worktree.rs

   1mod ignore;
   2mod worktree_settings;
   3#[cfg(test)]
   4mod worktree_tests;
   5
   6use ::ignore::gitignore::{Gitignore, GitignoreBuilder};
   7use anyhow::{anyhow, Context as _, Result};
   8use clock::ReplicaId;
   9use collections::{HashMap, HashSet, VecDeque};
  10use fs::{copy_recursive, Fs, MTime, PathEvent, RemoveOptions, Watcher};
  11use futures::{
  12    channel::{
  13        mpsc::{self, UnboundedSender},
  14        oneshot,
  15    },
  16    select_biased,
  17    task::Poll,
  18    FutureExt as _, Stream, StreamExt,
  19};
  20use fuzzy::CharBag;
  21use git::{
  22    repository::{GitRepository, RepoPath},
  23    status::{
  24        FileStatus, GitSummary, StatusCode, TrackedStatus, UnmergedStatus, UnmergedStatusCode,
  25    },
  26    GitHostingProviderRegistry, COOKIES, DOT_GIT, FSMONITOR_DAEMON, GITIGNORE,
  27};
  28use gpui::{
  29    App, AppContext as _, AsyncApp, BackgroundExecutor, Context, Entity, EventEmitter, Task,
  30};
  31use ignore::IgnoreStack;
  32use language::DiskState;
  33
  34use parking_lot::Mutex;
  35use paths::local_settings_folder_relative_path;
  36use postage::{
  37    barrier,
  38    prelude::{Sink as _, Stream as _},
  39    watch,
  40};
  41use rpc::{
  42    proto::{self, split_worktree_update},
  43    AnyProtoClient,
  44};
  45pub use settings::WorktreeId;
  46use settings::{Settings, SettingsLocation, SettingsStore};
  47use smallvec::{smallvec, SmallVec};
  48use smol::channel::{self, Sender};
  49use std::{
  50    any::Any,
  51    cmp::Ordering,
  52    collections::hash_map,
  53    convert::TryFrom,
  54    ffi::OsStr,
  55    fmt,
  56    future::Future,
  57    mem::{self},
  58    ops::{Deref, DerefMut},
  59    path::{Path, PathBuf},
  60    pin::Pin,
  61    sync::{
  62        atomic::{AtomicUsize, Ordering::SeqCst},
  63        Arc,
  64    },
  65    time::{Duration, Instant},
  66};
  67use sum_tree::{
  68    Bias, Cursor, Edit, KeyedItem, SeekTarget, SumTree, Summary, TreeMap, TreeSet, Unit,
  69};
  70use text::{LineEnding, Rope};
  71use util::{
  72    paths::{home_dir, PathMatcher, SanitizedPath},
  73    ResultExt,
  74};
  75pub use worktree_settings::WorktreeSettings;
  76
  77#[cfg(feature = "test-support")]
  78pub const FS_WATCH_LATENCY: Duration = Duration::from_millis(100);
  79#[cfg(not(feature = "test-support"))]
  80pub const FS_WATCH_LATENCY: Duration = Duration::from_millis(100);
  81
  82/// A set of local or remote files that are being opened as part of a project.
  83/// Responsible for tracking related FS (for local)/collab (for remote) events and corresponding updates.
  84/// Stores git repositories data and the diagnostics for the file(s).
  85///
  86/// Has an absolute path, and may be set to be visible in Zed UI or not.
  87/// May correspond to a directory or a single file.
  88/// Possible examples:
  89/// * a drag and dropped file — may be added as an invisible, "ephemeral" entry to the current worktree
  90/// * a directory opened in Zed — may be added as a visible entry to the current worktree
  91///
  92/// Uses [`Entry`] to track the state of each file/directory, can look up absolute paths for entries.
  93pub enum Worktree {
  94    Local(LocalWorktree),
  95    Remote(RemoteWorktree),
  96}
  97
  98/// An entry, created in the worktree.
  99#[derive(Debug)]
 100pub enum CreatedEntry {
 101    /// Got created and indexed by the worktree, receiving a corresponding entry.
 102    Included(Entry),
 103    /// Got created, but not indexed due to falling under exclusion filters.
 104    Excluded { abs_path: PathBuf },
 105}
 106
 107pub struct LoadedFile {
 108    pub file: Arc<File>,
 109    pub text: String,
 110}
 111
 112pub struct LoadedBinaryFile {
 113    pub file: Arc<File>,
 114    pub content: Vec<u8>,
 115}
 116
 117pub struct LocalWorktree {
 118    snapshot: LocalSnapshot,
 119    scan_requests_tx: channel::Sender<ScanRequest>,
 120    path_prefixes_to_scan_tx: channel::Sender<PathPrefixScanRequest>,
 121    is_scanning: (watch::Sender<bool>, watch::Receiver<bool>),
 122    _background_scanner_tasks: Vec<Task<()>>,
 123    update_observer: Option<UpdateObservationState>,
 124    fs: Arc<dyn Fs>,
 125    fs_case_sensitive: bool,
 126    visible: bool,
 127    next_entry_id: Arc<AtomicUsize>,
 128    settings: WorktreeSettings,
 129    share_private_files: bool,
 130}
 131
 132pub struct PathPrefixScanRequest {
 133    path: Arc<Path>,
 134    done: SmallVec<[barrier::Sender; 1]>,
 135}
 136
 137struct ScanRequest {
 138    relative_paths: Vec<Arc<Path>>,
 139    done: SmallVec<[barrier::Sender; 1]>,
 140}
 141
 142pub struct RemoteWorktree {
 143    snapshot: Snapshot,
 144    background_snapshot: Arc<Mutex<(Snapshot, Vec<proto::UpdateWorktree>)>>,
 145    project_id: u64,
 146    client: AnyProtoClient,
 147    file_scan_inclusions: PathMatcher,
 148    updates_tx: Option<UnboundedSender<proto::UpdateWorktree>>,
 149    update_observer: Option<mpsc::UnboundedSender<proto::UpdateWorktree>>,
 150    snapshot_subscriptions: VecDeque<(usize, oneshot::Sender<()>)>,
 151    replica_id: ReplicaId,
 152    visible: bool,
 153    disconnected: bool,
 154}
 155
 156#[derive(Clone)]
 157pub struct Snapshot {
 158    id: WorktreeId,
 159    abs_path: SanitizedPath,
 160    root_name: String,
 161    root_char_bag: CharBag,
 162    entries_by_path: SumTree<Entry>,
 163    entries_by_id: SumTree<PathEntry>,
 164    always_included_entries: Vec<Arc<Path>>,
 165    repositories: SumTree<RepositoryEntry>,
 166
 167    /// A number that increases every time the worktree begins scanning
 168    /// a set of paths from the filesystem. This scanning could be caused
 169    /// by some operation performed on the worktree, such as reading or
 170    /// writing a file, or by an event reported by the filesystem.
 171    scan_id: usize,
 172
 173    /// The latest scan id that has completed, and whose preceding scans
 174    /// have all completed. The current `scan_id` could be more than one
 175    /// greater than the `completed_scan_id` if operations are performed
 176    /// on the worktree while it is processing a file-system event.
 177    completed_scan_id: usize,
 178}
 179
 180#[derive(Clone, Debug, PartialEq, Eq)]
 181pub struct RepositoryEntry {
 182    /// The git status entries for this repository.
 183    /// Note that the paths on this repository are relative to the git work directory.
 184    /// If the .git folder is external to Zed, these paths will be relative to that folder,
 185    /// and this data structure might reference files external to this worktree.
 186    ///
 187    /// For example:
 188    ///
 189    ///     my_root_folder/          <-- repository root
 190    ///       .git
 191    ///       my_sub_folder_1/
 192    ///         project_root/        <-- Project root, Zed opened here
 193    ///           changed_file_1     <-- File with changes, in worktree
 194    ///       my_sub_folder_2/
 195    ///         changed_file_2       <-- File with changes, out of worktree
 196    ///           ...
 197    ///
 198    /// With this setup, this field would contain 2 entries, like so:
 199    ///     - my_sub_folder_1/project_root/changed_file_1
 200    ///     - my_sub_folder_2/changed_file_2
 201    pub(crate) statuses_by_path: SumTree<StatusEntry>,
 202    pub work_directory_id: ProjectEntryId,
 203    pub work_directory: WorkDirectory,
 204    pub(crate) branch: Option<Arc<str>>,
 205}
 206
 207impl Deref for RepositoryEntry {
 208    type Target = WorkDirectory;
 209
 210    fn deref(&self) -> &Self::Target {
 211        &self.work_directory
 212    }
 213}
 214
 215impl AsRef<Path> for RepositoryEntry {
 216    fn as_ref(&self) -> &Path {
 217        &self.path
 218    }
 219}
 220
 221impl RepositoryEntry {
 222    pub fn branch(&self) -> Option<Arc<str>> {
 223        self.branch.clone()
 224    }
 225
 226    pub fn work_directory_id(&self) -> ProjectEntryId {
 227        self.work_directory_id
 228    }
 229
 230    pub fn status(&self) -> impl Iterator<Item = StatusEntry> + '_ {
 231        self.statuses_by_path.iter().cloned()
 232    }
 233
 234    pub fn status_len(&self) -> usize {
 235        self.statuses_by_path.summary().item_summary.count
 236    }
 237
 238    pub fn status_summary(&self) -> GitSummary {
 239        self.statuses_by_path.summary().item_summary
 240    }
 241
 242    pub fn status_for_path(&self, path: &RepoPath) -> Option<StatusEntry> {
 243        self.statuses_by_path
 244            .get(&PathKey(path.0.clone()), &())
 245            .cloned()
 246    }
 247
 248    pub fn initial_update(&self) -> proto::RepositoryEntry {
 249        proto::RepositoryEntry {
 250            work_directory_id: self.work_directory_id.to_proto(),
 251            branch: self.branch.as_ref().map(|branch| branch.to_string()),
 252            updated_statuses: self
 253                .statuses_by_path
 254                .iter()
 255                .map(|entry| entry.to_proto())
 256                .collect(),
 257            removed_statuses: Default::default(),
 258        }
 259    }
 260
 261    pub fn build_update(&self, old: &Self) -> proto::RepositoryEntry {
 262        let mut updated_statuses: Vec<proto::StatusEntry> = Vec::new();
 263        let mut removed_statuses: Vec<String> = Vec::new();
 264
 265        let mut new_statuses = self.statuses_by_path.iter().peekable();
 266        let mut old_statuses = old.statuses_by_path.iter().peekable();
 267
 268        let mut current_new_entry = new_statuses.next();
 269        let mut current_old_entry = old_statuses.next();
 270        loop {
 271            match (current_new_entry, current_old_entry) {
 272                (Some(new_entry), Some(old_entry)) => {
 273                    match new_entry.repo_path.cmp(&old_entry.repo_path) {
 274                        Ordering::Less => {
 275                            updated_statuses.push(new_entry.to_proto());
 276                            current_new_entry = new_statuses.next();
 277                        }
 278                        Ordering::Equal => {
 279                            if new_entry.status != old_entry.status {
 280                                updated_statuses.push(new_entry.to_proto());
 281                            }
 282                            current_old_entry = old_statuses.next();
 283                            current_new_entry = new_statuses.next();
 284                        }
 285                        Ordering::Greater => {
 286                            removed_statuses.push(old_entry.repo_path.to_proto());
 287                            current_old_entry = old_statuses.next();
 288                        }
 289                    }
 290                }
 291                (None, Some(old_entry)) => {
 292                    removed_statuses.push(old_entry.repo_path.to_proto());
 293                    current_old_entry = old_statuses.next();
 294                }
 295                (Some(new_entry), None) => {
 296                    updated_statuses.push(new_entry.to_proto());
 297                    current_new_entry = new_statuses.next();
 298                }
 299                (None, None) => break,
 300            }
 301        }
 302
 303        proto::RepositoryEntry {
 304            work_directory_id: self.work_directory_id.to_proto(),
 305            branch: self.branch.as_ref().map(|branch| branch.to_string()),
 306            updated_statuses,
 307            removed_statuses,
 308        }
 309    }
 310}
 311
 312/// This path corresponds to the 'content path' of a repository in relation
 313/// to Zed's project root.
 314/// In the majority of the cases, this is the folder that contains the .git folder.
 315/// But if a sub-folder of a git repository is opened, this corresponds to the
 316/// project root and the .git folder is located in a parent directory.
 317#[derive(Clone, Debug, Ord, PartialOrd, Eq, PartialEq, Hash)]
 318pub struct WorkDirectory {
 319    path: Arc<Path>,
 320
 321    /// If location_in_repo is set, it means the .git folder is external
 322    /// and in a parent folder of the project root.
 323    /// In that case, the work_directory field will point to the
 324    /// project-root and location_in_repo contains the location of the
 325    /// project-root in the repository.
 326    ///
 327    /// Example:
 328    ///
 329    ///     my_root_folder/          <-- repository root
 330    ///       .git
 331    ///       my_sub_folder_1/
 332    ///         project_root/        <-- Project root, Zed opened here
 333    ///           ...
 334    ///
 335    /// For this setup, the attributes will have the following values:
 336    ///
 337    ///     work_directory: pointing to "" entry
 338    ///     location_in_repo: Some("my_sub_folder_1/project_root")
 339    pub(crate) location_in_repo: Option<Arc<Path>>,
 340}
 341
 342impl WorkDirectory {
 343    pub fn path_key(&self) -> PathKey {
 344        PathKey(self.path.clone())
 345    }
 346
 347    /// Returns true if the given path is a child of the work directory.
 348    ///
 349    /// Note that the path may not be a member of this repository, if there
 350    /// is a repository in a directory between these two paths
 351    /// external .git folder in a parent folder of the project root.
 352    pub fn directory_contains(&self, path: impl AsRef<Path>) -> bool {
 353        let path = path.as_ref();
 354        path.starts_with(&self.path)
 355    }
 356
 357    /// relativize returns the given project path relative to the root folder of the
 358    /// repository.
 359    /// If the root of the repository (and its .git folder) are located in a parent folder
 360    /// of the project root folder, then the returned RepoPath is relative to the root
 361    /// of the repository and not a valid path inside the project.
 362    pub fn relativize(&self, path: &Path) -> Result<RepoPath> {
 363        if let Some(location_in_repo) = &self.location_in_repo {
 364            Ok(location_in_repo.join(path).into())
 365        } else {
 366            let relativized_path = path
 367                .strip_prefix(&self.path)
 368                .map_err(|_| anyhow!("could not relativize {:?} against {:?}", path, self.path))?;
 369
 370            Ok(relativized_path.into())
 371        }
 372    }
 373
 374    /// This is the opposite operation to `relativize` above
 375    pub fn unrelativize(&self, path: &RepoPath) -> Option<Arc<Path>> {
 376        if let Some(location) = &self.location_in_repo {
 377            // If we fail to strip the prefix, that means this status entry is
 378            // external to this worktree, and we definitely won't have an entry_id
 379            path.strip_prefix(location).ok().map(Into::into)
 380        } else {
 381            Some(self.path.join(path).into())
 382        }
 383    }
 384}
 385
 386impl Default for WorkDirectory {
 387    fn default() -> Self {
 388        Self {
 389            path: Arc::from(Path::new("")),
 390            location_in_repo: None,
 391        }
 392    }
 393}
 394
 395impl Deref for WorkDirectory {
 396    type Target = Path;
 397
 398    fn deref(&self) -> &Self::Target {
 399        self.as_ref()
 400    }
 401}
 402
 403impl AsRef<Path> for WorkDirectory {
 404    fn as_ref(&self) -> &Path {
 405        self.path.as_ref()
 406    }
 407}
 408
 409#[derive(Clone, Debug, Ord, PartialOrd, Eq, PartialEq)]
 410pub struct WorkDirectoryEntry(ProjectEntryId);
 411
 412impl Deref for WorkDirectoryEntry {
 413    type Target = ProjectEntryId;
 414
 415    fn deref(&self) -> &Self::Target {
 416        &self.0
 417    }
 418}
 419
 420impl From<ProjectEntryId> for WorkDirectoryEntry {
 421    fn from(value: ProjectEntryId) -> Self {
 422        WorkDirectoryEntry(value)
 423    }
 424}
 425
 426#[derive(Debug, Clone)]
 427pub struct LocalSnapshot {
 428    snapshot: Snapshot,
 429    /// All of the gitignore files in the worktree, indexed by their relative path.
 430    /// The boolean indicates whether the gitignore needs to be updated.
 431    ignores_by_parent_abs_path: HashMap<Arc<Path>, (Arc<Gitignore>, bool)>,
 432    /// All of the git repositories in the worktree, indexed by the project entry
 433    /// id of their parent directory.
 434    git_repositories: TreeMap<ProjectEntryId, LocalRepositoryEntry>,
 435    /// The file handle of the root dir
 436    /// (so we can find it after it's been moved)
 437    root_file_handle: Option<Arc<dyn fs::FileHandle>>,
 438}
 439
 440struct BackgroundScannerState {
 441    snapshot: LocalSnapshot,
 442    scanned_dirs: HashSet<ProjectEntryId>,
 443    path_prefixes_to_scan: HashSet<Arc<Path>>,
 444    paths_to_scan: HashSet<Arc<Path>>,
 445    /// The ids of all of the entries that were removed from the snapshot
 446    /// as part of the current update. These entry ids may be re-used
 447    /// if the same inode is discovered at a new path, or if the given
 448    /// path is re-created after being deleted.
 449    removed_entries: HashMap<u64, Entry>,
 450    changed_paths: Vec<Arc<Path>>,
 451    prev_snapshot: Snapshot,
 452    git_hosting_provider_registry: Option<Arc<GitHostingProviderRegistry>>,
 453}
 454
 455#[derive(Debug, Clone)]
 456pub struct LocalRepositoryEntry {
 457    pub(crate) work_directory: WorkDirectory,
 458    pub(crate) git_dir_scan_id: usize,
 459    pub(crate) status_scan_id: usize,
 460    pub(crate) repo_ptr: Arc<dyn GitRepository>,
 461    /// Absolute path to the actual .git folder.
 462    /// Note: if .git is a file, this points to the folder indicated by the .git file
 463    pub(crate) dot_git_dir_abs_path: Arc<Path>,
 464    /// Absolute path to the .git file, if we're in a git worktree.
 465    pub(crate) dot_git_worktree_abs_path: Option<Arc<Path>>,
 466}
 467
 468impl sum_tree::Item for LocalRepositoryEntry {
 469    type Summary = PathSummary<Unit>;
 470
 471    fn summary(&self, _: &<Self::Summary as Summary>::Context) -> Self::Summary {
 472        PathSummary {
 473            max_path: self.work_directory.path.clone(),
 474            item_summary: Unit,
 475        }
 476    }
 477}
 478
 479impl KeyedItem for LocalRepositoryEntry {
 480    type Key = PathKey;
 481
 482    fn key(&self) -> Self::Key {
 483        PathKey(self.work_directory.path.clone())
 484    }
 485}
 486
 487impl LocalRepositoryEntry {
 488    pub fn repo(&self) -> &Arc<dyn GitRepository> {
 489        &self.repo_ptr
 490    }
 491}
 492
 493impl Deref for LocalRepositoryEntry {
 494    type Target = WorkDirectory;
 495
 496    fn deref(&self) -> &Self::Target {
 497        &self.work_directory
 498    }
 499}
 500
 501impl Deref for LocalSnapshot {
 502    type Target = Snapshot;
 503
 504    fn deref(&self) -> &Self::Target {
 505        &self.snapshot
 506    }
 507}
 508
 509impl DerefMut for LocalSnapshot {
 510    fn deref_mut(&mut self) -> &mut Self::Target {
 511        &mut self.snapshot
 512    }
 513}
 514
 515enum ScanState {
 516    Started,
 517    Updated {
 518        snapshot: LocalSnapshot,
 519        changes: UpdatedEntriesSet,
 520        barrier: SmallVec<[barrier::Sender; 1]>,
 521        scanning: bool,
 522    },
 523    RootUpdated {
 524        new_path: Option<SanitizedPath>,
 525    },
 526}
 527
 528struct UpdateObservationState {
 529    snapshots_tx:
 530        mpsc::UnboundedSender<(LocalSnapshot, UpdatedEntriesSet, UpdatedGitRepositoriesSet)>,
 531    resume_updates: watch::Sender<()>,
 532    _maintain_remote_snapshot: Task<Option<()>>,
 533}
 534
 535#[derive(Clone)]
 536pub enum Event {
 537    UpdatedEntries(UpdatedEntriesSet),
 538    UpdatedGitRepositories(UpdatedGitRepositoriesSet),
 539    DeletedEntry(ProjectEntryId),
 540}
 541
 542const EMPTY_PATH: &str = "";
 543
 544impl EventEmitter<Event> for Worktree {}
 545
 546impl Worktree {
 547    pub async fn local(
 548        path: impl Into<Arc<Path>>,
 549        visible: bool,
 550        fs: Arc<dyn Fs>,
 551        next_entry_id: Arc<AtomicUsize>,
 552        cx: &mut AsyncApp,
 553    ) -> Result<Entity<Self>> {
 554        let abs_path = path.into();
 555        let metadata = fs
 556            .metadata(&abs_path)
 557            .await
 558            .context("failed to stat worktree path")?;
 559
 560        let fs_case_sensitive = fs.is_case_sensitive().await.unwrap_or_else(|e| {
 561            log::error!(
 562                "Failed to determine whether filesystem is case sensitive (falling back to true) due to error: {e:#}"
 563            );
 564            true
 565        });
 566
 567        let root_file_handle = fs.open_handle(&abs_path).await.log_err();
 568
 569        cx.new(move |cx: &mut Context<Worktree>| {
 570            let mut snapshot = LocalSnapshot {
 571                ignores_by_parent_abs_path: Default::default(),
 572                git_repositories: Default::default(),
 573                snapshot: Snapshot::new(
 574                    cx.entity_id().as_u64(),
 575                    abs_path
 576                        .file_name()
 577                        .map_or(String::new(), |f| f.to_string_lossy().to_string()),
 578                    abs_path.clone(),
 579                ),
 580                root_file_handle,
 581            };
 582
 583            let worktree_id = snapshot.id();
 584            let settings_location = Some(SettingsLocation {
 585                worktree_id,
 586                path: Path::new(EMPTY_PATH),
 587            });
 588
 589            let settings = WorktreeSettings::get(settings_location, cx).clone();
 590            cx.observe_global::<SettingsStore>(move |this, cx| {
 591                if let Self::Local(this) = this {
 592                    let settings = WorktreeSettings::get(settings_location, cx).clone();
 593                    if this.settings != settings {
 594                        this.settings = settings;
 595                        this.restart_background_scanners(cx);
 596                    }
 597                }
 598            })
 599            .detach();
 600
 601            let share_private_files = false;
 602            if let Some(metadata) = metadata {
 603                let mut entry = Entry::new(
 604                    Arc::from(Path::new("")),
 605                    &metadata,
 606                    &next_entry_id,
 607                    snapshot.root_char_bag,
 608                    None,
 609                );
 610                if !metadata.is_dir {
 611                    entry.is_private = !share_private_files
 612                        && settings.is_path_private(abs_path.file_name().unwrap().as_ref());
 613                }
 614                snapshot.insert_entry(entry, fs.as_ref());
 615            }
 616
 617            let (scan_requests_tx, scan_requests_rx) = channel::unbounded();
 618            let (path_prefixes_to_scan_tx, path_prefixes_to_scan_rx) = channel::unbounded();
 619            let mut worktree = LocalWorktree {
 620                share_private_files,
 621                next_entry_id,
 622                snapshot,
 623                is_scanning: watch::channel_with(true),
 624                update_observer: None,
 625                scan_requests_tx,
 626                path_prefixes_to_scan_tx,
 627                _background_scanner_tasks: Vec::new(),
 628                fs,
 629                fs_case_sensitive,
 630                visible,
 631                settings,
 632            };
 633            worktree.start_background_scanner(scan_requests_rx, path_prefixes_to_scan_rx, cx);
 634            Worktree::Local(worktree)
 635        })
 636    }
 637
 638    pub fn remote(
 639        project_id: u64,
 640        replica_id: ReplicaId,
 641        worktree: proto::WorktreeMetadata,
 642        client: AnyProtoClient,
 643        cx: &mut App,
 644    ) -> Entity<Self> {
 645        cx.new(|cx: &mut Context<Self>| {
 646            let snapshot = Snapshot::new(
 647                worktree.id,
 648                worktree.root_name,
 649                Arc::from(PathBuf::from(worktree.abs_path)),
 650            );
 651
 652            let background_snapshot = Arc::new(Mutex::new((snapshot.clone(), Vec::new())));
 653            let (background_updates_tx, mut background_updates_rx) = mpsc::unbounded();
 654            let (mut snapshot_updated_tx, mut snapshot_updated_rx) = watch::channel();
 655
 656            let worktree_id = snapshot.id();
 657            let settings_location = Some(SettingsLocation {
 658                worktree_id,
 659                path: Path::new(EMPTY_PATH),
 660            });
 661
 662            let settings = WorktreeSettings::get(settings_location, cx).clone();
 663            let worktree = RemoteWorktree {
 664                client,
 665                project_id,
 666                replica_id,
 667                snapshot,
 668                file_scan_inclusions: settings.file_scan_inclusions.clone(),
 669                background_snapshot: background_snapshot.clone(),
 670                updates_tx: Some(background_updates_tx),
 671                update_observer: None,
 672                snapshot_subscriptions: Default::default(),
 673                visible: worktree.visible,
 674                disconnected: false,
 675            };
 676
 677            // Apply updates to a separate snapshot in a background task, then
 678            // send them to a foreground task which updates the model.
 679            cx.background_executor()
 680                .spawn(async move {
 681                    while let Some(update) = background_updates_rx.next().await {
 682                        {
 683                            let mut lock = background_snapshot.lock();
 684                            if let Err(error) = lock
 685                                .0
 686                                .apply_remote_update(update.clone(), &settings.file_scan_inclusions)
 687                            {
 688                                log::error!("error applying worktree update: {}", error);
 689                            }
 690                            lock.1.push(update);
 691                        }
 692                        snapshot_updated_tx.send(()).await.ok();
 693                    }
 694                })
 695                .detach();
 696
 697            // On the foreground task, update to the latest snapshot and notify
 698            // any update observer of all updates that led to that snapshot.
