worktree.rs

   1mod ignore;
   2mod worktree_settings;
   3#[cfg(test)]
   4mod worktree_tests;
   5
   6use ::ignore::gitignore::{Gitignore, GitignoreBuilder};
   7use anyhow::{Context as _, Result, anyhow};
   8use clock::ReplicaId;
   9use collections::{HashMap, HashSet, VecDeque};
  10use fs::{Fs, MTime, PathEvent, RemoveOptions, Watcher, copy_recursive, read_dir_items};
  11use futures::{
  12    FutureExt as _, Stream, StreamExt,
  13    channel::{
  14        mpsc::{self, UnboundedSender},
  15        oneshot,
  16    },
  17    select_biased,
  18    task::Poll,
  19};
  20use fuzzy::CharBag;
  21use git::{
  22    COMMIT_MESSAGE, DOT_GIT, FSMONITOR_DAEMON, GITIGNORE, INDEX_LOCK, LFS_DIR,
  23    repository::RepoPath, status::GitSummary,
  24};
  25use gpui::{
  26    App, AppContext as _, AsyncApp, BackgroundExecutor, Context, Entity, EventEmitter, Task,
  27};
  28use ignore::IgnoreStack;
  29use language::DiskState;
  30
  31use parking_lot::Mutex;
  32use paths::{local_settings_folder_relative_path, local_vscode_folder_relative_path};
  33use postage::{
  34    barrier,
  35    prelude::{Sink as _, Stream as _},
  36    watch,
  37};
  38use rpc::{
  39    AnyProtoClient,
  40    proto::{self, FromProto, ToProto, split_worktree_update},
  41};
  42pub use settings::WorktreeId;
  43use settings::{Settings, SettingsLocation, SettingsStore};
  44use smallvec::{SmallVec, smallvec};
  45use smol::channel::{self, Sender};
  46use std::{
  47    any::Any,
  48    borrow::Borrow as _,
  49    cmp::Ordering,
  50    collections::hash_map,
  51    convert::TryFrom,
  52    ffi::OsStr,
  53    fmt,
  54    future::Future,
  55    mem::{self},
  56    ops::{Deref, DerefMut},
  57    path::{Component, Path, PathBuf},
  58    pin::Pin,
  59    sync::{
  60        Arc,
  61        atomic::{AtomicUsize, Ordering::SeqCst},
  62    },
  63    time::{Duration, Instant},
  64};
  65use sum_tree::{Bias, Edit, KeyedItem, SeekTarget, SumTree, Summary, TreeMap, TreeSet, Unit};
  66use text::{LineEnding, Rope};
  67use util::{
  68    ResultExt,
  69    paths::{PathMatcher, SanitizedPath, home_dir},
  70};
  71pub use worktree_settings::WorktreeSettings;
  72
  73pub const FS_WATCH_LATENCY: Duration = Duration::from_millis(100);
  74
  75/// A set of local or remote files that are being opened as part of a project.
  76/// Responsible for tracking related FS (for local)/collab (for remote) events and corresponding updates.
  77/// Stores git repositories data and the diagnostics for the file(s).
  78///
  79/// Has an absolute path, and may be set to be visible in Zed UI or not.
  80/// May correspond to a directory or a single file.
  81/// Possible examples:
  82/// * a drag and dropped file — may be added as an invisible, "ephemeral" entry to the current worktree
  83/// * a directory opened in Zed — may be added as a visible entry to the current worktree
  84///
  85/// Uses [`Entry`] to track the state of each file/directory, can look up absolute paths for entries.
  86pub enum Worktree {
  87    Local(LocalWorktree),
  88    Remote(RemoteWorktree),
  89}
  90
  91/// An entry, created in the worktree.
  92#[derive(Debug)]
  93pub enum CreatedEntry {
  94    /// Got created and indexed by the worktree, receiving a corresponding entry.
  95    Included(Entry),
  96    /// Got created, but not indexed due to falling under exclusion filters.
  97    Excluded { abs_path: PathBuf },
  98}
  99
 100pub struct LoadedFile {
 101    pub file: Arc<File>,
 102    pub text: String,
 103}
 104
 105pub struct LoadedBinaryFile {
 106    pub file: Arc<File>,
 107    pub content: Vec<u8>,
 108}
 109
 110impl fmt::Debug for LoadedBinaryFile {
 111    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
 112        f.debug_struct("LoadedBinaryFile")
 113            .field("file", &self.file)
 114            .field("content_bytes", &self.content.len())
 115            .finish()
 116    }
 117}
 118
 119pub struct LocalWorktree {
 120    snapshot: LocalSnapshot,
 121    scan_requests_tx: channel::Sender<ScanRequest>,
 122    path_prefixes_to_scan_tx: channel::Sender<PathPrefixScanRequest>,
 123    is_scanning: (watch::Sender<bool>, watch::Receiver<bool>),
 124    _background_scanner_tasks: Vec<Task<()>>,
 125    update_observer: Option<UpdateObservationState>,
 126    fs: Arc<dyn Fs>,
 127    fs_case_sensitive: bool,
 128    visible: bool,
 129    next_entry_id: Arc<AtomicUsize>,
 130    settings: WorktreeSettings,
 131    share_private_files: bool,
 132}
 133
 134pub struct PathPrefixScanRequest {
 135    path: Arc<Path>,
 136    done: SmallVec<[barrier::Sender; 1]>,
 137}
 138
 139struct ScanRequest {
 140    relative_paths: Vec<Arc<Path>>,
 141    done: SmallVec<[barrier::Sender; 1]>,
 142}
 143
 144pub struct RemoteWorktree {
 145    snapshot: Snapshot,
 146    background_snapshot: Arc<Mutex<(Snapshot, Vec<proto::UpdateWorktree>)>>,
 147    project_id: u64,
 148    client: AnyProtoClient,
 149    file_scan_inclusions: PathMatcher,
 150    updates_tx: Option<UnboundedSender<proto::UpdateWorktree>>,
 151    update_observer: Option<mpsc::UnboundedSender<proto::UpdateWorktree>>,
 152    snapshot_subscriptions: VecDeque<(usize, oneshot::Sender<()>)>,
 153    replica_id: ReplicaId,
 154    visible: bool,
 155    disconnected: bool,
 156}
 157
 158#[derive(Clone)]
 159pub struct Snapshot {
 160    id: WorktreeId,
 161    abs_path: SanitizedPath,
 162    root_name: String,
 163    root_char_bag: CharBag,
 164    entries_by_path: SumTree<Entry>,
 165    entries_by_id: SumTree<PathEntry>,
 166    always_included_entries: Vec<Arc<Path>>,
 167
 168    /// A number that increases every time the worktree begins scanning
 169    /// a set of paths from the filesystem. This scanning could be caused
 170    /// by some operation performed on the worktree, such as reading or
 171    /// writing a file, or by an event reported by the filesystem.
 172    scan_id: usize,
 173
 174    /// The latest scan id that has completed, and whose preceding scans
 175    /// have all completed. The current `scan_id` could be more than one
 176    /// greater than the `completed_scan_id` if operations are performed
 177    /// on the worktree while it is processing a file-system event.
 178    completed_scan_id: usize,
 179}
 180
 181/// This path corresponds to the 'content path' of a repository in relation
 182/// to Zed's project root.
 183/// In the majority of the cases, this is the folder that contains the .git folder.
 184/// But if a sub-folder of a git repository is opened, this corresponds to the
 185/// project root and the .git folder is located in a parent directory.
 186#[derive(Clone, Debug, Ord, PartialOrd, Eq, PartialEq, Hash)]
 187pub enum WorkDirectory {
 188    InProject {
 189        relative_path: Arc<Path>,
 190    },
 191    AboveProject {
 192        absolute_path: Arc<Path>,
 193        location_in_repo: Arc<Path>,
 194    },
 195}
 196
 197impl WorkDirectory {
 198    #[cfg(test)]
 199    fn in_project(path: &str) -> Self {
 200        let path = Path::new(path);
 201        Self::InProject {
 202            relative_path: path.into(),
 203        }
 204    }
 205
 206    //#[cfg(test)]
 207    //fn canonicalize(&self) -> Self {
 208    //    match self {
 209    //        WorkDirectory::InProject { relative_path } => WorkDirectory::InProject {
 210    //            relative_path: relative_path.clone(),
 211    //        },
 212    //        WorkDirectory::AboveProject {
 213    //            absolute_path,
 214    //            location_in_repo,
 215    //        } => WorkDirectory::AboveProject {
 216    //            absolute_path: absolute_path.canonicalize().unwrap().into(),
 217    //            location_in_repo: location_in_repo.clone(),
 218    //        },
 219    //    }
 220    //}
 221
 222    fn path_key(&self) -> PathKey {
 223        match self {
 224            WorkDirectory::InProject { relative_path } => PathKey(relative_path.clone()),
 225            WorkDirectory::AboveProject { .. } => PathKey(Path::new("").into()),
 226        }
 227    }
 228
 229    /// Returns true if the given path is a child of the work directory.
 230    ///
 231    /// Note that the path may not be a member of this repository, if there
 232    /// is a repository in a directory between these two paths
 233    /// external .git folder in a parent folder of the project root.
 234    #[track_caller]
 235    pub fn directory_contains(&self, path: impl AsRef<Path>) -> bool {
 236        let path = path.as_ref();
 237        debug_assert!(path.is_relative());
 238        match self {
 239            WorkDirectory::InProject { relative_path } => path.starts_with(relative_path),
 240            WorkDirectory::AboveProject { .. } => true,
 241        }
 242    }
 243
 244    /// relativize returns the given project path relative to the root folder of the
 245    /// repository.
 246    /// If the root of the repository (and its .git folder) are located in a parent folder
 247    /// of the project root folder, then the returned RepoPath is relative to the root
 248    /// of the repository and not a valid path inside the project.
 249    pub fn relativize(&self, path: &Path) -> Result<RepoPath> {
 250        // path is assumed to be relative to worktree root.
 251        debug_assert!(path.is_relative());
 252        match self {
 253            WorkDirectory::InProject { relative_path } => Ok(path
 254                .strip_prefix(relative_path)
 255                .map_err(|_| anyhow!("could not relativize {path:?} against {relative_path:?}"))?
 256                .into()),
 257            WorkDirectory::AboveProject {
 258                location_in_repo, ..
 259            } => {
 260                // Avoid joining a `/` to location_in_repo in the case of a single-file worktree.
 261                if path == Path::new("") {
 262                    Ok(RepoPath(location_in_repo.clone()))
 263                } else {
 264                    Ok(location_in_repo.join(path).into())
 265                }
 266            }
 267        }
 268    }
 269
 270    /// This is the opposite operation to `relativize` above
 271    pub fn try_unrelativize(&self, path: &RepoPath) -> Option<Arc<Path>> {
 272        match self {
 273            WorkDirectory::InProject { relative_path } => Some(relative_path.join(path).into()),
 274            WorkDirectory::AboveProject {
 275                location_in_repo, ..
 276            } => {
 277                // If we fail to strip the prefix, that means this status entry is
 278                // external to this worktree, and we definitely won't have an entry_id
 279                path.strip_prefix(location_in_repo).ok().map(Into::into)
 280            }
 281        }
 282    }
 283
 284    pub fn unrelativize(&self, path: &RepoPath) -> Arc<Path> {
 285        match self {
 286            WorkDirectory::InProject { relative_path } => relative_path.join(path).into(),
 287            WorkDirectory::AboveProject {
 288                location_in_repo, ..
 289            } => {
 290                if &path.0 == location_in_repo {
 291                    // Single-file worktree
 292                    return location_in_repo
 293                        .file_name()
 294                        .map(Path::new)
 295                        .unwrap_or(Path::new(""))
 296                        .into();
 297                }
 298                let mut location_in_repo = &**location_in_repo;
 299                let mut parents = PathBuf::new();
 300                loop {
 301                    if let Ok(segment) = path.strip_prefix(location_in_repo) {
 302                        return parents.join(segment).into();
 303                    }
 304                    location_in_repo = location_in_repo.parent().unwrap_or(Path::new(""));
 305                    parents.push(Component::ParentDir);
 306                }
 307            }
 308        }
 309    }
 310
 311    pub fn display_name(&self) -> String {
 312        match self {
 313            WorkDirectory::InProject { relative_path } => relative_path.display().to_string(),
 314            WorkDirectory::AboveProject {
 315                absolute_path,
 316                location_in_repo,
 317            } => {
 318                let num_of_dots = location_in_repo.components().count();
 319
 320                "../".repeat(num_of_dots)
 321                    + &absolute_path
 322                        .file_name()
 323                        .map(|s| s.to_string_lossy())
 324                        .unwrap_or_default()
 325                    + "/"
 326            }
 327        }
 328    }
 329}
 330
 331impl Default for WorkDirectory {
 332    fn default() -> Self {
 333        Self::InProject {
 334            relative_path: Arc::from(Path::new("")),
 335        }
 336    }
 337}
 338
 339#[derive(Clone, Debug, Ord, PartialOrd, Eq, PartialEq)]
 340pub struct WorkDirectoryEntry(ProjectEntryId);
 341
 342impl Deref for WorkDirectoryEntry {
 343    type Target = ProjectEntryId;
 344
 345    fn deref(&self) -> &Self::Target {
 346        &self.0
 347    }
 348}
 349
 350impl From<ProjectEntryId> for WorkDirectoryEntry {
 351    fn from(value: ProjectEntryId) -> Self {
 352        WorkDirectoryEntry(value)
 353    }
 354}
 355
 356#[derive(Debug, Clone)]
 357pub struct LocalSnapshot {
 358    snapshot: Snapshot,
 359    /// All of the gitignore files in the worktree, indexed by their relative path.
 360    /// The boolean indicates whether the gitignore needs to be updated.
 361    ignores_by_parent_abs_path: HashMap<Arc<Path>, (Arc<Gitignore>, bool)>,
 362    /// All of the git repositories in the worktree, indexed by the project entry
 363    /// id of their parent directory.
 364    git_repositories: TreeMap<ProjectEntryId, LocalRepositoryEntry>,
 365    /// The file handle of the root dir
 366    /// (so we can find it after it's been moved)
 367    root_file_handle: Option<Arc<dyn fs::FileHandle>>,
 368}
 369
 370struct BackgroundScannerState {
 371    snapshot: LocalSnapshot,
 372    scanned_dirs: HashSet<ProjectEntryId>,
 373    path_prefixes_to_scan: HashSet<Arc<Path>>,
 374    paths_to_scan: HashSet<Arc<Path>>,
 375    /// The ids of all of the entries that were removed from the snapshot
 376    /// as part of the current update. These entry ids may be re-used
 377    /// if the same inode is discovered at a new path, or if the given
 378    /// path is re-created after being deleted.
 379    removed_entries: HashMap<u64, Entry>,
 380    changed_paths: Vec<Arc<Path>>,
 381    prev_snapshot: Snapshot,
 382}
 383
 384#[derive(Debug, Clone)]
 385struct LocalRepositoryEntry {
 386    work_directory_id: ProjectEntryId,
 387    work_directory: WorkDirectory,
 388    work_directory_abs_path: Arc<Path>,
 389    git_dir_scan_id: usize,
 390    /// Absolute path to the original .git entry that caused us to create this repository.
 391    ///
 392    /// This is normally a directory, but may be a "gitfile" that points to a directory elsewhere
 393    /// (whose path we then store in `repository_dir_abs_path`).
 394    dot_git_abs_path: Arc<Path>,
 395    /// Absolute path to the "commondir" for this repository.
 396    ///
 397    /// This is always a directory. For a normal repository, this is the same as dot_git_abs_path,
 398    /// but in the case of a submodule or a worktree it is the path to the "parent" .git directory
 399    /// from which the submodule/worktree was derived.
 400    common_dir_abs_path: Arc<Path>,
 401    /// Absolute path to the directory holding the repository's state.
 402    ///
 403    /// For a normal repository, this is a directory and coincides with `dot_git_abs_path` and
 404    /// `common_dir_abs_path`. For a submodule or worktree, this is some subdirectory of the
 405    /// commondir like `/project/.git/modules/foo`.
 406    repository_dir_abs_path: Arc<Path>,
 407}
 408
 409impl sum_tree::Item for LocalRepositoryEntry {
 410    type Summary = PathSummary<Unit>;
 411
 412    fn summary(&self, _: &<Self::Summary as Summary>::Context) -> Self::Summary {
 413        PathSummary {
 414            max_path: self.work_directory.path_key().0,
 415            item_summary: Unit,
 416        }
 417    }
 418}
 419
 420impl KeyedItem for LocalRepositoryEntry {
 421    type Key = PathKey;
 422
 423    fn key(&self) -> Self::Key {
 424        self.work_directory.path_key()
 425    }
 426}
 427
 428//impl LocalRepositoryEntry {
 429//    pub fn repo(&self) -> &Arc<dyn GitRepository> {
 430//        &self.repo_ptr
 431//    }
 432//}
 433
 434impl Deref for LocalRepositoryEntry {
 435    type Target = WorkDirectory;
 436
 437    fn deref(&self) -> &Self::Target {
 438        &self.work_directory
 439    }
 440}
 441
 442impl Deref for LocalSnapshot {
 443    type Target = Snapshot;
 444
 445    fn deref(&self) -> &Self::Target {
 446        &self.snapshot
 447    }
 448}
 449
 450impl DerefMut for LocalSnapshot {
 451    fn deref_mut(&mut self) -> &mut Self::Target {
 452        &mut self.snapshot
 453    }
 454}
 455
 456#[derive(Debug)]
 457enum ScanState {
 458    Started,
 459    Updated {
 460        snapshot: LocalSnapshot,
 461        changes: UpdatedEntriesSet,
 462        barrier: SmallVec<[barrier::Sender; 1]>,
 463        scanning: bool,
 464    },
 465    RootUpdated {
 466        new_path: Option<SanitizedPath>,
 467    },
 468}
 469
 470struct UpdateObservationState {
 471    snapshots_tx: mpsc::UnboundedSender<(LocalSnapshot, UpdatedEntriesSet)>,
 472    resume_updates: watch::Sender<()>,
 473    _maintain_remote_snapshot: Task<Option<()>>,
 474}
 475
 476#[derive(Clone)]
 477pub enum Event {
 478    UpdatedEntries(UpdatedEntriesSet),
 479    UpdatedGitRepositories(UpdatedGitRepositoriesSet),
 480    DeletedEntry(ProjectEntryId),
 481}
 482
 483const EMPTY_PATH: &str = "";
 484
 485impl EventEmitter<Event> for Worktree {}
 486
 487impl Worktree {
 488    pub async fn local(
 489        path: impl Into<Arc<Path>>,
 490        visible: bool,
 491        fs: Arc<dyn Fs>,
 492        next_entry_id: Arc<AtomicUsize>,
 493        cx: &mut AsyncApp,
 494    ) -> Result<Entity<Self>> {
 495        let abs_path = path.into();
 496        let metadata = fs
 497            .metadata(&abs_path)
 498            .await
 499            .context("failed to stat worktree path")?;
 500
 501        let fs_case_sensitive = fs.is_case_sensitive().await.unwrap_or_else(|e| {
 502            log::error!(
 503                "Failed to determine whether filesystem is case sensitive (falling back to true) due to error: {e:#}"
 504            );
 505            true
 506        });
 507
 508        let root_file_handle = fs.open_handle(&abs_path).await.log_err();
 509
 510        cx.new(move |cx: &mut Context<Worktree>| {
 511            let mut snapshot = LocalSnapshot {
 512                ignores_by_parent_abs_path: Default::default(),
 513                git_repositories: Default::default(),
 514                snapshot: Snapshot::new(
 515                    cx.entity_id().as_u64(),
 516                    abs_path
 517                        .file_name()
 518                        .map_or(String::new(), |f| f.to_string_lossy().to_string()),
 519                    abs_path.clone(),
 520                ),
 521                root_file_handle,
 522            };
 523
 524            let worktree_id = snapshot.id();
 525            let settings_location = Some(SettingsLocation {
 526                worktree_id,
 527                path: Path::new(EMPTY_PATH),
 528            });
 529
 530            let settings = WorktreeSettings::get(settings_location, cx).clone();
 531            cx.observe_global::<SettingsStore>(move |this, cx| {
 532                if let Self::Local(this) = this {
 533                    let settings = WorktreeSettings::get(settings_location, cx).clone();
 534                    if this.settings != settings {
 535                        this.settings = settings;
 536                        this.restart_background_scanners(cx);
 537                    }
 538                }
 539            })
 540            .detach();
 541
 542            let share_private_files = false;
 543            if let Some(metadata) = metadata {
 544                let mut entry = Entry::new(
 545                    Arc::from(Path::new("")),
 546                    &metadata,
 547                    &next_entry_id,
 548                    snapshot.root_char_bag,
 549                    None,
 550                );
 551                if !metadata.is_dir {
 552                    entry.is_private = !share_private_files
 553                        && settings.is_path_private(abs_path.file_name().unwrap().as_ref());
 554                }
 555                snapshot.insert_entry(entry, fs.as_ref());
 556            }
 557
 558            let (scan_requests_tx, scan_requests_rx) = channel::unbounded();
 559            let (path_prefixes_to_scan_tx, path_prefixes_to_scan_rx) = channel::unbounded();
 560            let mut worktree = LocalWorktree {
 561                share_private_files,
 562                next_entry_id,
 563                snapshot,
 564                is_scanning: watch::channel_with(true),
 565                update_observer: None,
 566                scan_requests_tx,
 567                path_prefixes_to_scan_tx,
 568                _background_scanner_tasks: Vec::new(),
 569                fs,
 570                fs_case_sensitive,
 571                visible,
 572                settings,
 573            };
 574            worktree.start_background_scanner(scan_requests_rx, path_prefixes_to_scan_rx, cx);
 575            Worktree::Local(worktree)
 576        })
 577    }
 578
 579    pub fn remote(
 580        project_id: u64,
 581        replica_id: ReplicaId,
 582        worktree: proto::WorktreeMetadata,
 583        client: AnyProtoClient,
 584        cx: &mut App,
 585    ) -> Entity<Self> {
 586        cx.new(|cx: &mut Context<Self>| {
 587            let snapshot = Snapshot::new(
 588                worktree.id,
 589                worktree.root_name,
 590                Arc::<Path>::from_proto(worktree.abs_path),
 591            );
 592
 593            let background_snapshot = Arc::new(Mutex::new((
 594                snapshot.clone(),
 595                Vec::<proto::UpdateWorktree>::new(),
 596            )));
 597            let (background_updates_tx, mut background_updates_rx) =
 598                mpsc::unbounded::<proto::UpdateWorktree>();
 599            let (mut snapshot_updated_tx, mut snapshot_updated_rx) = watch::channel();
 600
 601            let worktree_id = snapshot.id();
 602            let settings_location = Some(SettingsLocation {
 603                worktree_id,
 604                path: Path::new(EMPTY_PATH),
 605            });
 606
 607            let settings = WorktreeSettings::get(settings_location, cx).clone();
 608            let worktree = RemoteWorktree {
 609                client,
 610                project_id,
 611                replica_id,
 612                snapshot,
 613                file_scan_inclusions: settings.file_scan_inclusions.clone(),
 614                background_snapshot: background_snapshot.clone(),
 615                updates_tx: Some(background_updates_tx),
 616                update_observer: None,
 617                snapshot_subscriptions: Default::default(),
 618                visible: worktree.visible,
 619                disconnected: false,
 620            };
 621
 622            // Apply updates to a separate snapshot in a background task, then
 623            // send them to a foreground task which updates the model.
 624            cx.background_spawn(async move {
 625                while let Some(update) = background_updates_rx.next().await {
 626                    {
 627                        let mut lock = background_snapshot.lock();
 628                        lock.0
 629                            .apply_remote_update(update.clone(), &settings.file_scan_inclusions)
 630                            .log_err();
 631                        lock.1.push(update);
 632                    }
 633                    snapshot_updated_tx.send(()).await.ok();
 634                }
 635            })
 636            .detach();
 637
 638            // On the foreground task, update to the latest snapshot and notify
 639            // any update observer of all updates that led to that snapshot.
