
 814            this.set_collaborators_from_proto(response.payload.collaborators, cx)?;
 815            this.client_subscriptions.push(subscription);
 816            anyhow::Ok(())
 817        })??;
 818
 819        Ok(this)
 820    }
 821
 822    fn release(&mut self, cx: &mut AppContext) {
 823        match &self.client_state {
 824            Some(ProjectClientState::Local { .. }) => {
 825                let _ = self.unshare_internal(cx);
 826            }
 827            Some(ProjectClientState::Remote { remote_id, .. }) => {
 828                let _ = self.client.send(proto::LeaveProject {
 829                    project_id: *remote_id,
 830                });
 831                self.disconnected_from_host_internal(cx);
 832            }
 833            _ => {}
 834        }
 835    }
 836
 837    fn shutdown_language_servers(
 838        &mut self,
 839        _cx: &mut ModelContext<Self>,
 840    ) -> impl Future<Output = ()> {
 841        let shutdown_futures = self
 842            .language_servers
 843            .drain()
 844            .map(|(_, server_state)| async {
 845                use LanguageServerState::*;
 846                match server_state {
 847                    Running { server, .. } => server.shutdown()?.await,
 848                    Starting(task) => task.await?.shutdown()?.await,
 849                }
 850            })
 851            .collect::<Vec<_>>();
 852
 853        async move {
 854            futures::future::join_all(shutdown_futures).await;
 855        }
 856    }
 857
 858    #[cfg(any(test, feature = "test-support"))]
 859    pub async fn test(
 860        fs: Arc<dyn Fs>,
 861        root_paths: impl IntoIterator<Item = &Path>,
 862        cx: &mut gpui::TestAppContext,
 863    ) -> Model<Project> {
 864        let mut languages = LanguageRegistry::test();
 865        languages.set_executor(cx.executor().clone());
 866        let http_client = util::http::FakeHttpClient::with_404_response();
 867        let client = cx.update(|cx| client::Client::new(http_client.clone(), cx));
 868        let user_store = cx.build_model(|cx| UserStore::new(client.clone(), http_client, cx));
 869        let project = cx.update(|cx| {
 870            Project::local(
 871                client,
 872                node_runtime::FakeNodeRuntime::new(),
 873                user_store,
 874                Arc::new(languages),
 875                fs,
 876                cx,
 877            )
 878        });
 879        for path in root_paths {
 880            let (tree, _) = project
 881                .update(cx, |project, cx| {
 882                    project.find_or_create_local_worktree(path, true, cx)
 883                })
 884                .await
 885                .unwrap();
 886            tree.update(cx, |tree, _| tree.as_local().unwrap().scan_complete())
 887                .await;
 888        }
 889        project
 890    }
 891
 892    fn on_settings_changed(&mut self, cx: &mut ModelContext<Self>) {
 893        let mut language_servers_to_start = Vec::new();
 894        let mut language_formatters_to_check = Vec::new();
 895        for buffer in self.opened_buffers.values() {
 896            if let Some(buffer) = buffer.upgrade() {
 897                let buffer = buffer.read(cx);
 898                let buffer_file = File::from_dyn(buffer.file());
 899                let buffer_language = buffer.language();
 900                let settings = language_settings(buffer_language, buffer.file(), cx);
 901                if let Some(language) = buffer_language {
 902                    if settings.enable_language_server {
 903                        if let Some(file) = buffer_file {
 904                            language_servers_to_start
 905                                .push((file.worktree.clone(), Arc::clone(language)));
 906                        }
 907                    }
 908                    language_formatters_to_check.push((
 909                        buffer_file.map(|f| f.worktree_id(cx)),
 910                        Arc::clone(language),
 911                        settings.clone(),
 912                    ));
 913                }
 914            }
 915        }
 916
 917        let mut language_servers_to_stop = Vec::new();
 918        let mut language_servers_to_restart = Vec::new();
 919        let languages = self.languages.to_vec();
 920
 921        let new_lsp_settings = ProjectSettings::get_global(cx).lsp.clone();
 922        let current_lsp_settings = &self.current_lsp_settings;
 923        for (worktree_id, started_lsp_name) in self.language_server_ids.keys() {
 924            let language = languages.iter().find_map(|l| {
 925                let adapter = l
 926                    .lsp_adapters()
 927                    .iter()
 928                    .find(|adapter| &adapter.name == started_lsp_name)?;
 929                Some((l, adapter))
 930            });
 931            if let Some((language, adapter)) = language {
 932                let worktree = self.worktree_for_id(*worktree_id, cx);
 933                let file = worktree.as_ref().and_then(|tree| {
 934                    tree.update(cx, |tree, cx| tree.root_file(cx).map(|f| f as _))
 935                });
 936                if !language_settings(Some(language), file.as_ref(), cx).enable_language_server {
 937                    language_servers_to_stop.push((*worktree_id, started_lsp_name.clone()));
 938                } else if let Some(worktree) = worktree {
 939                    let server_name = &adapter.name.0;
 940                    match (
 941                        current_lsp_settings.get(server_name),
 942                        new_lsp_settings.get(server_name),
 943                    ) {
 944                        (None, None) => {}
 945                        (Some(_), None) | (None, Some(_)) => {
 946                            language_servers_to_restart.push((worktree, Arc::clone(language)));
 947                        }
 948                        (Some(current_lsp_settings), Some(new_lsp_settings)) => {
 949                            if current_lsp_settings != new_lsp_settings {
 950                                language_servers_to_restart.push((worktree, Arc::clone(language)));
 951                            }
 952                        }
 953                    }
 954                }
 955            }
 956        }
 957        self.current_lsp_settings = new_lsp_settings;
 958
 959        // Stop all newly-disabled language servers.
 960        for (worktree_id, adapter_name) in language_servers_to_stop {
 961            self.stop_language_server(worktree_id, adapter_name, cx)
 962                .detach();
 963        }
 964
 965        for (worktree, language, settings) in language_formatters_to_check {
 966            self.install_default_formatters(worktree, &language, &settings, cx)
 967                .detach_and_log_err(cx);
 968        }
 969
 970        // Start all the newly-enabled language servers.
 971        for (worktree, language) in language_servers_to_start {
 972            let worktree_path = worktree.read(cx).abs_path();
 973            self.start_language_servers(&worktree, worktree_path, language, cx);
 974        }
 975
 976        // Restart all language servers with changed initialization options.
 977        for (worktree, language) in language_servers_to_restart {
 978            self.restart_language_servers(worktree, language, cx);
 979        }
 980
 981        if self.copilot_lsp_subscription.is_none() {
 982            if let Some(copilot) = Copilot::global(cx) {
 983                for buffer in self.opened_buffers.values() {
 984                    if let Some(buffer) = buffer.upgrade() {
 985                        self.register_buffer_with_copilot(&buffer, cx);
 986                    }
 987                }
 988                self.copilot_lsp_subscription = Some(subscribe_for_copilot_events(&copilot, cx));
 989            }
 990        }
 991
 992        cx.notify();
 993    }
 994
 995    pub fn buffer_for_id(&self, remote_id: u64) -> Option<Model<Buffer>> {
 996        self.opened_buffers
 997            .get(&remote_id)
 998            .and_then(|buffer| buffer.upgrade())
 999    }
1000
1001    pub fn languages(&self) -> &Arc<LanguageRegistry> {
1002        &self.languages
1003    }
1004
1005    pub fn client(&self) -> Arc<Client> {
1006        self.client.clone()
1007    }
1008
1009    pub fn user_store(&self) -> Model<UserStore> {
1010        self.user_store.clone()
1011    }
1012
1013    pub fn opened_buffers(&self) -> Vec<Model<Buffer>> {
1014        self.opened_buffers
1015            .values()
1016            .filter_map(|b| b.upgrade())
1017            .collect()
1018    }
1019
1020    #[cfg(any(test, feature = "test-support"))]
1021    pub fn has_open_buffer(&self, path: impl Into<ProjectPath>, cx: &AppContext) -> bool {
1022        let path = path.into();
1023        if let Some(worktree) = self.worktree_for_id(path.worktree_id, cx) {
1024            self.opened_buffers.iter().any(|(_, buffer)| {
1025                if let Some(buffer) = buffer.upgrade() {
1026                    if let Some(file) = File::from_dyn(buffer.read(cx).file()) {
1027                        if file.worktree == worktree && file.path() == &path.path {
1028                            return true;
1029                        }
1030                    }
1031                }
1032                false
1033            })
1034        } else {
1035            false
1036        }
1037    }
1038
1039    pub fn fs(&self) -> &Arc<dyn Fs> {
1040        &self.fs
1041    }
1042
1043    pub fn remote_id(&self) -> Option<u64> {
1044        match self.client_state.as_ref()? {
1045            ProjectClientState::Local { remote_id, .. }
1046            | ProjectClientState::Remote { remote_id, .. } => Some(*remote_id),
1047        }
1048    }
1049
1050    pub fn replica_id(&self) -> ReplicaId {
1051        match &self.client_state {
1052            Some(ProjectClientState::Remote { replica_id, .. }) => *replica_id,
1053            _ => 0,
1054        }
1055    }
1056
1057    fn metadata_changed(&mut self, cx: &mut ModelContext<Self>) {
1058        if let Some(ProjectClientState::Local { updates_tx, .. }) = &mut self.client_state {
1059            updates_tx
1060                .unbounded_send(LocalProjectUpdate::WorktreesChanged)
1061                .ok();
1062        }
1063        cx.notify();
1064    }
1065
1066    pub fn collaborators(&self) -> &HashMap<proto::PeerId, Collaborator> {
1067        &self.collaborators
1068    }
1069
1070    pub fn host(&self) -> Option<&Collaborator> {
1071        self.collaborators.values().find(|c| c.replica_id == 0)
1072    }
1073
1074    /// Collect all worktrees, including ones that don't appear in the project panel
1075    pub fn worktrees<'a>(&'a self) -> impl 'a + DoubleEndedIterator<Item = Model<Worktree>> {
1076        self.worktrees
1077            .iter()
1078            .filter_map(move |worktree| worktree.upgrade())
1079    }
1080
1081    /// Collect all user-visible worktrees, the ones that appear in the project panel
1082    pub fn visible_worktrees<'a>(
1083        &'a self,
1084        cx: &'a AppContext,
1085    ) -> impl 'a + DoubleEndedIterator<Item = Model<Worktree>> {
1086        self.worktrees.iter().filter_map(|worktree| {
1087            worktree.upgrade().and_then(|worktree| {
1088                if worktree.read(cx).is_visible() {
1089                    Some(worktree)
1090                } else {
1091                    None
1092                }
1093            })
1094        })
1095    }
1096
1097    pub fn worktree_root_names<'a>(&'a self, cx: &'a AppContext) -> impl Iterator<Item = &'a str> {
1098        self.visible_worktrees(cx)
1099            .map(|tree| tree.read(cx).root_name())
1100    }
1101
1102    pub fn worktree_for_id(&self, id: WorktreeId, cx: &AppContext) -> Option<Model<Worktree>> {
1103        self.worktrees()
1104            .find(|worktree| worktree.read(cx).id() == id)
1105    }
1106
1107    pub fn worktree_for_entry(
1108        &self,
1109        entry_id: ProjectEntryId,
1110        cx: &AppContext,
1111    ) -> Option<Model<Worktree>> {
1112        self.worktrees()
1113            .find(|worktree| worktree.read(cx).contains_entry(entry_id))
1114    }
1115
1116    pub fn worktree_id_for_entry(
1117        &self,
1118        entry_id: ProjectEntryId,
1119        cx: &AppContext,
1120    ) -> Option<WorktreeId> {
1121        self.worktree_for_entry(entry_id, cx)
1122            .map(|worktree| worktree.read(cx).id())
1123    }
1124
1125    pub fn contains_paths(&self, paths: &[PathBuf], cx: &AppContext) -> bool {
1126        paths.iter().all(|path| self.contains_path(path, cx))
1127    }
1128
1129    pub fn contains_path(&self, path: &Path, cx: &AppContext) -> bool {
1130        for worktree in self.worktrees() {
1131            let worktree = worktree.read(cx).as_local();
1132            if worktree.map_or(false, |w| w.contains_abs_path(path)) {
1133                return true;
1134            }
1135        }
1136        false
1137    }
1138
1139    pub fn create_entry(
1140        &mut self,
1141        project_path: impl Into<ProjectPath>,
1142        is_directory: bool,
1143        cx: &mut ModelContext<Self>,
1144    ) -> Option<Task<Result<Entry>>> {
1145        let project_path = project_path.into();
1146        let worktree = self.worktree_for_id(project_path.worktree_id, cx)?;
1147        if self.is_local() {
1148            Some(worktree.update(cx, |worktree, cx| {
1149                worktree
1150                    .as_local_mut()
1151                    .unwrap()
1152                    .create_entry(project_path.path, is_directory, cx)
1153            }))
1154        } else {
1155            let client = self.client.clone();
1156            let project_id = self.remote_id().unwrap();
1157            Some(cx.spawn(move |_, mut cx| async move {
1158                let response = client
1159                    .request(proto::CreateProjectEntry {
1160                        worktree_id: project_path.worktree_id.to_proto(),
1161                        project_id,
1162                        path: project_path.path.to_string_lossy().into(),
1163                        is_directory,
1164                    })
1165                    .await?;
1166                let entry = response
1167                    .entry
1168                    .ok_or_else(|| anyhow!("missing entry in response"))?;
1169                worktree
1170                    .update(&mut cx, |worktree, cx| {
1171                        worktree.as_remote_mut().unwrap().insert_entry(
1172                            entry,
1173                            response.worktree_scan_id as usize,
1174                            cx,
1175                        )
1176                    })?
1177                    .await
1178            }))
1179        }
1180    }
1181
1182    pub fn copy_entry(
1183        &mut self,
1184        entry_id: ProjectEntryId,
1185        new_path: impl Into<Arc<Path>>,
1186        cx: &mut ModelContext<Self>,
1187    ) -> Option<Task<Result<Entry>>> {
1188        let worktree = self.worktree_for_entry(entry_id, cx)?;
1189        let new_path = new_path.into();
1190        if self.is_local() {
1191            worktree.update(cx, |worktree, cx| {
1192                worktree
1193                    .as_local_mut()
1194                    .unwrap()
1195                    .copy_entry(entry_id, new_path, cx)
1196            })
1197        } else {
1198            let client = self.client.clone();
1199            let project_id = self.remote_id().unwrap();
1200
1201            Some(cx.spawn(move |_, mut cx| async move {
1202                let response = client
1203                    .request(proto::CopyProjectEntry {
1204                        project_id,
1205                        entry_id: entry_id.to_proto(),
1206                        new_path: new_path.to_string_lossy().into(),
1207                    })
1208                    .await?;
1209                let entry = response
1210                    .entry
1211                    .ok_or_else(|| anyhow!("missing entry in response"))?;
1212                worktree
1213                    .update(&mut cx, |worktree, cx| {
1214                        worktree.as_remote_mut().unwrap().insert_entry(
1215                            entry,
1216                            response.worktree_scan_id as usize,
1217                            cx,
1218                        )
1219                    })?
1220                    .await
1221            }))
1222        }
1223    }
1224
1225    pub fn rename_entry(
1226        &mut self,
1227        entry_id: ProjectEntryId,
1228        new_path: impl Into<Arc<Path>>,
1229        cx: &mut ModelContext<Self>,
1230    ) -> Option<Task<Result<Entry>>> {
1231        let worktree = self.worktree_for_entry(entry_id, cx)?;
1232        let new_path = new_path.into();
1233        if self.is_local() {
1234            worktree.update(cx, |worktree, cx| {
1235                worktree
1236                    .as_local_mut()
1237                    .unwrap()
1238                    .rename_entry(entry_id, new_path, cx)
1239            })
1240        } else {
1241            let client = self.client.clone();
1242            let project_id = self.remote_id().unwrap();
1243
1244            Some(cx.spawn(move |_, mut cx| async move {
1245                let response = client
1246                    .request(proto::RenameProjectEntry {
1247                        project_id,
1248                        entry_id: entry_id.to_proto(),
1249                        new_path: new_path.to_string_lossy().into(),
1250                    })
1251                    .await?;
1252                let entry = response
1253                    .entry
1254                    .ok_or_else(|| anyhow!("missing entry in response"))?;
1255                worktree
1256                    .update(&mut cx, |worktree, cx| {
1257                        worktree.as_remote_mut().unwrap().insert_entry(
1258                            entry,
1259                            response.worktree_scan_id as usize,
1260                            cx,
1261                        )
1262                    })?
1263                    .await
1264            }))
1265        }
1266    }
1267
1268    pub fn delete_entry(
1269        &mut self,
1270        entry_id: ProjectEntryId,
1271        cx: &mut ModelContext<Self>,
1272    ) -> Option<Task<Result<()>>> {
1273        let worktree = self.worktree_for_entry(entry_id, cx)?;
1274
1275        cx.emit(Event::DeletedEntry(entry_id));
1276
1277        if self.is_local() {
1278            worktree.update(cx, |worktree, cx| {
1279                worktree.as_local_mut().unwrap().delete_entry(entry_id, cx)
1280            })
1281        } else {
1282            let client = self.client.clone();
1283            let project_id = self.remote_id().unwrap();
1284            Some(cx.spawn(move |_, mut cx| async move {
1285                let response = client
1286                    .request(proto::DeleteProjectEntry {
1287                        project_id,
1288                        entry_id: entry_id.to_proto(),
1289                    })
1290                    .await?;
1291                worktree
1292                    .update(&mut cx, move |worktree, cx| {
1293                        worktree.as_remote_mut().unwrap().delete_entry(
1294                            entry_id,
1295                            response.worktree_scan_id as usize,
1296                            cx,
1297                        )
1298                    })?
1299                    .await
1300            }))
1301        }
1302    }
1303
1304    pub fn expand_entry(
1305        &mut self,
1306        worktree_id: WorktreeId,
1307        entry_id: ProjectEntryId,
1308        cx: &mut ModelContext<Self>,
1309    ) -> Option<Task<Result<()>>> {
1310        let worktree = self.worktree_for_id(worktree_id, cx)?;
1311        if self.is_local() {
1312            worktree.update(cx, |worktree, cx| {
1313                worktree.as_local_mut().unwrap().expand_entry(entry_id, cx)
1314            })
1315        } else {
1316            let worktree = worktree.downgrade();
1317            let request = self.client.request(proto::ExpandProjectEntry {
1318                project_id: self.remote_id().unwrap(),
1319                entry_id: entry_id.to_proto(),
1320            });
1321            Some(cx.spawn(move |_, mut cx| async move {
1322                let response = request.await?;
1323                if let Some(worktree) = worktree.upgrade() {
1324                    worktree
1325                        .update(&mut cx, |worktree, _| {
1326                            worktree
1327                                .as_remote_mut()
1328                                .unwrap()
1329                                .wait_for_snapshot(response.worktree_scan_id as usize)
1330                        })?
1331                        .await?;
1332                }
1333                Ok(())
1334            }))
1335        }
1336    }
1337
1338    pub fn shared(&mut self, project_id: u64, cx: &mut ModelContext<Self>) -> Result<()> {
1339        if self.client_state.is_some() {
1340            return Err(anyhow!("project was already shared"));
1341        }
1342        self.client_subscriptions.push(
1343            self.client
1344                .subscribe_to_entity(project_id)?
1345                .set_model(&cx.handle(), &mut cx.to_async()),
1346        );
1347
1348        for open_buffer in self.opened_buffers.values_mut() {
1349            match open_buffer {
1350                OpenBuffer::Strong(_) => {}
1351                OpenBuffer::Weak(buffer) => {
1352                    if let Some(buffer) = buffer.upgrade() {
1353                        *open_buffer = OpenBuffer::Strong(buffer);
1354                    }
1355                }
1356                OpenBuffer::Operations(_) => unreachable!(),
1357            }
1358        }
1359
1360        for worktree_handle in self.worktrees.iter_mut() {
1361            match worktree_handle {
1362                WorktreeHandle::Strong(_) => {}
1363                WorktreeHandle::Weak(worktree) => {
1364                    if let Some(worktree) = worktree.upgrade() {
1365                        *worktree_handle = WorktreeHandle::Strong(worktree);
1366                    }
1367                }
1368            }
1369        }
1370
1371        for (server_id, status) in &self.language_server_statuses {
1372            self.client
1373                .send(proto::StartLanguageServer {
1374                    project_id,
1375                    server: Some(proto::LanguageServer {
1376                        id: server_id.0 as u64,
1377                        name: status.name.clone(),
1378                    }),
1379                })
1380                .log_err();
1381        }
1382
1383        let store = cx.global::<SettingsStore>();
1384        for worktree in self.worktrees() {
1385            let worktree_id = worktree.read(cx).id().to_proto();
1386            for (path, content) in store.local_settings(worktree.entity_id().as_u64() as usize) {
1387                self.client
1388                    .send(proto::UpdateWorktreeSettings {
1389                        project_id,
1390                        worktree_id,
1391                        path: path.to_string_lossy().into(),
1392                        content: Some(content),
1393                    })
1394                    .log_err();
1395            }
1396        }
1397
1398        let (updates_tx, mut updates_rx) = mpsc::unbounded();
1399        let client = self.client.clone();
1400        self.client_state = Some(ProjectClientState::Local {
1401            remote_id: project_id,
1402            updates_tx,
1403            _send_updates: cx.spawn(move |this, mut cx| async move {
1404                while let Some(update) = updates_rx.next().await {
1405                    match update {
1406                        LocalProjectUpdate::WorktreesChanged => {
1407                            let worktrees = this.update(&mut cx, |this, _cx| {
1408                                this.worktrees().collect::<Vec<_>>()
1409                            })?;
1410                            let update_project = this
1411                                .update(&mut cx, |this, cx| {
1412                                    this.client.request(proto::UpdateProject {
1413                                        project_id,
1414                                        worktrees: this.worktree_metadata_protos(cx),
1415                                    })
1416                                })?
1417                                .await;
1418                            if update_project.is_ok() {
1419                                for worktree in worktrees {
1420                                    worktree.update(&mut cx, |worktree, cx| {
1421                                        let worktree = worktree.as_local_mut().unwrap();
1422                                        worktree.share(project_id, cx).detach_and_log_err(cx)
1423                                    })?;
1424                                }
1425                            }
1426                        }
1427                        LocalProjectUpdate::CreateBufferForPeer { peer_id, buffer_id } => {
1428                            let buffer = this.update(&mut cx, |this, _| {
1429                                let buffer = this.opened_buffers.get(&buffer_id).unwrap();
1430                                let shared_buffers =
1431                                    this.shared_buffers.entry(peer_id).or_default();
1432                                if shared_buffers.insert(buffer_id) {
1433                                    if let OpenBuffer::Strong(buffer) = buffer {
1434                                        Some(buffer.clone())
1435                                    } else {
1436                                        None
1437                                    }
1438                                } else {
1439                                    None
1440                                }
1441                            })?;
1442
1443                            let Some(buffer) = buffer else { continue };
1444                            let operations =
1445                                buffer.update(&mut cx, |b, cx| b.serialize_ops(None, cx))?;
1446                            let operations = operations.await;
1447                            let state = buffer.update(&mut cx, |buffer, _| buffer.to_proto())?;
1448
1449                            let initial_state = proto::CreateBufferForPeer {
1450                                project_id,
1451                                peer_id: Some(peer_id),
1452                                variant: Some(proto::create_buffer_for_peer::Variant::State(state)),
1453                            };
1454                            if client.send(initial_state).log_err().is_some() {
1455                                let client = client.clone();
1456                                cx.background_executor()
1457                                    .spawn(async move {
1458                                        let mut chunks = split_operations(operations).peekable();
1459                                        while let Some(chunk) = chunks.next() {
1460                                            let is_last = chunks.peek().is_none();
1461                                            client.send(proto::CreateBufferForPeer {
1462                                                project_id,
1463                                                peer_id: Some(peer_id),
1464                                                variant: Some(
1465                                                    proto::create_buffer_for_peer::Variant::Chunk(
1466                                                        proto::BufferChunk {
1467                                                            buffer_id,
1468                                                            operations: chunk,
1469                                                            is_last,
1470                                                        },
1471                                                    ),
1472                                                ),
1473                                            })?;
1474                                        }
1475                                        anyhow::Ok(())
1476                                    })
1477                                    .await
1478                                    .log_err();
1479                            }
1480                        }
1481                    }
1482                }
1483                Ok(())
1484            }),
1485        });
1486
1487        self.metadata_changed(cx);
1488        cx.emit(Event::RemoteIdChanged(Some(project_id)));
1489        cx.notify();
1490        Ok(())
1491    }
1492
1493    pub fn reshared(
1494        &mut self,
1495        message: proto::ResharedProject,
1496        cx: &mut ModelContext<Self>,
1497    ) -> Result<()> {
1498        self.shared_buffers.clear();
1499        self.set_collaborators_from_proto(message.collaborators, cx)?;
1500        self.metadata_changed(cx);
1501        Ok(())
1502    }
1503
1504    pub fn rejoined(
1505        &mut self,
1506        message: proto::RejoinedProject,
1507        message_id: u32,
1508        cx: &mut ModelContext<Self>,
1509    ) -> Result<()> {
1510        cx.update_global::<SettingsStore, _>(|store, cx| {
1511            for worktree in &self.worktrees {
1512                store
1513                    .clear_local_settings(worktree.handle_id(), cx)
1514                    .log_err();
1515            }
1516        });
1517
1518        self.join_project_response_message_id = message_id;
1519        self.set_worktrees_from_proto(message.worktrees, cx)?;
1520        self.set_collaborators_from_proto(message.collaborators, cx)?;
1521        self.language_server_statuses = message
1522            .language_servers
1523            .into_iter()
1524            .map(|server| {
1525                (
1526                    LanguageServerId(server.id as usize),
1527                    LanguageServerStatus {
1528                        name: server.name,
1529                        pending_work: Default::default(),
1530                        has_pending_diagnostic_updates: false,
1531                        progress_tokens: Default::default(),
1532                    },
1533                )
1534            })
1535            .collect();
1536        self.buffer_ordered_messages_tx
1537            .unbounded_send(BufferOrderedMessage::Resync)
1538            .unwrap();
1539        cx.notify();
1540        Ok(())
1541    }
1542
1543    pub fn unshare(&mut self, cx: &mut ModelContext<Self>) -> Result<()> {
1544        self.unshare_internal(cx)?;
1545        self.metadata_changed(cx);
1546        cx.notify();
1547        Ok(())
1548    }
1549
1550    fn unshare_internal(&mut self, cx: &mut AppContext) -> Result<()> {
1551        if self.is_remote() {
1552            return Err(anyhow!("attempted to unshare a remote project"));
1553        }
1554
1555        if let Some(ProjectClientState::Local { remote_id, .. }) = self.client_state.take() {
1556            self.collaborators.clear();
1557            self.shared_buffers.clear();
1558            self.client_subscriptions.clear();
1559
1560            for worktree_handle in self.worktrees.iter_mut() {
1561                if let WorktreeHandle::Strong(worktree) = worktree_handle {
1562                    let is_visible = worktree.update(cx, |worktree, _| {
1563                        worktree.as_local_mut().unwrap().unshare();
1564                        worktree.is_visible()
1565                    });
1566                    if !is_visible {
1567                        *worktree_handle = WorktreeHandle::Weak(worktree.downgrade());
1568                    }
1569                }
1570            }
1571
1572            for open_buffer in self.opened_buffers.values_mut() {
1573                // Wake up any tasks waiting for peers' edits to this buffer.
1574                if let Some(buffer) = open_buffer.upgrade() {
1575                    buffer.update(cx, |buffer, _| buffer.give_up_waiting());
1576                }
1577
1578                if let OpenBuffer::Strong(buffer) = open_buffer {
1579                    *open_buffer = OpenBuffer::Weak(buffer.downgrade());
1580                }
1581            }
1582
1583            self.client.send(proto::UnshareProject {
1584                project_id: remote_id,
1585            })?;
1586
1587            Ok(())
1588        } else {
1589            Err(anyhow!("attempted to unshare an unshared project"))
1590        }
1591    }
1592
1593    pub fn disconnected_from_host(&mut self, cx: &mut ModelContext<Self>) {
1594        self.disconnected_from_host_internal(cx);
1595        cx.emit(Event::DisconnectedFromHost);
1596        cx.notify();
1597    }
1598
1599    fn disconnected_from_host_internal(&mut self, cx: &mut AppContext) {
1600        if let Some(ProjectClientState::Remote {
1601            sharing_has_stopped,
1602            ..
1603        }) = &mut self.client_state
1604        {
1605            *sharing_has_stopped = true;
1606
1607            self.collaborators.clear();
1608
1609            for worktree in &self.worktrees {
1610                if let Some(worktree) = worktree.upgrade() {
1611                    worktree.update(cx, |worktree, _| {
1612                        if let Some(worktree) = worktree.as_remote_mut() {
1613                            worktree.disconnected_from_host();
1614                        }
1615                    });
1616                }
1617            }
1618
1619            for open_buffer in self.opened_buffers.values_mut() {
1620                // Wake up any tasks waiting for peers' edits to this buffer.
1621                if let Some(buffer) = open_buffer.upgrade() {
1622                    buffer.update(cx, |buffer, _| buffer.give_up_waiting());
1623                }
1624
1625                if let OpenBuffer::Strong(buffer) = open_buffer {
1626                    *open_buffer = OpenBuffer::Weak(buffer.downgrade());
1627                }
1628            }
1629
1630            // Wake up all futures currently waiting on a buffer to get opened,
1631            // to give them a chance to fail now that we've disconnected.
1632            *self.opened_buffer.0.borrow_mut() = ();
1633        }
1634    }
1635
1636    pub fn close(&mut self, cx: &mut ModelContext<Self>) {
1637        cx.emit(Event::Closed);
1638    }
1639
1640    pub fn is_read_only(&self) -> bool {
1641        match &self.client_state {
1642            Some(ProjectClientState::Remote {
1643                sharing_has_stopped,
1644                ..
1645            }) => *sharing_has_stopped,
1646            _ => false,
1647        }
1648    }
1649
1650    pub fn is_local(&self) -> bool {
1651        match &self.client_state {
1652            Some(ProjectClientState::Remote { .. }) => false,
1653            _ => true,
1654        }
1655    }
1656
1657    pub fn is_remote(&self) -> bool {
1658        !self.is_local()
1659    }
1660
1661    pub fn create_buffer(
1662        &mut self,
1663        text: &str,
1664        language: Option<Arc<Language>>,
1665        cx: &mut ModelContext<Self>,
1666    ) -> Result<Model<Buffer>> {
1667        if self.is_remote() {
1668            return Err(anyhow!("creating buffers as a guest is not supported yet"));
1669        }
1670        let id = post_inc(&mut self.next_buffer_id);
1671        let buffer = cx.build_model(|cx| {
1672            Buffer::new(self.replica_id(), id, text)
1673                .with_language(language.unwrap_or_else(|| language::PLAIN_TEXT.clone()), cx)
1674        });
1675        self.register_buffer(&buffer, cx)?;
1676        Ok(buffer)
1677    }
1678
1679    pub fn open_path(
1680        &mut self,
1681        path: impl Into<ProjectPath>,
1682        cx: &mut ModelContext<Self>,
1683    ) -> Task<Result<(ProjectEntryId, AnyModel)>> {
1684        let task = self.open_buffer(path, cx);
1685        cx.spawn(move |_, mut cx| async move {
1686            let buffer = task.await?;
1687            let project_entry_id = buffer
1688                .update(&mut cx, |buffer, cx| {
1689                    File::from_dyn(buffer.file()).and_then(|file| file.project_entry_id(cx))
1690                })?
1691                .ok_or_else(|| anyhow!("no project entry"))?;
1692
1693            let buffer: &AnyModel = &buffer;
1694            Ok((project_entry_id, buffer.clone()))
1695        })
1696    }
1697
1698    pub fn open_local_buffer(
1699        &mut self,
1700        abs_path: impl AsRef<Path>,
1701        cx: &mut ModelContext<Self>,
1702    ) -> Task<Result<Model<Buffer>>> {
1703        if let Some((worktree, relative_path)) = self.find_local_worktree(abs_path.as_ref(), cx) {
1704            self.open_buffer((worktree.read(cx).id(), relative_path), cx)
1705        } else {
1706            Task::ready(Err(anyhow!("no such path")))
1707        }
1708    }
1709
1710    pub fn open_buffer(
1711        &mut self,
1712        path: impl Into<ProjectPath>,
1713        cx: &mut ModelContext<Self>,
1714    ) -> Task<Result<Model<Buffer>>> {
1715        let project_path = path.into();
1716        let worktree = if let Some(worktree) = self.worktree_for_id(project_path.worktree_id, cx) {
1717            worktree
1718        } else {
1719            return Task::ready(Err(anyhow!("no such worktree")));
1720        };
1721
1722        // If there is already a buffer for the given path, then return it.
1723        let existing_buffer = self.get_open_buffer(&project_path, cx);
1724        if let Some(existing_buffer) = existing_buffer {
1725            return Task::ready(Ok(existing_buffer));
1726        }
1727
1728        let loading_watch = match self.loading_buffers_by_path.entry(project_path.clone()) {
1729            // If the given path is already being loaded, then wait for that existing
1730            // task to complete and return the same buffer.
1731            hash_map::Entry::Occupied(e) => e.get().clone(),
1732
1733            // Otherwise, record the fact that this path is now being loaded.
1734            hash_map::Entry::Vacant(entry) => {
1735                let (mut tx, rx) = postage::watch::channel();
1736                entry.insert(rx.clone());
1737
1738                let load_buffer = if worktree.read(cx).is_local() {
1739                    self.open_local_buffer_internal(&project_path.path, &worktree, cx)
1740                } else {
1741                    self.open_remote_buffer_internal(&project_path.path, &worktree, cx)
1742                };
1743
1744                cx.spawn(move |this, mut cx| async move {
1745                    let load_result = load_buffer.await;
1746                    *tx.borrow_mut() = Some(this.update(&mut cx, |this, _| {
1747                        // Record the fact that the buffer is no longer loading.
1748                        this.loading_buffers_by_path.remove(&project_path);
1749                        let buffer = load_result.map_err(Arc::new)?;
1750                        Ok(buffer)
1751                    })?);
1752                    anyhow::Ok(())
1753                })
1754                .detach();
1755                rx
1756            }
1757        };
1758
1759        cx.background_executor().spawn(async move {
1760            wait_for_loading_buffer(loading_watch)
1761                .await
1762                .map_err(|error| anyhow!("{}", error))
1763        })
1764    }
1765
1766    fn open_local_buffer_internal(
1767        &mut self,
1768        path: &Arc<Path>,
1769        worktree: &Model<Worktree>,
1770        cx: &mut ModelContext<Self>,
1771    ) -> Task<Result<Model<Buffer>>> {
1772        let buffer_id = post_inc(&mut self.next_buffer_id);
1773        let load_buffer = worktree.update(cx, |worktree, cx| {
1774            let worktree = worktree.as_local_mut().unwrap();
1775            worktree.load_buffer(buffer_id, path, cx)
1776        });
1777        cx.spawn(move |this, mut cx| async move {
1778            let buffer = load_buffer.await?;
1779            this.update(&mut cx, |this, cx| this.register_buffer(&buffer, cx))??;
1780            Ok(buffer)
1781        })
1782    }
1783
1784    fn open_remote_buffer_internal(
1785        &mut self,
1786        path: &Arc<Path>,
1787        worktree: &Model<Worktree>,
1788        cx: &mut ModelContext<Self>,
1789    ) -> Task<Result<Model<Buffer>>> {
1790        let rpc = self.client.clone();
1791        let project_id = self.remote_id().unwrap();
1792        let remote_worktree_id = worktree.read(cx).id();
1793        let path = path.clone();
1794        let path_string = path.to_string_lossy().to_string();
1795        cx.spawn(move |this, mut cx| async move {
1796            let response = rpc
1797                .request(proto::OpenBufferByPath {
1798                    project_id,
1799                    worktree_id: remote_worktree_id.to_proto(),
1800                    path: path_string,
1801                })
1802                .await?;
1803            this.update(&mut cx, |this, cx| {
1804                this.wait_for_remote_buffer(response.buffer_id, cx)
1805            })?
1806            .await
1807        })
1808    }
1809
1810    /// LanguageServerName is owned, because it is inserted into a map
1811    pub fn open_local_buffer_via_lsp(
1812        &mut self,
1813        abs_path: lsp::Url,
1814        language_server_id: LanguageServerId,
1815        language_server_name: LanguageServerName,
1816        cx: &mut ModelContext<Self>,
1817    ) -> Task<Result<Model<Buffer>>> {
1818        cx.spawn(move |this, mut cx| async move {
1819            let abs_path = abs_path
1820                .to_file_path()
1821                .map_err(|_| anyhow!("can't convert URI to path"))?;
1822            let (worktree, relative_path) = if let Some(result) =
1823                this.update(&mut cx, |this, cx| this.find_local_worktree(&abs_path, cx))?
1824            {
1825                result
1826            } else {
1827                let worktree = this
1828                    .update(&mut cx, |this, cx| {
1829                        this.create_local_worktree(&abs_path, false, cx)
1830                    })?