 699            cx.spawn(|this, mut cx| async move {
 700                while (snapshot_updated_rx.recv().await).is_some() {
 701                    this.update(&mut cx, |this, cx| {
 702                        let this = this.as_remote_mut().unwrap();
 703                        {
 704                            let mut lock = this.background_snapshot.lock();
 705                            this.snapshot = lock.0.clone();
 706                            if let Some(tx) = &this.update_observer {
 707                                for update in lock.1.drain(..) {
 708                                    tx.unbounded_send(update).ok();
 709                                }
 710                            }
 711                        };
 712                        cx.emit(Event::UpdatedEntries(Arc::default()));
 713                        cx.notify();
 714                        while let Some((scan_id, _)) = this.snapshot_subscriptions.front() {
 715                            if this.observed_snapshot(*scan_id) {
 716                                let (_, tx) = this.snapshot_subscriptions.pop_front().unwrap();
 717                                let _ = tx.send(());
 718                            } else {
 719                                break;
 720                            }
 721                        }
 722                    })?;
 723                }
 724                anyhow::Ok(())
 725            })
 726            .detach();
 727
 728            Worktree::Remote(worktree)
 729        })
 730    }
 731
 732    pub fn as_local(&self) -> Option<&LocalWorktree> {
 733        if let Worktree::Local(worktree) = self {
 734            Some(worktree)
 735        } else {
 736            None
 737        }
 738    }
 739
 740    pub fn as_remote(&self) -> Option<&RemoteWorktree> {
 741        if let Worktree::Remote(worktree) = self {
 742            Some(worktree)
 743        } else {
 744            None
 745        }
 746    }
 747
 748    pub fn as_local_mut(&mut self) -> Option<&mut LocalWorktree> {
 749        if let Worktree::Local(worktree) = self {
 750            Some(worktree)
 751        } else {
 752            None
 753        }
 754    }
 755
 756    pub fn as_remote_mut(&mut self) -> Option<&mut RemoteWorktree> {
 757        if let Worktree::Remote(worktree) = self {
 758            Some(worktree)
 759        } else {
 760            None
 761        }
 762    }
 763
 764    pub fn is_local(&self) -> bool {
 765        matches!(self, Worktree::Local(_))
 766    }
 767
 768    pub fn is_remote(&self) -> bool {
 769        !self.is_local()
 770    }
 771
 772    pub fn settings_location(&self, _: &Context<Self>) -> SettingsLocation<'static> {
 773        SettingsLocation {
 774            worktree_id: self.id(),
 775            path: Path::new(EMPTY_PATH),
 776        }
 777    }
 778
 779    pub fn snapshot(&self) -> Snapshot {
 780        match self {
 781            Worktree::Local(worktree) => worktree.snapshot.snapshot.clone(),
 782            Worktree::Remote(worktree) => worktree.snapshot.clone(),
 783        }
 784    }
 785
 786    pub fn scan_id(&self) -> usize {
 787        match self {
 788            Worktree::Local(worktree) => worktree.snapshot.scan_id,
 789            Worktree::Remote(worktree) => worktree.snapshot.scan_id,
 790        }
 791    }
 792
 793    pub fn metadata_proto(&self) -> proto::WorktreeMetadata {
 794        proto::WorktreeMetadata {
 795            id: self.id().to_proto(),
 796            root_name: self.root_name().to_string(),
 797            visible: self.is_visible(),
 798            abs_path: self.abs_path().as_os_str().to_string_lossy().into(),
 799        }
 800    }
 801
 802    pub fn completed_scan_id(&self) -> usize {
 803        match self {
 804            Worktree::Local(worktree) => worktree.snapshot.completed_scan_id,
 805            Worktree::Remote(worktree) => worktree.snapshot.completed_scan_id,
 806        }
 807    }
 808
 809    pub fn is_visible(&self) -> bool {
 810        match self {
 811            Worktree::Local(worktree) => worktree.visible,
 812            Worktree::Remote(worktree) => worktree.visible,
 813        }
 814    }
 815
 816    pub fn replica_id(&self) -> ReplicaId {
 817        match self {
 818            Worktree::Local(_) => 0,
 819            Worktree::Remote(worktree) => worktree.replica_id,
 820        }
 821    }
 822
 823    pub fn abs_path(&self) -> Arc<Path> {
 824        match self {
 825            Worktree::Local(worktree) => worktree.abs_path.clone().into(),
 826            Worktree::Remote(worktree) => worktree.abs_path.clone().into(),
 827        }
 828    }
 829
 830    pub fn root_file(&self, cx: &Context<Self>) -> Option<Arc<File>> {
 831        let entry = self.root_entry()?;
 832        Some(File::for_entry(entry.clone(), cx.entity()))
 833    }
 834
 835    pub fn observe_updates<F, Fut>(&mut self, project_id: u64, cx: &Context<Worktree>, callback: F)
 836    where
 837        F: 'static + Send + Fn(proto::UpdateWorktree) -> Fut,
 838        Fut: 'static + Send + Future<Output = bool>,
 839    {
 840        match self {
 841            Worktree::Local(this) => this.observe_updates(project_id, cx, callback),
 842            Worktree::Remote(this) => this.observe_updates(project_id, cx, callback),
 843        }
 844    }
 845
 846    pub fn stop_observing_updates(&mut self) {
 847        match self {
 848            Worktree::Local(this) => {
 849                this.update_observer.take();
 850            }
 851            Worktree::Remote(this) => {
 852                this.update_observer.take();
 853            }
 854        }
 855    }
 856
 857    #[cfg(any(test, feature = "test-support"))]
 858    pub fn has_update_observer(&self) -> bool {
 859        match self {
 860            Worktree::Local(this) => this.update_observer.is_some(),
 861            Worktree::Remote(this) => this.update_observer.is_some(),
 862        }
 863    }
 864
 865    pub fn load_file(&self, path: &Path, cx: &Context<Worktree>) -> Task<Result<LoadedFile>> {
 866        match self {
 867            Worktree::Local(this) => this.load_file(path, cx),
 868            Worktree::Remote(_) => {
 869                Task::ready(Err(anyhow!("remote worktrees can't yet load files")))
 870            }
 871        }
 872    }
 873
 874    pub fn load_staged_file(&self, path: &Path, cx: &App) -> Task<Result<Option<String>>> {
 875        match self {
 876            Worktree::Local(this) => {
 877                let path = Arc::from(path);
 878                let snapshot = this.snapshot();
 879                cx.background_executor().spawn(async move {
 880                    if let Some(repo) = snapshot.repository_for_path(&path) {
 881                        if let Some(repo_path) = repo.relativize(&path).log_err() {
 882                            if let Some(git_repo) =
 883                                snapshot.git_repositories.get(&repo.work_directory_id)
 884                            {
 885                                return Ok(git_repo.repo_ptr.load_index_text(&repo_path));
 886                            }
 887                        }
 888                    }
 889                    Ok(None)
 890                })
 891            }
 892            Worktree::Remote(_) => {
 893                Task::ready(Err(anyhow!("remote worktrees can't yet load staged files")))
 894            }
 895        }
 896    }
 897
 898    pub fn load_binary_file(
 899        &self,
 900        path: &Path,
 901        cx: &Context<Worktree>,
 902    ) -> Task<Result<LoadedBinaryFile>> {
 903        match self {
 904            Worktree::Local(this) => this.load_binary_file(path, cx),
 905            Worktree::Remote(_) => {
 906                Task::ready(Err(anyhow!("remote worktrees can't yet load binary files")))
 907            }
 908        }
 909    }
 910
 911    pub fn write_file(
 912        &self,
 913        path: &Path,
 914        text: Rope,
 915        line_ending: LineEnding,
 916        cx: &Context<Worktree>,
 917    ) -> Task<Result<Arc<File>>> {
 918        match self {
 919            Worktree::Local(this) => this.write_file(path, text, line_ending, cx),
 920            Worktree::Remote(_) => {
 921                Task::ready(Err(anyhow!("remote worktree can't yet write files")))
 922            }
 923        }
 924    }
 925
 926    pub fn create_entry(
 927        &mut self,
 928        path: impl Into<Arc<Path>>,
 929        is_directory: bool,
 930        cx: &Context<Worktree>,
 931    ) -> Task<Result<CreatedEntry>> {
 932        let path = path.into();
 933        let worktree_id = self.id();
 934        match self {
 935            Worktree::Local(this) => this.create_entry(path, is_directory, cx),
 936            Worktree::Remote(this) => {
 937                let project_id = this.project_id;
 938                let request = this.client.request(proto::CreateProjectEntry {
 939                    worktree_id: worktree_id.to_proto(),
 940                    project_id,
 941                    path: path.to_string_lossy().into(),
 942                    is_directory,
 943                });
 944                cx.spawn(move |this, mut cx| async move {
 945                    let response = request.await?;
 946                    match response.entry {
 947                        Some(entry) => this
 948                            .update(&mut cx, |worktree, cx| {
 949                                worktree.as_remote_mut().unwrap().insert_entry(
 950                                    entry,
 951                                    response.worktree_scan_id as usize,
 952                                    cx,
 953                                )
 954                            })?
 955                            .await
 956                            .map(CreatedEntry::Included),
 957                        None => {
 958                            let abs_path = this.update(&mut cx, |worktree, _| {
 959                                worktree
 960                                    .absolutize(&path)
 961                                    .with_context(|| format!("absolutizing {path:?}"))
 962                            })??;
 963                            Ok(CreatedEntry::Excluded { abs_path })
 964                        }
 965                    }
 966                })
 967            }
 968        }
 969    }
 970
 971    pub fn delete_entry(
 972        &mut self,
 973        entry_id: ProjectEntryId,
 974        trash: bool,
 975        cx: &mut Context<Worktree>,
 976    ) -> Option<Task<Result<()>>> {
 977        let task = match self {
 978            Worktree::Local(this) => this.delete_entry(entry_id, trash, cx),
 979            Worktree::Remote(this) => this.delete_entry(entry_id, trash, cx),
 980        }?;
 981
 982        let entry = match self {
 983            Worktree::Local(ref this) => this.entry_for_id(entry_id),
 984            Worktree::Remote(ref this) => this.entry_for_id(entry_id),
 985        }?;
 986
 987        let mut ids = vec![entry_id];
 988        let path = &*entry.path;
 989
 990        self.get_children_ids_recursive(path, &mut ids);
 991
 992        for id in ids {
 993            cx.emit(Event::DeletedEntry(id));
 994        }
 995        Some(task)
 996    }
 997
 998    fn get_children_ids_recursive(&self, path: &Path, ids: &mut Vec<ProjectEntryId>) {
 999        let children_iter = self.child_entries(path);
1000        for child in children_iter {
1001            ids.push(child.id);
1002            self.get_children_ids_recursive(&child.path, ids);
1003        }
1004    }
1005
1006    pub fn rename_entry(
1007        &mut self,
1008        entry_id: ProjectEntryId,
1009        new_path: impl Into<Arc<Path>>,
1010        cx: &Context<Self>,
1011    ) -> Task<Result<CreatedEntry>> {
1012        let new_path = new_path.into();
1013        match self {
1014            Worktree::Local(this) => this.rename_entry(entry_id, new_path, cx),
1015            Worktree::Remote(this) => this.rename_entry(entry_id, new_path, cx),
1016        }
1017    }
1018
1019    pub fn copy_entry(
1020        &mut self,
1021        entry_id: ProjectEntryId,
1022        relative_worktree_source_path: Option<PathBuf>,
1023        new_path: impl Into<Arc<Path>>,
1024        cx: &Context<Self>,
1025    ) -> Task<Result<Option<Entry>>> {
1026        let new_path = new_path.into();
1027        match self {
1028            Worktree::Local(this) => {
1029                this.copy_entry(entry_id, relative_worktree_source_path, new_path, cx)
1030            }
1031            Worktree::Remote(this) => {
1032                let relative_worktree_source_path =
1033                    relative_worktree_source_path.map(|relative_worktree_source_path| {
1034                        relative_worktree_source_path.to_string_lossy().into()
1035                    });
1036                let response = this.client.request(proto::CopyProjectEntry {
1037                    project_id: this.project_id,
1038                    entry_id: entry_id.to_proto(),
1039                    relative_worktree_source_path,
1040                    new_path: new_path.to_string_lossy().into(),
1041                });
1042                cx.spawn(move |this, mut cx| async move {
1043                    let response = response.await?;
1044                    match response.entry {
1045                        Some(entry) => this
1046                            .update(&mut cx, |worktree, cx| {
1047                                worktree.as_remote_mut().unwrap().insert_entry(
1048                                    entry,
1049                                    response.worktree_scan_id as usize,
1050                                    cx,
1051                                )
1052                            })?
1053                            .await
1054                            .map(Some),
1055                        None => Ok(None),
1056                    }
1057                })
1058            }
1059        }
1060    }
1061
1062    pub fn copy_external_entries(
1063        &mut self,
1064        target_directory: PathBuf,
1065        paths: Vec<Arc<Path>>,
1066        overwrite_existing_files: bool,
1067        cx: &Context<Worktree>,
1068    ) -> Task<Result<Vec<ProjectEntryId>>> {
1069        match self {
1070            Worktree::Local(this) => {
1071                this.copy_external_entries(target_directory, paths, overwrite_existing_files, cx)
1072            }
1073            _ => Task::ready(Err(anyhow!(
1074                "Copying external entries is not supported for remote worktrees"
1075            ))),
1076        }
1077    }
1078
1079    pub fn expand_entry(
1080        &mut self,
1081        entry_id: ProjectEntryId,
1082        cx: &Context<Worktree>,
1083    ) -> Option<Task<Result<()>>> {
1084        match self {
1085            Worktree::Local(this) => this.expand_entry(entry_id, cx),
1086            Worktree::Remote(this) => {
1087                let response = this.client.request(proto::ExpandProjectEntry {
1088                    project_id: this.project_id,
1089                    entry_id: entry_id.to_proto(),
1090                });
1091                Some(cx.spawn(move |this, mut cx| async move {
1092                    let response = response.await?;
1093                    this.update(&mut cx, |this, _| {
1094                        this.as_remote_mut()
1095                            .unwrap()
1096                            .wait_for_snapshot(response.worktree_scan_id as usize)
1097                    })?
1098                    .await?;
1099                    Ok(())
1100                }))
1101            }
1102        }
1103    }
1104
1105    pub fn expand_all_for_entry(
1106        &mut self,
1107        entry_id: ProjectEntryId,
1108        cx: &Context<Worktree>,
1109    ) -> Option<Task<Result<()>>> {
1110        match self {
1111            Worktree::Local(this) => this.expand_all_for_entry(entry_id, cx),
1112            Worktree::Remote(this) => {
1113                let response = this.client.request(proto::ExpandAllForProjectEntry {
1114                    project_id: this.project_id,
1115                    entry_id: entry_id.to_proto(),
1116                });
1117                Some(cx.spawn(move |this, mut cx| async move {
1118                    let response = response.await?;
1119                    this.update(&mut cx, |this, _| {
1120                        this.as_remote_mut()
1121                            .unwrap()
1122                            .wait_for_snapshot(response.worktree_scan_id as usize)
1123                    })?
1124                    .await?;
1125                    Ok(())
1126                }))
1127            }
1128        }
1129    }
1130
1131    pub async fn handle_create_entry(
1132        this: Entity<Self>,
1133        request: proto::CreateProjectEntry,
1134        mut cx: AsyncApp,
1135    ) -> Result<proto::ProjectEntryResponse> {
1136        let (scan_id, entry) = this.update(&mut cx, |this, cx| {
1137            (
1138                this.scan_id(),
1139                this.create_entry(PathBuf::from(request.path), request.is_directory, cx),
1140            )
1141        })?;
1142        Ok(proto::ProjectEntryResponse {
1143            entry: match &entry.await? {
1144                CreatedEntry::Included(entry) => Some(entry.into()),
1145                CreatedEntry::Excluded { .. } => None,
1146            },
1147            worktree_scan_id: scan_id as u64,
1148        })
1149    }
1150
1151    pub async fn handle_delete_entry(
1152        this: Entity<Self>,
1153        request: proto::DeleteProjectEntry,
1154        mut cx: AsyncApp,
1155    ) -> Result<proto::ProjectEntryResponse> {
1156        let (scan_id, task) = this.update(&mut cx, |this, cx| {
1157            (
1158                this.scan_id(),
1159                this.delete_entry(
1160                    ProjectEntryId::from_proto(request.entry_id),
1161                    request.use_trash,
1162                    cx,
1163                ),
1164            )
1165        })?;
1166        task.ok_or_else(|| anyhow!("invalid entry"))?.await?;
1167        Ok(proto::ProjectEntryResponse {
1168            entry: None,
1169            worktree_scan_id: scan_id as u64,
1170        })
1171    }
1172
1173    pub async fn handle_expand_entry(
1174        this: Entity<Self>,
1175        request: proto::ExpandProjectEntry,
1176        mut cx: AsyncApp,
1177    ) -> Result<proto::ExpandProjectEntryResponse> {
1178        let task = this.update(&mut cx, |this, cx| {
1179            this.expand_entry(ProjectEntryId::from_proto(request.entry_id), cx)
1180        })?;
1181        task.ok_or_else(|| anyhow!("no such entry"))?.await?;
1182        let scan_id = this.read_with(&cx, |this, _| this.scan_id())?;
1183        Ok(proto::ExpandProjectEntryResponse {
1184            worktree_scan_id: scan_id as u64,
1185        })
1186    }
1187
1188    pub async fn handle_expand_all_for_entry(
1189        this: Entity<Self>,
1190        request: proto::ExpandAllForProjectEntry,
1191        mut cx: AsyncApp,
1192    ) -> Result<proto::ExpandAllForProjectEntryResponse> {
1193        let task = this.update(&mut cx, |this, cx| {
1194            this.expand_all_for_entry(ProjectEntryId::from_proto(request.entry_id), cx)
1195        })?;
1196        task.ok_or_else(|| anyhow!("no such entry"))?.await?;
1197        let scan_id = this.read_with(&cx, |this, _| this.scan_id())?;
1198        Ok(proto::ExpandAllForProjectEntryResponse {
1199            worktree_scan_id: scan_id as u64,
1200        })
1201    }
1202
1203    pub async fn handle_rename_entry(
1204        this: Entity<Self>,
1205        request: proto::RenameProjectEntry,
1206        mut cx: AsyncApp,
1207    ) -> Result<proto::ProjectEntryResponse> {
1208        let (scan_id, task) = this.update(&mut cx, |this, cx| {
1209            (
1210                this.scan_id(),
1211                this.rename_entry(
1212                    ProjectEntryId::from_proto(request.entry_id),
1213                    PathBuf::from(request.new_path),
1214                    cx,
1215                ),
1216            )
1217        })?;
1218        Ok(proto::ProjectEntryResponse {
1219            entry: match &task.await? {
1220                CreatedEntry::Included(entry) => Some(entry.into()),
1221                CreatedEntry::Excluded { .. } => None,
1222            },
1223            worktree_scan_id: scan_id as u64,
1224        })
1225    }
1226
1227    pub async fn handle_copy_entry(
1228        this: Entity<Self>,
1229        request: proto::CopyProjectEntry,
1230        mut cx: AsyncApp,
1231    ) -> Result<proto::ProjectEntryResponse> {
1232        let (scan_id, task) = this.update(&mut cx, |this, cx| {
1233            let relative_worktree_source_path =
1234                request.relative_worktree_source_path.map(PathBuf::from);
1235            (
1236                this.scan_id(),
1237                this.copy_entry(
1238                    ProjectEntryId::from_proto(request.entry_id),
1239                    relative_worktree_source_path,
1240                    PathBuf::from(request.new_path),
1241                    cx,
1242                ),
1243            )
1244        })?;
1245        Ok(proto::ProjectEntryResponse {
1246            entry: task.await?.as_ref().map(|e| e.into()),
1247            worktree_scan_id: scan_id as u64,
1248        })
1249    }
1250}
1251
1252impl LocalWorktree {
1253    pub fn fs(&self) -> &Arc<dyn Fs> {
1254        &self.fs
1255    }
1256
1257    pub fn contains_abs_path(&self, path: &Path) -> bool {
1258        let path = SanitizedPath::from(path);
1259        path.starts_with(&self.abs_path)
1260    }
1261
1262    pub fn is_path_private(&self, path: &Path) -> bool {
1263        !self.share_private_files && self.settings.is_path_private(path)
1264    }
1265
1266    fn restart_background_scanners(&mut self, cx: &Context<Worktree>) {
1267        let (scan_requests_tx, scan_requests_rx) = channel::unbounded();
1268        let (path_prefixes_to_scan_tx, path_prefixes_to_scan_rx) = channel::unbounded();
1269        self.scan_requests_tx = scan_requests_tx;
1270        self.path_prefixes_to_scan_tx = path_prefixes_to_scan_tx;
1271
1272        self.start_background_scanner(scan_requests_rx, path_prefixes_to_scan_rx, cx);
1273        let always_included_entries = mem::take(&mut self.snapshot.always_included_entries);
1274        log::debug!(
1275            "refreshing entries for the following always included paths: {:?}",
1276            always_included_entries
1277        );
1278
1279        // Cleans up old always included entries to ensure they get updated properly. Otherwise,
1280        // nested always included entries may not get updated and will result in out-of-date info.
1281        self.refresh_entries_for_paths(always_included_entries);
1282    }
1283
1284    fn start_background_scanner(
1285        &mut self,
1286        scan_requests_rx: channel::Receiver<ScanRequest>,
1287        path_prefixes_to_scan_rx: channel::Receiver<PathPrefixScanRequest>,
1288        cx: &Context<Worktree>,
1289    ) {
1290        let snapshot = self.snapshot();
1291        let share_private_files = self.share_private_files;
1292        let next_entry_id = self.next_entry_id.clone();
1293        let fs = self.fs.clone();
1294        let git_hosting_provider_registry = GitHostingProviderRegistry::try_global(cx);
1295        let settings = self.settings.clone();
1296        let (scan_states_tx, mut scan_states_rx) = mpsc::unbounded();
1297        let background_scanner = cx.background_executor().spawn({
1298            let abs_path = &snapshot.abs_path;
1299            #[cfg(target_os = "windows")]
1300            let abs_path = abs_path
1301                .as_path()
1302                .canonicalize()
1303                .unwrap_or_else(|_| abs_path.as_path().to_path_buf());
1304            #[cfg(not(target_os = "windows"))]
1305            let abs_path = abs_path.as_path().to_path_buf();
1306            let background = cx.background_executor().clone();
1307            async move {
1308                let (events, watcher) = fs.watch(&abs_path, FS_WATCH_LATENCY).await;
1309                let fs_case_sensitive = fs.is_case_sensitive().await.unwrap_or_else(|e| {
1310                    log::error!("Failed to determine whether filesystem is case sensitive: {e:#}");
1311                    true
1312                });
1313
1314                let mut scanner = BackgroundScanner {
1315                    fs,
1316                    fs_case_sensitive,
1317                    status_updates_tx: scan_states_tx,
1318                    executor: background,
1319                    scan_requests_rx,
1320                    path_prefixes_to_scan_rx,
1321                    next_entry_id,
1322                    state: Mutex::new(BackgroundScannerState {
1323                        prev_snapshot: snapshot.snapshot.clone(),
1324                        snapshot,
1325                        scanned_dirs: Default::default(),
1326                        path_prefixes_to_scan: Default::default(),
1327                        paths_to_scan: Default::default(),
1328                        removed_entries: Default::default(),
1329                        changed_paths: Default::default(),
1330                        git_hosting_provider_registry,
1331                    }),
1332                    phase: BackgroundScannerPhase::InitialScan,
1333                    share_private_files,
1334                    settings,
1335                    watcher,
1336                };
1337
1338                scanner
1339                    .run(Box::pin(
1340                        events.map(|events| events.into_iter().map(Into::into).collect()),
1341                    ))
1342                    .await;
1343            }
1344        });
1345        let scan_state_updater = cx.spawn(|this, mut cx| async move {
1346            while let Some((state, this)) = scan_states_rx.next().await.zip(this.upgrade()) {
1347                this.update(&mut cx, |this, cx| {
1348                    let this = this.as_local_mut().unwrap();
1349                    match state {
1350                        ScanState::Started => {
1351                            *this.is_scanning.0.borrow_mut() = true;
1352                        }
1353                        ScanState::Updated {
1354                            snapshot,
1355                            changes,
1356                            barrier,
1357                            scanning,
1358                        } => {
1359                            *this.is_scanning.0.borrow_mut() = scanning;
1360                            this.set_snapshot(snapshot, changes, cx);
1361                            drop(barrier);
1362                        }
1363                        ScanState::RootUpdated { new_path } => {
1364                            if let Some(new_path) = new_path {
1365                                this.snapshot.git_repositories = Default::default();
1366                                this.snapshot.ignores_by_parent_abs_path = Default::default();
1367                                let root_name = new_path
1368                                    .as_path()
1369                                    .file_name()
1370                                    .map_or(String::new(), |f| f.to_string_lossy().to_string());
1371                                this.snapshot.update_abs_path(new_path, root_name);
1372                            }
1373                            this.restart_background_scanners(cx);
1374                        }
1375                    }
1376                    cx.notify();
1377                })
1378                .ok();
1379            }
1380        });
1381        self._background_scanner_tasks = vec![background_scanner, scan_state_updater];
1382        self.is_scanning = watch::channel_with(true);
1383    }
1384
1385    fn set_snapshot(
1386        &mut self,
1387        new_snapshot: LocalSnapshot,
1388        entry_changes: UpdatedEntriesSet,
1389        cx: &mut Context<Worktree>,
1390    ) {
1391        let repo_changes = self.changed_repos(&self.snapshot, &new_snapshot);
1392        self.snapshot = new_snapshot;
1393
1394        if let Some(share) = self.update_observer.as_mut() {
1395            share
1396                .snapshots_tx
1397                .unbounded_send((
1398                    self.snapshot.clone(),
1399                    entry_changes.clone(),
1400                    repo_changes.clone(),
1401                ))
1402                .ok();
1403        }
1404
1405        if !entry_changes.is_empty() {
1406            cx.emit(Event::UpdatedEntries(entry_changes));
1407        }
1408        if !repo_changes.is_empty() {
1409            cx.emit(Event::UpdatedGitRepositories(repo_changes));
1410        }
1411    }
1412
1413    fn changed_repos(
1414        &self,
1415        old_snapshot: &LocalSnapshot,
1416        new_snapshot: &LocalSnapshot,
1417    ) -> UpdatedGitRepositoriesSet {
1418        let mut changes = Vec::new();
1419        let mut old_repos = old_snapshot.git_repositories.iter().peekable();
1420        let mut new_repos = new_snapshot.git_repositories.iter().peekable();
1421
1422        loop {
1423            match (new_repos.peek().map(clone), old_repos.peek().map(clone)) {
1424                (Some((new_entry_id, new_repo)), Some((old_entry_id, old_repo))) => {
1425                    match Ord::cmp(&new_entry_id, &old_entry_id) {
1426                        Ordering::Less => {
1427                            if let Some(entry) = new_snapshot.entry_for_id(new_entry_id) {
1428                                changes.push((
1429                                    entry.path.clone(),
1430                                    GitRepositoryChange {
1431                                        old_repository: None,
1432                                    },
1433                                ));
1434                            }
1435                            new_repos.next();
1436                        }
1437                        Ordering::Equal => {
1438                            if new_repo.git_dir_scan_id != old_repo.git_dir_scan_id
1439                                || new_repo.status_scan_id != old_repo.status_scan_id
1440                            {
1441                                if let Some(entry) = new_snapshot.entry_for_id(new_entry_id) {
1442                                    let old_repo = old_snapshot
1443                                        .repositories
1444                                        .get(&PathKey(entry.path.clone()), &())
1445                                        .cloned();
1446                                    changes.push((
1447                                        entry.path.clone(),
1448                                        GitRepositoryChange {
1449                                            old_repository: old_repo,
1450                                        },
1451                                    ));
1452                                }
1453                            }
1454                            new_repos.next();
1455                            old_repos.next();
1456                        }
1457                        Ordering::Greater => {
1458                            if let Some(entry) = old_snapshot.entry_for_id(old_entry_id) {
1459                                let old_repo = old_snapshot
1460                                    .repositories
1461                                    .get(&PathKey(entry.path.clone()), &())
1462                                    .cloned();
1463                                changes.push((
1464                                    entry.path.clone(),
1465                                    GitRepositoryChange {
1466                                        old_repository: old_repo,
1467                                    },
1468                                ));
1469                            }
1470                            old_repos.next();
1471                        }
1472                    }
1473                }
1474                (Some((entry_id, _)), None) => {
1475                    if let Some(entry) = new_snapshot.entry_for_id(entry_id) {
1476                        changes.push((
1477                            entry.path.clone(),
1478                            GitRepositoryChange {
1479                                old_repository: None,
1480                            },
1481                        ));
1482                    }
1483                    new_repos.next();
1484                }
1485                (None, Some((entry_id, _))) => {
1486                    if let Some(entry) = old_snapshot.entry_for_id(entry_id) {
1487                        let old_repo = old_snapshot
1488                            .repositories
1489                            .get(&PathKey(entry.path.clone()), &())
1490                            .cloned();
1491                        changes.push((
1492                            entry.path.clone(),
1493                            GitRepositoryChange {
1494                                old_repository: old_repo,
1495                            },
1496                        ));
1497                    }
1498                    old_repos.next();
1499                }
1500                (None, None) => break,
1501            }
1502        }
1503
1504        fn clone<T: Clone, U: Clone>(value: &(&T, &U)) -> (T, U) {
1505            (value.0.clone(), value.1.clone())
1506        }
1507
1508        changes.into()
1509    }
1510
1511    pub fn scan_complete(&self) -> impl Future<Output = ()> {
1512        let mut is_scanning_rx = self.is_scanning.1.clone();
1513        async move {
1514            let mut is_scanning = *is_scanning_rx.borrow();
1515            while is_scanning {
1516                if let Some(value) = is_scanning_rx.recv().await {
1517                    is_scanning = value;
1518                } else {
1519                    break;
1520                }
1521            }
1522        }
1523    }
1524
1525    pub fn snapshot(&self) -> LocalSnapshot {
1526        self.snapshot.clone()
1527    }
1528
1529    pub fn settings(&self) -> WorktreeSettings {
1530        self.settings.clone()
1531    }
1532
1533    pub fn local_git_repo(&self, path: &Path) -> Option<Arc<dyn GitRepository>> {
1534        self.local_repo_for_path(path)
1535            .map(|local_repo| local_repo.repo_ptr.clone())
1536    }
1537
1538    pub fn get_local_repo(&self, repo: &RepositoryEntry) -> Option<&LocalRepositoryEntry> {
1539        self.git_repositories.get(&repo.work_directory_id)
1540    }
1541
1542    fn load_binary_file(
1543        &self,
1544        path: &Path,
1545        cx: &Context<Worktree>,
1546    ) -> Task<Result<LoadedBinaryFile>> {
1547        let path = Arc::from(path);
1548        let abs_path = self.absolutize(&path);
1549        let fs = self.fs.clone();
1550        let entry = self.refresh_entry(path.clone(), None, cx);
1551        let is_private = self.is_path_private(path.as_ref());
1552
1553        let worktree = cx.weak_entity();
1554        cx.background_executor().spawn(async move {
1555            let abs_path = abs_path?;
1556            let content = fs.load_bytes(&abs_path).await?;
1557
1558            let worktree = worktree
1559                .upgrade()
1560                .ok_or_else(|| anyhow!("worktree was dropped"))?;
1561            let file = match entry.await? {
1562                Some(entry) => File::for_entry(entry, worktree),
1563                None => {
1564                    let metadata = fs
1565                        .metadata(&abs_path)
1566                        .await
1567                        .with_context(|| {
1568                            format!("Loading metadata for excluded file {abs_path:?}")
1569                        })?