 640            cx.spawn(async move |this, cx| {
 641                while (snapshot_updated_rx.recv().await).is_some() {
 642                    this.update(cx, |this, cx| {
 643                        let mut entries_changed = false;
 644                        let this = this.as_remote_mut().unwrap();
 645                        {
 646                            let mut lock = this.background_snapshot.lock();
 647                            this.snapshot = lock.0.clone();
 648                            for update in lock.1.drain(..) {
 649                                entries_changed |= !update.updated_entries.is_empty()
 650                                    || !update.removed_entries.is_empty();
 651                                if let Some(tx) = &this.update_observer {
 652                                    tx.unbounded_send(update).ok();
 653                                }
 654                            }
 655                        };
 656
 657                        if entries_changed {
 658                            cx.emit(Event::UpdatedEntries(Arc::default()));
 659                        }
 660                        cx.notify();
 661                        while let Some((scan_id, _)) = this.snapshot_subscriptions.front() {
 662                            if this.observed_snapshot(*scan_id) {
 663                                let (_, tx) = this.snapshot_subscriptions.pop_front().unwrap();
 664                                let _ = tx.send(());
 665                            } else {
 666                                break;
 667                            }
 668                        }
 669                    })?;
 670                }
 671                anyhow::Ok(())
 672            })
 673            .detach();
 674
 675            Worktree::Remote(worktree)
 676        })
 677    }
 678
 679    pub fn as_local(&self) -> Option<&LocalWorktree> {
 680        if let Worktree::Local(worktree) = self {
 681            Some(worktree)
 682        } else {
 683            None
 684        }
 685    }
 686
 687    pub fn as_remote(&self) -> Option<&RemoteWorktree> {
 688        if let Worktree::Remote(worktree) = self {
 689            Some(worktree)
 690        } else {
 691            None
 692        }
 693    }
 694
 695    pub fn as_local_mut(&mut self) -> Option<&mut LocalWorktree> {
 696        if let Worktree::Local(worktree) = self {
 697            Some(worktree)
 698        } else {
 699            None
 700        }
 701    }
 702
 703    pub fn as_remote_mut(&mut self) -> Option<&mut RemoteWorktree> {
 704        if let Worktree::Remote(worktree) = self {
 705            Some(worktree)
 706        } else {
 707            None
 708        }
 709    }
 710
 711    pub fn is_local(&self) -> bool {
 712        matches!(self, Worktree::Local(_))
 713    }
 714
 715    pub fn is_remote(&self) -> bool {
 716        !self.is_local()
 717    }
 718
 719    pub fn settings_location(&self, _: &Context<Self>) -> SettingsLocation<'static> {
 720        SettingsLocation {
 721            worktree_id: self.id(),
 722            path: Path::new(EMPTY_PATH),
 723        }
 724    }
 725
 726    pub fn snapshot(&self) -> Snapshot {
 727        match self {
 728            Worktree::Local(worktree) => worktree.snapshot.snapshot.clone(),
 729            Worktree::Remote(worktree) => worktree.snapshot.clone(),
 730        }
 731    }
 732
 733    pub fn scan_id(&self) -> usize {
 734        match self {
 735            Worktree::Local(worktree) => worktree.snapshot.scan_id,
 736            Worktree::Remote(worktree) => worktree.snapshot.scan_id,
 737        }
 738    }
 739
 740    pub fn metadata_proto(&self) -> proto::WorktreeMetadata {
 741        proto::WorktreeMetadata {
 742            id: self.id().to_proto(),
 743            root_name: self.root_name().to_string(),
 744            visible: self.is_visible(),
 745            abs_path: self.abs_path().to_proto(),
 746        }
 747    }
 748
 749    pub fn completed_scan_id(&self) -> usize {
 750        match self {
 751            Worktree::Local(worktree) => worktree.snapshot.completed_scan_id,
 752            Worktree::Remote(worktree) => worktree.snapshot.completed_scan_id,
 753        }
 754    }
 755
 756    pub fn is_visible(&self) -> bool {
 757        match self {
 758            Worktree::Local(worktree) => worktree.visible,
 759            Worktree::Remote(worktree) => worktree.visible,
 760        }
 761    }
 762
 763    pub fn replica_id(&self) -> ReplicaId {
 764        match self {
 765            Worktree::Local(_) => 0,
 766            Worktree::Remote(worktree) => worktree.replica_id,
 767        }
 768    }
 769
 770    pub fn abs_path(&self) -> Arc<Path> {
 771        match self {
 772            Worktree::Local(worktree) => worktree.abs_path.clone().into(),
 773            Worktree::Remote(worktree) => worktree.abs_path.clone().into(),
 774        }
 775    }
 776
 777    pub fn root_file(&self, cx: &Context<Self>) -> Option<Arc<File>> {
 778        let entry = self.root_entry()?;
 779        Some(File::for_entry(entry.clone(), cx.entity()))
 780    }
 781
 782    pub fn observe_updates<F, Fut>(&mut self, project_id: u64, cx: &Context<Worktree>, callback: F)
 783    where
 784        F: 'static + Send + Fn(proto::UpdateWorktree) -> Fut,
 785        Fut: 'static + Send + Future<Output = bool>,
 786    {
 787        match self {
 788            Worktree::Local(this) => this.observe_updates(project_id, cx, callback),
 789            Worktree::Remote(this) => this.observe_updates(project_id, cx, callback),
 790        }
 791    }
 792
 793    pub fn stop_observing_updates(&mut self) {
 794        match self {
 795            Worktree::Local(this) => {
 796                this.update_observer.take();
 797            }
 798            Worktree::Remote(this) => {
 799                this.update_observer.take();
 800            }
 801        }
 802    }
 803
 804    #[cfg(any(test, feature = "test-support"))]
 805    pub fn has_update_observer(&self) -> bool {
 806        match self {
 807            Worktree::Local(this) => this.update_observer.is_some(),
 808            Worktree::Remote(this) => this.update_observer.is_some(),
 809        }
 810    }
 811
 812    pub fn load_file(&self, path: &Path, cx: &Context<Worktree>) -> Task<Result<LoadedFile>> {
 813        match self {
 814            Worktree::Local(this) => this.load_file(path, cx),
 815            Worktree::Remote(_) => {
 816                Task::ready(Err(anyhow!("remote worktrees can't yet load files")))
 817            }
 818        }
 819    }
 820
 821    pub fn load_binary_file(
 822        &self,
 823        path: &Path,
 824        cx: &Context<Worktree>,
 825    ) -> Task<Result<LoadedBinaryFile>> {
 826        match self {
 827            Worktree::Local(this) => this.load_binary_file(path, cx),
 828            Worktree::Remote(_) => {
 829                Task::ready(Err(anyhow!("remote worktrees can't yet load binary files")))
 830            }
 831        }
 832    }
 833
 834    pub fn write_file(
 835        &self,
 836        path: &Path,
 837        text: Rope,
 838        line_ending: LineEnding,
 839        cx: &Context<Worktree>,
 840    ) -> Task<Result<Arc<File>>> {
 841        match self {
 842            Worktree::Local(this) => this.write_file(path, text, line_ending, cx),
 843            Worktree::Remote(_) => {
 844                Task::ready(Err(anyhow!("remote worktree can't yet write files")))
 845            }
 846        }
 847    }
 848
 849    pub fn create_entry(
 850        &mut self,
 851        path: impl Into<Arc<Path>>,
 852        is_directory: bool,
 853        content: Option<Vec<u8>>,
 854        cx: &Context<Worktree>,
 855    ) -> Task<Result<CreatedEntry>> {
 856        let path: Arc<Path> = path.into();
 857        let worktree_id = self.id();
 858        match self {
 859            Worktree::Local(this) => this.create_entry(path, is_directory, content, cx),
 860            Worktree::Remote(this) => {
 861                let project_id = this.project_id;
 862                let request = this.client.request(proto::CreateProjectEntry {
 863                    worktree_id: worktree_id.to_proto(),
 864                    project_id,
 865                    path: path.as_ref().to_proto(),
 866                    content,
 867                    is_directory,
 868                });
 869                cx.spawn(async move |this, cx| {
 870                    let response = request.await?;
 871                    match response.entry {
 872                        Some(entry) => this
 873                            .update(cx, |worktree, cx| {
 874                                worktree.as_remote_mut().unwrap().insert_entry(
 875                                    entry,
 876                                    response.worktree_scan_id as usize,
 877                                    cx,
 878                                )
 879                            })?
 880                            .await
 881                            .map(CreatedEntry::Included),
 882                        None => {
 883                            let abs_path = this.read_with(cx, |worktree, _| {
 884                                worktree
 885                                    .absolutize(&path)
 886                                    .with_context(|| format!("absolutizing {path:?}"))
 887                            })??;
 888                            Ok(CreatedEntry::Excluded { abs_path })
 889                        }
 890                    }
 891                })
 892            }
 893        }
 894    }
 895
 896    pub fn delete_entry(
 897        &mut self,
 898        entry_id: ProjectEntryId,
 899        trash: bool,
 900        cx: &mut Context<Worktree>,
 901    ) -> Option<Task<Result<()>>> {
 902        let task = match self {
 903            Worktree::Local(this) => this.delete_entry(entry_id, trash, cx),
 904            Worktree::Remote(this) => this.delete_entry(entry_id, trash, cx),
 905        }?;
 906
 907        let entry = match &*self {
 908            Worktree::Local(this) => this.entry_for_id(entry_id),
 909            Worktree::Remote(this) => this.entry_for_id(entry_id),
 910        }?;
 911
 912        let mut ids = vec![entry_id];
 913        let path = &*entry.path;
 914
 915        self.get_children_ids_recursive(path, &mut ids);
 916
 917        for id in ids {
 918            cx.emit(Event::DeletedEntry(id));
 919        }
 920        Some(task)
 921    }
 922
 923    fn get_children_ids_recursive(&self, path: &Path, ids: &mut Vec<ProjectEntryId>) {
 924        let children_iter = self.child_entries(path);
 925        for child in children_iter {
 926            ids.push(child.id);
 927            self.get_children_ids_recursive(&child.path, ids);
 928        }
 929    }
 930
 931    pub fn rename_entry(
 932        &mut self,
 933        entry_id: ProjectEntryId,
 934        new_path: impl Into<Arc<Path>>,
 935        cx: &Context<Self>,
 936    ) -> Task<Result<CreatedEntry>> {
 937        let new_path = new_path.into();
 938        match self {
 939            Worktree::Local(this) => this.rename_entry(entry_id, new_path, cx),
 940            Worktree::Remote(this) => this.rename_entry(entry_id, new_path, cx),
 941        }
 942    }
 943
 944    pub fn copy_entry(
 945        &mut self,
 946        entry_id: ProjectEntryId,
 947        relative_worktree_source_path: Option<PathBuf>,
 948        new_path: impl Into<Arc<Path>>,
 949        cx: &Context<Self>,
 950    ) -> Task<Result<Option<Entry>>> {
 951        let new_path: Arc<Path> = new_path.into();
 952        match self {
 953            Worktree::Local(this) => {
 954                this.copy_entry(entry_id, relative_worktree_source_path, new_path, cx)
 955            }
 956            Worktree::Remote(this) => {
 957                let relative_worktree_source_path = relative_worktree_source_path
 958                    .map(|relative_worktree_source_path| relative_worktree_source_path.to_proto());
 959                let response = this.client.request(proto::CopyProjectEntry {
 960                    project_id: this.project_id,
 961                    entry_id: entry_id.to_proto(),
 962                    relative_worktree_source_path,
 963                    new_path: new_path.to_proto(),
 964                });
 965                cx.spawn(async move |this, cx| {
 966                    let response = response.await?;
 967                    match response.entry {
 968                        Some(entry) => this
 969                            .update(cx, |worktree, cx| {
 970                                worktree.as_remote_mut().unwrap().insert_entry(
 971                                    entry,
 972                                    response.worktree_scan_id as usize,
 973                                    cx,
 974                                )
 975                            })?
 976                            .await
 977                            .map(Some),
 978                        None => Ok(None),
 979                    }
 980                })
 981            }
 982        }
 983    }
 984
 985    pub fn copy_external_entries(
 986        &mut self,
 987        target_directory: Arc<Path>,
 988        paths: Vec<Arc<Path>>,
 989        fs: Arc<dyn Fs>,
 990        cx: &Context<Worktree>,
 991    ) -> Task<Result<Vec<ProjectEntryId>>> {
 992        match self {
 993            Worktree::Local(this) => this.copy_external_entries(target_directory, paths, cx),
 994            Worktree::Remote(this) => this.copy_external_entries(target_directory, paths, fs, cx),
 995        }
 996    }
 997
 998    pub fn expand_entry(
 999        &mut self,
1000        entry_id: ProjectEntryId,
1001        cx: &Context<Worktree>,
1002    ) -> Option<Task<Result<()>>> {
1003        match self {
1004            Worktree::Local(this) => this.expand_entry(entry_id, cx),
1005            Worktree::Remote(this) => {
1006                let response = this.client.request(proto::ExpandProjectEntry {
1007                    project_id: this.project_id,
1008                    entry_id: entry_id.to_proto(),
1009                });
1010                Some(cx.spawn(async move |this, cx| {
1011                    let response = response.await?;
1012                    this.update(cx, |this, _| {
1013                        this.as_remote_mut()
1014                            .unwrap()
1015                            .wait_for_snapshot(response.worktree_scan_id as usize)
1016                    })?
1017                    .await?;
1018                    Ok(())
1019                }))
1020            }
1021        }
1022    }
1023
1024    pub fn expand_all_for_entry(
1025        &mut self,
1026        entry_id: ProjectEntryId,
1027        cx: &Context<Worktree>,
1028    ) -> Option<Task<Result<()>>> {
1029        match self {
1030            Worktree::Local(this) => this.expand_all_for_entry(entry_id, cx),
1031            Worktree::Remote(this) => {
1032                let response = this.client.request(proto::ExpandAllForProjectEntry {
1033                    project_id: this.project_id,
1034                    entry_id: entry_id.to_proto(),
1035                });
1036                Some(cx.spawn(async move |this, cx| {
1037                    let response = response.await?;
1038                    this.update(cx, |this, _| {
1039                        this.as_remote_mut()
1040                            .unwrap()
1041                            .wait_for_snapshot(response.worktree_scan_id as usize)
1042                    })?
1043                    .await?;
1044                    Ok(())
1045                }))
1046            }
1047        }
1048    }
1049
1050    pub async fn handle_create_entry(
1051        this: Entity<Self>,
1052        request: proto::CreateProjectEntry,
1053        mut cx: AsyncApp,
1054    ) -> Result<proto::ProjectEntryResponse> {
1055        let (scan_id, entry) = this.update(&mut cx, |this, cx| {
1056            (
1057                this.scan_id(),
1058                this.create_entry(
1059                    Arc::<Path>::from_proto(request.path),
1060                    request.is_directory,
1061                    request.content,
1062                    cx,
1063                ),
1064            )
1065        })?;
1066        Ok(proto::ProjectEntryResponse {
1067            entry: match &entry.await? {
1068                CreatedEntry::Included(entry) => Some(entry.into()),
1069                CreatedEntry::Excluded { .. } => None,
1070            },
1071            worktree_scan_id: scan_id as u64,
1072        })
1073    }
1074
1075    pub async fn handle_delete_entry(
1076        this: Entity<Self>,
1077        request: proto::DeleteProjectEntry,
1078        mut cx: AsyncApp,
1079    ) -> Result<proto::ProjectEntryResponse> {
1080        let (scan_id, task) = this.update(&mut cx, |this, cx| {
1081            (
1082                this.scan_id(),
1083                this.delete_entry(
1084                    ProjectEntryId::from_proto(request.entry_id),
1085                    request.use_trash,
1086                    cx,
1087                ),
1088            )
1089        })?;
1090        task.context("invalid entry")?.await?;
1091        Ok(proto::ProjectEntryResponse {
1092            entry: None,
1093            worktree_scan_id: scan_id as u64,
1094        })
1095    }
1096
1097    pub async fn handle_expand_entry(
1098        this: Entity<Self>,
1099        request: proto::ExpandProjectEntry,
1100        mut cx: AsyncApp,
1101    ) -> Result<proto::ExpandProjectEntryResponse> {
1102        let task = this.update(&mut cx, |this, cx| {
1103            this.expand_entry(ProjectEntryId::from_proto(request.entry_id), cx)
1104        })?;
1105        task.context("no such entry")?.await?;
1106        let scan_id = this.read_with(&cx, |this, _| this.scan_id())?;
1107        Ok(proto::ExpandProjectEntryResponse {
1108            worktree_scan_id: scan_id as u64,
1109        })
1110    }
1111
1112    pub async fn handle_expand_all_for_entry(
1113        this: Entity<Self>,
1114        request: proto::ExpandAllForProjectEntry,
1115        mut cx: AsyncApp,
1116    ) -> Result<proto::ExpandAllForProjectEntryResponse> {
1117        let task = this.update(&mut cx, |this, cx| {
1118            this.expand_all_for_entry(ProjectEntryId::from_proto(request.entry_id), cx)
1119        })?;
1120        task.context("no such entry")?.await?;
1121        let scan_id = this.read_with(&cx, |this, _| this.scan_id())?;
1122        Ok(proto::ExpandAllForProjectEntryResponse {
1123            worktree_scan_id: scan_id as u64,
1124        })
1125    }
1126
1127    pub async fn handle_rename_entry(
1128        this: Entity<Self>,
1129        request: proto::RenameProjectEntry,
1130        mut cx: AsyncApp,
1131    ) -> Result<proto::ProjectEntryResponse> {
1132        let (scan_id, task) = this.update(&mut cx, |this, cx| {
1133            (
1134                this.scan_id(),
1135                this.rename_entry(
1136                    ProjectEntryId::from_proto(request.entry_id),
1137                    Arc::<Path>::from_proto(request.new_path),
1138                    cx,
1139                ),
1140            )
1141        })?;
1142        Ok(proto::ProjectEntryResponse {
1143            entry: match &task.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_copy_entry(
1152        this: Entity<Self>,
1153        request: proto::CopyProjectEntry,
1154        mut cx: AsyncApp,
1155    ) -> Result<proto::ProjectEntryResponse> {
1156        let (scan_id, task) = this.update(&mut cx, |this, cx| {
1157            let relative_worktree_source_path = request
1158                .relative_worktree_source_path
1159                .map(PathBuf::from_proto);
1160            (
1161                this.scan_id(),
1162                this.copy_entry(
1163                    ProjectEntryId::from_proto(request.entry_id),
1164                    relative_worktree_source_path,
1165                    PathBuf::from_proto(request.new_path),
1166                    cx,
1167                ),
1168            )
1169        })?;
1170        Ok(proto::ProjectEntryResponse {
1171            entry: task.await?.as_ref().map(|e| e.into()),
1172            worktree_scan_id: scan_id as u64,
1173        })
1174    }
1175
1176    pub fn dot_git_abs_path(&self, work_directory: &WorkDirectory) -> PathBuf {
1177        let mut path = match work_directory {
1178            WorkDirectory::InProject { relative_path } => self.abs_path().join(relative_path),
1179            WorkDirectory::AboveProject { absolute_path, .. } => absolute_path.as_ref().to_owned(),
1180        };
1181        path.push(".git");
1182        path
1183    }
1184
1185    pub fn is_single_file(&self) -> bool {
1186        self.root_dir().is_none()
1187    }
1188
1189    /// For visible worktrees, returns the path with the worktree name as the first component.
1190    /// Otherwise, returns an absolute path.
1191    pub fn full_path(&self, worktree_relative_path: &Path) -> PathBuf {
1192        let mut full_path = PathBuf::new();
1193
1194        if self.is_visible() {
1195            full_path.push(self.root_name());
1196        } else {
1197            let path = self.abs_path();
1198
1199            if self.is_local() && path.starts_with(home_dir().as_path()) {
1200                full_path.push("~");
1201                full_path.push(path.strip_prefix(home_dir().as_path()).unwrap());
1202            } else {
1203                full_path.push(path)
1204            }
1205        }
1206
1207        if worktree_relative_path.components().next().is_some() {
1208            full_path.push(&worktree_relative_path);
1209        }
1210
1211        full_path
1212    }
1213}
1214
1215impl LocalWorktree {
1216    pub fn fs(&self) -> &Arc<dyn Fs> {
1217        &self.fs
1218    }
1219
1220    pub fn is_path_private(&self, path: &Path) -> bool {
1221        !self.share_private_files && self.settings.is_path_private(path)
1222    }
1223
1224    fn restart_background_scanners(&mut self, cx: &Context<Worktree>) {
1225        let (scan_requests_tx, scan_requests_rx) = channel::unbounded();
1226        let (path_prefixes_to_scan_tx, path_prefixes_to_scan_rx) = channel::unbounded();
1227        self.scan_requests_tx = scan_requests_tx;
1228        self.path_prefixes_to_scan_tx = path_prefixes_to_scan_tx;
1229
1230        self.start_background_scanner(scan_requests_rx, path_prefixes_to_scan_rx, cx);
1231        let always_included_entries = mem::take(&mut self.snapshot.always_included_entries);
1232        log::debug!(
1233            "refreshing entries for the following always included paths: {:?}",
1234            always_included_entries
1235        );
1236
1237        // Cleans up old always included entries to ensure they get updated properly. Otherwise,
1238        // nested always included entries may not get updated and will result in out-of-date info.
1239        self.refresh_entries_for_paths(always_included_entries);
1240    }
1241
1242    fn start_background_scanner(
1243        &mut self,
1244        scan_requests_rx: channel::Receiver<ScanRequest>,
1245        path_prefixes_to_scan_rx: channel::Receiver<PathPrefixScanRequest>,
1246        cx: &Context<Worktree>,
1247    ) {
1248        let snapshot = self.snapshot();
1249        let share_private_files = self.share_private_files;
1250        let next_entry_id = self.next_entry_id.clone();
1251        let fs = self.fs.clone();
1252        let settings = self.settings.clone();
1253        let (scan_states_tx, mut scan_states_rx) = mpsc::unbounded();
1254        let background_scanner = cx.background_spawn({
1255            let abs_path = snapshot.abs_path.as_path().to_path_buf();
1256            let background = cx.background_executor().clone();
1257            async move {
1258                let (events, watcher) = fs.watch(&abs_path, FS_WATCH_LATENCY).await;
1259                let fs_case_sensitive = fs.is_case_sensitive().await.unwrap_or_else(|e| {
1260                    log::error!("Failed to determine whether filesystem is case sensitive: {e:#}");
1261                    true
1262                });
1263
1264                let mut scanner = BackgroundScanner {
1265                    fs,
1266                    fs_case_sensitive,
1267                    status_updates_tx: scan_states_tx,
1268                    executor: background,
1269                    scan_requests_rx,
1270                    path_prefixes_to_scan_rx,
1271                    next_entry_id,
1272                    state: Mutex::new(BackgroundScannerState {
1273                        prev_snapshot: snapshot.snapshot.clone(),
1274                        snapshot,
1275                        scanned_dirs: Default::default(),
1276                        path_prefixes_to_scan: Default::default(),
1277                        paths_to_scan: Default::default(),
1278                        removed_entries: Default::default(),
1279                        changed_paths: Default::default(),
1280                    }),
1281                    phase: BackgroundScannerPhase::InitialScan,
1282                    share_private_files,
1283                    settings,
1284                    watcher,
1285                };
1286
1287                scanner
1288                    .run(Box::pin(events.map(|events| events.into_iter().collect())))
1289                    .await;
1290            }
1291        });
1292        let scan_state_updater = cx.spawn(async move |this, cx| {
1293            while let Some((state, this)) = scan_states_rx.next().await.zip(this.upgrade()) {
1294                this.update(cx, |this, cx| {
1295                    let this = this.as_local_mut().unwrap();
1296                    match state {
1297                        ScanState::Started => {
1298                            *this.is_scanning.0.borrow_mut() = true;
1299                        }
1300                        ScanState::Updated {
1301                            snapshot,
1302                            changes,
1303                            barrier,
1304                            scanning,
1305                        } => {
1306                            *this.is_scanning.0.borrow_mut() = scanning;
1307                            this.set_snapshot(snapshot, changes, cx);
1308                            drop(barrier);
1309                        }
1310                        ScanState::RootUpdated { new_path } => {
1311                            this.update_abs_path_and_refresh(new_path, cx);
1312                        }
1313                    }
1314                })
1315                .ok();
1316            }
1317        });
1318        self._background_scanner_tasks = vec![background_scanner, scan_state_updater];
1319        self.is_scanning = watch::channel_with(true);
1320    }
1321
1322    fn set_snapshot(
1323        &mut self,
1324        mut new_snapshot: LocalSnapshot,
1325        entry_changes: UpdatedEntriesSet,
1326        cx: &mut Context<Worktree>,
1327    ) {
1328        let repo_changes = self.changed_repos(&self.snapshot, &mut new_snapshot);
1329        self.snapshot = new_snapshot;
1330
1331        if let Some(share) = self.update_observer.as_mut() {
1332            share
1333                .snapshots_tx
1334                .unbounded_send((self.snapshot.clone(), entry_changes.clone()))
1335                .ok();
1336        }
1337
1338        if !entry_changes.is_empty() {
1339            cx.emit(Event::UpdatedEntries(entry_changes));
1340        }
1341        if !repo_changes.is_empty() {
1342            cx.emit(Event::UpdatedGitRepositories(repo_changes));
1343        }
1344    }
1345
1346    fn changed_repos(
1347        &self,
1348        old_snapshot: &LocalSnapshot,
1349        new_snapshot: &mut LocalSnapshot,
1350    ) -> UpdatedGitRepositoriesSet {
1351        let mut changes = Vec::new();
1352        let mut old_repos = old_snapshot.git_repositories.iter().peekable();
1353        let new_repos = new_snapshot.git_repositories.clone();
1354        let mut new_repos = new_repos.iter().peekable();
1355
1356        loop {
1357            match (new_repos.peek().map(clone), old_repos.peek().map(clone)) {
1358                (Some((new_entry_id, new_repo)), Some((old_entry_id, old_repo))) => {
1359                    match Ord::cmp(&new_entry_id, &old_entry_id) {
1360                        Ordering::Less => {
1361                            changes.push(UpdatedGitRepository {
1362                                work_directory_id: new_entry_id,
1363                                old_work_directory_abs_path: None,
1364                                new_work_directory_abs_path: Some(
1365                                    new_repo.work_directory_abs_path.clone(),
1366                                ),
1367                                dot_git_abs_path: Some(new_repo.dot_git_abs_path.clone()),
1368                                repository_dir_abs_path: Some(
1369                                    new_repo.repository_dir_abs_path.clone(),
1370                                ),
1371                                common_dir_abs_path: Some(new_repo.common_dir_abs_path.clone()),
1372                            });
1373                            new_repos.next();
1374                        }
1375                        Ordering::Equal => {
1376                            if new_repo.git_dir_scan_id != old_repo.git_dir_scan_id
1377                                || new_repo.work_directory_abs_path
1378                                    != old_repo.work_directory_abs_path
1379                            {
1380                                changes.push(UpdatedGitRepository {
1381                                    work_directory_id: new_entry_id,
1382                                    old_work_directory_abs_path: Some(
1383                                        old_repo.work_directory_abs_path.clone(),
1384                                    ),
1385                                    new_work_directory_abs_path: Some(
1386                                        new_repo.work_directory_abs_path.clone(),
1387                                    ),
1388                                    dot_git_abs_path: Some(new_repo.dot_git_abs_path.clone()),
1389                                    repository_dir_abs_path: Some(
1390                                        new_repo.repository_dir_abs_path.clone(),
1391                                    ),
1392                                    common_dir_abs_path: Some(new_repo.common_dir_abs_path.clone()),
1393                                });
1394                            }
1395                            new_repos.next();
1396                            old_repos.next();
1397                        }
1398                        Ordering::Greater => {
1399                            changes.push(UpdatedGitRepository {
1400                                work_directory_id: old_entry_id,
1401                                old_work_directory_abs_path: Some(
1402                                    old_repo.work_directory_abs_path.clone(),
1403                                ),
1404                                new_work_directory_abs_path: None,
1405                                dot_git_abs_path: None,
1406                                repository_dir_abs_path: None,
1407                                common_dir_abs_path: None,
1408                            });
1409                            old_repos.next();
1410                        }
1411                    }
1412                }
1413                (Some((entry_id, repo)), None) => {
1414                    changes.push(UpdatedGitRepository {
1415                        work_directory_id: entry_id,
1416                        old_work_directory_abs_path: None,
1417                        new_work_directory_abs_path: Some(repo.work_directory_abs_path.clone()),
1418                        dot_git_abs_path: Some(repo.dot_git_abs_path.clone()),
1419                        repository_dir_abs_path: Some(repo.repository_dir_abs_path.clone()),
1420                        common_dir_abs_path: Some(repo.common_dir_abs_path.clone()),
1421                    });
1422                    new_repos.next();
1423                }
1424                (None, Some((entry_id, repo))) => {
1425                    changes.push(UpdatedGitRepository {
1426                        work_directory_id: entry_id,
1427                        old_work_directory_abs_path: Some(repo.work_directory_abs_path.clone()),
1428                        new_work_directory_abs_path: None,
1429                        dot_git_abs_path: Some(repo.dot_git_abs_path.clone()),
1430                        repository_dir_abs_path: Some(repo.repository_dir_abs_path.clone()),
1431                        common_dir_abs_path: Some(repo.common_dir_abs_path.clone()),
1432                    });
1433                    old_repos.next();
1434                }
1435                (None, None) => break,
1436            }
1437        }
1438
1439        fn clone<T: Clone, U: Clone>(value: &(&T, &U)) -> (T, U) {
1440            (value.0.clone(), value.1.clone())
1441        }
1442
1443        changes.into()
1444    }
1445
1446    pub fn scan_complete(&self) -> impl Future<Output = ()> + use<> {
1447        let mut is_scanning_rx = self.is_scanning.1.clone();
1448        async move {
1449            let mut is_scanning = *is_scanning_rx.borrow();
1450            while is_scanning {
1451                if let Some(value) = is_scanning_rx.recv().await {
1452                    is_scanning = value;
1453                } else {
1454                    break;
1455                }
1456            }
1457        }
1458    }
1459
1460    pub fn snapshot(&self) -> LocalSnapshot {
1461        self.snapshot.clone()
1462    }
1463
1464    pub fn settings(&self) -> WorktreeSettings {
1465        self.settings.clone()
1466    }
1467
1468    fn load_binary_file(
1469        &self,
1470        path: &Path,
1471        cx: &Context<Worktree>,
1472    ) -> Task<Result<LoadedBinaryFile>> {
1473        let path = Arc::from(path);
1474        let abs_path = self.absolutize(&path);
1475        let fs = self.fs.clone();
1476        let entry = self.refresh_entry(path.clone(), None, cx);
1477        let is_private = self.is_path_private(path.as_ref());
1478
1479        let worktree = cx.weak_entity();
1480        cx.background_spawn(async move {
1481            let abs_path = abs_path?;
1482            let content = fs.load_bytes(&abs_path).await?;
1483
1484            let worktree = worktree.upgrade().context("worktree was dropped")?;
1485            let file = match entry.await? {
1486                Some(entry) => File::for_entry(entry, worktree),
1487                None => {
1488                    let metadata = fs
1489                        .metadata(&abs_path)
1490                        .await
1491                        .with_context(|| {
1492                            format!("Loading metadata for excluded file {abs_path:?}")
1493                        })?
