extension_host.rs

   1pub mod extension_settings;
   2pub mod headless_host;
   3pub mod wasm_host;
   4
   5#[cfg(test)]
   6mod extension_store_test;
   7
   8use anyhow::{Context as _, Result, anyhow, bail};
   9use async_compression::futures::bufread::GzipDecoder;
  10use async_tar::Archive;
  11use client::ExtensionProvides;
  12use client::{Client, ExtensionMetadata, GetExtensionsResponse, proto, telemetry::Telemetry};
  13use collections::{BTreeMap, BTreeSet, HashMap, HashSet, btree_map};
  14pub use extension::ExtensionManifest;
  15use extension::extension_builder::{CompileExtensionOptions, ExtensionBuilder};
  16use extension::{
  17    ExtensionContextServerProxy, ExtensionEvents, ExtensionGrammarProxy, ExtensionHostProxy,
  18    ExtensionIndexedDocsProviderProxy, ExtensionLanguageProxy, ExtensionLanguageServerProxy,
  19    ExtensionSlashCommandProxy, ExtensionSnippetProxy, ExtensionThemeProxy,
  20};
  21use fs::{Fs, RemoveOptions};
  22use futures::{
  23    AsyncReadExt as _, Future, FutureExt as _, StreamExt as _,
  24    channel::{
  25        mpsc::{UnboundedSender, unbounded},
  26        oneshot,
  27    },
  28    io::BufReader,
  29    select_biased,
  30};
  31use gpui::{
  32    App, AppContext as _, AsyncApp, Context, Entity, EventEmitter, Global, Task, WeakEntity,
  33    actions,
  34};
  35use http_client::{AsyncBody, HttpClient, HttpClientWithUrl};
  36use language::{
  37    LanguageConfig, LanguageName, LanguageQueries, LoadedLanguage, QUERY_FILENAME_PREFIXES, Rope,
  38};
  39use node_runtime::NodeRuntime;
  40use project::ContextProviderWithTasks;
  41use release_channel::ReleaseChannel;
  42use remote::SshRemoteClient;
  43use semantic_version::SemanticVersion;
  44use serde::{Deserialize, Serialize};
  45use settings::Settings;
  46use std::ops::RangeInclusive;
  47use std::str::FromStr;
  48use std::{
  49    cmp::Ordering,
  50    path::{self, Path, PathBuf},
  51    sync::Arc,
  52    time::{Duration, Instant},
  53};
  54use url::Url;
  55use util::ResultExt;
  56use wasm_host::{
  57    WasmExtension, WasmHost,
  58    wit::{is_supported_wasm_api_version, wasm_api_version_range},
  59};
  60
  61pub use extension::{
  62    ExtensionLibraryKind, GrammarManifestEntry, OldExtensionManifest, SchemaVersion,
  63};
  64pub use extension_settings::ExtensionSettings;
  65
  66pub const RELOAD_DEBOUNCE_DURATION: Duration = Duration::from_millis(200);
  67const FS_WATCH_LATENCY: Duration = Duration::from_millis(100);
  68
  69/// The current extension [`SchemaVersion`] supported by Zed.
  70const CURRENT_SCHEMA_VERSION: SchemaVersion = SchemaVersion(1);
  71
  72/// Returns the [`SchemaVersion`] range that is compatible with this version of Zed.
  73pub fn schema_version_range() -> RangeInclusive<SchemaVersion> {
  74    SchemaVersion::ZERO..=CURRENT_SCHEMA_VERSION
  75}
  76
  77/// Returns whether the given extension version is compatible with this version of Zed.
  78pub fn is_version_compatible(
  79    release_channel: ReleaseChannel,
  80    extension_version: &ExtensionMetadata,
  81) -> bool {
  82    let schema_version = extension_version.manifest.schema_version.unwrap_or(0);
  83    if CURRENT_SCHEMA_VERSION.0 < schema_version {
  84        return false;
  85    }
  86
  87    if let Some(wasm_api_version) = extension_version
  88        .manifest
  89        .wasm_api_version
  90        .as_ref()
  91        .and_then(|wasm_api_version| SemanticVersion::from_str(wasm_api_version).ok())
  92    {
  93        if !is_supported_wasm_api_version(release_channel, wasm_api_version) {
  94            return false;
  95        }
  96    }
  97
  98    true
  99}
 100
 101pub struct ExtensionStore {
 102    pub proxy: Arc<ExtensionHostProxy>,
 103    pub builder: Arc<ExtensionBuilder>,
 104    pub extension_index: ExtensionIndex,
 105    pub fs: Arc<dyn Fs>,
 106    pub http_client: Arc<HttpClientWithUrl>,
 107    pub telemetry: Option<Arc<Telemetry>>,
 108    pub reload_tx: UnboundedSender<Option<Arc<str>>>,
 109    pub reload_complete_senders: Vec<oneshot::Sender<()>>,
 110    pub installed_dir: PathBuf,
 111    pub outstanding_operations: BTreeMap<Arc<str>, ExtensionOperation>,
 112    pub index_path: PathBuf,
 113    pub modified_extensions: HashSet<Arc<str>>,
 114    pub wasm_host: Arc<WasmHost>,
 115    pub wasm_extensions: Vec<(Arc<ExtensionManifest>, WasmExtension)>,
 116    pub tasks: Vec<Task<()>>,
 117    pub ssh_clients: HashMap<String, WeakEntity<SshRemoteClient>>,
 118    pub ssh_registered_tx: UnboundedSender<()>,
 119}
 120
 121#[derive(Clone, Copy)]
 122pub enum ExtensionOperation {
 123    Upgrade,
 124    Install,
 125    Remove,
 126}
 127
 128#[derive(Clone)]
 129pub enum Event {
 130    ExtensionsUpdated,
 131    StartedReloading,
 132    ExtensionInstalled(Arc<str>),
 133    ExtensionFailedToLoad(Arc<str>),
 134}
 135
 136impl EventEmitter<Event> for ExtensionStore {}
 137
 138struct GlobalExtensionStore(Entity<ExtensionStore>);
 139
 140impl Global for GlobalExtensionStore {}
 141
 142#[derive(Deserialize, Serialize, Default)]
 143pub struct ExtensionIndex {
 144    pub extensions: BTreeMap<Arc<str>, ExtensionIndexEntry>,
 145    pub themes: BTreeMap<Arc<str>, ExtensionIndexThemeEntry>,
 146    #[serde(default)]
 147    pub icon_themes: BTreeMap<Arc<str>, ExtensionIndexIconThemeEntry>,
 148    pub languages: BTreeMap<LanguageName, ExtensionIndexLanguageEntry>,
 149}
 150
 151#[derive(Clone, PartialEq, Eq, Debug, Deserialize, Serialize)]
 152pub struct ExtensionIndexEntry {
 153    pub manifest: Arc<ExtensionManifest>,
 154    pub dev: bool,
 155}
 156
 157#[derive(Clone, PartialEq, Eq, PartialOrd, Ord, Debug, Deserialize, Serialize)]
 158pub struct ExtensionIndexThemeEntry {
 159    pub extension: Arc<str>,
 160    pub path: PathBuf,
 161}
 162
 163#[derive(Clone, PartialEq, Eq, PartialOrd, Ord, Debug, Deserialize, Serialize)]
 164pub struct ExtensionIndexIconThemeEntry {
 165    pub extension: Arc<str>,
 166    pub path: PathBuf,
 167}
 168