1831                    .await?;
1832                this.update(&mut cx, |this, cx| {
1833                    this.language_server_ids.insert(
1834                        (worktree.read(cx).id(), language_server_name),
1835                        language_server_id,
1836                    );
1837                })
1838                .ok();
1839                (worktree, PathBuf::new())
1840            };
1841
1842            let project_path = ProjectPath {
1843                worktree_id: worktree.update(&mut cx, |worktree, _| worktree.id())?,
1844                path: relative_path.into(),
1845            };
1846            this.update(&mut cx, |this, cx| this.open_buffer(project_path, cx))?
1847                .await
1848        })
1849    }
1850
1851    pub fn open_buffer_by_id(
1852        &mut self,
1853        id: u64,
1854        cx: &mut ModelContext<Self>,
1855    ) -> Task<Result<Model<Buffer>>> {
1856        if let Some(buffer) = self.buffer_for_id(id) {
1857            Task::ready(Ok(buffer))
1858        } else if self.is_local() {
1859            Task::ready(Err(anyhow!("buffer {} does not exist", id)))
1860        } else if let Some(project_id) = self.remote_id() {
1861            let request = self
1862                .client
1863                .request(proto::OpenBufferById { project_id, id });
1864            cx.spawn(move |this, mut cx| async move {
1865                let buffer_id = request.await?.buffer_id;
1866                this.update(&mut cx, |this, cx| {
1867                    this.wait_for_remote_buffer(buffer_id, cx)
1868                })?
1869                .await
1870            })
1871        } else {
1872            Task::ready(Err(anyhow!("cannot open buffer while disconnected")))
1873        }
1874    }
1875
1876    pub fn save_buffers(
1877        &self,
1878        buffers: HashSet<Model<Buffer>>,
1879        cx: &mut ModelContext<Self>,
1880    ) -> Task<Result<()>> {
1881        cx.spawn(move |this, mut cx| async move {
1882            let save_tasks = buffers.into_iter().filter_map(|buffer| {
1883                this.update(&mut cx, |this, cx| this.save_buffer(buffer, cx))
1884                    .ok()
1885            });
1886            try_join_all(save_tasks).await?;
1887            Ok(())
1888        })
1889    }
1890
1891    pub fn save_buffer(
1892        &self,
1893        buffer: Model<Buffer>,
1894        cx: &mut ModelContext<Self>,
1895    ) -> Task<Result<()>> {
1896        let Some(file) = File::from_dyn(buffer.read(cx).file()) else {
1897            return Task::ready(Err(anyhow!("buffer doesn't have a file")));
1898        };
1899        let worktree = file.worktree.clone();
1900        let path = file.path.clone();
1901        worktree.update(cx, |worktree, cx| match worktree {
1902            Worktree::Local(worktree) => worktree.save_buffer(buffer, path, false, cx),
1903            Worktree::Remote(worktree) => worktree.save_buffer(buffer, cx),
1904        })
1905    }
1906
1907    pub fn save_buffer_as(
1908        &mut self,
1909        buffer: Model<Buffer>,
1910        abs_path: PathBuf,
1911        cx: &mut ModelContext<Self>,
1912    ) -> Task<Result<()>> {
1913        let worktree_task = self.find_or_create_local_worktree(&abs_path, true, cx);
1914        let old_file = File::from_dyn(buffer.read(cx).file())
1915            .filter(|f| f.is_local())
1916            .cloned();
1917        cx.spawn(move |this, mut cx| async move {
1918            if let Some(old_file) = &old_file {
1919                this.update(&mut cx, |this, cx| {
1920                    this.unregister_buffer_from_language_servers(&buffer, old_file, cx);
1921                })?;
1922            }
1923            let (worktree, path) = worktree_task.await?;
1924            worktree
1925                .update(&mut cx, |worktree, cx| match worktree {
1926                    Worktree::Local(worktree) => {
1927                        worktree.save_buffer(buffer.clone(), path.into(), true, cx)
1928                    }
1929                    Worktree::Remote(_) => panic!("cannot remote buffers as new files"),
1930                })?
1931                .await?;
1932
1933            this.update(&mut cx, |this, cx| {
1934                this.detect_language_for_buffer(&buffer, cx);
1935                this.register_buffer_with_language_servers(&buffer, cx);
1936            })?;
1937            Ok(())
1938        })
1939    }
1940
1941    pub fn get_open_buffer(
1942        &mut self,
1943        path: &ProjectPath,
1944        cx: &mut ModelContext<Self>,
1945    ) -> Option<Model<Buffer>> {
1946        let worktree = self.worktree_for_id(path.worktree_id, cx)?;
1947        self.opened_buffers.values().find_map(|buffer| {
1948            let buffer = buffer.upgrade()?;
1949            let file = File::from_dyn(buffer.read(cx).file())?;
1950            if file.worktree == worktree && file.path() == &path.path {
1951                Some(buffer)
1952            } else {
1953                None
1954            }
1955        })
1956    }
1957
1958    fn register_buffer(
1959        &mut self,
1960        buffer: &Model<Buffer>,
1961        cx: &mut ModelContext<Self>,
1962    ) -> Result<()> {
1963        self.request_buffer_diff_recalculation(buffer, cx);
1964        buffer.update(cx, |buffer, _| {
1965            buffer.set_language_registry(self.languages.clone())
1966        });
1967
1968        let remote_id = buffer.read(cx).remote_id();
1969        let is_remote = self.is_remote();
1970        let open_buffer = if is_remote || self.is_shared() {
1971            OpenBuffer::Strong(buffer.clone())
1972        } else {
1973            OpenBuffer::Weak(buffer.downgrade())
1974        };
1975
1976        match self.opened_buffers.entry(remote_id) {
1977            hash_map::Entry::Vacant(entry) => {
1978                entry.insert(open_buffer);
1979            }
1980            hash_map::Entry::Occupied(mut entry) => {
1981                if let OpenBuffer::Operations(operations) = entry.get_mut() {
1982                    buffer.update(cx, |b, cx| b.apply_ops(operations.drain(..), cx))?;
1983                } else if entry.get().upgrade().is_some() {
1984                    if is_remote {
1985                        return Ok(());
1986                    } else {
1987                        debug_panic!("buffer {} was already registered", remote_id);
1988                        Err(anyhow!("buffer {} was already registered", remote_id))?;
1989                    }
1990                }
1991                entry.insert(open_buffer);
1992            }
1993        }
1994        cx.subscribe(buffer, |this, buffer, event, cx| {
1995            this.on_buffer_event(buffer, event, cx);
1996        })
1997        .detach();
1998
1999        if let Some(file) = File::from_dyn(buffer.read(cx).file()) {
2000            if file.is_local {
2001                self.local_buffer_ids_by_path.insert(
2002                    ProjectPath {
2003                        worktree_id: file.worktree_id(cx),
2004                        path: file.path.clone(),
2005                    },
2006                    remote_id,
2007                );
2008
2009                self.local_buffer_ids_by_entry_id
2010                    .insert(file.entry_id, remote_id);
2011            }
2012        }
2013
2014        self.detect_language_for_buffer(buffer, cx);
2015        self.register_buffer_with_language_servers(buffer, cx);
2016        self.register_buffer_with_copilot(buffer, cx);
2017        cx.observe_release(buffer, |this, buffer, cx| {
2018            if let Some(file) = File::from_dyn(buffer.file()) {
2019                if file.is_local() {
2020                    let uri = lsp::Url::from_file_path(file.abs_path(cx)).unwrap();
2021                    for server in this.language_servers_for_buffer(buffer, cx) {
2022                        server
2023                            .1
2024                            .notify::<lsp::notification::DidCloseTextDocument>(
2025                                lsp::DidCloseTextDocumentParams {
2026                                    text_document: lsp::TextDocumentIdentifier::new(uri.clone()),
2027                                },
2028                            )
2029                            .log_err();
2030                    }
2031                }
2032            }
2033        })
2034        .detach();
2035
2036        *self.opened_buffer.0.borrow_mut() = ();
2037        Ok(())
2038    }
2039
2040    fn register_buffer_with_language_servers(
2041        &mut self,
2042        buffer_handle: &Model<Buffer>,
2043        cx: &mut ModelContext<Self>,
2044    ) {
2045        let buffer = buffer_handle.read(cx);
2046        let buffer_id = buffer.remote_id();
2047
2048        if let Some(file) = File::from_dyn(buffer.file()) {
2049            if !file.is_local() {
2050                return;
2051            }
2052
2053            let abs_path = file.abs_path(cx);
2054            let uri = lsp::Url::from_file_path(&abs_path)
2055                .unwrap_or_else(|()| panic!("Failed to register file {abs_path:?}"));
2056            let initial_snapshot = buffer.text_snapshot();
2057            let language = buffer.language().cloned();
2058            let worktree_id = file.worktree_id(cx);
2059
2060            if let Some(local_worktree) = file.worktree.read(cx).as_local() {
2061                for (server_id, diagnostics) in local_worktree.diagnostics_for_path(file.path()) {
2062                    self.update_buffer_diagnostics(buffer_handle, server_id, None, diagnostics, cx)
2063                        .log_err();
2064                }
2065            }
2066
2067            if let Some(language) = language {
2068                for adapter in language.lsp_adapters() {
2069                    let language_id = adapter.language_ids.get(language.name().as_ref()).cloned();
2070                    let server = self
2071                        .language_server_ids
2072                        .get(&(worktree_id, adapter.name.clone()))
2073                        .and_then(|id| self.language_servers.get(id))
2074                        .and_then(|server_state| {
2075                            if let LanguageServerState::Running { server, .. } = server_state {
2076                                Some(server.clone())
2077                            } else {
2078                                None
2079                            }
2080                        });
2081                    let server = match server {
2082                        Some(server) => server,
2083                        None => continue,
2084                    };
2085
2086                    server
2087                        .notify::<lsp::notification::DidOpenTextDocument>(
2088                            lsp::DidOpenTextDocumentParams {
2089                                text_document: lsp::TextDocumentItem::new(
2090                                    uri.clone(),
2091                                    language_id.unwrap_or_default(),
2092                                    0,
2093                                    initial_snapshot.text(),
2094                                ),
2095                            },
2096                        )
2097                        .log_err();
2098
2099                    buffer_handle.update(cx, |buffer, cx| {
2100                        buffer.set_completion_triggers(
2101                            server
2102                                .capabilities()
2103                                .completion_provider
2104                                .as_ref()
2105                                .and_then(|provider| provider.trigger_characters.clone())
2106                                .unwrap_or_default(),
2107                            cx,
2108                        );
2109                    });
2110
2111                    let snapshot = LspBufferSnapshot {
2112                        version: 0,
2113                        snapshot: initial_snapshot.clone(),
2114                    };
2115                    self.buffer_snapshots
2116                        .entry(buffer_id)
2117                        .or_default()
2118                        .insert(server.server_id(), vec![snapshot]);
2119                }
2120            }
2121        }
2122    }
2123
2124    fn unregister_buffer_from_language_servers(
2125        &mut self,
2126        buffer: &Model<Buffer>,
2127        old_file: &File,
2128        cx: &mut ModelContext<Self>,
2129    ) {
2130        let old_path = match old_file.as_local() {
2131            Some(local) => local.abs_path(cx),
2132            None => return,
2133        };
2134
2135        buffer.update(cx, |buffer, cx| {
2136            let worktree_id = old_file.worktree_id(cx);
2137            let ids = &self.language_server_ids;
2138
2139            let language = buffer.language().cloned();
2140            let adapters = language.iter().flat_map(|language| language.lsp_adapters());
2141            for &server_id in adapters.flat_map(|a| ids.get(&(worktree_id, a.name.clone()))) {
2142                buffer.update_diagnostics(server_id, Default::default(), cx);
2143            }
2144
2145            self.buffer_snapshots.remove(&buffer.remote_id());
2146            let file_url = lsp::Url::from_file_path(old_path).unwrap();
2147            for (_, language_server) in self.language_servers_for_buffer(buffer, cx) {
2148                language_server
2149                    .notify::<lsp::notification::DidCloseTextDocument>(
2150                        lsp::DidCloseTextDocumentParams {
2151                            text_document: lsp::TextDocumentIdentifier::new(file_url.clone()),
2152                        },
2153                    )
2154                    .log_err();
2155            }
2156        });
2157    }
2158
2159    fn register_buffer_with_copilot(
2160        &self,
2161        buffer_handle: &Model<Buffer>,
2162        cx: &mut ModelContext<Self>,
2163    ) {
2164        if let Some(copilot) = Copilot::global(cx) {
2165            copilot.update(cx, |copilot, cx| copilot.register_buffer(buffer_handle, cx));
2166        }
2167    }
2168
2169    async fn send_buffer_ordered_messages(
2170        this: WeakModel<Self>,
2171        rx: UnboundedReceiver<BufferOrderedMessage>,
2172        mut cx: AsyncAppContext,
2173    ) -> Result<()> {
2174        const MAX_BATCH_SIZE: usize = 128;
2175
2176        let mut operations_by_buffer_id = HashMap::default();
2177        async fn flush_operations(
2178            this: &WeakModel<Project>,
2179            operations_by_buffer_id: &mut HashMap<u64, Vec<proto::Operation>>,
2180            needs_resync_with_host: &mut bool,
2181            is_local: bool,
2182            cx: &mut AsyncAppContext,
2183        ) -> Result<()> {
2184            for (buffer_id, operations) in operations_by_buffer_id.drain() {
2185                let request = this.update(cx, |this, _| {
2186                    let project_id = this.remote_id()?;
2187                    Some(this.client.request(proto::UpdateBuffer {
2188                        buffer_id,
2189                        project_id,
2190                        operations,
2191                    }))
2192                })?;
2193                if let Some(request) = request {
2194                    if request.await.is_err() && !is_local {
2195                        *needs_resync_with_host = true;
2196                        break;
2197                    }
2198                }
2199            }
2200            Ok(())
2201        }
2202
2203        let mut needs_resync_with_host = false;
2204        let mut changes = rx.ready_chunks(MAX_BATCH_SIZE);
2205
2206        while let Some(changes) = changes.next().await {
2207            let is_local = this.update(&mut cx, |this, _| this.is_local())?;
2208
2209            for change in changes {
2210                match change {
2211                    BufferOrderedMessage::Operation {
2212                        buffer_id,
2213                        operation,
2214                    } => {
2215                        if needs_resync_with_host {
2216                            continue;
2217                        }
2218
2219                        operations_by_buffer_id
2220                            .entry(buffer_id)
2221                            .or_insert(Vec::new())
2222                            .push(operation);
2223                    }
2224
2225                    BufferOrderedMessage::Resync => {
2226                        operations_by_buffer_id.clear();
2227                        if this
2228                            .update(&mut cx, |this, cx| this.synchronize_remote_buffers(cx))?
2229                            .await
2230                            .is_ok()
2231                        {
2232                            needs_resync_with_host = false;
2233                        }
2234                    }
2235
2236                    BufferOrderedMessage::LanguageServerUpdate {
2237                        language_server_id,
2238                        message,
2239                    } => {
2240                        flush_operations(
2241                            &this,
2242                            &mut operations_by_buffer_id,
2243                            &mut needs_resync_with_host,
2244                            is_local,
2245                            &mut cx,
2246                        )
2247                        .await?;
2248
2249                        this.update(&mut cx, |this, _| {
2250                            if let Some(project_id) = this.remote_id() {
2251                                this.client
2252                                    .send(proto::UpdateLanguageServer {
2253                                        project_id,
2254                                        language_server_id: language_server_id.0 as u64,
2255                                        variant: Some(message),
2256                                    })
2257                                    .log_err();
2258                            }
2259                        })?;
2260                    }
2261                }
2262            }
2263
2264            flush_operations(
2265                &this,
2266                &mut operations_by_buffer_id,
2267                &mut needs_resync_with_host,
2268                is_local,
2269                &mut cx,
2270            )
2271            .await?;
2272        }
2273
2274        Ok(())
2275    }
2276
2277    fn on_buffer_event(
2278        &mut self,
2279        buffer: Model<Buffer>,
2280        event: &BufferEvent,
2281        cx: &mut ModelContext<Self>,
2282    ) -> Option<()> {
2283        if matches!(
2284            event,
2285            BufferEvent::Edited { .. } | BufferEvent::Reloaded | BufferEvent::DiffBaseChanged
2286        ) {
2287            self.request_buffer_diff_recalculation(&buffer, cx);
2288        }
2289
2290        match event {
2291            BufferEvent::Operation(operation) => {
2292                self.buffer_ordered_messages_tx
2293                    .unbounded_send(BufferOrderedMessage::Operation {
2294                        buffer_id: buffer.read(cx).remote_id(),
2295                        operation: language::proto::serialize_operation(operation),
2296                    })
2297                    .ok();
2298            }
2299
2300            BufferEvent::Edited { .. } => {
2301                let buffer = buffer.read(cx);
2302                let file = File::from_dyn(buffer.file())?;
2303                let abs_path = file.as_local()?.abs_path(cx);
2304                let uri = lsp::Url::from_file_path(abs_path).unwrap();
2305                let next_snapshot = buffer.text_snapshot();
2306
2307                let language_servers: Vec<_> = self
2308                    .language_servers_for_buffer(buffer, cx)
2309                    .map(|i| i.1.clone())
2310                    .collect();
2311
2312                for language_server in language_servers {
2313                    let language_server = language_server.clone();
2314
2315                    let buffer_snapshots = self
2316                        .buffer_snapshots
2317                        .get_mut(&buffer.remote_id())
2318                        .and_then(|m| m.get_mut(&language_server.server_id()))?;
2319                    let previous_snapshot = buffer_snapshots.last()?;
2320
2321                    let build_incremental_change = || {
2322                        buffer
2323                            .edits_since::<(PointUtf16, usize)>(
2324                                previous_snapshot.snapshot.version(),
2325                            )
2326                            .map(|edit| {
2327                                let edit_start = edit.new.start.0;
2328                                let edit_end = edit_start + (edit.old.end.0 - edit.old.start.0);
2329                                let new_text = next_snapshot
2330                                    .text_for_range(edit.new.start.1..edit.new.end.1)
2331                                    .collect();
2332                                lsp::TextDocumentContentChangeEvent {
2333                                    range: Some(lsp::Range::new(
2334                                        point_to_lsp(edit_start),
2335                                        point_to_lsp(edit_end),
2336                                    )),
2337                                    range_length: None,
2338                                    text: new_text,
2339                                }
2340                            })
2341                            .collect()
2342                    };
2343
2344                    let document_sync_kind = language_server
2345                        .capabilities()
2346                        .text_document_sync
2347                        .as_ref()
2348                        .and_then(|sync| match sync {
2349                            lsp::TextDocumentSyncCapability::Kind(kind) => Some(*kind),
2350                            lsp::TextDocumentSyncCapability::Options(options) => options.change,
2351                        });
2352
2353                    let content_changes: Vec<_> = match document_sync_kind {
2354                        Some(lsp::TextDocumentSyncKind::FULL) => {
2355                            vec![lsp::TextDocumentContentChangeEvent {
2356                                range: None,
2357                                range_length: None,
2358                                text: next_snapshot.text(),
2359                            }]
2360                        }
2361                        Some(lsp::TextDocumentSyncKind::INCREMENTAL) => build_incremental_change(),
2362                        _ => {
2363                            #[cfg(any(test, feature = "test-support"))]
2364                            {
2365                                build_incremental_change()
2366                            }
2367
2368                            #[cfg(not(any(test, feature = "test-support")))]
2369                            {
2370                                continue;
2371                            }
2372                        }
2373                    };
2374
2375                    let next_version = previous_snapshot.version + 1;
2376
2377                    buffer_snapshots.push(LspBufferSnapshot {
2378                        version: next_version,
2379                        snapshot: next_snapshot.clone(),
2380                    });
2381
2382                    language_server
2383                        .notify::<lsp::notification::DidChangeTextDocument>(
2384                            lsp::DidChangeTextDocumentParams {
2385                                text_document: lsp::VersionedTextDocumentIdentifier::new(
2386                                    uri.clone(),
2387                                    next_version,
2388                                ),
2389                                content_changes,
2390                            },
2391                        )
2392                        .log_err();
2393                }
2394            }
2395
2396            BufferEvent::Saved => {
2397                let file = File::from_dyn(buffer.read(cx).file())?;
2398                let worktree_id = file.worktree_id(cx);
2399                let abs_path = file.as_local()?.abs_path(cx);
2400                let text_document = lsp::TextDocumentIdentifier {
2401                    uri: lsp::Url::from_file_path(abs_path).unwrap(),
2402                };
2403
2404                for (_, _, server) in self.language_servers_for_worktree(worktree_id) {
2405                    let text = include_text(server.as_ref()).then(|| buffer.read(cx).text());
2406
2407                    server
2408                        .notify::<lsp::notification::DidSaveTextDocument>(
2409                            lsp::DidSaveTextDocumentParams {
2410                                text_document: text_document.clone(),
2411                                text,
2412                            },
2413                        )
2414                        .log_err();
2415                }
2416
2417                let language_server_ids = self.language_server_ids_for_buffer(buffer.read(cx), cx);
2418                for language_server_id in language_server_ids {
2419                    if let Some(LanguageServerState::Running {
2420                        adapter,
2421                        simulate_disk_based_diagnostics_completion,
2422                        ..
2423                    }) = self.language_servers.get_mut(&language_server_id)
2424                    {
2425                        // After saving a buffer using a language server that doesn't provide
2426                        // a disk-based progress token, kick off a timer that will reset every
2427                        // time the buffer is saved. If the timer eventually fires, simulate
2428                        // disk-based diagnostics being finished so that other pieces of UI
2429                        // (e.g., project diagnostics view, diagnostic status bar) can update.
2430                        // We don't emit an event right away because the language server might take
2431                        // some time to publish diagnostics.
2432                        if adapter.disk_based_diagnostics_progress_token.is_none() {
2433                            const DISK_BASED_DIAGNOSTICS_DEBOUNCE: Duration =
2434                                Duration::from_secs(1);
2435
2436                            let task = cx.spawn(move |this, mut cx| async move {
2437                                cx.background_executor().timer(DISK_BASED_DIAGNOSTICS_DEBOUNCE).await;
2438                                if let Some(this) = this.upgrade() {
2439                                    this.update(&mut cx, |this, cx| {
2440                                        this.disk_based_diagnostics_finished(
2441                                            language_server_id,
2442                                            cx,
2443                                        );
2444                                        this.buffer_ordered_messages_tx
2445                                            .unbounded_send(
2446                                                BufferOrderedMessage::LanguageServerUpdate {
2447                                                    language_server_id,
2448                                                    message:proto::update_language_server::Variant::DiskBasedDiagnosticsUpdated(Default::default())
2449                                                },
2450                                            )
2451                                            .ok();
2452                                    }).ok();
2453                                }
2454                            });
2455                            *simulate_disk_based_diagnostics_completion = Some(task);
2456                        }
2457                    }
2458                }
2459            }
2460            BufferEvent::FileHandleChanged => {
2461                let Some(file) = File::from_dyn(buffer.read(cx).file()) else {
2462                    return None;
2463                };
2464
2465                match self.local_buffer_ids_by_entry_id.get(&file.entry_id) {
2466                    Some(_) => {
2467                        return None;
2468                    }
2469                    None => {
2470                        let remote_id = buffer.read(cx).remote_id();
2471                        self.local_buffer_ids_by_entry_id
2472                            .insert(file.entry_id, remote_id);
2473
2474                        self.local_buffer_ids_by_path.insert(
2475                            ProjectPath {
2476                                worktree_id: file.worktree_id(cx),
2477                                path: file.path.clone(),
2478                            },
2479                            remote_id,
2480                        );
2481                    }
2482                }
2483            }
2484            _ => {}
2485        }
2486
2487        None
2488    }
2489
2490    fn request_buffer_diff_recalculation(
2491        &mut self,
2492        buffer: &Model<Buffer>,
2493        cx: &mut ModelContext<Self>,
2494    ) {
2495        self.buffers_needing_diff.insert(buffer.downgrade());
2496        let first_insertion = self.buffers_needing_diff.len() == 1;
2497
2498        let settings = ProjectSettings::get_global(cx);
2499        let delay = if let Some(delay) = settings.git.gutter_debounce {
2500            delay
2501        } else {
2502            if first_insertion {
2503                let this = cx.weak_model();
2504                cx.defer(move |cx| {
2505                    if let Some(this) = this.upgrade() {
2506                        this.update(cx, |this, cx| {
2507                            this.recalculate_buffer_diffs(cx).detach();
2508                        });
2509                    }
2510                });
2511            }
2512            return;
2513        };
2514
2515        const MIN_DELAY: u64 = 50;
2516        let delay = delay.max(MIN_DELAY);
2517        let duration = Duration::from_millis(delay);
2518
2519        self.git_diff_debouncer
2520            .fire_new(duration, cx, move |this, cx| {
2521                this.recalculate_buffer_diffs(cx)
2522            });
2523    }
2524
2525    fn recalculate_buffer_diffs(&mut self, cx: &mut ModelContext<Self>) -> Task<()> {
2526        let buffers = self.buffers_needing_diff.drain().collect::<Vec<_>>();
2527        cx.spawn(move |this, mut cx| async move {
2528            let tasks: Vec<_> = buffers
2529                .iter()
2530                .filter_map(|buffer| {
2531                    let buffer = buffer.upgrade()?;
2532                    buffer
2533                        .update(&mut cx, |buffer, cx| buffer.git_diff_recalc(cx))
2534                        .ok()
2535                        .flatten()
2536                })
2537                .collect();
2538
2539            futures::future::join_all(tasks).await;
2540
2541            this.update(&mut cx, |this, cx| {
2542                if !this.buffers_needing_diff.is_empty() {
2543                    this.recalculate_buffer_diffs(cx).detach();
2544                } else {
2545                    // TODO: Would a `ModelContext<Project>.notify()` suffice here?
2546                    for buffer in buffers {
2547                        if let Some(buffer) = buffer.upgrade() {
2548                            buffer.update(cx, |_, cx| cx.notify());
2549                        }
2550                    }
2551                }
2552            })
2553            .ok();
2554        })
2555    }
2556
2557    fn language_servers_for_worktree(
2558        &self,
2559        worktree_id: WorktreeId,
2560    ) -> impl Iterator<Item = (&Arc<CachedLspAdapter>, &Arc<Language>, &Arc<LanguageServer>)> {
2561        self.language_server_ids
2562            .iter()
2563            .filter_map(move |((language_server_worktree_id, _), id)| {
2564                if *language_server_worktree_id == worktree_id {
2565                    if let Some(LanguageServerState::Running {
2566                        adapter,
2567                        language,
2568                        server,
2569                        ..
2570                    }) = self.language_servers.get(id)
2571                    {
2572                        return Some((adapter, language, server));
2573                    }
2574                }
2575                None
2576            })
2577    }
2578
2579    fn maintain_buffer_languages(
2580        languages: Arc<LanguageRegistry>,
2581        cx: &mut ModelContext<Project>,
2582    ) -> Task<()> {
2583        let mut subscription = languages.subscribe();
2584        let mut prev_reload_count = languages.reload_count();
2585        cx.spawn(move |project, mut cx| async move {
2586            while let Some(()) = subscription.next().await {
2587                if let Some(project) = project.upgrade() {
2588                    // If the language registry has been reloaded, then remove and
2589                    // re-assign the languages on all open buffers.
2590                    let reload_count = languages.reload_count();
2591                    if reload_count > prev_reload_count {
2592                        prev_reload_count = reload_count;
2593                        project
2594                            .update(&mut cx, |this, cx| {
2595                                let buffers = this
2596                                    .opened_buffers
2597                                    .values()
2598                                    .filter_map(|b| b.upgrade())
2599                                    .collect::<Vec<_>>();
2600                                for buffer in buffers {
2601                                    if let Some(f) = File::from_dyn(buffer.read(cx).file()).cloned()
2602                                    {
2603                                        this.unregister_buffer_from_language_servers(
2604                                            &buffer, &f, cx,
2605                                        );
2606                                        buffer
2607                                            .update(cx, |buffer, cx| buffer.set_language(None, cx));
2608                                    }
2609                                }
2610                            })
2611                            .ok();
2612                    }
2613
2614                    project
2615                        .update(&mut cx, |project, cx| {
2616                            let mut plain_text_buffers = Vec::new();
2617                            let mut buffers_with_unknown_injections = Vec::new();
2618                            for buffer in project.opened_buffers.values() {
2619                                if let Some(handle) = buffer.upgrade() {
2620                                    let buffer = &handle.read(cx);
2621                                    if buffer.language().is_none()
2622                                        || buffer.language() == Some(&*language::PLAIN_TEXT)
2623                                    {
2624                                        plain_text_buffers.push(handle);
2625                                    } else if buffer.contains_unknown_injections() {
2626                                        buffers_with_unknown_injections.push(handle);
2627                                    }
2628                                }
2629                            }
2630
2631                            for buffer in plain_text_buffers {
2632                                project.detect_language_for_buffer(&buffer, cx);
2633                                project.register_buffer_with_language_servers(&buffer, cx);
2634                            }
2635
2636                            for buffer in buffers_with_unknown_injections {
2637                                buffer.update(cx, |buffer, cx| buffer.reparse(cx));
2638                            }
2639                        })
2640                        .ok();
2641                }
2642            }
2643        })
2644    }
2645
2646    fn maintain_workspace_config(cx: &mut ModelContext<Project>) -> Task<Result<()>> {
2647        let (mut settings_changed_tx, mut settings_changed_rx) = watch::channel();
2648        let _ = postage::stream::Stream::try_recv(&mut settings_changed_rx);
2649
2650        let settings_observation = cx.observe_global::<SettingsStore>(move |_, _| {
2651            *settings_changed_tx.borrow_mut() = ();
2652        });
2653
2654        cx.spawn(move |this, mut cx| async move {
2655            while let Some(_) = settings_changed_rx.next().await {
2656                let servers: Vec<_> = this.update(&mut cx, |this, _| {
2657                    this.language_servers
2658                        .values()
2659                        .filter_map(|state| match state {
2660                            LanguageServerState::Starting(_) => None,
2661                            LanguageServerState::Running {
2662                                adapter, server, ..
2663                            } => Some((adapter.clone(), server.clone())),
2664                        })
2665                        .collect()
2666                })?;
2667
2668                for (adapter, server) in servers {
2669                    let workspace_config =
2670                        cx.update(|cx| adapter.workspace_configuration(cx))?.await;
2671                    server
2672                        .notify::<lsp::notification::DidChangeConfiguration>(
2673                            lsp::DidChangeConfigurationParams {
2674                                settings: workspace_config.clone(),
2675                            },
2676                        )
2677                        .ok();
2678                }
2679            }
2680
2681            drop(settings_observation);
2682            anyhow::Ok(())
2683        })
2684    }
2685
2686    fn detect_language_for_buffer(
2687        &mut self,
2688        buffer_handle: &Model<Buffer>,
2689        cx: &mut ModelContext<Self>,
2690    ) -> Option<()> {
2691        // If the buffer has a language, set it and start the language server if we haven't already.
2692        let buffer = buffer_handle.read(cx);
2693        let full_path = buffer.file()?.full_path(cx);
2694        let content = buffer.as_rope();
2695        let new_language = self
2696            .languages
2697            .language_for_file(&full_path, Some(content))
2698            .now_or_never()?
2699            .ok()?;
2700        self.set_language_for_buffer(buffer_handle, new_language, cx);
2701        None
2702    }
2703
2704    pub fn set_language_for_buffer(
2705        &mut self,
2706        buffer: &Model<Buffer>,
2707        new_language: Arc<Language>,
2708        cx: &mut ModelContext<Self>,
2709    ) {
2710        buffer.update(cx, |buffer, cx| {
2711            if buffer.language().map_or(true, |old_language| {
2712                !Arc::ptr_eq(old_language, &new_language)
2713            }) {
2714                buffer.set_language(Some(new_language.clone()), cx);
2715            }
2716        });
2717
2718        let buffer_file = buffer.read(cx).file().cloned();
2719        let settings = language_settings(Some(&new_language), buffer_file.as_ref(), cx).clone();
2720        let buffer_file = File::from_dyn(buffer_file.as_ref());
2721        let worktree = buffer_file.as_ref().map(|f| f.worktree_id(cx));
2722
2723        let task_buffer = buffer.clone();
2724        let prettier_installation_task =
2725            self.install_default_formatters(worktree, &new_language, &settings, cx);
2726        cx.spawn(move |project, mut cx| async move {
2727            prettier_installation_task.await?;
2728            let _ = project
2729                .update(&mut cx, |project, cx| {
2730                    project.prettier_instance_for_buffer(&task_buffer, cx)
2731                })?