1494                        .with_context(|| {
1495                            format!("Excluded file {abs_path:?} got removed during loading")
1496                        })?;
1497                    Arc::new(File {
1498                        entry_id: None,
1499                        worktree,
1500                        path,
1501                        disk_state: DiskState::Present {
1502                            mtime: metadata.mtime,
1503                        },
1504                        is_local: true,
1505                        is_private,
1506                    })
1507                }
1508            };
1509
1510            Ok(LoadedBinaryFile { file, content })
1511        })
1512    }
1513
1514    fn load_file(&self, path: &Path, cx: &Context<Worktree>) -> Task<Result<LoadedFile>> {
1515        let path = Arc::from(path);
1516        let abs_path = self.absolutize(&path);
1517        let fs = self.fs.clone();
1518        let entry = self.refresh_entry(path.clone(), None, cx);
1519        let is_private = self.is_path_private(path.as_ref());
1520
1521        cx.spawn(async move |this, _cx| {
1522            let abs_path = abs_path?;
1523            // WARN: Temporary workaround for #27283.
1524            //       We are not efficient with our memory usage per file, and use in excess of 64GB for a 10GB file
1525            //       Therefore, as a temporary workaround to prevent system freezes, we just bail before opening a file
1526            //       if it is too large
1527            //       5GB seems to be more reasonable, peaking at ~16GB, while 6GB jumps up to >24GB which seems like a
1528            //       reasonable limit
1529            {
1530                const FILE_SIZE_MAX: u64 = 6 * 1024 * 1024 * 1024; // 6GB
1531                if let Ok(Some(metadata)) = fs.metadata(&abs_path).await {
1532                    if metadata.len >= FILE_SIZE_MAX {
1533                        anyhow::bail!("File is too large to load");
1534                    }
1535                }
1536            }
1537            let text = fs.load(&abs_path).await?;
1538
1539            let worktree = this.upgrade().context("worktree was dropped")?;
1540            let file = match entry.await? {
1541                Some(entry) => File::for_entry(entry, worktree),
1542                None => {
1543                    let metadata = fs
1544                        .metadata(&abs_path)
1545                        .await
1546                        .with_context(|| {
1547                            format!("Loading metadata for excluded file {abs_path:?}")
1548                        })?
1549                        .with_context(|| {
1550                            format!("Excluded file {abs_path:?} got removed during loading")
1551                        })?;
1552                    Arc::new(File {
1553                        entry_id: None,
1554                        worktree,
1555                        path,
1556                        disk_state: DiskState::Present {
1557                            mtime: metadata.mtime,
1558                        },
1559                        is_local: true,
1560                        is_private,
1561                    })
1562                }
1563            };
1564
1565            Ok(LoadedFile { file, text })
1566        })
1567    }
1568
1569    /// Find the lowest path in the worktree's datastructures that is an ancestor
1570    fn lowest_ancestor(&self, path: &Path) -> PathBuf {
1571        let mut lowest_ancestor = None;
1572        for path in path.ancestors() {
1573            if self.entry_for_path(path).is_some() {
1574                lowest_ancestor = Some(path.to_path_buf());
1575                break;
1576            }
1577        }
1578
1579        lowest_ancestor.unwrap_or_else(|| PathBuf::from(""))
1580    }
1581
1582    fn create_entry(
1583        &self,
1584        path: impl Into<Arc<Path>>,
1585        is_dir: bool,
1586        content: Option<Vec<u8>>,
1587        cx: &Context<Worktree>,
1588    ) -> Task<Result<CreatedEntry>> {
1589        let path = path.into();
1590        let abs_path = match self.absolutize(&path) {
1591            Ok(path) => path,
1592            Err(e) => return Task::ready(Err(e.context(format!("absolutizing path {path:?}")))),
1593        };
1594        let path_excluded = self.settings.is_path_excluded(&abs_path);
1595        let fs = self.fs.clone();
1596        let task_abs_path = abs_path.clone();
1597        let write = cx.background_spawn(async move {
1598            if is_dir {
1599                fs.create_dir(&task_abs_path)
1600                    .await
1601                    .with_context(|| format!("creating directory {task_abs_path:?}"))
1602            } else {
1603                fs.write(&task_abs_path, content.as_deref().unwrap_or(&[]))
1604                    .await
1605                    .with_context(|| format!("creating file {task_abs_path:?}"))
1606            }
1607        });
1608
1609        let lowest_ancestor = self.lowest_ancestor(&path);
1610        cx.spawn(async move |this, cx| {
1611            write.await?;
1612            if path_excluded {
1613                return Ok(CreatedEntry::Excluded { abs_path });
1614            }
1615
1616            let (result, refreshes) = this.update(cx, |this, cx| {
1617                let mut refreshes = Vec::new();
1618                let refresh_paths = path.strip_prefix(&lowest_ancestor).unwrap();
1619                for refresh_path in refresh_paths.ancestors() {
1620                    if refresh_path == Path::new("") {
1621                        continue;
1622                    }
1623                    let refresh_full_path = lowest_ancestor.join(refresh_path);
1624
1625                    refreshes.push(this.as_local_mut().unwrap().refresh_entry(
1626                        refresh_full_path.into(),
1627                        None,
1628                        cx,
1629                    ));
1630                }
1631                (
1632                    this.as_local_mut().unwrap().refresh_entry(path, None, cx),
1633                    refreshes,
1634                )
1635            })?;
1636            for refresh in refreshes {
1637                refresh.await.log_err();
1638            }
1639
1640            Ok(result
1641                .await?
1642                .map(CreatedEntry::Included)
1643                .unwrap_or_else(|| CreatedEntry::Excluded { abs_path }))
1644        })
1645    }
1646
1647    fn write_file(
1648        &self,
1649        path: impl Into<Arc<Path>>,
1650        text: Rope,
1651        line_ending: LineEnding,
1652        cx: &Context<Worktree>,
1653    ) -> Task<Result<Arc<File>>> {
1654        let path = path.into();
1655        let fs = self.fs.clone();
1656        let is_private = self.is_path_private(&path);
1657        let Ok(abs_path) = self.absolutize(&path) else {
1658            return Task::ready(Err(anyhow!("invalid path {path:?}")));
1659        };
1660
1661        let write = cx.background_spawn({
1662            let fs = fs.clone();
1663            let abs_path = abs_path.clone();
1664            async move { fs.save(&abs_path, &text, line_ending).await }
1665        });
1666
1667        cx.spawn(async move |this, cx| {
1668            write.await?;
1669            let entry = this
1670                .update(cx, |this, cx| {
1671                    this.as_local_mut()
1672                        .unwrap()
1673                        .refresh_entry(path.clone(), None, cx)
1674                })?
1675                .await?;
1676            let worktree = this.upgrade().context("worktree dropped")?;
1677            if let Some(entry) = entry {
1678                Ok(File::for_entry(entry, worktree))
1679            } else {
1680                let metadata = fs
1681                    .metadata(&abs_path)
1682                    .await
1683                    .with_context(|| {
1684                        format!("Fetching metadata after saving the excluded buffer {abs_path:?}")
1685                    })?
1686                    .with_context(|| {
1687                        format!("Excluded buffer {path:?} got removed during saving")
1688                    })?;
1689                Ok(Arc::new(File {
1690                    worktree,
1691                    path,
1692                    disk_state: DiskState::Present {
1693                        mtime: metadata.mtime,
1694                    },
1695                    entry_id: None,
1696                    is_local: true,
1697                    is_private,
1698                }))
1699            }
1700        })
1701    }
1702
1703    fn delete_entry(
1704        &self,
1705        entry_id: ProjectEntryId,
1706        trash: bool,
1707        cx: &Context<Worktree>,
1708    ) -> Option<Task<Result<()>>> {
1709        let entry = self.entry_for_id(entry_id)?.clone();
1710        let abs_path = self.absolutize(&entry.path);
1711        let fs = self.fs.clone();
1712
1713        let delete = cx.background_spawn(async move {
1714            if entry.is_file() {
1715                if trash {
1716                    fs.trash_file(&abs_path?, Default::default()).await?;
1717                } else {
1718                    fs.remove_file(&abs_path?, Default::default()).await?;
1719                }
1720            } else if trash {
1721                fs.trash_dir(
1722                    &abs_path?,
1723                    RemoveOptions {
1724                        recursive: true,
1725                        ignore_if_not_exists: false,
1726                    },
1727                )
1728                .await?;
1729            } else {
1730                fs.remove_dir(
1731                    &abs_path?,
1732                    RemoveOptions {
1733                        recursive: true,
1734                        ignore_if_not_exists: false,
1735                    },
1736                )
1737                .await?;
1738            }
1739            anyhow::Ok(entry.path)
1740        });
1741
1742        Some(cx.spawn(async move |this, cx| {
1743            let path = delete.await?;
1744            this.update(cx, |this, _| {
1745                this.as_local_mut()
1746                    .unwrap()
1747                    .refresh_entries_for_paths(vec![path])
1748            })?
1749            .recv()
1750            .await;
1751            Ok(())
1752        }))
1753    }
1754
1755    /// Rename an entry.
1756    ///
1757    /// `new_path` is the new relative path to the worktree root.
1758    /// If the root entry is renamed then `new_path` is the new root name instead.
1759    fn rename_entry(
1760        &self,
1761        entry_id: ProjectEntryId,
1762        new_path: impl Into<Arc<Path>>,
1763        cx: &Context<Worktree>,
1764    ) -> Task<Result<CreatedEntry>> {
1765        let old_path = match self.entry_for_id(entry_id) {
1766            Some(entry) => entry.path.clone(),
1767            None => return Task::ready(Err(anyhow!("no entry to rename for id {entry_id:?}"))),
1768        };
1769        let new_path = new_path.into();
1770        let abs_old_path = self.absolutize(&old_path);
1771
1772        let is_root_entry = self.root_entry().is_some_and(|e| e.id == entry_id);
1773        let abs_new_path = if is_root_entry {
1774            let Some(root_parent_path) = self.abs_path().parent() else {
1775                return Task::ready(Err(anyhow!("no parent for path {:?}", self.abs_path)));
1776            };
1777            root_parent_path.join(&new_path)
1778        } else {
1779            let Ok(absolutize_path) = self.absolutize(&new_path) else {
1780                return Task::ready(Err(anyhow!("absolutizing path {new_path:?}")));
1781            };
1782            absolutize_path
1783        };
1784        let abs_path = abs_new_path.clone();
1785        let fs = self.fs.clone();
1786        let case_sensitive = self.fs_case_sensitive;
1787        let rename = cx.background_spawn(async move {
1788            let abs_old_path = abs_old_path?;
1789            let abs_new_path = abs_new_path;
1790
1791            let abs_old_path_lower = abs_old_path.to_str().map(|p| p.to_lowercase());
1792            let abs_new_path_lower = abs_new_path.to_str().map(|p| p.to_lowercase());
1793
1794            // If we're on a case-insensitive FS and we're doing a case-only rename (i.e. `foobar` to `FOOBAR`)
1795            // we want to overwrite, because otherwise we run into a file-already-exists error.
1796            let overwrite = !case_sensitive
1797                && abs_old_path != abs_new_path
1798                && abs_old_path_lower == abs_new_path_lower;
1799
1800            fs.rename(
1801                &abs_old_path,
1802                &abs_new_path,
1803                fs::RenameOptions {
1804                    overwrite,
1805                    ..Default::default()
1806                },
1807            )
1808            .await
1809            .with_context(|| format!("Renaming {abs_old_path:?} into {abs_new_path:?}"))
1810        });
1811
1812        cx.spawn(async move |this, cx| {
1813            rename.await?;
1814            Ok(this
1815                .update(cx, |this, cx| {
1816                    let local = this.as_local_mut().unwrap();
1817                    if is_root_entry {
1818                        // We eagerly update `abs_path` and refresh this worktree.
1819                        // Otherwise, the FS watcher would do it on the `RootUpdated` event,
1820                        // but with a noticeable delay, so we handle it proactively.
1821                        local.update_abs_path_and_refresh(
1822                            Some(SanitizedPath::from(abs_path.clone())),
1823                            cx,
1824                        );
1825                        Task::ready(Ok(this.root_entry().cloned()))
1826                    } else {
1827                        local.refresh_entry(new_path.clone(), Some(old_path), cx)
1828                    }
1829                })?
1830                .await?
1831                .map(CreatedEntry::Included)
1832                .unwrap_or_else(|| CreatedEntry::Excluded { abs_path }))
1833        })
1834    }
1835
1836    fn copy_entry(
1837        &self,
1838        entry_id: ProjectEntryId,
1839        relative_worktree_source_path: Option<PathBuf>,
1840        new_path: impl Into<Arc<Path>>,
1841        cx: &Context<Worktree>,
1842    ) -> Task<Result<Option<Entry>>> {
1843        let old_path = match self.entry_for_id(entry_id) {
1844            Some(entry) => entry.path.clone(),
1845            None => return Task::ready(Ok(None)),
1846        };
1847        let new_path = new_path.into();
1848        let abs_old_path =
1849            if let Some(relative_worktree_source_path) = relative_worktree_source_path {
1850                Ok(self.abs_path().join(relative_worktree_source_path))
1851            } else {
1852                self.absolutize(&old_path)
1853            };
1854        let abs_new_path = self.absolutize(&new_path);
1855        let fs = self.fs.clone();
1856        let copy = cx.background_spawn(async move {
1857            copy_recursive(
1858                fs.as_ref(),
1859                &abs_old_path?,
1860                &abs_new_path?,
1861                Default::default(),
1862            )
1863            .await
1864        });
1865
1866        cx.spawn(async move |this, cx| {
1867            copy.await?;
1868            this.update(cx, |this, cx| {
1869                this.as_local_mut()
1870                    .unwrap()
1871                    .refresh_entry(new_path.clone(), None, cx)
1872            })?
1873            .await
1874        })
1875    }
1876
1877    pub fn copy_external_entries(
1878        &self,
1879        target_directory: Arc<Path>,
1880        paths: Vec<Arc<Path>>,
1881        cx: &Context<Worktree>,
1882    ) -> Task<Result<Vec<ProjectEntryId>>> {
1883        let Ok(target_directory) = self.absolutize(&target_directory) else {
1884            return Task::ready(Err(anyhow!("invalid target path")));
1885        };
1886        let worktree_path = self.abs_path().clone();
1887        let fs = self.fs.clone();
1888        let paths = paths
1889            .into_iter()
1890            .filter_map(|source| {
1891                let file_name = source.file_name()?;
1892                let mut target = target_directory.clone();
1893                target.push(file_name);
1894
1895                // Do not allow copying the same file to itself.
1896                if source.as_ref() != target.as_path() {
1897                    Some((source, target))
1898                } else {
1899                    None
1900                }
1901            })
1902            .collect::<Vec<_>>();
1903
1904        let paths_to_refresh = paths
1905            .iter()
1906            .filter_map(|(_, target)| Some(target.strip_prefix(&worktree_path).ok()?.into()))
1907            .collect::<Vec<_>>();
1908
1909        cx.spawn(async move |this, cx| {
1910            cx.background_spawn(async move {
1911                for (source, target) in paths {
1912                    copy_recursive(
1913                        fs.as_ref(),
1914                        &source,
1915                        &target,
1916                        fs::CopyOptions {
1917                            overwrite: true,
1918                            ..Default::default()
1919                        },
1920                    )
1921                    .await
1922                    .with_context(|| {
1923                        format!("Failed to copy file from {source:?} to {target:?}")
1924                    })?;
1925                }
1926                anyhow::Ok(())
1927            })
1928            .await
1929            .log_err();
1930            let mut refresh = cx.read_entity(
1931                &this.upgrade().with_context(|| "Dropped worktree")?,
1932                |this, _| {
1933                    anyhow::Ok::<postage::barrier::Receiver>(
1934                        this.as_local()
1935                            .with_context(|| "Worktree is not local")?
1936                            .refresh_entries_for_paths(paths_to_refresh.clone()),
1937                    )
1938                },
1939            )??;
1940
1941            cx.background_spawn(async move {
1942                refresh.next().await;
1943                anyhow::Ok(())
1944            })
1945            .await
1946            .log_err();
1947
1948            let this = this.upgrade().with_context(|| "Dropped worktree")?;
1949            cx.read_entity(&this, |this, _| {
1950                paths_to_refresh
1951                    .iter()
1952                    .filter_map(|path| Some(this.entry_for_path(path)?.id))
1953                    .collect()
1954            })
1955        })
1956    }
1957
1958    fn expand_entry(
1959        &self,
1960        entry_id: ProjectEntryId,
1961        cx: &Context<Worktree>,
1962    ) -> Option<Task<Result<()>>> {
1963        let path = self.entry_for_id(entry_id)?.path.clone();
1964        let mut refresh = self.refresh_entries_for_paths(vec![path]);
1965        Some(cx.background_spawn(async move {
1966            refresh.next().await;
1967            Ok(())
1968        }))
1969    }
1970
1971    fn expand_all_for_entry(
1972        &self,
1973        entry_id: ProjectEntryId,
1974        cx: &Context<Worktree>,
1975    ) -> Option<Task<Result<()>>> {
1976        let path = self.entry_for_id(entry_id).unwrap().path.clone();
1977        let mut rx = self.add_path_prefix_to_scan(path.clone());
1978        Some(cx.background_spawn(async move {
1979            rx.next().await;
1980            Ok(())
1981        }))
1982    }
1983
1984    fn refresh_entries_for_paths(&self, paths: Vec<Arc<Path>>) -> barrier::Receiver {
1985        let (tx, rx) = barrier::channel();
1986        self.scan_requests_tx
1987            .try_send(ScanRequest {
1988                relative_paths: paths,
1989                done: smallvec![tx],
1990            })
1991            .ok();
1992        rx
1993    }
1994
1995    #[cfg(feature = "test-support")]
1996    pub fn manually_refresh_entries_for_paths(&self, paths: Vec<Arc<Path>>) -> barrier::Receiver {
1997        self.refresh_entries_for_paths(paths)
1998    }
1999
2000    pub fn add_path_prefix_to_scan(&self, path_prefix: Arc<Path>) -> barrier::Receiver {
2001        let (tx, rx) = barrier::channel();
2002        self.path_prefixes_to_scan_tx
2003            .try_send(PathPrefixScanRequest {
2004                path: path_prefix,
2005                done: smallvec![tx],
2006            })
2007            .ok();
2008        rx
2009    }
2010
2011    fn refresh_entry(
2012        &self,
2013        path: Arc<Path>,
2014        old_path: Option<Arc<Path>>,
2015        cx: &Context<Worktree>,
2016    ) -> Task<Result<Option<Entry>>> {
2017        if self.settings.is_path_excluded(&path) {
2018            return Task::ready(Ok(None));
2019        }
2020        let paths = if let Some(old_path) = old_path.as_ref() {
2021            vec![old_path.clone(), path.clone()]
2022        } else {
2023            vec![path.clone()]
2024        };
2025        let t0 = Instant::now();
2026        let mut refresh = self.refresh_entries_for_paths(paths);
2027        cx.spawn(async move |this, cx| {
2028            refresh.recv().await;
2029            log::trace!("refreshed entry {path:?} in {:?}", t0.elapsed());
2030            let new_entry = this.read_with(cx, |this, _| {
2031                this.entry_for_path(path)
2032                    .cloned()
2033                    .context("reading path after update")
2034            })??;
2035            Ok(Some(new_entry))
2036        })
2037    }
2038
2039    fn observe_updates<F, Fut>(&mut self, project_id: u64, cx: &Context<Worktree>, callback: F)
2040    where
2041        F: 'static + Send + Fn(proto::UpdateWorktree) -> Fut,
2042        Fut: 'static + Send + Future<Output = bool>,
2043    {
2044        if let Some(observer) = self.update_observer.as_mut() {
2045            *observer.resume_updates.borrow_mut() = ();
2046            return;
2047        }
2048
2049        let (resume_updates_tx, mut resume_updates_rx) = watch::channel::<()>();
2050        let (snapshots_tx, mut snapshots_rx) =
2051            mpsc::unbounded::<(LocalSnapshot, UpdatedEntriesSet)>();
2052        snapshots_tx
2053            .unbounded_send((self.snapshot(), Arc::default()))
2054            .ok();
2055
2056        let worktree_id = cx.entity_id().as_u64();
2057        let _maintain_remote_snapshot = cx.background_spawn(async move {
2058            let mut is_first = true;
2059            while let Some((snapshot, entry_changes)) = snapshots_rx.next().await {
2060                let update = if is_first {
2061                    is_first = false;
2062                    snapshot.build_initial_update(project_id, worktree_id)
2063                } else {
2064                    snapshot.build_update(project_id, worktree_id, entry_changes)
2065                };
2066
2067                for update in proto::split_worktree_update(update) {
2068                    let _ = resume_updates_rx.try_recv();
2069                    loop {
2070                        let result = callback(update.clone());
2071                        if result.await {
2072                            break;
2073                        } else {
2074                            log::info!("waiting to resume updates");
2075                            if resume_updates_rx.next().await.is_none() {
2076                                return Some(());
2077                            }
2078                        }
2079                    }
2080                }
2081            }
2082            Some(())
2083        });
2084
2085        self.update_observer = Some(UpdateObservationState {
2086            snapshots_tx,
2087            resume_updates: resume_updates_tx,
2088            _maintain_remote_snapshot,
2089        });
2090    }
2091
2092    pub fn share_private_files(&mut self, cx: &Context<Worktree>) {
2093        self.share_private_files = true;
2094        self.restart_background_scanners(cx);
2095    }
2096
2097    fn update_abs_path_and_refresh(
2098        &mut self,
2099        new_path: Option<SanitizedPath>,
2100        cx: &Context<Worktree>,
2101    ) {
2102        if let Some(new_path) = new_path {
2103            self.snapshot.git_repositories = Default::default();
2104            self.snapshot.ignores_by_parent_abs_path = Default::default();
2105            let root_name = new_path
2106                .as_path()
2107                .file_name()
2108                .map_or(String::new(), |f| f.to_string_lossy().to_string());
2109            self.snapshot.update_abs_path(new_path, root_name);
2110        }
2111        self.restart_background_scanners(cx);
2112    }
2113}
2114
2115impl RemoteWorktree {
2116    pub fn project_id(&self) -> u64 {
2117        self.project_id
2118    }
2119
2120    pub fn client(&self) -> AnyProtoClient {
2121        self.client.clone()
2122    }
2123
2124    pub fn disconnected_from_host(&mut self) {
2125        self.updates_tx.take();
2126        self.snapshot_subscriptions.clear();
2127        self.disconnected = true;
2128    }
2129
2130    pub fn update_from_remote(&self, update: proto::UpdateWorktree) {
2131        if let Some(updates_tx) = &self.updates_tx {
2132            updates_tx
2133                .unbounded_send(update)
2134                .expect("consumer runs to completion");
2135        }
2136    }
2137
2138    fn observe_updates<F, Fut>(&mut self, project_id: u64, cx: &Context<Worktree>, callback: F)
2139    where
2140        F: 'static + Send + Fn(proto::UpdateWorktree) -> Fut,
2141        Fut: 'static + Send + Future<Output = bool>,
2142    {
2143        let (tx, mut rx) = mpsc::unbounded();
2144        let initial_update = self
2145            .snapshot
2146            .build_initial_update(project_id, self.id().to_proto());
2147        self.update_observer = Some(tx);
2148        cx.spawn(async move |this, cx| {
2149            let mut update = initial_update;
2150            'outer: loop {
2151                // SSH projects use a special project ID of 0, and we need to
2152                // remap it to the correct one here.