1570                        .with_context(|| {
1571                            format!("Excluded file {abs_path:?} got removed during loading")
1572                        })?;
1573                    Arc::new(File {
1574                        entry_id: None,
1575                        worktree,
1576                        path,
1577                        disk_state: DiskState::Present {
1578                            mtime: metadata.mtime,
1579                        },
1580                        is_local: true,
1581                        is_private,
1582                    })
1583                }
1584            };
1585
1586            Ok(LoadedBinaryFile { file, content })
1587        })
1588    }
1589
1590    fn load_file(&self, path: &Path, cx: &Context<Worktree>) -> Task<Result<LoadedFile>> {
1591        let path = Arc::from(path);
1592        let abs_path = self.absolutize(&path);
1593        let fs = self.fs.clone();
1594        let entry = self.refresh_entry(path.clone(), None, cx);
1595        let is_private = self.is_path_private(path.as_ref());
1596
1597        cx.spawn(|this, _cx| async move {
1598            let abs_path = abs_path?;
1599            let text = fs.load(&abs_path).await?;
1600
1601            let worktree = this
1602                .upgrade()
1603                .ok_or_else(|| anyhow!("worktree was dropped"))?;
1604            let file = match entry.await? {
1605                Some(entry) => File::for_entry(entry, worktree),
1606                None => {
1607                    let metadata = fs
1608                        .metadata(&abs_path)
1609                        .await
1610                        .with_context(|| {
1611                            format!("Loading metadata for excluded file {abs_path:?}")
1612                        })?
1613                        .with_context(|| {
1614                            format!("Excluded file {abs_path:?} got removed during loading")
1615                        })?;
1616                    Arc::new(File {
1617                        entry_id: None,
1618                        worktree,
1619                        path,
1620                        disk_state: DiskState::Present {
1621                            mtime: metadata.mtime,
1622                        },
1623                        is_local: true,
1624                        is_private,
1625                    })
1626                }
1627            };
1628
1629            Ok(LoadedFile { file, text })
1630        })
1631    }
1632
1633    /// Find the lowest path in the worktree's datastructures that is an ancestor
1634    fn lowest_ancestor(&self, path: &Path) -> PathBuf {
1635        let mut lowest_ancestor = None;
1636        for path in path.ancestors() {
1637            if self.entry_for_path(path).is_some() {
1638                lowest_ancestor = Some(path.to_path_buf());
1639                break;
1640            }
1641        }
1642
1643        lowest_ancestor.unwrap_or_else(|| PathBuf::from(""))
1644    }
1645
1646    fn create_entry(
1647        &self,
1648        path: impl Into<Arc<Path>>,
1649        is_dir: bool,
1650        cx: &Context<Worktree>,
1651    ) -> Task<Result<CreatedEntry>> {
1652        let path = path.into();
1653        let abs_path = match self.absolutize(&path) {
1654            Ok(path) => path,
1655            Err(e) => return Task::ready(Err(e.context(format!("absolutizing path {path:?}")))),
1656        };
1657        let path_excluded = self.settings.is_path_excluded(&abs_path);
1658        let fs = self.fs.clone();
1659        let task_abs_path = abs_path.clone();
1660        let write = cx.background_executor().spawn(async move {
1661            if is_dir {
1662                fs.create_dir(&task_abs_path)
1663                    .await
1664                    .with_context(|| format!("creating directory {task_abs_path:?}"))
1665            } else {
1666                fs.save(&task_abs_path, &Rope::default(), LineEnding::default())
1667                    .await
1668                    .with_context(|| format!("creating file {task_abs_path:?}"))
1669            }
1670        });
1671
1672        let lowest_ancestor = self.lowest_ancestor(&path);
1673        cx.spawn(|this, mut cx| async move {
1674            write.await?;
1675            if path_excluded {
1676                return Ok(CreatedEntry::Excluded { abs_path });
1677            }
1678
1679            let (result, refreshes) = this.update(&mut cx, |this, cx| {
1680                let mut refreshes = Vec::new();
1681                let refresh_paths = path.strip_prefix(&lowest_ancestor).unwrap();
1682                for refresh_path in refresh_paths.ancestors() {
1683                    if refresh_path == Path::new("") {
1684                        continue;
1685                    }
1686                    let refresh_full_path = lowest_ancestor.join(refresh_path);
1687
1688                    refreshes.push(this.as_local_mut().unwrap().refresh_entry(
1689                        refresh_full_path.into(),
1690                        None,
1691                        cx,
1692                    ));
1693                }
1694                (
1695                    this.as_local_mut().unwrap().refresh_entry(path, None, cx),
1696                    refreshes,
1697                )
1698            })?;
1699            for refresh in refreshes {
1700                refresh.await.log_err();
1701            }
1702
1703            Ok(result
1704                .await?
1705                .map(CreatedEntry::Included)
1706                .unwrap_or_else(|| CreatedEntry::Excluded { abs_path }))
1707        })
1708    }
1709
1710    fn write_file(
1711        &self,
1712        path: impl Into<Arc<Path>>,
1713        text: Rope,
1714        line_ending: LineEnding,
1715        cx: &Context<Worktree>,
1716    ) -> Task<Result<Arc<File>>> {
1717        let path = path.into();
1718        let fs = self.fs.clone();
1719        let is_private = self.is_path_private(&path);
1720        let Ok(abs_path) = self.absolutize(&path) else {
1721            return Task::ready(Err(anyhow!("invalid path {path:?}")));
1722        };
1723
1724        let write = cx.background_executor().spawn({
1725            let fs = fs.clone();
1726            let abs_path = abs_path.clone();
1727            async move { fs.save(&abs_path, &text, line_ending).await }
1728        });
1729
1730        cx.spawn(move |this, mut cx| async move {
1731            write.await?;
1732            let entry = this
1733                .update(&mut cx, |this, cx| {
1734                    this.as_local_mut()
1735                        .unwrap()
1736                        .refresh_entry(path.clone(), None, cx)
1737                })?
1738                .await?;
1739            let worktree = this.upgrade().ok_or_else(|| anyhow!("worktree dropped"))?;
1740            if let Some(entry) = entry {
1741                Ok(File::for_entry(entry, worktree))
1742            } else {
1743                let metadata = fs
1744                    .metadata(&abs_path)
1745                    .await
1746                    .with_context(|| {
1747                        format!("Fetching metadata after saving the excluded buffer {abs_path:?}")
1748                    })?
1749                    .with_context(|| {
1750                        format!("Excluded buffer {path:?} got removed during saving")
1751                    })?;
1752                Ok(Arc::new(File {
1753                    worktree,
1754                    path,
1755                    disk_state: DiskState::Present {
1756                        mtime: metadata.mtime,
1757                    },
1758                    entry_id: None,
1759                    is_local: true,
1760                    is_private,
1761                }))
1762            }
1763        })
1764    }
1765
1766    fn delete_entry(
1767        &self,
1768        entry_id: ProjectEntryId,
1769        trash: bool,
1770        cx: &Context<Worktree>,
1771    ) -> Option<Task<Result<()>>> {
1772        let entry = self.entry_for_id(entry_id)?.clone();
1773        let abs_path = self.absolutize(&entry.path);
1774        let fs = self.fs.clone();
1775
1776        let delete = cx.background_executor().spawn(async move {
1777            if entry.is_file() {
1778                if trash {
1779                    fs.trash_file(&abs_path?, Default::default()).await?;
1780                } else {
1781                    fs.remove_file(&abs_path?, Default::default()).await?;
1782                }
1783            } else if trash {
1784                fs.trash_dir(
1785                    &abs_path?,
1786                    RemoveOptions {
1787                        recursive: true,
1788                        ignore_if_not_exists: false,
1789                    },
1790                )
1791                .await?;
1792            } else {
1793                fs.remove_dir(
1794                    &abs_path?,
1795                    RemoveOptions {
1796                        recursive: true,
1797                        ignore_if_not_exists: false,
1798                    },
1799                )
1800                .await?;
1801            }
1802            anyhow::Ok(entry.path)
1803        });
1804
1805        Some(cx.spawn(|this, mut cx| async move {
1806            let path = delete.await?;
1807            this.update(&mut cx, |this, _| {
1808                this.as_local_mut()
1809                    .unwrap()
1810                    .refresh_entries_for_paths(vec![path])
1811            })?
1812            .recv()
1813            .await;
1814            Ok(())
1815        }))
1816    }
1817
1818    fn rename_entry(
1819        &self,
1820        entry_id: ProjectEntryId,
1821        new_path: impl Into<Arc<Path>>,
1822        cx: &Context<Worktree>,
1823    ) -> Task<Result<CreatedEntry>> {
1824        let old_path = match self.entry_for_id(entry_id) {
1825            Some(entry) => entry.path.clone(),
1826            None => return Task::ready(Err(anyhow!("no entry to rename for id {entry_id:?}"))),
1827        };
1828        let new_path = new_path.into();
1829        let abs_old_path = self.absolutize(&old_path);
1830        let Ok(abs_new_path) = self.absolutize(&new_path) else {
1831            return Task::ready(Err(anyhow!("absolutizing path {new_path:?}")));
1832        };
1833        let abs_path = abs_new_path.clone();
1834        let fs = self.fs.clone();
1835        let case_sensitive = self.fs_case_sensitive;
1836        let rename = cx.background_executor().spawn(async move {
1837            let abs_old_path = abs_old_path?;
1838            let abs_new_path = abs_new_path;
1839
1840            let abs_old_path_lower = abs_old_path.to_str().map(|p| p.to_lowercase());
1841            let abs_new_path_lower = abs_new_path.to_str().map(|p| p.to_lowercase());
1842
1843            // If we're on a case-insensitive FS and we're doing a case-only rename (i.e. `foobar` to `FOOBAR`)
1844            // we want to overwrite, because otherwise we run into a file-already-exists error.
1845            let overwrite = !case_sensitive
1846                && abs_old_path != abs_new_path
1847                && abs_old_path_lower == abs_new_path_lower;
1848
1849            fs.rename(
1850                &abs_old_path,
1851                &abs_new_path,
1852                fs::RenameOptions {
1853                    overwrite,
1854                    ..Default::default()
1855                },
1856            )
1857            .await
1858            .with_context(|| format!("Renaming {abs_old_path:?} into {abs_new_path:?}"))
1859        });
1860
1861        cx.spawn(|this, mut cx| async move {
1862            rename.await?;
1863            Ok(this
1864                .update(&mut cx, |this, cx| {
1865                    this.as_local_mut()
1866                        .unwrap()
1867                        .refresh_entry(new_path.clone(), Some(old_path), cx)
1868                })?
1869                .await?
1870                .map(CreatedEntry::Included)
1871                .unwrap_or_else(|| CreatedEntry::Excluded { abs_path }))
1872        })
1873    }
1874
1875    fn copy_entry(
1876        &self,
1877        entry_id: ProjectEntryId,
1878        relative_worktree_source_path: Option<PathBuf>,
1879        new_path: impl Into<Arc<Path>>,
1880        cx: &Context<Worktree>,
1881    ) -> Task<Result<Option<Entry>>> {
1882        let old_path = match self.entry_for_id(entry_id) {
1883            Some(entry) => entry.path.clone(),
1884            None => return Task::ready(Ok(None)),
1885        };
1886        let new_path = new_path.into();
1887        let abs_old_path =
1888            if let Some(relative_worktree_source_path) = relative_worktree_source_path {
1889                Ok(self.abs_path().join(relative_worktree_source_path))
1890            } else {
1891                self.absolutize(&old_path)
1892            };
1893        let abs_new_path = self.absolutize(&new_path);
1894        let fs = self.fs.clone();
1895        let copy = cx.background_executor().spawn(async move {
1896            copy_recursive(
1897                fs.as_ref(),
1898                &abs_old_path?,
1899                &abs_new_path?,
1900                Default::default(),
1901            )
1902            .await
1903        });
1904
1905        cx.spawn(|this, mut cx| async move {
1906            copy.await?;
1907            this.update(&mut cx, |this, cx| {
1908                this.as_local_mut()
1909                    .unwrap()
1910                    .refresh_entry(new_path.clone(), None, cx)
1911            })?
1912            .await
1913        })
1914    }
1915
1916    pub fn copy_external_entries(
1917        &self,
1918        target_directory: PathBuf,
1919        paths: Vec<Arc<Path>>,
1920        overwrite_existing_files: bool,
1921        cx: &Context<Worktree>,
1922    ) -> Task<Result<Vec<ProjectEntryId>>> {
1923        let worktree_path = self.abs_path().clone();
1924        let fs = self.fs.clone();
1925        let paths = paths
1926            .into_iter()
1927            .filter_map(|source| {
1928                let file_name = source.file_name()?;
1929                let mut target = target_directory.clone();
1930                target.push(file_name);
1931
1932                // Do not allow copying the same file to itself.
1933                if source.as_ref() != target.as_path() {
1934                    Some((source, target))
1935                } else {
1936                    None
1937                }
1938            })
1939            .collect::<Vec<_>>();
1940
1941        let paths_to_refresh = paths
1942            .iter()
1943            .filter_map(|(_, target)| Some(target.strip_prefix(&worktree_path).ok()?.into()))
1944            .collect::<Vec<_>>();
1945
1946        cx.spawn(|this, cx| async move {
1947            cx.background_executor()
1948                .spawn(async move {
1949                    for (source, target) in paths {
1950                        copy_recursive(
1951                            fs.as_ref(),
1952                            &source,
1953                            &target,
1954                            fs::CopyOptions {
1955                                overwrite: overwrite_existing_files,
1956                                ..Default::default()
1957                            },
1958                        )
1959                        .await
1960                        .with_context(|| {
1961                            anyhow!("Failed to copy file from {source:?} to {target:?}")
1962                        })?;
1963                    }
1964                    Ok::<(), anyhow::Error>(())
1965                })
1966                .await
1967                .log_err();
1968            let mut refresh = cx.read_entity(
1969                &this.upgrade().with_context(|| "Dropped worktree")?,
1970                |this, _| {
1971                    Ok::<postage::barrier::Receiver, anyhow::Error>(
1972                        this.as_local()
1973                            .with_context(|| "Worktree is not local")?
1974                            .refresh_entries_for_paths(paths_to_refresh.clone()),
1975                    )
1976                },
1977            )??;
1978
1979            cx.background_executor()
1980                .spawn(async move {
1981                    refresh.next().await;
1982                    Ok::<(), anyhow::Error>(())
1983                })
1984                .await
1985                .log_err();
1986
1987            let this = this.upgrade().with_context(|| "Dropped worktree")?;
1988            cx.read_entity(&this, |this, _| {
1989                paths_to_refresh
1990                    .iter()
1991                    .filter_map(|path| Some(this.entry_for_path(path)?.id))
1992                    .collect()
1993            })
1994        })
1995    }
1996
1997    fn expand_entry(
1998        &self,
1999        entry_id: ProjectEntryId,
2000        cx: &Context<Worktree>,
2001    ) -> Option<Task<Result<()>>> {
2002        let path = self.entry_for_id(entry_id)?.path.clone();
2003        let mut refresh = self.refresh_entries_for_paths(vec![path]);
2004        Some(cx.background_executor().spawn(async move {
2005            refresh.next().await;
2006            Ok(())
2007        }))
2008    }
2009
2010    fn expand_all_for_entry(
2011        &self,
2012        entry_id: ProjectEntryId,
2013        cx: &Context<Worktree>,
2014    ) -> Option<Task<Result<()>>> {
2015        let path = self.entry_for_id(entry_id).unwrap().path.clone();
2016        let mut rx = self.add_path_prefix_to_scan(path.clone());
2017        Some(cx.background_executor().spawn(async move {
2018            rx.next().await;
2019            Ok(())
2020        }))
2021    }
2022
2023    fn refresh_entries_for_paths(&self, paths: Vec<Arc<Path>>) -> barrier::Receiver {
2024        let (tx, rx) = barrier::channel();
2025        self.scan_requests_tx
2026            .try_send(ScanRequest {
2027                relative_paths: paths,
2028                done: smallvec![tx],
2029            })
2030            .ok();
2031        rx
2032    }
2033
2034    pub fn add_path_prefix_to_scan(&self, path_prefix: Arc<Path>) -> barrier::Receiver {
2035        let (tx, rx) = barrier::channel();
2036        self.path_prefixes_to_scan_tx
2037            .try_send(PathPrefixScanRequest {
2038                path: path_prefix,
2039                done: smallvec![tx],
2040            })
2041            .ok();
2042        rx
2043    }
2044
2045    fn refresh_entry(
2046        &self,
2047        path: Arc<Path>,
2048        old_path: Option<Arc<Path>>,
2049        cx: &Context<Worktree>,
2050    ) -> Task<Result<Option<Entry>>> {
2051        if self.settings.is_path_excluded(&path) {
2052            return Task::ready(Ok(None));
2053        }
2054        let paths = if let Some(old_path) = old_path.as_ref() {
2055            vec![old_path.clone(), path.clone()]
2056        } else {
2057            vec![path.clone()]
2058        };
2059        let t0 = Instant::now();
2060        let mut refresh = self.refresh_entries_for_paths(paths);
2061        cx.spawn(move |this, mut cx| async move {
2062            refresh.recv().await;
2063            log::trace!("refreshed entry {path:?} in {:?}", t0.elapsed());
2064            let new_entry = this.update(&mut cx, |this, _| {
2065                this.entry_for_path(path)
2066                    .cloned()
2067                    .ok_or_else(|| anyhow!("failed to read path after update"))
2068            })??;
2069            Ok(Some(new_entry))
2070        })
2071    }
2072
2073    fn observe_updates<F, Fut>(&mut self, project_id: u64, cx: &Context<Worktree>, callback: F)
2074    where
2075        F: 'static + Send + Fn(proto::UpdateWorktree) -> Fut,
2076        Fut: Send + Future<Output = bool>,
2077    {
2078        if let Some(observer) = self.update_observer.as_mut() {
2079            *observer.resume_updates.borrow_mut() = ();
2080            return;
2081        }
2082
2083        let (resume_updates_tx, mut resume_updates_rx) = watch::channel::<()>();
2084        let (snapshots_tx, mut snapshots_rx) =
2085            mpsc::unbounded::<(LocalSnapshot, UpdatedEntriesSet, UpdatedGitRepositoriesSet)>();
2086        snapshots_tx
2087            .unbounded_send((self.snapshot(), Arc::default(), Arc::default()))
2088            .ok();
2089
2090        let worktree_id = cx.entity_id().as_u64();
2091        let _maintain_remote_snapshot = cx.background_executor().spawn(async move {
2092            let mut is_first = true;
2093            while let Some((snapshot, entry_changes, repo_changes)) = snapshots_rx.next().await {
2094                let update;
2095                if is_first {
2096                    update = snapshot.build_initial_update(project_id, worktree_id);
2097                    is_first = false;
2098                } else {
2099                    update =
2100                        snapshot.build_update(project_id, worktree_id, entry_changes, repo_changes);
2101                }
2102
2103                for update in proto::split_worktree_update(update) {
2104                    let _ = resume_updates_rx.try_recv();
2105                    loop {
2106                        let result = callback(update.clone());
2107                        if result.await {
2108                            break;
2109                        } else {
2110                            log::info!("waiting to resume updates");
2111                            if resume_updates_rx.next().await.is_none() {
2112                                return Some(());
2113                            }
2114                        }
2115                    }
2116                }
2117            }
2118            Some(())
2119        });
2120
2121        self.update_observer = Some(UpdateObservationState {
2122            snapshots_tx,
2123            resume_updates: resume_updates_tx,
2124            _maintain_remote_snapshot,
2125        });
2126    }
2127
2128    pub fn share_private_files(&mut self, cx: &Context<Worktree>) {
2129        self.share_private_files = true;
2130        self.restart_background_scanners(cx);
2131    }
2132}
2133
2134impl RemoteWorktree {
2135    pub fn project_id(&self) -> u64 {
2136        self.project_id
2137    }
2138
2139    pub fn client(&self) -> AnyProtoClient {
2140        self.client.clone()
2141    }
2142
2143    pub fn disconnected_from_host(&mut self) {
2144        self.updates_tx.take();
2145        self.snapshot_subscriptions.clear();
2146        self.disconnected = true;
2147    }
2148
2149    pub fn update_from_remote(&self, update: proto::UpdateWorktree) {
2150        if let Some(updates_tx) = &self.updates_tx {
2151            updates_tx
2152                .unbounded_send(update)
2153                .expect("consumer runs to completion");
2154        }
2155    }
2156
2157    fn observe_updates<F, Fut>(&mut self, project_id: u64, cx: &Context<Worktree>, callback: F)
2158    where
2159        F: 'static + Send + Fn(proto::UpdateWorktree) -> Fut,
2160        Fut: 'static + Send + Future<Output = bool>,
2161    {
2162        let (tx, mut rx) = mpsc::unbounded();
2163        let initial_update = self
2164            .snapshot
2165            .build_initial_update(project_id, self.id().to_proto());
2166        self.update_observer = Some(tx);
2167        cx.spawn(|this, mut cx| async move {
2168            let mut update = initial_update;
2169            'outer: loop {
2170                // SSH projects use a special project ID of 0, and we need to
2171                // remap it to the correct one here.
2172                update.project_id = project_id;
2173
2174                for chunk in split_worktree_update(update) {
2175                    if !callback(chunk).await {
2176                        break 'outer;
2177                    }
2178                }
2179
2180                if let Some(next_update) = rx.next().await {
2181                    update = next_update;
2182                } else {
2183                    break;
2184                }
2185            }
2186            this.update(&mut cx, |this, _| {
2187                let this = this.as_remote_mut().unwrap();
2188                this.update_observer.take();
2189            })
2190        })
2191        .detach();
2192    }
2193
2194    fn observed_snapshot(&self, scan_id: usize) -> bool {
2195        self.completed_scan_id >= scan_id
2196    }
2197
2198    pub fn wait_for_snapshot(&mut self, scan_id: usize) -> impl Future<Output = Result<()>> {
2199        let (tx, rx) = oneshot::channel();
2200        if self.observed_snapshot(scan_id) {
2201            let _ = tx.send(());
2202        } else if self.disconnected {
2203            drop(tx);
2204        } else {
2205            match self
2206                .snapshot_subscriptions
2207                .binary_search_by_key(&scan_id, |probe| probe.0)
2208            {
2209                Ok(ix) | Err(ix) => self.snapshot_subscriptions.insert(ix, (scan_id, tx)),
2210            }
2211        }
2212
2213        async move {
2214            rx.await?;
2215            Ok(())
2216        }
2217    }
2218
2219    fn insert_entry(
2220        &mut self,
2221        entry: proto::Entry,
2222        scan_id: usize,
2223        cx: &Context<Worktree>,
2224    ) -> Task<Result<Entry>> {
2225        let wait_for_snapshot = self.wait_for_snapshot(scan_id);
2226        cx.spawn(|this, mut cx| async move {
2227            wait_for_snapshot.await?;
2228            this.update(&mut cx, |worktree, _| {
2229                let worktree = worktree.as_remote_mut().unwrap();
2230                let snapshot = &mut worktree.background_snapshot.lock().0;
2231                let entry = snapshot.insert_entry(entry, &worktree.file_scan_inclusions);
2232                worktree.snapshot = snapshot.clone();
2233                entry
2234            })?
2235        })
2236    }
2237
2238    fn delete_entry(
2239        &self,
2240        entry_id: ProjectEntryId,
2241        trash: bool,
2242        cx: &Context<Worktree>,
2243    ) -> Option<Task<Result<()>>> {
2244        let response = self.client.request(proto::DeleteProjectEntry {
2245            project_id: self.project_id,
2246            entry_id: entry_id.to_proto(),
2247            use_trash: trash,
2248        });
2249        Some(cx.spawn(move |this, mut cx| async move {
2250            let response = response.await?;
2251            let scan_id = response.worktree_scan_id as usize;
2252
2253            this.update(&mut cx, move |this, _| {
2254                this.as_remote_mut().unwrap().wait_for_snapshot(scan_id)
2255            })?
2256            .await?;
2257
2258            this.update(&mut cx, |this, _| {
2259                let this = this.as_remote_mut().unwrap();
2260                let snapshot = &mut this.background_snapshot.lock().0;
2261                snapshot.delete_entry(entry_id);
2262                this.snapshot = snapshot.clone();
2263            })
2264        }))
2265    }
2266
2267    fn rename_entry(
2268        &self,
2269        entry_id: ProjectEntryId,
2270        new_path: impl Into<Arc<Path>>,
2271        cx: &Context<Worktree>,
2272    ) -> Task<Result<CreatedEntry>> {
2273        let new_path = new_path.into();
2274        let response = self.client.request(proto::RenameProjectEntry {
2275            project_id: self.project_id,
2276            entry_id: entry_id.to_proto(),
2277            new_path: new_path.to_string_lossy().into(),
2278        });
2279        cx.spawn(move |this, mut cx| async move {
2280            let response = response.await?;
2281            match response.entry {
2282                Some(entry) => this
2283                    .update(&mut cx, |this, cx| {
2284                        this.as_remote_mut().unwrap().insert_entry(
2285                            entry,
2286                            response.worktree_scan_id as usize,
2287                            cx,
2288                        )
2289                    })?
2290                    .await
2291                    .map(CreatedEntry::Included),
2292                None => {
2293                    let abs_path = this.update(&mut cx, |worktree, _| {
2294                        worktree
2295                            .absolutize(&new_path)
2296                            .with_context(|| format!("absolutizing {new_path:?}"))
2297                    })??;
2298                    Ok(CreatedEntry::Excluded { abs_path })
2299                }
2300            }
2301        })
2302    }
2303}
2304
2305impl Snapshot {
2306    pub fn new(id: u64, root_name: String, abs_path: Arc<Path>) -> Self {
2307        Snapshot {
2308            id: WorktreeId::from_usize(id as usize),
2309            abs_path: abs_path.into(),
2310            root_char_bag: root_name.chars().map(|c| c.to_ascii_lowercase()).collect(),
2311            root_name,
2312            always_included_entries: Default::default(),
2313            entries_by_path: Default::default(),
2314            entries_by_id: Default::default(),
2315            repositories: Default::default(),
2316            scan_id: 1,
2317            completed_scan_id: 0,
2318        }
2319    }
2320
2321    pub fn id(&self) -> WorktreeId {
2322        self.id
2323    }
2324
2325    // TODO:
2326    // Consider the following:
2327    //
2328    // ```rust
2329    // let abs_path: Arc<Path> = snapshot.abs_path(); // e.g. "C:\Users\user\Desktop\project"
2330    // let some_non_trimmed_path = Path::new("\\\\?\\C:\\Users\\user\\Desktop\\project\\main.rs");
2331    // // The caller perform some actions here:
2332    // some_non_trimmed_path.strip_prefix(abs_path);  // This fails
2333    // some_non_trimmed_path.starts_with(abs_path);   // This fails too
2334    // ```
2335    //
2336    // This is definitely a bug, but it's not clear if we should handle it here or not.