2732                .await;
2733            anyhow::Ok(())
2734        })
2735        .detach_and_log_err(cx);
2736
2737        if let Some(file) = buffer_file {
2738            let worktree = file.worktree.clone();
2739            if let Some(tree) = worktree.read(cx).as_local() {
2740                self.start_language_servers(&worktree, tree.abs_path().clone(), new_language, cx);
2741            }
2742        }
2743    }
2744
2745    fn start_language_servers(
2746        &mut self,
2747        worktree: &Model<Worktree>,
2748        worktree_path: Arc<Path>,
2749        language: Arc<Language>,
2750        cx: &mut ModelContext<Self>,
2751    ) {
2752        let root_file = worktree.update(cx, |tree, cx| tree.root_file(cx));
2753        let settings = language_settings(Some(&language), root_file.map(|f| f as _).as_ref(), cx);
2754        if !settings.enable_language_server {
2755            return;
2756        }
2757
2758        let worktree_id = worktree.read(cx).id();
2759        for adapter in language.lsp_adapters() {
2760            self.start_language_server(
2761                worktree_id,
2762                worktree_path.clone(),
2763                adapter.clone(),
2764                language.clone(),
2765                cx,
2766            );
2767        }
2768    }
2769
2770    fn start_language_server(
2771        &mut self,
2772        worktree_id: WorktreeId,
2773        worktree_path: Arc<Path>,
2774        adapter: Arc<CachedLspAdapter>,
2775        language: Arc<Language>,
2776        cx: &mut ModelContext<Self>,
2777    ) {
2778        if adapter.reinstall_attempt_count.load(SeqCst) > MAX_SERVER_REINSTALL_ATTEMPT_COUNT {
2779            return;
2780        }
2781
2782        let key = (worktree_id, adapter.name.clone());
2783        if self.language_server_ids.contains_key(&key) {
2784            return;
2785        }
2786
2787        let stderr_capture = Arc::new(Mutex::new(Some(String::new())));
2788        let pending_server = match self.languages.create_pending_language_server(
2789            stderr_capture.clone(),
2790            language.clone(),
2791            adapter.clone(),
2792            worktree_path,
2793            ProjectLspAdapterDelegate::new(self, cx),
2794            cx,
2795        ) {
2796            Some(pending_server) => pending_server,
2797            None => return,
2798        };
2799
2800        let project_settings = ProjectSettings::get_global(cx);
2801        let lsp = project_settings.lsp.get(&adapter.name.0);
2802        let override_options = lsp.map(|s| s.initialization_options.clone()).flatten();
2803
2804        let mut initialization_options = adapter.initialization_options.clone();
2805        match (&mut initialization_options, override_options) {
2806            (Some(initialization_options), Some(override_options)) => {
2807                merge_json_value_into(override_options, initialization_options);
2808            }
2809            (None, override_options) => initialization_options = override_options,
2810            _ => {}
2811        }
2812
2813        let server_id = pending_server.server_id;
2814        let container_dir = pending_server.container_dir.clone();
2815        let state = LanguageServerState::Starting({
2816            let adapter = adapter.clone();
2817            let server_name = adapter.name.0.clone();
2818            let language = language.clone();
2819            let key = key.clone();
2820
2821            cx.spawn(move |this, mut cx| async move {
2822                let result = Self::setup_and_insert_language_server(
2823                    this.clone(),
2824                    initialization_options,
2825                    pending_server,
2826                    adapter.clone(),
2827                    language.clone(),
2828                    server_id,
2829                    key,
2830                    &mut cx,
2831                )
2832                .await;
2833
2834                match result {
2835                    Ok(server) => {
2836                        stderr_capture.lock().take();
2837                        server
2838                    }
2839
2840                    Err(err) => {
2841                        log::error!("failed to start language server {server_name:?}: {err}");
2842                        log::error!("server stderr: {:?}", stderr_capture.lock().take());
2843
2844                        let this = this.upgrade()?;
2845                        let container_dir = container_dir?;
2846
2847                        let attempt_count = adapter.reinstall_attempt_count.fetch_add(1, SeqCst);
2848                        if attempt_count >= MAX_SERVER_REINSTALL_ATTEMPT_COUNT {
2849                            let max = MAX_SERVER_REINSTALL_ATTEMPT_COUNT;
2850                            log::error!("Hit {max} reinstallation attempts for {server_name:?}");
2851                            return None;
2852                        }
2853
2854                        let installation_test_binary = adapter
2855                            .installation_test_binary(container_dir.to_path_buf())
2856                            .await;
2857
2858                        this.update(&mut cx, |_, cx| {
2859                            Self::check_errored_server(
2860                                language,
2861                                adapter,
2862                                server_id,
2863                                installation_test_binary,
2864                                cx,
2865                            )
2866                        })
2867                        .ok();
2868
2869                        None
2870                    }
2871                }
2872            })
2873        });
2874
2875        self.language_servers.insert(server_id, state);
2876        self.language_server_ids.insert(key, server_id);
2877    }
2878
2879    fn reinstall_language_server(
2880        &mut self,
2881        language: Arc<Language>,
2882        adapter: Arc<CachedLspAdapter>,
2883        server_id: LanguageServerId,
2884        cx: &mut ModelContext<Self>,
2885    ) -> Option<Task<()>> {
2886        log::info!("beginning to reinstall server");
2887
2888        let existing_server = match self.language_servers.remove(&server_id) {
2889            Some(LanguageServerState::Running { server, .. }) => Some(server),
2890            _ => None,
2891        };
2892
2893        for worktree in &self.worktrees {
2894            if let Some(worktree) = worktree.upgrade() {
2895                let key = (worktree.read(cx).id(), adapter.name.clone());
2896                self.language_server_ids.remove(&key);
2897            }
2898        }
2899
2900        Some(cx.spawn(move |this, mut cx| async move {
2901            if let Some(task) = existing_server.and_then(|server| server.shutdown()) {
2902                log::info!("shutting down existing server");
2903                task.await;
2904            }
2905
2906            // TODO: This is race-safe with regards to preventing new instances from
2907            // starting while deleting, but existing instances in other projects are going
2908            // to be very confused and messed up
2909            let Some(task) = this
2910                .update(&mut cx, |this, cx| {
2911                    this.languages.delete_server_container(adapter.clone(), cx)
2912                })
2913                .log_err()
2914            else {
2915                return;
2916            };
2917            task.await;
2918
2919            this.update(&mut cx, |this, mut cx| {
2920                let worktrees = this.worktrees.clone();
2921                for worktree in worktrees {
2922                    let worktree = match worktree.upgrade() {
2923                        Some(worktree) => worktree.read(cx),
2924                        None => continue,
2925                    };
2926                    let worktree_id = worktree.id();
2927                    let root_path = worktree.abs_path();
2928
2929                    this.start_language_server(
2930                        worktree_id,
2931                        root_path,
2932                        adapter.clone(),
2933                        language.clone(),
2934                        &mut cx,
2935                    );
2936                }
2937            })
2938            .ok();
2939        }))
2940    }
2941
2942    async fn setup_and_insert_language_server(
2943        this: WeakModel<Self>,
2944        initialization_options: Option<serde_json::Value>,
2945        pending_server: PendingLanguageServer,
2946        adapter: Arc<CachedLspAdapter>,
2947        language: Arc<Language>,
2948        server_id: LanguageServerId,
2949        key: (WorktreeId, LanguageServerName),
2950        cx: &mut AsyncAppContext,
2951    ) -> Result<Option<Arc<LanguageServer>>> {
2952        let language_server = Self::setup_pending_language_server(
2953            this.clone(),
2954            initialization_options,
2955            pending_server,
2956            adapter.clone(),
2957            server_id,
2958            cx,
2959        )
2960        .await?;
2961
2962        let this = match this.upgrade() {
2963            Some(this) => this,
2964            None => return Err(anyhow!("failed to upgrade project handle")),
2965        };
2966
2967        this.update(cx, |this, cx| {
2968            this.insert_newly_running_language_server(
2969                language,
2970                adapter,
2971                language_server.clone(),
2972                server_id,
2973                key,
2974                cx,
2975            )
2976        })??;
2977
2978        Ok(Some(language_server))
2979    }
2980
2981    async fn setup_pending_language_server(
2982        this: WeakModel<Self>,
2983        initialization_options: Option<serde_json::Value>,
2984        pending_server: PendingLanguageServer,
2985        adapter: Arc<CachedLspAdapter>,
2986        server_id: LanguageServerId,
2987        cx: &mut AsyncAppContext,
2988    ) -> Result<Arc<LanguageServer>> {
2989        let workspace_config = cx.update(|cx| adapter.workspace_configuration(cx))?.await;
2990        let language_server = pending_server.task.await?;
2991
2992        language_server
2993            .on_notification::<lsp::notification::PublishDiagnostics, _>({
2994                let adapter = adapter.clone();
2995                let this = this.clone();
2996                move |mut params, mut cx| {
2997                    let adapter = adapter.clone();
2998                    if let Some(this) = this.upgrade() {
2999                        adapter.process_diagnostics(&mut params);
3000                        this.update(&mut cx, |this, cx| {
3001                            this.update_diagnostics(
3002                                server_id,
3003                                params,
3004                                &adapter.disk_based_diagnostic_sources,
3005                                cx,
3006                            )
3007                            .log_err();
3008                        })
3009                        .ok();
3010                    }
3011                }
3012            })
3013            .detach();
3014
3015        language_server
3016            .on_request::<lsp::request::WorkspaceConfiguration, _, _>({
3017                let adapter = adapter.clone();
3018                move |params, cx| {
3019                    let adapter = adapter.clone();
3020                    async move {
3021                        let workspace_config =
3022                            cx.update(|cx| adapter.workspace_configuration(cx))?.await;
3023                        Ok(params
3024                            .items
3025                            .into_iter()
3026                            .map(|item| {
3027                                if let Some(section) = &item.section {
3028                                    workspace_config
3029                                        .get(section)
3030                                        .cloned()
3031                                        .unwrap_or(serde_json::Value::Null)
3032                                } else {
3033                                    workspace_config.clone()
3034                                }
3035                            })
3036                            .collect())
3037                    }
3038                }
3039            })
3040            .detach();
3041
3042        // Even though we don't have handling for these requests, respond to them to
3043        // avoid stalling any language server like `gopls` which waits for a response
3044        // to these requests when initializing.
3045        language_server
3046            .on_request::<lsp::request::WorkDoneProgressCreate, _, _>({
3047                let this = this.clone();
3048                move |params, mut cx| {
3049                    let this = this.clone();
3050                    async move {
3051                        this.update(&mut cx, |this, _| {
3052                            if let Some(status) = this.language_server_statuses.get_mut(&server_id)
3053                            {
3054                                if let lsp::NumberOrString::String(token) = params.token {
3055                                    status.progress_tokens.insert(token);
3056                                }
3057                            }
3058                        })?;
3059
3060                        Ok(())
3061                    }
3062                }
3063            })
3064            .detach();
3065
3066        language_server
3067            .on_request::<lsp::request::RegisterCapability, _, _>({
3068                let this = this.clone();
3069                move |params, mut cx| {
3070                    let this = this.clone();
3071                    async move {
3072                        for reg in params.registrations {
3073                            if reg.method == "workspace/didChangeWatchedFiles" {
3074                                if let Some(options) = reg.register_options {
3075                                    let options = serde_json::from_value(options)?;
3076                                    this.update(&mut cx, |this, cx| {
3077                                        this.on_lsp_did_change_watched_files(
3078                                            server_id, options, cx,
3079                                        );
3080                                    })?;
3081                                }
3082                            }
3083                        }
3084                        Ok(())
3085                    }
3086                }
3087            })
3088            .detach();
3089
3090        language_server
3091            .on_request::<lsp::request::ApplyWorkspaceEdit, _, _>({
3092                let adapter = adapter.clone();
3093                let this = this.clone();
3094                move |params, cx| {
3095                    Self::on_lsp_workspace_edit(
3096                        this.clone(),
3097                        params,
3098                        server_id,
3099                        adapter.clone(),
3100                        cx,
3101                    )
3102                }
3103            })
3104            .detach();
3105
3106        language_server
3107            .on_request::<lsp::request::InlayHintRefreshRequest, _, _>({
3108                let this = this.clone();
3109                move |(), mut cx| {
3110                    let this = this.clone();
3111                    async move {
3112                        this.update(&mut cx, |project, cx| {
3113                            cx.emit(Event::RefreshInlayHints);
3114                            project.remote_id().map(|project_id| {
3115                                project.client.send(proto::RefreshInlayHints { project_id })
3116                            })
3117                        })?
3118                        .transpose()?;
3119                        Ok(())
3120                    }
3121                }
3122            })
3123            .detach();
3124
3125        let disk_based_diagnostics_progress_token =
3126            adapter.disk_based_diagnostics_progress_token.clone();
3127
3128        language_server
3129            .on_notification::<lsp::notification::Progress, _>(move |params, mut cx| {
3130                if let Some(this) = this.upgrade() {
3131                    this.update(&mut cx, |this, cx| {
3132                        this.on_lsp_progress(
3133                            params,
3134                            server_id,
3135                            disk_based_diagnostics_progress_token.clone(),
3136                            cx,
3137                        );
3138                    })
3139                    .ok();
3140                }
3141            })
3142            .detach();
3143
3144        let language_server = language_server.initialize(initialization_options).await?;
3145
3146        language_server
3147            .notify::<lsp::notification::DidChangeConfiguration>(
3148                lsp::DidChangeConfigurationParams {
3149                    settings: workspace_config,
3150                },
3151            )
3152            .ok();
3153
3154        Ok(language_server)
3155    }
3156
3157    fn insert_newly_running_language_server(
3158        &mut self,
3159        language: Arc<Language>,
3160        adapter: Arc<CachedLspAdapter>,
3161        language_server: Arc<LanguageServer>,
3162        server_id: LanguageServerId,
3163        key: (WorktreeId, LanguageServerName),
3164        cx: &mut ModelContext<Self>,
3165    ) -> Result<()> {
3166        // If the language server for this key doesn't match the server id, don't store the
3167        // server. Which will cause it to be dropped, killing the process
3168        if self
3169            .language_server_ids
3170            .get(&key)
3171            .map(|id| id != &server_id)
3172            .unwrap_or(false)
3173        {
3174            return Ok(());
3175        }
3176
3177        // Update language_servers collection with Running variant of LanguageServerState
3178        // indicating that the server is up and running and ready
3179        self.language_servers.insert(
3180            server_id,
3181            LanguageServerState::Running {
3182                adapter: adapter.clone(),
3183                language: language.clone(),
3184                watched_paths: Default::default(),
3185                server: language_server.clone(),
3186                simulate_disk_based_diagnostics_completion: None,
3187            },
3188        );
3189
3190        self.language_server_statuses.insert(
3191            server_id,
3192            LanguageServerStatus {
3193                name: language_server.name().to_string(),
3194                pending_work: Default::default(),
3195                has_pending_diagnostic_updates: false,
3196                progress_tokens: Default::default(),
3197            },
3198        );
3199
3200        cx.emit(Event::LanguageServerAdded(server_id));
3201
3202        if let Some(project_id) = self.remote_id() {
3203            self.client.send(proto::StartLanguageServer {
3204                project_id,
3205                server: Some(proto::LanguageServer {
3206                    id: server_id.0 as u64,
3207                    name: language_server.name().to_string(),
3208                }),
3209            })?;
3210        }
3211
3212        // Tell the language server about every open buffer in the worktree that matches the language.
3213        for buffer in self.opened_buffers.values() {
3214            if let Some(buffer_handle) = buffer.upgrade() {
3215                let buffer = buffer_handle.read(cx);
3216                let file = match File::from_dyn(buffer.file()) {
3217                    Some(file) => file,
3218                    None => continue,
3219                };
3220                let language = match buffer.language() {
3221                    Some(language) => language,
3222                    None => continue,
3223                };
3224
3225                if file.worktree.read(cx).id() != key.0
3226                    || !language.lsp_adapters().iter().any(|a| a.name == key.1)
3227                {
3228                    continue;
3229                }
3230
3231                let file = match file.as_local() {
3232                    Some(file) => file,
3233                    None => continue,
3234                };
3235
3236                let versions = self
3237                    .buffer_snapshots
3238                    .entry(buffer.remote_id())
3239                    .or_default()
3240                    .entry(server_id)
3241                    .or_insert_with(|| {
3242                        vec![LspBufferSnapshot {
3243                            version: 0,
3244                            snapshot: buffer.text_snapshot(),
3245                        }]
3246                    });
3247
3248                let snapshot = versions.last().unwrap();
3249                let version = snapshot.version;
3250                let initial_snapshot = &snapshot.snapshot;
3251                let uri = lsp::Url::from_file_path(file.abs_path(cx)).unwrap();
3252                language_server.notify::<lsp::notification::DidOpenTextDocument>(
3253                    lsp::DidOpenTextDocumentParams {
3254                        text_document: lsp::TextDocumentItem::new(
3255                            uri,
3256                            adapter
3257                                .language_ids
3258                                .get(language.name().as_ref())
3259                                .cloned()
3260                                .unwrap_or_default(),
3261                            version,
3262                            initial_snapshot.text(),
3263                        ),
3264                    },
3265                )?;
3266
3267                buffer_handle.update(cx, |buffer, cx| {
3268                    buffer.set_completion_triggers(
3269                        language_server
3270                            .capabilities()
3271                            .completion_provider
3272                            .as_ref()
3273                            .and_then(|provider| provider.trigger_characters.clone())
3274                            .unwrap_or_default(),
3275                        cx,
3276                    )
3277                });
3278            }
3279        }
3280
3281        cx.notify();
3282        Ok(())
3283    }
3284
3285    // Returns a list of all of the worktrees which no longer have a language server and the root path
3286    // for the stopped server
3287    fn stop_language_server(
3288        &mut self,
3289        worktree_id: WorktreeId,
3290        adapter_name: LanguageServerName,
3291        cx: &mut ModelContext<Self>,
3292    ) -> Task<(Option<PathBuf>, Vec<WorktreeId>)> {
3293        let key = (worktree_id, adapter_name);
3294        if let Some(server_id) = self.language_server_ids.remove(&key) {
3295            log::info!("stopping language server {}", key.1 .0);
3296
3297            // Remove other entries for this language server as well
3298            let mut orphaned_worktrees = vec![worktree_id];
3299            let other_keys = self.language_server_ids.keys().cloned().collect::<Vec<_>>();
3300            for other_key in other_keys {
3301                if self.language_server_ids.get(&other_key) == Some(&server_id) {
3302                    self.language_server_ids.remove(&other_key);
3303                    orphaned_worktrees.push(other_key.0);
3304                }
3305            }
3306
3307            for buffer in self.opened_buffers.values() {
3308                if let Some(buffer) = buffer.upgrade() {
3309                    buffer.update(cx, |buffer, cx| {
3310                        buffer.update_diagnostics(server_id, Default::default(), cx);
3311                    });
3312                }
3313            }
3314            for worktree in &self.worktrees {
3315                if let Some(worktree) = worktree.upgrade() {
3316                    worktree.update(cx, |worktree, cx| {
3317                        if let Some(worktree) = worktree.as_local_mut() {
3318                            worktree.clear_diagnostics_for_language_server(server_id, cx);
3319                        }
3320                    });
3321                }
3322            }
3323
3324            self.language_server_statuses.remove(&server_id);
3325            cx.notify();
3326
3327            let server_state = self.language_servers.remove(&server_id);
3328            cx.emit(Event::LanguageServerRemoved(server_id));
3329            cx.spawn(move |this, mut cx| async move {
3330                let mut root_path = None;
3331
3332                let server = match server_state {
3333                    Some(LanguageServerState::Starting(task)) => task.await,
3334                    Some(LanguageServerState::Running { server, .. }) => Some(server),
3335                    None => None,
3336                };
3337
3338                if let Some(server) = server {
3339                    root_path = Some(server.root_path().clone());
3340                    if let Some(shutdown) = server.shutdown() {
3341                        shutdown.await;
3342                    }
3343                }
3344
3345                if let Some(this) = this.upgrade() {
3346                    this.update(&mut cx, |this, cx| {
3347                        this.language_server_statuses.remove(&server_id);
3348                        cx.notify();
3349                    })
3350                    .ok();
3351                }
3352
3353                (root_path, orphaned_worktrees)
3354            })
3355        } else {
3356            Task::ready((None, Vec::new()))
3357        }
3358    }
3359
3360    pub fn restart_language_servers_for_buffers(
3361        &mut self,
3362        buffers: impl IntoIterator<Item = Model<Buffer>>,
3363        cx: &mut ModelContext<Self>,
3364    ) -> Option<()> {
3365        let language_server_lookup_info: HashSet<(Model<Worktree>, Arc<Language>)> = buffers
3366            .into_iter()
3367            .filter_map(|buffer| {
3368                let buffer = buffer.read(cx);
3369                let file = File::from_dyn(buffer.file())?;
3370                let full_path = file.full_path(cx);
3371                let language = self
3372                    .languages
3373                    .language_for_file(&full_path, Some(buffer.as_rope()))
3374                    .now_or_never()?
3375                    .ok()?;
3376                Some((file.worktree.clone(), language))
3377            })
3378            .collect();
3379        for (worktree, language) in language_server_lookup_info {
3380            self.restart_language_servers(worktree, language, cx);
3381        }
3382
3383        None
3384    }
3385
3386    // TODO This will break in the case where the adapter's root paths and worktrees are not equal
3387    fn restart_language_servers(
3388        &mut self,
3389        worktree: Model<Worktree>,
3390        language: Arc<Language>,
3391        cx: &mut ModelContext<Self>,
3392    ) {
3393        let worktree_id = worktree.read(cx).id();
3394        let fallback_path = worktree.read(cx).abs_path();
3395
3396        let mut stops = Vec::new();
3397        for adapter in language.lsp_adapters() {
3398            stops.push(self.stop_language_server(worktree_id, adapter.name.clone(), cx));
3399        }
3400
3401        if stops.is_empty() {
3402            return;
3403        }
3404        let mut stops = stops.into_iter();
3405
3406        cx.spawn(move |this, mut cx| async move {
3407            let (original_root_path, mut orphaned_worktrees) = stops.next().unwrap().await;
3408            for stop in stops {
3409                let (_, worktrees) = stop.await;
3410                orphaned_worktrees.extend_from_slice(&worktrees);
3411            }
3412
3413            let this = match this.upgrade() {
3414                Some(this) => this,
3415                None => return,
3416            };
3417
3418            this.update(&mut cx, |this, cx| {
3419                // Attempt to restart using original server path. Fallback to passed in
3420                // path if we could not retrieve the root path
3421                let root_path = original_root_path
3422                    .map(|path_buf| Arc::from(path_buf.as_path()))
3423                    .unwrap_or(fallback_path);
3424
3425                this.start_language_servers(&worktree, root_path, language.clone(), cx);
3426
3427                // Lookup new server ids and set them for each of the orphaned worktrees
3428                for adapter in language.lsp_adapters() {
3429                    if let Some(new_server_id) = this
3430                        .language_server_ids
3431                        .get(&(worktree_id, adapter.name.clone()))
3432                        .cloned()
3433                    {
3434                        for &orphaned_worktree in &orphaned_worktrees {
3435                            this.language_server_ids
3436                                .insert((orphaned_worktree, adapter.name.clone()), new_server_id);
3437                        }
3438                    }
3439                }
3440            })
3441            .ok();
3442        })
3443        .detach();
3444    }
3445
3446    fn check_errored_server(
3447        language: Arc<Language>,
3448        adapter: Arc<CachedLspAdapter>,
3449        server_id: LanguageServerId,
3450        installation_test_binary: Option<LanguageServerBinary>,
3451        cx: &mut ModelContext<Self>,
3452    ) {
3453        if !adapter.can_be_reinstalled() {
3454            log::info!(
3455                "Validation check requested for {:?} but it cannot be reinstalled",
3456                adapter.name.0
3457            );
3458            return;
3459        }
3460
3461        cx.spawn(move |this, mut cx| async move {
3462            log::info!("About to spawn test binary");
3463
3464            // A lack of test binary counts as a failure
3465            let process = installation_test_binary.and_then(|binary| {
3466                smol::process::Command::new(&binary.path)
3467                    .current_dir(&binary.path)
3468                    .args(binary.arguments)
3469                    .stdin(Stdio::piped())
3470                    .stdout(Stdio::piped())
3471                    .stderr(Stdio::inherit())
3472                    .kill_on_drop(true)
3473                    .spawn()
3474                    .ok()
3475            });
3476
3477            const PROCESS_TIMEOUT: Duration = Duration::from_secs(5);
3478            let mut timeout = cx.background_executor().timer(PROCESS_TIMEOUT).fuse();
3479
3480            let mut errored = false;
3481            if let Some(mut process) = process {
3482                futures::select! {
3483                    status = process.status().fuse() => match status {
3484                        Ok(status) => errored = !status.success(),
3485                        Err(_) => errored = true,
3486                    },
3487
3488                    _ = timeout => {
3489                        log::info!("test binary time-ed out, this counts as a success");
3490                        _ = process.kill();
3491                    }
3492                }
3493            } else {
3494                log::warn!("test binary failed to launch");
3495                errored = true;
3496            }
3497
3498            if errored {
3499                log::warn!("test binary check failed");
3500                let task = this
3501                    .update(&mut cx, move |this, mut cx| {
3502                        this.reinstall_language_server(language, adapter, server_id, &mut cx)
3503                    })
3504                    .ok()
3505                    .flatten();
3506
3507                if let Some(task) = task {
3508                    task.await;
3509                }
3510            }
3511        })
3512        .detach();
3513    }
3514
3515    fn on_lsp_progress(
3516        &mut self,
3517        progress: lsp::ProgressParams,
3518        language_server_id: LanguageServerId,
3519        disk_based_diagnostics_progress_token: Option<String>,
3520        cx: &mut ModelContext<Self>,
3521    ) {
3522        let token = match progress.token {
3523            lsp::NumberOrString::String(token) => token,
3524            lsp::NumberOrString::Number(token) => {
3525                log::info!("skipping numeric progress token {}", token);
3526                return;
3527            }
3528        };
3529        let lsp::ProgressParamsValue::WorkDone(progress) = progress.value;
3530        let language_server_status =
3531            if let Some(status) = self.language_server_statuses.get_mut(&language_server_id) {
3532                status
3533            } else {
3534                return;
3535            };
3536
3537        if !language_server_status.progress_tokens.contains(&token) {
3538            return;
3539        }
3540
3541        let is_disk_based_diagnostics_progress = disk_based_diagnostics_progress_token
3542            .as_ref()
3543            .map_or(false, |disk_based_token| {
3544                token.starts_with(disk_based_token)
3545            });
3546
3547        match progress {
3548            lsp::WorkDoneProgress::Begin(report) => {
3549                if is_disk_based_diagnostics_progress {
3550                    language_server_status.has_pending_diagnostic_updates = true;
3551                    self.disk_based_diagnostics_started(language_server_id, cx);
3552                    self.buffer_ordered_messages_tx
3553                        .unbounded_send(BufferOrderedMessage::LanguageServerUpdate {
3554                            language_server_id,
3555                            message: proto::update_language_server::Variant::DiskBasedDiagnosticsUpdating(Default::default())
3556                        })
3557                        .ok();
3558                } else {
3559                    self.on_lsp_work_start(
3560                        language_server_id,
3561                        token.clone(),
3562                        LanguageServerProgress {
3563                            message: report.message.clone(),
3564                            percentage: report.percentage.map(|p| p as usize),
3565                            last_update_at: Instant::now(),
3566                        },
3567                        cx,
3568                    );
3569                    self.buffer_ordered_messages_tx
3570                        .unbounded_send(BufferOrderedMessage::LanguageServerUpdate {
3571                            language_server_id,
3572                            message: proto::update_language_server::Variant::WorkStart(
3573                                proto::LspWorkStart {
3574                                    token,
3575                                    message: report.message,
3576                                    percentage: report.percentage.map(|p| p as u32),
3577                                },
3578                            ),
3579                        })
3580                        .ok();
3581                }
3582            }
3583            lsp::WorkDoneProgress::Report(report) => {
3584                if !is_disk_based_diagnostics_progress {
3585                    self.on_lsp_work_progress(
3586                        language_server_id,
3587                        token.clone(),
3588                        LanguageServerProgress {
3589                            message: report.message.clone(),
3590                            percentage: report.percentage.map(|p| p as usize),
3591                            last_update_at: Instant::now(),
3592                        },
3593                        cx,
3594                    );
3595                    self.buffer_ordered_messages_tx
3596                        .unbounded_send(BufferOrderedMessage::LanguageServerUpdate {
3597                            language_server_id,
3598                            message: proto::update_language_server::Variant::WorkProgress(
3599                                proto::LspWorkProgress {
3600                                    token,
3601                                    message: report.message,
3602                                    percentage: report.percentage.map(|p| p as u32),
3603                                },
3604                            ),
3605                        })
3606                        .ok();
3607                }
3608            }
3609            lsp::WorkDoneProgress::End(_) => {
3610                language_server_status.progress_tokens.remove(&token);
3611
3612                if is_disk_based_diagnostics_progress {
3613                    language_server_status.has_pending_diagnostic_updates = false;
3614                    self.disk_based_diagnostics_finished(language_server_id, cx);
3615                    self.buffer_ordered_messages_tx
3616                        .unbounded_send(BufferOrderedMessage::LanguageServerUpdate {
3617                            language_server_id,
3618                            message:
3619                                proto::update_language_server::Variant::DiskBasedDiagnosticsUpdated(
3620                                    Default::default(),
3621                                ),
3622                        })
3623                        .ok();
3624                } else {
3625                    self.on_lsp_work_end(language_server_id, token.clone(), cx);
3626                    self.buffer_ordered_messages_tx
3627                        .unbounded_send(BufferOrderedMessage::LanguageServerUpdate {
3628                            language_server_id,
3629                            message: proto::update_language_server::Variant::WorkEnd(
3630                                proto::LspWorkEnd { token },
3631                            ),
3632                        })
3633                        .ok();
3634                }
3635            }
3636        }
3637    }
3638
3639    fn on_lsp_work_start(
3640        &mut self,
3641        language_server_id: LanguageServerId,
3642        token: String,
3643        progress: LanguageServerProgress,
3644        cx: &mut ModelContext<Self>,
3645    ) {
3646        if let Some(status) = self.language_server_statuses.get_mut(&language_server_id) {
3647            status.pending_work.insert(token, progress);
3648            cx.notify();
3649        }
3650    }
3651
3652    fn on_lsp_work_progress(
3653        &mut self,
3654        language_server_id: LanguageServerId,
3655        token: String,
3656        progress: LanguageServerProgress,
3657        cx: &mut ModelContext<Self>,
3658    ) {
3659        if let Some(status) = self.language_server_statuses.get_mut(&language_server_id) {
3660            let entry = status
3661                .pending_work
3662                .entry(token)
3663                .or_insert(LanguageServerProgress {
3664                    message: Default::default(),
3665                    percentage: Default::default(),
3666                    last_update_at: progress.last_update_at,
3667                });
3668            if progress.message.is_some() {
3669                entry.message = progress.message;
3670            }
3671            if progress.percentage.is_some() {
3672                entry.percentage = progress.percentage;
3673            }
3674            entry.last_update_at = progress.last_update_at;
3675            cx.notify();
3676        }
3677    }
3678
3679    fn on_lsp_work_end(
3680        &mut self,
3681        language_server_id: LanguageServerId,
3682        token: String,
3683        cx: &mut ModelContext<Self>,
3684    ) {
3685        if let Some(status) = self.language_server_statuses.get_mut(&language_server_id) {
3686            cx.emit(Event::RefreshInlayHints);
3687            status.pending_work.remove(&token);
3688            cx.notify();
3689        }
3690    }
3691
3692    fn on_lsp_did_change_watched_files(
3693        &mut self,
3694        language_server_id: LanguageServerId,
3695        params: DidChangeWatchedFilesRegistrationOptions,
3696        cx: &mut ModelContext<Self>,
3697    ) {
3698        if let Some(LanguageServerState::Running { watched_paths, .. }) =
3699            self.language_servers.get_mut(&language_server_id)
3700        {
3701            let mut builders = HashMap::default();
3702            for watcher in params.watchers {
3703                for worktree in &self.worktrees {
3704                    if let Some(worktree) = worktree.upgrade() {
3705                        let glob_is_inside_worktree = worktree.update(cx, |tree, _| {
3706                            if let Some(abs_path) = tree.abs_path().to_str() {
3707                                let relative_glob_pattern = match &watcher.glob_pattern {
3708                                    lsp::GlobPattern::String(s) => s
3709                                        .strip_prefix(abs_path)
3710                                        .and_then(|s| s.strip_prefix(std::path::MAIN_SEPARATOR)),
3711                                    lsp::GlobPattern::Relative(rp) => {
3712                                        let base_uri = match &rp.base_uri {
3713                                            lsp::OneOf::Left(workspace_folder) => {
3714                                                &workspace_folder.uri
3715                                            }
3716                                            lsp::OneOf::Right(base_uri) => base_uri,
3717                                        };
3718                                        base_uri.to_file_path().ok().and_then(|file_path| {
3719                                            (file_path.to_str() == Some(abs_path))
3720                                                .then_some(rp.pattern.as_str())
3721                                        })
3722                                    }
3723                                };
3724                                if let Some(relative_glob_pattern) = relative_glob_pattern {
3725                                    let literal_prefix =
3726                                        glob_literal_prefix(&relative_glob_pattern);
3727                                    tree.as_local_mut()
3728                                        .unwrap()
3729                                        .add_path_prefix_to_scan(Path::new(literal_prefix).into());
3730                                    if let Some(glob) = Glob::new(relative_glob_pattern).log_err() {
3731                                        builders
3732                                            .entry(tree.id())
3733                                            .or_insert_with(|| GlobSetBuilder::new())
3734                                            .add(glob);
3735                                    }
3736                                    return true;
3737                                }
3738                            }
3739                            false
3740                        });
3741                        if glob_is_inside_worktree {
3742                            break;
3743                        }
3744                    }
3745                }
3746            }
3747
3748            watched_paths.clear();
3749            for (worktree_id, builder) in builders {
3750                if let Ok(globset) = builder.build() {
3751                    watched_paths.insert(worktree_id, globset);
3752                }
3753            }
3754
3755            cx.notify();
3756        }
3757    }
3758
3759    async fn on_lsp_workspace_edit(
3760        this: WeakModel<Self>,
3761        params: lsp::ApplyWorkspaceEditParams,
3762        server_id: LanguageServerId,
3763        adapter: Arc<CachedLspAdapter>,
3764        mut cx: AsyncAppContext,
3765    ) -> Result<lsp::ApplyWorkspaceEditResponse> {
3766        let this = this
3767            .upgrade()
3768            .ok_or_else(|| anyhow!("project project closed"))?;
3769        let language_server = this
3770            .update(&mut cx, |this, _| this.language_server_for_id(server_id))?
3771            .ok_or_else(|| anyhow!("language server not found"))?;
3772        let transaction = Self::deserialize_workspace_edit(
3773            this.clone(),
3774            params.edit,
3775            true,
3776            adapter.clone(),
3777            language_server.clone(),
3778            &mut cx,
3779        )
3780        .await
3781        .log_err();
3782        this.update(&mut cx, |this, _| {
3783            if let Some(transaction) = transaction {
3784                this.last_workspace_edits_by_language_server
3785                    .insert(server_id, transaction);
3786            }
3787        })?;
3788        Ok(lsp::ApplyWorkspaceEditResponse {
3789            applied: true,
3790            failed_change: None,
3791            failure_reason: None,
3792        })
3793    }
3794
3795    pub fn language_server_statuses(
3796        &self,
3797    ) -> impl DoubleEndedIterator<Item = &LanguageServerStatus> {
3798        self.language_server_statuses.values()
3799    }
3800
3801    pub fn update_diagnostics(
3802        &mut self,
3803        language_server_id: LanguageServerId,
3804        mut params: lsp::PublishDiagnosticsParams,
3805        disk_based_sources: &[String],
3806        cx: &mut ModelContext<Self>,
3807    ) -> Result<()> {
3808        let abs_path = params
3809            .uri
3810            .to_file_path()
3811            .map_err(|_| anyhow!("URI is not a file"))?;
3812        let mut diagnostics = Vec::default();
3813        let mut primary_diagnostic_group_ids = HashMap::default();
3814        let mut sources_by_group_id = HashMap::default();
3815        let mut supporting_diagnostics = HashMap::default();
3816
3817        // Ensure that primary diagnostics are always the most severe
3818        params.diagnostics.sort_by_key(|item| item.severity);
3819
3820        for diagnostic in &params.diagnostics {
3821            let source = diagnostic.source.as_ref();
3822            let code = diagnostic.code.as_ref().map(|code| match code {
3823                lsp::NumberOrString::Number(code) => code.to_string(),
3824                lsp::NumberOrString::String(code) => code.clone(),
3825            });
3826            let range = range_from_lsp(diagnostic.range);
3827            let is_supporting = diagnostic
3828                .related_information
3829                .as_ref()
3830                .map_or(false, |infos| {
3831                    infos.iter().any(|info| {
3832                        primary_diagnostic_group_ids.contains_key(&(
3833                            source,
3834                            code.clone(),
3835                            range_from_lsp(info.location.range),
3836                        ))
3837                    })
3838                });
3839
3840            let is_unnecessary = diagnostic.tags.as_ref().map_or(false, |tags| {
3841                tags.iter().any(|tag| *tag == DiagnosticTag::UNNECESSARY)
3842            });
3843
3844            if is_supporting {
3845                supporting_diagnostics.insert(
3846                    (source, code.clone(), range),
3847                    (diagnostic.severity, is_unnecessary),
3848                );
3849            } else {
3850                let group_id = post_inc(&mut self.next_diagnostic_group_id);
3851                let is_disk_based =
3852                    source.map_or(false, |source| disk_based_sources.contains(source));
3853
3854                sources_by_group_id.insert(group_id, source);
3855                primary_diagnostic_group_ids
3856                    .insert((source, code.clone(), range.clone()), group_id);
3857
3858                diagnostics.push(DiagnosticEntry {
3859                    range,
3860                    diagnostic: Diagnostic {
3861                        source: diagnostic.source.clone(),
3862                        code: code.clone(),
3863                        severity: diagnostic.severity.unwrap_or(DiagnosticSeverity::ERROR),
3864                        message: diagnostic.message.clone(),
3865                        group_id,
3866                        is_primary: true,
3867                        is_valid: true,
3868                        is_disk_based,
3869                        is_unnecessary,
3870                    },
3871                });
3872                if let Some(infos) = &diagnostic.related_information {
3873                    for info in infos {
3874                        if info.location.uri == params.uri && !info.message.is_empty() {
3875                            let range = range_from_lsp(info.location.range);
3876                            diagnostics.push(DiagnosticEntry {
3877                                range,
3878                                diagnostic: Diagnostic {
3879                                    source: diagnostic.source.clone(),
3880                                    code: code.clone(),
3881                                    severity: DiagnosticSeverity::INFORMATION,
3882                                    message: info.message.clone(),
3883                                    group_id,
3884                                    is_primary: false,
3885                                    is_valid: true,
3886                                    is_disk_based,
3887                                    is_unnecessary: false,
3888                                },
3889                            });
3890                        }
3891                    }
3892                }
3893            }
3894        }
3895
3896        for entry in &mut diagnostics {
3897            let diagnostic = &mut entry.diagnostic;
3898            if !diagnostic.is_primary {
3899                let source = *sources_by_group_id.get(&diagnostic.group_id).unwrap();
3900                if let Some(&(severity, is_unnecessary)) = supporting_diagnostics.get(&(
3901                    source,
3902                    diagnostic.code.clone(),
3903                    entry.range.clone(),
3904                )) {
3905                    if let Some(severity) = severity {
3906                        diagnostic.severity = severity;
3907                    }
3908                    diagnostic.is_unnecessary = is_unnecessary;
3909                }
3910            }
3911        }
3912
3913        self.update_diagnostic_entries(
3914            language_server_id,
3915            abs_path,
3916            params.version,
3917            diagnostics,
3918            cx,
3919        )?;
3920        Ok(())
3921    }
3922
3923    pub fn update_diagnostic_entries(
3924        &mut self,
3925        server_id: LanguageServerId,
3926        abs_path: PathBuf,
3927        version: Option<i32>,
3928        diagnostics: Vec<DiagnosticEntry<Unclipped<PointUtf16>>>,
3929        cx: &mut ModelContext<Project>,
3930    ) -> Result<(), anyhow::Error> {
3931        let (worktree, relative_path) = self
3932            .find_local_worktree(&abs_path, cx)
3933            .ok_or_else(|| anyhow!("no worktree found for diagnostics path {abs_path:?}"))?;
3934
3935        let project_path = ProjectPath {
3936            worktree_id: worktree.read(cx).id(),
3937            path: relative_path.into(),
3938        };
3939
3940        if let Some(buffer) = self.get_open_buffer(&project_path, cx) {
3941            self.update_buffer_diagnostics(&buffer, server_id, version, diagnostics.clone(), cx)?;
3942        }
3943
3944        let updated = worktree.update(cx, |worktree, cx| {
3945            worktree
3946                .as_local_mut()
3947                .ok_or_else(|| anyhow!("not a local worktree"))?
3948                .update_diagnostics(server_id, project_path.path.clone(), diagnostics, cx)
3949        })?;
3950        if updated {
3951            cx.emit(Event::DiagnosticsUpdated {
3952                language_server_id: server_id,
3953                path: project_path,
3954            });
3955        }
3956        Ok(())
3957    }
3958
3959    fn update_buffer_diagnostics(
3960        &mut self,
3961        buffer: &Model<Buffer>,
3962        server_id: LanguageServerId,
3963        version: Option<i32>,
3964        mut diagnostics: Vec<DiagnosticEntry<Unclipped<PointUtf16>>>,
3965        cx: &mut ModelContext<Self>,
3966    ) -> Result<()> {
3967        fn compare_diagnostics(a: &Diagnostic, b: &Diagnostic) -> Ordering {
3968            Ordering::Equal
3969                .then_with(|| b.is_primary.cmp(&a.is_primary))
3970                .then_with(|| a.is_disk_based.cmp(&b.is_disk_based))
3971                .then_with(|| a.severity.cmp(&b.severity))
3972                .then_with(|| a.message.cmp(&b.message))
3973        }
3974
3975        let snapshot = self.buffer_snapshot_for_lsp_version(buffer, server_id, version, cx)?;
3976
3977        diagnostics.sort_unstable_by(|a, b| {
3978            Ordering::Equal
3979                .then_with(|| a.range.start.cmp(&b.range.start))
3980                .then_with(|| b.range.end.cmp(&a.range.end))
3981                .then_with(|| compare_diagnostics(&a.diagnostic, &b.diagnostic))
3982        });
3983
3984        let mut sanitized_diagnostics = Vec::new();
3985        let edits_since_save = Patch::new(
3986            snapshot
3987                .edits_since::<Unclipped<PointUtf16>>(buffer.read(cx).saved_version())
3988                .collect(),
3989        );
3990        for entry in diagnostics {
3991            let start;
3992            let end;
3993            if entry.diagnostic.is_disk_based {
3994                // Some diagnostics are based on files on disk instead of buffers'
3995                // current contents. Adjust these diagnostics' ranges to reflect
3996                // any unsaved edits.