2153                update.project_id = project_id;
2154
2155                for chunk in split_worktree_update(update) {
2156                    if !callback(chunk).await {
2157                        break 'outer;
2158                    }
2159                }
2160
2161                if let Some(next_update) = rx.next().await {
2162                    update = next_update;
2163                } else {
2164                    break;
2165                }
2166            }
2167            this.update(cx, |this, _| {
2168                let this = this.as_remote_mut().unwrap();
2169                this.update_observer.take();
2170            })
2171        })
2172        .detach();
2173    }
2174
2175    fn observed_snapshot(&self, scan_id: usize) -> bool {
2176        self.completed_scan_id >= scan_id
2177    }
2178
2179    pub fn wait_for_snapshot(
2180        &mut self,
2181        scan_id: usize,
2182    ) -> impl Future<Output = Result<()>> + use<> {
2183        let (tx, rx) = oneshot::channel();
2184        if self.observed_snapshot(scan_id) {
2185            let _ = tx.send(());
2186        } else if self.disconnected {
2187            drop(tx);
2188        } else {
2189            match self
2190                .snapshot_subscriptions
2191                .binary_search_by_key(&scan_id, |probe| probe.0)
2192            {
2193                Ok(ix) | Err(ix) => self.snapshot_subscriptions.insert(ix, (scan_id, tx)),
2194            }
2195        }
2196
2197        async move {
2198            rx.await?;
2199            Ok(())
2200        }
2201    }
2202
2203    fn insert_entry(
2204        &mut self,
2205        entry: proto::Entry,
2206        scan_id: usize,
2207        cx: &Context<Worktree>,
2208    ) -> Task<Result<Entry>> {
2209        let wait_for_snapshot = self.wait_for_snapshot(scan_id);
2210        cx.spawn(async move |this, cx| {
2211            wait_for_snapshot.await?;
2212            this.update(cx, |worktree, _| {
2213                let worktree = worktree.as_remote_mut().unwrap();
2214                let snapshot = &mut worktree.background_snapshot.lock().0;
2215                let entry = snapshot.insert_entry(entry, &worktree.file_scan_inclusions);
2216                worktree.snapshot = snapshot.clone();
2217                entry
2218            })?
2219        })
2220    }
2221
2222    fn delete_entry(
2223        &self,
2224        entry_id: ProjectEntryId,
2225        trash: bool,
2226        cx: &Context<Worktree>,
2227    ) -> Option<Task<Result<()>>> {
2228        let response = self.client.request(proto::DeleteProjectEntry {
2229            project_id: self.project_id,
2230            entry_id: entry_id.to_proto(),
2231            use_trash: trash,
2232        });
2233        Some(cx.spawn(async move |this, cx| {
2234            let response = response.await?;
2235            let scan_id = response.worktree_scan_id as usize;
2236
2237            this.update(cx, move |this, _| {
2238                this.as_remote_mut().unwrap().wait_for_snapshot(scan_id)
2239            })?
2240            .await?;
2241
2242            this.update(cx, |this, _| {
2243                let this = this.as_remote_mut().unwrap();
2244                let snapshot = &mut this.background_snapshot.lock().0;
2245                snapshot.delete_entry(entry_id);
2246                this.snapshot = snapshot.clone();
2247            })
2248        }))
2249    }
2250
2251    fn rename_entry(
2252        &self,
2253        entry_id: ProjectEntryId,
2254        new_path: impl Into<Arc<Path>>,
2255        cx: &Context<Worktree>,
2256    ) -> Task<Result<CreatedEntry>> {
2257        let new_path: Arc<Path> = new_path.into();
2258        let response = self.client.request(proto::RenameProjectEntry {
2259            project_id: self.project_id,
2260            entry_id: entry_id.to_proto(),
2261            new_path: new_path.as_ref().to_proto(),
2262        });
2263        cx.spawn(async move |this, cx| {
2264            let response = response.await?;
2265            match response.entry {
2266                Some(entry) => this
2267                    .update(cx, |this, cx| {
2268                        this.as_remote_mut().unwrap().insert_entry(
2269                            entry,
2270                            response.worktree_scan_id as usize,
2271                            cx,
2272                        )
2273                    })?
2274                    .await
2275                    .map(CreatedEntry::Included),
2276                None => {
2277                    let abs_path = this.read_with(cx, |worktree, _| {
2278                        worktree
2279                            .absolutize(&new_path)
2280                            .with_context(|| format!("absolutizing {new_path:?}"))
2281                    })??;
2282                    Ok(CreatedEntry::Excluded { abs_path })
2283                }
2284            }
2285        })
2286    }
2287
2288    fn copy_external_entries(
2289        &self,
2290        target_directory: Arc<Path>,
2291        paths_to_copy: Vec<Arc<Path>>,
2292        local_fs: Arc<dyn Fs>,
2293        cx: &Context<Worktree>,
2294    ) -> Task<anyhow::Result<Vec<ProjectEntryId>>> {
2295        let client = self.client.clone();
2296        let worktree_id = self.id().to_proto();
2297        let project_id = self.project_id;
2298
2299        cx.background_spawn(async move {
2300            let mut requests = Vec::new();
2301            for root_path_to_copy in paths_to_copy {
2302                let Some(filename) = root_path_to_copy.file_name() else {
2303                    continue;
2304                };
2305                for (abs_path, is_directory) in
2306                    read_dir_items(local_fs.as_ref(), &root_path_to_copy).await?
2307                {
2308                    let Ok(relative_path) = abs_path.strip_prefix(&root_path_to_copy) else {
2309                        continue;
2310                    };
2311                    let content = if is_directory {
2312                        None
2313                    } else {
2314                        Some(local_fs.load_bytes(&abs_path).await?)
2315                    };
2316
2317                    let mut target_path = target_directory.join(filename);
2318                    if relative_path.file_name().is_some() {
2319                        target_path.push(relative_path)
2320                    }
2321
2322                    requests.push(proto::CreateProjectEntry {
2323                        project_id,
2324                        worktree_id,
2325                        path: target_path.to_string_lossy().to_string(),
2326                        is_directory,
2327                        content,
2328                    });
2329                }
2330            }
2331            requests.sort_unstable_by(|a, b| a.path.cmp(&b.path));
2332            requests.dedup();
2333
2334            let mut copied_entry_ids = Vec::new();
2335            for request in requests {
2336                let response = client.request(request).await?;
2337                copied_entry_ids.extend(response.entry.map(|e| ProjectEntryId::from_proto(e.id)));
2338            }
2339
2340            Ok(copied_entry_ids)
2341        })
2342    }
2343}
2344
2345impl Snapshot {
2346    pub fn new(id: u64, root_name: String, abs_path: Arc<Path>) -> Self {
2347        Snapshot {
2348            id: WorktreeId::from_usize(id as usize),
2349            abs_path: abs_path.into(),
2350            root_char_bag: root_name.chars().map(|c| c.to_ascii_lowercase()).collect(),
2351            root_name,
2352            always_included_entries: Default::default(),
2353            entries_by_path: Default::default(),
2354            entries_by_id: Default::default(),
2355            scan_id: 1,
2356            completed_scan_id: 0,
2357        }
2358    }
2359
2360    pub fn id(&self) -> WorktreeId {
2361        self.id
2362    }
2363
2364    // TODO:
2365    // Consider the following:
2366    //
2367    // ```rust
2368    // let abs_path: Arc<Path> = snapshot.abs_path(); // e.g. "C:\Users\user\Desktop\project"
2369    // let some_non_trimmed_path = Path::new("\\\\?\\C:\\Users\\user\\Desktop\\project\\main.rs");
2370    // // The caller perform some actions here:
2371    // some_non_trimmed_path.strip_prefix(abs_path);  // This fails
2372    // some_non_trimmed_path.starts_with(abs_path);   // This fails too
2373    // ```
2374    //
2375    // This is definitely a bug, but it's not clear if we should handle it here or not.
2376    pub fn abs_path(&self) -> &Arc<Path> {
2377        self.abs_path.as_path()
2378    }
2379
2380    fn build_initial_update(&self, project_id: u64, worktree_id: u64) -> proto::UpdateWorktree {
2381        let mut updated_entries = self
2382            .entries_by_path
2383            .iter()
2384            .map(proto::Entry::from)
2385            .collect::<Vec<_>>();
2386        updated_entries.sort_unstable_by_key(|e| e.id);
2387
2388        proto::UpdateWorktree {
2389            project_id,
2390            worktree_id,
2391            abs_path: self.abs_path().to_proto(),
2392            root_name: self.root_name().to_string(),
2393            updated_entries,
2394            removed_entries: Vec::new(),
2395            scan_id: self.scan_id as u64,
2396            is_last_update: self.completed_scan_id == self.scan_id,
2397            // Sent in separate messages.
2398            updated_repositories: Vec::new(),
2399            removed_repositories: Vec::new(),
2400        }
2401    }
2402
2403    pub fn work_directory_abs_path(&self, work_directory: &WorkDirectory) -> Result<PathBuf> {
2404        match work_directory {
2405            WorkDirectory::InProject { relative_path } => self.absolutize(relative_path),
2406            WorkDirectory::AboveProject { absolute_path, .. } => {
2407                Ok(absolute_path.as_ref().to_owned())
2408            }
2409        }
2410    }
2411
2412    pub fn absolutize(&self, path: &Path) -> Result<PathBuf> {
2413        if path
2414            .components()
2415            .any(|component| !matches!(component, std::path::Component::Normal(_)))
2416        {
2417            anyhow::bail!("invalid path");
2418        }
2419        if path.file_name().is_some() {
2420            Ok(self.abs_path.as_path().join(path))
2421        } else {
2422            Ok(self.abs_path.as_path().to_path_buf())
2423        }
2424    }
2425
2426    pub fn contains_entry(&self, entry_id: ProjectEntryId) -> bool {
2427        self.entries_by_id.get(&entry_id, &()).is_some()
2428    }
2429
2430    fn insert_entry(
2431        &mut self,
2432        entry: proto::Entry,
2433        always_included_paths: &PathMatcher,
2434    ) -> Result<Entry> {
2435        let entry = Entry::try_from((&self.root_char_bag, always_included_paths, entry))?;
2436        let old_entry = self.entries_by_id.insert_or_replace(
2437            PathEntry {
2438                id: entry.id,
2439                path: entry.path.clone(),
2440                is_ignored: entry.is_ignored,
2441                scan_id: 0,
2442            },
2443            &(),
2444        );
2445        if let Some(old_entry) = old_entry {
2446            self.entries_by_path.remove(&PathKey(old_entry.path), &());
2447        }
2448        self.entries_by_path.insert_or_replace(entry.clone(), &());
2449        Ok(entry)
2450    }
2451
2452    fn delete_entry(&mut self, entry_id: ProjectEntryId) -> Option<Arc<Path>> {
2453        let removed_entry = self.entries_by_id.remove(&entry_id, &())?;
2454        self.entries_by_path = {
2455            let mut cursor = self.entries_by_path.cursor::<TraversalProgress>(&());
2456            let mut new_entries_by_path =
2457                cursor.slice(&TraversalTarget::path(&removed_entry.path), Bias::Left);
2458            while let Some(entry) = cursor.item() {
2459                if entry.path.starts_with(&removed_entry.path) {
2460                    self.entries_by_id.remove(&entry.id, &());
2461                    cursor.next();
2462                } else {
2463                    break;
2464                }
2465            }
2466            new_entries_by_path.append(cursor.suffix(), &());
2467            new_entries_by_path
2468        };
2469
2470        Some(removed_entry.path)
2471    }
2472
2473    fn update_abs_path(&mut self, abs_path: SanitizedPath, root_name: String) {
2474        self.abs_path = abs_path;
2475        if root_name != self.root_name {
2476            self.root_char_bag = root_name.chars().map(|c| c.to_ascii_lowercase()).collect();
2477            self.root_name = root_name;
2478        }
2479    }
2480
2481    fn apply_remote_update(
2482        &mut self,
2483        update: proto::UpdateWorktree,
2484        always_included_paths: &PathMatcher,
2485    ) -> Result<()> {
2486        log::debug!(
2487            "applying remote worktree update. {} entries updated, {} removed",
2488            update.updated_entries.len(),
2489            update.removed_entries.len()
2490        );
2491        self.update_abs_path(
2492            SanitizedPath::from(PathBuf::from_proto(update.abs_path)),
2493            update.root_name,
2494        );
2495
2496        let mut entries_by_path_edits = Vec::new();
2497        let mut entries_by_id_edits = Vec::new();
2498
2499        for entry_id in update.removed_entries {
2500            let entry_id = ProjectEntryId::from_proto(entry_id);
2501            entries_by_id_edits.push(Edit::Remove(entry_id));
2502            if let Some(entry) = self.entry_for_id(entry_id) {
2503                entries_by_path_edits.push(Edit::Remove(PathKey(entry.path.clone())));
2504            }
2505        }
2506
2507        for entry in update.updated_entries {
2508            let entry = Entry::try_from((&self.root_char_bag, always_included_paths, entry))?;
2509            if let Some(PathEntry { path, .. }) = self.entries_by_id.get(&entry.id, &()) {
2510                entries_by_path_edits.push(Edit::Remove(PathKey(path.clone())));
2511            }
2512            if let Some(old_entry) = self.entries_by_path.get(&PathKey(entry.path.clone()), &()) {
2513                if old_entry.id != entry.id {
2514                    entries_by_id_edits.push(Edit::Remove(old_entry.id));
2515                }
2516            }
2517            entries_by_id_edits.push(Edit::Insert(PathEntry {
2518                id: entry.id,
2519                path: entry.path.clone(),
2520                is_ignored: entry.is_ignored,
2521                scan_id: 0,
2522            }));
2523            entries_by_path_edits.push(Edit::Insert(entry));
2524        }
2525
2526        self.entries_by_path.edit(entries_by_path_edits, &());
2527        self.entries_by_id.edit(entries_by_id_edits, &());
2528
2529        self.scan_id = update.scan_id as usize;
2530        if update.is_last_update {
2531            self.completed_scan_id = update.scan_id as usize;
2532        }
2533
2534        Ok(())
2535    }
2536
2537    pub fn entry_count(&self) -> usize {
2538        self.entries_by_path.summary().count
2539    }
2540
2541    pub fn visible_entry_count(&self) -> usize {
2542        self.entries_by_path.summary().non_ignored_count
2543    }
2544
2545    pub fn dir_count(&self) -> usize {
2546        let summary = self.entries_by_path.summary();
2547        summary.count - summary.file_count
2548    }
2549
2550    pub fn visible_dir_count(&self) -> usize {
2551        let summary = self.entries_by_path.summary();
2552        summary.non_ignored_count - summary.non_ignored_file_count
2553    }
2554
2555    pub fn file_count(&self) -> usize {
2556        self.entries_by_path.summary().file_count
2557    }
2558
2559    pub fn visible_file_count(&self) -> usize {
2560        self.entries_by_path.summary().non_ignored_file_count
2561    }
2562
2563    fn traverse_from_offset(
2564        &self,
2565        include_files: bool,
2566        include_dirs: bool,
2567        include_ignored: bool,
2568        start_offset: usize,
2569    ) -> Traversal<'_> {
2570        let mut cursor = self.entries_by_path.cursor(&());
2571        cursor.seek(
2572            &TraversalTarget::Count {
2573                count: start_offset,
2574                include_files,
2575                include_dirs,
2576                include_ignored,
2577            },
2578            Bias::Right,
2579        );
2580        Traversal {
2581            snapshot: self,
2582            cursor,
2583            include_files,
2584            include_dirs,
2585            include_ignored,
2586        }
2587    }
2588
2589    pub fn traverse_from_path(
2590        &self,
2591        include_files: bool,
2592        include_dirs: bool,
2593        include_ignored: bool,
2594        path: &Path,
2595    ) -> Traversal<'_> {
2596        Traversal::new(self, include_files, include_dirs, include_ignored, path)
2597    }
2598
2599    pub fn files(&self, include_ignored: bool, start: usize) -> Traversal<'_> {
2600        self.traverse_from_offset(true, false, include_ignored, start)
2601    }
2602
2603    pub fn directories(&self, include_ignored: bool, start: usize) -> Traversal<'_> {
2604        self.traverse_from_offset(false, true, include_ignored, start)
2605    }
2606
2607    pub fn entries(&self, include_ignored: bool, start: usize) -> Traversal<'_> {
2608        self.traverse_from_offset(true, true, include_ignored, start)
2609    }
2610
2611    pub fn paths(&self) -> impl Iterator<Item = &Arc<Path>> {
2612        let empty_path = Path::new("");
2613        self.entries_by_path
2614            .cursor::<()>(&())
2615            .filter(move |entry| entry.path.as_ref() != empty_path)
2616            .map(|entry| &entry.path)
2617    }
2618
2619    pub fn child_entries<'a>(&'a self, parent_path: &'a Path) -> ChildEntriesIter<'a> {
2620        let options = ChildEntriesOptions {
2621            include_files: true,
2622            include_dirs: true,
2623            include_ignored: true,
2624        };
2625        self.child_entries_with_options(parent_path, options)
2626    }
2627
2628    pub fn child_entries_with_options<'a>(
2629        &'a self,
2630        parent_path: &'a Path,
2631        options: ChildEntriesOptions,
2632    ) -> ChildEntriesIter<'a> {
2633        let mut cursor = self.entries_by_path.cursor(&());
2634        cursor.seek(&TraversalTarget::path(parent_path), Bias::Right);
2635        let traversal = Traversal {
2636            snapshot: self,
2637            cursor,
2638            include_files: options.include_files,
2639            include_dirs: options.include_dirs,
2640            include_ignored: options.include_ignored,
2641        };
2642        ChildEntriesIter {
2643            traversal,
2644            parent_path,
2645        }
2646    }
2647
2648    pub fn root_entry(&self) -> Option<&Entry> {
2649        self.entries_by_path.first()
2650    }
2651
2652    /// TODO: what's the difference between `root_dir` and `abs_path`?
2653    /// is there any? if so, document it.
2654    pub fn root_dir(&self) -> Option<Arc<Path>> {
2655        self.root_entry()
2656            .filter(|entry| entry.is_dir())
2657            .map(|_| self.abs_path().clone())
2658    }
2659
2660    pub fn root_name(&self) -> &str {
2661        &self.root_name
2662    }
2663
2664    pub fn scan_id(&self) -> usize {
2665        self.scan_id
2666    }
2667
2668    pub fn entry_for_path(&self, path: impl AsRef<Path>) -> Option<&Entry> {
2669        let path = path.as_ref();
2670        debug_assert!(path.is_relative());
2671        self.traverse_from_path(true, true, true, path)
2672            .entry()
2673            .and_then(|entry| {
2674                if entry.path.as_ref() == path {
2675                    Some(entry)
2676                } else {
2677                    None
2678                }
2679            })
2680    }
2681
2682    pub fn entry_for_id(&self, id: ProjectEntryId) -> Option<&Entry> {
2683        let entry = self.entries_by_id.get(&id, &())?;
2684        self.entry_for_path(&entry.path)
2685    }
2686
2687    pub fn inode_for_path(&self, path: impl AsRef<Path>) -> Option<u64> {
2688        self.entry_for_path(path.as_ref()).map(|e| e.inode)
2689    }
2690}
2691
2692impl LocalSnapshot {
2693    fn local_repo_for_work_directory_path(&self, path: &Path) -> Option<&LocalRepositoryEntry> {
2694        self.git_repositories
2695            .iter()
2696            .map(|(_, entry)| entry)
2697            .find(|entry| entry.work_directory.path_key() == PathKey(path.into()))
2698    }
2699
2700    fn build_update(
2701        &self,
2702        project_id: u64,
2703        worktree_id: u64,
2704        entry_changes: UpdatedEntriesSet,
2705    ) -> proto::UpdateWorktree {
2706        let mut updated_entries = Vec::new();
2707        let mut removed_entries = Vec::new();
2708
2709        for (_, entry_id, path_change) in entry_changes.iter() {
2710            if let PathChange::Removed = path_change {
2711                removed_entries.push(entry_id.0 as u64);
2712            } else if let Some(entry) = self.entry_for_id(*entry_id) {
2713                updated_entries.push(proto::Entry::from(entry));
2714            }
2715        }
2716
2717        removed_entries.sort_unstable();
2718        updated_entries.sort_unstable_by_key(|e| e.id);
2719
2720        // TODO - optimize, knowing that removed_entries are sorted.
2721        removed_entries.retain(|id| updated_entries.binary_search_by_key(id, |e| e.id).is_err());
2722
2723        proto::UpdateWorktree {
2724            project_id,
2725            worktree_id,
2726            abs_path: self.abs_path().to_proto(),
2727            root_name: self.root_name().to_string(),
2728            updated_entries,
2729            removed_entries,
2730            scan_id: self.scan_id as u64,
2731            is_last_update: self.completed_scan_id == self.scan_id,
2732            // Sent in separate messages.