2337    pub fn abs_path(&self) -> &Arc<Path> {
2338        self.abs_path.as_path()
2339    }
2340
2341    fn build_initial_update(&self, project_id: u64, worktree_id: u64) -> proto::UpdateWorktree {
2342        let mut updated_entries = self
2343            .entries_by_path
2344            .iter()
2345            .map(proto::Entry::from)
2346            .collect::<Vec<_>>();
2347        updated_entries.sort_unstable_by_key(|e| e.id);
2348
2349        let mut updated_repositories = self
2350            .repositories
2351            .iter()
2352            .map(|repository| repository.initial_update())
2353            .collect::<Vec<_>>();
2354        updated_repositories.sort_unstable_by_key(|e| e.work_directory_id);
2355
2356        proto::UpdateWorktree {
2357            project_id,
2358            worktree_id,
2359            abs_path: self.abs_path().to_string_lossy().into(),
2360            root_name: self.root_name().to_string(),
2361            updated_entries,
2362            removed_entries: Vec::new(),
2363            scan_id: self.scan_id as u64,
2364            is_last_update: self.completed_scan_id == self.scan_id,
2365            updated_repositories,
2366            removed_repositories: Vec::new(),
2367        }
2368    }
2369
2370    pub fn absolutize(&self, path: &Path) -> Result<PathBuf> {
2371        if path
2372            .components()
2373            .any(|component| !matches!(component, std::path::Component::Normal(_)))
2374        {
2375            return Err(anyhow!("invalid path"));
2376        }
2377        if path.file_name().is_some() {
2378            Ok(self.abs_path.as_path().join(path))
2379        } else {
2380            Ok(self.abs_path.as_path().to_path_buf())
2381        }
2382    }
2383
2384    pub fn contains_entry(&self, entry_id: ProjectEntryId) -> bool {
2385        self.entries_by_id.get(&entry_id, &()).is_some()
2386    }
2387
2388    fn insert_entry(
2389        &mut self,
2390        entry: proto::Entry,
2391        always_included_paths: &PathMatcher,
2392    ) -> Result<Entry> {
2393        let entry = Entry::try_from((&self.root_char_bag, always_included_paths, entry))?;
2394        let old_entry = self.entries_by_id.insert_or_replace(
2395            PathEntry {
2396                id: entry.id,
2397                path: entry.path.clone(),
2398                is_ignored: entry.is_ignored,
2399                scan_id: 0,
2400            },
2401            &(),
2402        );
2403        if let Some(old_entry) = old_entry {
2404            self.entries_by_path.remove(&PathKey(old_entry.path), &());
2405        }
2406        self.entries_by_path.insert_or_replace(entry.clone(), &());
2407        Ok(entry)
2408    }
2409
2410    fn delete_entry(&mut self, entry_id: ProjectEntryId) -> Option<Arc<Path>> {
2411        let removed_entry = self.entries_by_id.remove(&entry_id, &())?;
2412        self.entries_by_path = {
2413            let mut cursor = self.entries_by_path.cursor::<TraversalProgress>(&());
2414            let mut new_entries_by_path =
2415                cursor.slice(&TraversalTarget::path(&removed_entry.path), Bias::Left, &());
2416            while let Some(entry) = cursor.item() {
2417                if entry.path.starts_with(&removed_entry.path) {
2418                    self.entries_by_id.remove(&entry.id, &());
2419                    cursor.next(&());
2420                } else {
2421                    break;
2422                }
2423            }
2424            new_entries_by_path.append(cursor.suffix(&()), &());
2425            new_entries_by_path
2426        };
2427
2428        Some(removed_entry.path)
2429    }
2430
2431    pub fn status_for_file(&self, path: impl AsRef<Path>) -> Option<FileStatus> {
2432        let path = path.as_ref();
2433        self.repository_for_path(path).and_then(|repo| {
2434            let repo_path = repo.relativize(path).unwrap();
2435            repo.statuses_by_path
2436                .get(&PathKey(repo_path.0), &())
2437                .map(|entry| entry.status)
2438        })
2439    }
2440
2441    fn update_abs_path(&mut self, abs_path: SanitizedPath, root_name: String) {
2442        self.abs_path = abs_path;
2443        if root_name != self.root_name {
2444            self.root_char_bag = root_name.chars().map(|c| c.to_ascii_lowercase()).collect();
2445            self.root_name = root_name;
2446        }
2447    }
2448
2449    pub(crate) fn apply_remote_update(
2450        &mut self,
2451        mut update: proto::UpdateWorktree,
2452        always_included_paths: &PathMatcher,
2453    ) -> Result<()> {
2454        log::trace!(
2455            "applying remote worktree update. {} entries updated, {} removed",
2456            update.updated_entries.len(),
2457            update.removed_entries.len()
2458        );
2459        self.update_abs_path(
2460            SanitizedPath::from(PathBuf::from(update.abs_path)),
2461            update.root_name,
2462        );
2463
2464        let mut entries_by_path_edits = Vec::new();
2465        let mut entries_by_id_edits = Vec::new();
2466
2467        for entry_id in update.removed_entries {
2468            let entry_id = ProjectEntryId::from_proto(entry_id);
2469            entries_by_id_edits.push(Edit::Remove(entry_id));
2470            if let Some(entry) = self.entry_for_id(entry_id) {
2471                entries_by_path_edits.push(Edit::Remove(PathKey(entry.path.clone())));
2472            }
2473        }
2474
2475        for entry in update.updated_entries {
2476            let entry = Entry::try_from((&self.root_char_bag, always_included_paths, entry))?;
2477            if let Some(PathEntry { path, .. }) = self.entries_by_id.get(&entry.id, &()) {
2478                entries_by_path_edits.push(Edit::Remove(PathKey(path.clone())));
2479            }
2480            if let Some(old_entry) = self.entries_by_path.get(&PathKey(entry.path.clone()), &()) {
2481                if old_entry.id != entry.id {
2482                    entries_by_id_edits.push(Edit::Remove(old_entry.id));
2483                }
2484            }
2485            entries_by_id_edits.push(Edit::Insert(PathEntry {
2486                id: entry.id,
2487                path: entry.path.clone(),
2488                is_ignored: entry.is_ignored,
2489                scan_id: 0,
2490            }));
2491            entries_by_path_edits.push(Edit::Insert(entry));
2492        }
2493
2494        self.entries_by_path.edit(entries_by_path_edits, &());
2495        self.entries_by_id.edit(entries_by_id_edits, &());
2496
2497        update.removed_repositories.sort_unstable();
2498        self.repositories.retain(&(), |entry: &RepositoryEntry| {
2499            update
2500                .removed_repositories
2501                .binary_search(&entry.work_directory_id.to_proto())
2502                .is_err()
2503        });
2504
2505        for repository in update.updated_repositories {
2506            let work_directory_id = ProjectEntryId::from_proto(repository.work_directory_id);
2507            if let Some(work_dir_entry) = self.entry_for_id(work_directory_id) {
2508                if self
2509                    .repositories
2510                    .contains(&PathKey(work_dir_entry.path.clone()), &())
2511                {
2512                    let edits = repository
2513                        .removed_statuses
2514                        .into_iter()
2515                        .map(|path| Edit::Remove(PathKey(Path::new(&path).into())))
2516                        .chain(repository.updated_statuses.into_iter().filter_map(
2517                            |updated_status| {
2518                                Some(Edit::Insert(updated_status.try_into().log_err()?))
2519                            },
2520                        ))
2521                        .collect::<Vec<_>>();
2522
2523                    self.repositories
2524                        .update(&PathKey(work_dir_entry.path.clone()), &(), |repo| {
2525                            repo.branch = repository.branch.map(Into::into);
2526                            repo.statuses_by_path.edit(edits, &());
2527                        });
2528                } else {
2529                    let statuses = SumTree::from_iter(
2530                        repository
2531                            .updated_statuses
2532                            .into_iter()
2533                            .filter_map(|updated_status| updated_status.try_into().log_err()),
2534                        &(),
2535                    );
2536
2537                    self.repositories.insert_or_replace(
2538                        RepositoryEntry {
2539                            work_directory_id,
2540                            work_directory: WorkDirectory {
2541                                path: work_dir_entry.path.clone(),
2542                                // When syncing repository entries from a peer, we don't need
2543                                // the location_in_repo field, since git operations don't happen locally
2544                                // anyway.
2545                                location_in_repo: None,
2546                            },
2547                            branch: repository.branch.map(Into::into),
2548                            statuses_by_path: statuses,
2549                        },
2550                        &(),
2551                    );
2552                }
2553            } else {
2554                log::error!(
2555                    "no work directory entry for repository {:?}",
2556                    repository.work_directory_id
2557                )
2558            }
2559        }
2560
2561        self.scan_id = update.scan_id as usize;
2562        if update.is_last_update {
2563            self.completed_scan_id = update.scan_id as usize;
2564        }
2565
2566        Ok(())
2567    }
2568
2569    pub fn entry_count(&self) -> usize {
2570        self.entries_by_path.summary().count
2571    }
2572
2573    pub fn visible_entry_count(&self) -> usize {
2574        self.entries_by_path.summary().non_ignored_count
2575    }
2576
2577    pub fn dir_count(&self) -> usize {
2578        let summary = self.entries_by_path.summary();
2579        summary.count - summary.file_count
2580    }
2581
2582    pub fn visible_dir_count(&self) -> usize {
2583        let summary = self.entries_by_path.summary();
2584        summary.non_ignored_count - summary.non_ignored_file_count
2585    }
2586
2587    pub fn file_count(&self) -> usize {
2588        self.entries_by_path.summary().file_count
2589    }
2590
2591    pub fn visible_file_count(&self) -> usize {
2592        self.entries_by_path.summary().non_ignored_file_count
2593    }
2594
2595    fn traverse_from_offset(
2596        &self,
2597        include_files: bool,
2598        include_dirs: bool,
2599        include_ignored: bool,
2600        start_offset: usize,
2601    ) -> Traversal {
2602        let mut cursor = self.entries_by_path.cursor(&());
2603        cursor.seek(
2604            &TraversalTarget::Count {
2605                count: start_offset,
2606                include_files,
2607                include_dirs,
2608                include_ignored,
2609            },
2610            Bias::Right,
2611            &(),
2612        );
2613        Traversal {
2614            snapshot: self,
2615            cursor,
2616            include_files,
2617            include_dirs,
2618            include_ignored,
2619        }
2620    }
2621
2622    pub fn traverse_from_path(
2623        &self,
2624        include_files: bool,
2625        include_dirs: bool,
2626        include_ignored: bool,
2627        path: &Path,
2628    ) -> Traversal {
2629        Traversal::new(self, include_files, include_dirs, include_ignored, path)
2630    }
2631
2632    pub fn files(&self, include_ignored: bool, start: usize) -> Traversal {
2633        self.traverse_from_offset(true, false, include_ignored, start)
2634    }
2635
2636    pub fn directories(&self, include_ignored: bool, start: usize) -> Traversal {
2637        self.traverse_from_offset(false, true, include_ignored, start)
2638    }
2639
2640    pub fn entries(&self, include_ignored: bool, start: usize) -> Traversal {
2641        self.traverse_from_offset(true, true, include_ignored, start)
2642    }
2643
2644    #[cfg(any(feature = "test-support", test))]
2645    pub fn git_status(&self, work_dir: &Path) -> Option<Vec<StatusEntry>> {
2646        self.repositories
2647            .get(&PathKey(work_dir.into()), &())
2648            .map(|repo| repo.status().collect())
2649    }
2650
2651    pub fn repositories(&self) -> &SumTree<RepositoryEntry> {
2652        &self.repositories
2653    }
2654
2655    pub fn repositories_with_abs_paths(
2656        &self,
2657    ) -> impl '_ + Iterator<Item = (&RepositoryEntry, PathBuf)> {
2658        let base = self.abs_path();
2659        self.repositories.iter().map(|repo| {
2660            let path = repo.work_directory.location_in_repo.as_deref();
2661            let path = path.unwrap_or(repo.work_directory.as_ref());
2662            (repo, base.join(path))
2663        })
2664    }
2665
2666    /// Get the repository whose work directory corresponds to the given path.
2667    pub(crate) fn repository(&self, work_directory: PathKey) -> Option<RepositoryEntry> {
2668        self.repositories.get(&work_directory, &()).cloned()
2669    }
2670
2671    /// Get the repository whose work directory contains the given path.
2672    pub fn repository_for_path(&self, path: &Path) -> Option<&RepositoryEntry> {
2673        let mut cursor = self.repositories.cursor::<PathProgress>(&());
2674        let mut repository = None;
2675
2676        // Git repositories may contain other git repositories. As a side effect of
2677        // lexicographic sorting by path, deeper repositories will be after higher repositories
2678        // So, let's loop through every matching repository until we can't find any more to find
2679        // the deepest repository that could contain this path.
2680        while cursor.seek_forward(&PathTarget::Contains(path), Bias::Left, &())
2681            && cursor.item().is_some()
2682        {
2683            repository = cursor.item();
2684            cursor.next(&());
2685        }
2686
2687        repository
2688    }
2689
2690    /// Given an ordered iterator of entries, returns an iterator of those entries,
2691    /// along with their containing git repository.
2692    pub fn entries_with_repositories<'a>(
2693        &'a self,
2694        entries: impl 'a + Iterator<Item = &'a Entry>,
2695    ) -> impl 'a + Iterator<Item = (&'a Entry, Option<&'a RepositoryEntry>)> {
2696        let mut containing_repos = Vec::<&RepositoryEntry>::new();
2697        let mut repositories = self.repositories().iter().peekable();
2698        entries.map(move |entry| {
2699            while let Some(repository) = containing_repos.last() {
2700                if repository.directory_contains(&entry.path) {
2701                    break;
2702                } else {
2703                    containing_repos.pop();
2704                }
2705            }
2706            while let Some(repository) = repositories.peek() {
2707                if repository.directory_contains(&entry.path) {
2708                    containing_repos.push(repositories.next().unwrap());
2709                } else {
2710                    break;
2711                }
2712            }
2713            let repo = containing_repos.last().copied();
2714            (entry, repo)
2715        })
2716    }
2717
2718    pub fn paths(&self) -> impl Iterator<Item = &Arc<Path>> {
2719        let empty_path = Path::new("");
2720        self.entries_by_path
2721            .cursor::<()>(&())
2722            .filter(move |entry| entry.path.as_ref() != empty_path)
2723            .map(|entry| &entry.path)
2724    }
2725
2726    pub fn child_entries<'a>(&'a self, parent_path: &'a Path) -> ChildEntriesIter<'a> {
2727        let options = ChildEntriesOptions {
2728            include_files: true,
2729            include_dirs: true,
2730            include_ignored: true,
2731        };
2732        self.child_entries_with_options(parent_path, options)
2733    }
2734
2735    pub fn child_entries_with_options<'a>(
2736        &'a self,
2737        parent_path: &'a Path,
2738        options: ChildEntriesOptions,
2739    ) -> ChildEntriesIter<'a> {
2740        let mut cursor = self.entries_by_path.cursor(&());
2741        cursor.seek(&TraversalTarget::path(parent_path), Bias::Right, &());
2742        let traversal = Traversal {
2743            snapshot: self,
2744            cursor,
2745            include_files: options.include_files,
2746            include_dirs: options.include_dirs,
2747            include_ignored: options.include_ignored,
2748        };
2749        ChildEntriesIter {
2750            traversal,
2751            parent_path,
2752        }
2753    }
2754
2755    pub fn root_entry(&self) -> Option<&Entry> {
2756        self.entry_for_path("")
2757    }
2758
2759    pub fn root_dir(&self) -> Option<Arc<Path>> {
2760        self.root_entry()
2761            .filter(|entry| entry.is_dir())
2762            .map(|_| self.abs_path().clone())
2763    }
2764
2765    pub fn root_name(&self) -> &str {
2766        &self.root_name
2767    }
2768
2769    pub fn root_git_entry(&self) -> Option<RepositoryEntry> {
2770        self.repositories
2771            .get(&PathKey(Path::new("").into()), &())
2772            .map(|entry| entry.to_owned())
2773    }
2774
2775    pub fn git_entry(&self, work_directory_path: Arc<Path>) -> Option<RepositoryEntry> {
2776        self.repositories
2777            .get(&PathKey(work_directory_path), &())
2778            .map(|entry| entry.to_owned())
2779    }
2780
2781    pub fn git_entries(&self) -> impl Iterator<Item = &RepositoryEntry> {
2782        self.repositories.iter()
2783    }
2784
2785    pub fn scan_id(&self) -> usize {
2786        self.scan_id
2787    }
2788
2789    pub fn entry_for_path(&self, path: impl AsRef<Path>) -> Option<&Entry> {
2790        let path = path.as_ref();
2791        self.traverse_from_path(true, true, true, path)
2792            .entry()
2793            .and_then(|entry| {
2794                if entry.path.as_ref() == path {
2795                    Some(entry)
2796                } else {
2797                    None
2798                }
2799            })
2800    }
2801
2802    pub fn entry_for_id(&self, id: ProjectEntryId) -> Option<&Entry> {
2803        let entry = self.entries_by_id.get(&id, &())?;
2804        self.entry_for_path(&entry.path)
2805    }
2806
2807    pub fn inode_for_path(&self, path: impl AsRef<Path>) -> Option<u64> {
2808        self.entry_for_path(path.as_ref()).map(|e| e.inode)
2809    }
2810}
2811
2812impl LocalSnapshot {
2813    pub fn local_repo_for_path(&self, path: &Path) -> Option<&LocalRepositoryEntry> {
2814        let repository_entry = self.repository_for_path(path)?;
2815        let work_directory_id = repository_entry.work_directory_id();
2816        self.git_repositories.get(&work_directory_id)
2817    }
2818
2819    fn build_update(
2820        &self,
2821        project_id: u64,
2822        worktree_id: u64,
2823        entry_changes: UpdatedEntriesSet,
2824        repo_changes: UpdatedGitRepositoriesSet,
2825    ) -> proto::UpdateWorktree {
2826        let mut updated_entries = Vec::new();
2827        let mut removed_entries = Vec::new();
2828        let mut updated_repositories = Vec::new();
2829        let mut removed_repositories = Vec::new();
2830
2831        for (_, entry_id, path_change) in entry_changes.iter() {
2832            if let PathChange::Removed = path_change {
2833                removed_entries.push(entry_id.0 as u64);
2834            } else if let Some(entry) = self.entry_for_id(*entry_id) {
2835                updated_entries.push(proto::Entry::from(entry));
2836            }
2837        }
2838
2839        for (work_dir_path, change) in repo_changes.iter() {
2840            let new_repo = self.repositories.get(&PathKey(work_dir_path.clone()), &());
2841            match (&change.old_repository, new_repo) {
2842                (Some(old_repo), Some(new_repo)) => {
2843                    updated_repositories.push(new_repo.build_update(old_repo));
2844                }
2845                (None, Some(new_repo)) => {
2846                    updated_repositories.push(new_repo.initial_update());
2847                }
2848                (Some(old_repo), None) => {
2849                    removed_repositories.push(old_repo.work_directory_id.to_proto());
2850                }
2851                _ => {}
2852            }
2853        }
2854
2855        removed_entries.sort_unstable();
2856        updated_entries.sort_unstable_by_key(|e| e.id);
2857        removed_repositories.sort_unstable();
2858        updated_repositories.sort_unstable_by_key(|e| e.work_directory_id);
2859
2860        // TODO - optimize, knowing that removed_entries are sorted.
2861        removed_entries.retain(|id| updated_entries.binary_search_by_key(id, |e| e.id).is_err());
2862
2863        proto::UpdateWorktree {
2864            project_id,
2865            worktree_id,
2866            abs_path: self.abs_path().to_string_lossy().into(),
2867            root_name: self.root_name().to_string(),
2868            updated_entries,
2869            removed_entries,
2870            scan_id: self.scan_id as u64,
2871            is_last_update: self.completed_scan_id == self.scan_id,
2872            updated_repositories,
2873            removed_repositories,
2874        }
2875    }
2876
2877    fn insert_entry(&mut self, mut entry: Entry, fs: &dyn Fs) -> Entry {
2878        if entry.is_file() && entry.path.file_name() == Some(&GITIGNORE) {
2879            let abs_path = self.abs_path.as_path().join(&entry.path);
2880            match smol::block_on(build_gitignore(&abs_path, fs)) {
2881                Ok(ignore) => {
2882                    self.ignores_by_parent_abs_path
2883                        .insert(abs_path.parent().unwrap().into(), (Arc::new(ignore), true));
2884                }
2885                Err(error) => {
2886                    log::error!(
2887                        "error loading .gitignore file {:?} - {:?}",
2888                        &entry.path,
2889                        error
2890                    );
2891                }
2892            }
2893        }
2894
2895        if entry.kind == EntryKind::PendingDir {
2896            if let Some(existing_entry) =
2897                self.entries_by_path.get(&PathKey(entry.path.clone()), &())
2898            {
2899                entry.kind = existing_entry.kind;
2900            }
2901        }
2902
2903        let scan_id = self.scan_id;
2904        let removed = self.entries_by_path.insert_or_replace(entry.clone(), &());
2905        if let Some(removed) = removed {
2906            if removed.id != entry.id {
2907                self.entries_by_id.remove(&removed.id, &());
2908            }
2909        }
2910        self.entries_by_id.insert_or_replace(
2911            PathEntry {
2912                id: entry.id,
2913                path: entry.path.clone(),
2914                is_ignored: entry.is_ignored,
2915                scan_id,
2916            },
2917            &(),
2918        );
2919
2920        entry
2921    }
2922
2923    fn ancestor_inodes_for_path(&self, path: &Path) -> TreeSet<u64> {
2924        let mut inodes = TreeSet::default();
2925        for ancestor in path.ancestors().skip(1) {
2926            if let Some(entry) = self.entry_for_path(ancestor) {
2927                inodes.insert(entry.inode);
2928            }
2929        }
2930        inodes
2931    }
2932
2933    fn ignore_stack_for_abs_path(&self, abs_path: &Path, is_dir: bool) -> Arc<IgnoreStack> {
2934        let mut new_ignores = Vec::new();
2935        for (index, ancestor) in abs_path.ancestors().enumerate() {
2936            if index > 0 {
2937                if let Some((ignore, _)) = self.ignores_by_parent_abs_path.get(ancestor) {
2938                    new_ignores.push((ancestor, Some(ignore.clone())));
2939                } else {
2940                    new_ignores.push((ancestor, None));
2941                }
2942            }
2943            if ancestor.join(*DOT_GIT).exists() {
2944                break;
2945            }
2946        }
2947
2948        let mut ignore_stack = IgnoreStack::none();
2949        for (parent_abs_path, ignore) in new_ignores.into_iter().rev() {
2950            if ignore_stack.is_abs_path_ignored(parent_abs_path, true) {
2951                ignore_stack = IgnoreStack::all();
2952                break;
2953            } else if let Some(ignore) = ignore {
2954                ignore_stack = ignore_stack.append(parent_abs_path.into(), ignore);
2955            }
2956        }
2957
2958        if ignore_stack.is_abs_path_ignored(abs_path, is_dir) {
2959            ignore_stack = IgnoreStack::all();
2960        }
2961
2962        ignore_stack
2963    }
2964
2965    #[cfg(test)]
2966    pub(crate) fn expanded_entries(&self) -> impl Iterator<Item = &Entry> {
2967        self.entries_by_path
2968            .cursor::<()>(&())
2969            .filter(|entry| entry.kind == EntryKind::Dir && (entry.is_external || entry.is_ignored))
2970    }
2971
2972    #[cfg(test)]
2973    pub fn check_invariants(&self, git_state: bool) {
2974        use pretty_assertions::assert_eq;
2975
2976        assert_eq!(
2977            self.entries_by_path
2978                .cursor::<()>(&())
2979                .map(|e| (&e.path, e.id))
2980                .collect::<Vec<_>>(),
2981            self.entries_by_id
2982                .cursor::<()>(&())
2983                .map(|e| (&e.path, e.id))
2984                .collect::<collections::BTreeSet<_>>()
2985                .into_iter()
2986                .collect::<Vec<_>>(),
2987            "entries_by_path and entries_by_id are inconsistent"
2988        );
2989
2990        let mut files = self.files(true, 0);
2991        let mut visible_files = self.files(false, 0);
2992        for entry in self.entries_by_path.cursor::<()>(&()) {
2993            if entry.is_file() {
2994                assert_eq!(files.next().unwrap().inode, entry.inode);
2995                if (!entry.is_ignored && !entry.is_external) || entry.is_always_included {
2996                    assert_eq!(visible_files.next().unwrap().inode, entry.inode);
2997                }
2998            }
2999        }
3000
3001        assert!(files.next().is_none());
3002        assert!(visible_files.next().is_none());
3003
3004        let mut bfs_paths = Vec::new();
3005        let mut stack = self
3006            .root_entry()
3007            .map(|e| e.path.as_ref())
3008            .into_iter()
3009            .collect::<Vec<_>>();
3010        while let Some(path) = stack.pop() {
3011            bfs_paths.push(path);
3012            let ix = stack.len();
3013            for child_entry in self.child_entries(path) {
3014                stack.insert(ix, &child_entry.path);
3015            }
3016        }
3017
3018        let dfs_paths_via_iter = self
3019            .entries_by_path
3020            .cursor::<()>(&())
3021            .map(|e| e.path.as_ref())
3022            .collect::<Vec<_>>();
3023        assert_eq!(bfs_paths, dfs_paths_via_iter);
3024
3025        let dfs_paths_via_traversal = self
3026            .entries(true, 0)
3027            .map(|e| e.path.as_ref())
3028            .collect::<Vec<_>>();
3029        assert_eq!(dfs_paths_via_traversal, dfs_paths_via_iter);
3030
3031        if git_state {
3032            for ignore_parent_abs_path in self.ignores_by_parent_abs_path.keys() {
3033                let ignore_parent_path = ignore_parent_abs_path
3034                    .strip_prefix(self.abs_path.as_path())
3035                    .unwrap();
3036                assert!(self.entry_for_path(ignore_parent_path).is_some());
3037                assert!(self
3038                    .entry_for_path(ignore_parent_path.join(*GITIGNORE))
3039                    .is_some());
3040            }
3041        }
3042    }
3043
3044    #[cfg(test)]
3045    fn check_git_invariants(&self) {
3046        let dotgit_paths = self
3047            .git_repositories
3048            .iter()
3049            .map(|repo| repo.1.dot_git_dir_abs_path.clone())
3050            .collect::<HashSet<_>>();
3051        let work_dir_paths = self
3052            .repositories
3053            .iter()
3054            .map(|repo| repo.work_directory.path.clone())
3055            .collect::<HashSet<_>>();
3056        assert_eq!(dotgit_paths.len(), work_dir_paths.len());
3057        assert_eq!(self.repositories.iter().count(), work_dir_paths.len());
3058        assert_eq!(self.git_repositories.iter().count(), work_dir_paths.len());
3059        for entry in self.repositories.iter() {
3060            self.git_repositories.get(&entry.work_directory_id).unwrap();
3061        }
3062    }
3063
3064    #[cfg(test)]
3065    pub fn entries_without_ids(&self, include_ignored: bool) -> Vec<(&Path, u64, bool)> {
3066        let mut paths = Vec::new();
3067        for entry in self.entries_by_path.cursor::<()>(&()) {
3068            if include_ignored || !entry.is_ignored {
3069                paths.push((entry.path.as_ref(), entry.inode, entry.is_ignored));
3070            }
3071        }
3072        paths.sort_by(|a, b| a.0.cmp(b.0));
3073        paths
3074    }
3075}
3076
3077impl BackgroundScannerState {
3078    fn should_scan_directory(&self, entry: &Entry) -> bool {
3079        (!entry.is_external && (!entry.is_ignored || entry.is_always_included))
3080            || entry.path.file_name() == Some(*DOT_GIT)
3081            || entry.path.file_name() == Some(local_settings_folder_relative_path().as_os_str())
3082            || self.scanned_dirs.contains(&entry.id) // If we've ever scanned it, keep scanning
3083            || self
3084                .paths_to_scan
3085                .iter()
3086                .any(|p| p.starts_with(&entry.path))
3087            || self
3088                .path_prefixes_to_scan
3089                .iter()
3090                .any(|p| entry.path.starts_with(p))
3091    }
3092
3093    fn enqueue_scan_dir(&self, abs_path: Arc<Path>, entry: &Entry, scan_job_tx: &Sender<ScanJob>) {
3094        let path = entry.path.clone();
3095        let ignore_stack = self.snapshot.ignore_stack_for_abs_path(&abs_path, true);
3096        let mut ancestor_inodes = self.snapshot.ancestor_inodes_for_path(&path);
3097
3098        if !ancestor_inodes.contains(&entry.inode) {
3099            ancestor_inodes.insert(entry.inode);
3100            scan_job_tx
3101                .try_send(ScanJob {
3102                    abs_path,
3103                    path,
3104                    ignore_stack,
3105                    scan_queue: scan_job_tx.clone(),
3106                    ancestor_inodes,
3107                    is_external: entry.is_external,
3108                })
3109                .unwrap();
3110        }
3111    }
3112
3113    fn reuse_entry_id(&mut self, entry: &mut Entry) {
3114        if let Some(mtime) = entry.mtime {
3115            // If an entry with the same inode was removed from the worktree during this scan,
3116            // then it *might* represent the same file or directory. But the OS might also have
3117            // re-used the inode for a completely different file or directory.
3118            //
3119            // Conditionally reuse the old entry's id:
3120            // * if the mtime is the same, the file was probably been renamed.