3997                start = edits_since_save.old_to_new(entry.range.start);
3998                end = edits_since_save.old_to_new(entry.range.end);
3999            } else {
4000                start = entry.range.start;
4001                end = entry.range.end;
4002            }
4003
4004            let mut range = snapshot.clip_point_utf16(start, Bias::Left)
4005                ..snapshot.clip_point_utf16(end, Bias::Right);
4006
4007            // Expand empty ranges by one codepoint
4008            if range.start == range.end {
4009                // This will be go to the next boundary when being clipped
4010                range.end.column += 1;
4011                range.end = snapshot.clip_point_utf16(Unclipped(range.end), Bias::Right);
4012                if range.start == range.end && range.end.column > 0 {
4013                    range.start.column -= 1;
4014                    range.end = snapshot.clip_point_utf16(Unclipped(range.end), Bias::Left);
4015                }
4016            }
4017
4018            sanitized_diagnostics.push(DiagnosticEntry {
4019                range,
4020                diagnostic: entry.diagnostic,
4021            });
4022        }
4023        drop(edits_since_save);
4024
4025        let set = DiagnosticSet::new(sanitized_diagnostics, &snapshot);
4026        buffer.update(cx, |buffer, cx| {
4027            buffer.update_diagnostics(server_id, set, cx)
4028        });
4029        Ok(())
4030    }
4031
4032    pub fn reload_buffers(
4033        &self,
4034        buffers: HashSet<Model<Buffer>>,
4035        push_to_history: bool,
4036        cx: &mut ModelContext<Self>,
4037    ) -> Task<Result<ProjectTransaction>> {
4038        let mut local_buffers = Vec::new();
4039        let mut remote_buffers = None;
4040        for buffer_handle in buffers {
4041            let buffer = buffer_handle.read(cx);
4042            if buffer.is_dirty() {
4043                if let Some(file) = File::from_dyn(buffer.file()) {
4044                    if file.is_local() {
4045                        local_buffers.push(buffer_handle);
4046                    } else {
4047                        remote_buffers.get_or_insert(Vec::new()).push(buffer_handle);
4048                    }
4049                }
4050            }
4051        }
4052
4053        let remote_buffers = self.remote_id().zip(remote_buffers);
4054        let client = self.client.clone();
4055
4056        cx.spawn(move |this, mut cx| async move {
4057            let mut project_transaction = ProjectTransaction::default();
4058
4059            if let Some((project_id, remote_buffers)) = remote_buffers {
4060                let response = client
4061                    .request(proto::ReloadBuffers {
4062                        project_id,
4063                        buffer_ids: remote_buffers
4064                            .iter()
4065                            .filter_map(|buffer| {
4066                                buffer.update(&mut cx, |buffer, _| buffer.remote_id()).ok()
4067                            })
4068                            .collect(),
4069                    })
4070                    .await?
4071                    .transaction
4072                    .ok_or_else(|| anyhow!("missing transaction"))?;
4073                project_transaction = this
4074                    .update(&mut cx, |this, cx| {
4075                        this.deserialize_project_transaction(response, push_to_history, cx)
4076                    })?
4077                    .await?;
4078            }
4079
4080            for buffer in local_buffers {
4081                let transaction = buffer
4082                    .update(&mut cx, |buffer, cx| buffer.reload(cx))?
4083                    .await?;
4084                buffer.update(&mut cx, |buffer, cx| {
4085                    if let Some(transaction) = transaction {
4086                        if !push_to_history {
4087                            buffer.forget_transaction(transaction.id);
4088                        }
4089                        project_transaction.0.insert(cx.handle(), transaction);
4090                    }
4091                })?;
4092            }
4093
4094            Ok(project_transaction)
4095        })
4096    }
4097
4098    pub fn format(
4099        &self,
4100        buffers: HashSet<Model<Buffer>>,
4101        push_to_history: bool,
4102        trigger: FormatTrigger,
4103        cx: &mut ModelContext<Project>,
4104    ) -> Task<anyhow::Result<ProjectTransaction>> {
4105        if self.is_local() {
4106            let mut buffers_with_paths_and_servers = buffers
4107                .into_iter()
4108                .filter_map(|buffer_handle| {
4109                    let buffer = buffer_handle.read(cx);
4110                    let file = File::from_dyn(buffer.file())?;
4111                    let buffer_abs_path = file.as_local().map(|f| f.abs_path(cx));
4112                    let server = self
4113                        .primary_language_server_for_buffer(buffer, cx)
4114                        .map(|s| s.1.clone());
4115                    Some((buffer_handle, buffer_abs_path, server))
4116                })
4117                .collect::<Vec<_>>();
4118
4119            cx.spawn(move |this, mut cx| async move {
4120                // Do not allow multiple concurrent formatting requests for the
4121                // same buffer.
4122                this.update(&mut cx, |this, cx| {
4123                    buffers_with_paths_and_servers.retain(|(buffer, _, _)| {
4124                        this.buffers_being_formatted
4125                            .insert(buffer.read(cx).remote_id())
4126                    });
4127                })?;
4128
4129                let _cleanup = defer({
4130                    let this = this.clone();
4131                    let mut cx = cx.clone();
4132                    let buffers = &buffers_with_paths_and_servers;
4133                    move || {
4134                        this.update(&mut cx, |this, cx| {
4135                            for (buffer, _, _) in buffers {
4136                                this.buffers_being_formatted
4137                                    .remove(&buffer.read(cx).remote_id());
4138                            }
4139                        }).ok();
4140                    }
4141                });
4142
4143                let mut project_transaction = ProjectTransaction::default();
4144                for (buffer, buffer_abs_path, language_server) in &buffers_with_paths_and_servers {
4145                    let settings = buffer.update(&mut cx, |buffer, cx| {
4146                        language_settings(buffer.language(), buffer.file(), cx).clone()
4147                    })?;
4148
4149                    let remove_trailing_whitespace = settings.remove_trailing_whitespace_on_save;
4150                    let ensure_final_newline = settings.ensure_final_newline_on_save;
4151                    let format_on_save = settings.format_on_save.clone();
4152                    let formatter = settings.formatter.clone();
4153                    let tab_size = settings.tab_size;
4154
4155                    // First, format buffer's whitespace according to the settings.
4156                    let trailing_whitespace_diff = if remove_trailing_whitespace {
4157                        Some(
4158                            buffer
4159                                .update(&mut cx, |b, cx| b.remove_trailing_whitespace(cx))?
4160                                .await,
4161                        )
4162                    } else {
4163                        None
4164                    };
4165                    let whitespace_transaction_id = buffer.update(&mut cx, |buffer, cx| {
4166                        buffer.finalize_last_transaction();
4167                        buffer.start_transaction();
4168                        if let Some(diff) = trailing_whitespace_diff {
4169                            buffer.apply_diff(diff, cx);
4170                        }
4171                        if ensure_final_newline {
4172                            buffer.ensure_final_newline(cx);
4173                        }
4174                        buffer.end_transaction(cx)
4175                    })?;
4176
4177                    // Currently, formatting operations are represented differently depending on
4178                    // whether they come from a language server or an external command.
4179                    enum FormatOperation {
4180                        Lsp(Vec<(Range<Anchor>, String)>),
4181                        External(Diff),
4182                        Prettier(Diff),
4183                    }
4184
4185                    // Apply language-specific formatting using either a language server
4186                    // or external command.
4187                    let mut format_operation = None;
4188                    match (formatter, format_on_save) {
4189                        (_, FormatOnSave::Off) if trigger == FormatTrigger::Save => {}
4190
4191                        (Formatter::LanguageServer, FormatOnSave::On | FormatOnSave::Off)
4192                        | (_, FormatOnSave::LanguageServer) => {
4193                            if let Some((language_server, buffer_abs_path)) =
4194                                language_server.as_ref().zip(buffer_abs_path.as_ref())
4195                            {
4196                                format_operation = Some(FormatOperation::Lsp(
4197                                    Self::format_via_lsp(
4198                                        &this,
4199                                        &buffer,
4200                                        buffer_abs_path,
4201                                        &language_server,
4202                                        tab_size,
4203                                        &mut cx,
4204                                    )
4205                                    .await
4206                                    .context("failed to format via language server")?,
4207                                ));
4208                            }
4209                        }
4210
4211                        (
4212                            Formatter::External { command, arguments },
4213                            FormatOnSave::On | FormatOnSave::Off,
4214                        )
4215                        | (_, FormatOnSave::External { command, arguments }) => {
4216                            if let Some(buffer_abs_path) = buffer_abs_path {
4217                                format_operation = Self::format_via_external_command(
4218                                    buffer,
4219                                    buffer_abs_path,
4220                                    &command,
4221                                    &arguments,
4222                                    &mut cx,
4223                                )
4224                                .await
4225                                .context(format!(
4226                                    "failed to format via external command {:?}",
4227                                    command
4228                                ))?
4229                                .map(FormatOperation::External);
4230                            }
4231                        }
4232                        (Formatter::Auto, FormatOnSave::On | FormatOnSave::Off) => {
4233                            if let Some(prettier_task) = this
4234                                .update(&mut cx, |project, cx| {
4235                                    project.prettier_instance_for_buffer(buffer, cx)
4236                                })?.await {
4237                                    match prettier_task.await
4238                                    {
4239                                        Ok(prettier) => {
4240                                            let buffer_path = buffer.update(&mut cx, |buffer, cx| {
4241                                                File::from_dyn(buffer.file()).map(|file| file.abs_path(cx))
4242                                            })?;
4243                                            format_operation = Some(FormatOperation::Prettier(
4244                                                prettier
4245                                                    .format(buffer, buffer_path, &mut cx)
4246                                                    .await
4247                                                    .context("formatting via prettier")?,
4248                                            ));
4249                                        }
4250                                        Err(e) => anyhow::bail!(
4251                                            "Failed to create prettier instance for buffer during autoformatting: {e:#}"
4252                                        ),
4253                                    }
4254                            } else if let Some((language_server, buffer_abs_path)) =
4255                                language_server.as_ref().zip(buffer_abs_path.as_ref())
4256                            {
4257                                format_operation = Some(FormatOperation::Lsp(
4258                                    Self::format_via_lsp(
4259                                        &this,
4260                                        &buffer,
4261                                        buffer_abs_path,
4262                                        &language_server,
4263                                        tab_size,
4264                                        &mut cx,
4265                                    )
4266                                    .await
4267                                    .context("failed to format via language server")?,
4268                                ));
4269                            }
4270                        }
4271                        (Formatter::Prettier { .. }, FormatOnSave::On | FormatOnSave::Off) => {
4272                            if let Some(prettier_task) = this
4273                                .update(&mut cx, |project, cx| {
4274                                    project.prettier_instance_for_buffer(buffer, cx)
4275                                })?.await {
4276                                    match prettier_task.await
4277                                    {
4278                                        Ok(prettier) => {
4279                                            let buffer_path = buffer.update(&mut cx, |buffer, cx| {
4280                                                File::from_dyn(buffer.file()).map(|file| file.abs_path(cx))
4281                                            })?;
4282                                            format_operation = Some(FormatOperation::Prettier(
4283                                                prettier
4284                                                    .format(buffer, buffer_path, &mut cx)
4285                                                    .await
4286                                                    .context("formatting via prettier")?,
4287                                            ));
4288                                        }
4289                                        Err(e) => anyhow::bail!(
4290                                            "Failed to create prettier instance for buffer during formatting: {e:#}"
4291                                        ),
4292                                    }
4293                                }
4294                        }
4295                    };
4296
4297                    buffer.update(&mut cx, |b, cx| {
4298                        // If the buffer had its whitespace formatted and was edited while the language-specific
4299                        // formatting was being computed, avoid applying the language-specific formatting, because
4300                        // it can't be grouped with the whitespace formatting in the undo history.
4301                        if let Some(transaction_id) = whitespace_transaction_id {
4302                            if b.peek_undo_stack()
4303                                .map_or(true, |e| e.transaction_id() != transaction_id)
4304                            {
4305                                format_operation.take();
4306                            }
4307                        }
4308
4309                        // Apply any language-specific formatting, and group the two formatting operations
4310                        // in the buffer's undo history.
4311                        if let Some(operation) = format_operation {
4312                            match operation {
4313                                FormatOperation::Lsp(edits) => {
4314                                    b.edit(edits, None, cx);
4315                                }
4316                                FormatOperation::External(diff) => {
4317                                    b.apply_diff(diff, cx);
4318                                }
4319                                FormatOperation::Prettier(diff) => {
4320                                    b.apply_diff(diff, cx);
4321                                }
4322                            }
4323
4324                            if let Some(transaction_id) = whitespace_transaction_id {
4325                                b.group_until_transaction(transaction_id);
4326                            }
4327                        }
4328
4329                        if let Some(transaction) = b.finalize_last_transaction().cloned() {
4330                            if !push_to_history {
4331                                b.forget_transaction(transaction.id);
4332                            }
4333                            project_transaction.0.insert(buffer.clone(), transaction);
4334                        }
4335                    })?;
4336                }
4337
4338                Ok(project_transaction)
4339            })
4340        } else {
4341            let remote_id = self.remote_id();
4342            let client = self.client.clone();
4343            cx.spawn(move |this, mut cx| async move {
4344                let mut project_transaction = ProjectTransaction::default();
4345                if let Some(project_id) = remote_id {
4346                    let response = client
4347                        .request(proto::FormatBuffers {
4348                            project_id,
4349                            trigger: trigger as i32,
4350                            buffer_ids: buffers
4351                                .iter()
4352                                .map(|buffer| {
4353                                    buffer.update(&mut cx, |buffer, _| buffer.remote_id())
4354                                })
4355                                .collect::<Result<_>>()?,
4356                        })
4357                        .await?
4358                        .transaction
4359                        .ok_or_else(|| anyhow!("missing transaction"))?;
4360                    project_transaction = this
4361                        .update(&mut cx, |this, cx| {
4362                            this.deserialize_project_transaction(response, push_to_history, cx)
4363                        })?
4364                        .await?;
4365                }
4366                Ok(project_transaction)
4367            })
4368        }
4369    }
4370
4371    async fn format_via_lsp(
4372        this: &WeakModel<Self>,
4373        buffer: &Model<Buffer>,
4374        abs_path: &Path,
4375        language_server: &Arc<LanguageServer>,
4376        tab_size: NonZeroU32,
4377        cx: &mut AsyncAppContext,
4378    ) -> Result<Vec<(Range<Anchor>, String)>> {
4379        let uri = lsp::Url::from_file_path(abs_path)
4380            .map_err(|_| anyhow!("failed to convert abs path to uri"))?;
4381        let text_document = lsp::TextDocumentIdentifier::new(uri);
4382        let capabilities = &language_server.capabilities();
4383
4384        let formatting_provider = capabilities.document_formatting_provider.as_ref();
4385        let range_formatting_provider = capabilities.document_range_formatting_provider.as_ref();
4386
4387        let lsp_edits = if matches!(formatting_provider, Some(p) if *p != OneOf::Left(false)) {
4388            language_server
4389                .request::<lsp::request::Formatting>(lsp::DocumentFormattingParams {
4390                    text_document,
4391                    options: lsp_command::lsp_formatting_options(tab_size.get()),
4392                    work_done_progress_params: Default::default(),
4393                })
4394                .await?
4395        } else if matches!(range_formatting_provider, Some(p) if *p != OneOf::Left(false)) {
4396            let buffer_start = lsp::Position::new(0, 0);
4397            let buffer_end = buffer.update(cx, |b, _| point_to_lsp(b.max_point_utf16()))?;
4398
4399            language_server
4400                .request::<lsp::request::RangeFormatting>(lsp::DocumentRangeFormattingParams {
4401                    text_document,
4402                    range: lsp::Range::new(buffer_start, buffer_end),
4403                    options: lsp_command::lsp_formatting_options(tab_size.get()),
4404                    work_done_progress_params: Default::default(),
4405                })
4406                .await?
4407        } else {
4408            None
4409        };
4410
4411        if let Some(lsp_edits) = lsp_edits {
4412            this.update(cx, |this, cx| {
4413                this.edits_from_lsp(buffer, lsp_edits, language_server.server_id(), None, cx)
4414            })?
4415            .await
4416        } else {
4417            Ok(Vec::new())
4418        }
4419    }
4420
4421    async fn format_via_external_command(
4422        buffer: &Model<Buffer>,
4423        buffer_abs_path: &Path,
4424        command: &str,
4425        arguments: &[String],
4426        cx: &mut AsyncAppContext,
4427    ) -> Result<Option<Diff>> {
4428        let working_dir_path = buffer.update(cx, |buffer, cx| {
4429            let file = File::from_dyn(buffer.file())?;
4430            let worktree = file.worktree.read(cx).as_local()?;
4431            let mut worktree_path = worktree.abs_path().to_path_buf();
4432            if worktree.root_entry()?.is_file() {
4433                worktree_path.pop();
4434            }
4435            Some(worktree_path)
4436        })?;
4437
4438        if let Some(working_dir_path) = working_dir_path {
4439            let mut child =
4440                smol::process::Command::new(command)
4441                    .args(arguments.iter().map(|arg| {
4442                        arg.replace("{buffer_path}", &buffer_abs_path.to_string_lossy())
4443                    }))
4444                    .current_dir(&working_dir_path)
4445                    .stdin(smol::process::Stdio::piped())
4446                    .stdout(smol::process::Stdio::piped())
4447                    .stderr(smol::process::Stdio::piped())
4448                    .spawn()?;
4449            let stdin = child
4450                .stdin
4451                .as_mut()
4452                .ok_or_else(|| anyhow!("failed to acquire stdin"))?;
4453            let text = buffer.update(cx, |buffer, _| buffer.as_rope().clone())?;
4454            for chunk in text.chunks() {
4455                stdin.write_all(chunk.as_bytes()).await?;
4456            }
4457            stdin.flush().await?;
4458
4459            let output = child.output().await?;
4460            if !output.status.success() {
4461                return Err(anyhow!(
4462                    "command failed with exit code {:?}:\nstdout: {}\nstderr: {}",
4463                    output.status.code(),
4464                    String::from_utf8_lossy(&output.stdout),
4465                    String::from_utf8_lossy(&output.stderr),
4466                ));
4467            }
4468
4469            let stdout = String::from_utf8(output.stdout)?;
4470            Ok(Some(
4471                buffer
4472                    .update(cx, |buffer, cx| buffer.diff(stdout, cx))?
4473                    .await,
4474            ))
4475        } else {
4476            Ok(None)
4477        }
4478    }
4479
4480    pub fn definition<T: ToPointUtf16>(
4481        &self,
4482        buffer: &Model<Buffer>,
4483        position: T,
4484        cx: &mut ModelContext<Self>,
4485    ) -> Task<Result<Vec<LocationLink>>> {
4486        let position = position.to_point_utf16(buffer.read(cx));
4487        self.request_lsp(
4488            buffer.clone(),
4489            LanguageServerToQuery::Primary,
4490            GetDefinition { position },
4491            cx,
4492        )
4493    }
4494
4495    pub fn type_definition<T: ToPointUtf16>(
4496        &self,
4497        buffer: &Model<Buffer>,
4498        position: T,
4499        cx: &mut ModelContext<Self>,
4500    ) -> Task<Result<Vec<LocationLink>>> {
4501        let position = position.to_point_utf16(buffer.read(cx));
4502        self.request_lsp(
4503            buffer.clone(),
4504            LanguageServerToQuery::Primary,
4505            GetTypeDefinition { position },
4506            cx,
4507        )
4508    }
4509
4510    pub fn references<T: ToPointUtf16>(
4511        &self,
4512        buffer: &Model<Buffer>,
4513        position: T,
4514        cx: &mut ModelContext<Self>,
4515    ) -> Task<Result<Vec<Location>>> {
4516        let position = position.to_point_utf16(buffer.read(cx));
4517        self.request_lsp(
4518            buffer.clone(),
4519            LanguageServerToQuery::Primary,
4520            GetReferences { position },
4521            cx,
4522        )
4523    }
4524
4525    pub fn document_highlights<T: ToPointUtf16>(
4526        &self,
4527        buffer: &Model<Buffer>,
4528        position: T,
4529        cx: &mut ModelContext<Self>,
4530    ) -> Task<Result<Vec<DocumentHighlight>>> {
4531        let position = position.to_point_utf16(buffer.read(cx));
4532        self.request_lsp(
4533            buffer.clone(),
4534            LanguageServerToQuery::Primary,
4535            GetDocumentHighlights { position },
4536            cx,
4537        )
4538    }
4539
4540    pub fn symbols(&self, query: &str, cx: &mut ModelContext<Self>) -> Task<Result<Vec<Symbol>>> {
4541        if self.is_local() {
4542            let mut requests = Vec::new();
4543            for ((worktree_id, _), server_id) in self.language_server_ids.iter() {
4544                let worktree_id = *worktree_id;
4545                let worktree_handle = self.worktree_for_id(worktree_id, cx);
4546                let worktree = match worktree_handle.and_then(|tree| tree.read(cx).as_local()) {
4547                    Some(worktree) => worktree,
4548                    None => continue,
4549                };
4550                let worktree_abs_path = worktree.abs_path().clone();
4551
4552                let (adapter, language, server) = match self.language_servers.get(server_id) {
4553                    Some(LanguageServerState::Running {
4554                        adapter,
4555                        language,
4556                        server,
4557                        ..
4558                    }) => (adapter.clone(), language.clone(), server),
4559
4560                    _ => continue,
4561                };
4562
4563                requests.push(
4564                    server
4565                        .request::<lsp::request::WorkspaceSymbolRequest>(
4566                            lsp::WorkspaceSymbolParams {
4567                                query: query.to_string(),
4568                                ..Default::default()
4569                            },
4570                        )
4571                        .log_err()
4572                        .map(move |response| {
4573                            let lsp_symbols = response.flatten().map(|symbol_response| match symbol_response {
4574                                lsp::WorkspaceSymbolResponse::Flat(flat_responses) => {
4575                                    flat_responses.into_iter().map(|lsp_symbol| {
4576                                        (lsp_symbol.name, lsp_symbol.kind, lsp_symbol.location)
4577                                    }).collect::<Vec<_>>()
4578                                }
4579                                lsp::WorkspaceSymbolResponse::Nested(nested_responses) => {
4580                                    nested_responses.into_iter().filter_map(|lsp_symbol| {
4581                                        let location = match lsp_symbol.location {
4582                                            OneOf::Left(location) => location,
4583                                            OneOf::Right(_) => {
4584                                                error!("Unexpected: client capabilities forbid symbol resolutions in workspace.symbol.resolveSupport");
4585                                                return None
4586                                            }
4587                                        };
4588                                        Some((lsp_symbol.name, lsp_symbol.kind, location))
4589                                    }).collect::<Vec<_>>()
4590                                }
4591                            }).unwrap_or_default();
4592
4593                            (
4594                                adapter,
4595                                language,
4596                                worktree_id,
4597                                worktree_abs_path,
4598                                lsp_symbols,
4599                            )
4600                        }),
4601                );
4602            }
4603
4604            cx.spawn(move |this, mut cx| async move {
4605                let responses = futures::future::join_all(requests).await;
4606                let this = match this.upgrade() {
4607                    Some(this) => this,
4608                    None => return Ok(Vec::new()),
4609                };
4610
4611                let symbols = this.update(&mut cx, |this, cx| {
4612                    let mut symbols = Vec::new();
4613                    for (
4614                        adapter,
4615                        adapter_language,
4616                        source_worktree_id,
4617                        worktree_abs_path,
4618                        lsp_symbols,
4619                    ) in responses
4620                    {
4621                        symbols.extend(lsp_symbols.into_iter().filter_map(
4622                            |(symbol_name, symbol_kind, symbol_location)| {
4623                                let abs_path = symbol_location.uri.to_file_path().ok()?;
4624                                let mut worktree_id = source_worktree_id;
4625                                let path;
4626                                if let Some((worktree, rel_path)) =
4627                                    this.find_local_worktree(&abs_path, cx)
4628                                {
4629                                    worktree_id = worktree.read(cx).id();
4630                                    path = rel_path;
4631                                } else {
4632                                    path = relativize_path(&worktree_abs_path, &abs_path);
4633                                }
4634
4635                                let project_path = ProjectPath {
4636                                    worktree_id,
4637                                    path: path.into(),
4638                                };
4639                                let signature = this.symbol_signature(&project_path);
4640                                let adapter_language = adapter_language.clone();
4641                                let language = this
4642                                    .languages
4643                                    .language_for_file(&project_path.path, None)
4644                                    .unwrap_or_else(move |_| adapter_language);
4645                                let language_server_name = adapter.name.clone();
4646                                Some(async move {
4647                                    let language = language.await;
4648                                    let label =
4649                                        language.label_for_symbol(&symbol_name, symbol_kind).await;
4650
4651                                    Symbol {
4652                                        language_server_name,
4653                                        source_worktree_id,
4654                                        path: project_path,
4655                                        label: label.unwrap_or_else(|| {
4656                                            CodeLabel::plain(symbol_name.clone(), None)
4657                                        }),
4658                                        kind: symbol_kind,
4659                                        name: symbol_name,
4660                                        range: range_from_lsp(symbol_location.range),
4661                                        signature,
4662                                    }
4663                                })
4664                            },
4665                        ));
4666                    }
4667
4668                    symbols
4669                })?;
4670
4671                Ok(futures::future::join_all(symbols).await)
4672            })
4673        } else if let Some(project_id) = self.remote_id() {
4674            let request = self.client.request(proto::GetProjectSymbols {
4675                project_id,
4676                query: query.to_string(),
4677            });
4678            cx.spawn(move |this, mut cx| async move {
4679                let response = request.await?;
4680                let mut symbols = Vec::new();
4681                if let Some(this) = this.upgrade() {
4682                    let new_symbols = this.update(&mut cx, |this, _| {
4683                        response
4684                            .symbols
4685                            .into_iter()
4686                            .map(|symbol| this.deserialize_symbol(symbol))
4687                            .collect::<Vec<_>>()
4688                    })?;
4689                    symbols = futures::future::join_all(new_symbols)
4690                        .await
4691                        .into_iter()
4692                        .filter_map(|symbol| symbol.log_err())
4693                        .collect::<Vec<_>>();
4694                }
4695                Ok(symbols)
4696            })
4697        } else {
4698            Task::ready(Ok(Default::default()))
4699        }
4700    }
4701
4702    pub fn open_buffer_for_symbol(
4703        &mut self,
4704        symbol: &Symbol,
4705        cx: &mut ModelContext<Self>,
4706    ) -> Task<Result<Model<Buffer>>> {
4707        if self.is_local() {
4708            let language_server_id = if let Some(id) = self.language_server_ids.get(&(
4709                symbol.source_worktree_id,
4710                symbol.language_server_name.clone(),
4711            )) {
4712                *id
4713            } else {
4714                return Task::ready(Err(anyhow!(
4715                    "language server for worktree and language not found"
4716                )));
4717            };
4718
4719            let worktree_abs_path = if let Some(worktree_abs_path) = self
4720                .worktree_for_id(symbol.path.worktree_id, cx)
4721                .and_then(|worktree| worktree.read(cx).as_local())
4722                .map(|local_worktree| local_worktree.abs_path())
4723            {
4724                worktree_abs_path
4725            } else {
4726                return Task::ready(Err(anyhow!("worktree not found for symbol")));
4727            };
4728            let symbol_abs_path = worktree_abs_path.join(&symbol.path.path);
4729            let symbol_uri = if let Ok(uri) = lsp::Url::from_file_path(symbol_abs_path) {
4730                uri
4731            } else {
4732                return Task::ready(Err(anyhow!("invalid symbol path")));
4733            };
4734
4735            self.open_local_buffer_via_lsp(
4736                symbol_uri,
4737                language_server_id,
4738                symbol.language_server_name.clone(),
4739                cx,
4740            )
4741        } else if let Some(project_id) = self.remote_id() {
4742            let request = self.client.request(proto::OpenBufferForSymbol {
4743                project_id,
4744                symbol: Some(serialize_symbol(symbol)),
4745            });
4746            cx.spawn(move |this, mut cx| async move {
4747                let response = request.await?;
4748                this.update(&mut cx, |this, cx| {
4749                    this.wait_for_remote_buffer(response.buffer_id, cx)
4750                })?
4751                .await
4752            })
4753        } else {
4754            Task::ready(Err(anyhow!("project does not have a remote id")))
4755        }
4756    }
4757
4758    pub fn hover<T: ToPointUtf16>(
4759        &self,
4760        buffer: &Model<Buffer>,
4761        position: T,
4762        cx: &mut ModelContext<Self>,
4763    ) -> Task<Result<Option<Hover>>> {
4764        let position = position.to_point_utf16(buffer.read(cx));
4765        self.request_lsp(
4766            buffer.clone(),
4767            LanguageServerToQuery::Primary,
4768            GetHover { position },
4769            cx,
4770        )
4771    }
4772
4773    pub fn completions<T: ToOffset + ToPointUtf16>(
4774        &self,
4775        buffer: &Model<Buffer>,
4776        position: T,
4777        cx: &mut ModelContext<Self>,
4778    ) -> Task<Result<Vec<Completion>>> {
4779        let position = position.to_point_utf16(buffer.read(cx));
4780        if self.is_local() {
4781            let snapshot = buffer.read(cx).snapshot();
4782            let offset = position.to_offset(&snapshot);
4783            let scope = snapshot.language_scope_at(offset);
4784
4785            let server_ids: Vec<_> = self
4786                .language_servers_for_buffer(buffer.read(cx), cx)
4787                .filter(|(_, server)| server.capabilities().completion_provider.is_some())
4788                .filter(|(adapter, _)| {
4789                    scope
4790                        .as_ref()
4791                        .map(|scope| scope.language_allowed(&adapter.name))
4792                        .unwrap_or(true)
4793                })
4794                .map(|(_, server)| server.server_id())
4795                .collect();
4796
4797            let buffer = buffer.clone();
4798            cx.spawn(move |this, mut cx| async move {
4799                let mut tasks = Vec::with_capacity(server_ids.len());
4800                this.update(&mut cx, |this, cx| {
4801                    for server_id in server_ids {
4802                        tasks.push(this.request_lsp(
4803                            buffer.clone(),
4804                            LanguageServerToQuery::Other(server_id),
4805                            GetCompletions { position },
4806                            cx,
4807                        ));
4808                    }
4809                })?;
4810
4811                let mut completions = Vec::new();
4812                for task in tasks {
4813                    if let Ok(new_completions) = task.await {
4814                        completions.extend_from_slice(&new_completions);
4815                    }
4816                }
4817
4818                Ok(completions)
4819            })
4820        } else if let Some(project_id) = self.remote_id() {
4821            self.send_lsp_proto_request(buffer.clone(), project_id, GetCompletions { position }, cx)
4822        } else {
4823            Task::ready(Ok(Default::default()))
4824        }
4825    }
4826
4827    pub fn apply_additional_edits_for_completion(
4828        &self,
4829        buffer_handle: Model<Buffer>,
4830        completion: Completion,
4831        push_to_history: bool,
4832        cx: &mut ModelContext<Self>,
4833    ) -> Task<Result<Option<Transaction>>> {
4834        let buffer = buffer_handle.read(cx);
4835        let buffer_id = buffer.remote_id();
4836
4837        if self.is_local() {
4838            let server_id = completion.server_id;
4839            let lang_server = match self.language_server_for_buffer(buffer, server_id, cx) {
4840                Some((_, server)) => server.clone(),
4841                _ => return Task::ready(Ok(Default::default())),
4842            };
4843
4844            cx.spawn(move |this, mut cx| async move {
4845                let can_resolve = lang_server
4846                    .capabilities()
4847                    .completion_provider
4848                    .as_ref()
4849                    .and_then(|options| options.resolve_provider)
4850                    .unwrap_or(false);
4851                let additional_text_edits = if can_resolve {
4852                    lang_server
4853                        .request::<lsp::request::ResolveCompletionItem>(completion.lsp_completion)
4854                        .await?
4855                        .additional_text_edits
4856                } else {
4857                    completion.lsp_completion.additional_text_edits
4858                };
4859                if let Some(edits) = additional_text_edits {
4860                    let edits = this
4861                        .update(&mut cx, |this, cx| {
4862                            this.edits_from_lsp(
4863                                &buffer_handle,
4864                                edits,
4865                                lang_server.server_id(),
4866                                None,
4867                                cx,
4868                            )
4869                        })?
4870                        .await?;
4871
4872                    buffer_handle.update(&mut cx, |buffer, cx| {
4873                        buffer.finalize_last_transaction();
4874                        buffer.start_transaction();
4875
4876                        for (range, text) in edits {
4877                            let primary = &completion.old_range;
4878                            let start_within = primary.start.cmp(&range.start, buffer).is_le()
4879                                && primary.end.cmp(&range.start, buffer).is_ge();
4880                            let end_within = range.start.cmp(&primary.end, buffer).is_le()
4881                                && range.end.cmp(&primary.end, buffer).is_ge();
4882
4883                            //Skip additional edits which overlap with the primary completion edit
4884                            //https://github.com/zed-industries/zed/pull/1871
4885                            if !start_within && !end_within {
4886                                buffer.edit([(range, text)], None, cx);
4887                            }
4888                        }
4889
4890                        let transaction = if buffer.end_transaction(cx).is_some() {
4891                            let transaction = buffer.finalize_last_transaction().unwrap().clone();
4892                            if !push_to_history {
4893                                buffer.forget_transaction(transaction.id);
4894                            }
4895                            Some(transaction)
4896                        } else {
4897                            None
4898                        };
4899                        Ok(transaction)
4900                    })?
4901                } else {
4902                    Ok(None)
4903                }
4904            })
4905        } else if let Some(project_id) = self.remote_id() {
4906            let client = self.client.clone();
4907            cx.spawn(move |_, mut cx| async move {
4908                let response = client
4909                    .request(proto::ApplyCompletionAdditionalEdits {
4910                        project_id,
4911                        buffer_id,
4912                        completion: Some(language::proto::serialize_completion(&completion)),
4913                    })
4914                    .await?;
4915
4916                if let Some(transaction) = response.transaction {
4917                    let transaction = language::proto::deserialize_transaction(transaction)?;
4918                    buffer_handle
4919                        .update(&mut cx, |buffer, _| {
4920                            buffer.wait_for_edits(transaction.edit_ids.iter().copied())
4921                        })?
4922                        .await?;
4923                    if push_to_history {
4924                        buffer_handle.update(&mut cx, |buffer, _| {
4925                            buffer.push_transaction(transaction.clone(), Instant::now());
4926                        })?;
4927                    }
4928                    Ok(Some(transaction))
4929                } else {
4930                    Ok(None)
4931                }
4932            })
4933        } else {
4934            Task::ready(Err(anyhow!("project does not have a remote id")))
4935        }
4936    }
4937
4938    pub fn code_actions<T: Clone + ToOffset>(
4939        &self,
4940        buffer_handle: &Model<Buffer>,
4941        range: Range<T>,
4942        cx: &mut ModelContext<Self>,
4943    ) -> Task<Result<Vec<CodeAction>>> {
4944        let buffer = buffer_handle.read(cx);
4945        let range = buffer.anchor_before(range.start)..buffer.anchor_before(range.end);
4946        self.request_lsp(
4947            buffer_handle.clone(),
4948            LanguageServerToQuery::Primary,
4949            GetCodeActions { range },
4950            cx,
4951        )
4952    }
4953
4954    pub fn apply_code_action(
4955        &self,
4956        buffer_handle: Model<Buffer>,
4957        mut action: CodeAction,
4958        push_to_history: bool,
4959        cx: &mut ModelContext<Self>,
4960    ) -> Task<Result<ProjectTransaction>> {
4961        if self.is_local() {
4962            let buffer = buffer_handle.read(cx);
4963            let (lsp_adapter, lang_server) = if let Some((adapter, server)) =
4964                self.language_server_for_buffer(buffer, action.server_id, cx)
4965            {
4966                (adapter.clone(), server.clone())
4967            } else {
4968                return Task::ready(Ok(Default::default()));
4969            };
4970            let range = action.range.to_point_utf16(buffer);
4971
4972            cx.spawn(move |this, mut cx| async move {
4973                if let Some(lsp_range) = action
4974                    .lsp_action
4975                    .data
4976                    .as_mut()
4977                    .and_then(|d| d.get_mut("codeActionParams"))
4978                    .and_then(|d| d.get_mut("range"))
4979                {
4980                    *lsp_range = serde_json::to_value(&range_to_lsp(range)).unwrap();
4981                    action.lsp_action = lang_server
4982                        .request::<lsp::request::CodeActionResolveRequest>(action.lsp_action)
4983                        .await?;
4984                } else {
4985                    let actions = this
4986                        .update(&mut cx, |this, cx| {
4987                            this.code_actions(&buffer_handle, action.range, cx)
4988                        })?