2733            updated_repositories: Vec::new(),
2734            removed_repositories: Vec::new(),
2735        }
2736    }
2737
2738    fn insert_entry(&mut self, mut entry: Entry, fs: &dyn Fs) -> Entry {
2739        if entry.is_file() && entry.path.file_name() == Some(&GITIGNORE) {
2740            let abs_path = self.abs_path.as_path().join(&entry.path);
2741            match smol::block_on(build_gitignore(&abs_path, fs)) {
2742                Ok(ignore) => {
2743                    self.ignores_by_parent_abs_path
2744                        .insert(abs_path.parent().unwrap().into(), (Arc::new(ignore), true));
2745                }
2746                Err(error) => {
2747                    log::error!(
2748                        "error loading .gitignore file {:?} - {:?}",
2749                        &entry.path,
2750                        error
2751                    );
2752                }
2753            }
2754        }
2755
2756        if entry.kind == EntryKind::PendingDir {
2757            if let Some(existing_entry) =
2758                self.entries_by_path.get(&PathKey(entry.path.clone()), &())
2759            {
2760                entry.kind = existing_entry.kind;
2761            }
2762        }
2763
2764        let scan_id = self.scan_id;
2765        let removed = self.entries_by_path.insert_or_replace(entry.clone(), &());
2766        if let Some(removed) = removed {
2767            if removed.id != entry.id {
2768                self.entries_by_id.remove(&removed.id, &());
2769            }
2770        }
2771        self.entries_by_id.insert_or_replace(
2772            PathEntry {
2773                id: entry.id,
2774                path: entry.path.clone(),
2775                is_ignored: entry.is_ignored,
2776                scan_id,
2777            },
2778            &(),
2779        );
2780
2781        entry
2782    }
2783
2784    fn ancestor_inodes_for_path(&self, path: &Path) -> TreeSet<u64> {
2785        let mut inodes = TreeSet::default();
2786        for ancestor in path.ancestors().skip(1) {
2787            if let Some(entry) = self.entry_for_path(ancestor) {
2788                inodes.insert(entry.inode);
2789            }
2790        }
2791        inodes
2792    }
2793
2794    fn ignore_stack_for_abs_path(&self, abs_path: &Path, is_dir: bool) -> Arc<IgnoreStack> {
2795        let mut new_ignores = Vec::new();
2796        for (index, ancestor) in abs_path.ancestors().enumerate() {
2797            if index > 0 {
2798                if let Some((ignore, _)) = self.ignores_by_parent_abs_path.get(ancestor) {
2799                    new_ignores.push((ancestor, Some(ignore.clone())));
2800                } else {
2801                    new_ignores.push((ancestor, None));
2802                }
2803            }
2804            if ancestor.join(*DOT_GIT).exists() {
2805                break;
2806            }
2807        }
2808
2809        let mut ignore_stack = IgnoreStack::none();
2810        for (parent_abs_path, ignore) in new_ignores.into_iter().rev() {
2811            if ignore_stack.is_abs_path_ignored(parent_abs_path, true) {
2812                ignore_stack = IgnoreStack::all();
2813                break;
2814            } else if let Some(ignore) = ignore {
2815                ignore_stack = ignore_stack.append(parent_abs_path.into(), ignore);
2816            }
2817        }
2818
2819        if ignore_stack.is_abs_path_ignored(abs_path, is_dir) {
2820            ignore_stack = IgnoreStack::all();
2821        }
2822
2823        ignore_stack
2824    }
2825
2826    #[cfg(test)]
2827    fn expanded_entries(&self) -> impl Iterator<Item = &Entry> {
2828        self.entries_by_path
2829            .cursor::<()>(&())
2830            .filter(|entry| entry.kind == EntryKind::Dir && (entry.is_external || entry.is_ignored))
2831    }
2832
2833    #[cfg(test)]
2834    pub fn check_invariants(&self, git_state: bool) {
2835        use pretty_assertions::assert_eq;
2836
2837        assert_eq!(
2838            self.entries_by_path
2839                .cursor::<()>(&())
2840                .map(|e| (&e.path, e.id))
2841                .collect::<Vec<_>>(),
2842            self.entries_by_id
2843                .cursor::<()>(&())
2844                .map(|e| (&e.path, e.id))
2845                .collect::<collections::BTreeSet<_>>()
2846                .into_iter()
2847                .collect::<Vec<_>>(),
2848            "entries_by_path and entries_by_id are inconsistent"
2849        );
2850
2851        let mut files = self.files(true, 0);
2852        let mut visible_files = self.files(false, 0);
2853        for entry in self.entries_by_path.cursor::<()>(&()) {
2854            if entry.is_file() {
2855                assert_eq!(files.next().unwrap().inode, entry.inode);
2856                if (!entry.is_ignored && !entry.is_external) || entry.is_always_included {
2857                    assert_eq!(visible_files.next().unwrap().inode, entry.inode);
2858                }
2859            }
2860        }
2861
2862        assert!(files.next().is_none());
2863        assert!(visible_files.next().is_none());
2864
2865        let mut bfs_paths = Vec::new();
2866        let mut stack = self
2867            .root_entry()
2868            .map(|e| e.path.as_ref())
2869            .into_iter()
2870            .collect::<Vec<_>>();
2871        while let Some(path) = stack.pop() {
2872            bfs_paths.push(path);
2873            let ix = stack.len();
2874            for child_entry in self.child_entries(path) {
2875                stack.insert(ix, &child_entry.path);
2876            }
2877        }
2878
2879        let dfs_paths_via_iter = self
2880            .entries_by_path
2881            .cursor::<()>(&())
2882            .map(|e| e.path.as_ref())
2883            .collect::<Vec<_>>();
2884        assert_eq!(bfs_paths, dfs_paths_via_iter);
2885
2886        let dfs_paths_via_traversal = self
2887            .entries(true, 0)
2888            .map(|e| e.path.as_ref())
2889            .collect::<Vec<_>>();
2890        assert_eq!(dfs_paths_via_traversal, dfs_paths_via_iter);
2891
2892        if git_state {
2893            for ignore_parent_abs_path in self.ignores_by_parent_abs_path.keys() {
2894                let ignore_parent_path = ignore_parent_abs_path
2895                    .strip_prefix(self.abs_path.as_path())
2896                    .unwrap();
2897                assert!(self.entry_for_path(ignore_parent_path).is_some());
2898                assert!(
2899                    self.entry_for_path(ignore_parent_path.join(*GITIGNORE))
2900                        .is_some()
2901                );
2902            }
2903        }
2904    }
2905
2906    #[cfg(test)]
2907    pub fn entries_without_ids(&self, include_ignored: bool) -> Vec<(&Path, u64, bool)> {
2908        let mut paths = Vec::new();
2909        for entry in self.entries_by_path.cursor::<()>(&()) {
2910            if include_ignored || !entry.is_ignored {
2911                paths.push((entry.path.as_ref(), entry.inode, entry.is_ignored));
2912            }
2913        }
2914        paths.sort_by(|a, b| a.0.cmp(b.0));
2915        paths
2916    }
2917}
2918
2919impl BackgroundScannerState {
2920    fn should_scan_directory(&self, entry: &Entry) -> bool {
2921        (!entry.is_external && (!entry.is_ignored || entry.is_always_included))
2922            || entry.path.file_name() == Some(*DOT_GIT)
2923            || entry.path.file_name() == Some(local_settings_folder_relative_path().as_os_str())
2924            || entry.path.file_name() == Some(local_vscode_folder_relative_path().as_os_str())
2925            || self.scanned_dirs.contains(&entry.id) // If we've ever scanned it, keep scanning
2926            || self
2927                .paths_to_scan
2928                .iter()
2929                .any(|p| p.starts_with(&entry.path))
2930            || self
2931                .path_prefixes_to_scan
2932                .iter()
2933                .any(|p| entry.path.starts_with(p))
2934    }
2935
2936    fn enqueue_scan_dir(&self, abs_path: Arc<Path>, entry: &Entry, scan_job_tx: &Sender<ScanJob>) {
2937        let path = entry.path.clone();
2938        let ignore_stack = self.snapshot.ignore_stack_for_abs_path(&abs_path, true);
2939        let mut ancestor_inodes = self.snapshot.ancestor_inodes_for_path(&path);
2940
2941        if !ancestor_inodes.contains(&entry.inode) {
2942            ancestor_inodes.insert(entry.inode);
2943            scan_job_tx
2944                .try_send(ScanJob {
2945                    abs_path,
2946                    path,
2947                    ignore_stack,
2948                    scan_queue: scan_job_tx.clone(),
2949                    ancestor_inodes,
2950                    is_external: entry.is_external,
2951                })
2952                .unwrap();
2953        }
2954    }
2955
2956    fn reuse_entry_id(&mut self, entry: &mut Entry) {
2957        if let Some(mtime) = entry.mtime {
2958            // If an entry with the same inode was removed from the worktree during this scan,
2959            // then it *might* represent the same file or directory. But the OS might also have
2960            // re-used the inode for a completely different file or directory.
2961            //
2962            // Conditionally reuse the old entry's id:
2963            // * if the mtime is the same, the file was probably been renamed.
2964            // * if the path is the same, the file may just have been updated
2965            if let Some(removed_entry) = self.removed_entries.remove(&entry.inode) {
2966                if removed_entry.mtime == Some(mtime) || removed_entry.path == entry.path {
2967                    entry.id = removed_entry.id;
2968                }
2969            } else if let Some(existing_entry) = self.snapshot.entry_for_path(&entry.path) {
2970                entry.id = existing_entry.id;
2971            }
2972        }
2973    }
2974
2975    fn insert_entry(&mut self, mut entry: Entry, fs: &dyn Fs, watcher: &dyn Watcher) -> Entry {
2976        self.reuse_entry_id(&mut entry);
2977        let entry = self.snapshot.insert_entry(entry, fs);
2978        if entry.path.file_name() == Some(&DOT_GIT) {
2979            self.insert_git_repository(entry.path.clone(), fs, watcher);
2980        }
2981
2982        #[cfg(test)]
2983        self.snapshot.check_invariants(false);
2984
2985        entry
2986    }
2987
2988    fn populate_dir(
2989        &mut self,
2990        parent_path: &Arc<Path>,
2991        entries: impl IntoIterator<Item = Entry>,
2992        ignore: Option<Arc<Gitignore>>,
2993    ) {
2994        let mut parent_entry = if let Some(parent_entry) = self
2995            .snapshot
2996            .entries_by_path
2997            .get(&PathKey(parent_path.clone()), &())
2998        {
2999            parent_entry.clone()
3000        } else {
3001            log::warn!(
3002                "populating a directory {:?} that has been removed",
3003                parent_path
3004            );
3005            return;
3006        };
3007
3008        match parent_entry.kind {
3009            EntryKind::PendingDir | EntryKind::UnloadedDir => parent_entry.kind = EntryKind::Dir,
3010            EntryKind::Dir => {}
3011            _ => return,
3012        }
3013
3014        if let Some(ignore) = ignore {
3015            let abs_parent_path = self.snapshot.abs_path.as_path().join(parent_path).into();
3016            self.snapshot
3017                .ignores_by_parent_abs_path
3018                .insert(abs_parent_path, (ignore, false));
3019        }
3020
3021        let parent_entry_id = parent_entry.id;
3022        self.scanned_dirs.insert(parent_entry_id);
3023        let mut entries_by_path_edits = vec![Edit::Insert(parent_entry)];
3024        let mut entries_by_id_edits = Vec::new();
3025
3026        for entry in entries {
3027            entries_by_id_edits.push(Edit::Insert(PathEntry {
3028                id: entry.id,
3029                path: entry.path.clone(),
3030                is_ignored: entry.is_ignored,
3031                scan_id: self.snapshot.scan_id,
3032            }));
3033            entries_by_path_edits.push(Edit::Insert(entry));
3034        }
3035
3036        self.snapshot
3037            .entries_by_path
3038            .edit(entries_by_path_edits, &());
3039        self.snapshot.entries_by_id.edit(entries_by_id_edits, &());
3040
3041        if let Err(ix) = self.changed_paths.binary_search(parent_path) {
3042            self.changed_paths.insert(ix, parent_path.clone());
3043        }
3044
3045        #[cfg(test)]
3046        self.snapshot.check_invariants(false);
3047    }
3048
3049    fn remove_path(&mut self, path: &Path) {
3050        log::trace!("background scanner removing path {path:?}");
3051        let mut new_entries;
3052        let removed_entries;
3053        {
3054            let mut cursor = self
3055                .snapshot
3056                .entries_by_path
3057                .cursor::<TraversalProgress>(&());
3058            new_entries = cursor.slice(&TraversalTarget::path(path), Bias::Left);
3059            removed_entries = cursor.slice(&TraversalTarget::successor(path), Bias::Left);
3060            new_entries.append(cursor.suffix(), &());
3061        }
3062        self.snapshot.entries_by_path = new_entries;
3063
3064        let mut removed_ids = Vec::with_capacity(removed_entries.summary().count);
3065        for entry in removed_entries.cursor::<()>(&()) {
3066            match self.removed_entries.entry(entry.inode) {
3067                hash_map::Entry::Occupied(mut e) => {
3068                    let prev_removed_entry = e.get_mut();
3069                    if entry.id > prev_removed_entry.id {
3070                        *prev_removed_entry = entry.clone();
3071                    }
3072                }
3073                hash_map::Entry::Vacant(e) => {
3074                    e.insert(entry.clone());
3075                }
3076            }
3077
3078            if entry.path.file_name() == Some(&GITIGNORE) {
3079                let abs_parent_path = self
3080                    .snapshot
3081                    .abs_path
3082                    .as_path()
3083                    .join(entry.path.parent().unwrap());
3084                if let Some((_, needs_update)) = self
3085                    .snapshot
3086                    .ignores_by_parent_abs_path
3087                    .get_mut(abs_parent_path.as_path())
3088                {
3089                    *needs_update = true;
3090                }
3091            }
3092
3093            if let Err(ix) = removed_ids.binary_search(&entry.id) {
3094                removed_ids.insert(ix, entry.id);
3095            }
3096        }
3097
3098        self.snapshot.entries_by_id.edit(
3099            removed_ids.iter().map(|&id| Edit::Remove(id)).collect(),
3100            &(),
3101        );
3102        self.snapshot
3103            .git_repositories
3104            .retain(|id, _| removed_ids.binary_search(id).is_err());
3105
3106        #[cfg(test)]
3107        self.snapshot.check_invariants(false);
3108    }
3109
3110    fn insert_git_repository(
3111        &mut self,
3112        dot_git_path: Arc<Path>,
3113        fs: &dyn Fs,
3114        watcher: &dyn Watcher,
3115    ) {
3116        let work_dir_path: Arc<Path> = match dot_git_path.parent() {
3117            Some(parent_dir) => {
3118                // Guard against repositories inside the repository metadata
3119                if parent_dir.iter().any(|component| component == *DOT_GIT) {
3120                    log::debug!(
3121                        "not building git repository for nested `.git` directory, `.git` path in the worktree: {dot_git_path:?}"
3122                    );
3123                    return;
3124                };
3125
3126                parent_dir.into()
3127            }
3128            None => {
3129                // `dot_git_path.parent().is_none()` means `.git` directory is the opened worktree itself,
3130                // no files inside that directory are tracked by git, so no need to build the repo around it
3131                log::debug!(
3132                    "not building git repository for the worktree itself, `.git` path in the worktree: {dot_git_path:?}"
3133                );
3134                return;
3135            }
3136        };
3137
3138        self.insert_git_repository_for_path(
3139            WorkDirectory::InProject {
3140                relative_path: work_dir_path,
3141            },
3142            dot_git_path,
3143            fs,
3144            watcher,
3145        );
3146    }
3147
3148    fn insert_git_repository_for_path(
3149        &mut self,
3150        work_directory: WorkDirectory,
3151        dot_git_path: Arc<Path>,
3152        fs: &dyn Fs,
3153        watcher: &dyn Watcher,
3154    ) -> Option<LocalRepositoryEntry> {
3155        let work_dir_entry = self.snapshot.entry_for_path(work_directory.path_key().0)?;
3156        let work_directory_abs_path = self
3157            .snapshot
3158            .work_directory_abs_path(&work_directory)
3159            .log_err()?;
3160
3161        if self
3162            .snapshot
3163            .git_repositories
3164            .get(&work_dir_entry.id)
3165            .is_some()
3166        {
3167            log::trace!("existing git repository for {work_directory:?}");
3168            return None;
3169        }
3170
3171        let dot_git_abs_path: Arc<Path> = self
3172            .snapshot
3173            .abs_path
3174            .as_path()
3175            .join(&dot_git_path)
3176            .as_path()
3177            .into();
3178
3179        let (repository_dir_abs_path, common_dir_abs_path) =
3180            discover_git_paths(&dot_git_abs_path, fs);
3181        watcher.add(&common_dir_abs_path).log_err();
3182        if !repository_dir_abs_path.starts_with(&common_dir_abs_path) {
3183            watcher.add(&repository_dir_abs_path).log_err();
3184        }
3185
3186        let work_directory_id = work_dir_entry.id;
3187
3188        let local_repository = LocalRepositoryEntry {
3189            work_directory_id,
3190            work_directory,
3191            work_directory_abs_path: work_directory_abs_path.as_path().into(),
3192            git_dir_scan_id: 0,
3193            dot_git_abs_path,
3194            common_dir_abs_path,
3195            repository_dir_abs_path,
3196        };
3197
3198        self.snapshot
3199            .git_repositories
3200            .insert(work_directory_id, local_repository.clone());
3201
3202        log::trace!("inserting new local git repository");
3203        Some(local_repository)
3204    }
3205}
3206
3207async fn is_git_dir(path: &Path, fs: &dyn Fs) -> bool {
3208    if path.file_name() == Some(&*DOT_GIT) {
3209        return true;
3210    }
3211
3212    // If we're in a bare repository, we are not inside a `.git` folder. In a
3213    // bare repository, the root folder contains what would normally be in the
3214    // `.git` folder.
3215    let head_metadata = fs.metadata(&path.join("HEAD")).await;
3216    if !matches!(head_metadata, Ok(Some(_))) {
3217        return false;
3218    }
3219    let config_metadata = fs.metadata(&path.join("config")).await;
3220    matches!(config_metadata, Ok(Some(_)))
3221}
3222
3223async fn build_gitignore(abs_path: &Path, fs: &dyn Fs) -> Result<Gitignore> {
3224    let contents = fs.load(abs_path).await?;
3225    let parent = abs_path.parent().unwrap_or_else(|| Path::new("/"));
3226    let mut builder = GitignoreBuilder::new(parent);
3227    for line in contents.lines() {
3228        builder.add_line(Some(abs_path.into()), line)?;
3229    }
3230    Ok(builder.build()?)
3231}
3232
3233impl Deref for Worktree {
3234    type Target = Snapshot;
3235
3236    fn deref(&self) -> &Self::Target {
3237        match self {
3238            Worktree::Local(worktree) => &worktree.snapshot,
3239            Worktree::Remote(worktree) => &worktree.snapshot,
3240        }
3241    }
3242}
3243
3244impl Deref for LocalWorktree {
3245    type Target = LocalSnapshot;
3246
3247    fn deref(&self) -> &Self::Target {
3248        &self.snapshot
3249    }
3250}
3251
3252impl Deref for RemoteWorktree {
3253    type Target = Snapshot;
3254
3255    fn deref(&self) -> &Self::Target {
3256        &self.snapshot
3257    }
3258}
3259
3260impl fmt::Debug for LocalWorktree {
3261    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
3262        self.snapshot.fmt(f)
3263    }
3264}
3265
3266impl fmt::Debug for Snapshot {
3267    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
3268        struct EntriesById<'a>(&'a SumTree<PathEntry>);
3269        struct EntriesByPath<'a>(&'a SumTree<Entry>);
3270
3271        impl fmt::Debug for EntriesByPath<'_> {
3272            fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
3273                f.debug_map()
3274                    .entries(self.0.iter().map(|entry| (&entry.path, entry.id)))
3275                    .finish()
3276            }
3277        }
3278
3279        impl fmt::Debug for EntriesById<'_> {
3280            fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
3281                f.debug_list().entries(self.0.iter()).finish()
3282            }
3283        }
3284
3285        f.debug_struct("Snapshot")
3286            .field("id", &self.id)
3287            .field("root_name", &self.root_name)
3288            .field("entries_by_path", &EntriesByPath(&self.entries_by_path))
3289            .field("entries_by_id", &EntriesById(&self.entries_by_id))
3290            .finish()
3291    }
3292}
3293
3294#[derive(Debug, Clone, PartialEq)]
3295pub struct File {
3296    pub worktree: Entity<Worktree>,
3297    pub path: Arc<Path>,
3298    pub disk_state: DiskState,
3299    pub entry_id: Option<ProjectEntryId>,
3300    pub is_local: bool,
3301    pub is_private: bool,
3302}
3303
3304impl language::File for File {
3305    fn as_local(&self) -> Option<&dyn language::LocalFile> {
3306        if self.is_local { Some(self) } else { None }
3307    }
3308
3309    fn disk_state(&self) -> DiskState {
3310        self.disk_state
3311    }
3312
3313    fn path(&self) -> &Arc<Path> {
3314        &self.path
3315    }
3316
3317    fn full_path(&self, cx: &App) -> PathBuf {
3318        self.worktree.read(cx).full_path(&self.path)
3319    }
3320
3321    /// Returns the last component of this handle's absolute path. If this handle refers to the root
3322    /// of its worktree, then this method will return the name of the worktree itself.
3323    fn file_name<'a>(&'a self, cx: &'a App) -> &'a OsStr {
3324        self.path
3325            .file_name()
3326            .unwrap_or_else(|| OsStr::new(&self.worktree.read(cx).root_name))
3327    }
3328
3329    fn worktree_id(&self, cx: &App) -> WorktreeId {
3330        self.worktree.read(cx).id()
3331    }
3332
3333    fn to_proto(&self, cx: &App) -> rpc::proto::File {
3334        rpc::proto::File {
3335            worktree_id: self.worktree.read(cx).id().to_proto(),
3336            entry_id: self.entry_id.map(|id| id.to_proto()),
3337            path: self.path.as_ref().to_proto(),
3338            mtime: self.disk_state.mtime().map(|time| time.into()),
3339            is_deleted: self.disk_state == DiskState::Deleted,
3340        }
3341    }
3342
3343    fn is_private(&self) -> bool {
3344        self.is_private
3345    }
3346}
3347
3348impl language::LocalFile for File {
3349    fn abs_path(&self, cx: &App) -> PathBuf {
3350        let worktree_path = &self.worktree.read(cx).abs_path();
3351        if self.path.as_ref() == Path::new("") {
3352            worktree_path.to_path_buf()
3353        } else {
3354            worktree_path.join(&self.path)
3355        }
3356    }
3357
3358    fn load(&self, cx: &App) -> Task<Result<String>> {
3359        let worktree = self.worktree.read(cx).as_local().unwrap();
3360        let abs_path = worktree.absolutize(&self.path);
3361        let fs = worktree.fs.clone();
3362        cx.background_spawn(async move { fs.load(&abs_path?).await })
3363    }
3364
3365    fn load_bytes(&self, cx: &App) -> Task<Result<Vec<u8>>> {
3366        let worktree = self.worktree.read(cx).as_local().unwrap();
3367        let abs_path = worktree.absolutize(&self.path);
3368        let fs = worktree.fs.clone();
3369        cx.background_spawn(async move { fs.load_bytes(&abs_path?).await })
3370    }
3371}
3372
3373impl File {
3374    pub fn for_entry(entry: Entry, worktree: Entity<Worktree>) -> Arc<Self> {
3375        Arc::new(Self {
3376            worktree,
3377            path: entry.path.clone(),
3378            disk_state: if let Some(mtime) = entry.mtime {
3379                DiskState::Present { mtime }
3380            } else {
3381                DiskState::New
3382            },
3383            entry_id: Some(entry.id),
3384            is_local: true,
3385            is_private: entry.is_private,
3386        })
3387    }
3388
3389    pub fn from_proto(
3390        proto: rpc::proto::File,
3391        worktree: Entity<Worktree>,
3392        cx: &App,
3393    ) -> Result<Self> {
3394        let worktree_id = worktree.read(cx).as_remote().context("not remote")?.id();
3395
3396        anyhow::ensure!(
3397            worktree_id.to_proto() == proto.worktree_id,
3398            "worktree id does not match file"
3399        );
3400
3401        let disk_state = if proto.is_deleted {
3402            DiskState::Deleted
3403        } else {
3404            if let Some(mtime) = proto.mtime.map(&Into::into) {
3405                DiskState::Present { mtime }
3406            } else {
3407                DiskState::New
3408            }
3409        };
3410
3411        Ok(Self {
3412            worktree,
3413            path: Arc::<Path>::from_proto(proto.path),
3414            disk_state,
3415            entry_id: proto.entry_id.map(ProjectEntryId::from_proto),
3416            is_local: false,
3417            is_private: false,
3418        })
3419    }
3420
3421    pub fn from_dyn(file: Option<&Arc<dyn language::File>>) -> Option<&Self> {
3422        file.and_then(|f| {
3423            let f: &dyn language::File = f.borrow();
3424            let f: &dyn Any = f;
3425            f.downcast_ref()
3426        })
3427    }
3428
3429    pub fn worktree_id(&self, cx: &App) -> WorktreeId {
3430        self.worktree.read(cx).id()
3431    }
3432
3433    pub fn project_entry_id(&self, _: &App) -> Option<ProjectEntryId> {
3434        match self.disk_state {
3435            DiskState::Deleted => None,
3436            _ => self.entry_id,
3437        }
3438    }
3439}
3440
3441#[derive(Clone, Debug, PartialEq, Eq)]
3442pub struct Entry {
3443    pub id: ProjectEntryId,
3444    pub kind: EntryKind,
3445    pub path: Arc<Path>,
3446    pub inode: u64,
3447    pub mtime: Option<MTime>,
3448
3449    pub canonical_path: Option<Arc<Path>>,
3450    /// Whether this entry is ignored by Git.
3451    ///
3452    /// We only scan ignored entries once the directory is expanded and
3453    /// exclude them from searches.
3454    pub is_ignored: bool,
3455
3456    /// Whether this entry is always included in searches.
3457    ///
3458    /// This is used for entries that are always included in searches, even
3459    /// if they are ignored by git. Overridden by file_scan_exclusions.
3460    pub is_always_included: bool,
3461
3462    /// Whether this entry's canonical path is outside of the worktree.
3463    /// This means the entry is only accessible from the worktree root via a
3464    /// symlink.
3465    ///
3466    /// We only scan entries outside of the worktree once the symlinked
3467    /// directory is expanded. External entries are treated like gitignored
3468    /// entries in that they are not included in searches.
3469    pub is_external: bool,
3470
3471    /// Whether this entry is considered to be a `.env` file.
3472    pub is_private: bool,
3473    /// The entry's size on disk, in bytes.
3474    pub size: u64,
3475    pub char_bag: CharBag,
3476    pub is_fifo: bool,
3477}
3478
3479#[derive(Clone, Copy, Debug, PartialEq, Eq)]
3480pub enum EntryKind {
3481    UnloadedDir,
3482    PendingDir,
3483    Dir,
3484    File,
3485}
3486
3487#[derive(Clone, Copy, Debug, PartialEq)]
3488pub enum PathChange {
3489    /// A filesystem entry was was created.
3490    Added,
3491    /// A filesystem entry was removed.
3492    Removed,
3493    /// A filesystem entry was updated.