 169#[derive(Clone, Debug, Deserialize, Serialize)]
 170pub struct ExtensionIndexLanguageEntry {
 171    pub extension: Arc<str>,
 172    pub path: PathBuf,
 173    #[serde(skip)]
 174    pub config: LanguageConfig,
 175}
 176
 177actions!(zed, [ReloadExtensions]);
 178
 179pub fn init(
 180    extension_host_proxy: Arc<ExtensionHostProxy>,
 181    fs: Arc<dyn Fs>,
 182    client: Arc<Client>,
 183    node_runtime: NodeRuntime,
 184    cx: &mut App,
 185) {
 186    ExtensionSettings::register(cx);
 187
 188    let store = cx.new(move |cx| {
 189        ExtensionStore::new(
 190            paths::extensions_dir().clone(),
 191            None,
 192            extension_host_proxy,
 193            fs,
 194            client.http_client(),
 195            client.http_client(),
 196            Some(client.telemetry().clone()),
 197            node_runtime,
 198            cx,
 199        )
 200    });
 201
 202    cx.on_action(|_: &ReloadExtensions, cx| {
 203        let store = cx.global::<GlobalExtensionStore>().0.clone();
 204        store.update(cx, |store, cx| drop(store.reload(None, cx)));
 205    });
 206
 207    cx.set_global(GlobalExtensionStore(store));
 208}
 209
 210impl ExtensionStore {
 211    pub fn try_global(cx: &App) -> Option<Entity<Self>> {
 212        cx.try_global::<GlobalExtensionStore>()
 213            .map(|store| store.0.clone())
 214    }
 215
 216    pub fn global(cx: &App) -> Entity<Self> {
 217        cx.global::<GlobalExtensionStore>().0.clone()
 218    }
 219
 220    pub fn new(
 221        extensions_dir: PathBuf,
 222        build_dir: Option<PathBuf>,
 223        extension_host_proxy: Arc<ExtensionHostProxy>,
 224        fs: Arc<dyn Fs>,
 225        http_client: Arc<HttpClientWithUrl>,
 226        builder_client: Arc<dyn HttpClient>,
 227        telemetry: Option<Arc<Telemetry>>,
 228        node_runtime: NodeRuntime,
 229        cx: &mut Context<Self>,
 230    ) -> Self {
 231        let work_dir = extensions_dir.join("work");
 232        let build_dir = build_dir.unwrap_or_else(|| extensions_dir.join("build"));
 233        let installed_dir = extensions_dir.join("installed");
 234        let index_path = extensions_dir.join("index.json");
 235
 236        let (reload_tx, mut reload_rx) = unbounded();
 237        let (connection_registered_tx, mut connection_registered_rx) = unbounded();
 238        let mut this = Self {
 239            proxy: extension_host_proxy.clone(),
 240            extension_index: Default::default(),
 241            installed_dir,
 242            index_path,
 243            builder: Arc::new(ExtensionBuilder::new(builder_client, build_dir)),
 244            outstanding_operations: Default::default(),
 245            modified_extensions: Default::default(),
 246            reload_complete_senders: Vec::new(),
 247            wasm_host: WasmHost::new(
 248                fs.clone(),
 249                http_client.clone(),
 250                node_runtime,
 251                extension_host_proxy,
 252                work_dir,
 253                cx,
 254            ),
 255            wasm_extensions: Vec::new(),
 256            fs,
 257            http_client,
 258            telemetry,
 259            reload_tx,
 260            tasks: Vec::new(),
 261
 262            ssh_clients: HashMap::default(),
 263            ssh_registered_tx: connection_registered_tx,
 264        };
 265
 266        // The extensions store maintains an index file, which contains a complete
 267        // list of the installed extensions and the resources that they provide.
 268        // This index is loaded synchronously on startup.
 269        let (index_content, index_metadata, extensions_metadata) =
 270            cx.background_executor().block(async {
 271                futures::join!(
 272                    this.fs.load(&this.index_path),
 273                    this.fs.metadata(&this.index_path),
 274                    this.fs.metadata(&this.installed_dir),
 275                )
 276            });
 277
 278        // Normally, there is no need to rebuild the index. But if the index file
 279        // is invalid or is out-of-date according to the filesystem mtimes, then
 280        // it must be asynchronously rebuilt.
 281        let mut extension_index = ExtensionIndex::default();
 282        let mut extension_index_needs_rebuild = true;
 283        if let Ok(index_content) = index_content {
 284            if let Some(index) = serde_json::from_str(&index_content).log_err() {
 285                extension_index = index;
 286                if let (Ok(Some(index_metadata)), Ok(Some(extensions_metadata))) =
 287                    (index_metadata, extensions_metadata)
 288                {
 289                    if index_metadata
 290                        .mtime
 291                        .bad_is_greater_than(extensions_metadata.mtime)
 292                    {
 293                        extension_index_needs_rebuild = false;
 294                    }
 295                }
 296            }
 297        }
 298
 299        // Immediately load all of the extensions in the initial manifest. If the
 300        // index needs to be rebuild, then enqueue
 301        let load_initial_extensions = this.extensions_updated(extension_index, cx);
 302        let mut reload_future = None;
 303        if extension_index_needs_rebuild {
 304            reload_future = Some(this.reload(None, cx));
 305        }
 306
 307        cx.spawn(async move |this, cx| {
 308            if let Some(future) = reload_future {
 309                future.await;
 310            }
 311            this.update(cx, |this, cx| this.auto_install_extensions(cx))
 312                .ok();
 313            this.update(cx, |this, cx| this.check_for_updates(cx)).ok();
 314        })
 315        .detach();
 316
 317        // Perform all extension loading in a single task to ensure that we
 318        // never attempt to simultaneously load/unload extensions from multiple
 319        // parallel tasks.