3121            // * if the path is the same, the file may just have been updated
3122            if let Some(removed_entry) = self.removed_entries.remove(&entry.inode) {
3123                if removed_entry.mtime == Some(mtime) || removed_entry.path == entry.path {
3124                    entry.id = removed_entry.id;
3125                }
3126            } else if let Some(existing_entry) = self.snapshot.entry_for_path(&entry.path) {
3127                entry.id = existing_entry.id;
3128            }
3129        }
3130    }
3131
3132    fn insert_entry(&mut self, mut entry: Entry, fs: &dyn Fs, watcher: &dyn Watcher) -> Entry {
3133        self.reuse_entry_id(&mut entry);
3134        let entry = self.snapshot.insert_entry(entry, fs);
3135        if entry.path.file_name() == Some(&DOT_GIT) {
3136            self.insert_git_repository(entry.path.clone(), fs, watcher);
3137        }
3138
3139        #[cfg(test)]
3140        self.snapshot.check_invariants(false);
3141
3142        entry
3143    }
3144
3145    fn populate_dir(
3146        &mut self,
3147        parent_path: &Arc<Path>,
3148        entries: impl IntoIterator<Item = Entry>,
3149        ignore: Option<Arc<Gitignore>>,
3150    ) {
3151        let mut parent_entry = if let Some(parent_entry) = self
3152            .snapshot
3153            .entries_by_path
3154            .get(&PathKey(parent_path.clone()), &())
3155        {
3156            parent_entry.clone()
3157        } else {
3158            log::warn!(
3159                "populating a directory {:?} that has been removed",
3160                parent_path
3161            );
3162            return;
3163        };
3164
3165        match parent_entry.kind {
3166            EntryKind::PendingDir | EntryKind::UnloadedDir => parent_entry.kind = EntryKind::Dir,
3167            EntryKind::Dir => {}
3168            _ => return,
3169        }
3170
3171        if let Some(ignore) = ignore {
3172            let abs_parent_path = self.snapshot.abs_path.as_path().join(parent_path).into();
3173            self.snapshot
3174                .ignores_by_parent_abs_path
3175                .insert(abs_parent_path, (ignore, false));
3176        }
3177
3178        let parent_entry_id = parent_entry.id;
3179        self.scanned_dirs.insert(parent_entry_id);
3180        let mut entries_by_path_edits = vec![Edit::Insert(parent_entry)];
3181        let mut entries_by_id_edits = Vec::new();
3182
3183        for entry in entries {
3184            entries_by_id_edits.push(Edit::Insert(PathEntry {
3185                id: entry.id,
3186                path: entry.path.clone(),
3187                is_ignored: entry.is_ignored,
3188                scan_id: self.snapshot.scan_id,
3189            }));
3190            entries_by_path_edits.push(Edit::Insert(entry));
3191        }
3192
3193        self.snapshot
3194            .entries_by_path
3195            .edit(entries_by_path_edits, &());
3196        self.snapshot.entries_by_id.edit(entries_by_id_edits, &());
3197
3198        if let Err(ix) = self.changed_paths.binary_search(parent_path) {
3199            self.changed_paths.insert(ix, parent_path.clone());
3200        }
3201
3202        #[cfg(test)]
3203        self.snapshot.check_invariants(false);
3204    }
3205
3206    fn remove_path(&mut self, path: &Path) {
3207        let mut new_entries;
3208        let removed_entries;
3209        {
3210            let mut cursor = self
3211                .snapshot
3212                .entries_by_path
3213                .cursor::<TraversalProgress>(&());
3214            new_entries = cursor.slice(&TraversalTarget::path(path), Bias::Left, &());
3215            removed_entries = cursor.slice(&TraversalTarget::successor(path), Bias::Left, &());
3216            new_entries.append(cursor.suffix(&()), &());
3217        }
3218        self.snapshot.entries_by_path = new_entries;
3219
3220        let mut removed_ids = Vec::with_capacity(removed_entries.summary().count);
3221        for entry in removed_entries.cursor::<()>(&()) {
3222            match self.removed_entries.entry(entry.inode) {
3223                hash_map::Entry::Occupied(mut e) => {
3224                    let prev_removed_entry = e.get_mut();
3225                    if entry.id > prev_removed_entry.id {
3226                        *prev_removed_entry = entry.clone();
3227                    }
3228                }
3229                hash_map::Entry::Vacant(e) => {
3230                    e.insert(entry.clone());
3231                }
3232            }
3233
3234            if entry.path.file_name() == Some(&GITIGNORE) {
3235                let abs_parent_path = self
3236                    .snapshot
3237                    .abs_path
3238                    .as_path()
3239                    .join(entry.path.parent().unwrap());
3240                if let Some((_, needs_update)) = self
3241                    .snapshot
3242                    .ignores_by_parent_abs_path
3243                    .get_mut(abs_parent_path.as_path())
3244                {
3245                    *needs_update = true;
3246                }
3247            }
3248
3249            if let Err(ix) = removed_ids.binary_search(&entry.id) {
3250                removed_ids.insert(ix, entry.id);
3251            }
3252        }
3253
3254        self.snapshot.entries_by_id.edit(
3255            removed_ids.iter().map(|&id| Edit::Remove(id)).collect(),
3256            &(),
3257        );
3258        self.snapshot
3259            .git_repositories
3260            .retain(|id, _| removed_ids.binary_search(id).is_err());
3261        self.snapshot.repositories.retain(&(), |repository| {
3262            !repository.work_directory.starts_with(path)
3263        });
3264
3265        #[cfg(test)]
3266        self.snapshot.check_invariants(false);
3267    }
3268
3269    fn insert_git_repository(
3270        &mut self,
3271        dot_git_path: Arc<Path>,
3272        fs: &dyn Fs,
3273        watcher: &dyn Watcher,
3274    ) -> Option<LocalRepositoryEntry> {
3275        let work_dir_path: Arc<Path> = match dot_git_path.parent() {
3276            Some(parent_dir) => {
3277                // Guard against repositories inside the repository metadata
3278                if parent_dir.iter().any(|component| component == *DOT_GIT) {
3279                    log::info!(
3280                        "not building git repository for nested `.git` directory, `.git` path in the worktree: {dot_git_path:?}"
3281                    );
3282                    return None;
3283                };
3284                log::info!(
3285                    "building git repository, `.git` path in the worktree: {dot_git_path:?}"
3286                );
3287
3288                parent_dir.into()
3289            }
3290            None => {
3291                // `dot_git_path.parent().is_none()` means `.git` directory is the opened worktree itself,
3292                // no files inside that directory are tracked by git, so no need to build the repo around it
3293                log::info!(
3294                    "not building git repository for the worktree itself, `.git` path in the worktree: {dot_git_path:?}"
3295                );
3296                return None;
3297            }
3298        };
3299
3300        self.insert_git_repository_for_path(work_dir_path, dot_git_path, None, fs, watcher)
3301    }
3302
3303    fn insert_git_repository_for_path(
3304        &mut self,
3305        work_dir_path: Arc<Path>,
3306        dot_git_path: Arc<Path>,
3307        location_in_repo: Option<Arc<Path>>,
3308        fs: &dyn Fs,
3309        watcher: &dyn Watcher,
3310    ) -> Option<LocalRepositoryEntry> {
3311        let work_dir_id = self
3312            .snapshot
3313            .entry_for_path(work_dir_path.clone())
3314            .map(|entry| entry.id)?;
3315
3316        if self.snapshot.git_repositories.get(&work_dir_id).is_some() {
3317            return None;
3318        }
3319
3320        let dot_git_abs_path = self.snapshot.abs_path.as_path().join(&dot_git_path);
3321
3322        let t0 = Instant::now();
3323        let repository = fs.open_repo(&dot_git_abs_path)?;
3324
3325        let actual_repo_path = repository.dot_git_dir();
3326
3327        let actual_dot_git_dir_abs_path = smol::block_on(find_git_dir(&actual_repo_path, fs))?;
3328        watcher.add(&actual_repo_path).log_err()?;
3329
3330        let dot_git_worktree_abs_path = if actual_dot_git_dir_abs_path.as_ref() == dot_git_abs_path
3331        {
3332            None
3333        } else {
3334            // The two paths could be different because we opened a git worktree.
3335            // When that happens, the .git path in the worktree (`dot_git_abs_path`) is a file that
3336            // points to the worktree-subdirectory in the actual .git directory (`git_dir_path`)
3337            watcher.add(&dot_git_abs_path).log_err()?;
3338            Some(Arc::from(dot_git_abs_path))
3339        };
3340
3341        log::trace!("constructed libgit2 repo in {:?}", t0.elapsed());
3342        let work_directory = WorkDirectory {
3343            path: work_dir_path.clone(),
3344            location_in_repo,
3345        };
3346
3347        if let Some(git_hosting_provider_registry) = self.git_hosting_provider_registry.clone() {
3348            git_hosting_providers::register_additional_providers(
3349                git_hosting_provider_registry,
3350                repository.clone(),
3351            );
3352        }
3353
3354        self.snapshot.repositories.insert_or_replace(
3355            RepositoryEntry {
3356                work_directory_id: work_dir_id,
3357                work_directory: work_directory.clone(),
3358                branch: repository.branch_name().map(Into::into),
3359                statuses_by_path: Default::default(),
3360            },
3361            &(),
3362        );
3363
3364        let local_repository = LocalRepositoryEntry {
3365            work_directory: work_directory.clone(),
3366            git_dir_scan_id: 0,
3367            status_scan_id: 0,
3368            repo_ptr: repository.clone(),
3369            dot_git_dir_abs_path: actual_dot_git_dir_abs_path,
3370            dot_git_worktree_abs_path,
3371        };
3372
3373        self.snapshot
3374            .git_repositories
3375            .insert(work_dir_id, local_repository.clone());
3376
3377        Some(local_repository)
3378    }
3379}
3380
3381async fn is_git_dir(path: &Path, fs: &dyn Fs) -> bool {
3382    if path.file_name() == Some(&*DOT_GIT) {
3383        return true;
3384    }
3385
3386    // If we're in a bare repository, we are not inside a `.git` folder. In a
3387    // bare repository, the root folder contains what would normally be in the
3388    // `.git` folder.
3389    let head_metadata = fs.metadata(&path.join("HEAD")).await;
3390    if !matches!(head_metadata, Ok(Some(_))) {
3391        return false;
3392    }
3393    let config_metadata = fs.metadata(&path.join("config")).await;
3394    matches!(config_metadata, Ok(Some(_)))
3395}
3396
3397async fn find_git_dir(path: &Path, fs: &dyn Fs) -> Option<Arc<Path>> {
3398    for ancestor in path.ancestors() {
3399        if is_git_dir(ancestor, fs).await {
3400            return Some(Arc::from(ancestor));
3401        }
3402    }
3403    None
3404}
3405
3406async fn build_gitignore(abs_path: &Path, fs: &dyn Fs) -> Result<Gitignore> {
3407    let contents = fs.load(abs_path).await?;
3408    let parent = abs_path.parent().unwrap_or_else(|| Path::new("/"));
3409    let mut builder = GitignoreBuilder::new(parent);
3410    for line in contents.lines() {
3411        builder.add_line(Some(abs_path.into()), line)?;
3412    }
3413    Ok(builder.build()?)
3414}
3415
3416impl Deref for Worktree {
3417    type Target = Snapshot;
3418
3419    fn deref(&self) -> &Self::Target {
3420        match self {
3421            Worktree::Local(worktree) => &worktree.snapshot,
3422            Worktree::Remote(worktree) => &worktree.snapshot,
3423        }
3424    }
3425}
3426
3427impl Deref for LocalWorktree {
3428    type Target = LocalSnapshot;
3429
3430    fn deref(&self) -> &Self::Target {
3431        &self.snapshot
3432    }
3433}
3434
3435impl Deref for RemoteWorktree {
3436    type Target = Snapshot;
3437
3438    fn deref(&self) -> &Self::Target {
3439        &self.snapshot
3440    }
3441}
3442
3443impl fmt::Debug for LocalWorktree {
3444    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
3445        self.snapshot.fmt(f)
3446    }
3447}
3448
3449impl fmt::Debug for Snapshot {
3450    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
3451        struct EntriesById<'a>(&'a SumTree<PathEntry>);
3452        struct EntriesByPath<'a>(&'a SumTree<Entry>);
3453
3454        impl<'a> fmt::Debug for EntriesByPath<'a> {
3455            fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
3456                f.debug_map()
3457                    .entries(self.0.iter().map(|entry| (&entry.path, entry.id)))
3458                    .finish()
3459            }
3460        }
3461
3462        impl<'a> fmt::Debug for EntriesById<'a> {
3463            fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
3464                f.debug_list().entries(self.0.iter()).finish()
3465            }
3466        }
3467
3468        f.debug_struct("Snapshot")
3469            .field("id", &self.id)
3470            .field("root_name", &self.root_name)
3471            .field("entries_by_path", &EntriesByPath(&self.entries_by_path))
3472            .field("entries_by_id", &EntriesById(&self.entries_by_id))
3473            .finish()
3474    }
3475}
3476
3477#[derive(Clone, PartialEq)]
3478pub struct File {
3479    pub worktree: Entity<Worktree>,
3480    pub path: Arc<Path>,
3481    pub disk_state: DiskState,
3482    pub entry_id: Option<ProjectEntryId>,
3483    pub is_local: bool,
3484    pub is_private: bool,
3485}
3486
3487impl language::File for File {
3488    fn as_local(&self) -> Option<&dyn language::LocalFile> {
3489        if self.is_local {
3490            Some(self)
3491        } else {
3492            None
3493        }
3494    }
3495
3496    fn disk_state(&self) -> DiskState {
3497        self.disk_state
3498    }
3499
3500    fn path(&self) -> &Arc<Path> {
3501        &self.path
3502    }
3503
3504    fn full_path(&self, cx: &App) -> PathBuf {
3505        let mut full_path = PathBuf::new();
3506        let worktree = self.worktree.read(cx);
3507
3508        if worktree.is_visible() {
3509            full_path.push(worktree.root_name());
3510        } else {
3511            let path = worktree.abs_path();
3512
3513            if worktree.is_local() && path.starts_with(home_dir().as_path()) {
3514                full_path.push("~");
3515                full_path.push(path.strip_prefix(home_dir().as_path()).unwrap());
3516            } else {
3517                full_path.push(path)
3518            }
3519        }
3520
3521        if self.path.components().next().is_some() {
3522            full_path.push(&self.path);
3523        }
3524
3525        full_path
3526    }
3527
3528    /// Returns the last component of this handle's absolute path. If this handle refers to the root
3529    /// of its worktree, then this method will return the name of the worktree itself.
3530    fn file_name<'a>(&'a self, cx: &'a App) -> &'a OsStr {
3531        self.path
3532            .file_name()
3533            .unwrap_or_else(|| OsStr::new(&self.worktree.read(cx).root_name))
3534    }
3535
3536    fn worktree_id(&self, cx: &App) -> WorktreeId {
3537        self.worktree.read(cx).id()
3538    }
3539
3540    fn as_any(&self) -> &dyn Any {
3541        self
3542    }
3543
3544    fn to_proto(&self, cx: &App) -> rpc::proto::File {
3545        rpc::proto::File {
3546            worktree_id: self.worktree.read(cx).id().to_proto(),
3547            entry_id: self.entry_id.map(|id| id.to_proto()),
3548            path: self.path.to_string_lossy().into(),
3549            mtime: self.disk_state.mtime().map(|time| time.into()),
3550            is_deleted: self.disk_state == DiskState::Deleted,
3551        }
3552    }
3553
3554    fn is_private(&self) -> bool {
3555        self.is_private
3556    }
3557}
3558
3559impl language::LocalFile for File {
3560    fn abs_path(&self, cx: &App) -> PathBuf {
3561        let worktree_path = &self.worktree.read(cx).as_local().unwrap().abs_path;
3562        if self.path.as_ref() == Path::new("") {
3563            worktree_path.as_path().to_path_buf()
3564        } else {
3565            worktree_path.as_path().join(&self.path)
3566        }
3567    }
3568
3569    fn load(&self, cx: &App) -> Task<Result<String>> {
3570        let worktree = self.worktree.read(cx).as_local().unwrap();
3571        let abs_path = worktree.absolutize(&self.path);
3572        let fs = worktree.fs.clone();
3573        cx.background_executor()
3574            .spawn(async move { fs.load(&abs_path?).await })
3575    }
3576
3577    fn load_bytes(&self, cx: &App) -> Task<Result<Vec<u8>>> {
3578        let worktree = self.worktree.read(cx).as_local().unwrap();
3579        let abs_path = worktree.absolutize(&self.path);
3580        let fs = worktree.fs.clone();
3581        cx.background_executor()
3582            .spawn(async move { fs.load_bytes(&abs_path?).await })
3583    }
3584}
3585
3586impl File {
3587    pub fn for_entry(entry: Entry, worktree: Entity<Worktree>) -> Arc<Self> {
3588        Arc::new(Self {
3589            worktree,
3590            path: entry.path.clone(),
3591            disk_state: if let Some(mtime) = entry.mtime {
3592                DiskState::Present { mtime }
3593            } else {
3594                DiskState::New
3595            },
3596            entry_id: Some(entry.id),
3597            is_local: true,
3598            is_private: entry.is_private,
3599        })
3600    }
3601
3602    pub fn from_proto(
3603        proto: rpc::proto::File,
3604        worktree: Entity<Worktree>,
3605        cx: &App,
3606    ) -> Result<Self> {
3607        let worktree_id = worktree
3608            .read(cx)
3609            .as_remote()
3610            .ok_or_else(|| anyhow!("not remote"))?
3611            .id();
3612
3613        if worktree_id.to_proto() != proto.worktree_id {
3614            return Err(anyhow!("worktree id does not match file"));
3615        }
3616
3617        let disk_state = if proto.is_deleted {
3618            DiskState::Deleted
3619        } else {
3620            if let Some(mtime) = proto.mtime.map(&Into::into) {
3621                DiskState::Present { mtime }
3622            } else {
3623                DiskState::New
3624            }
3625        };
3626
3627        Ok(Self {
3628            worktree,
3629            path: Path::new(&proto.path).into(),
3630            disk_state,
3631            entry_id: proto.entry_id.map(ProjectEntryId::from_proto),
3632            is_local: false,
3633            is_private: false,
3634        })
3635    }
3636
3637    pub fn from_dyn(file: Option<&Arc<dyn language::File>>) -> Option<&Self> {
3638        file.and_then(|f| f.as_any().downcast_ref())
3639    }
3640
3641    pub fn worktree_id(&self, cx: &App) -> WorktreeId {
3642        self.worktree.read(cx).id()
3643    }
3644
3645    pub fn project_entry_id(&self, _: &App) -> Option<ProjectEntryId> {
3646        match self.disk_state {
3647            DiskState::Deleted => None,
3648            _ => self.entry_id,
3649        }
3650    }
3651}
3652
3653#[derive(Clone, Debug, PartialEq, Eq)]
3654pub struct Entry {
3655    pub id: ProjectEntryId,
3656    pub kind: EntryKind,
3657    pub path: Arc<Path>,
3658    pub inode: u64,
3659    pub mtime: Option<MTime>,
3660
3661    pub canonical_path: Option<Box<Path>>,
3662    /// Whether this entry is ignored by Git.
3663    ///
3664    /// We only scan ignored entries once the directory is expanded and
3665    /// exclude them from searches.
3666    pub is_ignored: bool,
3667
3668    /// Whether this entry is always included in searches.
3669    ///
3670    /// This is used for entries that are always included in searches, even
3671    /// if they are ignored by git. Overridden by file_scan_exclusions.
3672    pub is_always_included: bool,
3673
3674    /// Whether this entry's canonical path is outside of the worktree.
3675    /// This means the entry is only accessible from the worktree root via a
3676    /// symlink.
3677    ///
3678    /// We only scan entries outside of the worktree once the symlinked
3679    /// directory is expanded. External entries are treated like gitignored
3680    /// entries in that they are not included in searches.
3681    pub is_external: bool,
3682
3683    /// Whether this entry is considered to be a `.env` file.
3684    pub is_private: bool,
3685    /// The entry's size on disk, in bytes.
3686    pub size: u64,
3687    pub char_bag: CharBag,
3688    pub is_fifo: bool,
3689}
3690
3691#[derive(Clone, Copy, Debug, PartialEq, Eq)]
3692pub enum EntryKind {
3693    UnloadedDir,
3694    PendingDir,
3695    Dir,
3696    File,
3697}
3698
3699#[derive(Clone, Copy, Debug, PartialEq)]
3700pub enum PathChange {
3701    /// A filesystem entry was was created.
3702    Added,
3703    /// A filesystem entry was removed.
3704    Removed,
3705    /// A filesystem entry was updated.
3706    Updated,
3707    /// A filesystem entry was either updated or added. We don't know
3708    /// whether or not it already existed, because the path had not
3709    /// been loaded before the event.
3710    AddedOrUpdated,
3711    /// A filesystem entry was found during the initial scan of the worktree.
3712    Loaded,
3713}
3714
3715#[derive(Debug)]
3716pub struct GitRepositoryChange {
3717    /// The previous state of the repository, if it already existed.
3718    pub old_repository: Option<RepositoryEntry>,
3719}
3720
3721pub type UpdatedEntriesSet = Arc<[(Arc<Path>, ProjectEntryId, PathChange)]>;
3722pub type UpdatedGitRepositoriesSet = Arc<[(Arc<Path>, GitRepositoryChange)]>;
3723
3724#[derive(Clone, Debug, PartialEq, Eq)]
3725pub struct StatusEntry {
3726    pub repo_path: RepoPath,
3727    pub status: FileStatus,
3728}
3729
3730impl StatusEntry {
3731    pub fn is_staged(&self) -> Option<bool> {
3732        self.status.is_staged()
3733    }
3734
3735    fn to_proto(&self) -> proto::StatusEntry {
3736        let simple_status = match self.status {
3737            FileStatus::Ignored | FileStatus::Untracked => proto::GitStatus::Added as i32,
3738            FileStatus::Unmerged { .. } => proto::GitStatus::Conflict as i32,
3739            FileStatus::Tracked(TrackedStatus {
3740                index_status,
3741                worktree_status,
3742            }) => tracked_status_to_proto(if worktree_status != StatusCode::Unmodified {
3743                worktree_status
3744            } else {
3745                index_status
3746            }),
3747        };
3748        proto::StatusEntry {
3749            repo_path: self.repo_path.to_proto(),
3750            simple_status,
3751            status: Some(status_to_proto(self.status)),
3752        }
3753    }
3754}
3755
3756impl TryFrom<proto::StatusEntry> for StatusEntry {
3757    type Error = anyhow::Error;
3758
3759    fn try_from(value: proto::StatusEntry) -> Result<Self, Self::Error> {
3760        let repo_path = RepoPath(Path::new(&value.repo_path).into());
3761        let status = status_from_proto(value.simple_status, value.status)?;
3762        Ok(Self { repo_path, status })
3763    }
3764}
3765
3766#[derive(Clone, Debug)]
3767struct PathProgress<'a> {
3768    max_path: &'a Path,
3769}
3770
3771#[derive(Clone, Debug)]
3772pub struct PathSummary<S> {
3773    max_path: Arc<Path>,
3774    item_summary: S,
3775}
3776
3777impl<S: Summary> Summary for PathSummary<S> {
3778    type Context = S::Context;
3779
3780    fn zero(cx: &Self::Context) -> Self {
3781        Self {
3782            max_path: Path::new("").into(),
3783            item_summary: S::zero(cx),
3784        }
3785    }
3786
3787    fn add_summary(&mut self, rhs: &Self, cx: &Self::Context) {
3788        self.max_path = rhs.max_path.clone();
3789        self.item_summary.add_summary(&rhs.item_summary, cx);
3790    }
3791}
3792
3793impl<'a, S: Summary> sum_tree::Dimension<'a, PathSummary<S>> for PathProgress<'a> {
3794    fn zero(_: &<PathSummary<S> as Summary>::Context) -> Self {
3795        Self {
3796            max_path: Path::new(""),
3797        }
3798    }
3799
3800    fn add_summary(
3801        &mut self,
3802        summary: &'a PathSummary<S>,
3803        _: &<PathSummary<S> as Summary>::Context,
3804    ) {
3805        self.max_path = summary.max_path.as_ref()
3806    }
3807}
3808
3809impl sum_tree::Item for RepositoryEntry {
3810    type Summary = PathSummary<Unit>;
3811
3812    fn summary(&self, _: &<Self::Summary as Summary>::Context) -> Self::Summary {
3813        PathSummary {
3814            max_path: self.work_directory.path.clone(),
3815            item_summary: Unit,
3816        }
3817    }
3818}
3819
3820impl sum_tree::KeyedItem for RepositoryEntry {
3821    type Key = PathKey;
3822
3823    fn key(&self) -> Self::Key {
3824        PathKey(self.work_directory.path.clone())
3825    }
3826}
3827
3828impl sum_tree::Item for StatusEntry {
3829    type Summary = PathSummary<GitSummary>;
3830
3831    fn summary(&self, _: &<Self::Summary as Summary>::Context) -> Self::Summary {
3832        PathSummary {
3833            max_path: self.repo_path.0.clone(),
3834            item_summary: self.status.summary(),
3835        }
3836    }
3837}
3838
3839impl sum_tree::KeyedItem for StatusEntry {
3840    type Key = PathKey;
3841
3842    fn key(&self) -> Self::Key {
3843        PathKey(self.repo_path.0.clone())
3844    }
3845}
3846
3847impl<'a> sum_tree::Dimension<'a, PathSummary<GitSummary>> for GitSummary {
3848    fn zero(_cx: &()) -> Self {
3849        Default::default()
3850    }
3851
3852    fn add_summary(&mut self, summary: &'a PathSummary<GitSummary>, _: &()) {
3853        *self += summary.item_summary
3854    }
3855}
3856
3857impl<'a, S: Summary> sum_tree::Dimension<'a, PathSummary<S>> for PathKey {
3858    fn zero(_: &S::Context) -> Self {
3859        Default::default()
3860    }
3861
3862    fn add_summary(&mut self, summary: &'a PathSummary<S>, _: &S::Context) {
3863        self.0 = summary.max_path.clone();
3864    }
3865}
3866
3867impl<'a, S: Summary> sum_tree::Dimension<'a, PathSummary<S>> for TraversalProgress<'a> {
3868    fn zero(_cx: &S::Context) -> Self {
3869        Default::default()
3870    }
3871
3872    fn add_summary(&mut self, summary: &'a PathSummary<S>, _: &S::Context) {
3873        self.max_path = summary.max_path.as_ref();
3874    }
3875}
3876
3877impl Entry {
3878    fn new(
3879        path: Arc<Path>,
3880        metadata: &fs::Metadata,
3881        next_entry_id: &AtomicUsize,
3882        root_char_bag: CharBag,
3883        canonical_path: Option<Box<Path>>,
3884    ) -> Self {
3885        let char_bag = char_bag_for_path(root_char_bag, &path);
3886        Self {
3887            id: ProjectEntryId::new(next_entry_id),
3888            kind: if metadata.is_dir {
3889                EntryKind::PendingDir
3890            } else {
3891                EntryKind::File
3892            },
3893            path,
3894            inode: metadata.inode,
3895            mtime: Some(metadata.mtime),
3896            size: metadata.len,
3897            canonical_path,
3898            is_ignored: false,
3899            is_always_included: false,
3900            is_external: false,
3901            is_private: false,
3902            char_bag,
3903            is_fifo: metadata.is_fifo,
3904        }
3905    }
3906
3907    pub fn is_created(&self) -> bool {
3908        self.mtime.is_some()
3909    }
3910
3911    pub fn is_dir(&self) -> bool {
3912        self.kind.is_dir()
3913    }
3914
3915    pub fn is_file(&self) -> bool {
3916        self.kind.is_file()
3917    }
3918}
3919
3920impl EntryKind {
3921    pub fn is_dir(&self) -> bool {
3922        matches!(
3923            self,
3924            EntryKind::Dir | EntryKind::PendingDir | EntryKind::UnloadedDir
3925        )
3926    }
3927
3928    pub fn is_unloaded(&self) -> bool {
3929        matches!(self, EntryKind::UnloadedDir)
3930    }
3931
3932    pub fn is_file(&self) -> bool {
3933        matches!(self, EntryKind::File)
3934    }
3935}
3936
3937impl sum_tree::Item for Entry {
3938    type Summary = EntrySummary;
3939
3940    fn summary(&self, _cx: &()) -> Self::Summary {
3941        let non_ignored_count = if (self.is_ignored || self.is_external) && !self.is_always_included
3942        {
3943            0
3944        } else {
3945            1
3946        };
3947        let file_count;
3948        let non_ignored_file_count;
3949        if self.is_file() {
3950            file_count = 1;
3951            non_ignored_file_count = non_ignored_count;
3952        } else {
3953            file_count = 0;
3954            non_ignored_file_count = 0;
3955        }
3956
3957        EntrySummary {
3958            max_path: self.path.clone(),
3959            count: 1,
3960            non_ignored_count,
3961            file_count,
3962            non_ignored_file_count,
3963        }
3964    }
3965}
3966
3967impl sum_tree::KeyedItem for Entry {
3968    type Key = PathKey;
3969
3970    fn key(&self) -> Self::Key {
3971        PathKey(self.path.clone())
3972    }
3973}
3974
3975#[derive(Clone, Debug)]
3976pub struct EntrySummary {
3977    max_path: Arc<Path>,
3978    count: usize,
3979    non_ignored_count: usize,
3980    file_count: usize,
3981    non_ignored_file_count: usize,
3982}
3983
3984impl Default for EntrySummary {
3985    fn default() -> Self {
3986        Self {
3987            max_path: Arc::from(Path::new("")),
3988            count: 0,
3989            non_ignored_count: 0,
3990            file_count: 0,
3991            non_ignored_file_count: 0,
3992        }
3993    }
3994}
3995
3996impl sum_tree::Summary for EntrySummary {
3997    type Context = ();
3998
3999    fn zero(_cx: &()) -> Self {
4000        Default::default()
4001    }
4002
4003    fn add_summary(&mut self, rhs: &Self, _: &()) {
4004        self.max_path = rhs.max_path.clone();
4005        self.count += rhs.count;
4006        self.non_ignored_count += rhs.non_ignored_count;
4007        self.file_count += rhs.file_count;
4008        self.non_ignored_file_count += rhs.non_ignored_file_count;
4009    }
4010}
4011
4012#[derive(Clone, Debug)]
4013struct PathEntry {
4014    id: ProjectEntryId,
4015    path: Arc<Path>,
4016    is_ignored: bool,
4017    scan_id: usize,
4018}
4019
4020impl sum_tree::Item for PathEntry {
4021    type Summary = PathEntrySummary;
4022
4023    fn summary(&self, _cx: &()) -> Self::Summary {
4024        PathEntrySummary { max_id: self.id }
4025    }
4026}
4027
4028impl sum_tree::KeyedItem for PathEntry {
4029    type Key = ProjectEntryId;
4030
4031    fn key(&self) -> Self::Key {
4032        self.id
4033    }
4034}
4035
4036#[derive(Clone, Debug, Default)]
4037struct PathEntrySummary {
4038    max_id: ProjectEntryId,
4039}
4040
4041impl sum_tree::Summary for PathEntrySummary {
4042    type Context = ();
4043
4044    fn zero(_cx: &Self::Context) -> Self {
4045        Default::default()
4046    }
4047
4048    fn add_summary(&mut self, summary: &Self, _: &Self::Context) {
4049        self.max_id = summary.max_id;
4050    }
4051}
4052
4053impl<'a> sum_tree::Dimension<'a, PathEntrySummary> for ProjectEntryId {
4054    fn zero(_cx: &()) -> Self {
4055        Default::default()
4056    }
4057
4058    fn add_summary(&mut self, summary: &'a PathEntrySummary, _: &()) {
4059        *self = summary.max_id;
4060    }
4061}
4062
4063#[derive(Clone, Debug, Eq, PartialEq, Ord, PartialOrd)]
4064pub struct PathKey(Arc<Path>);
4065
4066impl Default for PathKey {
4067    fn default() -> Self {
4068        Self(Path::new("").into())
4069    }
4070}
4071
4072impl<'a> sum_tree::Dimension<'a, EntrySummary> for PathKey {
4073    fn zero(_cx: &()) -> Self {
4074        Default::default()
4075    }
4076
4077    fn add_summary(&mut self, summary: &'a EntrySummary, _: &()) {
4078        self.0 = summary.max_path.clone();
4079    }
4080}
4081
4082struct BackgroundScanner {
4083    state: Mutex<BackgroundScannerState>,
4084    fs: Arc<dyn Fs>,
4085    fs_case_sensitive: bool,
4086    status_updates_tx: UnboundedSender<ScanState>,
4087    executor: BackgroundExecutor,
4088    scan_requests_rx: channel::Receiver<ScanRequest>,
4089    path_prefixes_to_scan_rx: channel::Receiver<PathPrefixScanRequest>,
4090    next_entry_id: Arc<AtomicUsize>,
4091    phase: BackgroundScannerPhase,
4092    watcher: Arc<dyn Watcher>,
4093    settings: WorktreeSettings,
4094    share_private_files: bool,
4095}
4096
4097#[derive(PartialEq)]
4098enum BackgroundScannerPhase {
4099    InitialScan,
4100    EventsReceivedDuringInitialScan,
4101    Events,
4102}
4103
4104impl BackgroundScanner {
4105    async fn run(&mut self, mut fs_events_rx: Pin<Box<dyn Send + Stream<Item = Vec<PathEvent>>>>) {
4106        use futures::FutureExt as _;
4107
4108        // If the worktree root does not contain a git repository, then find
4109        // the git repository in an ancestor directory. Find any gitignore files
4110        // in ancestor directories.