4989                        .await?;
4990                    action.lsp_action = actions
4991                        .into_iter()
4992                        .find(|a| a.lsp_action.title == action.lsp_action.title)
4993                        .ok_or_else(|| anyhow!("code action is outdated"))?
4994                        .lsp_action;
4995                }
4996
4997                if let Some(edit) = action.lsp_action.edit {
4998                    if edit.changes.is_some() || edit.document_changes.is_some() {
4999                        return Self::deserialize_workspace_edit(
5000                            this.upgrade().ok_or_else(|| anyhow!("no app present"))?,
5001                            edit,
5002                            push_to_history,
5003                            lsp_adapter.clone(),
5004                            lang_server.clone(),
5005                            &mut cx,
5006                        )
5007                        .await;
5008                    }
5009                }
5010
5011                if let Some(command) = action.lsp_action.command {
5012                    this.update(&mut cx, |this, _| {
5013                        this.last_workspace_edits_by_language_server
5014                            .remove(&lang_server.server_id());
5015                    })?;
5016
5017                    let result = lang_server
5018                        .request::<lsp::request::ExecuteCommand>(lsp::ExecuteCommandParams {
5019                            command: command.command,
5020                            arguments: command.arguments.unwrap_or_default(),
5021                            ..Default::default()
5022                        })
5023                        .await;
5024
5025                    if let Err(err) = result {
5026                        // TODO: LSP ERROR
5027                        return Err(err);
5028                    }
5029
5030                    return Ok(this.update(&mut cx, |this, _| {
5031                        this.last_workspace_edits_by_language_server
5032                            .remove(&lang_server.server_id())
5033                            .unwrap_or_default()
5034                    })?);
5035                }
5036
5037                Ok(ProjectTransaction::default())
5038            })
5039        } else if let Some(project_id) = self.remote_id() {
5040            let client = self.client.clone();
5041            let request = proto::ApplyCodeAction {
5042                project_id,
5043                buffer_id: buffer_handle.read(cx).remote_id(),
5044                action: Some(language::proto::serialize_code_action(&action)),
5045            };
5046            cx.spawn(move |this, mut cx| async move {
5047                let response = client
5048                    .request(request)
5049                    .await?
5050                    .transaction
5051                    .ok_or_else(|| anyhow!("missing transaction"))?;
5052                this.update(&mut cx, |this, cx| {
5053                    this.deserialize_project_transaction(response, push_to_history, cx)
5054                })?
5055                .await
5056            })
5057        } else {
5058            Task::ready(Err(anyhow!("project does not have a remote id")))
5059        }
5060    }
5061
5062    fn apply_on_type_formatting(
5063        &self,
5064        buffer: Model<Buffer>,
5065        position: Anchor,
5066        trigger: String,
5067        cx: &mut ModelContext<Self>,
5068    ) -> Task<Result<Option<Transaction>>> {
5069        if self.is_local() {
5070            cx.spawn(move |this, mut cx| async move {
5071                // Do not allow multiple concurrent formatting requests for the
5072                // same buffer.
5073                this.update(&mut cx, |this, cx| {
5074                    this.buffers_being_formatted
5075                        .insert(buffer.read(cx).remote_id())
5076                })?;
5077
5078                let _cleanup = defer({
5079                    let this = this.clone();
5080                    let mut cx = cx.clone();
5081                    let closure_buffer = buffer.clone();
5082                    move || {
5083                        this.update(&mut cx, |this, cx| {
5084                            this.buffers_being_formatted
5085                                .remove(&closure_buffer.read(cx).remote_id());
5086                        })
5087                        .ok();
5088                    }
5089                });
5090
5091                buffer
5092                    .update(&mut cx, |buffer, _| {
5093                        buffer.wait_for_edits(Some(position.timestamp))
5094                    })?
5095                    .await?;
5096                this.update(&mut cx, |this, cx| {
5097                    let position = position.to_point_utf16(buffer.read(cx));
5098                    this.on_type_format(buffer, position, trigger, false, cx)
5099                })?
5100                .await
5101            })
5102        } else if let Some(project_id) = self.remote_id() {
5103            let client = self.client.clone();
5104            let request = proto::OnTypeFormatting {
5105                project_id,
5106                buffer_id: buffer.read(cx).remote_id(),
5107                position: Some(serialize_anchor(&position)),
5108                trigger,
5109                version: serialize_version(&buffer.read(cx).version()),
5110            };
5111            cx.spawn(move |_, _| async move {
5112                client
5113                    .request(request)
5114                    .await?
5115                    .transaction
5116                    .map(language::proto::deserialize_transaction)
5117                    .transpose()
5118            })
5119        } else {
5120            Task::ready(Err(anyhow!("project does not have a remote id")))
5121        }
5122    }
5123
5124    async fn deserialize_edits(
5125        this: Model<Self>,
5126        buffer_to_edit: Model<Buffer>,
5127        edits: Vec<lsp::TextEdit>,
5128        push_to_history: bool,
5129        _: Arc<CachedLspAdapter>,
5130        language_server: Arc<LanguageServer>,
5131        cx: &mut AsyncAppContext,
5132    ) -> Result<Option<Transaction>> {
5133        let edits = this
5134            .update(cx, |this, cx| {
5135                this.edits_from_lsp(
5136                    &buffer_to_edit,
5137                    edits,
5138                    language_server.server_id(),
5139                    None,
5140                    cx,
5141                )
5142            })?
5143            .await?;
5144
5145        let transaction = buffer_to_edit.update(cx, |buffer, cx| {
5146            buffer.finalize_last_transaction();
5147            buffer.start_transaction();
5148            for (range, text) in edits {
5149                buffer.edit([(range, text)], None, cx);
5150            }
5151
5152            if buffer.end_transaction(cx).is_some() {
5153                let transaction = buffer.finalize_last_transaction().unwrap().clone();
5154                if !push_to_history {
5155                    buffer.forget_transaction(transaction.id);
5156                }
5157                Some(transaction)
5158            } else {
5159                None
5160            }
5161        })?;
5162
5163        Ok(transaction)
5164    }
5165
5166    async fn deserialize_workspace_edit(
5167        this: Model<Self>,
5168        edit: lsp::WorkspaceEdit,
5169        push_to_history: bool,
5170        lsp_adapter: Arc<CachedLspAdapter>,
5171        language_server: Arc<LanguageServer>,
5172        cx: &mut AsyncAppContext,
5173    ) -> Result<ProjectTransaction> {
5174        let fs = this.update(cx, |this, _| this.fs.clone())?;
5175        let mut operations = Vec::new();
5176        if let Some(document_changes) = edit.document_changes {
5177            match document_changes {
5178                lsp::DocumentChanges::Edits(edits) => {
5179                    operations.extend(edits.into_iter().map(lsp::DocumentChangeOperation::Edit))
5180                }
5181                lsp::DocumentChanges::Operations(ops) => operations = ops,
5182            }
5183        } else if let Some(changes) = edit.changes {
5184            operations.extend(changes.into_iter().map(|(uri, edits)| {
5185                lsp::DocumentChangeOperation::Edit(lsp::TextDocumentEdit {
5186                    text_document: lsp::OptionalVersionedTextDocumentIdentifier {
5187                        uri,
5188                        version: None,
5189                    },
5190                    edits: edits.into_iter().map(OneOf::Left).collect(),
5191                })
5192            }));
5193        }
5194
5195        let mut project_transaction = ProjectTransaction::default();
5196        for operation in operations {
5197            match operation {
5198                lsp::DocumentChangeOperation::Op(lsp::ResourceOp::Create(op)) => {
5199                    let abs_path = op
5200                        .uri
5201                        .to_file_path()
5202                        .map_err(|_| anyhow!("can't convert URI to path"))?;
5203
5204                    if let Some(parent_path) = abs_path.parent() {
5205                        fs.create_dir(parent_path).await?;
5206                    }
5207                    if abs_path.ends_with("/") {
5208                        fs.create_dir(&abs_path).await?;
5209                    } else {
5210                        fs.create_file(
5211                            &abs_path,
5212                            op.options
5213                                .map(|options| fs::CreateOptions {
5214                                    overwrite: options.overwrite.unwrap_or(false),
5215                                    ignore_if_exists: options.ignore_if_exists.unwrap_or(false),
5216                                })
5217                                .unwrap_or_default(),
5218                        )
5219                        .await?;
5220                    }
5221                }
5222
5223                lsp::DocumentChangeOperation::Op(lsp::ResourceOp::Rename(op)) => {
5224                    let source_abs_path = op
5225                        .old_uri
5226                        .to_file_path()
5227                        .map_err(|_| anyhow!("can't convert URI to path"))?;
5228                    let target_abs_path = op
5229                        .new_uri
5230                        .to_file_path()
5231                        .map_err(|_| anyhow!("can't convert URI to path"))?;
5232                    fs.rename(
5233                        &source_abs_path,
5234                        &target_abs_path,
5235                        op.options
5236                            .map(|options| fs::RenameOptions {
5237                                overwrite: options.overwrite.unwrap_or(false),
5238                                ignore_if_exists: options.ignore_if_exists.unwrap_or(false),
5239                            })
5240                            .unwrap_or_default(),
5241                    )
5242                    .await?;
5243                }
5244
5245                lsp::DocumentChangeOperation::Op(lsp::ResourceOp::Delete(op)) => {
5246                    let abs_path = op
5247                        .uri
5248                        .to_file_path()
5249                        .map_err(|_| anyhow!("can't convert URI to path"))?;
5250                    let options = op
5251                        .options
5252                        .map(|options| fs::RemoveOptions {
5253                            recursive: options.recursive.unwrap_or(false),
5254                            ignore_if_not_exists: options.ignore_if_not_exists.unwrap_or(false),
5255                        })
5256                        .unwrap_or_default();
5257                    if abs_path.ends_with("/") {
5258                        fs.remove_dir(&abs_path, options).await?;
5259                    } else {
5260                        fs.remove_file(&abs_path, options).await?;
5261                    }
5262                }
5263
5264                lsp::DocumentChangeOperation::Edit(op) => {
5265                    let buffer_to_edit = this
5266                        .update(cx, |this, cx| {
5267                            this.open_local_buffer_via_lsp(
5268                                op.text_document.uri,
5269                                language_server.server_id(),
5270                                lsp_adapter.name.clone(),
5271                                cx,
5272                            )
5273                        })?
5274                        .await?;
5275
5276                    let edits = this
5277                        .update(cx, |this, cx| {
5278                            let edits = op.edits.into_iter().map(|edit| match edit {
5279                                OneOf::Left(edit) => edit,
5280                                OneOf::Right(edit) => edit.text_edit,
5281                            });
5282                            this.edits_from_lsp(
5283                                &buffer_to_edit,
5284                                edits,
5285                                language_server.server_id(),
5286                                op.text_document.version,
5287                                cx,
5288                            )
5289                        })?
5290                        .await?;
5291
5292                    let transaction = buffer_to_edit.update(cx, |buffer, cx| {
5293                        buffer.finalize_last_transaction();
5294                        buffer.start_transaction();
5295                        for (range, text) in edits {
5296                            buffer.edit([(range, text)], None, cx);
5297                        }
5298                        let transaction = if buffer.end_transaction(cx).is_some() {
5299                            let transaction = buffer.finalize_last_transaction().unwrap().clone();
5300                            if !push_to_history {
5301                                buffer.forget_transaction(transaction.id);
5302                            }
5303                            Some(transaction)
5304                        } else {
5305                            None
5306                        };
5307
5308                        transaction
5309                    })?;
5310                    if let Some(transaction) = transaction {
5311                        project_transaction.0.insert(buffer_to_edit, transaction);
5312                    }
5313                }
5314            }
5315        }
5316
5317        Ok(project_transaction)
5318    }
5319
5320    pub fn prepare_rename<T: ToPointUtf16>(
5321        &self,
5322        buffer: Model<Buffer>,
5323        position: T,
5324        cx: &mut ModelContext<Self>,
5325    ) -> Task<Result<Option<Range<Anchor>>>> {
5326        let position = position.to_point_utf16(buffer.read(cx));
5327        self.request_lsp(
5328            buffer,
5329            LanguageServerToQuery::Primary,
5330            PrepareRename { position },
5331            cx,
5332        )
5333    }
5334
5335    pub fn perform_rename<T: ToPointUtf16>(
5336        &self,
5337        buffer: Model<Buffer>,
5338        position: T,
5339        new_name: String,
5340        push_to_history: bool,
5341        cx: &mut ModelContext<Self>,
5342    ) -> Task<Result<ProjectTransaction>> {
5343        let position = position.to_point_utf16(buffer.read(cx));
5344        self.request_lsp(
5345            buffer,
5346            LanguageServerToQuery::Primary,
5347            PerformRename {
5348                position,
5349                new_name,
5350                push_to_history,
5351            },
5352            cx,
5353        )
5354    }
5355
5356    pub fn on_type_format<T: ToPointUtf16>(
5357        &self,
5358        buffer: Model<Buffer>,
5359        position: T,
5360        trigger: String,
5361        push_to_history: bool,
5362        cx: &mut ModelContext<Self>,
5363    ) -> Task<Result<Option<Transaction>>> {
5364        let (position, tab_size) = buffer.update(cx, |buffer, cx| {
5365            let position = position.to_point_utf16(buffer);
5366            (
5367                position,
5368                language_settings(buffer.language_at(position).as_ref(), buffer.file(), cx)
5369                    .tab_size,
5370            )
5371        });
5372        self.request_lsp(
5373            buffer.clone(),
5374            LanguageServerToQuery::Primary,
5375            OnTypeFormatting {
5376                position,
5377                trigger,
5378                options: lsp_command::lsp_formatting_options(tab_size.get()).into(),
5379                push_to_history,
5380            },
5381            cx,
5382        )
5383    }
5384
5385    pub fn inlay_hints<T: ToOffset>(
5386        &self,
5387        buffer_handle: Model<Buffer>,
5388        range: Range<T>,
5389        cx: &mut ModelContext<Self>,
5390    ) -> Task<anyhow::Result<Vec<InlayHint>>> {
5391        let buffer = buffer_handle.read(cx);
5392        let range = buffer.anchor_before(range.start)..buffer.anchor_before(range.end);
5393        let range_start = range.start;
5394        let range_end = range.end;
5395        let buffer_id = buffer.remote_id();
5396        let buffer_version = buffer.version().clone();
5397        let lsp_request = InlayHints { range };
5398
5399        if self.is_local() {
5400            let lsp_request_task = self.request_lsp(
5401                buffer_handle.clone(),
5402                LanguageServerToQuery::Primary,
5403                lsp_request,
5404                cx,
5405            );
5406            cx.spawn(move |_, mut cx| async move {
5407                buffer_handle
5408                    .update(&mut cx, |buffer, _| {
5409                        buffer.wait_for_edits(vec![range_start.timestamp, range_end.timestamp])
5410                    })?
5411                    .await
5412                    .context("waiting for inlay hint request range edits")?;
5413                lsp_request_task.await.context("inlay hints LSP request")
5414            })
5415        } else if let Some(project_id) = self.remote_id() {
5416            let client = self.client.clone();
5417            let request = proto::InlayHints {
5418                project_id,
5419                buffer_id,
5420                start: Some(serialize_anchor(&range_start)),
5421                end: Some(serialize_anchor(&range_end)),
5422                version: serialize_version(&buffer_version),
5423            };
5424            cx.spawn(move |project, cx| async move {
5425                let response = client
5426                    .request(request)
5427                    .await
5428                    .context("inlay hints proto request")?;
5429                let hints_request_result = LspCommand::response_from_proto(
5430                    lsp_request,
5431                    response,
5432                    project.upgrade().ok_or_else(|| anyhow!("No project"))?,
5433                    buffer_handle.clone(),
5434                    cx,
5435                )
5436                .await;
5437
5438                hints_request_result.context("inlay hints proto response conversion")
5439            })
5440        } else {
5441            Task::ready(Err(anyhow!("project does not have a remote id")))
5442        }
5443    }
5444
5445    pub fn resolve_inlay_hint(
5446        &self,
5447        hint: InlayHint,
5448        buffer_handle: Model<Buffer>,
5449        server_id: LanguageServerId,
5450        cx: &mut ModelContext<Self>,
5451    ) -> Task<anyhow::Result<InlayHint>> {
5452        if self.is_local() {
5453            let buffer = buffer_handle.read(cx);
5454            let (_, lang_server) = if let Some((adapter, server)) =
5455                self.language_server_for_buffer(buffer, server_id, cx)
5456            {
5457                (adapter.clone(), server.clone())
5458            } else {
5459                return Task::ready(Ok(hint));
5460            };
5461            if !InlayHints::can_resolve_inlays(lang_server.capabilities()) {
5462                return Task::ready(Ok(hint));
5463            }
5464
5465            let buffer_snapshot = buffer.snapshot();
5466            cx.spawn(move |_, mut cx| async move {
5467                let resolve_task = lang_server.request::<lsp::request::InlayHintResolveRequest>(
5468                    InlayHints::project_to_lsp_hint(hint, &buffer_snapshot),
5469                );
5470                let resolved_hint = resolve_task
5471                    .await
5472                    .context("inlay hint resolve LSP request")?;
5473                let resolved_hint = InlayHints::lsp_to_project_hint(
5474                    resolved_hint,
5475                    &buffer_handle,
5476                    server_id,
5477                    ResolveState::Resolved,
5478                    false,
5479                    &mut cx,
5480                )
5481                .await?;
5482                Ok(resolved_hint)
5483            })
5484        } else if let Some(project_id) = self.remote_id() {
5485            let client = self.client.clone();
5486            let request = proto::ResolveInlayHint {
5487                project_id,
5488                buffer_id: buffer_handle.read(cx).remote_id(),
5489                language_server_id: server_id.0 as u64,
5490                hint: Some(InlayHints::project_to_proto_hint(hint.clone())),
5491            };
5492            cx.spawn(move |_, _| async move {
5493                let response = client
5494                    .request(request)
5495                    .await
5496                    .context("inlay hints proto request")?;
5497                match response.hint {
5498                    Some(resolved_hint) => InlayHints::proto_to_project_hint(resolved_hint)
5499                        .context("inlay hints proto resolve response conversion"),
5500                    None => Ok(hint),
5501                }
5502            })
5503        } else {
5504            Task::ready(Err(anyhow!("project does not have a remote id")))
5505        }
5506    }
5507
5508    #[allow(clippy::type_complexity)]
5509    pub fn search(
5510        &self,
5511        query: SearchQuery,
5512        cx: &mut ModelContext<Self>,
5513    ) -> Receiver<(Model<Buffer>, Vec<Range<Anchor>>)> {
5514        if self.is_local() {
5515            self.search_local(query, cx)
5516        } else if let Some(project_id) = self.remote_id() {
5517            let (tx, rx) = smol::channel::unbounded();
5518            let request = self.client.request(query.to_proto(project_id));
5519            cx.spawn(move |this, mut cx| async move {
5520                let response = request.await?;
5521                let mut result = HashMap::default();
5522                for location in response.locations {
5523                    let target_buffer = this
5524                        .update(&mut cx, |this, cx| {
5525                            this.wait_for_remote_buffer(location.buffer_id, cx)
5526                        })?
5527                        .await?;
5528                    let start = location
5529                        .start
5530                        .and_then(deserialize_anchor)
5531                        .ok_or_else(|| anyhow!("missing target start"))?;
5532                    let end = location
5533                        .end
5534                        .and_then(deserialize_anchor)
5535                        .ok_or_else(|| anyhow!("missing target end"))?;
5536                    result
5537                        .entry(target_buffer)
5538                        .or_insert(Vec::new())
5539                        .push(start..end)
5540                }
5541                for (buffer, ranges) in result {
5542                    let _ = tx.send((buffer, ranges)).await;
5543                }
5544                Result::<(), anyhow::Error>::Ok(())
5545            })
5546            .detach_and_log_err(cx);
5547            rx
5548        } else {
5549            unimplemented!();
5550        }
5551    }
5552
5553    pub fn search_local(
5554        &self,
5555        query: SearchQuery,
5556        cx: &mut ModelContext<Self>,
5557    ) -> Receiver<(Model<Buffer>, Vec<Range<Anchor>>)> {
5558        // Local search is split into several phases.
5559        // TL;DR is that we do 2 passes; initial pass to pick files which contain at least one match
5560        // and the second phase that finds positions of all the matches found in the candidate files.
5561        // The Receiver obtained from this function returns matches sorted by buffer path. Files without a buffer path are reported first.
5562        //
5563        // It gets a bit hairy though, because we must account for files that do not have a persistent representation
5564        // on FS. Namely, if you have an untitled buffer or unsaved changes in a buffer, we want to scan that too.
5565        //
5566        // 1. We initialize a queue of match candidates and feed all opened buffers into it (== unsaved files / untitled buffers).
5567        //    Then, we go through a worktree and check for files that do match a predicate. If the file had an opened version, we skip the scan
5568        //    of FS version for that file altogether - after all, what we have in memory is more up-to-date than what's in FS.
5569        // 2. At this point, we have a list of all potentially matching buffers/files.
5570        //    We sort that list by buffer path - this list is retained for later use.
5571        //    We ensure that all buffers are now opened and available in project.
5572        // 3. We run a scan over all the candidate buffers on multiple background threads.
5573        //    We cannot assume that there will even be a match - while at least one match
5574        //    is guaranteed for files obtained from FS, the buffers we got from memory (unsaved files/unnamed buffers) might not have a match at all.
5575        //    There is also an auxilliary background thread responsible for result gathering.
5576        //    This is where the sorted list of buffers comes into play to maintain sorted order; Whenever this background thread receives a notification (buffer has/doesn't have matches),
5577        //    it keeps it around. It reports matches in sorted order, though it accepts them in unsorted order as well.
5578        //    As soon as the match info on next position in sorted order becomes available, it reports it (if it's a match) or skips to the next
5579        //    entry - which might already be available thanks to out-of-order processing.
5580        //
5581        // We could also report matches fully out-of-order, without maintaining a sorted list of matching paths.
5582        // This however would mean that project search (that is the main user of this function) would have to do the sorting itself, on the go.
5583        // This isn't as straightforward as running an insertion sort sadly, and would also mean that it would have to care about maintaining match index
5584        // in face of constantly updating list of sorted matches.
5585        // Meanwhile, this implementation offers index stability, since the matches are already reported in a sorted order.
5586        let snapshots = self
5587            .visible_worktrees(cx)
5588            .filter_map(|tree| {
5589                let tree = tree.read(cx).as_local()?;
5590                Some(tree.snapshot())
5591            })
5592            .collect::<Vec<_>>();
5593
5594        let background = cx.background_executor().clone();
5595        let path_count: usize = snapshots.iter().map(|s| s.visible_file_count()).sum();
5596        if path_count == 0 {
5597            let (_, rx) = smol::channel::bounded(1024);
5598            return rx;
5599        }
5600        let workers = background.num_cpus().min(path_count);
5601        let (matching_paths_tx, matching_paths_rx) = smol::channel::bounded(1024);
5602        let mut unnamed_files = vec![];
5603        let opened_buffers = self
5604            .opened_buffers
5605            .iter()
5606            .filter_map(|(_, b)| {
5607                let buffer = b.upgrade()?;
5608                let snapshot = buffer.update(cx, |buffer, _| buffer.snapshot());
5609                if let Some(path) = snapshot.file().map(|file| file.path()) {
5610                    Some((path.clone(), (buffer, snapshot)))
5611                } else {
5612                    unnamed_files.push(buffer);
5613                    None
5614                }
5615            })
5616            .collect();
5617        cx.background_executor()
5618            .spawn(Self::background_search(
5619                unnamed_files,
5620                opened_buffers,
5621                cx.background_executor().clone(),
5622                self.fs.clone(),
5623                workers,
5624                query.clone(),
5625                path_count,
5626                snapshots,
5627                matching_paths_tx,
5628            ))
5629            .detach();
5630
5631        let (buffers, buffers_rx) = Self::sort_candidates_and_open_buffers(matching_paths_rx, cx);
5632        let background = cx.background_executor().clone();
5633        let (result_tx, result_rx) = smol::channel::bounded(1024);
5634        cx.background_executor()
5635            .spawn(async move {
5636                let Ok(buffers) = buffers.await else {
5637                    return;
5638                };
5639
5640                let buffers_len = buffers.len();
5641                if buffers_len == 0 {
5642                    return;
5643                }
5644                let query = &query;
5645                let (finished_tx, mut finished_rx) = smol::channel::unbounded();
5646                background
5647                    .scoped(|scope| {
5648                        #[derive(Clone)]
5649                        struct FinishedStatus {
5650                            entry: Option<(Model<Buffer>, Vec<Range<Anchor>>)>,
5651                            buffer_index: SearchMatchCandidateIndex,
5652                        }
5653
5654                        for _ in 0..workers {
5655                            let finished_tx = finished_tx.clone();
5656                            let mut buffers_rx = buffers_rx.clone();
5657                            scope.spawn(async move {
5658                                while let Some((entry, buffer_index)) = buffers_rx.next().await {
5659                                    let buffer_matches = if let Some((_, snapshot)) = entry.as_ref()
5660                                    {
5661                                        if query.file_matches(
5662                                            snapshot.file().map(|file| file.path().as_ref()),
5663                                        ) {
5664                                            query
5665                                                .search(&snapshot, None)
5666                                                .await
5667                                                .iter()
5668                                                .map(|range| {
5669                                                    snapshot.anchor_before(range.start)
5670                                                        ..snapshot.anchor_after(range.end)
5671                                                })
5672                                                .collect()
5673                                        } else {
5674                                            Vec::new()
5675                                        }
5676                                    } else {
5677                                        Vec::new()
5678                                    };
5679
5680                                    let status = if !buffer_matches.is_empty() {
5681                                        let entry = if let Some((buffer, _)) = entry.as_ref() {
5682                                            Some((buffer.clone(), buffer_matches))
5683                                        } else {
5684                                            None
5685                                        };
5686                                        FinishedStatus {
5687                                            entry,
5688                                            buffer_index,
5689                                        }
5690                                    } else {
5691                                        FinishedStatus {
5692                                            entry: None,
5693                                            buffer_index,
5694                                        }
5695                                    };
5696                                    if finished_tx.send(status).await.is_err() {
5697                                        break;
5698                                    }
5699                                }
5700                            });
5701                        }
5702                        // Report sorted matches
5703                        scope.spawn(async move {
5704                            let mut current_index = 0;
5705                            let mut scratch = vec![None; buffers_len];
5706                            while let Some(status) = finished_rx.next().await {
5707                                debug_assert!(
5708                                    scratch[status.buffer_index].is_none(),
5709                                    "Got match status of position {} twice",
5710                                    status.buffer_index
5711                                );
5712                                let index = status.buffer_index;
5713                                scratch[index] = Some(status);
5714                                while current_index < buffers_len {
5715                                    let Some(current_entry) = scratch[current_index].take() else {
5716                                        // We intentionally **do not** increment `current_index` here. When next element arrives
5717                                        // from `finished_rx`, we will inspect the same position again, hoping for it to be Some(_)
5718                                        // this time.
5719                                        break;
5720                                    };
5721                                    if let Some(entry) = current_entry.entry {
5722                                        result_tx.send(entry).await.log_err();
5723                                    }
5724                                    current_index += 1;
5725                                }
5726                                if current_index == buffers_len {
5727                                    break;
5728                                }
5729                            }
5730                        });
5731                    })
5732                    .await;
5733            })
5734            .detach();
5735        result_rx
5736    }
5737
5738    /// Pick paths that might potentially contain a match of a given search query.
5739    async fn background_search(
5740        unnamed_buffers: Vec<Model<Buffer>>,
5741        opened_buffers: HashMap<Arc<Path>, (Model<Buffer>, BufferSnapshot)>,
5742        executor: BackgroundExecutor,
5743        fs: Arc<dyn Fs>,
5744        workers: usize,
5745        query: SearchQuery,
5746        path_count: usize,
5747        snapshots: Vec<LocalSnapshot>,
5748        matching_paths_tx: Sender<SearchMatchCandidate>,
5749    ) {
5750        let fs = &fs;
5751        let query = &query;
5752        let matching_paths_tx = &matching_paths_tx;
5753        let snapshots = &snapshots;
5754        let paths_per_worker = (path_count + workers - 1) / workers;
5755        for buffer in unnamed_buffers {
5756            matching_paths_tx
5757                .send(SearchMatchCandidate::OpenBuffer {
5758                    buffer: buffer.clone(),
5759                    path: None,
5760                })
5761                .await
5762                .log_err();
5763        }
5764        for (path, (buffer, _)) in opened_buffers.iter() {
5765            matching_paths_tx
5766                .send(SearchMatchCandidate::OpenBuffer {
5767                    buffer: buffer.clone(),
5768                    path: Some(path.clone()),
5769                })
5770                .await
5771                .log_err();
5772        }
5773        executor
5774            .scoped(|scope| {
5775                for worker_ix in 0..workers {
5776                    let worker_start_ix = worker_ix * paths_per_worker;
5777                    let worker_end_ix = worker_start_ix + paths_per_worker;
5778                    let unnamed_buffers = opened_buffers.clone();
5779                    scope.spawn(async move {
5780                        let mut snapshot_start_ix = 0;
5781                        let mut abs_path = PathBuf::new();
5782                        for snapshot in snapshots {
5783                            let snapshot_end_ix = snapshot_start_ix + snapshot.visible_file_count();
5784                            if worker_end_ix <= snapshot_start_ix {
5785                                break;
5786                            } else if worker_start_ix > snapshot_end_ix {
5787                                snapshot_start_ix = snapshot_end_ix;
5788                                continue;
5789                            } else {
5790                                let start_in_snapshot =
5791                                    worker_start_ix.saturating_sub(snapshot_start_ix);
5792                                let end_in_snapshot =
5793                                    cmp::min(worker_end_ix, snapshot_end_ix) - snapshot_start_ix;
5794
5795                                for entry in snapshot
5796                                    .files(false, start_in_snapshot)
5797                                    .take(end_in_snapshot - start_in_snapshot)
5798                                {
5799                                    if matching_paths_tx.is_closed() {
5800                                        break;
5801                                    }
5802                                    if unnamed_buffers.contains_key(&entry.path) {
5803                                        continue;
5804                                    }
5805                                    let matches = if query.file_matches(Some(&entry.path)) {
5806                                        abs_path.clear();
5807                                        abs_path.push(&snapshot.abs_path());
5808                                        abs_path.push(&entry.path);
5809                                        if let Some(file) = fs.open_sync(&abs_path).await.log_err()
5810                                        {
5811                                            query.detect(file).unwrap_or(false)
5812                                        } else {
5813                                            false
5814                                        }
5815                                    } else {
5816                                        false
5817                                    };
5818
5819                                    if matches {
5820                                        let project_path = SearchMatchCandidate::Path {
5821                                            worktree_id: snapshot.id(),
5822                                            path: entry.path.clone(),
5823                                        };
5824                                        if matching_paths_tx.send(project_path).await.is_err() {
5825                                            break;
5826                                        }
5827                                    }
5828                                }
5829
5830                                snapshot_start_ix = snapshot_end_ix;
5831                            }
5832                        }
5833                    });
5834                }
5835            })
5836            .await;
5837    }
5838
5839    fn request_lsp<R: LspCommand>(
5840        &self,
5841        buffer_handle: Model<Buffer>,
5842        server: LanguageServerToQuery,
5843        request: R,
5844        cx: &mut ModelContext<Self>,
5845    ) -> Task<Result<R::Response>>
5846    where
5847        <R::LspRequest as lsp::request::Request>::Result: Send,
5848        <R::LspRequest as lsp::request::Request>::Params: Send,
5849    {
5850        let buffer = buffer_handle.read(cx);
5851        if self.is_local() {
5852            let language_server = match server {
5853                LanguageServerToQuery::Primary => {
5854                    match self.primary_language_server_for_buffer(buffer, cx) {
5855                        Some((_, server)) => Some(Arc::clone(server)),
5856                        None => return Task::ready(Ok(Default::default())),
5857                    }
5858                }
5859                LanguageServerToQuery::Other(id) => self
5860                    .language_server_for_buffer(buffer, id, cx)
5861                    .map(|(_, server)| Arc::clone(server)),
5862            };
5863            let file = File::from_dyn(buffer.file()).and_then(File::as_local);
5864            if let (Some(file), Some(language_server)) = (file, language_server) {
5865                let lsp_params = request.to_lsp(&file.abs_path(cx), buffer, &language_server, cx);
5866                return cx.spawn(move |this, cx| async move {
5867                    if !request.check_capabilities(language_server.capabilities()) {
5868                        return Ok(Default::default());
5869                    }
5870
5871                    let result = language_server.request::<R::LspRequest>(lsp_params).await;
5872                    let response = match result {
5873                        Ok(response) => response,
5874
5875                        Err(err) => {
5876                            log::warn!(
5877                                "Generic lsp request to {} failed: {}",
5878                                language_server.name(),
5879                                err
5880                            );
5881                            return Err(err);
5882                        }
5883                    };
5884
5885                    request
5886                        .response_from_lsp(
5887                            response,
5888                            this.upgrade().ok_or_else(|| anyhow!("no app context"))?,
5889                            buffer_handle,
5890                            language_server.server_id(),
5891                            cx,
5892                        )
5893                        .await
5894                });
5895            }
5896        } else if let Some(project_id) = self.remote_id() {
5897            return self.send_lsp_proto_request(buffer_handle, project_id, request, cx);
5898        }
5899
5900        Task::ready(Ok(Default::default()))
5901    }
5902
5903    fn send_lsp_proto_request<R: LspCommand>(
5904        &self,
5905        buffer: Model<Buffer>,
5906        project_id: u64,
5907        request: R,
5908        cx: &mut ModelContext<'_, Project>,
5909    ) -> Task<anyhow::Result<<R as LspCommand>::Response>> {
5910        let rpc = self.client.clone();
5911        let message = request.to_proto(project_id, buffer.read(cx));
5912        cx.spawn(move |this, mut cx| async move {
5913            // Ensure the project is still alive by the time the task
5914            // is scheduled.
5915            this.upgrade().context("project dropped")?;
5916            let response = rpc.request(message).await?;
5917            let this = this.upgrade().context("project dropped")?;
5918            if this.update(&mut cx, |this, _| this.is_read_only())? {
5919                Err(anyhow!("disconnected before completing request"))
5920            } else {
5921                request
5922                    .response_from_proto(response, this, buffer, cx)
5923                    .await
5924            }
5925        })
5926    }
5927
5928    fn sort_candidates_and_open_buffers(
5929        mut matching_paths_rx: Receiver<SearchMatchCandidate>,
5930        cx: &mut ModelContext<Self>,
5931    ) -> (
5932        futures::channel::oneshot::Receiver<Vec<SearchMatchCandidate>>,
5933        Receiver<(
5934            Option<(Model<Buffer>, BufferSnapshot)>,
5935            SearchMatchCandidateIndex,
5936        )>,
5937    ) {
5938        let (buffers_tx, buffers_rx) = smol::channel::bounded(1024);
5939        let (sorted_buffers_tx, sorted_buffers_rx) = futures::channel::oneshot::channel();
5940        cx.spawn(move |this, cx| async move {
5941            let mut buffers = vec![];
5942            while let Some(entry) = matching_paths_rx.next().await {
5943                buffers.push(entry);
5944            }
5945            buffers.sort_by_key(|candidate| candidate.path());
5946            let matching_paths = buffers.clone();
5947            let _ = sorted_buffers_tx.send(buffers);
5948            for (index, candidate) in matching_paths.into_iter().enumerate() {
5949                if buffers_tx.is_closed() {
5950                    break;
5951                }
5952                let this = this.clone();
5953                let buffers_tx = buffers_tx.clone();
5954                cx.spawn(move |mut cx| async move {
5955                    let buffer = match candidate {
5956                        SearchMatchCandidate::OpenBuffer { buffer, .. } => Some(buffer),
5957                        SearchMatchCandidate::Path { worktree_id, path } => this
5958                            .update(&mut cx, |this, cx| {
5959                                this.open_buffer((worktree_id, path), cx)
5960                            })?