3494    Updated,
3495    /// A filesystem entry was either updated or added. We don't know
3496    /// whether or not it already existed, because the path had not
3497    /// been loaded before the event.
3498    AddedOrUpdated,
3499    /// A filesystem entry was found during the initial scan of the worktree.
3500    Loaded,
3501}
3502
3503#[derive(Clone, Debug, PartialEq, Eq)]
3504pub struct UpdatedGitRepository {
3505    /// ID of the repository's working directory.
3506    ///
3507    /// For a repo that's above the worktree root, this is the ID of the worktree root, and hence not unique.
3508    /// It's included here to aid the GitStore in detecting when a repository's working directory is renamed.
3509    pub work_directory_id: ProjectEntryId,
3510    pub old_work_directory_abs_path: Option<Arc<Path>>,
3511    pub new_work_directory_abs_path: Option<Arc<Path>>,
3512    /// For a normal git repository checkout, the absolute path to the .git directory.
3513    /// For a worktree, the absolute path to the worktree's subdirectory inside the .git directory.
3514    pub dot_git_abs_path: Option<Arc<Path>>,
3515    pub repository_dir_abs_path: Option<Arc<Path>>,
3516    pub common_dir_abs_path: Option<Arc<Path>>,
3517}
3518
3519pub type UpdatedEntriesSet = Arc<[(Arc<Path>, ProjectEntryId, PathChange)]>;
3520pub type UpdatedGitRepositoriesSet = Arc<[UpdatedGitRepository]>;
3521
3522#[derive(Clone, Debug)]
3523pub struct PathProgress<'a> {
3524    pub max_path: &'a Path,
3525}
3526
3527#[derive(Clone, Debug)]
3528pub struct PathSummary<S> {
3529    pub max_path: Arc<Path>,
3530    pub item_summary: S,
3531}
3532
3533impl<S: Summary> Summary for PathSummary<S> {
3534    type Context = S::Context;
3535
3536    fn zero(cx: &Self::Context) -> Self {
3537        Self {
3538            max_path: Path::new("").into(),
3539            item_summary: S::zero(cx),
3540        }
3541    }
3542
3543    fn add_summary(&mut self, rhs: &Self, cx: &Self::Context) {
3544        self.max_path = rhs.max_path.clone();
3545        self.item_summary.add_summary(&rhs.item_summary, cx);
3546    }
3547}
3548
3549impl<'a, S: Summary> sum_tree::Dimension<'a, PathSummary<S>> for PathProgress<'a> {
3550    fn zero(_: &<PathSummary<S> as Summary>::Context) -> Self {
3551        Self {
3552            max_path: Path::new(""),
3553        }
3554    }
3555
3556    fn add_summary(
3557        &mut self,
3558        summary: &'a PathSummary<S>,
3559        _: &<PathSummary<S> as Summary>::Context,
3560    ) {
3561        self.max_path = summary.max_path.as_ref()
3562    }
3563}
3564
3565impl<'a> sum_tree::Dimension<'a, PathSummary<GitSummary>> for GitSummary {
3566    fn zero(_cx: &()) -> Self {
3567        Default::default()
3568    }
3569
3570    fn add_summary(&mut self, summary: &'a PathSummary<GitSummary>, _: &()) {
3571        *self += summary.item_summary
3572    }
3573}
3574
3575impl<'a> sum_tree::SeekTarget<'a, PathSummary<GitSummary>, (TraversalProgress<'a>, GitSummary)>
3576    for PathTarget<'_>
3577{
3578    fn cmp(&self, cursor_location: &(TraversalProgress<'a>, GitSummary), _: &()) -> Ordering {
3579        self.cmp_path(&cursor_location.0.max_path)
3580    }
3581}
3582
3583impl<'a, S: Summary> sum_tree::Dimension<'a, PathSummary<S>> for PathKey {
3584    fn zero(_: &S::Context) -> Self {
3585        Default::default()
3586    }
3587
3588    fn add_summary(&mut self, summary: &'a PathSummary<S>, _: &S::Context) {
3589        self.0 = summary.max_path.clone();
3590    }
3591}
3592
3593impl<'a, S: Summary> sum_tree::Dimension<'a, PathSummary<S>> for TraversalProgress<'a> {
3594    fn zero(_cx: &S::Context) -> Self {
3595        Default::default()
3596    }
3597
3598    fn add_summary(&mut self, summary: &'a PathSummary<S>, _: &S::Context) {
3599        self.max_path = summary.max_path.as_ref();
3600    }
3601}
3602
3603impl Entry {
3604    fn new(
3605        path: Arc<Path>,
3606        metadata: &fs::Metadata,
3607        next_entry_id: &AtomicUsize,
3608        root_char_bag: CharBag,
3609        canonical_path: Option<Arc<Path>>,
3610    ) -> Self {
3611        let char_bag = char_bag_for_path(root_char_bag, &path);
3612        Self {
3613            id: ProjectEntryId::new(next_entry_id),
3614            kind: if metadata.is_dir {
3615                EntryKind::PendingDir
3616            } else {
3617                EntryKind::File
3618            },
3619            path,
3620            inode: metadata.inode,
3621            mtime: Some(metadata.mtime),
3622            size: metadata.len,
3623            canonical_path,
3624            is_ignored: false,
3625            is_always_included: false,
3626            is_external: false,
3627            is_private: false,
3628            char_bag,
3629            is_fifo: metadata.is_fifo,
3630        }
3631    }
3632
3633    pub fn is_created(&self) -> bool {
3634        self.mtime.is_some()
3635    }
3636
3637    pub fn is_dir(&self) -> bool {
3638        self.kind.is_dir()
3639    }
3640
3641    pub fn is_file(&self) -> bool {
3642        self.kind.is_file()
3643    }
3644}
3645
3646impl EntryKind {
3647    pub fn is_dir(&self) -> bool {
3648        matches!(
3649            self,
3650            EntryKind::Dir | EntryKind::PendingDir | EntryKind::UnloadedDir
3651        )
3652    }
3653
3654    pub fn is_unloaded(&self) -> bool {
3655        matches!(self, EntryKind::UnloadedDir)
3656    }
3657
3658    pub fn is_file(&self) -> bool {
3659        matches!(self, EntryKind::File)
3660    }
3661}
3662
3663impl sum_tree::Item for Entry {
3664    type Summary = EntrySummary;
3665
3666    fn summary(&self, _cx: &()) -> Self::Summary {
3667        let non_ignored_count = if (self.is_ignored || self.is_external) && !self.is_always_included
3668        {
3669            0
3670        } else {
3671            1
3672        };
3673        let file_count;
3674        let non_ignored_file_count;
3675        if self.is_file() {
3676            file_count = 1;
3677            non_ignored_file_count = non_ignored_count;
3678        } else {
3679            file_count = 0;
3680            non_ignored_file_count = 0;
3681        }
3682
3683        EntrySummary {
3684            max_path: self.path.clone(),
3685            count: 1,
3686            non_ignored_count,
3687            file_count,
3688            non_ignored_file_count,
3689        }
3690    }
3691}
3692
3693impl sum_tree::KeyedItem for Entry {
3694    type Key = PathKey;
3695
3696    fn key(&self) -> Self::Key {
3697        PathKey(self.path.clone())
3698    }
3699}
3700
3701#[derive(Clone, Debug)]
3702pub struct EntrySummary {
3703    max_path: Arc<Path>,
3704    count: usize,
3705    non_ignored_count: usize,
3706    file_count: usize,
3707    non_ignored_file_count: usize,
3708}
3709
3710impl Default for EntrySummary {
3711    fn default() -> Self {
3712        Self {
3713            max_path: Arc::from(Path::new("")),
3714            count: 0,
3715            non_ignored_count: 0,
3716            file_count: 0,
3717            non_ignored_file_count: 0,
3718        }
3719    }
3720}
3721
3722impl sum_tree::Summary for EntrySummary {
3723    type Context = ();
3724
3725    fn zero(_cx: &()) -> Self {
3726        Default::default()
3727    }
3728
3729    fn add_summary(&mut self, rhs: &Self, _: &()) {
3730        self.max_path = rhs.max_path.clone();
3731        self.count += rhs.count;
3732        self.non_ignored_count += rhs.non_ignored_count;
3733        self.file_count += rhs.file_count;
3734        self.non_ignored_file_count += rhs.non_ignored_file_count;
3735    }
3736}
3737
3738#[derive(Clone, Debug)]
3739struct PathEntry {
3740    id: ProjectEntryId,
3741    path: Arc<Path>,
3742    is_ignored: bool,
3743    scan_id: usize,
3744}
3745
3746impl sum_tree::Item for PathEntry {
3747    type Summary = PathEntrySummary;
3748
3749    fn summary(&self, _cx: &()) -> Self::Summary {
3750        PathEntrySummary { max_id: self.id }
3751    }
3752}
3753
3754impl sum_tree::KeyedItem for PathEntry {
3755    type Key = ProjectEntryId;
3756
3757    fn key(&self) -> Self::Key {
3758        self.id
3759    }
3760}
3761
3762#[derive(Clone, Debug, Default)]
3763struct PathEntrySummary {
3764    max_id: ProjectEntryId,
3765}
3766
3767impl sum_tree::Summary for PathEntrySummary {
3768    type Context = ();
3769
3770    fn zero(_cx: &Self::Context) -> Self {
3771        Default::default()
3772    }
3773
3774    fn add_summary(&mut self, summary: &Self, _: &Self::Context) {
3775        self.max_id = summary.max_id;
3776    }
3777}
3778
3779impl<'a> sum_tree::Dimension<'a, PathEntrySummary> for ProjectEntryId {
3780    fn zero(_cx: &()) -> Self {
3781        Default::default()
3782    }
3783
3784    fn add_summary(&mut self, summary: &'a PathEntrySummary, _: &()) {
3785        *self = summary.max_id;
3786    }
3787}
3788
3789#[derive(Clone, Debug, Eq, PartialEq, Ord, PartialOrd, Hash)]
3790pub struct PathKey(pub Arc<Path>);
3791
3792impl Default for PathKey {
3793    fn default() -> Self {
3794        Self(Path::new("").into())
3795    }
3796}
3797
3798impl<'a> sum_tree::Dimension<'a, EntrySummary> for PathKey {
3799    fn zero(_cx: &()) -> Self {
3800        Default::default()
3801    }
3802
3803    fn add_summary(&mut self, summary: &'a EntrySummary, _: &()) {
3804        self.0 = summary.max_path.clone();
3805    }
3806}
3807
3808struct BackgroundScanner {
3809    state: Mutex<BackgroundScannerState>,
3810    fs: Arc<dyn Fs>,
3811    fs_case_sensitive: bool,
3812    status_updates_tx: UnboundedSender<ScanState>,
3813    executor: BackgroundExecutor,
3814    scan_requests_rx: channel::Receiver<ScanRequest>,
3815    path_prefixes_to_scan_rx: channel::Receiver<PathPrefixScanRequest>,
3816    next_entry_id: Arc<AtomicUsize>,
3817    phase: BackgroundScannerPhase,
3818    watcher: Arc<dyn Watcher>,
3819    settings: WorktreeSettings,
3820    share_private_files: bool,
3821}
3822
3823#[derive(Copy, Clone, PartialEq)]
3824enum BackgroundScannerPhase {
3825    InitialScan,
3826    EventsReceivedDuringInitialScan,
3827    Events,
3828}
3829
3830impl BackgroundScanner {
3831    async fn run(&mut self, mut fs_events_rx: Pin<Box<dyn Send + Stream<Item = Vec<PathEvent>>>>) {
3832        // If the worktree root does not contain a git repository, then find
3833        // the git repository in an ancestor directory. Find any gitignore files
3834        // in ancestor directories.
3835        let root_abs_path = self.state.lock().snapshot.abs_path.clone();
3836        let (ignores, repo) = discover_ancestor_git_repo(self.fs.clone(), &root_abs_path).await;
3837        self.state
3838            .lock()
3839            .snapshot
3840            .ignores_by_parent_abs_path
3841            .extend(ignores);
3842        let containing_git_repository = repo.and_then(|(ancestor_dot_git, work_directory)| {
3843            self.state.lock().insert_git_repository_for_path(
3844                work_directory,
3845                ancestor_dot_git.as_path().into(),
3846                self.fs.as_ref(),
3847                self.watcher.as_ref(),
3848            )?;
3849            Some(ancestor_dot_git)
3850        });
3851
3852        log::trace!("containing git repository: {containing_git_repository:?}");
3853
3854        let (scan_job_tx, scan_job_rx) = channel::unbounded();
3855        {
3856            let mut state = self.state.lock();
3857            state.snapshot.scan_id += 1;
3858            if let Some(mut root_entry) = state.snapshot.root_entry().cloned() {
3859                let ignore_stack = state
3860                    .snapshot
3861                    .ignore_stack_for_abs_path(root_abs_path.as_path(), true);
3862                if ignore_stack.is_abs_path_ignored(root_abs_path.as_path(), true) {
3863                    root_entry.is_ignored = true;
3864                    state.insert_entry(root_entry.clone(), self.fs.as_ref(), self.watcher.as_ref());
3865                }
3866                state.enqueue_scan_dir(root_abs_path.into(), &root_entry, &scan_job_tx);
3867            }
3868        };
3869
3870        // Perform an initial scan of the directory.
3871        drop(scan_job_tx);
3872        self.scan_dirs(true, scan_job_rx).await;
3873        {
3874            let mut state = self.state.lock();
3875            state.snapshot.completed_scan_id = state.snapshot.scan_id;
3876        }
3877
3878        self.send_status_update(false, SmallVec::new());
3879
3880        // Process any any FS events that occurred while performing the initial scan.
3881        // For these events, update events cannot be as precise, because we didn't
3882        // have the previous state loaded yet.
3883        self.phase = BackgroundScannerPhase::EventsReceivedDuringInitialScan;
3884        if let Poll::Ready(Some(mut paths)) = futures::poll!(fs_events_rx.next()) {
3885            while let Poll::Ready(Some(more_paths)) = futures::poll!(fs_events_rx.next()) {
3886                paths.extend(more_paths);
3887            }
3888            self.process_events(paths.into_iter().map(Into::into).collect())
3889                .await;
3890        }
3891        if let Some(abs_path) = containing_git_repository {
3892            self.process_events(vec![abs_path]).await;
3893        }
3894
3895        // Continue processing events until the worktree is dropped.
3896        self.phase = BackgroundScannerPhase::Events;
3897
3898        loop {
3899            select_biased! {
3900                // Process any path refresh requests from the worktree. Prioritize
3901                // these before handling changes reported by the filesystem.
3902                request = self.next_scan_request().fuse() => {
3903                    let Ok(request) = request else { break };
3904                    if !self.process_scan_request(request, false).await {
3905                        return;
3906                    }
3907                }
3908
3909                path_prefix_request = self.path_prefixes_to_scan_rx.recv().fuse() => {
3910                    let Ok(request) = path_prefix_request else { break };
3911                    log::trace!("adding path prefix {:?}", request.path);
3912
3913                    let did_scan = self.forcibly_load_paths(std::slice::from_ref(&request.path)).await;
3914                    if did_scan {
3915                        let abs_path =
3916                        {
3917                            let mut state = self.state.lock();
3918                            state.path_prefixes_to_scan.insert(request.path.clone());
3919                            state.snapshot.abs_path.as_path().join(&request.path)
3920                        };
3921
3922                        if let Some(abs_path) = self.fs.canonicalize(&abs_path).await.log_err() {
3923                            self.process_events(vec![abs_path]).await;
3924                        }
3925                    }
3926                    self.send_status_update(false, request.done);
3927                }
3928
3929                paths = fs_events_rx.next().fuse() => {
3930                    let Some(mut paths) = paths else { break };
3931                    while let Poll::Ready(Some(more_paths)) = futures::poll!(fs_events_rx.next()) {
3932                        paths.extend(more_paths);
3933                    }
3934                    self.process_events(paths.into_iter().map(Into::into).collect()).await;
3935                }
3936            }
3937        }
3938    }
3939
3940    async fn process_scan_request(&self, mut request: ScanRequest, scanning: bool) -> bool {
3941        log::debug!("rescanning paths {:?}", request.relative_paths);
3942
3943        request.relative_paths.sort_unstable();
3944        self.forcibly_load_paths(&request.relative_paths).await;
3945
3946        let root_path = self.state.lock().snapshot.abs_path.clone();
3947        let root_canonical_path = match self.fs.canonicalize(root_path.as_path()).await {
3948            Ok(path) => SanitizedPath::from(path),
3949            Err(err) => {
3950                log::error!("failed to canonicalize root path {root_path:?}: {err}");
3951                return true;
3952            }
3953        };
3954        let abs_paths = request
3955            .relative_paths
3956            .iter()
3957            .map(|path| {
3958                if path.file_name().is_some() {
3959                    root_canonical_path.as_path().join(path).to_path_buf()
3960                } else {
3961                    root_canonical_path.as_path().to_path_buf()
3962                }
3963            })
3964            .collect::<Vec<_>>();
3965
3966        {
3967            let mut state = self.state.lock();
3968            let is_idle = state.snapshot.completed_scan_id == state.snapshot.scan_id;
3969            state.snapshot.scan_id += 1;
3970            if is_idle {
3971                state.snapshot.completed_scan_id = state.snapshot.scan_id;
3972            }
3973        }
3974
3975        self.reload_entries_for_paths(
3976            root_path,
3977            root_canonical_path,
3978            &request.relative_paths,
3979            abs_paths,
3980            None,
3981        )
3982        .await;
3983
3984        self.send_status_update(scanning, request.done)
3985    }
3986
3987    async fn process_events(&self, mut abs_paths: Vec<PathBuf>) {
3988        let root_path = self.state.lock().snapshot.abs_path.clone();
3989        let root_canonical_path = match self.fs.canonicalize(root_path.as_path()).await {
3990            Ok(path) => SanitizedPath::from(path),
3991            Err(err) => {
3992                let new_path = self
3993                    .state
3994                    .lock()
3995                    .snapshot
3996                    .root_file_handle
3997                    .clone()
3998                    .and_then(|handle| handle.current_path(&self.fs).log_err())
3999                    .map(SanitizedPath::from)
4000                    .filter(|new_path| *new_path != root_path);
4001
4002                if let Some(new_path) = new_path.as_ref() {
4003                    log::info!(
4004                        "root renamed from {} to {}",
4005                        root_path.as_path().display(),
4006                        new_path.as_path().display()
4007                    )
4008                } else {
4009                    log::warn!("root path could not be canonicalized: {}", err);
4010                }
4011                self.status_updates_tx
4012                    .unbounded_send(ScanState::RootUpdated { new_path })
4013                    .ok();
4014                return;
4015            }
4016        };
4017
4018        // Certain directories may have FS changes, but do not lead to git data changes that Zed cares about.
4019        // Ignore these, to avoid Zed unnecessarily rescanning git metadata.
4020        let skipped_files_in_dot_git = HashSet::from_iter([*COMMIT_MESSAGE, *INDEX_LOCK]);
4021        let skipped_dirs_in_dot_git = [*FSMONITOR_DAEMON, *LFS_DIR];
4022
4023        let mut relative_paths = Vec::with_capacity(abs_paths.len());
4024        let mut dot_git_abs_paths = Vec::new();
4025        abs_paths.sort_unstable();
4026        abs_paths.dedup_by(|a, b| a.starts_with(b));
4027        abs_paths.retain(|abs_path| {
4028            let abs_path = SanitizedPath::from(abs_path);
4029
4030            let snapshot = &self.state.lock().snapshot;
4031            {
4032                let mut is_git_related = false;
4033
4034                let dot_git_paths = abs_path.as_path().ancestors().find_map(|ancestor| {
4035                    if smol::block_on(is_git_dir(ancestor, self.fs.as_ref())) {
4036                        let path_in_git_dir = abs_path.as_path().strip_prefix(ancestor).expect("stripping off the ancestor");
4037                        Some((ancestor.to_owned(), path_in_git_dir.to_owned()))
4038                    } else {
4039                        None
4040                    }
4041                });
4042
4043                if let Some((dot_git_abs_path, path_in_git_dir)) = dot_git_paths {
4044                    if skipped_files_in_dot_git.contains(path_in_git_dir.as_os_str()) || skipped_dirs_in_dot_git.iter().any(|skipped_git_subdir| path_in_git_dir.starts_with(skipped_git_subdir)) {
4045                        log::debug!("ignoring event {abs_path:?} as it's in the .git directory among skipped files or directories");
4046                        return false;
4047                    }
4048
4049                    is_git_related = true;
4050                    if !dot_git_abs_paths.contains(&dot_git_abs_path) {
4051                        dot_git_abs_paths.push(dot_git_abs_path);
4052                    }
4053                }
4054
4055                let relative_path: Arc<Path> =
4056                    if let Ok(path) = abs_path.strip_prefix(&root_canonical_path) {
4057                        path.into()
4058                    } else {
4059                        if is_git_related {
4060                            log::debug!(
4061                              "ignoring event {abs_path:?}, since it's in git dir outside of root path {root_canonical_path:?}",
4062                            );
4063                        } else {
4064                            log::error!(
4065                              "ignoring event {abs_path:?} outside of root path {root_canonical_path:?}",
4066                            );
4067                        }
4068                        return false;
4069                    };
4070
4071                if abs_path.0.file_name() == Some(*GITIGNORE) {
4072                    for (_, repo) in snapshot.git_repositories.iter().filter(|(_, repo)| repo.directory_contains(&relative_path)) {
4073                        if !dot_git_abs_paths.iter().any(|dot_git_abs_path| dot_git_abs_path == repo.common_dir_abs_path.as_ref()) {
4074                            dot_git_abs_paths.push(repo.common_dir_abs_path.to_path_buf());
4075                        }
4076                    }
4077                }
4078
4079                let parent_dir_is_loaded = relative_path.parent().map_or(true, |parent| {
4080                    snapshot
4081                        .entry_for_path(parent)
4082                        .map_or(false, |entry| entry.kind == EntryKind::Dir)
4083                });
4084                if !parent_dir_is_loaded {
4085                    log::debug!("ignoring event {relative_path:?} within unloaded directory");
4086                    return false;
4087                }
4088
4089                if self.settings.is_path_excluded(&relative_path) {
4090                    if !is_git_related {
4091                        log::debug!("ignoring FS event for excluded path {relative_path:?}");
4092                    }
4093                    return false;
4094                }
4095
4096                relative_paths.push(relative_path);
4097                true
4098            }
4099        });
4100
4101        if relative_paths.is_empty() && dot_git_abs_paths.is_empty() {
4102            return;
4103        }
4104
4105        self.state.lock().snapshot.scan_id += 1;
4106
4107        let (scan_job_tx, scan_job_rx) = channel::unbounded();
4108        log::debug!("received fs events {:?}", relative_paths);
4109        self.reload_entries_for_paths(
4110            root_path,
4111            root_canonical_path,
4112            &relative_paths,
4113            abs_paths,
4114            Some(scan_job_tx.clone()),
4115        )
4116        .await;
4117
4118        self.update_ignore_statuses(scan_job_tx).await;
4119        self.scan_dirs(false, scan_job_rx).await;
4120
4121        if !dot_git_abs_paths.is_empty() {
4122            self.update_git_repositories(dot_git_abs_paths);
4123        }
4124
4125        {
4126            let mut state = self.state.lock();
4127            state.snapshot.completed_scan_id = state.snapshot.scan_id;
4128            for (_, entry) in mem::take(&mut state.removed_entries) {
4129                state.scanned_dirs.remove(&entry.id);
4130            }
4131        }
4132        self.send_status_update(false, SmallVec::new());
4133    }
4134
4135    async fn forcibly_load_paths(&self, paths: &[Arc<Path>]) -> bool {
4136        let (scan_job_tx, scan_job_rx) = channel::unbounded();
4137        {
4138            let mut state = self.state.lock();
4139            let root_path = state.snapshot.abs_path.clone();
4140            for path in paths {
4141                for ancestor in path.ancestors() {
4142                    if let Some(entry) = state.snapshot.entry_for_path(ancestor) {
4143                        if entry.kind == EntryKind::UnloadedDir {
4144                            let abs_path = root_path.as_path().join(ancestor);
4145                            state.enqueue_scan_dir(abs_path.into(), entry, &scan_job_tx);
4146                            state.paths_to_scan.insert(path.clone());
4147                            break;
4148                        }
4149                    }
4150                }
4151            }
4152            drop(scan_job_tx);
4153        }
4154        while let Ok(job) = scan_job_rx.recv().await {
4155            self.scan_dir(&job).await.log_err();
4156        }
4157
4158        !mem::take(&mut self.state.lock().paths_to_scan).is_empty()
4159    }
4160
4161    async fn scan_dirs(
4162        &self,
4163        enable_progress_updates: bool,
4164        scan_jobs_rx: channel::Receiver<ScanJob>,
4165    ) {
4166        if self
4167            .status_updates_tx
4168            .unbounded_send(ScanState::Started)
4169            .is_err()
4170        {
4171            return;
4172        }
4173
4174        let progress_update_count = AtomicUsize::new(0);
4175        self.executor
4176            .scoped(|scope| {
4177                for _ in 0..self.executor.num_cpus() {
4178                    scope.spawn(async {
4179                        let mut last_progress_update_count = 0;
4180                        let progress_update_timer = self.progress_timer(enable_progress_updates).fuse();
4181                        futures::pin_mut!(progress_update_timer);
4182
4183                        loop {
4184                            select_biased! {
4185                                // Process any path refresh requests before moving on to process
4186                                // the scan queue, so that user operations are prioritized.