 320        this.tasks.push(cx.spawn(async move |this, cx| {
 321            async move {
 322                load_initial_extensions.await;
 323
 324                let mut index_changed = false;
 325                let mut debounce_timer = cx.background_spawn(futures::future::pending()).fuse();
 326                loop {
 327                    select_biased! {
 328                        _ = debounce_timer => {
 329                            if index_changed {
 330                                let index = this
 331                                    .update(cx, |this, cx| this.rebuild_extension_index(cx))?
 332                                    .await;
 333                                this.update( cx, |this, cx| this.extensions_updated(index, cx))?
 334                                    .await;
 335                                index_changed = false;
 336                            }
 337
 338                            Self::update_ssh_clients(&this, cx).await?;
 339                        }
 340                        _ = connection_registered_rx.next() => {
 341                            debounce_timer = cx
 342                                .background_executor()
 343                                .timer(RELOAD_DEBOUNCE_DURATION)
 344                                .fuse();
 345                        }
 346                        extension_id = reload_rx.next() => {
 347                            let Some(extension_id) = extension_id else { break; };
 348                            this.update( cx, |this, _| {
 349                                this.modified_extensions.extend(extension_id);
 350                            })?;
 351                            index_changed = true;
 352                            debounce_timer = cx
 353                                .background_executor()
 354                                .timer(RELOAD_DEBOUNCE_DURATION)
 355                                .fuse();
 356                        }
 357                    }
 358                }
 359
 360                anyhow::Ok(())
 361            }
 362            .map(drop)
 363            .await;
 364        }));
 365
 366        // Watch the installed extensions directory for changes. Whenever changes are
 367        // detected, rebuild the extension index, and load/unload any extensions that
 368        // have been added, removed, or modified.
 369        this.tasks.push(cx.background_spawn({
 370            let fs = this.fs.clone();
 371            let reload_tx = this.reload_tx.clone();
 372            let installed_dir = this.installed_dir.clone();
 373            async move {
 374                let (mut paths, _) = fs.watch(&installed_dir, FS_WATCH_LATENCY).await;
 375                while let Some(events) = paths.next().await {
 376                    for event in events {
 377                        let Ok(event_path) = event.path.strip_prefix(&installed_dir) else {
 378                            continue;
 379                        };
 380
 381                        if let Some(path::Component::Normal(extension_dir_name)) =
 382                            event_path.components().next()
 383                        {
 384                            if let Some(extension_id) = extension_dir_name.to_str() {
 385                                reload_tx.unbounded_send(Some(extension_id.into())).ok();
 386                            }
 387                        }
 388                    }
 389                }
 390            }
 391        }));
 392
 393        this
 394    }
 395
 396    pub fn reload(
 397        &mut self,
 398        modified_extension: Option<Arc<str>>,
 399        cx: &mut Context<Self>,
 400    ) -> impl Future<Output = ()> + use<> {
 401        let (tx, rx) = oneshot::channel();
 402        self.reload_complete_senders.push(tx);
 403        self.reload_tx
 404            .unbounded_send(modified_extension)
 405            .expect("reload task exited");
 406        cx.emit(Event::StartedReloading);
 407
 408        async move {
 409            rx.await.ok();
 410        }
 411    }
 412
 413    fn extensions_dir(&self) -> PathBuf {
 414        self.installed_dir.clone()
 415    }
 416
 417    pub fn outstanding_operations(&self) -> &BTreeMap<Arc<str>, ExtensionOperation> {
 418        &self.outstanding_operations
 419    }
 420
 421    pub fn installed_extensions(&self) -> &BTreeMap<Arc<str>, ExtensionIndexEntry> {
 422        &self.extension_index.extensions
 423    }
 424
 425    pub fn dev_extensions(&self) -> impl Iterator<Item = &Arc<ExtensionManifest>> {
 426        self.extension_index
 427            .extensions
 428            .values()
 429            .filter_map(|extension| extension.dev.then_some(&extension.manifest))
 430    }
 431
 432    pub fn extension_manifest_for_id(&self, extension_id: &str) -> Option<&Arc<ExtensionManifest>> {
 433        self.extension_index
 434            .extensions
 435            .get(extension_id)
 436            .map(|extension| &extension.manifest)
 437    }
 438
 439    /// Returns the names of themes provided by extensions.
 440    pub fn extension_themes<'a>(
 441        &'a self,
 442        extension_id: &'a str,
 443    ) -> impl Iterator<Item = &'a Arc<str>> {
 444        self.extension_index
 445            .themes
 446            .iter()
 447            .filter_map(|(name, theme)| theme.extension.as_ref().eq(extension_id).then_some(name))
 448    }
 449
 450    /// Returns the path to the theme file within an extension, if there is an
 451    /// extension that provides the theme.
 452    pub fn path_to_extension_theme(&self, theme_name: &str) -> Option<PathBuf> {
 453        let entry = self.extension_index.themes.get(theme_name)?;
 454
 455        Some(
 456            self.extensions_dir()
 457                .join(entry.extension.as_ref())
 458                .join(&entry.path),
 459        )
 460    }
 461
 462    /// Returns the names of icon themes provided by extensions.
 463    pub fn extension_icon_themes<'a>(
 464        &'a self,
 465        extension_id: &'a str,
 466    ) -> impl Iterator<Item = &'a Arc<str>> {
 467        self.extension_index
 468            .icon_themes
 469            .iter()
 470            .filter_map(|(name, icon_theme)| {
 471                icon_theme
 472                    .extension
 473                    .as_ref()
 474                    .eq(extension_id)
 475                    .then_some(name)
 476            })
 477    }
 478
 479    /// Returns the path to the icon theme file within an extension, if there is
 480    /// an extension that provides the icon theme.