4111        let root_abs_path = self.state.lock().snapshot.abs_path.clone();
4112        for (index, ancestor) in root_abs_path.as_path().ancestors().enumerate() {
4113            if index != 0 {
4114                if let Ok(ignore) =
4115                    build_gitignore(&ancestor.join(*GITIGNORE), self.fs.as_ref()).await
4116                {
4117                    self.state
4118                        .lock()
4119                        .snapshot
4120                        .ignores_by_parent_abs_path
4121                        .insert(ancestor.into(), (ignore.into(), false));
4122                }
4123            }
4124
4125            let ancestor_dot_git = ancestor.join(*DOT_GIT);
4126            // Check whether the directory or file called `.git` exists (in the
4127            // case of worktrees it's a file.)
4128            if self
4129                .fs
4130                .metadata(&ancestor_dot_git)
4131                .await
4132                .is_ok_and(|metadata| metadata.is_some())
4133            {
4134                if index != 0 {
4135                    // We canonicalize, since the FS events use the canonicalized path.
4136                    if let Some(ancestor_dot_git) =
4137                        self.fs.canonicalize(&ancestor_dot_git).await.log_err()
4138                    {
4139                        // We associate the external git repo with our root folder and
4140                        // also mark where in the git repo the root folder is located.
4141                        self.state.lock().insert_git_repository_for_path(
4142                            Path::new("").into(),
4143                            ancestor_dot_git.into(),
4144                            Some(
4145                                root_abs_path
4146                                    .as_path()
4147                                    .strip_prefix(ancestor)
4148                                    .unwrap()
4149                                    .into(),
4150                            ),
4151                            self.fs.as_ref(),
4152                            self.watcher.as_ref(),
4153                        );
4154                    };
4155                }
4156
4157                // Reached root of git repository.
4158                break;
4159            }
4160        }
4161
4162        let (scan_job_tx, scan_job_rx) = channel::unbounded();
4163        {
4164            let mut state = self.state.lock();
4165            state.snapshot.scan_id += 1;
4166            if let Some(mut root_entry) = state.snapshot.root_entry().cloned() {
4167                let ignore_stack = state
4168                    .snapshot
4169                    .ignore_stack_for_abs_path(root_abs_path.as_path(), true);
4170                if ignore_stack.is_abs_path_ignored(root_abs_path.as_path(), true) {
4171                    root_entry.is_ignored = true;
4172                    state.insert_entry(root_entry.clone(), self.fs.as_ref(), self.watcher.as_ref());
4173                }
4174                state.enqueue_scan_dir(root_abs_path.into(), &root_entry, &scan_job_tx);
4175            }
4176        };
4177
4178        // Perform an initial scan of the directory.
4179        drop(scan_job_tx);
4180        self.scan_dirs(true, scan_job_rx).await;
4181        {
4182            let mut state = self.state.lock();
4183            state.snapshot.completed_scan_id = state.snapshot.scan_id;
4184        }
4185
4186        self.send_status_update(false, SmallVec::new());
4187
4188        // Process any any FS events that occurred while performing the initial scan.
4189        // For these events, update events cannot be as precise, because we didn't
4190        // have the previous state loaded yet.
4191        self.phase = BackgroundScannerPhase::EventsReceivedDuringInitialScan;
4192        if let Poll::Ready(Some(mut paths)) = futures::poll!(fs_events_rx.next()) {
4193            while let Poll::Ready(Some(more_paths)) = futures::poll!(fs_events_rx.next()) {
4194                paths.extend(more_paths);
4195            }
4196            self.process_events(paths.into_iter().map(Into::into).collect())
4197                .await;
4198        }
4199
4200        // Continue processing events until the worktree is dropped.
4201        self.phase = BackgroundScannerPhase::Events;
4202
4203        loop {
4204            select_biased! {
4205                // Process any path refresh requests from the worktree. Prioritize
4206                // these before handling changes reported by the filesystem.
4207                request = self.next_scan_request().fuse() => {
4208                    let Ok(request) = request else { break };
4209                    if !self.process_scan_request(request, false).await {
4210                        return;
4211                    }
4212                }
4213
4214                path_prefix_request = self.path_prefixes_to_scan_rx.recv().fuse() => {
4215                    let Ok(request) = path_prefix_request else { break };
4216                    log::trace!("adding path prefix {:?}", request.path);
4217
4218                    let did_scan = self.forcibly_load_paths(&[request.path.clone()]).await;
4219                    if did_scan {
4220                        let abs_path =
4221                        {
4222                            let mut state = self.state.lock();
4223                            state.path_prefixes_to_scan.insert(request.path.clone());
4224                            state.snapshot.abs_path.as_path().join(&request.path)
4225                        };
4226
4227                        if let Some(abs_path) = self.fs.canonicalize(&abs_path).await.log_err() {
4228                            self.process_events(vec![abs_path]).await;
4229                        }
4230                    }
4231                    self.send_status_update(false, request.done);
4232                }
4233
4234                paths = fs_events_rx.next().fuse() => {
4235                    let Some(mut paths) = paths else { break };
4236                    while let Poll::Ready(Some(more_paths)) = futures::poll!(fs_events_rx.next()) {
4237                        paths.extend(more_paths);
4238                    }
4239                    self.process_events(paths.into_iter().map(Into::into).collect()).await;
4240                }
4241            }
4242        }
4243    }
4244
4245    async fn process_scan_request(&self, mut request: ScanRequest, scanning: bool) -> bool {
4246        log::debug!("rescanning paths {:?}", request.relative_paths);
4247
4248        request.relative_paths.sort_unstable();
4249        self.forcibly_load_paths(&request.relative_paths).await;
4250
4251        let root_path = self.state.lock().snapshot.abs_path.clone();
4252        let root_canonical_path = match self.fs.canonicalize(root_path.as_path()).await {
4253            Ok(path) => SanitizedPath::from(path),
4254            Err(err) => {
4255                log::error!("failed to canonicalize root path: {}", err);
4256                return true;
4257            }
4258        };
4259        let abs_paths = request
4260            .relative_paths
4261            .iter()
4262            .map(|path| {
4263                if path.file_name().is_some() {
4264                    root_canonical_path.as_path().join(path).to_path_buf()
4265                } else {
4266                    root_canonical_path.as_path().to_path_buf()
4267                }
4268            })
4269            .collect::<Vec<_>>();
4270
4271        {
4272            let mut state = self.state.lock();
4273            let is_idle = state.snapshot.completed_scan_id == state.snapshot.scan_id;
4274            state.snapshot.scan_id += 1;
4275            if is_idle {
4276                state.snapshot.completed_scan_id = state.snapshot.scan_id;
4277            }
4278        }
4279
4280        self.reload_entries_for_paths(
4281            root_path,
4282            root_canonical_path,
4283            &request.relative_paths,
4284            abs_paths,
4285            None,
4286        )
4287        .await;
4288
4289        self.send_status_update(scanning, request.done)
4290    }
4291
4292    async fn process_events(&self, mut abs_paths: Vec<PathBuf>) {
4293        let root_path = self.state.lock().snapshot.abs_path.clone();
4294        let root_canonical_path = match self.fs.canonicalize(root_path.as_path()).await {
4295            Ok(path) => SanitizedPath::from(path),
4296            Err(err) => {
4297                let new_path = self
4298                    .state
4299                    .lock()
4300                    .snapshot
4301                    .root_file_handle
4302                    .clone()
4303                    .and_then(|handle| handle.current_path(&self.fs).log_err())
4304                    .map(SanitizedPath::from)
4305                    .filter(|new_path| *new_path != root_path);
4306
4307                if let Some(new_path) = new_path.as_ref() {
4308                    log::info!(
4309                        "root renamed from {} to {}",
4310                        root_path.as_path().display(),
4311                        new_path.as_path().display()
4312                    )
4313                } else {
4314                    log::warn!("root path could not be canonicalized: {}", err);
4315                }
4316                self.status_updates_tx
4317                    .unbounded_send(ScanState::RootUpdated { new_path })
4318                    .ok();
4319                return;
4320            }
4321        };
4322
4323        let mut relative_paths = Vec::with_capacity(abs_paths.len());
4324        let mut dot_git_abs_paths = Vec::new();
4325        abs_paths.sort_unstable();
4326        abs_paths.dedup_by(|a, b| a.starts_with(b));
4327        abs_paths.retain(|abs_path| {
4328            let abs_path = SanitizedPath::from(abs_path);
4329            let snapshot = &self.state.lock().snapshot;
4330            {
4331                let mut is_git_related = false;
4332
4333                // We don't want to trigger .git rescan for events within .git/fsmonitor--daemon/cookies directory.
4334                #[derive(PartialEq)]
4335                enum FsMonitorParseState {
4336                    Cookies,
4337                    FsMonitor
4338                }
4339                let mut fsmonitor_parse_state = None;
4340                if let Some(dot_git_abs_path) = abs_path.as_path()
4341                    .ancestors()
4342                    .find(|ancestor| {
4343                        let file_name = ancestor.file_name();
4344                        if file_name == Some(*COOKIES) {
4345                            fsmonitor_parse_state = Some(FsMonitorParseState::Cookies);
4346                            false
4347                        } else if fsmonitor_parse_state == Some(FsMonitorParseState::Cookies) && file_name == Some(*FSMONITOR_DAEMON) {
4348                            fsmonitor_parse_state = Some(FsMonitorParseState::FsMonitor);
4349                            false
4350                        } else if fsmonitor_parse_state != Some(FsMonitorParseState::FsMonitor) && smol::block_on(is_git_dir(ancestor, self.fs.as_ref())) {
4351                            true
4352                        } else {
4353                            fsmonitor_parse_state.take();
4354                            false
4355                        }
4356
4357                    })
4358                {
4359                    let dot_git_abs_path = dot_git_abs_path.to_path_buf();
4360                    if !dot_git_abs_paths.contains(&dot_git_abs_path) {
4361                        dot_git_abs_paths.push(dot_git_abs_path);
4362                    }
4363                    is_git_related = true;
4364                }
4365
4366                let relative_path: Arc<Path> =
4367                    if let Ok(path) = abs_path.strip_prefix(&root_canonical_path) {
4368                        path.into()
4369                    } else {
4370                        if is_git_related {
4371                            log::debug!(
4372                              "ignoring event {abs_path:?}, since it's in git dir outside of root path {root_canonical_path:?}",
4373                            );
4374                        } else {
4375                            log::error!(
4376                              "ignoring event {abs_path:?} outside of root path {root_canonical_path:?}",
4377                            );
4378                        }
4379                        return false;
4380                    };
4381
4382                let parent_dir_is_loaded = relative_path.parent().map_or(true, |parent| {
4383                    snapshot
4384                        .entry_for_path(parent)
4385                        .map_or(false, |entry| entry.kind == EntryKind::Dir)
4386                });
4387                if !parent_dir_is_loaded {
4388                    log::debug!("ignoring event {relative_path:?} within unloaded directory");
4389                    return false;
4390                }
4391
4392                if self.settings.is_path_excluded(&relative_path) {
4393                    if !is_git_related {
4394                        log::debug!("ignoring FS event for excluded path {relative_path:?}");
4395                    }
4396                    return false;
4397                }
4398
4399                relative_paths.push(relative_path);
4400                true
4401            }
4402        });
4403
4404        if relative_paths.is_empty() && dot_git_abs_paths.is_empty() {
4405            return;
4406        }
4407
4408        self.state.lock().snapshot.scan_id += 1;
4409
4410        let (scan_job_tx, scan_job_rx) = channel::unbounded();
4411        log::debug!("received fs events {:?}", relative_paths);
4412        self.reload_entries_for_paths(
4413            root_path,
4414            root_canonical_path,
4415            &relative_paths,
4416            abs_paths,
4417            Some(scan_job_tx.clone()),
4418        )
4419        .await;
4420
4421        self.update_ignore_statuses(scan_job_tx).await;
4422        self.scan_dirs(false, scan_job_rx).await;
4423
4424        if !dot_git_abs_paths.is_empty() {
4425            self.update_git_repositories(dot_git_abs_paths).await;
4426        }
4427
4428        {
4429            let mut state = self.state.lock();
4430            state.snapshot.completed_scan_id = state.snapshot.scan_id;
4431            for (_, entry) in mem::take(&mut state.removed_entries) {
4432                state.scanned_dirs.remove(&entry.id);
4433            }
4434        }
4435
4436        #[cfg(test)]
4437        self.state.lock().snapshot.check_git_invariants();
4438
4439        self.send_status_update(false, SmallVec::new());
4440    }
4441
4442    async fn forcibly_load_paths(&self, paths: &[Arc<Path>]) -> bool {
4443        let (scan_job_tx, scan_job_rx) = channel::unbounded();
4444        {
4445            let mut state = self.state.lock();
4446            let root_path = state.snapshot.abs_path.clone();
4447            for path in paths {
4448                for ancestor in path.ancestors() {
4449                    if let Some(entry) = state.snapshot.entry_for_path(ancestor) {
4450                        if entry.kind == EntryKind::UnloadedDir {
4451                            let abs_path = root_path.as_path().join(ancestor);
4452                            state.enqueue_scan_dir(abs_path.into(), entry, &scan_job_tx);
4453                            state.paths_to_scan.insert(path.clone());
4454                            break;
4455                        }
4456                    }
4457                }
4458            }
4459            drop(scan_job_tx);
4460        }
4461        while let Ok(job) = scan_job_rx.recv().await {
4462            self.scan_dir(&job).await.log_err();
4463        }
4464
4465        !mem::take(&mut self.state.lock().paths_to_scan).is_empty()
4466    }
4467
4468    async fn scan_dirs(
4469        &self,
4470        enable_progress_updates: bool,
4471        scan_jobs_rx: channel::Receiver<ScanJob>,
4472    ) {
4473        use futures::FutureExt as _;
4474
4475        if self
4476            .status_updates_tx
4477            .unbounded_send(ScanState::Started)
4478            .is_err()
4479        {
4480            return;
4481        }
4482
4483        let progress_update_count = AtomicUsize::new(0);
4484        self.executor
4485            .scoped(|scope| {
4486                for _ in 0..self.executor.num_cpus() {
4487                    scope.spawn(async {
4488                        let mut last_progress_update_count = 0;
4489                        let progress_update_timer = self.progress_timer(enable_progress_updates).fuse();
4490                        futures::pin_mut!(progress_update_timer);
4491
4492                        loop {
4493                            select_biased! {
4494                                // Process any path refresh requests before moving on to process
4495                                // the scan queue, so that user operations are prioritized.
4496                                request = self.next_scan_request().fuse() => {
4497                                    let Ok(request) = request else { break };
4498                                    if !self.process_scan_request(request, true).await {
4499                                        return;
4500                                    }
4501                                }
4502
4503                                // Send periodic progress updates to the worktree. Use an atomic counter
4504                                // to ensure that only one of the workers sends a progress update after
4505                                // the update interval elapses.
4506                                _ = progress_update_timer => {
4507                                    match progress_update_count.compare_exchange(
4508                                        last_progress_update_count,
4509                                        last_progress_update_count + 1,
4510                                        SeqCst,
4511                                        SeqCst
4512                                    ) {
4513                                        Ok(_) => {
4514                                            last_progress_update_count += 1;
4515                                            self.send_status_update(true, SmallVec::new());
4516                                        }
4517                                        Err(count) => {
4518                                            last_progress_update_count = count;
4519                                        }
4520                                    }
4521                                    progress_update_timer.set(self.progress_timer(enable_progress_updates).fuse());
4522                                }
4523
4524                                // Recursively load directories from the file system.
4525                                job = scan_jobs_rx.recv().fuse() => {
4526                                    let Ok(job) = job else { break };
4527                                    if let Err(err) = self.scan_dir(&job).await {
4528                                        if job.path.as_ref() != Path::new("") {
4529                                            log::error!("error scanning directory {:?}: {}", job.abs_path, err);
4530                                        }
4531                                    }
4532                                }
4533                            }
4534                        }
4535                    })
4536                }
4537            })
4538            .await;
4539    }
4540
4541    fn send_status_update(&self, scanning: bool, barrier: SmallVec<[barrier::Sender; 1]>) -> bool {
4542        let mut state = self.state.lock();
4543        if state.changed_paths.is_empty() && scanning {
4544            return true;
4545        }
4546
4547        let new_snapshot = state.snapshot.clone();
4548        let old_snapshot = mem::replace(&mut state.prev_snapshot, new_snapshot.snapshot.clone());
4549        let changes = self.build_change_set(&old_snapshot, &new_snapshot, &state.changed_paths);
4550        state.changed_paths.clear();
4551
4552        self.status_updates_tx
4553            .unbounded_send(ScanState::Updated {
4554                snapshot: new_snapshot,
4555                changes,
4556                scanning,
4557                barrier,
4558            })
4559            .is_ok()
4560    }
4561
4562    async fn scan_dir(&self, job: &ScanJob) -> Result<()> {
4563        let root_abs_path;
4564        let root_char_bag;
4565        {
4566            let snapshot = &self.state.lock().snapshot;
4567            if self.settings.is_path_excluded(&job.path) {
4568                log::error!("skipping excluded directory {:?}", job.path);
4569                return Ok(());
4570            }
4571            log::debug!("scanning directory {:?}", job.path);
4572            root_abs_path = snapshot.abs_path().clone();
4573            root_char_bag = snapshot.root_char_bag;
4574        }
4575
4576        let next_entry_id = self.next_entry_id.clone();
4577        let mut ignore_stack = job.ignore_stack.clone();
4578        let mut new_ignore = None;
4579        let mut root_canonical_path = None;
4580        let mut new_entries: Vec<Entry> = Vec::new();
4581        let mut new_jobs: Vec<Option<ScanJob>> = Vec::new();
4582        let mut child_paths = self
4583            .fs
4584            .read_dir(&job.abs_path)
4585            .await?
4586            .filter_map(|entry| async {
4587                match entry {
4588                    Ok(entry) => Some(entry),
4589                    Err(error) => {
4590                        log::error!("error processing entry {:?}", error);
4591                        None
4592                    }
4593                }
4594            })
4595            .collect::<Vec<_>>()
4596            .await;
4597
4598        // Ensure that .git and .gitignore are processed first.
4599        swap_to_front(&mut child_paths, *GITIGNORE);
4600        swap_to_front(&mut child_paths, *DOT_GIT);
4601
4602        for child_abs_path in child_paths {
4603            let child_abs_path: Arc<Path> = child_abs_path.into();
4604            let child_name = child_abs_path.file_name().unwrap();
4605            let child_path: Arc<Path> = job.path.join(child_name).into();
4606
4607            if child_name == *DOT_GIT {
4608                let repo = self.state.lock().insert_git_repository(
4609                    child_path.clone(),
4610                    self.fs.as_ref(),
4611                    self.watcher.as_ref(),
4612                );
4613
4614                if let Some(local_repo) = repo {
4615                    self.update_git_statuses(UpdateGitStatusesJob {
4616                        local_repository: local_repo,
4617                    });
4618                }
4619            } else if child_name == *GITIGNORE {
4620                match build_gitignore(&child_abs_path, self.fs.as_ref()).await {
4621                    Ok(ignore) => {
4622                        let ignore = Arc::new(ignore);
4623                        ignore_stack = ignore_stack.append(job.abs_path.clone(), ignore.clone());
4624                        new_ignore = Some(ignore);
4625                    }
4626                    Err(error) => {
4627                        log::error!(
4628                            "error loading .gitignore file {:?} - {:?}",
4629                            child_name,
4630                            error
4631                        );
4632                    }
4633                }
4634            }
4635
4636            if self.settings.is_path_excluded(&child_path) {
4637                log::debug!("skipping excluded child entry {child_path:?}");
4638                self.state.lock().remove_path(&child_path);
4639                continue;
4640            }
4641
4642            let child_metadata = match self.fs.metadata(&child_abs_path).await {
4643                Ok(Some(metadata)) => metadata,
4644                Ok(None) => continue,
4645                Err(err) => {
4646                    log::error!("error processing {child_abs_path:?}: {err:?}");
4647                    continue;
4648                }
4649            };
4650
4651            let mut child_entry = Entry::new(
4652                child_path.clone(),
4653                &child_metadata,
4654                &next_entry_id,
4655                root_char_bag,
4656                None,
4657            );
4658
4659            if job.is_external {
4660                child_entry.is_external = true;
4661            } else if child_metadata.is_symlink {
4662                let canonical_path = match self.fs.canonicalize(&child_abs_path).await {
4663                    Ok(path) => path,
4664                    Err(err) => {
4665                        log::error!(
4666                            "error reading target of symlink {:?}: {:?}",
4667                            child_abs_path,
4668                            err
4669                        );
4670                        continue;
4671                    }
4672                };
4673
4674                // lazily canonicalize the root path in order to determine if
4675                // symlinks point outside of the worktree.
4676                let root_canonical_path = match &root_canonical_path {
4677                    Some(path) => path,
4678                    None => match self.fs.canonicalize(&root_abs_path).await {
4679                        Ok(path) => root_canonical_path.insert(path),
4680                        Err(err) => {
4681                            log::error!("error canonicalizing root {:?}: {:?}", root_abs_path, err);
4682                            continue;
4683                        }
4684                    },
4685                };
4686
4687                if !canonical_path.starts_with(root_canonical_path) {
4688                    child_entry.is_external = true;
4689                }
4690
4691                child_entry.canonical_path = Some(canonical_path.into());
4692            }
4693
4694            if child_entry.is_dir() {
4695                child_entry.is_ignored = ignore_stack.is_abs_path_ignored(&child_abs_path, true);
4696                child_entry.is_always_included = self.settings.is_path_always_included(&child_path);
4697
4698                // Avoid recursing until crash in the case of a recursive symlink
4699                if job.ancestor_inodes.contains(&child_entry.inode) {
4700                    new_jobs.push(None);
4701                } else {
4702                    let mut ancestor_inodes = job.ancestor_inodes.clone();
4703                    ancestor_inodes.insert(child_entry.inode);
4704
4705                    new_jobs.push(Some(ScanJob {
4706                        abs_path: child_abs_path.clone(),
4707                        path: child_path,
4708                        is_external: child_entry.is_external,
4709                        ignore_stack: if child_entry.is_ignored {
4710                            IgnoreStack::all()
4711                        } else {
4712                            ignore_stack.clone()
4713                        },
4714                        ancestor_inodes,
4715                        scan_queue: job.scan_queue.clone(),
4716                    }));
4717                }
4718            } else {
4719                child_entry.is_ignored = ignore_stack.is_abs_path_ignored(&child_abs_path, false);
4720                child_entry.is_always_included = self.settings.is_path_always_included(&child_path);
4721            }
4722
4723            {
4724                let relative_path = job.path.join(child_name);
4725                if self.is_path_private(&relative_path) {
4726                    log::debug!("detected private file: {relative_path:?}");
4727                    child_entry.is_private = true;
4728                }
4729            }
4730
4731            new_entries.push(child_entry);
4732        }
4733
4734        let mut state = self.state.lock();
4735
4736        // Identify any subdirectories that should not be scanned.