5961                            .await
5962                            .log_err(),
5963                    };
5964                    if let Some(buffer) = buffer {
5965                        let snapshot = buffer.update(&mut cx, |buffer, _| buffer.snapshot())?;
5966                        buffers_tx
5967                            .send((Some((buffer, snapshot)), index))
5968                            .await
5969                            .log_err();
5970                    } else {
5971                        buffers_tx.send((None, index)).await.log_err();
5972                    }
5973
5974                    Ok::<_, anyhow::Error>(())
5975                })
5976                .detach();
5977            }
5978        })
5979        .detach();
5980        (sorted_buffers_rx, buffers_rx)
5981    }
5982
5983    pub fn find_or_create_local_worktree(
5984        &mut self,
5985        abs_path: impl AsRef<Path>,
5986        visible: bool,
5987        cx: &mut ModelContext<Self>,
5988    ) -> Task<Result<(Model<Worktree>, PathBuf)>> {
5989        let abs_path = abs_path.as_ref();
5990        if let Some((tree, relative_path)) = self.find_local_worktree(abs_path, cx) {
5991            Task::ready(Ok((tree, relative_path)))
5992        } else {
5993            let worktree = self.create_local_worktree(abs_path, visible, cx);
5994            cx.background_executor()
5995                .spawn(async move { Ok((worktree.await?, PathBuf::new())) })
5996        }
5997    }
5998
5999    pub fn find_local_worktree(
6000        &self,
6001        abs_path: &Path,
6002        cx: &AppContext,
6003    ) -> Option<(Model<Worktree>, PathBuf)> {
6004        for tree in &self.worktrees {
6005            if let Some(tree) = tree.upgrade() {
6006                if let Some(relative_path) = tree
6007                    .read(cx)
6008                    .as_local()
6009                    .and_then(|t| abs_path.strip_prefix(t.abs_path()).ok())
6010                {
6011                    return Some((tree.clone(), relative_path.into()));
6012                }
6013            }
6014        }
6015        None
6016    }
6017
6018    pub fn is_shared(&self) -> bool {
6019        match &self.client_state {
6020            Some(ProjectClientState::Local { .. }) => true,
6021            _ => false,
6022        }
6023    }
6024
6025    fn create_local_worktree(
6026        &mut self,
6027        abs_path: impl AsRef<Path>,
6028        visible: bool,
6029        cx: &mut ModelContext<Self>,
6030    ) -> Task<Result<Model<Worktree>>> {
6031        let fs = self.fs.clone();
6032        let client = self.client.clone();
6033        let next_entry_id = self.next_entry_id.clone();
6034        let path: Arc<Path> = abs_path.as_ref().into();
6035        let task = self
6036            .loading_local_worktrees
6037            .entry(path.clone())
6038            .or_insert_with(|| {
6039                cx.spawn(move |project, mut cx| {
6040                    async move {
6041                        let worktree = Worktree::local(
6042                            client.clone(),
6043                            path.clone(),
6044                            visible,
6045                            fs,
6046                            next_entry_id,
6047                            &mut cx,
6048                        )
6049                        .await;
6050
6051                        project.update(&mut cx, |project, _| {
6052                            project.loading_local_worktrees.remove(&path);
6053                        })?;
6054
6055                        let worktree = worktree?;
6056                        project
6057                            .update(&mut cx, |project, cx| project.add_worktree(&worktree, cx))?;
6058                        Ok(worktree)
6059                    }
6060                    .map_err(Arc::new)
6061                })
6062                .shared()
6063            })
6064            .clone();
6065        cx.background_executor().spawn(async move {
6066            match task.await {
6067                Ok(worktree) => Ok(worktree),
6068                Err(err) => Err(anyhow!("{}", err)),
6069            }
6070        })
6071    }
6072
6073    pub fn remove_worktree(&mut self, id_to_remove: WorktreeId, cx: &mut ModelContext<Self>) {
6074        self.worktrees.retain(|worktree| {
6075            if let Some(worktree) = worktree.upgrade() {
6076                let id = worktree.read(cx).id();
6077                if id == id_to_remove {
6078                    cx.emit(Event::WorktreeRemoved(id));
6079                    false
6080                } else {
6081                    true
6082                }
6083            } else {
6084                false
6085            }
6086        });
6087        self.metadata_changed(cx);
6088    }
6089
6090    fn add_worktree(&mut self, worktree: &Model<Worktree>, cx: &mut ModelContext<Self>) {
6091        cx.observe(worktree, |_, _, cx| cx.notify()).detach();
6092        if worktree.read(cx).is_local() {
6093            cx.subscribe(worktree, |this, worktree, event, cx| match event {
6094                worktree::Event::UpdatedEntries(changes) => {
6095                    this.update_local_worktree_buffers(&worktree, changes, cx);
6096                    this.update_local_worktree_language_servers(&worktree, changes, cx);
6097                    this.update_local_worktree_settings(&worktree, changes, cx);
6098                    this.update_prettier_settings(&worktree, changes, cx);
6099                    cx.emit(Event::WorktreeUpdatedEntries(
6100                        worktree.read(cx).id(),
6101                        changes.clone(),
6102                    ));
6103                }
6104                worktree::Event::UpdatedGitRepositories(updated_repos) => {
6105                    this.update_local_worktree_buffers_git_repos(worktree, updated_repos, cx)
6106                }
6107            })
6108            .detach();
6109        }
6110
6111        let push_strong_handle = {
6112            let worktree = worktree.read(cx);
6113            self.is_shared() || worktree.is_visible() || worktree.is_remote()
6114        };
6115        if push_strong_handle {
6116            self.worktrees
6117                .push(WorktreeHandle::Strong(worktree.clone()));
6118        } else {
6119            self.worktrees
6120                .push(WorktreeHandle::Weak(worktree.downgrade()));
6121        }
6122
6123        let handle_id = worktree.entity_id();
6124        cx.observe_release(worktree, move |this, worktree, cx| {
6125            let _ = this.remove_worktree(worktree.id(), cx);
6126            cx.update_global::<SettingsStore, _>(|store, cx| {
6127                store
6128                    .clear_local_settings(handle_id.as_u64() as usize, cx)
6129                    .log_err()
6130            });
6131        })
6132        .detach();
6133
6134        cx.emit(Event::WorktreeAdded);
6135        self.metadata_changed(cx);
6136    }
6137
6138    fn update_local_worktree_buffers(
6139        &mut self,
6140        worktree_handle: &Model<Worktree>,
6141        changes: &[(Arc<Path>, ProjectEntryId, PathChange)],
6142        cx: &mut ModelContext<Self>,
6143    ) {
6144        let snapshot = worktree_handle.read(cx).snapshot();
6145
6146        let mut renamed_buffers = Vec::new();
6147        for (path, entry_id, _) in changes {
6148            let worktree_id = worktree_handle.read(cx).id();
6149            let project_path = ProjectPath {
6150                worktree_id,
6151                path: path.clone(),
6152            };
6153
6154            let buffer_id = match self.local_buffer_ids_by_entry_id.get(entry_id) {
6155                Some(&buffer_id) => buffer_id,
6156                None => match self.local_buffer_ids_by_path.get(&project_path) {
6157                    Some(&buffer_id) => buffer_id,
6158                    None => {
6159                        continue;
6160                    }
6161                },
6162            };
6163
6164            let open_buffer = self.opened_buffers.get(&buffer_id);
6165            let buffer = if let Some(buffer) = open_buffer.and_then(|buffer| buffer.upgrade()) {
6166                buffer
6167            } else {
6168                self.opened_buffers.remove(&buffer_id);
6169                self.local_buffer_ids_by_path.remove(&project_path);
6170                self.local_buffer_ids_by_entry_id.remove(entry_id);
6171                continue;
6172            };
6173
6174            buffer.update(cx, |buffer, cx| {
6175                if let Some(old_file) = File::from_dyn(buffer.file()) {
6176                    if old_file.worktree != *worktree_handle {
6177                        return;
6178                    }
6179
6180                    let new_file = if let Some(entry) = snapshot.entry_for_id(old_file.entry_id) {
6181                        File {
6182                            is_local: true,
6183                            entry_id: entry.id,
6184                            mtime: entry.mtime,
6185                            path: entry.path.clone(),
6186                            worktree: worktree_handle.clone(),
6187                            is_deleted: false,
6188                        }
6189                    } else if let Some(entry) = snapshot.entry_for_path(old_file.path().as_ref()) {
6190                        File {
6191                            is_local: true,
6192                            entry_id: entry.id,
6193                            mtime: entry.mtime,
6194                            path: entry.path.clone(),
6195                            worktree: worktree_handle.clone(),
6196                            is_deleted: false,
6197                        }
6198                    } else {
6199                        File {
6200                            is_local: true,
6201                            entry_id: old_file.entry_id,
6202                            path: old_file.path().clone(),
6203                            mtime: old_file.mtime(),
6204                            worktree: worktree_handle.clone(),
6205                            is_deleted: true,
6206                        }
6207                    };
6208
6209                    let old_path = old_file.abs_path(cx);
6210                    if new_file.abs_path(cx) != old_path {
6211                        renamed_buffers.push((cx.handle(), old_file.clone()));
6212                        self.local_buffer_ids_by_path.remove(&project_path);
6213                        self.local_buffer_ids_by_path.insert(
6214                            ProjectPath {
6215                                worktree_id,
6216                                path: path.clone(),
6217                            },
6218                            buffer_id,
6219                        );
6220                    }
6221
6222                    if new_file.entry_id != *entry_id {
6223                        self.local_buffer_ids_by_entry_id.remove(entry_id);
6224                        self.local_buffer_ids_by_entry_id
6225                            .insert(new_file.entry_id, buffer_id);
6226                    }
6227
6228                    if new_file != *old_file {
6229                        if let Some(project_id) = self.remote_id() {
6230                            self.client
6231                                .send(proto::UpdateBufferFile {
6232                                    project_id,
6233                                    buffer_id: buffer_id as u64,
6234                                    file: Some(new_file.to_proto()),
6235                                })
6236                                .log_err();
6237                        }
6238
6239                        buffer.file_updated(Arc::new(new_file), cx).detach();
6240                    }
6241                }
6242            });
6243        }
6244
6245        for (buffer, old_file) in renamed_buffers {
6246            self.unregister_buffer_from_language_servers(&buffer, &old_file, cx);
6247            self.detect_language_for_buffer(&buffer, cx);
6248            self.register_buffer_with_language_servers(&buffer, cx);
6249        }
6250    }
6251
6252    fn update_local_worktree_language_servers(
6253        &mut self,
6254        worktree_handle: &Model<Worktree>,
6255        changes: &[(Arc<Path>, ProjectEntryId, PathChange)],
6256        cx: &mut ModelContext<Self>,
6257    ) {
6258        if changes.is_empty() {
6259            return;
6260        }
6261
6262        let worktree_id = worktree_handle.read(cx).id();
6263        let mut language_server_ids = self
6264            .language_server_ids
6265            .iter()
6266            .filter_map(|((server_worktree_id, _), server_id)| {
6267                (*server_worktree_id == worktree_id).then_some(*server_id)
6268            })
6269            .collect::<Vec<_>>();
6270        language_server_ids.sort();
6271        language_server_ids.dedup();
6272
6273        let abs_path = worktree_handle.read(cx).abs_path();
6274        for server_id in &language_server_ids {
6275            if let Some(LanguageServerState::Running {
6276                server,
6277                watched_paths,
6278                ..
6279            }) = self.language_servers.get(server_id)
6280            {
6281                if let Some(watched_paths) = watched_paths.get(&worktree_id) {
6282                    let params = lsp::DidChangeWatchedFilesParams {
6283                        changes: changes
6284                            .iter()
6285                            .filter_map(|(path, _, change)| {
6286                                if !watched_paths.is_match(&path) {
6287                                    return None;
6288                                }
6289                                let typ = match change {
6290                                    PathChange::Loaded => return None,
6291                                    PathChange::Added => lsp::FileChangeType::CREATED,
6292                                    PathChange::Removed => lsp::FileChangeType::DELETED,
6293                                    PathChange::Updated => lsp::FileChangeType::CHANGED,
6294                                    PathChange::AddedOrUpdated => lsp::FileChangeType::CHANGED,
6295                                };
6296                                Some(lsp::FileEvent {
6297                                    uri: lsp::Url::from_file_path(abs_path.join(path)).unwrap(),
6298                                    typ,
6299                                })
6300                            })
6301                            .collect(),
6302                    };
6303
6304                    if !params.changes.is_empty() {
6305                        server
6306                            .notify::<lsp::notification::DidChangeWatchedFiles>(params)
6307                            .log_err();
6308                    }
6309                }
6310            }
6311        }
6312    }
6313
6314    fn update_local_worktree_buffers_git_repos(
6315        &mut self,
6316        worktree_handle: Model<Worktree>,
6317        changed_repos: &UpdatedGitRepositoriesSet,
6318        cx: &mut ModelContext<Self>,
6319    ) {
6320        debug_assert!(worktree_handle.read(cx).is_local());
6321
6322        // Identify the loading buffers whose containing repository that has changed.
6323        let future_buffers = self
6324            .loading_buffers_by_path
6325            .iter()
6326            .filter_map(|(project_path, receiver)| {
6327                if project_path.worktree_id != worktree_handle.read(cx).id() {
6328                    return None;
6329                }
6330                let path = &project_path.path;
6331                changed_repos
6332                    .iter()
6333                    .find(|(work_dir, _)| path.starts_with(work_dir))?;
6334                let receiver = receiver.clone();
6335                let path = path.clone();
6336                Some(async move {
6337                    wait_for_loading_buffer(receiver)
6338                        .await
6339                        .ok()
6340                        .map(|buffer| (buffer, path))
6341                })
6342            })
6343            .collect::<FuturesUnordered<_>>();
6344
6345        // Identify the current buffers whose containing repository has changed.
6346        let current_buffers = self
6347            .opened_buffers
6348            .values()
6349            .filter_map(|buffer| {
6350                let buffer = buffer.upgrade()?;
6351                let file = File::from_dyn(buffer.read(cx).file())?;
6352                if file.worktree != worktree_handle {
6353                    return None;
6354                }
6355                let path = file.path();
6356                changed_repos
6357                    .iter()
6358                    .find(|(work_dir, _)| path.starts_with(work_dir))?;
6359                Some((buffer, path.clone()))
6360            })
6361            .collect::<Vec<_>>();
6362
6363        if future_buffers.len() + current_buffers.len() == 0 {
6364            return;
6365        }
6366
6367        let remote_id = self.remote_id();
6368        let client = self.client.clone();
6369        cx.spawn(move |_, mut cx| async move {
6370            // Wait for all of the buffers to load.
6371            let future_buffers = future_buffers.collect::<Vec<_>>().await;
6372
6373            // Reload the diff base for every buffer whose containing git repository has changed.
6374            let snapshot =
6375                worktree_handle.update(&mut cx, |tree, _| tree.as_local().unwrap().snapshot())?;
6376            let diff_bases_by_buffer = cx
6377                .background_executor()
6378                .spawn(async move {
6379                    future_buffers
6380                        .into_iter()
6381                        .filter_map(|e| e)
6382                        .chain(current_buffers)
6383                        .filter_map(|(buffer, path)| {
6384                            let (work_directory, repo) =
6385                                snapshot.repository_and_work_directory_for_path(&path)?;
6386                            let repo = snapshot.get_local_repo(&repo)?;
6387                            let relative_path = path.strip_prefix(&work_directory).ok()?;
6388                            let base_text = repo.repo_ptr.lock().load_index_text(&relative_path);
6389                            Some((buffer, base_text))
6390                        })
6391                        .collect::<Vec<_>>()
6392                })
6393                .await;
6394
6395            // Assign the new diff bases on all of the buffers.
6396            for (buffer, diff_base) in diff_bases_by_buffer {
6397                let buffer_id = buffer.update(&mut cx, |buffer, cx| {
6398                    buffer.set_diff_base(diff_base.clone(), cx);
6399                    buffer.remote_id()
6400                })?;
6401                if let Some(project_id) = remote_id {
6402                    client
6403                        .send(proto::UpdateDiffBase {
6404                            project_id,
6405                            buffer_id,
6406                            diff_base,
6407                        })
6408                        .log_err();
6409                }
6410            }
6411
6412            anyhow::Ok(())
6413        })
6414        .detach();
6415    }
6416
6417    fn update_local_worktree_settings(
6418        &mut self,
6419        worktree: &Model<Worktree>,
6420        changes: &UpdatedEntriesSet,
6421        cx: &mut ModelContext<Self>,
6422    ) {
6423        let project_id = self.remote_id();
6424        let worktree_id = worktree.entity_id();
6425        let worktree = worktree.read(cx).as_local().unwrap();
6426        let remote_worktree_id = worktree.id();
6427
6428        let mut settings_contents = Vec::new();
6429        for (path, _, change) in changes.iter() {
6430            if path.ends_with(&*LOCAL_SETTINGS_RELATIVE_PATH) {
6431                let settings_dir = Arc::from(
6432                    path.ancestors()
6433                        .nth(LOCAL_SETTINGS_RELATIVE_PATH.components().count())
6434                        .unwrap(),
6435                );
6436                let fs = self.fs.clone();
6437                let removed = *change == PathChange::Removed;
6438                let abs_path = worktree.absolutize(path);
6439                settings_contents.push(async move {
6440                    (settings_dir, (!removed).then_some(fs.load(&abs_path).await))
6441                });
6442            }
6443        }
6444
6445        if settings_contents.is_empty() {
6446            return;
6447        }
6448
6449        let client = self.client.clone();
6450        cx.spawn(move |_, cx| async move {
6451            let settings_contents: Vec<(Arc<Path>, _)> =
6452                futures::future::join_all(settings_contents).await;
6453            cx.update(|cx| {
6454                cx.update_global::<SettingsStore, _>(|store, cx| {
6455                    for (directory, file_content) in settings_contents {
6456                        let file_content = file_content.and_then(|content| content.log_err());
6457                        store
6458                            .set_local_settings(
6459                                worktree_id.as_u64() as usize,
6460                                directory.clone(),
6461                                file_content.as_ref().map(String::as_str),
6462                                cx,
6463                            )
6464                            .log_err();
6465                        if let Some(remote_id) = project_id {
6466                            client
6467                                .send(proto::UpdateWorktreeSettings {
6468                                    project_id: remote_id,
6469                                    worktree_id: remote_worktree_id.to_proto(),
6470                                    path: directory.to_string_lossy().into_owned(),
6471                                    content: file_content,
6472                                })
6473                                .log_err();
6474                        }
6475                    }
6476                });
6477            })
6478            .ok();
6479        })
6480        .detach();
6481    }
6482
6483    fn update_prettier_settings(
6484        &self,
6485        worktree: &Model<Worktree>,
6486        changes: &[(Arc<Path>, ProjectEntryId, PathChange)],
6487        cx: &mut ModelContext<'_, Project>,
6488    ) {
6489        let prettier_config_files = Prettier::CONFIG_FILE_NAMES
6490            .iter()
6491            .map(Path::new)
6492            .collect::<HashSet<_>>();
6493
6494        let prettier_config_file_changed = changes
6495            .iter()
6496            .filter(|(_, _, change)| !matches!(change, PathChange::Loaded))
6497            .filter(|(path, _, _)| {
6498                !path
6499                    .components()
6500                    .any(|component| component.as_os_str().to_string_lossy() == "node_modules")
6501            })
6502            .find(|(path, _, _)| prettier_config_files.contains(path.as_ref()));
6503        let current_worktree_id = worktree.read(cx).id();
6504        if let Some((config_path, _, _)) = prettier_config_file_changed {
6505            log::info!(
6506                "Prettier config file {config_path:?} changed, reloading prettier instances for worktree {current_worktree_id}"
6507            );
6508            let prettiers_to_reload = self
6509                .prettier_instances
6510                .iter()
6511                .filter_map(|((worktree_id, prettier_path), prettier_task)| {
6512                    if worktree_id.is_none() || worktree_id == &Some(current_worktree_id) {
6513                        Some((*worktree_id, prettier_path.clone(), prettier_task.clone()))
6514                    } else {
6515                        None
6516                    }
6517                })
6518                .collect::<Vec<_>>();
6519
6520            cx.background_executor()
6521                .spawn(async move {
6522                    for task_result in future::join_all(prettiers_to_reload.into_iter().map(|(worktree_id, prettier_path, prettier_task)| {
6523                        async move {
6524                            prettier_task.await?
6525                                .clear_cache()
6526                                .await
6527                                .with_context(|| {
6528                                    format!(
6529                                        "clearing prettier {prettier_path:?} cache for worktree {worktree_id:?} on prettier settings update"
6530                                    )
6531                                })
6532                                .map_err(Arc::new)
6533                        }
6534                    }))
6535                    .await
6536                    {
6537                        if let Err(e) = task_result {
6538                            log::error!("Failed to clear cache for prettier: {e:#}");
6539                        }
6540                    }
6541                })
6542                .detach();
6543        }
6544    }
6545
6546    pub fn set_active_path(&mut self, entry: Option<ProjectPath>, cx: &mut ModelContext<Self>) {
6547        let new_active_entry = entry.and_then(|project_path| {
6548            let worktree = self.worktree_for_id(project_path.worktree_id, cx)?;
6549            let entry = worktree.read(cx).entry_for_path(project_path.path)?;
6550            Some(entry.id)
6551        });
6552        if new_active_entry != self.active_entry {
6553            self.active_entry = new_active_entry;
6554            cx.emit(Event::ActiveEntryChanged(new_active_entry));
6555        }
6556    }
6557
6558    pub fn language_servers_running_disk_based_diagnostics(
6559        &self,
6560    ) -> impl Iterator<Item = LanguageServerId> + '_ {
6561        self.language_server_statuses
6562            .iter()
6563            .filter_map(|(id, status)| {
6564                if status.has_pending_diagnostic_updates {
6565                    Some(*id)
6566                } else {
6567                    None
6568                }
6569            })
6570    }
6571
6572    pub fn diagnostic_summary(&self, cx: &AppContext) -> DiagnosticSummary {
6573        let mut summary = DiagnosticSummary::default();
6574        for (_, _, path_summary) in self.diagnostic_summaries(cx) {
6575            summary.error_count += path_summary.error_count;
6576            summary.warning_count += path_summary.warning_count;
6577        }
6578        summary
6579    }
6580
6581    pub fn diagnostic_summaries<'a>(
6582        &'a self,
6583        cx: &'a AppContext,
6584    ) -> impl Iterator<Item = (ProjectPath, LanguageServerId, DiagnosticSummary)> + 'a {
6585        self.visible_worktrees(cx).flat_map(move |worktree| {
6586            let worktree = worktree.read(cx);
6587            let worktree_id = worktree.id();
6588            worktree
6589                .diagnostic_summaries()
6590                .map(move |(path, server_id, summary)| {
6591                    (ProjectPath { worktree_id, path }, server_id, summary)
6592                })
6593        })
6594    }
6595
6596    pub fn disk_based_diagnostics_started(
6597        &mut self,
6598        language_server_id: LanguageServerId,
6599        cx: &mut ModelContext<Self>,
6600    ) {
6601        cx.emit(Event::DiskBasedDiagnosticsStarted { language_server_id });
6602    }
6603
6604    pub fn disk_based_diagnostics_finished(
6605        &mut self,
6606        language_server_id: LanguageServerId,
6607        cx: &mut ModelContext<Self>,
6608    ) {
6609        cx.emit(Event::DiskBasedDiagnosticsFinished { language_server_id });
6610    }
6611
6612    pub fn active_entry(&self) -> Option<ProjectEntryId> {
6613        self.active_entry
6614    }
6615
6616    pub fn entry_for_path(&self, path: &ProjectPath, cx: &AppContext) -> Option<Entry> {
6617        self.worktree_for_id(path.worktree_id, cx)?
6618            .read(cx)
6619            .entry_for_path(&path.path)
6620            .cloned()
6621    }
6622
6623    pub fn path_for_entry(&self, entry_id: ProjectEntryId, cx: &AppContext) -> Option<ProjectPath> {
6624        let worktree = self.worktree_for_entry(entry_id, cx)?;
6625        let worktree = worktree.read(cx);
6626        let worktree_id = worktree.id();
6627        let path = worktree.entry_for_id(entry_id)?.path.clone();
6628        Some(ProjectPath { worktree_id, path })
6629    }
6630
6631    pub fn absolute_path(&self, project_path: &ProjectPath, cx: &AppContext) -> Option<PathBuf> {
6632        let workspace_root = self
6633            .worktree_for_id(project_path.worktree_id, cx)?
6634            .read(cx)
6635            .abs_path();
6636        let project_path = project_path.path.as_ref();
6637
6638        Some(if project_path == Path::new("") {
6639            workspace_root.to_path_buf()
6640        } else {
6641            workspace_root.join(project_path)
6642        })
6643    }
6644
6645    // RPC message handlers
6646
6647    async fn handle_unshare_project(
6648        this: Model<Self>,
6649        _: TypedEnvelope<proto::UnshareProject>,
6650        _: Arc<Client>,
6651        mut cx: AsyncAppContext,
6652    ) -> Result<()> {
6653        this.update(&mut cx, |this, cx| {
6654            if this.is_local() {
6655                this.unshare(cx)?;
6656            } else {
6657                this.disconnected_from_host(cx);
6658            }
6659            Ok(())
6660        })?
6661    }
6662
6663    async fn handle_add_collaborator(
6664        this: Model<Self>,
6665        mut envelope: TypedEnvelope<proto::AddProjectCollaborator>,
6666        _: Arc<Client>,
6667        mut cx: AsyncAppContext,
6668    ) -> Result<()> {
6669        let collaborator = envelope
6670            .payload
6671            .collaborator
6672            .take()
6673            .ok_or_else(|| anyhow!("empty collaborator"))?;
6674
6675        let collaborator = Collaborator::from_proto(collaborator)?;
6676        this.update(&mut cx, |this, cx| {
6677            this.shared_buffers.remove(&collaborator.peer_id);
6678            cx.emit(Event::CollaboratorJoined(collaborator.peer_id));
6679            this.collaborators
6680                .insert(collaborator.peer_id, collaborator);
6681            cx.notify();
6682        })?;
6683
6684        Ok(())
6685    }
6686
6687    async fn handle_update_project_collaborator(
6688        this: Model<Self>,
6689        envelope: TypedEnvelope<proto::UpdateProjectCollaborator>,
6690        _: Arc<Client>,
6691        mut cx: AsyncAppContext,
6692    ) -> Result<()> {
6693        let old_peer_id = envelope
6694            .payload
6695            .old_peer_id
6696            .ok_or_else(|| anyhow!("missing old peer id"))?;
6697        let new_peer_id = envelope
6698            .payload
6699            .new_peer_id
6700            .ok_or_else(|| anyhow!("missing new peer id"))?;
6701        this.update(&mut cx, |this, cx| {
6702            let collaborator = this
6703                .collaborators
6704                .remove(&old_peer_id)
6705                .ok_or_else(|| anyhow!("received UpdateProjectCollaborator for unknown peer"))?;
6706            let is_host = collaborator.replica_id == 0;
6707            this.collaborators.insert(new_peer_id, collaborator);
6708
6709            let buffers = this.shared_buffers.remove(&old_peer_id);
6710            log::info!(
6711                "peer {} became {}. moving buffers {:?}",
6712                old_peer_id,
6713                new_peer_id,
6714                &buffers
6715            );
6716            if let Some(buffers) = buffers {
6717                this.shared_buffers.insert(new_peer_id, buffers);
6718            }
6719
6720            if is_host {
6721                this.opened_buffers
6722                    .retain(|_, buffer| !matches!(buffer, OpenBuffer::Operations(_)));
6723                this.buffer_ordered_messages_tx
6724                    .unbounded_send(BufferOrderedMessage::Resync)
6725                    .unwrap();
6726            }
6727
6728            cx.emit(Event::CollaboratorUpdated {
6729                old_peer_id,
6730                new_peer_id,
6731            });
6732            cx.notify();
6733            Ok(())
6734        })?
6735    }
6736
6737    async fn handle_remove_collaborator(
6738        this: Model<Self>,
6739        envelope: TypedEnvelope<proto::RemoveProjectCollaborator>,
6740        _: Arc<Client>,
6741        mut cx: AsyncAppContext,
6742    ) -> Result<()> {
6743        this.update(&mut cx, |this, cx| {
6744            let peer_id = envelope
6745                .payload
6746                .peer_id
6747                .ok_or_else(|| anyhow!("invalid peer id"))?;
6748            let replica_id = this
6749                .collaborators
6750                .remove(&peer_id)
6751                .ok_or_else(|| anyhow!("unknown peer {:?}", peer_id))?
6752                .replica_id;
6753            for buffer in this.opened_buffers.values() {
6754                if let Some(buffer) = buffer.upgrade() {
6755                    buffer.update(cx, |buffer, cx| buffer.remove_peer(replica_id, cx));
6756                }
6757            }
6758            this.shared_buffers.remove(&peer_id);
6759
6760            cx.emit(Event::CollaboratorLeft(peer_id));
6761            cx.notify();
6762            Ok(())
6763        })?
6764    }
6765
6766    async fn handle_update_project(
6767        this: Model<Self>,
6768        envelope: TypedEnvelope<proto::UpdateProject>,
6769        _: Arc<Client>,
6770        mut cx: AsyncAppContext,
6771    ) -> Result<()> {
6772        this.update(&mut cx, |this, cx| {
6773            // Don't handle messages that were sent before the response to us joining the project
6774            if envelope.message_id > this.join_project_response_message_id {
6775                this.set_worktrees_from_proto(envelope.payload.worktrees, cx)?;
6776            }
6777            Ok(())
6778        })?
6779    }
6780
6781    async fn handle_update_worktree(
6782        this: Model<Self>,
6783        envelope: TypedEnvelope<proto::UpdateWorktree>,
6784        _: Arc<Client>,
6785        mut cx: AsyncAppContext,
6786    ) -> Result<()> {
6787        this.update(&mut cx, |this, cx| {
6788            let worktree_id = WorktreeId::from_proto(envelope.payload.worktree_id);
6789            if let Some(worktree) = this.worktree_for_id(worktree_id, cx) {
6790                worktree.update(cx, |worktree, _| {
6791                    let worktree = worktree.as_remote_mut().unwrap();
6792                    worktree.update_from_remote(envelope.payload);
6793                });
6794            }
6795            Ok(())
6796        })?
6797    }
6798
6799    async fn handle_update_worktree_settings(
6800        this: Model<Self>,
6801        envelope: TypedEnvelope<proto::UpdateWorktreeSettings>,
6802        _: Arc<Client>,
6803        mut cx: AsyncAppContext,
6804    ) -> Result<()> {
6805        this.update(&mut cx, |this, cx| {
6806            let worktree_id = WorktreeId::from_proto(envelope.payload.worktree_id);
6807            if let Some(worktree) = this.worktree_for_id(worktree_id, cx) {
6808                cx.update_global::<SettingsStore, _>(|store, cx| {
6809                    store
6810                        .set_local_settings(
6811                            worktree.entity_id().as_u64() as usize,
6812                            PathBuf::from(&envelope.payload.path).into(),
6813                            envelope.payload.content.as_ref().map(String::as_str),
6814                            cx,
6815                        )
6816                        .log_err();
6817                });
6818            }
6819            Ok(())
6820        })?
6821    }
6822
6823    async fn handle_create_project_entry(
6824        this: Model<Self>,
6825        envelope: TypedEnvelope<proto::CreateProjectEntry>,
6826        _: Arc<Client>,
6827        mut cx: AsyncAppContext,
6828    ) -> Result<proto::ProjectEntryResponse> {
6829        let worktree = this.update(&mut cx, |this, cx| {
6830            let worktree_id = WorktreeId::from_proto(envelope.payload.worktree_id);
6831            this.worktree_for_id(worktree_id, cx)
6832                .ok_or_else(|| anyhow!("worktree not found"))
6833        })??;
6834        let worktree_scan_id = worktree.update(&mut cx, |worktree, _| worktree.scan_id())?;
6835        let entry = worktree
6836            .update(&mut cx, |worktree, cx| {
6837                let worktree = worktree.as_local_mut().unwrap();
6838                let path = PathBuf::from(envelope.payload.path);
6839                worktree.create_entry(path, envelope.payload.is_directory, cx)
6840            })?
6841            .await?;
6842        Ok(proto::ProjectEntryResponse {
6843            entry: Some((&entry).into()),
6844            worktree_scan_id: worktree_scan_id as u64,
6845        })
6846    }
6847
6848    async fn handle_rename_project_entry(
6849        this: Model<Self>,
6850        envelope: TypedEnvelope<proto::RenameProjectEntry>,
6851        _: Arc<Client>,
6852        mut cx: AsyncAppContext,
6853    ) -> Result<proto::ProjectEntryResponse> {
6854        let entry_id = ProjectEntryId::from_proto(envelope.payload.entry_id);
6855        let worktree = this.update(&mut cx, |this, cx| {
6856            this.worktree_for_entry(entry_id, cx)
6857                .ok_or_else(|| anyhow!("worktree not found"))
6858        })??;
6859        let worktree_scan_id = worktree.update(&mut cx, |worktree, _| worktree.scan_id())?;
6860        let entry = worktree
6861            .update(&mut cx, |worktree, cx| {
6862                let new_path = PathBuf::from(envelope.payload.new_path);
6863                worktree
6864                    .as_local_mut()
6865                    .unwrap()
6866                    .rename_entry(entry_id, new_path, cx)
6867                    .ok_or_else(|| anyhow!("invalid entry"))
6868            })??
6869            .await?;
6870        Ok(proto::ProjectEntryResponse {
6871            entry: Some((&entry).into()),
6872            worktree_scan_id: worktree_scan_id as u64,
6873        })
6874    }
6875
6876    async fn handle_copy_project_entry(
6877        this: Model<Self>,
6878        envelope: TypedEnvelope<proto::CopyProjectEntry>,
6879        _: Arc<Client>,
6880        mut cx: AsyncAppContext,
6881    ) -> Result<proto::ProjectEntryResponse> {
6882        let entry_id = ProjectEntryId::from_proto(envelope.payload.entry_id);
6883        let worktree = this.update(&mut cx, |this, cx| {
6884            this.worktree_for_entry(entry_id, cx)
6885                .ok_or_else(|| anyhow!("worktree not found"))
6886        })??;
6887        let worktree_scan_id = worktree.update(&mut cx, |worktree, _| worktree.scan_id())?;
6888        let entry = worktree
6889            .update(&mut cx, |worktree, cx| {
6890                let new_path = PathBuf::from(envelope.payload.new_path);
6891                worktree
6892                    .as_local_mut()
6893                    .unwrap()
6894                    .copy_entry(entry_id, new_path, cx)
6895                    .ok_or_else(|| anyhow!("invalid entry"))
6896            })??
6897            .await?;
6898        Ok(proto::ProjectEntryResponse {
6899            entry: Some((&entry).into()),
6900            worktree_scan_id: worktree_scan_id as u64,
6901        })
6902    }
6903
6904    async fn handle_delete_project_entry(
6905        this: Model<Self>,
6906        envelope: TypedEnvelope<proto::DeleteProjectEntry>,
6907        _: Arc<Client>,
6908        mut cx: AsyncAppContext,
6909    ) -> Result<proto::ProjectEntryResponse> {
6910        let entry_id = ProjectEntryId::from_proto(envelope.payload.entry_id);
6911
6912        this.update(&mut cx, |_, cx| cx.emit(Event::DeletedEntry(entry_id)))?;
6913
6914        let worktree = this.update(&mut cx, |this, cx| {
6915            this.worktree_for_entry(entry_id, cx)
6916                .ok_or_else(|| anyhow!("worktree not found"))
6917        })??;
6918        let worktree_scan_id = worktree.update(&mut cx, |worktree, _| worktree.scan_id())?;
6919        worktree
6920            .update(&mut cx, |worktree, cx| {
6921                worktree
6922                    .as_local_mut()
6923                    .unwrap()
6924                    .delete_entry(entry_id, cx)
6925                    .ok_or_else(|| anyhow!("invalid entry"))
6926            })??
6927            .await?;
6928        Ok(proto::ProjectEntryResponse {
6929            entry: None,
6930            worktree_scan_id: worktree_scan_id as u64,
6931        })
6932    }
6933
6934    async fn handle_expand_project_entry(
6935        this: Model<Self>,
6936        envelope: TypedEnvelope<proto::ExpandProjectEntry>,
6937        _: Arc<Client>,
6938        mut cx: AsyncAppContext,
6939    ) -> Result<proto::ExpandProjectEntryResponse> {
6940        let entry_id = ProjectEntryId::from_proto(envelope.payload.entry_id);
6941        let worktree = this
6942            .update(&mut cx, |this, cx| this.worktree_for_entry(entry_id, cx))?
6943            .ok_or_else(|| anyhow!("invalid request"))?;
6944        worktree
6945            .update(&mut cx, |worktree, cx| {
6946                worktree
6947                    .as_local_mut()
6948                    .unwrap()
6949                    .expand_entry(entry_id, cx)
6950                    .ok_or_else(|| anyhow!("invalid entry"))
6951            })??
6952            .await?;
6953        let worktree_scan_id = worktree.update(&mut cx, |worktree, _| worktree.scan_id())? as u64;
6954        Ok(proto::ExpandProjectEntryResponse { worktree_scan_id })
6955    }
6956
6957    async fn handle_update_diagnostic_summary(
6958        this: Model<Self>,
6959        envelope: TypedEnvelope<proto::UpdateDiagnosticSummary>,
6960        _: Arc<Client>,
6961        mut cx: AsyncAppContext,
6962    ) -> Result<()> {
6963        this.update(&mut cx, |this, cx| {
6964            let worktree_id = WorktreeId::from_proto(envelope.payload.worktree_id);
6965            if let Some(worktree) = this.worktree_for_id(worktree_id, cx) {
6966                if let Some(summary) = envelope.payload.summary {
6967                    let project_path = ProjectPath {
6968                        worktree_id,
6969                        path: Path::new(&summary.path).into(),
6970                    };
6971                    worktree.update(cx, |worktree, _| {
6972                        worktree
6973                            .as_remote_mut()
6974                            .unwrap()
6975                            .update_diagnostic_summary(project_path.path.clone(), &summary);
6976                    });
6977                    cx.emit(Event::DiagnosticsUpdated {
6978                        language_server_id: LanguageServerId(summary.language_server_id as usize),
6979                        path: project_path,
6980                    });
6981                }
6982            }
6983            Ok(())
6984        })?