4187                                request = self.next_scan_request().fuse() => {
4188                                    let Ok(request) = request else { break };
4189                                    if !self.process_scan_request(request, true).await {
4190                                        return;
4191                                    }
4192                                }
4193
4194                                // Send periodic progress updates to the worktree. Use an atomic counter
4195                                // to ensure that only one of the workers sends a progress update after
4196                                // the update interval elapses.
4197                                _ = progress_update_timer => {
4198                                    match progress_update_count.compare_exchange(
4199                                        last_progress_update_count,
4200                                        last_progress_update_count + 1,
4201                                        SeqCst,
4202                                        SeqCst
4203                                    ) {
4204                                        Ok(_) => {
4205                                            last_progress_update_count += 1;
4206                                            self.send_status_update(true, SmallVec::new());
4207                                        }
4208                                        Err(count) => {
4209                                            last_progress_update_count = count;
4210                                        }
4211                                    }
4212                                    progress_update_timer.set(self.progress_timer(enable_progress_updates).fuse());
4213                                }
4214
4215                                // Recursively load directories from the file system.
4216                                job = scan_jobs_rx.recv().fuse() => {
4217                                    let Ok(job) = job else { break };
4218                                    if let Err(err) = self.scan_dir(&job).await {
4219                                        if job.path.as_ref() != Path::new("") {
4220                                            log::error!("error scanning directory {:?}: {}", job.abs_path, err);
4221                                        }
4222                                    }
4223                                }
4224                            }
4225                        }
4226                    });
4227                }
4228            })
4229            .await;
4230    }
4231
4232    fn send_status_update(&self, scanning: bool, barrier: SmallVec<[barrier::Sender; 1]>) -> bool {
4233        let mut state = self.state.lock();
4234        if state.changed_paths.is_empty() && scanning {
4235            return true;
4236        }
4237
4238        let new_snapshot = state.snapshot.clone();
4239        let old_snapshot = mem::replace(&mut state.prev_snapshot, new_snapshot.snapshot.clone());
4240        let changes = build_diff(
4241            self.phase,
4242            &old_snapshot,
4243            &new_snapshot,
4244            &state.changed_paths,
4245        );
4246        state.changed_paths.clear();
4247
4248        self.status_updates_tx
4249            .unbounded_send(ScanState::Updated {
4250                snapshot: new_snapshot,
4251                changes,
4252                scanning,
4253                barrier,
4254            })
4255            .is_ok()
4256    }
4257
4258    async fn scan_dir(&self, job: &ScanJob) -> Result<()> {
4259        let root_abs_path;
4260        let root_char_bag;
4261        {
4262            let snapshot = &self.state.lock().snapshot;
4263            if self.settings.is_path_excluded(&job.path) {
4264                log::error!("skipping excluded directory {:?}", job.path);
4265                return Ok(());
4266            }
4267            log::trace!("scanning directory {:?}", job.path);
4268            root_abs_path = snapshot.abs_path().clone();
4269            root_char_bag = snapshot.root_char_bag;
4270        }
4271
4272        let next_entry_id = self.next_entry_id.clone();
4273        let mut ignore_stack = job.ignore_stack.clone();
4274        let mut new_ignore = None;
4275        let mut root_canonical_path = None;
4276        let mut new_entries: Vec<Entry> = Vec::new();
4277        let mut new_jobs: Vec<Option<ScanJob>> = Vec::new();
4278        let mut child_paths = self
4279            .fs
4280            .read_dir(&job.abs_path)
4281            .await?
4282            .filter_map(|entry| async {
4283                match entry {
4284                    Ok(entry) => Some(entry),
4285                    Err(error) => {
4286                        log::error!("error processing entry {:?}", error);
4287                        None
4288                    }
4289                }
4290            })
4291            .collect::<Vec<_>>()
4292            .await;
4293
4294        // Ensure that .git and .gitignore are processed first.
4295        swap_to_front(&mut child_paths, *GITIGNORE);
4296        swap_to_front(&mut child_paths, *DOT_GIT);
4297
4298        for child_abs_path in child_paths {
4299            let child_abs_path: Arc<Path> = child_abs_path.into();
4300            let child_name = child_abs_path.file_name().unwrap();
4301            let child_path: Arc<Path> = job.path.join(child_name).into();
4302
4303            if child_name == *DOT_GIT {
4304                let mut state = self.state.lock();
4305                state.insert_git_repository(
4306                    child_path.clone(),
4307                    self.fs.as_ref(),
4308                    self.watcher.as_ref(),
4309                );
4310            } else if child_name == *GITIGNORE {
4311                match build_gitignore(&child_abs_path, self.fs.as_ref()).await {
4312                    Ok(ignore) => {
4313                        let ignore = Arc::new(ignore);
4314                        ignore_stack = ignore_stack.append(job.abs_path.clone(), ignore.clone());
4315                        new_ignore = Some(ignore);
4316                    }
4317                    Err(error) => {
4318                        log::error!(
4319                            "error loading .gitignore file {:?} - {:?}",
4320                            child_name,
4321                            error
4322                        );
4323                    }
4324                }
4325            }
4326
4327            if self.settings.is_path_excluded(&child_path) {
4328                log::debug!("skipping excluded child entry {child_path:?}");
4329                self.state.lock().remove_path(&child_path);
4330                continue;
4331            }
4332
4333            let child_metadata = match self.fs.metadata(&child_abs_path).await {
4334                Ok(Some(metadata)) => metadata,
4335                Ok(None) => continue,
4336                Err(err) => {
4337                    log::error!("error processing {child_abs_path:?}: {err:?}");
4338                    continue;
4339                }
4340            };
4341
4342            let mut child_entry = Entry::new(
4343                child_path.clone(),
4344                &child_metadata,
4345                &next_entry_id,
4346                root_char_bag,
4347                None,
4348            );
4349
4350            if job.is_external {
4351                child_entry.is_external = true;
4352            } else if child_metadata.is_symlink {
4353                let canonical_path = match self.fs.canonicalize(&child_abs_path).await {
4354                    Ok(path) => path,
4355                    Err(err) => {
4356                        log::error!("error reading target of symlink {child_abs_path:?}: {err:#}",);
4357                        continue;
4358                    }
4359                };
4360
4361                // lazily canonicalize the root path in order to determine if
4362                // symlinks point outside of the worktree.
4363                let root_canonical_path = match &root_canonical_path {
4364                    Some(path) => path,
4365                    None => match self.fs.canonicalize(&root_abs_path).await {
4366                        Ok(path) => root_canonical_path.insert(path),
4367                        Err(err) => {
4368                            log::error!("error canonicalizing root {:?}: {:?}", root_abs_path, err);
4369                            continue;
4370                        }
4371                    },
4372                };
4373
4374                if !canonical_path.starts_with(root_canonical_path) {
4375                    child_entry.is_external = true;
4376                }
4377
4378                child_entry.canonical_path = Some(canonical_path.into());
4379            }
4380
4381            if child_entry.is_dir() {
4382                child_entry.is_ignored = ignore_stack.is_abs_path_ignored(&child_abs_path, true);
4383                child_entry.is_always_included = self.settings.is_path_always_included(&child_path);
4384
4385                // Avoid recursing until crash in the case of a recursive symlink
4386                if job.ancestor_inodes.contains(&child_entry.inode) {
4387                    new_jobs.push(None);
4388                } else {
4389                    let mut ancestor_inodes = job.ancestor_inodes.clone();
4390                    ancestor_inodes.insert(child_entry.inode);
4391
4392                    new_jobs.push(Some(ScanJob {
4393                        abs_path: child_abs_path.clone(),
4394                        path: child_path,
4395                        is_external: child_entry.is_external,
4396                        ignore_stack: if child_entry.is_ignored {
4397                            IgnoreStack::all()
4398                        } else {
4399                            ignore_stack.clone()
4400                        },
4401                        ancestor_inodes,
4402                        scan_queue: job.scan_queue.clone(),
4403                    }));
4404                }
4405            } else {
4406                child_entry.is_ignored = ignore_stack.is_abs_path_ignored(&child_abs_path, false);
4407                child_entry.is_always_included = self.settings.is_path_always_included(&child_path);
4408            }
4409
4410            {
4411                let relative_path = job.path.join(child_name);
4412                if self.is_path_private(&relative_path) {
4413                    log::debug!("detected private file: {relative_path:?}");
4414                    child_entry.is_private = true;
4415                }
4416            }
4417
4418            new_entries.push(child_entry);
4419        }
4420
4421        let mut state = self.state.lock();
4422
4423        // Identify any subdirectories that should not be scanned.
4424        let mut job_ix = 0;
4425        for entry in &mut new_entries {
4426            state.reuse_entry_id(entry);
4427            if entry.is_dir() {
4428                if state.should_scan_directory(entry) {
4429                    job_ix += 1;
4430                } else {
4431                    log::debug!("defer scanning directory {:?}", entry.path);
4432                    entry.kind = EntryKind::UnloadedDir;
4433                    new_jobs.remove(job_ix);
4434                }
4435            }
4436            if entry.is_always_included {
4437                state
4438                    .snapshot
4439                    .always_included_entries
4440                    .push(entry.path.clone());
4441            }
4442        }
4443
4444        state.populate_dir(&job.path, new_entries, new_ignore);
4445        self.watcher.add(job.abs_path.as_ref()).log_err();
4446
4447        for new_job in new_jobs.into_iter().flatten() {
4448            job.scan_queue
4449                .try_send(new_job)
4450                .expect("channel is unbounded");
4451        }
4452
4453        Ok(())
4454    }
4455
4456    /// All list arguments should be sorted before calling this function
4457    async fn reload_entries_for_paths(
4458        &self,
4459        root_abs_path: SanitizedPath,
4460        root_canonical_path: SanitizedPath,
4461        relative_paths: &[Arc<Path>],
4462        abs_paths: Vec<PathBuf>,
4463        scan_queue_tx: Option<Sender<ScanJob>>,
4464    ) {
4465        // grab metadata for all requested paths
4466        let metadata = futures::future::join_all(
4467            abs_paths
4468                .iter()
4469                .map(|abs_path| async move {
4470                    let metadata = self.fs.metadata(abs_path).await?;
4471                    if let Some(metadata) = metadata {
4472                        let canonical_path = self.fs.canonicalize(abs_path).await?;
4473
4474                        // If we're on a case-insensitive filesystem (default on macOS), we want
4475                        // to only ignore metadata for non-symlink files if their absolute-path matches
4476                        // the canonical-path.
4477                        // Because if not, this might be a case-only-renaming (`mv test.txt TEST.TXT`)
4478                        // and we want to ignore the metadata for the old path (`test.txt`) so it's
4479                        // treated as removed.
4480                        if !self.fs_case_sensitive && !metadata.is_symlink {
4481                            let canonical_file_name = canonical_path.file_name();
4482                            let file_name = abs_path.file_name();
4483                            if canonical_file_name != file_name {
4484                                return Ok(None);
4485                            }
4486                        }
4487
4488                        anyhow::Ok(Some((metadata, SanitizedPath::from(canonical_path))))
4489                    } else {
4490                        Ok(None)
4491                    }
4492                })
4493                .collect::<Vec<_>>(),
4494        )
4495        .await;
4496
4497        let mut new_ancestor_repo = if relative_paths
4498            .iter()
4499            .any(|path| path.as_ref() == Path::new(""))
4500        {
4501            Some(discover_ancestor_git_repo(self.fs.clone(), &root_abs_path).await)
4502        } else {
4503            None
4504        };
4505
4506        let mut state = self.state.lock();
4507        let doing_recursive_update = scan_queue_tx.is_some();
4508
4509        // Remove any entries for paths that no longer exist or are being recursively
4510        // refreshed. Do this before adding any new entries, so that renames can be
4511        // detected regardless of the order of the paths.
4512        for (path, metadata) in relative_paths.iter().zip(metadata.iter()) {
4513            if matches!(metadata, Ok(None)) || doing_recursive_update {
4514                log::trace!("remove path {:?}", path);
4515                state.remove_path(path);
4516            }
4517        }
4518
4519        for (path, metadata) in relative_paths.iter().zip(metadata.into_iter()) {
4520            let abs_path: Arc<Path> = root_abs_path.as_path().join(path).into();
4521            match metadata {
4522                Ok(Some((metadata, canonical_path))) => {
4523                    let ignore_stack = state
4524                        .snapshot
4525                        .ignore_stack_for_abs_path(&abs_path, metadata.is_dir);
4526                    let is_external = !canonical_path.starts_with(&root_canonical_path);
4527                    let mut fs_entry = Entry::new(
4528                        path.clone(),
4529                        &metadata,
4530                        self.next_entry_id.as_ref(),
4531                        state.snapshot.root_char_bag,
4532                        if metadata.is_symlink {
4533                            Some(canonical_path.as_path().to_path_buf().into())
4534                        } else {
4535                            None
4536                        },
4537                    );
4538
4539                    let is_dir = fs_entry.is_dir();
4540                    fs_entry.is_ignored = ignore_stack.is_abs_path_ignored(&abs_path, is_dir);
4541                    fs_entry.is_external = is_external;
4542                    fs_entry.is_private = self.is_path_private(path);
4543                    fs_entry.is_always_included = self.settings.is_path_always_included(path);
4544
4545                    if let (Some(scan_queue_tx), true) = (&scan_queue_tx, is_dir) {
4546                        if state.should_scan_directory(&fs_entry)
4547                            || (fs_entry.path.as_os_str().is_empty()
4548                                && abs_path.file_name() == Some(*DOT_GIT))
4549                        {
4550                            state.enqueue_scan_dir(abs_path, &fs_entry, scan_queue_tx);
4551                        } else {
4552                            fs_entry.kind = EntryKind::UnloadedDir;
4553                        }
4554                    }
4555
4556                    state.insert_entry(fs_entry.clone(), self.fs.as_ref(), self.watcher.as_ref());
4557
4558                    if path.as_ref() == Path::new("") {
4559                        if let Some((ignores, repo)) = new_ancestor_repo.take() {
4560                            log::trace!("updating ancestor git repository");
4561                            state.snapshot.ignores_by_parent_abs_path.extend(ignores);
4562                            if let Some((ancestor_dot_git, work_directory)) = repo {
4563                                state.insert_git_repository_for_path(
4564                                    work_directory,
4565                                    ancestor_dot_git.as_path().into(),
4566                                    self.fs.as_ref(),
4567                                    self.watcher.as_ref(),
4568                                );
4569                            }
4570                        }
4571                    }
4572                }
4573                Ok(None) => {
4574                    self.remove_repo_path(path, &mut state.snapshot);
4575                }
4576                Err(err) => {
4577                    log::error!("error reading file {abs_path:?} on event: {err:#}");
4578                }
4579            }
4580        }
4581
4582        util::extend_sorted(
4583            &mut state.changed_paths,
4584            relative_paths.iter().cloned(),
4585            usize::MAX,
4586            Ord::cmp,
4587        );
4588    }
4589
4590    fn remove_repo_path(&self, path: &Arc<Path>, snapshot: &mut LocalSnapshot) -> Option<()> {
4591        if !path
4592            .components()
4593            .any(|component| component.as_os_str() == *DOT_GIT)
4594        {
4595            if let Some(local_repo) = snapshot.local_repo_for_work_directory_path(path) {
4596                let id = local_repo.work_directory_id;
4597                log::debug!("remove repo path: {:?}", path);
4598                snapshot.git_repositories.remove(&id);
4599                return Some(());
4600            }
4601        }
4602
4603        Some(())
4604    }
4605
4606    async fn update_ignore_statuses(&self, scan_job_tx: Sender<ScanJob>) {
4607        let mut ignores_to_update = Vec::new();
4608        let (ignore_queue_tx, ignore_queue_rx) = channel::unbounded();
4609        let prev_snapshot;
4610        {
4611            let snapshot = &mut self.state.lock().snapshot;
4612            let abs_path = snapshot.abs_path.clone();
4613            snapshot
4614                .ignores_by_parent_abs_path
4615                .retain(|parent_abs_path, (_, needs_update)| {
4616                    if let Ok(parent_path) = parent_abs_path.strip_prefix(abs_path.as_path()) {
4617                        if *needs_update {
4618                            *needs_update = false;
4619                            if snapshot.snapshot.entry_for_path(parent_path).is_some() {
4620                                ignores_to_update.push(parent_abs_path.clone());
4621                            }
4622                        }
4623
4624                        let ignore_path = parent_path.join(*GITIGNORE);
4625                        if snapshot.snapshot.entry_for_path(ignore_path).is_none() {
4626                            return false;
4627                        }
4628                    }
4629                    true
4630                });
4631
4632            ignores_to_update.sort_unstable();
4633            let mut ignores_to_update = ignores_to_update.into_iter().peekable();
4634            while let Some(parent_abs_path) = ignores_to_update.next() {
4635                while ignores_to_update
4636                    .peek()
4637                    .map_or(false, |p| p.starts_with(&parent_abs_path))
4638                {
4639                    ignores_to_update.next().unwrap();
4640                }
4641
4642                let ignore_stack = snapshot.ignore_stack_for_abs_path(&parent_abs_path, true);
4643                ignore_queue_tx
4644                    .send_blocking(UpdateIgnoreStatusJob {
4645                        abs_path: parent_abs_path,
4646                        ignore_stack,
4647                        ignore_queue: ignore_queue_tx.clone(),
4648                        scan_queue: scan_job_tx.clone(),
4649                    })
4650                    .unwrap();
4651            }
4652
4653            prev_snapshot = snapshot.clone();
4654        }
4655        drop(ignore_queue_tx);
4656
4657        self.executor
4658            .scoped(|scope| {
4659                for _ in 0..self.executor.num_cpus() {
4660                    scope.spawn(async {
4661                        loop {
4662                            select_biased! {
4663                                // Process any path refresh requests before moving on to process
4664                                // the queue of ignore statuses.
4665                                request = self.next_scan_request().fuse() => {
4666                                    let Ok(request) = request else { break };
4667                                    if !self.process_scan_request(request, true).await {
4668                                        return;
4669                                    }
4670                                }
4671
4672                                // Recursively process directories whose ignores have changed.
4673                                job = ignore_queue_rx.recv().fuse() => {
4674                                    let Ok(job) = job else { break };
4675                                    self.update_ignore_status(job, &prev_snapshot).await;
4676                                }
4677                            }
4678                        }
4679                    });
4680                }
4681            })
4682            .await;
4683    }
4684
4685    async fn update_ignore_status(&self, job: UpdateIgnoreStatusJob, snapshot: &LocalSnapshot) {
4686        log::trace!("update ignore status {:?}", job.abs_path);
4687
4688        let mut ignore_stack = job.ignore_stack;
4689        if let Some((ignore, _)) = snapshot.ignores_by_parent_abs_path.get(&job.abs_path) {
4690            ignore_stack = ignore_stack.append(job.abs_path.clone(), ignore.clone());
4691        }
4692
4693        let mut entries_by_id_edits = Vec::new();
4694        let mut entries_by_path_edits = Vec::new();
4695        let path = job
4696            .abs_path
4697            .strip_prefix(snapshot.abs_path.as_path())
4698            .unwrap();
4699
4700        for mut entry in snapshot.child_entries(path).cloned() {
4701            let was_ignored = entry.is_ignored;
4702            let abs_path: Arc<Path> = snapshot.abs_path().join(&entry.path).into();
4703            entry.is_ignored = ignore_stack.is_abs_path_ignored(&abs_path, entry.is_dir());
4704
4705            if entry.is_dir() {
4706                let child_ignore_stack = if entry.is_ignored {
4707                    IgnoreStack::all()
4708                } else {
4709                    ignore_stack.clone()
4710                };
4711
4712                // Scan any directories that were previously ignored and weren't previously scanned.
4713                if was_ignored && !entry.is_ignored && entry.kind.is_unloaded() {
4714                    let state = self.state.lock();
4715                    if state.should_scan_directory(&entry) {
4716                        state.enqueue_scan_dir(abs_path.clone(), &entry, &job.scan_queue);
4717                    }
4718                }
4719
4720                job.ignore_queue
4721                    .send(UpdateIgnoreStatusJob {
4722                        abs_path: abs_path.clone(),
4723                        ignore_stack: child_ignore_stack,
4724                        ignore_queue: job.ignore_queue.clone(),
4725                        scan_queue: job.scan_queue.clone(),
4726                    })
4727                    .await
4728                    .unwrap();
4729            }
4730
4731            if entry.is_ignored != was_ignored {
4732                let mut path_entry = snapshot.entries_by_id.get(&entry.id, &()).unwrap().clone();
4733                path_entry.scan_id = snapshot.scan_id;
4734                path_entry.is_ignored = entry.is_ignored;
4735                entries_by_id_edits.push(Edit::Insert(path_entry));
4736                entries_by_path_edits.push(Edit::Insert(entry));
4737            }
4738        }
4739
4740        let state = &mut self.state.lock();
4741        for edit in &entries_by_path_edits {
4742            if let Edit::Insert(entry) = edit {
4743                if let Err(ix) = state.changed_paths.binary_search(&entry.path) {
4744                    state.changed_paths.insert(ix, entry.path.clone());
4745                }
4746            }
4747        }
4748
4749        state
4750            .snapshot
4751            .entries_by_path
4752            .edit(entries_by_path_edits, &());
4753        state.snapshot.entries_by_id.edit(entries_by_id_edits, &());
4754    }
4755
4756    fn update_git_repositories(&self, dot_git_paths: Vec<PathBuf>) {
4757        log::trace!("reloading repositories: {dot_git_paths:?}");
4758        let mut state = self.state.lock();
4759        let scan_id = state.snapshot.scan_id;
4760        for dot_git_dir in dot_git_paths {
4761            let existing_repository_entry =
4762                state
4763                    .snapshot
4764                    .git_repositories
4765                    .iter()
4766                    .find_map(|(_, repo)| {
4767                        if repo.common_dir_abs_path.as_ref() == &dot_git_dir
4768                            || repo.repository_dir_abs_path.as_ref() == &dot_git_dir
4769                        {
4770                            Some(repo.clone())
4771                        } else {
4772                            None
4773                        }
4774                    });
4775
4776            match existing_repository_entry {
4777                None => {
4778                    let Ok(relative) = dot_git_dir.strip_prefix(state.snapshot.abs_path()) else {
4779                        return;
4780                    };
4781                    state.insert_git_repository(
4782                        relative.into(),
4783                        self.fs.as_ref(),
4784                        self.watcher.as_ref(),
4785                    );
4786                }
4787                Some(local_repository) => {
4788                    state.snapshot.git_repositories.update(
4789                        &local_repository.work_directory_id,
4790                        |entry| {
4791                            entry.git_dir_scan_id = scan_id;
4792                        },
4793                    );
4794                }
4795            };
4796        }
4797
4798        // Remove any git repositories whose .git entry no longer exists.
4799        let snapshot = &mut state.snapshot;
4800        let mut ids_to_preserve = HashSet::default();
4801        for (&work_directory_id, entry) in snapshot.git_repositories.iter() {
4802            let exists_in_snapshot = snapshot
4803                .entry_for_id(work_directory_id)
4804                .map_or(false, |entry| {
4805                    snapshot.entry_for_path(entry.path.join(*DOT_GIT)).is_some()
4806                });
4807
4808            if exists_in_snapshot
4809                || matches!(
4810                    smol::block_on(self.fs.metadata(&entry.common_dir_abs_path)),
4811                    Ok(Some(_))
4812                )
4813            {
4814                ids_to_preserve.insert(work_directory_id);
4815            }
4816        }
4817
4818        snapshot
4819            .git_repositories
4820            .retain(|work_directory_id, _| ids_to_preserve.contains(work_directory_id));
4821    }
4822
4823    async fn progress_timer(&self, running: bool) {
4824        if !running {
4825            return futures::future::pending().await;
4826        }
4827
4828        #[cfg(any(test, feature = "test-support"))]
4829        if self.fs.is_fake() {
4830            return self.executor.simulate_random_delay().await;
4831        }
4832
4833        smol::Timer::after(FS_WATCH_LATENCY).await;
4834    }
4835
4836    fn is_path_private(&self, path: &Path) -> bool {
4837        !self.share_private_files && self.settings.is_path_private(path)
4838    }
4839
4840    async fn next_scan_request(&self) -> Result<ScanRequest> {
4841        let mut request = self.scan_requests_rx.recv().await?;
4842        while let Ok(next_request) = self.scan_requests_rx.try_recv() {
4843            request.relative_paths.extend(next_request.relative_paths);
4844            request.done.extend(next_request.done);
4845        }
4846        Ok(request)
4847    }
4848}
4849
4850async fn discover_ancestor_git_repo(
4851    fs: Arc<dyn Fs>,
4852    root_abs_path: &SanitizedPath,
4853) -> (
4854    HashMap<Arc<Path>, (Arc<Gitignore>, bool)>,
4855    Option<(PathBuf, WorkDirectory)>,
4856) {
4857    let mut ignores = HashMap::default();
4858    for (index, ancestor) in root_abs_path.as_path().ancestors().enumerate() {
4859        if index != 0 {
4860            if Some(ancestor) == fs.home_dir().as_deref() {
4861                // Unless $HOME is itself the worktree root, don't consider it as a
4862                // containing git repository---expensive and likely unwanted.
4863                break;
4864            } else if let Ok(ignore) =
4865                build_gitignore(&ancestor.join(*GITIGNORE), fs.as_ref()).await
4866            {
4867                ignores.insert(ancestor.into(), (ignore.into(), false));
4868            }
4869        }
4870
4871        let ancestor_dot_git = ancestor.join(*DOT_GIT);
4872        log::trace!("considering ancestor: {ancestor_dot_git:?}");
4873        // Check whether the directory or file called `.git` exists (in the
4874        // case of worktrees it's a file.)