4737        let mut job_ix = 0;
4738        for entry in &mut new_entries {
4739            state.reuse_entry_id(entry);
4740            if entry.is_dir() {
4741                if state.should_scan_directory(entry) {
4742                    job_ix += 1;
4743                } else {
4744                    log::debug!("defer scanning directory {:?}", entry.path);
4745                    entry.kind = EntryKind::UnloadedDir;
4746                    new_jobs.remove(job_ix);
4747                }
4748            }
4749            if entry.is_always_included {
4750                state
4751                    .snapshot
4752                    .always_included_entries
4753                    .push(entry.path.clone());
4754            }
4755        }
4756
4757        state.populate_dir(&job.path, new_entries, new_ignore);
4758        self.watcher.add(job.abs_path.as_ref()).log_err();
4759
4760        for new_job in new_jobs.into_iter().flatten() {
4761            job.scan_queue
4762                .try_send(new_job)
4763                .expect("channel is unbounded");
4764        }
4765
4766        Ok(())
4767    }
4768
4769    /// All list arguments should be sorted before calling this function
4770    async fn reload_entries_for_paths(
4771        &self,
4772        root_abs_path: SanitizedPath,
4773        root_canonical_path: SanitizedPath,
4774        relative_paths: &[Arc<Path>],
4775        abs_paths: Vec<PathBuf>,
4776        scan_queue_tx: Option<Sender<ScanJob>>,
4777    ) {
4778        // grab metadata for all requested paths
4779        let metadata = futures::future::join_all(
4780            abs_paths
4781                .iter()
4782                .map(|abs_path| async move {
4783                    let metadata = self.fs.metadata(abs_path).await?;
4784                    if let Some(metadata) = metadata {
4785                        let canonical_path = self.fs.canonicalize(abs_path).await?;
4786
4787                        // If we're on a case-insensitive filesystem (default on macOS), we want
4788                        // to only ignore metadata for non-symlink files if their absolute-path matches
4789                        // the canonical-path.
4790                        // Because if not, this might be a case-only-renaming (`mv test.txt TEST.TXT`)
4791                        // and we want to ignore the metadata for the old path (`test.txt`) so it's
4792                        // treated as removed.
4793                        if !self.fs_case_sensitive && !metadata.is_symlink {
4794                            let canonical_file_name = canonical_path.file_name();
4795                            let file_name = abs_path.file_name();
4796                            if canonical_file_name != file_name {
4797                                return Ok(None);
4798                            }
4799                        }
4800
4801                        anyhow::Ok(Some((metadata, SanitizedPath::from(canonical_path))))
4802                    } else {
4803                        Ok(None)
4804                    }
4805                })
4806                .collect::<Vec<_>>(),
4807        )
4808        .await;
4809
4810        let mut state = self.state.lock();
4811        let doing_recursive_update = scan_queue_tx.is_some();
4812
4813        // Remove any entries for paths that no longer exist or are being recursively
4814        // refreshed. Do this before adding any new entries, so that renames can be
4815        // detected regardless of the order of the paths.
4816        for (path, metadata) in relative_paths.iter().zip(metadata.iter()) {
4817            if matches!(metadata, Ok(None)) || doing_recursive_update {
4818                log::trace!("remove path {:?}", path);
4819                state.remove_path(path);
4820            }
4821        }
4822
4823        // Group all relative paths by their git repository.
4824        let mut paths_by_git_repo = HashMap::default();
4825        for relative_path in relative_paths.iter() {
4826            let repository_data = state
4827                .snapshot
4828                .local_repo_for_path(relative_path)
4829                .zip(state.snapshot.repository_for_path(relative_path));
4830            if let Some((local_repo, entry)) = repository_data {
4831                if let Ok(repo_path) = local_repo.relativize(relative_path) {
4832                    paths_by_git_repo
4833                        .entry(local_repo.work_directory.clone())
4834                        .or_insert_with(|| RepoPaths {
4835                            entry: entry.clone(),
4836                            repo: local_repo.repo_ptr.clone(),
4837                            repo_paths: Default::default(),
4838                        })
4839                        .add_path(repo_path);
4840                }
4841            }
4842        }
4843
4844        for (work_directory, mut paths) in paths_by_git_repo {
4845            if let Ok(status) = paths.repo.status(&paths.repo_paths) {
4846                let mut changed_path_statuses = Vec::new();
4847                let statuses = paths.entry.statuses_by_path.clone();
4848                let mut cursor = statuses.cursor::<PathProgress>(&());
4849
4850                for (repo_path, status) in &*status.entries {
4851                    paths.remove_repo_path(repo_path);
4852                    if cursor.seek_forward(&PathTarget::Path(repo_path), Bias::Left, &()) {
4853                        if &cursor.item().unwrap().status == status {
4854                            continue;
4855                        }
4856                    }
4857
4858                    changed_path_statuses.push(Edit::Insert(StatusEntry {
4859                        repo_path: repo_path.clone(),
4860                        status: *status,
4861                    }));
4862                }
4863
4864                let mut cursor = statuses.cursor::<PathProgress>(&());
4865                for path in paths.repo_paths {
4866                    if cursor.seek_forward(&PathTarget::Path(&path), Bias::Left, &()) {
4867                        changed_path_statuses.push(Edit::Remove(PathKey(path.0)));
4868                    }
4869                }
4870
4871                if !changed_path_statuses.is_empty() {
4872                    let work_directory_id = state.snapshot.repositories.update(
4873                        &work_directory.path_key(),
4874                        &(),
4875                        move |repository_entry| {
4876                            repository_entry
4877                                .statuses_by_path
4878                                .edit(changed_path_statuses, &());
4879
4880                            repository_entry.work_directory_id
4881                        },
4882                    );
4883
4884                    if let Some(work_directory_id) = work_directory_id {
4885                        let scan_id = state.snapshot.scan_id;
4886                        state.snapshot.git_repositories.update(
4887                            &work_directory_id,
4888                            |local_repository_entry| {
4889                                local_repository_entry.status_scan_id = scan_id;
4890                            },
4891                        );
4892                    }
4893                }
4894            }
4895        }
4896
4897        for (path, metadata) in relative_paths.iter().zip(metadata.into_iter()) {
4898            let abs_path: Arc<Path> = root_abs_path.as_path().join(path).into();
4899            match metadata {
4900                Ok(Some((metadata, canonical_path))) => {
4901                    let ignore_stack = state
4902                        .snapshot
4903                        .ignore_stack_for_abs_path(&abs_path, metadata.is_dir);
4904                    let is_external = !canonical_path.starts_with(&root_canonical_path);
4905                    let mut fs_entry = Entry::new(
4906                        path.clone(),
4907                        &metadata,
4908                        self.next_entry_id.as_ref(),
4909                        state.snapshot.root_char_bag,
4910                        if metadata.is_symlink {
4911                            Some(canonical_path.as_path().to_path_buf().into())
4912                        } else {
4913                            None
4914                        },
4915                    );
4916
4917                    let is_dir = fs_entry.is_dir();
4918                    fs_entry.is_ignored = ignore_stack.is_abs_path_ignored(&abs_path, is_dir);
4919                    fs_entry.is_external = is_external;
4920                    fs_entry.is_private = self.is_path_private(path);
4921                    fs_entry.is_always_included = self.settings.is_path_always_included(path);
4922
4923                    if let (Some(scan_queue_tx), true) = (&scan_queue_tx, is_dir) {
4924                        if state.should_scan_directory(&fs_entry)
4925                            || (fs_entry.path.as_os_str().is_empty()
4926                                && abs_path.file_name() == Some(*DOT_GIT))
4927                        {
4928                            state.enqueue_scan_dir(abs_path, &fs_entry, scan_queue_tx);
4929                        } else {
4930                            fs_entry.kind = EntryKind::UnloadedDir;
4931                        }
4932                    }
4933
4934                    state.insert_entry(fs_entry.clone(), self.fs.as_ref(), self.watcher.as_ref());
4935                }
4936                Ok(None) => {
4937                    self.remove_repo_path(path, &mut state.snapshot);
4938                }
4939                Err(err) => {
4940                    log::error!("error reading file {abs_path:?} on event: {err:#}");
4941                }
4942            }
4943        }
4944
4945        util::extend_sorted(
4946            &mut state.changed_paths,
4947            relative_paths.iter().cloned(),
4948            usize::MAX,
4949            Ord::cmp,
4950        );
4951    }
4952
4953    fn remove_repo_path(&self, path: &Arc<Path>, snapshot: &mut LocalSnapshot) -> Option<()> {
4954        if !path
4955            .components()
4956            .any(|component| component.as_os_str() == *DOT_GIT)
4957        {
4958            if let Some(repository) = snapshot.repository(PathKey(path.clone())) {
4959                snapshot
4960                    .git_repositories
4961                    .remove(&repository.work_directory_id);
4962                snapshot
4963                    .snapshot
4964                    .repositories
4965                    .remove(&PathKey(repository.work_directory.path.clone()), &());
4966                return Some(());
4967            }
4968        }
4969
4970        Some(())
4971    }
4972
4973    async fn update_ignore_statuses(&self, scan_job_tx: Sender<ScanJob>) {
4974        use futures::FutureExt as _;
4975
4976        let mut ignores_to_update = Vec::new();
4977        let (ignore_queue_tx, ignore_queue_rx) = channel::unbounded();
4978        let prev_snapshot;
4979        {
4980            let snapshot = &mut self.state.lock().snapshot;
4981            let abs_path = snapshot.abs_path.clone();
4982            snapshot
4983                .ignores_by_parent_abs_path
4984                .retain(|parent_abs_path, (_, needs_update)| {
4985                    if let Ok(parent_path) = parent_abs_path.strip_prefix(abs_path.as_path()) {
4986                        if *needs_update {
4987                            *needs_update = false;
4988                            if snapshot.snapshot.entry_for_path(parent_path).is_some() {
4989                                ignores_to_update.push(parent_abs_path.clone());
4990                            }
4991                        }
4992
4993                        let ignore_path = parent_path.join(*GITIGNORE);
4994                        if snapshot.snapshot.entry_for_path(ignore_path).is_none() {
4995                            return false;
4996                        }
4997                    }
4998                    true
4999                });
5000
5001            ignores_to_update.sort_unstable();
5002            let mut ignores_to_update = ignores_to_update.into_iter().peekable();
5003            while let Some(parent_abs_path) = ignores_to_update.next() {
5004                while ignores_to_update
5005                    .peek()
5006                    .map_or(false, |p| p.starts_with(&parent_abs_path))
5007                {
5008                    ignores_to_update.next().unwrap();
5009                }
5010
5011                let ignore_stack = snapshot.ignore_stack_for_abs_path(&parent_abs_path, true);
5012                ignore_queue_tx
5013                    .send_blocking(UpdateIgnoreStatusJob {
5014                        abs_path: parent_abs_path,
5015                        ignore_stack,
5016                        ignore_queue: ignore_queue_tx.clone(),
5017                        scan_queue: scan_job_tx.clone(),
5018                    })
5019                    .unwrap();
5020            }
5021
5022            prev_snapshot = snapshot.clone();
5023        }
5024        drop(ignore_queue_tx);
5025
5026        self.executor
5027            .scoped(|scope| {
5028                for _ in 0..self.executor.num_cpus() {
5029                    scope.spawn(async {
5030                        loop {
5031                            select_biased! {
5032                                // Process any path refresh requests before moving on to process
5033                                // the queue of ignore statuses.
5034                                request = self.next_scan_request().fuse() => {
5035                                    let Ok(request) = request else { break };
5036                                    if !self.process_scan_request(request, true).await {
5037                                        return;
5038                                    }
5039                                }
5040
5041                                // Recursively process directories whose ignores have changed.
5042                                job = ignore_queue_rx.recv().fuse() => {
5043                                    let Ok(job) = job else { break };
5044                                    self.update_ignore_status(job, &prev_snapshot).await;
5045                                }
5046                            }
5047                        }
5048                    });
5049                }
5050            })
5051            .await;
5052    }
5053
5054    async fn update_ignore_status(&self, job: UpdateIgnoreStatusJob, snapshot: &LocalSnapshot) {
5055        log::trace!("update ignore status {:?}", job.abs_path);
5056
5057        let mut ignore_stack = job.ignore_stack;
5058        if let Some((ignore, _)) = snapshot.ignores_by_parent_abs_path.get(&job.abs_path) {
5059            ignore_stack = ignore_stack.append(job.abs_path.clone(), ignore.clone());
5060        }
5061
5062        let mut entries_by_id_edits = Vec::new();
5063        let mut entries_by_path_edits = Vec::new();
5064        let path = job
5065            .abs_path
5066            .strip_prefix(snapshot.abs_path.as_path())
5067            .unwrap();
5068
5069        for mut entry in snapshot.child_entries(path).cloned() {
5070            let was_ignored = entry.is_ignored;
5071            let abs_path: Arc<Path> = snapshot.abs_path().join(&entry.path).into();
5072            entry.is_ignored = ignore_stack.is_abs_path_ignored(&abs_path, entry.is_dir());
5073
5074            if entry.is_dir() {
5075                let child_ignore_stack = if entry.is_ignored {
5076                    IgnoreStack::all()
5077                } else {
5078                    ignore_stack.clone()
5079                };
5080
5081                // Scan any directories that were previously ignored and weren't previously scanned.
5082                if was_ignored && !entry.is_ignored && entry.kind.is_unloaded() {
5083                    let state = self.state.lock();
5084                    if state.should_scan_directory(&entry) {
5085                        state.enqueue_scan_dir(abs_path.clone(), &entry, &job.scan_queue);
5086                    }
5087                }
5088
5089                job.ignore_queue
5090                    .send(UpdateIgnoreStatusJob {
5091                        abs_path: abs_path.clone(),
5092                        ignore_stack: child_ignore_stack,
5093                        ignore_queue: job.ignore_queue.clone(),
5094                        scan_queue: job.scan_queue.clone(),
5095                    })
5096                    .await
5097                    .unwrap();
5098            }
5099
5100            if entry.is_ignored != was_ignored {
5101                let mut path_entry = snapshot.entries_by_id.get(&entry.id, &()).unwrap().clone();
5102                path_entry.scan_id = snapshot.scan_id;
5103                path_entry.is_ignored = entry.is_ignored;
5104                entries_by_id_edits.push(Edit::Insert(path_entry));
5105                entries_by_path_edits.push(Edit::Insert(entry));
5106            }
5107        }
5108
5109        let state = &mut self.state.lock();
5110        for edit in &entries_by_path_edits {
5111            if let Edit::Insert(entry) = edit {
5112                if let Err(ix) = state.changed_paths.binary_search(&entry.path) {
5113                    state.changed_paths.insert(ix, entry.path.clone());
5114                }
5115            }
5116        }
5117
5118        state
5119            .snapshot
5120            .entries_by_path
5121            .edit(entries_by_path_edits, &());
5122        state.snapshot.entries_by_id.edit(entries_by_id_edits, &());
5123    }
5124
5125    async fn update_git_repositories(&self, dot_git_paths: Vec<PathBuf>) {
5126        log::debug!("reloading repositories: {dot_git_paths:?}");
5127
5128        let mut repo_updates = Vec::new();
5129        {
5130            let mut state = self.state.lock();
5131            let scan_id = state.snapshot.scan_id;
5132            for dot_git_dir in dot_git_paths {
5133                let existing_repository_entry =
5134                    state
5135                        .snapshot
5136                        .git_repositories
5137                        .iter()
5138                        .find_map(|(entry_id, repo)| {
5139                            if repo.dot_git_dir_abs_path.as_ref() == &dot_git_dir
5140                                || repo.dot_git_worktree_abs_path.as_deref() == Some(&dot_git_dir)
5141                            {
5142                                Some((*entry_id, repo.clone()))
5143                            } else {
5144                                None
5145                            }
5146                        });
5147
5148                let local_repository = match existing_repository_entry {
5149                    None => {
5150                        match state.insert_git_repository(
5151                            dot_git_dir.into(),
5152                            self.fs.as_ref(),
5153                            self.watcher.as_ref(),
5154                        ) {
5155                            Some(output) => output,
5156                            None => continue,
5157                        }
5158                    }
5159                    Some((entry_id, local_repository)) => {
5160                        if local_repository.git_dir_scan_id == scan_id {
5161                            continue;
5162                        }
5163                        let Some(work_dir) = state
5164                            .snapshot
5165                            .entry_for_id(entry_id)
5166                            .map(|entry| entry.path.clone())
5167                        else {
5168                            continue;
5169                        };
5170
5171                        let branch = local_repository.repo_ptr.branch_name();
5172                        local_repository.repo_ptr.reload_index();
5173
5174                        state.snapshot.git_repositories.update(&entry_id, |entry| {
5175                            entry.git_dir_scan_id = scan_id;
5176                            entry.status_scan_id = scan_id;
5177                        });
5178                        state.snapshot.snapshot.repositories.update(
5179                            &PathKey(work_dir.clone()),
5180                            &(),
5181                            |entry| entry.branch = branch.map(Into::into),
5182                        );
5183
5184                        local_repository
5185                    }
5186                };
5187
5188                repo_updates.push(UpdateGitStatusesJob { local_repository });
5189            }
5190
5191            // Remove any git repositories whose .git entry no longer exists.
5192            let snapshot = &mut state.snapshot;
5193            let mut ids_to_preserve = HashSet::default();
5194            for (&work_directory_id, entry) in snapshot.git_repositories.iter() {
5195                let exists_in_snapshot = snapshot
5196                    .entry_for_id(work_directory_id)
5197                    .map_or(false, |entry| {
5198                        snapshot.entry_for_path(entry.path.join(*DOT_GIT)).is_some()
5199                    });
5200
5201                if exists_in_snapshot
5202                    || matches!(
5203                        smol::block_on(self.fs.metadata(&entry.dot_git_dir_abs_path)),
5204                        Ok(Some(_))
5205                    )
5206                {
5207                    ids_to_preserve.insert(work_directory_id);
5208                }
5209            }
5210
5211            snapshot
5212                .git_repositories
5213                .retain(|work_directory_id, _| ids_to_preserve.contains(work_directory_id));
5214            snapshot.repositories.retain(&(), |entry| {
5215                ids_to_preserve.contains(&entry.work_directory_id)
5216            });
5217        }
5218
5219        let (mut updates_done_tx, mut updates_done_rx) = barrier::channel();
5220        self.executor
5221            .scoped(|scope| {
5222                scope.spawn(async {
5223                    for repo_update in repo_updates {
5224                        self.update_git_statuses(repo_update);
5225                    }
5226                    updates_done_tx.blocking_send(()).ok();
5227                });
5228
5229                scope.spawn(async {
5230                    loop {
5231                        select_biased! {
5232                            // Process any path refresh requests before moving on to process
5233                            // the queue of git statuses.
5234                            request = self.next_scan_request().fuse() => {
5235                                let Ok(request) = request else { break };
5236                                if !self.process_scan_request(request, true).await {
5237                                    return;
5238                                }
5239                            }
5240                            _ = updates_done_rx.recv().fuse() =>  break,
5241                        }
5242                    }
5243                });
5244            })
5245            .await;
5246    }
5247
5248    /// Update the git statuses for a given batch of entries.
5249    fn update_git_statuses(&self, job: UpdateGitStatusesJob) {
5250        log::trace!(
5251            "updating git statuses for repo {:?}",
5252            job.local_repository.work_directory.path
5253        );
5254        let t0 = Instant::now();
5255
5256        let Some(statuses) = job
5257            .local_repository
5258            .repo()
5259            .status(&[git::WORK_DIRECTORY_REPO_PATH.clone()])
5260            .log_err()
5261        else {
5262            return;
5263        };
5264        log::trace!(
5265            "computed git statuses for repo {:?} in {:?}",
5266            job.local_repository.work_directory.path,
5267            t0.elapsed()
5268        );
5269
5270        let t0 = Instant::now();
5271        let mut changed_paths = Vec::new();
5272        let snapshot = self.state.lock().snapshot.snapshot.clone();
5273
5274        let Some(mut repository) =
5275            snapshot.repository(job.local_repository.work_directory.path_key())
5276        else {
5277            log::error!("Got an UpdateGitStatusesJob for a repository that isn't in the snapshot");
5278            debug_assert!(false);
5279            return;
5280        };
5281
5282        let mut new_entries_by_path = SumTree::new(&());
5283        for (repo_path, status) in statuses.entries.iter() {
5284            let project_path = repository.work_directory.unrelativize(repo_path);
5285
5286            new_entries_by_path.insert_or_replace(
5287                StatusEntry {
5288                    repo_path: repo_path.clone(),
5289                    status: *status,
5290                },
5291                &(),
5292            );
5293
5294            if let Some(path) = project_path {
5295                changed_paths.push(path);
5296            }
5297        }
5298
5299        repository.statuses_by_path = new_entries_by_path;
5300        let mut state = self.state.lock();
5301        state
5302            .snapshot
5303            .repositories
5304            .insert_or_replace(repository, &());
5305
5306        util::extend_sorted(
5307            &mut state.changed_paths,
5308            changed_paths,
5309            usize::MAX,
5310            Ord::cmp,
5311        );
5312
5313        log::trace!(
5314            "applied git status updates for repo {:?} in {:?}",
5315            job.local_repository.work_directory.path,
5316            t0.elapsed(),
5317        );
5318    }
5319
5320    fn build_change_set(
5321        &self,
5322        old_snapshot: &Snapshot,
5323        new_snapshot: &Snapshot,
5324        event_paths: &[Arc<Path>],
5325    ) -> UpdatedEntriesSet {
5326        use BackgroundScannerPhase::*;
5327        use PathChange::{Added, AddedOrUpdated, Loaded, Removed, Updated};
5328
5329        // Identify which paths have changed. Use the known set of changed
5330        // parent paths to optimize the search.
5331        let mut changes = Vec::new();
5332        let mut old_paths = old_snapshot.entries_by_path.cursor::<PathKey>(&());
5333        let mut new_paths = new_snapshot.entries_by_path.cursor::<PathKey>(&());
5334        let mut last_newly_loaded_dir_path = None;
5335        old_paths.next(&());
5336        new_paths.next(&());
5337        for path in event_paths {
5338            let path = PathKey(path.clone());
5339            if old_paths.item().map_or(false, |e| e.path < path.0) {
5340                old_paths.seek_forward(&path, Bias::Left, &());
5341            }
5342            if new_paths.item().map_or(false, |e| e.path < path.0) {
5343                new_paths.seek_forward(&path, Bias::Left, &());
5344            }
5345            loop {
5346                match (old_paths.item(), new_paths.item()) {
5347                    (Some(old_entry), Some(new_entry)) => {
5348                        if old_entry.path > path.0
5349                            && new_entry.path > path.0
5350                            && !old_entry.path.starts_with(&path.0)
5351                            && !new_entry.path.starts_with(&path.0)
5352                        {
5353                            break;
5354                        }
5355
5356                        match Ord::cmp(&old_entry.path, &new_entry.path) {
5357                            Ordering::Less => {
5358                                changes.push((old_entry.path.clone(), old_entry.id, Removed));
5359                                old_paths.next(&());
5360                            }
5361                            Ordering::Equal => {
5362                                if self.phase == EventsReceivedDuringInitialScan {
5363                                    if old_entry.id != new_entry.id {
5364                                        changes.push((
5365                                            old_entry.path.clone(),
5366                                            old_entry.id,
5367                                            Removed,
5368                                        ));
5369                                    }
5370                                    // If the worktree was not fully initialized when this event was generated,
5371                                    // we can't know whether this entry was added during the scan or whether
5372                                    // it was merely updated.
5373                                    changes.push((
5374                                        new_entry.path.clone(),
5375                                        new_entry.id,
5376                                        AddedOrUpdated,
5377                                    ));
5378                                } else if old_entry.id != new_entry.id {
5379                                    changes.push((old_entry.path.clone(), old_entry.id, Removed));
5380                                    changes.push((new_entry.path.clone(), new_entry.id, Added));
5381                                } else if old_entry != new_entry {
5382                                    if old_entry.kind.is_unloaded() {
5383                                        last_newly_loaded_dir_path = Some(&new_entry.path);
5384                                        changes.push((
5385                                            new_entry.path.clone(),
5386                                            new_entry.id,
5387                                            Loaded,
5388                                        ));
5389                                    } else {
5390                                        changes.push((
5391                                            new_entry.path.clone(),
5392                                            new_entry.id,
5393                                            Updated,
5394                                        ));
5395                                    }
5396                                }
5397                                old_paths.next(&());
5398                                new_paths.next(&());
5399                            }
5400                            Ordering::Greater => {
5401                                let is_newly_loaded = self.phase == InitialScan
5402                                    || last_newly_loaded_dir_path
5403                                        .as_ref()
5404                                        .map_or(false, |dir| new_entry.path.starts_with(dir));
5405                                changes.push((
5406                                    new_entry.path.clone(),
5407                                    new_entry.id,
5408                                    if is_newly_loaded { Loaded } else { Added },
5409                                ));
5410                                new_paths.next(&());
5411                            }
5412                        }
5413                    }
5414                    (Some(old_entry), None) => {
5415                        changes.push((old_entry.path.clone(), old_entry.id, Removed));
5416                        old_paths.next(&());
5417                    }
5418                    (None, Some(new_entry)) => {
5419                        let is_newly_loaded = self.phase == InitialScan
5420                            || last_newly_loaded_dir_path
5421                                .as_ref()
5422                                .map_or(false, |dir| new_entry.path.starts_with(dir));
5423                        changes.push((
5424                            new_entry.path.clone(),
5425                            new_entry.id,
5426                            if is_newly_loaded { Loaded } else { Added },
5427                        ));
5428                        new_paths.next(&());
5429                    }
5430                    (None, None) => break,
5431                }
5432            }
5433        }
5434
5435        changes.into()
5436    }
5437
5438    async fn progress_timer(&self, running: bool) {
5439        if !running {
5440            return futures::future::pending().await;
5441        }
5442
5443        #[cfg(any(test, feature = "test-support"))]
5444        if self.fs.is_fake() {
5445            return self.executor.simulate_random_delay().await;
5446        }
5447
5448        smol::Timer::after(FS_WATCH_LATENCY).await;
5449    }
5450
5451    fn is_path_private(&self, path: &Path) -> bool {
5452        !self.share_private_files && self.settings.is_path_private(path)
5453    }
5454
5455    async fn next_scan_request(&self) -> Result<ScanRequest> {
5456        let mut request = self.scan_requests_rx.recv().await?;
5457        while let Ok(next_request) = self.scan_requests_rx.try_recv() {
5458            request.relative_paths.extend(next_request.relative_paths);
5459            request.done.extend(next_request.done);
5460        }
5461        Ok(request)
5462    }
5463}
5464
5465fn swap_to_front(child_paths: &mut Vec<PathBuf>, file: &OsStr) {
5466    let position = child_paths
5467        .iter()
5468        .position(|path| path.file_name().unwrap() == file);
5469    if let Some(position) = position {
5470        let temp = child_paths.remove(position);
5471        child_paths.insert(0, temp);
5472    }
5473}
5474
5475fn char_bag_for_path(root_char_bag: CharBag, path: &Path) -> CharBag {
5476    let mut result = root_char_bag;
5477    result.extend(
5478        path.to_string_lossy()
5479            .chars()
5480            .map(|c| c.to_ascii_lowercase()),
5481    );
5482    result
5483}
5484
5485#[derive(Debug)]
5486struct RepoPaths {
5487    repo: Arc<dyn GitRepository>,
5488    entry: RepositoryEntry,
5489    // sorted
5490    repo_paths: Vec<RepoPath>,
5491}
5492
5493impl RepoPaths {
5494    fn add_path(&mut self, repo_path: RepoPath) {
5495        match self.repo_paths.binary_search(&repo_path) {
5496            Ok(_) => {}
5497            Err(ix) => self.repo_paths.insert(ix, repo_path),
5498        }
5499    }
5500
5501    fn remove_repo_path(&mut self, repo_path: &RepoPath) {
5502        match self.repo_paths.binary_search(&repo_path) {
5503            Ok(ix) => {
5504                self.repo_paths.remove(ix);
5505            }
5506            Err(_) => {}
5507        }
5508    }
5509}
5510
5511struct ScanJob {
5512    abs_path: Arc<Path>,
5513    path: Arc<Path>,
5514    ignore_stack: Arc<IgnoreStack>,
5515    scan_queue: Sender<ScanJob>,
5516    ancestor_inodes: TreeSet<u64>,
5517    is_external: bool,
5518}
5519
5520struct UpdateIgnoreStatusJob {
5521    abs_path: Arc<Path>,
5522    ignore_stack: Arc<IgnoreStack>,
5523    ignore_queue: Sender<UpdateIgnoreStatusJob>,
5524    scan_queue: Sender<ScanJob>,
5525}
5526
5527struct UpdateGitStatusesJob {
5528    local_repository: LocalRepositoryEntry,
5529}
5530
5531pub trait WorktreeModelHandle {
5532    #[cfg(any(test, feature = "test-support"))]
5533    fn flush_fs_events<'a>(
5534        &self,
5535        cx: &'a mut gpui::TestAppContext,
5536    ) -> futures::future::LocalBoxFuture<'a, ()>;
5537
5538    #[cfg(any(test, feature = "test-support"))]
5539    fn flush_fs_events_in_root_git_repository<'a>(
5540        &self,
5541        cx: &'a mut gpui::TestAppContext,
5542    ) -> futures::future::LocalBoxFuture<'a, ()>;
5543}
5544
5545impl WorktreeModelHandle for Entity<Worktree> {
5546    // When the worktree's FS event stream sometimes delivers "redundant" events for FS changes that
5547    // occurred before the worktree was constructed. These events can cause the worktree to perform
5548    // extra directory scans, and emit extra scan-state notifications.