6985    }
6986
6987    async fn handle_start_language_server(
6988        this: Model<Self>,
6989        envelope: TypedEnvelope<proto::StartLanguageServer>,
6990        _: Arc<Client>,
6991        mut cx: AsyncAppContext,
6992    ) -> Result<()> {
6993        let server = envelope
6994            .payload
6995            .server
6996            .ok_or_else(|| anyhow!("invalid server"))?;
6997        this.update(&mut cx, |this, cx| {
6998            this.language_server_statuses.insert(
6999                LanguageServerId(server.id as usize),
7000                LanguageServerStatus {
7001                    name: server.name,
7002                    pending_work: Default::default(),
7003                    has_pending_diagnostic_updates: false,
7004                    progress_tokens: Default::default(),
7005                },
7006            );
7007            cx.notify();
7008        })?;
7009        Ok(())
7010    }
7011
7012    async fn handle_update_language_server(
7013        this: Model<Self>,
7014        envelope: TypedEnvelope<proto::UpdateLanguageServer>,
7015        _: Arc<Client>,
7016        mut cx: AsyncAppContext,
7017    ) -> Result<()> {
7018        this.update(&mut cx, |this, cx| {
7019            let language_server_id = LanguageServerId(envelope.payload.language_server_id as usize);
7020
7021            match envelope
7022                .payload
7023                .variant
7024                .ok_or_else(|| anyhow!("invalid variant"))?
7025            {
7026                proto::update_language_server::Variant::WorkStart(payload) => {
7027                    this.on_lsp_work_start(
7028                        language_server_id,
7029                        payload.token,
7030                        LanguageServerProgress {
7031                            message: payload.message,
7032                            percentage: payload.percentage.map(|p| p as usize),
7033                            last_update_at: Instant::now(),
7034                        },
7035                        cx,
7036                    );
7037                }
7038
7039                proto::update_language_server::Variant::WorkProgress(payload) => {
7040                    this.on_lsp_work_progress(
7041                        language_server_id,
7042                        payload.token,
7043                        LanguageServerProgress {
7044                            message: payload.message,
7045                            percentage: payload.percentage.map(|p| p as usize),
7046                            last_update_at: Instant::now(),
7047                        },
7048                        cx,
7049                    );
7050                }
7051
7052                proto::update_language_server::Variant::WorkEnd(payload) => {
7053                    this.on_lsp_work_end(language_server_id, payload.token, cx);
7054                }
7055
7056                proto::update_language_server::Variant::DiskBasedDiagnosticsUpdating(_) => {
7057                    this.disk_based_diagnostics_started(language_server_id, cx);
7058                }
7059
7060                proto::update_language_server::Variant::DiskBasedDiagnosticsUpdated(_) => {
7061                    this.disk_based_diagnostics_finished(language_server_id, cx)
7062                }
7063            }
7064
7065            Ok(())
7066        })?
7067    }
7068
7069    async fn handle_update_buffer(
7070        this: Model<Self>,
7071        envelope: TypedEnvelope<proto::UpdateBuffer>,
7072        _: Arc<Client>,
7073        mut cx: AsyncAppContext,
7074    ) -> Result<proto::Ack> {
7075        this.update(&mut cx, |this, cx| {
7076            let payload = envelope.payload.clone();
7077            let buffer_id = payload.buffer_id;
7078            let ops = payload
7079                .operations
7080                .into_iter()
7081                .map(language::proto::deserialize_operation)
7082                .collect::<Result<Vec<_>, _>>()?;
7083            let is_remote = this.is_remote();
7084            match this.opened_buffers.entry(buffer_id) {
7085                hash_map::Entry::Occupied(mut e) => match e.get_mut() {
7086                    OpenBuffer::Strong(buffer) => {
7087                        buffer.update(cx, |buffer, cx| buffer.apply_ops(ops, cx))?;
7088                    }
7089                    OpenBuffer::Operations(operations) => operations.extend_from_slice(&ops),
7090                    OpenBuffer::Weak(_) => {}
7091                },
7092                hash_map::Entry::Vacant(e) => {
7093                    assert!(
7094                        is_remote,
7095                        "received buffer update from {:?}",
7096                        envelope.original_sender_id
7097                    );
7098                    e.insert(OpenBuffer::Operations(ops));
7099                }
7100            }
7101            Ok(proto::Ack {})
7102        })?
7103    }
7104
7105    async fn handle_create_buffer_for_peer(
7106        this: Model<Self>,
7107        envelope: TypedEnvelope<proto::CreateBufferForPeer>,
7108        _: Arc<Client>,
7109        mut cx: AsyncAppContext,
7110    ) -> Result<()> {
7111        this.update(&mut cx, |this, cx| {
7112            match envelope
7113                .payload
7114                .variant
7115                .ok_or_else(|| anyhow!("missing variant"))?
7116            {
7117                proto::create_buffer_for_peer::Variant::State(mut state) => {
7118                    let mut buffer_file = None;
7119                    if let Some(file) = state.file.take() {
7120                        let worktree_id = WorktreeId::from_proto(file.worktree_id);
7121                        let worktree = this.worktree_for_id(worktree_id, cx).ok_or_else(|| {
7122                            anyhow!("no worktree found for id {}", file.worktree_id)
7123                        })?;
7124                        buffer_file = Some(Arc::new(File::from_proto(file, worktree.clone(), cx)?)
7125                            as Arc<dyn language::File>);
7126                    }
7127
7128                    let buffer_id = state.id;
7129                    let buffer = cx.build_model(|_| {
7130                        Buffer::from_proto(this.replica_id(), state, buffer_file).unwrap()
7131                    });
7132                    this.incomplete_remote_buffers
7133                        .insert(buffer_id, Some(buffer));
7134                }
7135                proto::create_buffer_for_peer::Variant::Chunk(chunk) => {
7136                    let buffer = this
7137                        .incomplete_remote_buffers
7138                        .get(&chunk.buffer_id)
7139                        .cloned()
7140                        .flatten()
7141                        .ok_or_else(|| {
7142                            anyhow!(
7143                                "received chunk for buffer {} without initial state",
7144                                chunk.buffer_id
7145                            )
7146                        })?;
7147                    let operations = chunk
7148                        .operations
7149                        .into_iter()
7150                        .map(language::proto::deserialize_operation)
7151                        .collect::<Result<Vec<_>>>()?;
7152                    buffer.update(cx, |buffer, cx| buffer.apply_ops(operations, cx))?;
7153
7154                    if chunk.is_last {
7155                        this.incomplete_remote_buffers.remove(&chunk.buffer_id);
7156                        this.register_buffer(&buffer, cx)?;
7157                    }
7158                }
7159            }
7160
7161            Ok(())
7162        })?
7163    }
7164
7165    async fn handle_update_diff_base(
7166        this: Model<Self>,
7167        envelope: TypedEnvelope<proto::UpdateDiffBase>,
7168        _: Arc<Client>,
7169        mut cx: AsyncAppContext,
7170    ) -> Result<()> {
7171        this.update(&mut cx, |this, cx| {
7172            let buffer_id = envelope.payload.buffer_id;
7173            let diff_base = envelope.payload.diff_base;
7174            if let Some(buffer) = this
7175                .opened_buffers
7176                .get_mut(&buffer_id)
7177                .and_then(|b| b.upgrade())
7178                .or_else(|| {
7179                    this.incomplete_remote_buffers
7180                        .get(&buffer_id)
7181                        .cloned()
7182                        .flatten()
7183                })
7184            {
7185                buffer.update(cx, |buffer, cx| buffer.set_diff_base(diff_base, cx));
7186            }
7187            Ok(())
7188        })?
7189    }
7190
7191    async fn handle_update_buffer_file(
7192        this: Model<Self>,
7193        envelope: TypedEnvelope<proto::UpdateBufferFile>,
7194        _: Arc<Client>,
7195        mut cx: AsyncAppContext,
7196    ) -> Result<()> {
7197        let buffer_id = envelope.payload.buffer_id;
7198
7199        this.update(&mut cx, |this, cx| {
7200            let payload = envelope.payload.clone();
7201            if let Some(buffer) = this
7202                .opened_buffers
7203                .get(&buffer_id)
7204                .and_then(|b| b.upgrade())
7205                .or_else(|| {
7206                    this.incomplete_remote_buffers
7207                        .get(&buffer_id)
7208                        .cloned()
7209                        .flatten()
7210                })
7211            {
7212                let file = payload.file.ok_or_else(|| anyhow!("invalid file"))?;
7213                let worktree = this
7214                    .worktree_for_id(WorktreeId::from_proto(file.worktree_id), cx)
7215                    .ok_or_else(|| anyhow!("no such worktree"))?;
7216                let file = File::from_proto(file, worktree, cx)?;
7217                buffer.update(cx, |buffer, cx| {
7218                    buffer.file_updated(Arc::new(file), cx).detach();
7219                });
7220                this.detect_language_for_buffer(&buffer, cx);
7221            }
7222            Ok(())
7223        })?
7224    }
7225
7226    async fn handle_save_buffer(
7227        this: Model<Self>,
7228        envelope: TypedEnvelope<proto::SaveBuffer>,
7229        _: Arc<Client>,
7230        mut cx: AsyncAppContext,
7231    ) -> Result<proto::BufferSaved> {
7232        let buffer_id = envelope.payload.buffer_id;
7233        let (project_id, buffer) = this.update(&mut cx, |this, _cx| {
7234            let project_id = this.remote_id().ok_or_else(|| anyhow!("not connected"))?;
7235            let buffer = this
7236                .opened_buffers
7237                .get(&buffer_id)
7238                .and_then(|buffer| buffer.upgrade())
7239                .ok_or_else(|| anyhow!("unknown buffer id {}", buffer_id))?;
7240            anyhow::Ok((project_id, buffer))
7241        })??;
7242        buffer
7243            .update(&mut cx, |buffer, _| {
7244                buffer.wait_for_version(deserialize_version(&envelope.payload.version))
7245            })?
7246            .await?;
7247        let buffer_id = buffer.update(&mut cx, |buffer, _| buffer.remote_id())?;
7248
7249        this.update(&mut cx, |this, cx| this.save_buffer(buffer.clone(), cx))?
7250            .await?;
7251        Ok(buffer.update(&mut cx, |buffer, _| proto::BufferSaved {
7252            project_id,
7253            buffer_id,
7254            version: serialize_version(buffer.saved_version()),
7255            mtime: Some(buffer.saved_mtime().into()),
7256            fingerprint: language::proto::serialize_fingerprint(buffer.saved_version_fingerprint()),
7257        })?)
7258    }
7259
7260    async fn handle_reload_buffers(
7261        this: Model<Self>,
7262        envelope: TypedEnvelope<proto::ReloadBuffers>,
7263        _: Arc<Client>,
7264        mut cx: AsyncAppContext,
7265    ) -> Result<proto::ReloadBuffersResponse> {
7266        let sender_id = envelope.original_sender_id()?;
7267        let reload = this.update(&mut cx, |this, cx| {
7268            let mut buffers = HashSet::default();
7269            for buffer_id in &envelope.payload.buffer_ids {
7270                buffers.insert(
7271                    this.opened_buffers
7272                        .get(buffer_id)
7273                        .and_then(|buffer| buffer.upgrade())
7274                        .ok_or_else(|| anyhow!("unknown buffer id {}", buffer_id))?,
7275                );
7276            }
7277            Ok::<_, anyhow::Error>(this.reload_buffers(buffers, false, cx))
7278        })??;
7279
7280        let project_transaction = reload.await?;
7281        let project_transaction = this.update(&mut cx, |this, cx| {
7282            this.serialize_project_transaction_for_peer(project_transaction, sender_id, cx)
7283        })?;
7284        Ok(proto::ReloadBuffersResponse {
7285            transaction: Some(project_transaction),
7286        })
7287    }
7288
7289    async fn handle_synchronize_buffers(
7290        this: Model<Self>,
7291        envelope: TypedEnvelope<proto::SynchronizeBuffers>,
7292        _: Arc<Client>,
7293        mut cx: AsyncAppContext,
7294    ) -> Result<proto::SynchronizeBuffersResponse> {
7295        let project_id = envelope.payload.project_id;
7296        let mut response = proto::SynchronizeBuffersResponse {
7297            buffers: Default::default(),
7298        };
7299
7300        this.update(&mut cx, |this, cx| {
7301            let Some(guest_id) = envelope.original_sender_id else {
7302                error!("missing original_sender_id on SynchronizeBuffers request");
7303                return;
7304            };
7305
7306            this.shared_buffers.entry(guest_id).or_default().clear();
7307            for buffer in envelope.payload.buffers {
7308                let buffer_id = buffer.id;
7309                let remote_version = language::proto::deserialize_version(&buffer.version);
7310                if let Some(buffer) = this.buffer_for_id(buffer_id) {
7311                    this.shared_buffers
7312                        .entry(guest_id)
7313                        .or_default()
7314                        .insert(buffer_id);
7315
7316                    let buffer = buffer.read(cx);
7317                    response.buffers.push(proto::BufferVersion {
7318                        id: buffer_id,
7319                        version: language::proto::serialize_version(&buffer.version),
7320                    });
7321
7322                    let operations = buffer.serialize_ops(Some(remote_version), cx);
7323                    let client = this.client.clone();
7324                    if let Some(file) = buffer.file() {
7325                        client
7326                            .send(proto::UpdateBufferFile {
7327                                project_id,
7328                                buffer_id: buffer_id as u64,
7329                                file: Some(file.to_proto()),
7330                            })
7331                            .log_err();
7332                    }
7333
7334                    client
7335                        .send(proto::UpdateDiffBase {
7336                            project_id,
7337                            buffer_id: buffer_id as u64,
7338                            diff_base: buffer.diff_base().map(Into::into),
7339                        })
7340                        .log_err();
7341
7342                    client
7343                        .send(proto::BufferReloaded {
7344                            project_id,
7345                            buffer_id,
7346                            version: language::proto::serialize_version(buffer.saved_version()),
7347                            mtime: Some(buffer.saved_mtime().into()),
7348                            fingerprint: language::proto::serialize_fingerprint(
7349                                buffer.saved_version_fingerprint(),
7350                            ),
7351                            line_ending: language::proto::serialize_line_ending(
7352                                buffer.line_ending(),
7353                            ) as i32,
7354                        })
7355                        .log_err();
7356
7357                    cx.background_executor()
7358                        .spawn(
7359                            async move {
7360                                let operations = operations.await;
7361                                for chunk in split_operations(operations) {
7362                                    client
7363                                        .request(proto::UpdateBuffer {
7364                                            project_id,
7365                                            buffer_id,
7366                                            operations: chunk,
7367                                        })
7368                                        .await?;
7369                                }
7370                                anyhow::Ok(())
7371                            }
7372                            .log_err(),
7373                        )
7374                        .detach();
7375                }
7376            }
7377        })?;
7378
7379        Ok(response)
7380    }
7381
7382    async fn handle_format_buffers(
7383        this: Model<Self>,
7384        envelope: TypedEnvelope<proto::FormatBuffers>,
7385        _: Arc<Client>,
7386        mut cx: AsyncAppContext,
7387    ) -> Result<proto::FormatBuffersResponse> {
7388        let sender_id = envelope.original_sender_id()?;
7389        let format = this.update(&mut cx, |this, cx| {
7390            let mut buffers = HashSet::default();
7391            for buffer_id in &envelope.payload.buffer_ids {
7392                buffers.insert(
7393                    this.opened_buffers
7394                        .get(buffer_id)
7395                        .and_then(|buffer| buffer.upgrade())
7396                        .ok_or_else(|| anyhow!("unknown buffer id {}", buffer_id))?,
7397                );
7398            }
7399            let trigger = FormatTrigger::from_proto(envelope.payload.trigger);
7400            Ok::<_, anyhow::Error>(this.format(buffers, false, trigger, cx))
7401        })??;
7402
7403        let project_transaction = format.await?;
7404        let project_transaction = this.update(&mut cx, |this, cx| {
7405            this.serialize_project_transaction_for_peer(project_transaction, sender_id, cx)
7406        })?;
7407        Ok(proto::FormatBuffersResponse {
7408            transaction: Some(project_transaction),
7409        })
7410    }
7411
7412    async fn handle_apply_additional_edits_for_completion(
7413        this: Model<Self>,
7414        envelope: TypedEnvelope<proto::ApplyCompletionAdditionalEdits>,
7415        _: Arc<Client>,
7416        mut cx: AsyncAppContext,
7417    ) -> Result<proto::ApplyCompletionAdditionalEditsResponse> {
7418        let (buffer, completion) = this.update(&mut cx, |this, cx| {
7419            let buffer = this
7420                .opened_buffers
7421                .get(&envelope.payload.buffer_id)
7422                .and_then(|buffer| buffer.upgrade())
7423                .ok_or_else(|| anyhow!("unknown buffer id {}", envelope.payload.buffer_id))?;
7424            let language = buffer.read(cx).language();
7425            let completion = language::proto::deserialize_completion(
7426                envelope
7427                    .payload
7428                    .completion
7429                    .ok_or_else(|| anyhow!("invalid completion"))?,
7430                language.cloned(),
7431            );
7432            Ok::<_, anyhow::Error>((buffer, completion))
7433        })??;
7434
7435        let completion = completion.await?;
7436
7437        let apply_additional_edits = this.update(&mut cx, |this, cx| {
7438            this.apply_additional_edits_for_completion(buffer, completion, false, cx)
7439        })?;
7440
7441        Ok(proto::ApplyCompletionAdditionalEditsResponse {
7442            transaction: apply_additional_edits
7443                .await?
7444                .as_ref()
7445                .map(language::proto::serialize_transaction),
7446        })
7447    }
7448
7449    async fn handle_apply_code_action(
7450        this: Model<Self>,
7451        envelope: TypedEnvelope<proto::ApplyCodeAction>,
7452        _: Arc<Client>,
7453        mut cx: AsyncAppContext,
7454    ) -> Result<proto::ApplyCodeActionResponse> {
7455        let sender_id = envelope.original_sender_id()?;
7456        let action = language::proto::deserialize_code_action(
7457            envelope
7458                .payload
7459                .action
7460                .ok_or_else(|| anyhow!("invalid action"))?,
7461        )?;
7462        let apply_code_action = this.update(&mut cx, |this, cx| {
7463            let buffer = this
7464                .opened_buffers
7465                .get(&envelope.payload.buffer_id)
7466                .and_then(|buffer| buffer.upgrade())
7467                .ok_or_else(|| anyhow!("unknown buffer id {}", envelope.payload.buffer_id))?;
7468            Ok::<_, anyhow::Error>(this.apply_code_action(buffer, action, false, cx))
7469        })??;
7470
7471        let project_transaction = apply_code_action.await?;
7472        let project_transaction = this.update(&mut cx, |this, cx| {
7473            this.serialize_project_transaction_for_peer(project_transaction, sender_id, cx)
7474        })?;
7475        Ok(proto::ApplyCodeActionResponse {
7476            transaction: Some(project_transaction),
7477        })
7478    }
7479
7480    async fn handle_on_type_formatting(
7481        this: Model<Self>,
7482        envelope: TypedEnvelope<proto::OnTypeFormatting>,
7483        _: Arc<Client>,
7484        mut cx: AsyncAppContext,
7485    ) -> Result<proto::OnTypeFormattingResponse> {
7486        let on_type_formatting = this.update(&mut cx, |this, cx| {
7487            let buffer = this
7488                .opened_buffers
7489                .get(&envelope.payload.buffer_id)
7490                .and_then(|buffer| buffer.upgrade())
7491                .ok_or_else(|| anyhow!("unknown buffer id {}", envelope.payload.buffer_id))?;
7492            let position = envelope
7493                .payload
7494                .position
7495                .and_then(deserialize_anchor)
7496                .ok_or_else(|| anyhow!("invalid position"))?;
7497            Ok::<_, anyhow::Error>(this.apply_on_type_formatting(
7498                buffer,
7499                position,
7500                envelope.payload.trigger.clone(),
7501                cx,
7502            ))
7503        })??;
7504
7505        let transaction = on_type_formatting
7506            .await?
7507            .as_ref()
7508            .map(language::proto::serialize_transaction);
7509        Ok(proto::OnTypeFormattingResponse { transaction })
7510    }
7511
7512    async fn handle_inlay_hints(
7513        this: Model<Self>,
7514        envelope: TypedEnvelope<proto::InlayHints>,
7515        _: Arc<Client>,
7516        mut cx: AsyncAppContext,
7517    ) -> Result<proto::InlayHintsResponse> {
7518        let sender_id = envelope.original_sender_id()?;
7519        let buffer = this.update(&mut cx, |this, _| {
7520            this.opened_buffers
7521                .get(&envelope.payload.buffer_id)
7522                .and_then(|buffer| buffer.upgrade())
7523                .ok_or_else(|| anyhow!("unknown buffer id {}", envelope.payload.buffer_id))
7524        })??;
7525        let buffer_version = deserialize_version(&envelope.payload.version);
7526
7527        buffer
7528            .update(&mut cx, |buffer, _| {
7529                buffer.wait_for_version(buffer_version.clone())
7530            })?
7531            .await
7532            .with_context(|| {
7533                format!(
7534                    "waiting for version {:?} for buffer {}",
7535                    buffer_version,
7536                    buffer.entity_id()
7537                )
7538            })?;
7539
7540        let start = envelope
7541            .payload
7542            .start
7543            .and_then(deserialize_anchor)
7544            .context("missing range start")?;
7545        let end = envelope
7546            .payload
7547            .end
7548            .and_then(deserialize_anchor)
7549            .context("missing range end")?;
7550        let buffer_hints = this
7551            .update(&mut cx, |project, cx| {
7552                project.inlay_hints(buffer, start..end, cx)
7553            })?
7554            .await
7555            .context("inlay hints fetch")?;
7556
7557        Ok(this.update(&mut cx, |project, cx| {
7558            InlayHints::response_to_proto(buffer_hints, project, sender_id, &buffer_version, cx)
7559        })?)
7560    }
7561
7562    async fn handle_resolve_inlay_hint(
7563        this: Model<Self>,
7564        envelope: TypedEnvelope<proto::ResolveInlayHint>,
7565        _: Arc<Client>,
7566        mut cx: AsyncAppContext,
7567    ) -> Result<proto::ResolveInlayHintResponse> {
7568        let proto_hint = envelope
7569            .payload
7570            .hint
7571            .expect("incorrect protobuf resolve inlay hint message: missing the inlay hint");
7572        let hint = InlayHints::proto_to_project_hint(proto_hint)
7573            .context("resolved proto inlay hint conversion")?;
7574        let buffer = this.update(&mut cx, |this, _cx| {
7575            this.opened_buffers
7576                .get(&envelope.payload.buffer_id)
7577                .and_then(|buffer| buffer.upgrade())
7578                .ok_or_else(|| anyhow!("unknown buffer id {}", envelope.payload.buffer_id))
7579        })??;
7580        let response_hint = this
7581            .update(&mut cx, |project, cx| {
7582                project.resolve_inlay_hint(
7583                    hint,
7584                    buffer,
7585                    LanguageServerId(envelope.payload.language_server_id as usize),
7586                    cx,
7587                )
7588            })?
7589            .await
7590            .context("inlay hints fetch")?;
7591        Ok(proto::ResolveInlayHintResponse {
7592            hint: Some(InlayHints::project_to_proto_hint(response_hint)),
7593        })
7594    }
7595
7596    async fn handle_refresh_inlay_hints(
7597        this: Model<Self>,
7598        _: TypedEnvelope<proto::RefreshInlayHints>,
7599        _: Arc<Client>,
7600        mut cx: AsyncAppContext,
7601    ) -> Result<proto::Ack> {
7602        this.update(&mut cx, |_, cx| {
7603            cx.emit(Event::RefreshInlayHints);
7604        })?;
7605        Ok(proto::Ack {})
7606    }
7607
7608    async fn handle_lsp_command<T: LspCommand>(
7609        this: Model<Self>,
7610        envelope: TypedEnvelope<T::ProtoRequest>,
7611        _: Arc<Client>,
7612        mut cx: AsyncAppContext,
7613    ) -> Result<<T::ProtoRequest as proto::RequestMessage>::Response>
7614    where
7615        <T::LspRequest as lsp::request::Request>::Params: Send,
7616        <T::LspRequest as lsp::request::Request>::Result: Send,
7617    {
7618        let sender_id = envelope.original_sender_id()?;
7619        let buffer_id = T::buffer_id_from_proto(&envelope.payload);
7620        let buffer_handle = this.update(&mut cx, |this, _cx| {
7621            this.opened_buffers
7622                .get(&buffer_id)
7623                .and_then(|buffer| buffer.upgrade())
7624                .ok_or_else(|| anyhow!("unknown buffer id {}", buffer_id))
7625        })??;
7626        let request = T::from_proto(
7627            envelope.payload,
7628            this.clone(),
7629            buffer_handle.clone(),
7630            cx.clone(),
7631        )
7632        .await?;
7633        let buffer_version = buffer_handle.update(&mut cx, |buffer, _| buffer.version())?;
7634        let response = this
7635            .update(&mut cx, |this, cx| {
7636                this.request_lsp(buffer_handle, LanguageServerToQuery::Primary, request, cx)
7637            })?
7638            .await?;
7639        this.update(&mut cx, |this, cx| {
7640            Ok(T::response_to_proto(
7641                response,
7642                this,
7643                sender_id,
7644                &buffer_version,
7645                cx,
7646            ))
7647        })?
7648    }
7649
7650    async fn handle_get_project_symbols(
7651        this: Model<Self>,
7652        envelope: TypedEnvelope<proto::GetProjectSymbols>,
7653        _: Arc<Client>,
7654        mut cx: AsyncAppContext,
7655    ) -> Result<proto::GetProjectSymbolsResponse> {
7656        let symbols = this
7657            .update(&mut cx, |this, cx| {
7658                this.symbols(&envelope.payload.query, cx)
7659            })?
7660            .await?;
7661
7662        Ok(proto::GetProjectSymbolsResponse {
7663            symbols: symbols.iter().map(serialize_symbol).collect(),
7664        })
7665    }
7666
7667    async fn handle_search_project(
7668        this: Model<Self>,
7669        envelope: TypedEnvelope<proto::SearchProject>,
7670        _: Arc<Client>,
7671        mut cx: AsyncAppContext,
7672    ) -> Result<proto::SearchProjectResponse> {
7673        let peer_id = envelope.original_sender_id()?;
7674        let query = SearchQuery::from_proto(envelope.payload)?;
7675        let mut result = this.update(&mut cx, |this, cx| this.search(query, cx))?;
7676
7677        cx.spawn(move |mut cx| async move {
7678            let mut locations = Vec::new();
7679            while let Some((buffer, ranges)) = result.next().await {
7680                for range in ranges {
7681                    let start = serialize_anchor(&range.start);
7682                    let end = serialize_anchor(&range.end);
7683                    let buffer_id = this.update(&mut cx, |this, cx| {
7684                        this.create_buffer_for_peer(&buffer, peer_id, cx)
7685                    })?;
7686                    locations.push(proto::Location {
7687                        buffer_id,
7688                        start: Some(start),
7689                        end: Some(end),
7690                    });
7691                }
7692            }
7693            Ok(proto::SearchProjectResponse { locations })
7694        })
7695        .await
7696    }
7697
7698    async fn handle_open_buffer_for_symbol(
7699        this: Model<Self>,
7700        envelope: TypedEnvelope<proto::OpenBufferForSymbol>,
7701        _: Arc<Client>,
7702        mut cx: AsyncAppContext,
7703    ) -> Result<proto::OpenBufferForSymbolResponse> {
7704        let peer_id = envelope.original_sender_id()?;
7705        let symbol = envelope
7706            .payload
7707            .symbol
7708            .ok_or_else(|| anyhow!("invalid symbol"))?;
7709        let symbol = this
7710            .update(&mut cx, |this, _| this.deserialize_symbol(symbol))?
7711            .await?;
7712        let symbol = this.update(&mut cx, |this, _| {
7713            let signature = this.symbol_signature(&symbol.path);
7714            if signature == symbol.signature {
7715                Ok(symbol)
7716            } else {
7717                Err(anyhow!("invalid symbol signature"))
7718            }
7719        })??;
7720        let buffer = this
7721            .update(&mut cx, |this, cx| this.open_buffer_for_symbol(&symbol, cx))?
7722            .await?;
7723
7724        Ok(proto::OpenBufferForSymbolResponse {
7725            buffer_id: this.update(&mut cx, |this, cx| {
7726                this.create_buffer_for_peer(&buffer, peer_id, cx)
7727            })?,
7728        })
7729    }
7730
7731    fn symbol_signature(&self, project_path: &ProjectPath) -> [u8; 32] {
7732        let mut hasher = Sha256::new();
7733        hasher.update(project_path.worktree_id.to_proto().to_be_bytes());
7734        hasher.update(project_path.path.to_string_lossy().as_bytes());
7735        hasher.update(self.nonce.to_be_bytes());
7736        hasher.finalize().as_slice().try_into().unwrap()
7737    }
7738
7739    async fn handle_open_buffer_by_id(
7740        this: Model<Self>,
7741        envelope: TypedEnvelope<proto::OpenBufferById>,
7742        _: Arc<Client>,
7743        mut cx: AsyncAppContext,
7744    ) -> Result<proto::OpenBufferResponse> {
7745        let peer_id = envelope.original_sender_id()?;
7746        let buffer = this
7747            .update(&mut cx, |this, cx| {
7748                this.open_buffer_by_id(envelope.payload.id, cx)
7749            })?
7750            .await?;
7751        this.update(&mut cx, |this, cx| {
7752            Ok(proto::OpenBufferResponse {
7753                buffer_id: this.create_buffer_for_peer(&buffer, peer_id, cx),
7754            })
7755        })?
7756    }
7757
7758    async fn handle_open_buffer_by_path(
7759        this: Model<Self>,
7760        envelope: TypedEnvelope<proto::OpenBufferByPath>,
7761        _: Arc<Client>,
7762        mut cx: AsyncAppContext,
7763    ) -> Result<proto::OpenBufferResponse> {
7764        let peer_id = envelope.original_sender_id()?;
7765        let worktree_id = WorktreeId::from_proto(envelope.payload.worktree_id);
7766        let open_buffer = this.update(&mut cx, |this, cx| {
7767            this.open_buffer(
7768                ProjectPath {
7769                    worktree_id,
7770                    path: PathBuf::from(envelope.payload.path).into(),
7771                },
7772                cx,
7773            )
7774        })?;
7775
7776        let buffer = open_buffer.await?;
7777        this.update(&mut cx, |this, cx| {
7778            Ok(proto::OpenBufferResponse {
7779                buffer_id: this.create_buffer_for_peer(&buffer, peer_id, cx),
7780            })
7781        })?
7782    }
7783
7784    fn serialize_project_transaction_for_peer(
7785        &mut self,
7786        project_transaction: ProjectTransaction,
7787        peer_id: proto::PeerId,
7788        cx: &mut AppContext,
7789    ) -> proto::ProjectTransaction {
7790        let mut serialized_transaction = proto::ProjectTransaction {
7791            buffer_ids: Default::default(),
7792            transactions: Default::default(),
7793        };
7794        for (buffer, transaction) in project_transaction.0 {
7795            serialized_transaction
7796                .buffer_ids
7797                .push(self.create_buffer_for_peer(&buffer, peer_id, cx));
7798            serialized_transaction
7799                .transactions
7800                .push(language::proto::serialize_transaction(&transaction));
7801        }
7802        serialized_transaction
7803    }
7804
7805    fn deserialize_project_transaction(
7806        &mut self,
7807        message: proto::ProjectTransaction,
7808        push_to_history: bool,
7809        cx: &mut ModelContext<Self>,
7810    ) -> Task<Result<ProjectTransaction>> {
7811        cx.spawn(move |this, mut cx| async move {
7812            let mut project_transaction = ProjectTransaction::default();
7813            for (buffer_id, transaction) in message.buffer_ids.into_iter().zip(message.transactions)
7814            {
7815                let buffer = this
7816                    .update(&mut cx, |this, cx| {
7817                        this.wait_for_remote_buffer(buffer_id, cx)
7818                    })?
7819                    .await?;
7820                let transaction = language::proto::deserialize_transaction(transaction)?;
7821                project_transaction.0.insert(buffer, transaction);
7822            }
7823
7824            for (buffer, transaction) in &project_transaction.0 {
7825                buffer
7826                    .update(&mut cx, |buffer, _| {
7827                        buffer.wait_for_edits(transaction.edit_ids.iter().copied())
7828                    })?
7829                    .await?;
7830
7831                if push_to_history {
7832                    buffer.update(&mut cx, |buffer, _| {
7833                        buffer.push_transaction(transaction.clone(), Instant::now());
7834                    })?;
7835                }
7836            }
7837
7838            Ok(project_transaction)
7839        })
7840    }
7841
7842    fn create_buffer_for_peer(
7843        &mut self,
7844        buffer: &Model<Buffer>,
7845        peer_id: proto::PeerId,
7846        cx: &mut AppContext,
7847    ) -> u64 {
7848        let buffer_id = buffer.read(cx).remote_id();
7849        if let Some(ProjectClientState::Local { updates_tx, .. }) = &self.client_state {
7850            updates_tx
7851                .unbounded_send(LocalProjectUpdate::CreateBufferForPeer { peer_id, buffer_id })
7852                .ok();
7853        }
7854        buffer_id
7855    }
7856
7857    fn wait_for_remote_buffer(
7858        &mut self,
7859        id: u64,
7860        cx: &mut ModelContext<Self>,
7861    ) -> Task<Result<Model<Buffer>>> {
7862        let mut opened_buffer_rx = self.opened_buffer.1.clone();
7863
7864        cx.spawn(move |this, mut cx| async move {
7865            let buffer = loop {
7866                let Some(this) = this.upgrade() else {
7867                    return Err(anyhow!("project dropped"));
7868                };
7869
7870                let buffer = this.update(&mut cx, |this, _cx| {
7871                    this.opened_buffers
7872                        .get(&id)
7873                        .and_then(|buffer| buffer.upgrade())
7874                })?;
7875
7876                if let Some(buffer) = buffer {
7877                    break buffer;
7878                } else if this.update(&mut cx, |this, _| this.is_read_only())? {
7879                    return Err(anyhow!("disconnected before buffer {} could be opened", id));
7880                }
7881
7882                this.update(&mut cx, |this, _| {
7883                    this.incomplete_remote_buffers.entry(id).or_default();
7884                })?;
7885                drop(this);
7886
7887                opened_buffer_rx
7888                    .next()
7889                    .await
7890                    .ok_or_else(|| anyhow!("project dropped while waiting for buffer"))?;
7891            };
7892
7893            Ok(buffer)
7894        })
7895    }
7896
7897    fn synchronize_remote_buffers(&mut self, cx: &mut ModelContext<Self>) -> Task<Result<()>> {
7898        let project_id = match self.client_state.as_ref() {
7899            Some(ProjectClientState::Remote {
7900                sharing_has_stopped,
7901                remote_id,
7902                ..
7903            }) => {
7904                if *sharing_has_stopped {
7905                    return Task::ready(Err(anyhow!(
7906                        "can't synchronize remote buffers on a readonly project"
7907                    )));
7908                } else {
7909                    *remote_id
7910                }
7911            }
7912            Some(ProjectClientState::Local { .. }) | None => {
7913                return Task::ready(Err(anyhow!(
7914                    "can't synchronize remote buffers on a local project"
7915                )))
7916            }
7917        };
7918
7919        let client = self.client.clone();
7920        cx.spawn(move |this, mut cx| async move {
7921            let (buffers, incomplete_buffer_ids) = this.update(&mut cx, |this, cx| {
7922                let buffers = this
7923                    .opened_buffers
7924                    .iter()
7925                    .filter_map(|(id, buffer)| {
7926                        let buffer = buffer.upgrade()?;
7927                        Some(proto::BufferVersion {
7928                            id: *id,
7929                            version: language::proto::serialize_version(&buffer.read(cx).version),
7930                        })
7931                    })
7932                    .collect();
7933                let incomplete_buffer_ids = this
7934                    .incomplete_remote_buffers
7935                    .keys()
7936                    .copied()
7937                    .collect::<Vec<_>>();
7938
7939                (buffers, incomplete_buffer_ids)
7940            })?;
7941            let response = client
7942                .request(proto::SynchronizeBuffers {
7943                    project_id,
7944                    buffers,
7945                })
7946                .await?;
7947
7948            let send_updates_for_buffers = this.update(&mut cx, |this, cx| {
7949                response
7950                    .buffers
7951                    .into_iter()
7952                    .map(|buffer| {
7953                        let client = client.clone();
7954                        let buffer_id = buffer.id;
7955                        let remote_version = language::proto::deserialize_version(&buffer.version);
7956                        if let Some(buffer) = this.buffer_for_id(buffer_id) {
7957                            let operations =
7958                                buffer.read(cx).serialize_ops(Some(remote_version), cx);
7959                            cx.background_executor().spawn(async move {
7960                                let operations = operations.await;
7961                                for chunk in split_operations(operations) {
7962                                    client
7963                                        .request(proto::UpdateBuffer {
7964                                            project_id,
7965                                            buffer_id,
7966                                            operations: chunk,
7967                                        })
7968                                        .await?;
7969                                }
7970                                anyhow::Ok(())
7971                            })
7972                        } else {
7973                            Task::ready(Ok(()))
7974                        }
7975                    })
7976                    .collect::<Vec<_>>()
7977            })?;
7978
7979            // Any incomplete buffers have open requests waiting. Request that the host sends
7980            // creates these buffers for us again to unblock any waiting futures.