4875        if fs
4876            .metadata(&ancestor_dot_git)
4877            .await
4878            .is_ok_and(|metadata| metadata.is_some())
4879        {
4880            if index != 0 {
4881                // We canonicalize, since the FS events use the canonicalized path.
4882                if let Some(ancestor_dot_git) = fs.canonicalize(&ancestor_dot_git).await.log_err() {
4883                    let location_in_repo = root_abs_path
4884                        .as_path()
4885                        .strip_prefix(ancestor)
4886                        .unwrap()
4887                        .into();
4888                    log::info!("inserting parent git repo for this worktree: {location_in_repo:?}");
4889                    // We associate the external git repo with our root folder and
4890                    // also mark where in the git repo the root folder is located.
4891                    return (
4892                        ignores,
4893                        Some((
4894                            ancestor_dot_git,
4895                            WorkDirectory::AboveProject {
4896                                absolute_path: ancestor.into(),
4897                                location_in_repo,
4898                            },
4899                        )),
4900                    );
4901                };
4902            }
4903
4904            // Reached root of git repository.
4905            break;
4906        }
4907    }
4908
4909    (ignores, None)
4910}
4911
4912fn build_diff(
4913    phase: BackgroundScannerPhase,
4914    old_snapshot: &Snapshot,
4915    new_snapshot: &Snapshot,
4916    event_paths: &[Arc<Path>],
4917) -> UpdatedEntriesSet {
4918    use BackgroundScannerPhase::*;
4919    use PathChange::{Added, AddedOrUpdated, Loaded, Removed, Updated};
4920
4921    // Identify which paths have changed. Use the known set of changed
4922    // parent paths to optimize the search.
4923    let mut changes = Vec::new();
4924    let mut old_paths = old_snapshot.entries_by_path.cursor::<PathKey>(&());
4925    let mut new_paths = new_snapshot.entries_by_path.cursor::<PathKey>(&());
4926    let mut last_newly_loaded_dir_path = None;
4927    old_paths.next();
4928    new_paths.next();
4929    for path in event_paths {
4930        let path = PathKey(path.clone());
4931        if old_paths.item().map_or(false, |e| e.path < path.0) {
4932            old_paths.seek_forward(&path, Bias::Left);
4933        }
4934        if new_paths.item().map_or(false, |e| e.path < path.0) {
4935            new_paths.seek_forward(&path, Bias::Left);
4936        }
4937        loop {
4938            match (old_paths.item(), new_paths.item()) {
4939                (Some(old_entry), Some(new_entry)) => {
4940                    if old_entry.path > path.0
4941                        && new_entry.path > path.0
4942                        && !old_entry.path.starts_with(&path.0)
4943                        && !new_entry.path.starts_with(&path.0)
4944                    {
4945                        break;
4946                    }
4947
4948                    match Ord::cmp(&old_entry.path, &new_entry.path) {
4949                        Ordering::Less => {
4950                            changes.push((old_entry.path.clone(), old_entry.id, Removed));
4951                            old_paths.next();
4952                        }
4953                        Ordering::Equal => {
4954                            if phase == EventsReceivedDuringInitialScan {
4955                                if old_entry.id != new_entry.id {
4956                                    changes.push((old_entry.path.clone(), old_entry.id, Removed));
4957                                }
4958                                // If the worktree was not fully initialized when this event was generated,
4959                                // we can't know whether this entry was added during the scan or whether
4960                                // it was merely updated.
4961                                changes.push((
4962                                    new_entry.path.clone(),
4963                                    new_entry.id,
4964                                    AddedOrUpdated,
4965                                ));
4966                            } else if old_entry.id != new_entry.id {
4967                                changes.push((old_entry.path.clone(), old_entry.id, Removed));
4968                                changes.push((new_entry.path.clone(), new_entry.id, Added));
4969                            } else if old_entry != new_entry {
4970                                if old_entry.kind.is_unloaded() {
4971                                    last_newly_loaded_dir_path = Some(&new_entry.path);
4972                                    changes.push((new_entry.path.clone(), new_entry.id, Loaded));
4973                                } else {
4974                                    changes.push((new_entry.path.clone(), new_entry.id, Updated));
4975                                }
4976                            }
4977                            old_paths.next();
4978                            new_paths.next();
4979                        }
4980                        Ordering::Greater => {
4981                            let is_newly_loaded = phase == InitialScan
4982                                || last_newly_loaded_dir_path
4983                                    .as_ref()
4984                                    .map_or(false, |dir| new_entry.path.starts_with(dir));
4985                            changes.push((
4986                                new_entry.path.clone(),
4987                                new_entry.id,
4988                                if is_newly_loaded { Loaded } else { Added },
4989                            ));
4990                            new_paths.next();
4991                        }
4992                    }
4993                }
4994                (Some(old_entry), None) => {
4995                    changes.push((old_entry.path.clone(), old_entry.id, Removed));
4996                    old_paths.next();
4997                }
4998                (None, Some(new_entry)) => {
4999                    let is_newly_loaded = phase == InitialScan
5000                        || last_newly_loaded_dir_path
5001                            .as_ref()
5002                            .map_or(false, |dir| new_entry.path.starts_with(dir));
5003                    changes.push((
5004                        new_entry.path.clone(),
5005                        new_entry.id,
5006                        if is_newly_loaded { Loaded } else { Added },
5007                    ));
5008                    new_paths.next();
5009                }
5010                (None, None) => break,
5011            }
5012        }
5013    }
5014
5015    changes.into()
5016}
5017
5018fn swap_to_front(child_paths: &mut Vec<PathBuf>, file: &OsStr) {
5019    let position = child_paths
5020        .iter()
5021        .position(|path| path.file_name().unwrap() == file);
5022    if let Some(position) = position {
5023        let temp = child_paths.remove(position);
5024        child_paths.insert(0, temp);
5025    }
5026}
5027
5028fn char_bag_for_path(root_char_bag: CharBag, path: &Path) -> CharBag {
5029    let mut result = root_char_bag;
5030    result.extend(
5031        path.to_string_lossy()
5032            .chars()
5033            .map(|c| c.to_ascii_lowercase()),
5034    );
5035    result
5036}
5037
5038#[derive(Debug)]
5039struct ScanJob {
5040    abs_path: Arc<Path>,
5041    path: Arc<Path>,
5042    ignore_stack: Arc<IgnoreStack>,
5043    scan_queue: Sender<ScanJob>,
5044    ancestor_inodes: TreeSet<u64>,
5045    is_external: bool,
5046}
5047
5048struct UpdateIgnoreStatusJob {
5049    abs_path: Arc<Path>,
5050    ignore_stack: Arc<IgnoreStack>,
5051    ignore_queue: Sender<UpdateIgnoreStatusJob>,
5052    scan_queue: Sender<ScanJob>,
5053}
5054
5055pub trait WorktreeModelHandle {
5056    #[cfg(any(test, feature = "test-support"))]
5057    fn flush_fs_events<'a>(
5058        &self,
5059        cx: &'a mut gpui::TestAppContext,
5060    ) -> futures::future::LocalBoxFuture<'a, ()>;
5061
5062    #[cfg(any(test, feature = "test-support"))]
5063    fn flush_fs_events_in_root_git_repository<'a>(
5064        &self,
5065        cx: &'a mut gpui::TestAppContext,
5066    ) -> futures::future::LocalBoxFuture<'a, ()>;
5067}
5068
5069impl WorktreeModelHandle for Entity<Worktree> {
5070    // When the worktree's FS event stream sometimes delivers "redundant" events for FS changes that
5071    // occurred before the worktree was constructed. These events can cause the worktree to perform
5072    // extra directory scans, and emit extra scan-state notifications.
5073    //
5074    // This function mutates the worktree's directory and waits for those mutations to be picked up,
5075    // to ensure that all redundant FS events have already been processed.
5076    #[cfg(any(test, feature = "test-support"))]
5077    fn flush_fs_events<'a>(
5078        &self,
5079        cx: &'a mut gpui::TestAppContext,
5080    ) -> futures::future::LocalBoxFuture<'a, ()> {
5081        let file_name = "fs-event-sentinel";
5082
5083        let tree = self.clone();
5084        let (fs, root_path) = self.read_with(cx, |tree, _| {
5085            let tree = tree.as_local().unwrap();
5086            (tree.fs.clone(), tree.abs_path().clone())
5087        });
5088
5089        async move {
5090            fs.create_file(&root_path.join(file_name), Default::default())
5091                .await
5092                .unwrap();
5093
5094            let mut events = cx.events(&tree);
5095            while events.next().await.is_some() {
5096                if tree.read_with(cx, |tree, _| tree.entry_for_path(file_name).is_some()) {
5097                    break;
5098                }
5099            }
5100
5101            fs.remove_file(&root_path.join(file_name), Default::default())
5102                .await
5103                .unwrap();
5104            while events.next().await.is_some() {
5105                if tree.read_with(cx, |tree, _| tree.entry_for_path(file_name).is_none()) {
5106                    break;
5107                }
5108            }
5109
5110            cx.update(|cx| tree.read(cx).as_local().unwrap().scan_complete())
5111                .await;
5112        }
5113        .boxed_local()
5114    }
5115
5116    // This function is similar to flush_fs_events, except that it waits for events to be flushed in
5117    // the .git folder of the root repository.
5118    // The reason for its existence is that a repository's .git folder might live *outside* of the
5119    // worktree and thus its FS events might go through a different path.
5120    // In order to flush those, we need to create artificial events in the .git folder and wait
5121    // for the repository to be reloaded.
5122    #[cfg(any(test, feature = "test-support"))]
5123    fn flush_fs_events_in_root_git_repository<'a>(
5124        &self,
5125        cx: &'a mut gpui::TestAppContext,
5126    ) -> futures::future::LocalBoxFuture<'a, ()> {
5127        let file_name = "fs-event-sentinel";
5128
5129        let tree = self.clone();
5130        let (fs, root_path, mut git_dir_scan_id) = self.read_with(cx, |tree, _| {
5131            let tree = tree.as_local().unwrap();
5132            let local_repo_entry = tree
5133                .git_repositories
5134                .values()
5135                .min_by_key(|local_repo_entry| local_repo_entry.work_directory.clone())
5136                .unwrap();
5137            (
5138                tree.fs.clone(),
5139                local_repo_entry.common_dir_abs_path.clone(),
5140                local_repo_entry.git_dir_scan_id,
5141            )
5142        });
5143
5144        let scan_id_increased = |tree: &mut Worktree, git_dir_scan_id: &mut usize| {
5145            let tree = tree.as_local().unwrap();
5146            // let repository = tree.repositories.first().unwrap();
5147            let local_repo_entry = tree
5148                .git_repositories
5149                .values()
5150                .min_by_key(|local_repo_entry| local_repo_entry.work_directory.clone())
5151                .unwrap();
5152
5153            if local_repo_entry.git_dir_scan_id > *git_dir_scan_id {
5154                *git_dir_scan_id = local_repo_entry.git_dir_scan_id;
5155                true
5156            } else {
5157                false
5158            }
5159        };
5160
5161        async move {
5162            fs.create_file(&root_path.join(file_name), Default::default())
5163                .await
5164                .unwrap();
5165
5166            let mut events = cx.events(&tree);
5167            while events.next().await.is_some() {
5168                if tree.update(cx, |tree, _| scan_id_increased(tree, &mut git_dir_scan_id)) {
5169                    break;
5170                }
5171            }
5172
5173            fs.remove_file(&root_path.join(file_name), Default::default())
5174                .await
5175                .unwrap();
5176
5177            while events.next().await.is_some() {
5178                if tree.update(cx, |tree, _| scan_id_increased(tree, &mut git_dir_scan_id)) {
5179                    break;
5180                }
5181            }
5182
5183            cx.update(|cx| tree.read(cx).as_local().unwrap().scan_complete())
5184                .await;
5185        }
5186        .boxed_local()
5187    }
5188}
5189
5190#[derive(Clone, Debug)]
5191struct TraversalProgress<'a> {
5192    max_path: &'a Path,
5193    count: usize,
5194    non_ignored_count: usize,
5195    file_count: usize,
5196    non_ignored_file_count: usize,
5197}
5198
5199impl TraversalProgress<'_> {
5200    fn count(&self, include_files: bool, include_dirs: bool, include_ignored: bool) -> usize {
5201        match (include_files, include_dirs, include_ignored) {
5202            (true, true, true) => self.count,
5203            (true, true, false) => self.non_ignored_count,
5204            (true, false, true) => self.file_count,
5205            (true, false, false) => self.non_ignored_file_count,
5206            (false, true, true) => self.count - self.file_count,
5207            (false, true, false) => self.non_ignored_count - self.non_ignored_file_count,
5208            (false, false, _) => 0,
5209        }
5210    }
5211}
5212
5213impl<'a> sum_tree::Dimension<'a, EntrySummary> for TraversalProgress<'a> {
5214    fn zero(_cx: &()) -> Self {
5215        Default::default()
5216    }
5217
5218    fn add_summary(&mut self, summary: &'a EntrySummary, _: &()) {
5219        self.max_path = summary.max_path.as_ref();
5220        self.count += summary.count;
5221        self.non_ignored_count += summary.non_ignored_count;
5222        self.file_count += summary.file_count;
5223        self.non_ignored_file_count += summary.non_ignored_file_count;
5224    }
5225}
5226
5227impl Default for TraversalProgress<'_> {
5228    fn default() -> Self {
5229        Self {
5230            max_path: Path::new(""),
5231            count: 0,
5232            non_ignored_count: 0,
5233            file_count: 0,
5234            non_ignored_file_count: 0,
5235        }
5236    }
5237}
5238
5239#[derive(Debug)]
5240pub struct Traversal<'a> {
5241    snapshot: &'a Snapshot,
5242    cursor: sum_tree::Cursor<'a, Entry, TraversalProgress<'a>>,
5243    include_ignored: bool,
5244    include_files: bool,
5245    include_dirs: bool,
5246}
5247
5248impl<'a> Traversal<'a> {
5249    fn new(
5250        snapshot: &'a Snapshot,
5251        include_files: bool,
5252        include_dirs: bool,
5253        include_ignored: bool,
5254        start_path: &Path,
5255    ) -> Self {
5256        let mut cursor = snapshot.entries_by_path.cursor(&());
5257        cursor.seek(&TraversalTarget::path(start_path), Bias::Left);
5258        let mut traversal = Self {
5259            snapshot,
5260            cursor,
5261            include_files,
5262            include_dirs,
5263            include_ignored,
5264        };
5265        if traversal.end_offset() == traversal.start_offset() {
5266            traversal.next();
5267        }
5268        traversal
5269    }
5270
5271    pub fn advance(&mut self) -> bool {
5272        self.advance_by(1)
5273    }
5274
5275    pub fn advance_by(&mut self, count: usize) -> bool {
5276        self.cursor.seek_forward(
5277            &TraversalTarget::Count {
5278                count: self.end_offset() + count,
5279                include_dirs: self.include_dirs,
5280                include_files: self.include_files,
5281                include_ignored: self.include_ignored,
5282            },
5283            Bias::Left,
5284        )
5285    }
5286
5287    pub fn advance_to_sibling(&mut self) -> bool {
5288        while let Some(entry) = self.cursor.item() {
5289            self.cursor
5290                .seek_forward(&TraversalTarget::successor(&entry.path), Bias::Left);
5291            if let Some(entry) = self.cursor.item() {
5292                if (self.include_files || !entry.is_file())
5293                    && (self.include_dirs || !entry.is_dir())
5294                    && (self.include_ignored || !entry.is_ignored || entry.is_always_included)
5295                {
5296                    return true;
5297                }
5298            }
5299        }
5300        false
5301    }
5302
5303    pub fn back_to_parent(&mut self) -> bool {
5304        let Some(parent_path) = self.cursor.item().and_then(|entry| entry.path.parent()) else {
5305            return false;
5306        };
5307        self.cursor
5308            .seek(&TraversalTarget::path(parent_path), Bias::Left)
5309    }
5310
5311    pub fn entry(&self) -> Option<&'a Entry> {
5312        self.cursor.item()
5313    }
5314
5315    pub fn snapshot(&self) -> &'a Snapshot {
5316        self.snapshot
5317    }
5318
5319    pub fn start_offset(&self) -> usize {
5320        self.cursor
5321            .start()
5322            .count(self.include_files, self.include_dirs, self.include_ignored)
5323    }
5324
5325    pub fn end_offset(&self) -> usize {
5326        self.cursor
5327            .end()
5328            .count(self.include_files, self.include_dirs, self.include_ignored)
5329    }
5330}
5331
5332impl<'a> Iterator for Traversal<'a> {
5333    type Item = &'a Entry;
5334
5335    fn next(&mut self) -> Option<Self::Item> {
5336        if let Some(item) = self.entry() {
5337            self.advance();
5338            Some(item)
5339        } else {
5340            None
5341        }
5342    }
5343}
5344
5345#[derive(Debug, Clone, Copy)]
5346pub enum PathTarget<'a> {
5347    Path(&'a Path),
5348    Successor(&'a Path),
5349}
5350
5351impl PathTarget<'_> {
5352    fn cmp_path(&self, other: &Path) -> Ordering {
5353        match self {
5354            PathTarget::Path(path) => path.cmp(&other),
5355            PathTarget::Successor(path) => {
5356                if other.starts_with(path) {
5357                    Ordering::Greater
5358                } else {
5359                    Ordering::Equal
5360                }
5361            }
5362        }
5363    }
5364}
5365
5366impl<'a, S: Summary> SeekTarget<'a, PathSummary<S>, PathProgress<'a>> for PathTarget<'_> {
5367    fn cmp(&self, cursor_location: &PathProgress<'a>, _: &S::Context) -> Ordering {
5368        self.cmp_path(&cursor_location.max_path)
5369    }
5370}
5371
5372impl<'a, S: Summary> SeekTarget<'a, PathSummary<S>, TraversalProgress<'a>> for PathTarget<'_> {
5373    fn cmp(&self, cursor_location: &TraversalProgress<'a>, _: &S::Context) -> Ordering {
5374        self.cmp_path(&cursor_location.max_path)
5375    }
5376}
5377
5378#[derive(Debug)]
5379enum TraversalTarget<'a> {
5380    Path(PathTarget<'a>),
5381    Count {
5382        count: usize,
5383        include_files: bool,
5384        include_ignored: bool,
5385        include_dirs: bool,
5386    },
5387}
5388
5389impl<'a> TraversalTarget<'a> {
5390    fn path(path: &'a Path) -> Self {
5391        Self::Path(PathTarget::Path(path))
5392    }
5393
5394    fn successor(path: &'a Path) -> Self {
5395        Self::Path(PathTarget::Successor(path))
5396    }
5397
5398    fn cmp_progress(&self, progress: &TraversalProgress) -> Ordering {
5399        match self {
5400            TraversalTarget::Path(path) => path.cmp_path(&progress.max_path),
5401            TraversalTarget::Count {
5402                count,
5403                include_files,
5404                include_dirs,
5405                include_ignored,
5406            } => Ord::cmp(
5407                count,
5408                &progress.count(*include_files, *include_dirs, *include_ignored),
5409            ),
5410        }
5411    }
5412}
5413
5414impl<'a> SeekTarget<'a, EntrySummary, TraversalProgress<'a>> for TraversalTarget<'_> {
5415    fn cmp(&self, cursor_location: &TraversalProgress<'a>, _: &()) -> Ordering {
5416        self.cmp_progress(cursor_location)
5417    }
5418}
5419
5420impl<'a> SeekTarget<'a, PathSummary<Unit>, TraversalProgress<'a>> for TraversalTarget<'_> {
5421    fn cmp(&self, cursor_location: &TraversalProgress<'a>, _: &()) -> Ordering {
5422        self.cmp_progress(cursor_location)
5423    }
5424}
5425
5426pub struct ChildEntriesOptions {
5427    pub include_files: bool,
5428    pub include_dirs: bool,
5429    pub include_ignored: bool,
5430}
5431
5432pub struct ChildEntriesIter<'a> {
5433    parent_path: &'a Path,
5434    traversal: Traversal<'a>,
5435}
5436
5437impl<'a> Iterator for ChildEntriesIter<'a> {
5438    type Item = &'a Entry;
5439
5440    fn next(&mut self) -> Option<Self::Item> {
5441        if let Some(item) = self.traversal.entry() {
5442            if item.path.starts_with(self.parent_path) {
5443                self.traversal.advance_to_sibling();
5444                return Some(item);
5445            }
5446        }
5447        None
5448    }
5449}
5450
5451impl<'a> From<&'a Entry> for proto::Entry {
5452    fn from(entry: &'a Entry) -> Self {
5453        Self {
5454            id: entry.id.to_proto(),
5455            is_dir: entry.is_dir(),
5456            path: entry.path.as_ref().to_proto(),
5457            inode: entry.inode,
5458            mtime: entry.mtime.map(|time| time.into()),
5459            is_ignored: entry.is_ignored,
5460            is_external: entry.is_external,
5461            is_fifo: entry.is_fifo,
5462            size: Some(entry.size),
5463            canonical_path: entry
5464                .canonical_path
5465                .as_ref()
5466                .map(|path| path.as_ref().to_proto()),
5467        }
5468    }
5469}
5470
5471impl<'a> TryFrom<(&'a CharBag, &PathMatcher, proto::Entry)> for Entry {
5472    type Error = anyhow::Error;
5473
5474    fn try_from(
5475        (root_char_bag, always_included, entry): (&'a CharBag, &PathMatcher, proto::Entry),
5476    ) -> Result<Self> {
5477        let kind = if entry.is_dir {
5478            EntryKind::Dir
5479        } else {
5480            EntryKind::File
5481        };
5482
5483        let path = Arc::<Path>::from_proto(entry.path);
5484        let char_bag = char_bag_for_path(*root_char_bag, &path);
5485        let is_always_included = always_included.is_match(path.as_ref());
5486        Ok(Entry {
5487            id: ProjectEntryId::from_proto(entry.id),
5488            kind,
5489            path,
5490            inode: entry.inode,
5491            mtime: entry.mtime.map(|time| time.into()),
5492            size: entry.size.unwrap_or(0),
5493            canonical_path: entry
5494                .canonical_path
5495                .map(|path_string| Arc::from(PathBuf::from_proto(path_string))),
5496            is_ignored: entry.is_ignored,
5497            is_always_included,
5498            is_external: entry.is_external,
5499            is_private: false,
5500            char_bag,
5501            is_fifo: entry.is_fifo,
5502        })
5503    }
5504}
5505
5506#[derive(Clone, Copy, Debug, Default, Hash, PartialEq, Eq, PartialOrd, Ord)]
5507pub struct ProjectEntryId(usize);
5508
5509impl ProjectEntryId {
5510    pub const MAX: Self = Self(usize::MAX);
5511    pub const MIN: Self = Self(usize::MIN);
5512
5513    pub fn new(counter: &AtomicUsize) -> Self {
5514        Self(counter.fetch_add(1, SeqCst))
5515    }
5516
5517    pub fn from_proto(id: u64) -> Self {
5518        Self(id as usize)
5519    }
5520
5521    pub fn to_proto(&self) -> u64 {
5522        self.0 as u64
5523    }
5524
5525    pub fn from_usize(id: usize) -> Self {
5526        ProjectEntryId(id)
5527    }
5528
5529    pub fn to_usize(&self) -> usize {
5530        self.0
5531    }
5532}
5533
5534#[cfg(any(test, feature = "test-support"))]
5535impl CreatedEntry {
5536    pub fn to_included(self) -> Option<Entry> {
5537        match self {
5538            CreatedEntry::Included(entry) => Some(entry),
5539            CreatedEntry::Excluded { .. } => None,
5540        }
5541    }
5542}
5543
5544fn parse_gitfile(content: &str) -> anyhow::Result<&Path> {
5545    let path = content
5546        .strip_prefix("gitdir:")
5547        .with_context(|| format!("parsing gitfile content {content:?}"))?;
5548    Ok(Path::new(path.trim()))
5549}
5550
5551fn discover_git_paths(dot_git_abs_path: &Arc<Path>, fs: &dyn Fs) -> (Arc<Path>, Arc<Path>) {
5552    let mut repository_dir_abs_path = dot_git_abs_path.clone();
5553    let mut common_dir_abs_path = dot_git_abs_path.clone();
5554
5555    if let Some(path) = smol::block_on(fs.load(&dot_git_abs_path))
5556        .ok()
5557        .as_ref()
5558        .and_then(|contents| parse_gitfile(contents).log_err())
5559    {
5560        let path = dot_git_abs_path
5561            .parent()
5562            .unwrap_or(Path::new(""))
5563            .join(path);
5564        if let Some(path) = smol::block_on(fs.canonicalize(&path)).log_err() {
5565            repository_dir_abs_path = Path::new(&path).into();
5566            common_dir_abs_path = repository_dir_abs_path.clone();
5567            if let Some(commondir_contents) = smol::block_on(fs.load(&path.join("commondir"))).ok()
5568            {
5569                if let Some(commondir_path) =
5570                    smol::block_on(fs.canonicalize(&path.join(commondir_contents.trim()))).log_err()
5571                {
5572                    common_dir_abs_path = commondir_path.as_path().into();
5573                }
5574            }
5575        }
5576    };
5577
5578    (repository_dir_abs_path, common_dir_abs_path)
5579}