 481    pub fn path_to_extension_icon_theme(
 482        &self,
 483        icon_theme_name: &str,
 484    ) -> Option<(PathBuf, PathBuf)> {
 485        let entry = self.extension_index.icon_themes.get(icon_theme_name)?;
 486
 487        let icon_theme_path = self
 488            .extensions_dir()
 489            .join(entry.extension.as_ref())
 490            .join(&entry.path);
 491        let icons_root_path = self.extensions_dir().join(entry.extension.as_ref());
 492
 493        Some((icon_theme_path, icons_root_path))
 494    }
 495
 496    pub fn fetch_extensions(
 497        &self,
 498        search: Option<&str>,
 499        provides_filter: Option<&BTreeSet<ExtensionProvides>>,
 500        cx: &mut Context<Self>,
 501    ) -> Task<Result<Vec<ExtensionMetadata>>> {
 502        let version = CURRENT_SCHEMA_VERSION.to_string();
 503        let mut query = vec![("max_schema_version", version.as_str())];
 504        if let Some(search) = search {
 505            query.push(("filter", search));
 506        }
 507
 508        let provides_filter = provides_filter.map(|provides_filter| {
 509            provides_filter
 510                .iter()
 511                .map(|provides| provides.to_string())
 512                .collect::<Vec<_>>()
 513                .join(",")
 514        });
 515        if let Some(provides_filter) = provides_filter.as_deref() {
 516            query.push(("provides", provides_filter));
 517        }
 518
 519        self.fetch_extensions_from_api("/extensions", &query, cx)
 520    }
 521
 522    pub fn fetch_extensions_with_update_available(
 523        &mut self,
 524        cx: &mut Context<Self>,
 525    ) -> Task<Result<Vec<ExtensionMetadata>>> {
 526        let schema_versions = schema_version_range();
 527        let wasm_api_versions = wasm_api_version_range(ReleaseChannel::global(cx));
 528        let extension_settings = ExtensionSettings::get_global(cx);
 529        let extension_ids = self
 530            .extension_index
 531            .extensions
 532            .iter()
 533            .filter(|(id, entry)| !entry.dev && extension_settings.should_auto_update(id))
 534            .map(|(id, _)| id.as_ref())
 535            .collect::<Vec<_>>()
 536            .join(",");
 537        let task = self.fetch_extensions_from_api(
 538            "/extensions/updates",
 539            &[
 540                ("min_schema_version", &schema_versions.start().to_string()),
 541                ("max_schema_version", &schema_versions.end().to_string()),
 542                (
 543                    "min_wasm_api_version",
 544                    &wasm_api_versions.start().to_string(),
 545                ),
 546                ("max_wasm_api_version", &wasm_api_versions.end().to_string()),
 547                ("ids", &extension_ids),
 548            ],
 549            cx,
 550        );
 551        cx.spawn(async move |this, cx| {
 552            let extensions = task.await?;
 553            this.update(cx, |this, _cx| {
 554                extensions
 555                    .into_iter()
 556                    .filter(|extension| {
 557                        this.extension_index.extensions.get(&extension.id).map_or(
 558                            true,
 559                            |installed_extension| {
 560                                installed_extension.manifest.version != extension.manifest.version
 561                            },
 562                        )
 563                    })
 564                    .collect()
 565            })
 566        })
 567    }
 568
 569    pub fn fetch_extension_versions(
 570        &self,
 571        extension_id: &str,
 572        cx: &mut Context<Self>,
 573    ) -> Task<Result<Vec<ExtensionMetadata>>> {
 574        self.fetch_extensions_from_api(&format!("/extensions/{extension_id}"), &[], cx)
 575    }
 576
 577    /// Installs any extensions that should be included with Zed by default.
 578    ///
 579    /// This can be used to make certain functionality provided by extensions
 580    /// available out-of-the-box.
 581    pub fn auto_install_extensions(&mut self, cx: &mut Context<Self>) {
 582        let extension_settings = ExtensionSettings::get_global(cx);
 583
 584        let extensions_to_install = extension_settings
 585            .auto_install_extensions
 586            .keys()
 587            .filter(|extension_id| extension_settings.should_auto_install(extension_id))
 588            .filter(|extension_id| {
 589                let is_already_installed = self
 590                    .extension_index
 591                    .extensions
 592                    .contains_key(extension_id.as_ref());
 593                !is_already_installed
 594            })
 595            .cloned()
 596            .collect::<Vec<_>>();
 597
 598        cx.spawn(async move |this, cx| {
 599            for extension_id in extensions_to_install {
 600                this.update(cx, |this, cx| {
 601                    this.install_latest_extension(extension_id.clone(), cx);
 602                })
 603                .ok();
 604            }
 605        })
 606        .detach();
 607    }
 608
 609    pub fn check_for_updates(&mut self, cx: &mut Context<Self>) {
 610        let task = self.fetch_extensions_with_update_available(cx);
 611        cx.spawn(async move |this, cx| Self::upgrade_extensions(this, task.await?, cx).await)
 612            .detach();
 613    }
 614
 615    async fn upgrade_extensions(
 616        this: WeakEntity<Self>,
 617        extensions: Vec<ExtensionMetadata>,
 618        cx: &mut AsyncApp,
 619    ) -> Result<()> {
 620        for extension in extensions {
 621            let task = this.update(cx, |this, cx| {
 622                if let Some(installed_extension) =
 623                    this.extension_index.extensions.get(&extension.id)
 624                {
 625                    let installed_version =
 626                        SemanticVersion::from_str(&installed_extension.manifest.version).ok()?;
 627                    let latest_version =
 628                        SemanticVersion::from_str(&extension.manifest.version).ok()?;
 629
 630                    if installed_version >= latest_version {
 631                        return None;
 632                    }
 633                }
 634
 635                Some(this.upgrade_extension(extension.id, extension.manifest.version, cx))
 636            })?;
 637
 638            if let Some(task) = task {
 639                task.await.log_err();
 640            }
 641        }
 642        anyhow::Ok(())
 643    }
 644
 645    fn fetch_extensions_from_api(
 646        &self,
 647        path: &str,
 648        query: &[(&str, &str)],
 649        cx: &mut Context<ExtensionStore>,
 650    ) -> Task<Result<Vec<ExtensionMetadata>>> {
 651        let url = self.http_client.build_zed_api_url(path, query);
 652        let http_client = self.http_client.clone();
 653        cx.spawn(async move |_, _| {
 654            let mut response = http_client
 655                .get(url?.as_ref(), AsyncBody::empty(), true)
 656                .await?;
 657
 658            let mut body = Vec::new();
 659            response
 660                .body_mut()
 661                .read_to_end(&mut body)
 662                .await
 663                .context("error reading extensions")?;
 664
 665            if response.status().is_client_error() {
 666                let text = String::from_utf8_lossy(body.as_slice());
 667                bail!(
 668                    "status error {}, response: {text:?}",
 669                    response.status().as_u16()
 670                );
 671            }