7981            for id in incomplete_buffer_ids {
7982                cx.background_executor()
7983                    .spawn(client.request(proto::OpenBufferById { project_id, id }))
7984                    .detach();
7985            }
7986
7987            futures::future::join_all(send_updates_for_buffers)
7988                .await
7989                .into_iter()
7990                .collect()
7991        })
7992    }
7993
7994    pub fn worktree_metadata_protos(&self, cx: &AppContext) -> Vec<proto::WorktreeMetadata> {
7995        self.worktrees()
7996            .map(|worktree| {
7997                let worktree = worktree.read(cx);
7998                proto::WorktreeMetadata {
7999                    id: worktree.id().to_proto(),
8000                    root_name: worktree.root_name().into(),
8001                    visible: worktree.is_visible(),
8002                    abs_path: worktree.abs_path().to_string_lossy().into(),
8003                }
8004            })
8005            .collect()
8006    }
8007
8008    fn set_worktrees_from_proto(
8009        &mut self,
8010        worktrees: Vec<proto::WorktreeMetadata>,
8011        cx: &mut ModelContext<Project>,
8012    ) -> Result<()> {
8013        let replica_id = self.replica_id();
8014        let remote_id = self.remote_id().ok_or_else(|| anyhow!("invalid project"))?;
8015
8016        let mut old_worktrees_by_id = self
8017            .worktrees
8018            .drain(..)
8019            .filter_map(|worktree| {
8020                let worktree = worktree.upgrade()?;
8021                Some((worktree.read(cx).id(), worktree))
8022            })
8023            .collect::<HashMap<_, _>>();
8024
8025        for worktree in worktrees {
8026            if let Some(old_worktree) =
8027                old_worktrees_by_id.remove(&WorktreeId::from_proto(worktree.id))
8028            {
8029                self.worktrees.push(WorktreeHandle::Strong(old_worktree));
8030            } else {
8031                let worktree =
8032                    Worktree::remote(remote_id, replica_id, worktree, self.client.clone(), cx);
8033                let _ = self.add_worktree(&worktree, cx);
8034            }
8035        }
8036
8037        self.metadata_changed(cx);
8038        for id in old_worktrees_by_id.keys() {
8039            cx.emit(Event::WorktreeRemoved(*id));
8040        }
8041
8042        Ok(())
8043    }
8044
8045    fn set_collaborators_from_proto(
8046        &mut self,
8047        messages: Vec<proto::Collaborator>,
8048        cx: &mut ModelContext<Self>,
8049    ) -> Result<()> {
8050        let mut collaborators = HashMap::default();
8051        for message in messages {
8052            let collaborator = Collaborator::from_proto(message)?;
8053            collaborators.insert(collaborator.peer_id, collaborator);
8054        }
8055        for old_peer_id in self.collaborators.keys() {
8056            if !collaborators.contains_key(old_peer_id) {
8057                cx.emit(Event::CollaboratorLeft(*old_peer_id));
8058            }
8059        }
8060        self.collaborators = collaborators;
8061        Ok(())
8062    }
8063
8064    fn deserialize_symbol(
8065        &self,
8066        serialized_symbol: proto::Symbol,
8067    ) -> impl Future<Output = Result<Symbol>> {
8068        let languages = self.languages.clone();
8069        async move {
8070            let source_worktree_id = WorktreeId::from_proto(serialized_symbol.source_worktree_id);
8071            let worktree_id = WorktreeId::from_proto(serialized_symbol.worktree_id);
8072            let start = serialized_symbol
8073                .start
8074                .ok_or_else(|| anyhow!("invalid start"))?;
8075            let end = serialized_symbol
8076                .end
8077                .ok_or_else(|| anyhow!("invalid end"))?;
8078            let kind = unsafe { mem::transmute(serialized_symbol.kind) };
8079            let path = ProjectPath {
8080                worktree_id,
8081                path: PathBuf::from(serialized_symbol.path).into(),
8082            };
8083            let language = languages
8084                .language_for_file(&path.path, None)
8085                .await
8086                .log_err();
8087            Ok(Symbol {
8088                language_server_name: LanguageServerName(
8089                    serialized_symbol.language_server_name.into(),
8090                ),
8091                source_worktree_id,
8092                path,
8093                label: {
8094                    match language {
8095                        Some(language) => {
8096                            language
8097                                .label_for_symbol(&serialized_symbol.name, kind)
8098                                .await
8099                        }
8100                        None => None,
8101                    }
8102                    .unwrap_or_else(|| CodeLabel::plain(serialized_symbol.name.clone(), None))
8103                },
8104
8105                name: serialized_symbol.name,
8106                range: Unclipped(PointUtf16::new(start.row, start.column))
8107                    ..Unclipped(PointUtf16::new(end.row, end.column)),
8108                kind,
8109                signature: serialized_symbol
8110                    .signature
8111                    .try_into()
8112                    .map_err(|_| anyhow!("invalid signature"))?,
8113            })
8114        }
8115    }
8116
8117    async fn handle_buffer_saved(
8118        this: Model<Self>,
8119        envelope: TypedEnvelope<proto::BufferSaved>,
8120        _: Arc<Client>,
8121        mut cx: AsyncAppContext,
8122    ) -> Result<()> {
8123        let fingerprint = deserialize_fingerprint(&envelope.payload.fingerprint)?;
8124        let version = deserialize_version(&envelope.payload.version);
8125        let mtime = envelope
8126            .payload
8127            .mtime
8128            .ok_or_else(|| anyhow!("missing mtime"))?
8129            .into();
8130
8131        this.update(&mut cx, |this, cx| {
8132            let buffer = this
8133                .opened_buffers
8134                .get(&envelope.payload.buffer_id)
8135                .and_then(|buffer| buffer.upgrade())
8136                .or_else(|| {
8137                    this.incomplete_remote_buffers
8138                        .get(&envelope.payload.buffer_id)
8139                        .and_then(|b| b.clone())
8140                });
8141            if let Some(buffer) = buffer {
8142                buffer.update(cx, |buffer, cx| {
8143                    buffer.did_save(version, fingerprint, mtime, cx);
8144                });
8145            }
8146            Ok(())
8147        })?
8148    }
8149
8150    async fn handle_buffer_reloaded(
8151        this: Model<Self>,
8152        envelope: TypedEnvelope<proto::BufferReloaded>,
8153        _: Arc<Client>,
8154        mut cx: AsyncAppContext,
8155    ) -> Result<()> {
8156        let payload = envelope.payload;
8157        let version = deserialize_version(&payload.version);
8158        let fingerprint = deserialize_fingerprint(&payload.fingerprint)?;
8159        let line_ending = deserialize_line_ending(
8160            proto::LineEnding::from_i32(payload.line_ending)
8161                .ok_or_else(|| anyhow!("missing line ending"))?,
8162        );
8163        let mtime = payload
8164            .mtime
8165            .ok_or_else(|| anyhow!("missing mtime"))?
8166            .into();
8167        this.update(&mut cx, |this, cx| {
8168            let buffer = this
8169                .opened_buffers
8170                .get(&payload.buffer_id)
8171                .and_then(|buffer| buffer.upgrade())
8172                .or_else(|| {
8173                    this.incomplete_remote_buffers
8174                        .get(&payload.buffer_id)
8175                        .cloned()
8176                        .flatten()
8177                });
8178            if let Some(buffer) = buffer {
8179                buffer.update(cx, |buffer, cx| {
8180                    buffer.did_reload(version, fingerprint, line_ending, mtime, cx);
8181                });
8182            }
8183            Ok(())
8184        })?
8185    }
8186
8187    #[allow(clippy::type_complexity)]
8188    fn edits_from_lsp(
8189        &mut self,
8190        buffer: &Model<Buffer>,
8191        lsp_edits: impl 'static + Send + IntoIterator<Item = lsp::TextEdit>,
8192        server_id: LanguageServerId,
8193        version: Option<i32>,
8194        cx: &mut ModelContext<Self>,
8195    ) -> Task<Result<Vec<(Range<Anchor>, String)>>> {
8196        let snapshot = self.buffer_snapshot_for_lsp_version(buffer, server_id, version, cx);
8197        cx.background_executor().spawn(async move {
8198            let snapshot = snapshot?;
8199            let mut lsp_edits = lsp_edits
8200                .into_iter()
8201                .map(|edit| (range_from_lsp(edit.range), edit.new_text))
8202                .collect::<Vec<_>>();
8203            lsp_edits.sort_by_key(|(range, _)| range.start);
8204
8205            let mut lsp_edits = lsp_edits.into_iter().peekable();
8206            let mut edits = Vec::new();
8207            while let Some((range, mut new_text)) = lsp_edits.next() {
8208                // Clip invalid ranges provided by the language server.
8209                let mut range = snapshot.clip_point_utf16(range.start, Bias::Left)
8210                    ..snapshot.clip_point_utf16(range.end, Bias::Left);
8211
8212                // Combine any LSP edits that are adjacent.
8213                //
8214                // Also, combine LSP edits that are separated from each other by only
8215                // a newline. This is important because for some code actions,
8216                // Rust-analyzer rewrites the entire buffer via a series of edits that
8217                // are separated by unchanged newline characters.
8218                //
8219                // In order for the diffing logic below to work properly, any edits that
8220                // cancel each other out must be combined into one.
8221                while let Some((next_range, next_text)) = lsp_edits.peek() {
8222                    if next_range.start.0 > range.end {
8223                        if next_range.start.0.row > range.end.row + 1
8224                            || next_range.start.0.column > 0
8225                            || snapshot.clip_point_utf16(
8226                                Unclipped(PointUtf16::new(range.end.row, u32::MAX)),
8227                                Bias::Left,
8228                            ) > range.end
8229                        {
8230                            break;
8231                        }
8232                        new_text.push('\n');
8233                    }
8234                    range.end = snapshot.clip_point_utf16(next_range.end, Bias::Left);
8235                    new_text.push_str(next_text);
8236                    lsp_edits.next();
8237                }
8238
8239                // For multiline edits, perform a diff of the old and new text so that
8240                // we can identify the changes more precisely, preserving the locations
8241                // of any anchors positioned in the unchanged regions.
8242                if range.end.row > range.start.row {
8243                    let mut offset = range.start.to_offset(&snapshot);
8244                    let old_text = snapshot.text_for_range(range).collect::<String>();
8245
8246                    let diff = TextDiff::from_lines(old_text.as_str(), &new_text);
8247                    let mut moved_since_edit = true;
8248                    for change in diff.iter_all_changes() {
8249                        let tag = change.tag();
8250                        let value = change.value();
8251                        match tag {
8252                            ChangeTag::Equal => {
8253                                offset += value.len();
8254                                moved_since_edit = true;
8255                            }
8256                            ChangeTag::Delete => {
8257                                let start = snapshot.anchor_after(offset);
8258                                let end = snapshot.anchor_before(offset + value.len());
8259                                if moved_since_edit {
8260                                    edits.push((start..end, String::new()));
8261                                } else {
8262                                    edits.last_mut().unwrap().0.end = end;
8263                                }
8264                                offset += value.len();
8265                                moved_since_edit = false;
8266                            }
8267                            ChangeTag::Insert => {
8268                                if moved_since_edit {
8269                                    let anchor = snapshot.anchor_after(offset);
8270                                    edits.push((anchor..anchor, value.to_string()));
8271                                } else {
8272                                    edits.last_mut().unwrap().1.push_str(value);
8273                                }
8274                                moved_since_edit = false;
8275                            }
8276                        }
8277                    }
8278                } else if range.end == range.start {
8279                    let anchor = snapshot.anchor_after(range.start);
8280                    edits.push((anchor..anchor, new_text));
8281                } else {
8282                    let edit_start = snapshot.anchor_after(range.start);
8283                    let edit_end = snapshot.anchor_before(range.end);
8284                    edits.push((edit_start..edit_end, new_text));
8285                }
8286            }
8287
8288            Ok(edits)
8289        })
8290    }
8291
8292    fn buffer_snapshot_for_lsp_version(
8293        &mut self,
8294        buffer: &Model<Buffer>,
8295        server_id: LanguageServerId,
8296        version: Option<i32>,
8297        cx: &AppContext,
8298    ) -> Result<TextBufferSnapshot> {
8299        const OLD_VERSIONS_TO_RETAIN: i32 = 10;
8300
8301        if let Some(version) = version {
8302            let buffer_id = buffer.read(cx).remote_id();
8303            let snapshots = self
8304                .buffer_snapshots
8305                .get_mut(&buffer_id)
8306                .and_then(|m| m.get_mut(&server_id))
8307                .ok_or_else(|| {
8308                    anyhow!("no snapshots found for buffer {buffer_id} and server {server_id}")
8309                })?;
8310
8311            let found_snapshot = snapshots
8312                .binary_search_by_key(&version, |e| e.version)
8313                .map(|ix| snapshots[ix].snapshot.clone())
8314                .map_err(|_| {
8315                    anyhow!("snapshot not found for buffer {buffer_id} server {server_id} at version {version}")
8316                })?;
8317
8318            snapshots.retain(|snapshot| snapshot.version + OLD_VERSIONS_TO_RETAIN >= version);
8319            Ok(found_snapshot)
8320        } else {
8321            Ok((buffer.read(cx)).text_snapshot())
8322        }
8323    }
8324
8325    pub fn language_servers(
8326        &self,
8327    ) -> impl '_ + Iterator<Item = (LanguageServerId, LanguageServerName, WorktreeId)> {
8328        self.language_server_ids
8329            .iter()
8330            .map(|((worktree_id, server_name), server_id)| {
8331                (*server_id, server_name.clone(), *worktree_id)
8332            })
8333    }
8334
8335    pub fn supplementary_language_servers(
8336        &self,
8337    ) -> impl '_
8338           + Iterator<
8339        Item = (
8340            &LanguageServerId,
8341            &(LanguageServerName, Arc<LanguageServer>),
8342        ),
8343    > {
8344        self.supplementary_language_servers.iter()
8345    }
8346
8347    pub fn language_server_for_id(&self, id: LanguageServerId) -> Option<Arc<LanguageServer>> {
8348        if let Some(LanguageServerState::Running { server, .. }) = self.language_servers.get(&id) {
8349            Some(server.clone())
8350        } else if let Some((_, server)) = self.supplementary_language_servers.get(&id) {
8351            Some(Arc::clone(server))
8352        } else {
8353            None
8354        }
8355    }
8356
8357    pub fn language_servers_for_buffer(
8358        &self,
8359        buffer: &Buffer,
8360        cx: &AppContext,
8361    ) -> impl Iterator<Item = (&Arc<CachedLspAdapter>, &Arc<LanguageServer>)> {
8362        self.language_server_ids_for_buffer(buffer, cx)
8363            .into_iter()
8364            .filter_map(|server_id| match self.language_servers.get(&server_id)? {
8365                LanguageServerState::Running {
8366                    adapter, server, ..
8367                } => Some((adapter, server)),
8368                _ => None,
8369            })
8370    }
8371
8372    fn primary_language_server_for_buffer(
8373        &self,
8374        buffer: &Buffer,
8375        cx: &AppContext,
8376    ) -> Option<(&Arc<CachedLspAdapter>, &Arc<LanguageServer>)> {
8377        self.language_servers_for_buffer(buffer, cx).next()
8378    }
8379
8380    pub fn language_server_for_buffer(
8381        &self,
8382        buffer: &Buffer,
8383        server_id: LanguageServerId,
8384        cx: &AppContext,
8385    ) -> Option<(&Arc<CachedLspAdapter>, &Arc<LanguageServer>)> {
8386        self.language_servers_for_buffer(buffer, cx)
8387            .find(|(_, s)| s.server_id() == server_id)
8388    }
8389
8390    fn language_server_ids_for_buffer(
8391        &self,
8392        buffer: &Buffer,
8393        cx: &AppContext,
8394    ) -> Vec<LanguageServerId> {
8395        if let Some((file, language)) = File::from_dyn(buffer.file()).zip(buffer.language()) {
8396            let worktree_id = file.worktree_id(cx);
8397            language
8398                .lsp_adapters()
8399                .iter()
8400                .flat_map(|adapter| {
8401                    let key = (worktree_id, adapter.name.clone());
8402                    self.language_server_ids.get(&key).copied()
8403                })
8404                .collect()
8405        } else {
8406            Vec::new()
8407        }
8408    }
8409
8410    fn prettier_instance_for_buffer(
8411        &mut self,
8412        buffer: &Model<Buffer>,
8413        cx: &mut ModelContext<Self>,
8414    ) -> Task<Option<Shared<Task<Result<Arc<Prettier>, Arc<anyhow::Error>>>>>> {
8415        let buffer = buffer.read(cx);
8416        let buffer_file = buffer.file();
8417        let Some(buffer_language) = buffer.language() else {
8418            return Task::ready(None);
8419        };
8420        if buffer_language.prettier_parser_name().is_none() {
8421            return Task::ready(None);
8422        }
8423
8424        let buffer_file = File::from_dyn(buffer_file);
8425        let buffer_path = buffer_file.map(|file| Arc::clone(file.path()));
8426        let worktree_path = buffer_file
8427            .as_ref()
8428            .and_then(|file| Some(file.worktree.read(cx).abs_path()));
8429        let worktree_id = buffer_file.map(|file| file.worktree_id(cx));
8430        if self.is_local() || worktree_id.is_none() || worktree_path.is_none() {
8431            let Some(node) = self.node.as_ref().map(Arc::clone) else {
8432                return Task::ready(None);
8433            };
8434            let fs = self.fs.clone();
8435            cx.spawn(move |this, mut cx| async move {
8436                let prettier_dir = match cx
8437                    .background_executor()
8438                    .spawn(Prettier::locate(
8439                        worktree_path.zip(buffer_path).map(
8440                            |(worktree_root_path, starting_path)| LocateStart {
8441                                worktree_root_path,
8442                                starting_path,
8443                            },
8444                        ),
8445                        fs,
8446                    ))
8447                    .await
8448                {
8449                    Ok(path) => path,
8450                    Err(e) => {
8451                        return Some(
8452                            Task::ready(Err(Arc::new(e.context(
8453                                "determining prettier path for worktree {worktree_path:?}",
8454                            ))))
8455                            .shared(),
8456                        );
8457                    }
8458                };
8459
8460                if let Some(existing_prettier) = this
8461                    .update(&mut cx, |project, _| {
8462                        project
8463                            .prettier_instances
8464                            .get(&(worktree_id, prettier_dir.clone()))
8465                            .cloned()
8466                    })
8467                    .ok()
8468                    .flatten()
8469                {
8470                    return Some(existing_prettier);
8471                }
8472
8473                log::info!("Found prettier in {prettier_dir:?}, starting.");
8474                let task_prettier_dir = prettier_dir.clone();
8475                let new_prettier_task = cx
8476                    .spawn({
8477                        let this = this.clone();
8478                        move |mut cx| async move {
8479                            let new_server_id = this.update(&mut cx, |this, _| {
8480                                this.languages.next_language_server_id()
8481                            })?;
8482                            let prettier = Prettier::start(
8483                                worktree_id.map(|id| id.to_usize()),
8484                                new_server_id,
8485                                task_prettier_dir,
8486                                node,
8487                                cx.clone(),
8488                            )
8489                            .await
8490                            .context("prettier start")
8491                            .map_err(Arc::new)?;
8492                            log::info!("Started prettier in {:?}", prettier.prettier_dir());
8493
8494                            if let Some(prettier_server) = prettier.server() {
8495                                this.update(&mut cx, |project, cx| {
8496                                    let name = if prettier.is_default() {
8497                                        LanguageServerName(Arc::from("prettier (default)"))
8498                                    } else {
8499                                        let prettier_dir = prettier.prettier_dir();
8500                                        let worktree_path = prettier
8501                                            .worktree_id()
8502                                            .map(WorktreeId::from_usize)
8503                                            .and_then(|id| project.worktree_for_id(id, cx))
8504                                            .map(|worktree| worktree.read(cx).abs_path());
8505                                        match worktree_path {
8506                                            Some(worktree_path) => {
8507                                                if worktree_path.as_ref() == prettier_dir {
8508                                                    LanguageServerName(Arc::from(format!(
8509                                                        "prettier ({})",
8510                                                        prettier_dir
8511                                                            .file_name()
8512                                                            .and_then(|name| name.to_str())
8513                                                            .unwrap_or_default()
8514                                                    )))
8515                                                } else {
8516                                                    let dir_to_display = match prettier_dir
8517                                                        .strip_prefix(&worktree_path)
8518                                                        .ok()
8519                                                    {
8520                                                        Some(relative_path) => relative_path,
8521                                                        None => prettier_dir,
8522                                                    };
8523                                                    LanguageServerName(Arc::from(format!(
8524                                                        "prettier ({})",
8525                                                        dir_to_display.display(),
8526                                                    )))
8527                                                }
8528                                            }
8529                                            None => LanguageServerName(Arc::from(format!(
8530                                                "prettier ({})",
8531                                                prettier_dir.display(),
8532                                            ))),
8533                                        }
8534                                    };
8535
8536                                    project
8537                                        .supplementary_language_servers
8538                                        .insert(new_server_id, (name, Arc::clone(prettier_server)));
8539                                    cx.emit(Event::LanguageServerAdded(new_server_id));
8540                                })?;
8541                            }
8542                            Ok(Arc::new(prettier)).map_err(Arc::new)
8543                        }
8544                    })
8545                    .shared();
8546                this.update(&mut cx, |project, _| {
8547                    project
8548                        .prettier_instances
8549                        .insert((worktree_id, prettier_dir), new_prettier_task.clone());
8550                })
8551                .ok();
8552                Some(new_prettier_task)
8553            })
8554        } else if self.remote_id().is_some() {
8555            return Task::ready(None);
8556        } else {
8557            Task::ready(Some(
8558                Task::ready(Err(Arc::new(anyhow!("project does not have a remote id")))).shared(),
8559            ))
8560        }
8561    }
8562
8563    #[cfg(any(test, feature = "test-support"))]
8564    fn install_default_formatters(
8565        &mut self,
8566        _: Option<WorktreeId>,
8567        _: &Language,
8568        _: &LanguageSettings,
8569        _: &mut ModelContext<Self>,
8570    ) -> Task<anyhow::Result<()>> {
8571        Task::ready(Ok(()))
8572    }
8573
8574    #[cfg(not(any(test, feature = "test-support")))]
8575    fn install_default_formatters(
8576        &mut self,
8577        worktree: Option<WorktreeId>,
8578        new_language: &Language,
8579        language_settings: &LanguageSettings,
8580        cx: &mut ModelContext<Self>,
8581    ) -> Task<anyhow::Result<()>> {
8582        match &language_settings.formatter {
8583            Formatter::Prettier { .. } | Formatter::Auto => {}
8584            Formatter::LanguageServer | Formatter::External { .. } => return Task::ready(Ok(())),
8585        };
8586        let Some(node) = self.node.as_ref().cloned() else {
8587            return Task::ready(Ok(()));
8588        };
8589
8590        let mut prettier_plugins = None;
8591        if new_language.prettier_parser_name().is_some() {
8592            prettier_plugins
8593                .get_or_insert_with(|| HashSet::default())
8594                .extend(
8595                    new_language
8596                        .lsp_adapters()
8597                        .iter()
8598                        .flat_map(|adapter| adapter.prettier_plugins()),
8599                )
8600        }
8601        let Some(prettier_plugins) = prettier_plugins else {
8602            return Task::ready(Ok(()));
8603        };
8604
8605        let mut plugins_to_install = prettier_plugins;
8606        let (mut install_success_tx, mut install_success_rx) =
8607            futures::channel::mpsc::channel::<HashSet<&'static str>>(1);
8608        let new_installation_process = cx
8609            .spawn(|this, mut cx| async move {
8610                if let Some(installed_plugins) = install_success_rx.next().await {
8611                    this.update(&mut cx, |this, _| {
8612                        let default_prettier =
8613                            this.default_prettier
8614                                .get_or_insert_with(|| DefaultPrettier {
8615                                    installation_process: None,
8616                                    installed_plugins: HashSet::default(),
8617                                });
8618                        if !installed_plugins.is_empty() {
8619                            log::info!("Installed new prettier plugins: {installed_plugins:?}");
8620                            default_prettier.installed_plugins.extend(installed_plugins);
8621                        }
8622                    })
8623                    .ok();
8624                }
8625            })
8626            .shared();
8627        let previous_installation_process =
8628            if let Some(default_prettier) = &mut self.default_prettier {
8629                plugins_to_install
8630                    .retain(|plugin| !default_prettier.installed_plugins.contains(plugin));
8631                if plugins_to_install.is_empty() {
8632                    return Task::ready(Ok(()));
8633                }
8634                std::mem::replace(
8635                    &mut default_prettier.installation_process,
8636                    Some(new_installation_process.clone()),
8637                )
8638            } else {
8639                None
8640            };
8641
8642        let default_prettier_dir = util::paths::DEFAULT_PRETTIER_DIR.as_path();
8643        let already_running_prettier = self
8644            .prettier_instances
8645            .get(&(worktree, default_prettier_dir.to_path_buf()))
8646            .cloned();
8647        let fs = Arc::clone(&self.fs);
8648        cx.spawn(move |this, mut cx| async move {
8649            if let Some(previous_installation_process) = previous_installation_process {
8650                previous_installation_process.await;
8651            }
8652            let mut everything_was_installed = false;
8653            this.update(&mut cx, |this, _| {
8654                match &mut this.default_prettier {
8655                    Some(default_prettier) => {
8656                        plugins_to_install
8657                            .retain(|plugin| !default_prettier.installed_plugins.contains(plugin));
8658                        everything_was_installed = plugins_to_install.is_empty();
8659                    },
8660                    None => this.default_prettier = Some(DefaultPrettier { installation_process: Some(new_installation_process), installed_plugins: HashSet::default() }),
8661                }
8662            })?;
8663            if everything_was_installed {
8664                return Ok(());
8665            }
8666
8667            cx.spawn(move |_| async move {
8668                let prettier_wrapper_path = default_prettier_dir.join(prettier::PRETTIER_SERVER_FILE);
8669                // method creates parent directory if it doesn't exist
8670                fs.save(&prettier_wrapper_path, &text::Rope::from(prettier::PRETTIER_SERVER_JS), text::LineEnding::Unix).await
8671                .with_context(|| format!("writing {} file at {prettier_wrapper_path:?}", prettier::PRETTIER_SERVER_FILE))?;
8672
8673                let packages_to_versions = future::try_join_all(
8674                    plugins_to_install
8675                        .iter()
8676                        .chain(Some(&"prettier"))
8677                        .map(|package_name| async {
8678                            let returned_package_name = package_name.to_string();
8679                            let latest_version = node.npm_package_latest_version(package_name)
8680                                .await
8681                                .with_context(|| {
8682                                    format!("fetching latest npm version for package {returned_package_name}")
8683                                })?;
8684                            anyhow::Ok((returned_package_name, latest_version))
8685                        }),
8686                )
8687                .await
8688                .context("fetching latest npm versions")?;
8689
8690                log::info!("Fetching default prettier and plugins: {packages_to_versions:?}");
8691                let borrowed_packages = packages_to_versions.iter().map(|(package, version)| {
8692                    (package.as_str(), version.as_str())
8693                }).collect::<Vec<_>>();
8694                node.npm_install_packages(default_prettier_dir, &borrowed_packages).await.context("fetching formatter packages")?;
8695                let installed_packages = !plugins_to_install.is_empty();
8696                install_success_tx.try_send(plugins_to_install).ok();
8697
8698                if !installed_packages {
8699                    if let Some(prettier) = already_running_prettier {
8700                        prettier.await.map_err(|e| anyhow::anyhow!("Default prettier startup await failure: {e:#}"))?.clear_cache().await.context("clearing default prettier cache after plugins install")?;
8701                    }
8702                }
8703
8704                anyhow::Ok(())
8705            }).await
8706        })
8707    }
8708}
8709
8710fn subscribe_for_copilot_events(
8711    copilot: &Model<Copilot>,
8712    cx: &mut ModelContext<'_, Project>,
8713) -> gpui::Subscription {
8714    cx.subscribe(
8715        copilot,
8716        |project, copilot, copilot_event, cx| match copilot_event {
8717            copilot::Event::CopilotLanguageServerStarted => {
8718                match copilot.read(cx).language_server() {
8719                    Some((name, copilot_server)) => {
8720                        // Another event wants to re-add the server that was already added and subscribed to, avoid doing it again.
8721                        if !copilot_server.has_notification_handler::<copilot::request::LogMessage>() {
8722                            let new_server_id = copilot_server.server_id();
8723                            let weak_project = cx.weak_model();
8724                            let copilot_log_subscription = copilot_server
8725                                .on_notification::<copilot::request::LogMessage, _>(
8726                                    move |params, mut cx| {
8727                                        weak_project.update(&mut cx, |_, cx| {
8728                                            cx.emit(Event::LanguageServerLog(
8729                                                new_server_id,
8730                                                params.message,
8731                                            ));
8732                                        }).ok();
8733                                    },
8734                                );
8735                            project.supplementary_language_servers.insert(new_server_id, (name.clone(), Arc::clone(copilot_server)));
8736                            project.copilot_log_subscription = Some(copilot_log_subscription);
8737                            cx.emit(Event::LanguageServerAdded(new_server_id));
8738                        }
8739                    }
8740                    None => debug_panic!("Received Copilot language server started event, but no language server is running"),
8741                }
8742            }
8743        },
8744    )
8745}
8746
8747fn glob_literal_prefix<'a>(glob: &'a str) -> &'a str {
8748    let mut literal_end = 0;
8749    for (i, part) in glob.split(path::MAIN_SEPARATOR).enumerate() {
8750        if part.contains(&['*', '?', '{', '}']) {
8751            break;
8752        } else {
8753            if i > 0 {
8754                // Acount for separator prior to this part
8755                literal_end += path::MAIN_SEPARATOR.len_utf8();
8756            }
8757            literal_end += part.len();
8758        }
8759    }
8760    &glob[..literal_end]
8761}
8762
8763impl WorktreeHandle {
8764    pub fn upgrade(&self) -> Option<Model<Worktree>> {
8765        match self {
8766            WorktreeHandle::Strong(handle) => Some(handle.clone()),
8767            WorktreeHandle::Weak(handle) => handle.upgrade(),
8768        }
8769    }
8770
8771    pub fn handle_id(&self) -> usize {
8772        match self {
8773            WorktreeHandle::Strong(handle) => handle.entity_id().as_u64() as usize,
8774            WorktreeHandle::Weak(handle) => handle.entity_id().as_u64() as usize,
8775        }
8776    }
8777}
8778
8779impl OpenBuffer {
8780    pub fn upgrade(&self) -> Option<Model<Buffer>> {
8781        match self {
8782            OpenBuffer::Strong(handle) => Some(handle.clone()),
8783            OpenBuffer::Weak(handle) => handle.upgrade(),
8784            OpenBuffer::Operations(_) => None,
8785        }
8786    }
8787}
8788
8789pub struct PathMatchCandidateSet {
8790    pub snapshot: Snapshot,
8791    pub include_ignored: bool,
8792    pub include_root_name: bool,
8793}
8794
8795impl<'a> fuzzy::PathMatchCandidateSet<'a> for PathMatchCandidateSet {
8796    type Candidates = PathMatchCandidateSetIter<'a>;
8797
8798    fn id(&self) -> usize {
8799        self.snapshot.id().to_usize()
8800    }
8801
8802    fn len(&self) -> usize {
8803        if self.include_ignored {
8804            self.snapshot.file_count()
8805        } else {
8806            self.snapshot.visible_file_count()
8807        }
8808    }
8809
8810    fn prefix(&self) -> Arc<str> {
8811        if self.snapshot.root_entry().map_or(false, |e| e.is_file()) {
8812            self.snapshot.root_name().into()
8813        } else if self.include_root_name {
8814            format!("{}/", self.snapshot.root_name()).into()
8815        } else {
8816            "".into()
8817        }
8818    }
8819
8820    fn candidates(&'a self, start: usize) -> Self::Candidates {
8821        PathMatchCandidateSetIter {
8822            traversal: self.snapshot.files(self.include_ignored, start),
8823        }
8824    }
8825}
8826
8827pub struct PathMatchCandidateSetIter<'a> {
8828    traversal: Traversal<'a>,
8829}
8830
8831impl<'a> Iterator for PathMatchCandidateSetIter<'a> {
8832    type Item = fuzzy::PathMatchCandidate<'a>;
8833
8834    fn next(&mut self) -> Option<Self::Item> {
8835        self.traversal.next().map(|entry| {
8836            if let EntryKind::File(char_bag) = entry.kind {
8837                fuzzy::PathMatchCandidate {
8838                    path: &entry.path,
8839                    char_bag,
8840                }
8841            } else {
8842                unreachable!()
8843            }
8844        })
8845    }
8846}
8847
8848impl EventEmitter for Project {
8849    type Event = Event;
8850}
8851
8852impl<P: AsRef<Path>> From<(WorktreeId, P)> for ProjectPath {
8853    fn from((worktree_id, path): (WorktreeId, P)) -> Self {
8854        Self {
8855            worktree_id,
8856            path: path.as_ref().into(),
8857        }
8858    }
8859}
8860
8861impl ProjectLspAdapterDelegate {
8862    fn new(project: &Project, cx: &ModelContext<Project>) -> Arc<Self> {
8863        Arc::new(Self {
8864            project: cx.handle(),
8865            http_client: project.client.http_client(),
8866        })
8867    }
8868}
8869
8870impl LspAdapterDelegate for ProjectLspAdapterDelegate {
8871    fn show_notification(&self, message: &str, cx: &mut AppContext) {
8872        self.project
8873            .update(cx, |_, cx| cx.emit(Event::Notification(message.to_owned())));
8874    }
8875
8876    fn http_client(&self) -> Arc<dyn HttpClient> {
8877        self.http_client.clone()
8878    }
8879}
8880
8881fn serialize_symbol(symbol: &Symbol) -> proto::Symbol {
8882    proto::Symbol {
8883        language_server_name: symbol.language_server_name.0.to_string(),
8884        source_worktree_id: symbol.source_worktree_id.to_proto(),
8885        worktree_id: symbol.path.worktree_id.to_proto(),
8886        path: symbol.path.path.to_string_lossy().to_string(),
8887        name: symbol.name.clone(),
8888        kind: unsafe { mem::transmute(symbol.kind) },
8889        start: Some(proto::PointUtf16 {
8890            row: symbol.range.start.0.row,
8891            column: symbol.range.start.0.column,
8892        }),
8893        end: Some(proto::PointUtf16 {
8894            row: symbol.range.end.0.row,
8895            column: symbol.range.end.0.column,
8896        }),
8897        signature: symbol.signature.to_vec(),
8898    }
8899}
8900
8901fn relativize_path(base: &Path, path: &Path) -> PathBuf {
8902    let mut path_components = path.components();
8903    let mut base_components = base.components();
8904    let mut components: Vec<Component> = Vec::new();
8905    loop {
8906        match (path_components.next(), base_components.next()) {
8907            (None, None) => break,
8908            (Some(a), None) => {
8909                components.push(a);
8910                components.extend(path_components.by_ref());
8911                break;
8912            }
8913            (None, _) => components.push(Component::ParentDir),
8914            (Some(a), Some(b)) if components.is_empty() && a == b => (),
8915            (Some(a), Some(b)) if b == Component::CurDir => components.push(a),
8916            (Some(a), Some(_)) => {
8917                components.push(Component::ParentDir);
8918                for _ in base_components {
8919                    components.push(Component::ParentDir);
8920                }
8921                components.push(a);
8922                components.extend(path_components.by_ref());
8923                break;
8924            }
8925        }
8926    }
8927    components.iter().map(|c| c.as_os_str()).collect()
8928}
8929
8930impl Item for Buffer {
8931    fn entry_id(&self, cx: &AppContext) -> Option<ProjectEntryId> {
8932        File::from_dyn(self.file()).and_then(|file| file.project_entry_id(cx))
8933    }
8934
8935    fn project_path(&self, cx: &AppContext) -> Option<ProjectPath> {
8936        File::from_dyn(self.file()).map(|file| ProjectPath {
8937            worktree_id: file.worktree_id(cx),
8938            path: file.path().clone(),
8939        })
8940    }
8941}
8942
8943async fn wait_for_loading_buffer(
8944    mut receiver: postage::watch::Receiver<Option<Result<Model<Buffer>, Arc<anyhow::Error>>>>,
8945) -> Result<Model<Buffer>, Arc<anyhow::Error>> {
8946    loop {
8947        if let Some(result) = receiver.borrow().as_ref() {
8948            match result {
8949                Ok(buffer) => return Ok(buffer.to_owned()),
8950                Err(e) => return Err(e.to_owned()),
8951            }
8952        }
8953        receiver.next().await;
8954    }
8955}
8956
8957fn include_text(server: &lsp::LanguageServer) -> bool {
8958    server
8959        .capabilities()
8960        .text_document_sync
8961        .as_ref()
8962        .and_then(|sync| match sync {
8963            lsp::TextDocumentSyncCapability::Kind(_) => None,
8964            lsp::TextDocumentSyncCapability::Options(options) => options.save.as_ref(),
8965        })
8966        .and_then(|save_options| match save_options {
8967            lsp::TextDocumentSyncSaveOptions::Supported(_) => None,
8968            lsp::TextDocumentSyncSaveOptions::SaveOptions(options) => options.include_text,
8969        })
8970        .unwrap_or(false)
8971}