5549    //
5550    // This function mutates the worktree's directory and waits for those mutations to be picked up,
5551    // to ensure that all redundant FS events have already been processed.
5552    #[cfg(any(test, feature = "test-support"))]
5553    fn flush_fs_events<'a>(
5554        &self,
5555        cx: &'a mut gpui::TestAppContext,
5556    ) -> futures::future::LocalBoxFuture<'a, ()> {
5557        let file_name = "fs-event-sentinel";
5558
5559        let tree = self.clone();
5560        let (fs, root_path) = self.update(cx, |tree, _| {
5561            let tree = tree.as_local().unwrap();
5562            (tree.fs.clone(), tree.abs_path().clone())
5563        });
5564
5565        async move {
5566            fs.create_file(&root_path.join(file_name), Default::default())
5567                .await
5568                .unwrap();
5569
5570            cx.condition(&tree, |tree, _| tree.entry_for_path(file_name).is_some())
5571                .await;
5572
5573            fs.remove_file(&root_path.join(file_name), Default::default())
5574                .await
5575                .unwrap();
5576            cx.condition(&tree, |tree, _| tree.entry_for_path(file_name).is_none())
5577                .await;
5578
5579            cx.update(|cx| tree.read(cx).as_local().unwrap().scan_complete())
5580                .await;
5581        }
5582        .boxed_local()
5583    }
5584
5585    // This function is similar to flush_fs_events, except that it waits for events to be flushed in
5586    // the .git folder of the root repository.
5587    // The reason for its existence is that a repository's .git folder might live *outside* of the
5588    // worktree and thus its FS events might go through a different path.
5589    // In order to flush those, we need to create artificial events in the .git folder and wait
5590    // for the repository to be reloaded.
5591    #[cfg(any(test, feature = "test-support"))]
5592    fn flush_fs_events_in_root_git_repository<'a>(
5593        &self,
5594        cx: &'a mut gpui::TestAppContext,
5595    ) -> futures::future::LocalBoxFuture<'a, ()> {
5596        let file_name = "fs-event-sentinel";
5597
5598        let tree = self.clone();
5599        let (fs, root_path, mut git_dir_scan_id) = self.update(cx, |tree, _| {
5600            let tree = tree.as_local().unwrap();
5601            let root_entry = tree.root_git_entry().unwrap();
5602            let local_repo_entry = tree.get_local_repo(&root_entry).unwrap();
5603            (
5604                tree.fs.clone(),
5605                local_repo_entry.dot_git_dir_abs_path.clone(),
5606                local_repo_entry.git_dir_scan_id,
5607            )
5608        });
5609
5610        let scan_id_increased = |tree: &mut Worktree, git_dir_scan_id: &mut usize| {
5611            let root_entry = tree.root_git_entry().unwrap();
5612            let local_repo_entry = tree
5613                .as_local()
5614                .unwrap()
5615                .get_local_repo(&root_entry)
5616                .unwrap();
5617
5618            if local_repo_entry.git_dir_scan_id > *git_dir_scan_id {
5619                *git_dir_scan_id = local_repo_entry.git_dir_scan_id;
5620                true
5621            } else {
5622                false
5623            }
5624        };
5625
5626        async move {
5627            fs.create_file(&root_path.join(file_name), Default::default())
5628                .await
5629                .unwrap();
5630
5631            cx.condition(&tree, |tree, _| {
5632                scan_id_increased(tree, &mut git_dir_scan_id)
5633            })
5634            .await;
5635
5636            fs.remove_file(&root_path.join(file_name), Default::default())
5637                .await
5638                .unwrap();
5639
5640            cx.condition(&tree, |tree, _| {
5641                scan_id_increased(tree, &mut git_dir_scan_id)
5642            })
5643            .await;
5644
5645            cx.update(|cx| tree.read(cx).as_local().unwrap().scan_complete())
5646                .await;
5647        }
5648        .boxed_local()
5649    }
5650}
5651
5652#[derive(Clone, Debug)]
5653struct TraversalProgress<'a> {
5654    max_path: &'a Path,
5655    count: usize,
5656    non_ignored_count: usize,
5657    file_count: usize,
5658    non_ignored_file_count: usize,
5659}
5660
5661impl<'a> TraversalProgress<'a> {
5662    fn count(&self, include_files: bool, include_dirs: bool, include_ignored: bool) -> usize {
5663        match (include_files, include_dirs, include_ignored) {
5664            (true, true, true) => self.count,
5665            (true, true, false) => self.non_ignored_count,
5666            (true, false, true) => self.file_count,
5667            (true, false, false) => self.non_ignored_file_count,
5668            (false, true, true) => self.count - self.file_count,
5669            (false, true, false) => self.non_ignored_count - self.non_ignored_file_count,
5670            (false, false, _) => 0,
5671        }
5672    }
5673}
5674
5675impl<'a> sum_tree::Dimension<'a, EntrySummary> for TraversalProgress<'a> {
5676    fn zero(_cx: &()) -> Self {
5677        Default::default()
5678    }
5679
5680    fn add_summary(&mut self, summary: &'a EntrySummary, _: &()) {
5681        self.max_path = summary.max_path.as_ref();
5682        self.count += summary.count;
5683        self.non_ignored_count += summary.non_ignored_count;
5684        self.file_count += summary.file_count;
5685        self.non_ignored_file_count += summary.non_ignored_file_count;
5686    }
5687}
5688
5689impl<'a> Default for TraversalProgress<'a> {
5690    fn default() -> Self {
5691        Self {
5692            max_path: Path::new(""),
5693            count: 0,
5694            non_ignored_count: 0,
5695            file_count: 0,
5696            non_ignored_file_count: 0,
5697        }
5698    }
5699}
5700
5701#[derive(Debug, Clone, Copy)]
5702pub struct GitEntryRef<'a> {
5703    pub entry: &'a Entry,
5704    pub git_summary: GitSummary,
5705}
5706
5707impl<'a> GitEntryRef<'a> {
5708    pub fn to_owned(&self) -> GitEntry {
5709        GitEntry {
5710            entry: self.entry.clone(),
5711            git_summary: self.git_summary,
5712        }
5713    }
5714}
5715
5716impl<'a> Deref for GitEntryRef<'a> {
5717    type Target = Entry;
5718
5719    fn deref(&self) -> &Self::Target {
5720        &self.entry
5721    }
5722}
5723
5724impl<'a> AsRef<Entry> for GitEntryRef<'a> {
5725    fn as_ref(&self) -> &Entry {
5726        self.entry
5727    }
5728}
5729
5730#[derive(Debug, Clone, PartialEq, Eq)]
5731pub struct GitEntry {
5732    pub entry: Entry,
5733    pub git_summary: GitSummary,
5734}
5735
5736impl GitEntry {
5737    pub fn to_ref(&self) -> GitEntryRef {
5738        GitEntryRef {
5739            entry: &self.entry,
5740            git_summary: self.git_summary,
5741        }
5742    }
5743}
5744
5745impl Deref for GitEntry {
5746    type Target = Entry;
5747
5748    fn deref(&self) -> &Self::Target {
5749        &self.entry
5750    }
5751}
5752
5753impl AsRef<Entry> for GitEntry {
5754    fn as_ref(&self) -> &Entry {
5755        &self.entry
5756    }
5757}
5758
5759/// Walks the worktree entries and their associated git statuses.
5760pub struct GitTraversal<'a> {
5761    traversal: Traversal<'a>,
5762    current_entry_summary: Option<GitSummary>,
5763    repo_location: Option<(
5764        &'a RepositoryEntry,
5765        Cursor<'a, StatusEntry, PathProgress<'a>>,
5766    )>,
5767}
5768
5769impl<'a> GitTraversal<'a> {
5770    fn synchronize_statuses(&mut self, reset: bool) {
5771        self.current_entry_summary = None;
5772
5773        let Some(entry) = self.traversal.cursor.item() else {
5774            return;
5775        };
5776
5777        let Some(repo) = self.traversal.snapshot.repository_for_path(&entry.path) else {
5778            self.repo_location = None;
5779            return;
5780        };
5781
5782        // Update our state if we changed repositories.
5783        if reset || self.repo_location.as_ref().map(|(prev_repo, _)| prev_repo) != Some(&repo) {
5784            self.repo_location = Some((repo, repo.statuses_by_path.cursor::<PathProgress>(&())));
5785        }
5786
5787        let Some((repo, statuses)) = &mut self.repo_location else {
5788            return;
5789        };
5790
5791        let repo_path = repo.relativize(&entry.path).unwrap();
5792
5793        if entry.is_dir() {
5794            let mut statuses = statuses.clone();
5795            statuses.seek_forward(&PathTarget::Path(repo_path.as_ref()), Bias::Left, &());
5796            let summary =
5797                statuses.summary(&PathTarget::Successor(repo_path.as_ref()), Bias::Left, &());
5798
5799            self.current_entry_summary = Some(summary);
5800        } else if entry.is_file() {
5801            // For a file entry, park the cursor on the corresponding status
5802            if statuses.seek_forward(&PathTarget::Path(repo_path.as_ref()), Bias::Left, &()) {
5803                // TODO: Investigate statuses.item() being None here.
5804                self.current_entry_summary = statuses.item().map(|item| item.status.into());
5805            } else {
5806                self.current_entry_summary = Some(GitSummary::UNCHANGED);
5807            }
5808        }
5809    }
5810
5811    pub fn advance(&mut self) -> bool {
5812        self.advance_by(1)
5813    }
5814
5815    pub fn advance_by(&mut self, count: usize) -> bool {
5816        let found = self.traversal.advance_by(count);
5817        self.synchronize_statuses(false);
5818        found
5819    }
5820
5821    pub fn advance_to_sibling(&mut self) -> bool {
5822        let found = self.traversal.advance_to_sibling();
5823        self.synchronize_statuses(false);
5824        found
5825    }
5826
5827    pub fn back_to_parent(&mut self) -> bool {
5828        let found = self.traversal.back_to_parent();
5829        self.synchronize_statuses(true);
5830        found
5831    }
5832
5833    pub fn start_offset(&self) -> usize {
5834        self.traversal.start_offset()
5835    }
5836
5837    pub fn end_offset(&self) -> usize {
5838        self.traversal.end_offset()
5839    }
5840
5841    pub fn entry(&self) -> Option<GitEntryRef<'a>> {
5842        let entry = self.traversal.cursor.item()?;
5843        let git_summary = self.current_entry_summary.unwrap_or(GitSummary::UNCHANGED);
5844        Some(GitEntryRef { entry, git_summary })
5845    }
5846}
5847
5848impl<'a> Iterator for GitTraversal<'a> {
5849    type Item = GitEntryRef<'a>;
5850    fn next(&mut self) -> Option<Self::Item> {
5851        if let Some(item) = self.entry() {
5852            self.advance();
5853            Some(item)
5854        } else {
5855            None
5856        }
5857    }
5858}
5859
5860#[derive(Debug)]
5861pub struct Traversal<'a> {
5862    snapshot: &'a Snapshot,
5863    cursor: sum_tree::Cursor<'a, Entry, TraversalProgress<'a>>,
5864    include_ignored: bool,
5865    include_files: bool,
5866    include_dirs: bool,
5867}
5868
5869impl<'a> Traversal<'a> {
5870    fn new(
5871        snapshot: &'a Snapshot,
5872        include_files: bool,
5873        include_dirs: bool,
5874        include_ignored: bool,
5875        start_path: &Path,
5876    ) -> Self {
5877        let mut cursor = snapshot.entries_by_path.cursor(&());
5878        cursor.seek(&TraversalTarget::path(start_path), Bias::Left, &());
5879        let mut traversal = Self {
5880            snapshot,
5881            cursor,
5882            include_files,
5883            include_dirs,
5884            include_ignored,
5885        };
5886        if traversal.end_offset() == traversal.start_offset() {
5887            traversal.next();
5888        }
5889        traversal
5890    }
5891
5892    pub fn with_git_statuses(self) -> GitTraversal<'a> {
5893        let mut this = GitTraversal {
5894            traversal: self,
5895            current_entry_summary: None,
5896            repo_location: None,
5897        };
5898        this.synchronize_statuses(true);
5899        this
5900    }
5901
5902    pub fn advance(&mut self) -> bool {
5903        self.advance_by(1)
5904    }
5905
5906    pub fn advance_by(&mut self, count: usize) -> bool {
5907        self.cursor.seek_forward(
5908            &TraversalTarget::Count {
5909                count: self.end_offset() + count,
5910                include_dirs: self.include_dirs,
5911                include_files: self.include_files,
5912                include_ignored: self.include_ignored,
5913            },
5914            Bias::Left,
5915            &(),
5916        )
5917    }
5918
5919    pub fn advance_to_sibling(&mut self) -> bool {
5920        while let Some(entry) = self.cursor.item() {
5921            self.cursor
5922                .seek_forward(&TraversalTarget::successor(&entry.path), Bias::Left, &());
5923            if let Some(entry) = self.cursor.item() {
5924                if (self.include_files || !entry.is_file())
5925                    && (self.include_dirs || !entry.is_dir())
5926                    && (self.include_ignored || !entry.is_ignored || entry.is_always_included)
5927                {
5928                    return true;
5929                }
5930            }
5931        }
5932        false
5933    }
5934
5935    pub fn back_to_parent(&mut self) -> bool {
5936        let Some(parent_path) = self.cursor.item().and_then(|entry| entry.path.parent()) else {
5937            return false;
5938        };
5939        self.cursor
5940            .seek(&TraversalTarget::path(parent_path), Bias::Left, &())
5941    }
5942
5943    pub fn entry(&self) -> Option<&'a Entry> {
5944        self.cursor.item()
5945    }
5946
5947    pub fn start_offset(&self) -> usize {
5948        self.cursor
5949            .start()
5950            .count(self.include_files, self.include_dirs, self.include_ignored)
5951    }
5952
5953    pub fn end_offset(&self) -> usize {
5954        self.cursor
5955            .end(&())
5956            .count(self.include_files, self.include_dirs, self.include_ignored)
5957    }
5958}
5959
5960impl<'a> Iterator for Traversal<'a> {
5961    type Item = &'a Entry;
5962
5963    fn next(&mut self) -> Option<Self::Item> {
5964        if let Some(item) = self.entry() {
5965            self.advance();
5966            Some(item)
5967        } else {
5968            None
5969        }
5970    }
5971}
5972
5973#[derive(Debug, Clone, Copy)]
5974enum PathTarget<'a> {
5975    Path(&'a Path),
5976    Successor(&'a Path),
5977    Contains(&'a Path),
5978}
5979
5980impl<'a> PathTarget<'a> {
5981    fn cmp_path(&self, other: &Path) -> Ordering {
5982        match self {
5983            PathTarget::Path(path) => path.cmp(&other),
5984            PathTarget::Successor(path) => {
5985                if other.starts_with(path) {
5986                    Ordering::Greater
5987                } else {
5988                    Ordering::Equal
5989                }
5990            }
5991            PathTarget::Contains(path) => {
5992                if path.starts_with(other) {
5993                    Ordering::Equal
5994                } else {
5995                    Ordering::Greater
5996                }
5997            }
5998        }
5999    }
6000}
6001
6002impl<'a, 'b, S: Summary> SeekTarget<'a, PathSummary<S>, PathProgress<'a>> for PathTarget<'b> {
6003    fn cmp(&self, cursor_location: &PathProgress<'a>, _: &S::Context) -> Ordering {
6004        self.cmp_path(&cursor_location.max_path)
6005    }
6006}
6007
6008impl<'a, 'b, S: Summary> SeekTarget<'a, PathSummary<S>, TraversalProgress<'a>> for PathTarget<'b> {
6009    fn cmp(&self, cursor_location: &TraversalProgress<'a>, _: &S::Context) -> Ordering {
6010        self.cmp_path(&cursor_location.max_path)
6011    }
6012}
6013
6014impl<'a, 'b> SeekTarget<'a, PathSummary<GitSummary>, (TraversalProgress<'a>, GitSummary)>
6015    for PathTarget<'b>
6016{
6017    fn cmp(&self, cursor_location: &(TraversalProgress<'a>, GitSummary), _: &()) -> Ordering {
6018        self.cmp_path(&cursor_location.0.max_path)
6019    }
6020}
6021
6022#[derive(Debug)]
6023enum TraversalTarget<'a> {
6024    Path(PathTarget<'a>),
6025    Count {
6026        count: usize,
6027        include_files: bool,
6028        include_ignored: bool,
6029        include_dirs: bool,
6030    },
6031}
6032
6033impl<'a> TraversalTarget<'a> {
6034    fn path(path: &'a Path) -> Self {
6035        Self::Path(PathTarget::Path(path))
6036    }
6037
6038    fn successor(path: &'a Path) -> Self {
6039        Self::Path(PathTarget::Successor(path))
6040    }
6041
6042    fn cmp_progress(&self, progress: &TraversalProgress) -> Ordering {
6043        match self {
6044            TraversalTarget::Path(path) => path.cmp_path(&progress.max_path),
6045            TraversalTarget::Count {
6046                count,
6047                include_files,
6048                include_dirs,
6049                include_ignored,
6050            } => Ord::cmp(
6051                count,
6052                &progress.count(*include_files, *include_dirs, *include_ignored),
6053            ),
6054        }
6055    }
6056}
6057
6058impl<'a, 'b> SeekTarget<'a, EntrySummary, TraversalProgress<'a>> for TraversalTarget<'b> {
6059    fn cmp(&self, cursor_location: &TraversalProgress<'a>, _: &()) -> Ordering {
6060        self.cmp_progress(cursor_location)
6061    }
6062}
6063
6064impl<'a, 'b> SeekTarget<'a, PathSummary<Unit>, TraversalProgress<'a>> for TraversalTarget<'b> {
6065    fn cmp(&self, cursor_location: &TraversalProgress<'a>, _: &()) -> Ordering {
6066        self.cmp_progress(cursor_location)
6067    }
6068}
6069
6070pub struct ChildEntriesOptions {
6071    pub include_files: bool,
6072    pub include_dirs: bool,
6073    pub include_ignored: bool,
6074}
6075
6076pub struct ChildEntriesIter<'a> {
6077    parent_path: &'a Path,
6078    traversal: Traversal<'a>,
6079}
6080
6081impl<'a> ChildEntriesIter<'a> {
6082    pub fn with_git_statuses(self) -> ChildEntriesGitIter<'a> {
6083        ChildEntriesGitIter {
6084            parent_path: self.parent_path,
6085            traversal: self.traversal.with_git_statuses(),
6086        }
6087    }
6088}
6089
6090pub struct ChildEntriesGitIter<'a> {
6091    parent_path: &'a Path,
6092    traversal: GitTraversal<'a>,
6093}
6094
6095impl<'a> Iterator for ChildEntriesIter<'a> {
6096    type Item = &'a Entry;
6097
6098    fn next(&mut self) -> Option<Self::Item> {
6099        if let Some(item) = self.traversal.entry() {
6100            if item.path.starts_with(self.parent_path) {
6101                self.traversal.advance_to_sibling();
6102                return Some(item);
6103            }
6104        }
6105        None
6106    }
6107}
6108
6109impl<'a> Iterator for ChildEntriesGitIter<'a> {
6110    type Item = GitEntryRef<'a>;
6111
6112    fn next(&mut self) -> Option<Self::Item> {
6113        if let Some(item) = self.traversal.entry() {
6114            if item.path.starts_with(self.parent_path) {
6115                self.traversal.advance_to_sibling();
6116                return Some(item);
6117            }
6118        }
6119        None
6120    }
6121}
6122
6123impl<'a> From<&'a Entry> for proto::Entry {
6124    fn from(entry: &'a Entry) -> Self {
6125        Self {
6126            id: entry.id.to_proto(),
6127            is_dir: entry.is_dir(),
6128            path: entry.path.to_string_lossy().into(),
6129            inode: entry.inode,
6130            mtime: entry.mtime.map(|time| time.into()),
6131            is_ignored: entry.is_ignored,
6132            is_external: entry.is_external,
6133            is_fifo: entry.is_fifo,
6134            size: Some(entry.size),
6135            canonical_path: entry
6136                .canonical_path
6137                .as_ref()
6138                .map(|path| path.to_string_lossy().to_string()),
6139        }
6140    }
6141}
6142
6143impl<'a> TryFrom<(&'a CharBag, &PathMatcher, proto::Entry)> for Entry {
6144    type Error = anyhow::Error;
6145
6146    fn try_from(
6147        (root_char_bag, always_included, entry): (&'a CharBag, &PathMatcher, proto::Entry),
6148    ) -> Result<Self> {
6149        let kind = if entry.is_dir {
6150            EntryKind::Dir
6151        } else {
6152            EntryKind::File
6153        };
6154        let path: Arc<Path> = PathBuf::from(entry.path).into();
6155        let char_bag = char_bag_for_path(*root_char_bag, &path);
6156        Ok(Entry {
6157            id: ProjectEntryId::from_proto(entry.id),
6158            kind,
6159            path: path.clone(),
6160            inode: entry.inode,
6161            mtime: entry.mtime.map(|time| time.into()),
6162            size: entry.size.unwrap_or(0),
6163            canonical_path: entry
6164                .canonical_path
6165                .map(|path_string| Box::from(Path::new(&path_string))),
6166            is_ignored: entry.is_ignored,
6167            is_always_included: always_included.is_match(path.as_ref()),
6168            is_external: entry.is_external,
6169            is_private: false,
6170            char_bag,
6171            is_fifo: entry.is_fifo,
6172        })
6173    }
6174}
6175
6176fn status_from_proto(
6177    simple_status: i32,
6178    status: Option<proto::GitFileStatus>,
6179) -> anyhow::Result<FileStatus> {
6180    use proto::git_file_status::Variant;
6181
6182    let Some(variant) = status.and_then(|status| status.variant) else {
6183        let code = proto::GitStatus::from_i32(simple_status)
6184            .ok_or_else(|| anyhow!("Invalid git status code: {simple_status}"))?;
6185        let result = match code {
6186            proto::GitStatus::Added => TrackedStatus {
6187                worktree_status: StatusCode::Added,
6188                index_status: StatusCode::Unmodified,
6189            }
6190            .into(),
6191            proto::GitStatus::Modified => TrackedStatus {
6192                worktree_status: StatusCode::Modified,
6193                index_status: StatusCode::Unmodified,
6194            }
6195            .into(),
6196            proto::GitStatus::Conflict => UnmergedStatus {
6197                first_head: UnmergedStatusCode::Updated,
6198                second_head: UnmergedStatusCode::Updated,
6199            }
6200            .into(),
6201            proto::GitStatus::Deleted => TrackedStatus {
6202                worktree_status: StatusCode::Deleted,
6203                index_status: StatusCode::Unmodified,
6204            }
6205            .into(),
6206            _ => return Err(anyhow!("Invalid code for simple status: {simple_status}")),
6207        };
6208        return Ok(result);
6209    };
6210
6211    let result = match variant {
6212        Variant::Untracked(_) => FileStatus::Untracked,
6213        Variant::Ignored(_) => FileStatus::Ignored,
6214        Variant::Unmerged(unmerged) => {
6215            let [first_head, second_head] =
6216                [unmerged.first_head, unmerged.second_head].map(|head| {
6217                    let code = proto::GitStatus::from_i32(head)
6218                        .ok_or_else(|| anyhow!("Invalid git status code: {head}"))?;
6219                    let result = match code {
6220                        proto::GitStatus::Added => UnmergedStatusCode::Added,
6221                        proto::GitStatus::Updated => UnmergedStatusCode::Updated,
6222                        proto::GitStatus::Deleted => UnmergedStatusCode::Deleted,
6223                        _ => return Err(anyhow!("Invalid code for unmerged status: {code:?}")),
6224                    };
6225                    Ok(result)
6226                });
6227            let [first_head, second_head] = [first_head?, second_head?];
6228            UnmergedStatus {
6229                first_head,
6230                second_head,
6231            }
6232            .into()
6233        }
6234        Variant::Tracked(tracked) => {
6235            let [index_status, worktree_status] = [tracked.index_status, tracked.worktree_status]
6236                .map(|status| {
6237                    let code = proto::GitStatus::from_i32(status)
6238                        .ok_or_else(|| anyhow!("Invalid git status code: {status}"))?;
6239                    let result = match code {
6240                        proto::GitStatus::Modified => StatusCode::Modified,
6241                        proto::GitStatus::TypeChanged => StatusCode::TypeChanged,
6242                        proto::GitStatus::Added => StatusCode::Added,
6243                        proto::GitStatus::Deleted => StatusCode::Deleted,
6244                        proto::GitStatus::Renamed => StatusCode::Renamed,
6245                        proto::GitStatus::Copied => StatusCode::Copied,
6246                        proto::GitStatus::Unmodified => StatusCode::Unmodified,
6247                        _ => return Err(anyhow!("Invalid code for tracked status: {code:?}")),
6248                    };
6249                    Ok(result)
6250                });
6251            let [index_status, worktree_status] = [index_status?, worktree_status?];
6252            TrackedStatus {
6253                index_status,
6254                worktree_status,
6255            }
6256            .into()
6257        }
6258    };
6259    Ok(result)
6260}
6261
6262fn status_to_proto(status: FileStatus) -> proto::GitFileStatus {
6263    use proto::git_file_status::{Tracked, Unmerged, Variant};
6264
6265    let variant = match status {
6266        FileStatus::Untracked => Variant::Untracked(Default::default()),
6267        FileStatus::Ignored => Variant::Ignored(Default::default()),
6268        FileStatus::Unmerged(UnmergedStatus {
6269            first_head,
6270            second_head,
6271        }) => Variant::Unmerged(Unmerged {
6272            first_head: unmerged_status_to_proto(first_head),
6273            second_head: unmerged_status_to_proto(second_head),
6274        }),
6275        FileStatus::Tracked(TrackedStatus {
6276            index_status,
6277            worktree_status,
6278        }) => Variant::Tracked(Tracked {
6279            index_status: tracked_status_to_proto(index_status),
6280            worktree_status: tracked_status_to_proto(worktree_status),
6281        }),
6282    };
6283    proto::GitFileStatus {
6284        variant: Some(variant),
6285    }
6286}
6287
6288fn unmerged_status_to_proto(code: UnmergedStatusCode) -> i32 {
6289    match code {
6290        UnmergedStatusCode::Added => proto::GitStatus::Added as _,
6291        UnmergedStatusCode::Deleted => proto::GitStatus::Deleted as _,
6292        UnmergedStatusCode::Updated => proto::GitStatus::Updated as _,
6293    }
6294}
6295
6296fn tracked_status_to_proto(code: StatusCode) -> i32 {
6297    match code {
6298        StatusCode::Added => proto::GitStatus::Added as _,
6299        StatusCode::Deleted => proto::GitStatus::Deleted as _,
6300        StatusCode::Modified => proto::GitStatus::Modified as _,
6301        StatusCode::Renamed => proto::GitStatus::Renamed as _,
6302        StatusCode::TypeChanged => proto::GitStatus::TypeChanged as _,
6303        StatusCode::Copied => proto::GitStatus::Copied as _,
6304        StatusCode::Unmodified => proto::GitStatus::Unmodified as _,
6305    }
6306}
6307
6308#[derive(Clone, Copy, Debug, Default, Hash, PartialEq, Eq, PartialOrd, Ord)]
6309pub struct ProjectEntryId(usize);
6310
6311impl ProjectEntryId {
6312    pub const MAX: Self = Self(usize::MAX);
6313    pub const MIN: Self = Self(usize::MIN);
6314
6315    pub fn new(counter: &AtomicUsize) -> Self {
6316        Self(counter.fetch_add(1, SeqCst))
6317    }
6318
6319    pub fn from_proto(id: u64) -> Self {
6320        Self(id as usize)
6321    }
6322
6323    pub fn to_proto(&self) -> u64 {
6324        self.0 as u64
6325    }
6326
6327    pub fn to_usize(&self) -> usize {
6328        self.0
6329    }
6330}
6331
6332#[cfg(any(test, feature = "test-support"))]
6333impl CreatedEntry {
6334    pub fn to_included(self) -> Option<Entry> {
6335        match self {
6336            CreatedEntry::Included(entry) => Some(entry),
6337            CreatedEntry::Excluded { .. } => None,
6338        }
6339    }
6340}