 672
 673            let response: GetExtensionsResponse = serde_json::from_slice(&body)?;
 674            Ok(response.data)
 675        })
 676    }
 677
 678    pub fn install_extension(
 679        &mut self,
 680        extension_id: Arc<str>,
 681        version: Arc<str>,
 682        cx: &mut Context<Self>,
 683    ) {
 684        self.install_or_upgrade_extension(extension_id, version, ExtensionOperation::Install, cx)
 685            .detach_and_log_err(cx);
 686    }
 687
 688    fn install_or_upgrade_extension_at_endpoint(
 689        &mut self,
 690        extension_id: Arc<str>,
 691        url: Url,
 692        operation: ExtensionOperation,
 693        cx: &mut Context<Self>,
 694    ) -> Task<Result<()>> {
 695        let extension_dir = self.installed_dir.join(extension_id.as_ref());
 696        let http_client = self.http_client.clone();
 697        let fs = self.fs.clone();
 698
 699        match self.outstanding_operations.entry(extension_id.clone()) {
 700            btree_map::Entry::Occupied(_) => return Task::ready(Ok(())),
 701            btree_map::Entry::Vacant(e) => e.insert(operation),
 702        };
 703        cx.notify();
 704
 705        cx.spawn(async move |this, cx| {
 706            let _finish = cx.on_drop(&this, {
 707                let extension_id = extension_id.clone();
 708                move |this, cx| {
 709                    this.outstanding_operations.remove(extension_id.as_ref());
 710                    cx.notify();
 711                }
 712            });
 713
 714            let mut response = http_client
 715                .get(url.as_ref(), Default::default(), true)
 716                .await
 717                .map_err(|err| anyhow!("error downloading extension: {}", err))?;
 718
 719            fs.remove_dir(
 720                &extension_dir,
 721                RemoveOptions {
 722                    recursive: true,
 723                    ignore_if_not_exists: true,
 724                },
 725            )
 726            .await?;
 727
 728            let content_length = response
 729                .headers()
 730                .get(http_client::http::header::CONTENT_LENGTH)
 731                .and_then(|value| value.to_str().ok()?.parse::<usize>().ok());
 732
 733            let mut body = BufReader::new(response.body_mut());
 734            let mut tar_gz_bytes = Vec::new();
 735            body.read_to_end(&mut tar_gz_bytes).await?;
 736
 737            if let Some(content_length) = content_length {
 738                let actual_len = tar_gz_bytes.len();
 739                if content_length != actual_len {
 740                    bail!("downloaded extension size {actual_len} does not match content length {content_length}");
 741                }
 742            }
 743            let decompressed_bytes = GzipDecoder::new(BufReader::new(tar_gz_bytes.as_slice()));
 744            let archive = Archive::new(decompressed_bytes);
 745            archive.unpack(extension_dir).await?;
 746            this.update( cx, |this, cx| {
 747                this.reload(Some(extension_id.clone()), cx)
 748            })?
 749            .await;
 750
 751            if let ExtensionOperation::Install = operation {
 752                this.update( cx, |this, cx| {
 753                    cx.emit(Event::ExtensionInstalled(extension_id.clone()));
 754                    if let Some(events) = ExtensionEvents::try_global(cx) {
 755                        if let Some(manifest) = this.extension_manifest_for_id(&extension_id) {
 756                            events.update(cx, |this, cx| {
 757                                this.emit(
 758                                    extension::Event::ExtensionInstalled(manifest.clone()),
 759                                    cx,
 760                                )
 761                            });
 762                        }
 763                    }
 764                })
 765                .ok();
 766            }
 767
 768            anyhow::Ok(())
 769        })
 770    }
 771
 772    pub fn install_latest_extension(&mut self, extension_id: Arc<str>, cx: &mut Context<Self>) {
 773        log::info!("installing extension {extension_id} latest version");
 774
 775        let schema_versions = schema_version_range();
 776        let wasm_api_versions = wasm_api_version_range(ReleaseChannel::global(cx));
 777
 778        let Some(url) = self
 779            .http_client
 780            .build_zed_api_url(
 781                &format!("/extensions/{extension_id}/download"),
 782                &[
 783                    ("min_schema_version", &schema_versions.start().to_string()),
 784                    ("max_schema_version", &schema_versions.end().to_string()),
 785                    (
 786                        "min_wasm_api_version",
 787                        &wasm_api_versions.start().to_string(),
 788                    ),
 789                    ("max_wasm_api_version", &wasm_api_versions.end().to_string()),
 790                ],
 791            )
 792            .log_err()
 793        else {
 794            return;
 795        };
 796
 797        self.install_or_upgrade_extension_at_endpoint(
 798            extension_id,
 799            url,
 800            ExtensionOperation::Install,
 801            cx,
 802        )
 803        .detach_and_log_err(cx);
 804    }
 805
 806    pub fn upgrade_extension(
 807        &mut self,
 808        extension_id: Arc<str>,
 809        version: Arc<str>,
 810        cx: &mut Context<Self>,
 811    ) -> Task<Result<()>> {
 812        self.install_or_upgrade_extension(extension_id, version, ExtensionOperation::Upgrade, cx)
 813    }
 814
 815    fn install_or_upgrade_extension(
 816        &mut self,
 817        extension_id: Arc<str>,
 818        version: Arc<str>,
 819        operation: ExtensionOperation,
 820        cx: &mut Context<Self>,
 821    ) -> Task<Result<()>> {
 822        log::info!("installing extension {extension_id} {version}");
 823        let Some(url) = self
 824            .http_client
 825            .build_zed_api_url(
 826                &format!("/extensions/{extension_id}/{version}/download"),
 827                &[],
 828            )
 829            .log_err()
 830        else {
 831            return Task::ready(Ok(()));
 832        };
 833
 834        self.install_or_upgrade_extension_at_endpoint(extension_id, url, operation, cx)
 835    }
 836
 837    pub fn uninstall_extension(&mut self, extension_id: Arc<str>, cx: &mut Context<Self>) {
 838        let extension_dir = self.installed_dir.join(extension_id.as_ref());
 839        let work_dir = self.wasm_host.work_dir.join(extension_id.as_ref());
 840        let fs = self.fs.clone();
 841
 842        match self.outstanding_operations.entry(extension_id.clone()) {
 843            btree_map::Entry::Occupied(_) => return,
 844            btree_map::Entry::Vacant(e) => e.insert(ExtensionOperation::Remove),
 845        };
 846
 847        cx.spawn(async move |this, cx| {
 848            let _finish = cx.on_drop(&this, {
 849                let extension_id = extension_id.clone();
 850                move |this, cx| {
 851                    this.outstanding_operations.remove(extension_id.as_ref());
 852                    cx.notify();
 853                }
 854            });
 855
 856            fs.remove_dir(
 857                &extension_dir,
 858                RemoveOptions {
 859                    recursive: true,
 860                    ignore_if_not_exists: true,
 861                },
 862            )
 863            .await?;
 864
 865            // todo(windows)
 866            // Stop the server here.
 867            this.update(cx, |this, cx| this.reload(None, cx))?.await;
 868
 869            fs.remove_dir(
 870                &work_dir,
 871                RemoveOptions {
 872                    recursive: true,
 873                    ignore_if_not_exists: true,
 874                },
 875            )
 876            .await?;
 877
 878            anyhow::Ok(())
 879        })
 880        .detach_and_log_err(cx)
 881    }
 882
 883    pub fn install_dev_extension(
 884        &mut self,
 885        extension_source_path: PathBuf,
 886        cx: &mut Context<Self>,
 887    ) -> Task<Result<()>> {
 888        let extensions_dir = self.extensions_dir();
 889        let fs = self.fs.clone();
 890        let builder = self.builder.clone();
 891
 892        cx.spawn(async move |this, cx| {
 893            let mut extension_manifest =
 894                ExtensionManifest::load(fs.clone(), &extension_source_path).await?;
 895            let extension_id = extension_manifest.id.clone();
 896
 897            if !this.update(cx, |this, cx| {
 898                match this.outstanding_operations.entry(extension_id.clone()) {
 899                    btree_map::Entry::Occupied(_) => return false,
 900                    btree_map::Entry::Vacant(e) => e.insert(ExtensionOperation::Remove),
 901                };
 902                cx.notify();
 903                true
 904            })? {
 905                return Ok(());
 906            }
 907
 908            let _finish = cx.on_drop(&this, {
 909                let extension_id = extension_id.clone();
 910                move |this, cx| {
 911                    this.outstanding_operations.remove(extension_id.as_ref());
 912                    cx.notify();
 913                }
 914            });
 915
 916            cx.background_spawn({
 917                let extension_source_path = extension_source_path.clone();
 918                async move {
 919                    builder
 920                        .compile_extension(
 921                            &extension_source_path,
 922                            &mut extension_manifest,
 923                            CompileExtensionOptions { release: false },
 924                        )
 925                        .await
 926                }
 927            })
 928            .await
 929            .inspect_err(|error| {
 930                util::log_err(error);
 931            })?;
 932
 933            let output_path = &extensions_dir.join(extension_id.as_ref());
 934            if let Some(metadata) = fs.metadata(output_path).await? {
 935                if metadata.is_symlink {
 936                    fs.remove_file(
 937                        output_path,
 938                        RemoveOptions {
 939                            recursive: false,
 940                            ignore_if_not_exists: true,
 941                        },
 942                    )
 943                    .await?;
 944                } else {
 945                    bail!("extension {extension_id} is already installed");
 946                }
 947            }
 948
 949            fs.create_symlink(output_path, extension_source_path)
 950                .await?;
 951
 952            this.update(cx, |this, cx| this.reload(None, cx))?.await;
 953            this.update(cx, |this, cx| {
 954                cx.emit(Event::ExtensionInstalled(extension_id.clone()));
 955                if let Some(events) = ExtensionEvents::try_global(cx) {
 956                    if let Some(manifest) = this.extension_manifest_for_id(&extension_id) {
 957                        events.update(cx, |this, cx| {
 958                            this.emit(extension::Event::ExtensionInstalled(manifest.clone()), cx)
 959                        });
 960                    }
 961                }
 962            })?;
 963
 964            Ok(())
 965        })
 966    }
 967
 968    pub fn rebuild_dev_extension(&mut self, extension_id: Arc<str>, cx: &mut Context<Self>) {
 969        let path = self.installed_dir.join(extension_id.as_ref());
 970        let builder = self.builder.clone();
 971        let fs = self.fs.clone();
 972
 973        match self.outstanding_operations.entry(extension_id.clone()) {
 974            btree_map::Entry::Occupied(_) => return,
 975            btree_map::Entry::Vacant(e) => e.insert(ExtensionOperation::Upgrade),
 976        };
 977
 978        cx.notify();
 979        let compile = cx.background_spawn(async move {
 980            let mut manifest = ExtensionManifest::load(fs, &path).await?;
 981            builder
 982                .compile_extension(
 983                    &path,
 984                    &mut manifest,
 985                    CompileExtensionOptions { release: true },
 986                )
 987                .await
 988        });
 989
 990        cx.spawn(async move |this, cx| {
 991            let result = compile.await;
 992
 993            this.update(cx, |this, cx| {
 994                this.outstanding_operations.remove(&extension_id);
 995                cx.notify();
 996            })?;
 997
 998            if result.is_ok() {
 999                this.update(cx, |this, cx| this.reload(Some(extension_id), cx))?
1000                    .await;
1001            }
1002
1003            result
1004        })
1005        .detach_and_log_err(cx)
1006    }
1007
1008    /// Updates the set of installed extensions.
1009    ///
1010    /// First, this unloads any themes, languages, or grammars that are
1011    /// no longer in the manifest, or whose files have changed on disk.
1012    /// Then it loads any themes, languages, or grammars that are newly
1013    /// added to the manifest, or whose files have changed on disk.
1014    fn extensions_updated(
1015        &mut self,
1016        mut new_index: ExtensionIndex,
1017        cx: &mut Context<Self>,
1018    ) -> Task<()> {
1019        let old_index = &self.extension_index;
1020
1021        // Determine which extensions need to be loaded and unloaded, based
1022        // on the changes to the manifest and the extensions that we know have been
1023        // modified.
1024        let mut extensions_to_unload = Vec::default();
1025        let mut extensions_to_load = Vec::default();
1026        {
1027            let mut old_keys = old_index.extensions.iter().peekable();
1028            let mut new_keys = new_index.extensions.iter().peekable();
1029            loop {
1030                match (old_keys.peek(), new_keys.peek()) {
1031                    (None, None) => break,
1032                    (None, Some(_)) => {
1033                        extensions_to_load.push(new_keys.next().unwrap().0.clone());
1034                    }
1035                    (Some(_), None) => {
1036                        extensions_to_unload.push(old_keys.next().unwrap().0.clone());
1037                    }
1038                    (Some((old_key, _)), Some((new_key, _))) => match old_key.cmp(new_key) {
1039                        Ordering::Equal => {
1040                            let (old_key, old_value) = old_keys.next().unwrap();
1041                            let (new_key, new_value) = new_keys.next().unwrap();
1042                            if old_value != new_value || self.modified_extensions.contains(old_key)
1043                            {
1044                                extensions_to_unload.push(old_key.clone());
1045                                extensions_to_load.push(new_key.clone());
1046                            }
1047                        }
1048                        Ordering::Less => {
1049                            extensions_to_unload.push(old_keys.next().unwrap().0.clone());
1050                        }
1051                        Ordering::Greater => {
1052                            extensions_to_load.push(new_keys.next().unwrap().0.clone());
1053                        }
1054                    },
1055                }
1056            }
1057            self.modified_extensions.clear();
1058        }
1059
1060        if extensions_to_load.is_empty() && extensions_to_unload.is_empty() {
1061            return Task::ready(());
1062        }
1063
1064        let reload_count = extensions_to_unload
1065            .iter()
1066            .filter(|id| extensions_to_load.contains(id))
1067            .count();
1068
1069        log::info!(
1070            "extensions updated. loading {}, reloading {}, unloading {}",
1071            extensions_to_load.len() - reload_count,
1072            reload_count,
1073            extensions_to_unload.len() - reload_count
1074        );
1075
1076        for extension_id in &extensions_to_load {
1077            if let Some(extension) = new_index.extensions.get(extension_id) {
1078                telemetry::event!(
1079                    "Extension Loaded",
1080                    extension_id,
1081                    version = extension.manifest.version
1082                );
1083            }
1084        }
1085
1086        let themes_to_remove = old_index
1087            .themes
1088            .iter()
1089            .filter_map(|(name, entry)| {
1090                if extensions_to_unload.contains(&entry.extension) {
1091                    Some(name.clone().into())
1092                } else {
1093                    None
1094                }
1095            })
1096            .collect::<Vec<_>>();
1097        let icon_themes_to_remove = old_index
1098            .icon_themes
1099            .iter()
1100            .filter_map(|(name, entry)| {
1101                if extensions_to_unload.contains(&entry.extension) {
1102                    Some(name.clone().into())
1103                } else {
1104                    None
1105                }
1106            })
1107            .collect::<Vec<_>>();
1108        let languages_to_remove = old_index
1109            .languages
1110            .iter()
1111            .filter_map(|(name, entry)| {
1112                if extensions_to_unload.contains(&entry.extension) {
1113                    Some(name.clone())
1114                } else {
1115                    None
1116                }
1117            })
1118            .collect::<Vec<_>>();
1119        let mut grammars_to_remove = Vec::new();
1120        for extension_id in &extensions_to_unload {
1121            let Some(extension) = old_index.extensions.get(extension_id) else {
1122                continue;
1123            };
1124            grammars_to_remove.extend(extension.manifest.grammars.keys().cloned());
1125            for (language_server_name, config) in extension.manifest.language_servers.iter() {
1126                for language in config.languages() {
1127                    self.proxy
1128                        .remove_language_server(&language, language_server_name);
1129                }
1130            }
1131
1132            for (server_id, _) in extension.manifest.context_servers.iter() {
1133                self.proxy.unregister_context_server(server_id.clone(), cx);
1134            }
1135        }
1136
1137        self.wasm_extensions
1138            .retain(|(extension, _)| !extensions_to_unload.contains(&extension.id));
1139        self.proxy.remove_user_themes(themes_to_remove);
1140        self.proxy.remove_icon_themes(icon_themes_to_remove);
1141        self.proxy
1142            .remove_languages(&languages_to_remove, &grammars_to_remove);
1143
1144        let mut grammars_to_add = Vec::new();
1145        let mut themes_to_add = Vec::new();
1146        let mut icon_themes_to_add = Vec::new();
1147        let mut snippets_to_add = Vec::new();
1148        for extension_id in &extensions_to_load {
1149            let Some(extension) = new_index.extensions.get(extension_id) else {
1150                continue;
1151            };
1152
1153            grammars_to_add.extend(extension.manifest.grammars.keys().map(|grammar_name| {
1154                let mut grammar_path = self.installed_dir.clone();
1155                grammar_path.extend([extension_id.as_ref(), "grammars"]);
1156                grammar_path.push(grammar_name.as_ref());
1157                grammar_path.set_extension("wasm");
1158                (grammar_name.clone(), grammar_path)
1159            }));
1160            themes_to_add.extend(extension.manifest.themes.iter().map(|theme_path| {
1161                let mut path = self.installed_dir.clone();
1162                path.extend([Path::new(extension_id.as_ref()), theme_path.as_path()]);
1163                path
1164            }));
1165            icon_themes_to_add.extend(extension.manifest.icon_themes.iter().map(
1166                |icon_theme_path| {
1167                    let mut path = self.installed_dir.clone();
1168                    path.extend([Path::new(extension_id.as_ref()), icon_theme_path.as_path()]);
1169
1170                    let mut icons_root_path = self.installed_dir.clone();
1171                    icons_root_path.extend([Path::new(extension_id.as_ref())]);
1172
1173                    (path, icons_root_path)
1174                },
1175            ));
1176            snippets_to_add.extend(extension.manifest.snippets.iter().map(|snippets_path| {
1177                let mut path = self.installed_dir.clone();
1178                path.extend([Path::new(extension_id.as_ref()), snippets_path.as_path()]);
1179                path
1180            }));
1181        }
1182
1183        self.proxy.register_grammars(grammars_to_add);
1184
1185        let installed_dir = self.installed_dir.clone();
1186
1187        let fs = self.fs.clone();
1188        let wasm_host = self.wasm_host.clone();
1189        let root_dir = self.installed_dir.clone();
1190        let proxy = self.proxy.clone();
1191        let extension_entries = extensions_to_load
1192            .iter()
1193            .filter_map(|name| new_index.extensions.get(name).cloned())
1194            .collect::<Vec<_>>();
1195
1196        cx.spawn(async move |this, cx| {
1197            let languages_to_add = new_index
1198                .languages
1199                .iter_mut()
1200                .filter(|(_, entry)| extensions_to_load.contains(&entry.extension))
1201                .collect::<Vec<_>>();
1202            for (_, language) in languages_to_add {
1203                let mut language_path = installed_dir.clone();
1204                language_path.extend([
1205                    Path::new(language.extension.as_ref()),
1206                    language.path.as_path(),
1207                ]);
1208                let Some(config) = fs.load(&language_path.join("config.toml")).await.ok() else {
1209                    log::error!("Could not load config.toml in {:?}", language_path);
1210                    continue;
1211                };
1212                let Some(config) = ::toml::from_str::<LanguageConfig>(&config).ok() else {
1213                    log::error!(
1214                        "Could not parse language config.toml in {:?}",
1215                        language_path
1216                    );
1217                    continue;
1218                };
1219                language.config = config.clone();
1220                proxy.register_language(
1221                    language.config.clone(),
1222                    Arc::new(move || {
1223                        let queries = load_plugin_queries(&language_path);
1224                        let context_provider =
1225                            std::fs::read_to_string(language_path.join("tasks.json"))
1226                                .ok()
1227                                .and_then(|contents| {
1228                                    let definitions =
1229                                        serde_json_lenient::from_str(&contents).log_err()?;
1230                                    Some(Arc::new(ContextProviderWithTasks::new(definitions))
1231                                        as Arc<_>)
1232                                });
1233
1234                        Ok(LoadedLanguage {
1235                            config: config.clone(),
1236                            queries,
1237                            context_provider,
1238                            toolchain_provider: None,
1239                        })
1240                    }),
1241                );
1242            }
1243            this.update(cx, |this, cx| {
1244                this.extension_index = new_index;
1245                cx.notify();
1246                cx.emit(Event::ExtensionsUpdated);
1247            })
1248            .ok();
1249            cx.background_spawn({
1250                let fs = fs.clone();
1251                async move {
1252                    for theme_path in themes_to_add.into_iter() {
1253                        proxy
1254                            .load_user_theme(theme_path, fs.clone())
1255                            .await
1256                            .log_err();
1257                    }
1258
1259                    for (icon_theme_path, icons_root_path) in icon_themes_to_add.into_iter() {
1260                        proxy
1261                            .load_icon_theme(icon_theme_path, icons_root_path, fs.clone())
1262                            .await
1263                            .log_err();
1264                    }
1265
1266                    for snippets_path in &snippets_to_add {
1267                        if let Some(snippets_contents) = fs.load(snippets_path).await.log_err() {
1268                            proxy
1269                                .register_snippet(snippets_path, &snippets_contents)
1270                                .log_err();
1271                        }
1272                    }
1273                }
1274            })
1275            .await;
1276
1277            let mut wasm_extensions = Vec::new();
1278            for extension in extension_entries {
1279                if extension.manifest.lib.kind.is_none() {
1280                    continue;
1281                };
1282
1283                let extension_path = root_dir.join(extension.manifest.id.as_ref());
1284                let wasm_extension = WasmExtension::load(
1285                    extension_path,
1286                    &extension.manifest,
1287                    wasm_host.clone(),
1288                    &cx,
1289                )
1290                .await;
1291
1292                if let Some(wasm_extension) = wasm_extension.log_err() {
1293                    wasm_extensions.push((extension.manifest.clone(), wasm_extension));
1294                } else {
1295                    this.update(cx, |_, cx| {
1296                        cx.emit(Event::ExtensionFailedToLoad(extension.manifest.id.clone()))
1297                    })
1298                    .ok();
1299                }
1300            }
1301
1302            this.update(cx, |this, cx| {
1303                this.reload_complete_senders.clear();
1304
1305                for (manifest, wasm_extension) in &wasm_extensions {
1306                    let extension = Arc::new(wasm_extension.clone());
1307
1308                    for (language_server_id, language_server_config) in &manifest.language_servers {
1309                        for language in language_server_config.languages() {
1310                            this.proxy.register_language_server(
1311                                extension.clone(),
1312                                language_server_id.clone(),
1313                                language.clone(),
1314                            );
1315                        }
1316                    }
1317
1318                    for (slash_command_name, slash_command) in &manifest.slash_commands {
1319                        this.proxy.register_slash_command(
1320                            extension.clone(),
1321                            extension::SlashCommand {
1322                                name: slash_command_name.to_string(),
1323                                description: slash_command.description.to_string(),
1324                                // We don't currently expose this as a configurable option, as it currently drives
1325                                // the `menu_text` on the `SlashCommand` trait, which is not used for slash commands
1326                                // defined in extensions, as they are not able to be added to the menu.
1327                                tooltip_text: String::new(),
1328                                requires_argument: slash_command.requires_argument,
1329                            },
1330                        );
1331                    }
1332
1333                    for (id, _context_server_entry) in &manifest.context_servers {
1334                        this.proxy
1335                            .register_context_server(extension.clone(), id.clone(), cx);
1336                    }
1337
1338                    for (provider_id, _provider) in &manifest.indexed_docs_providers {
1339                        this.proxy
1340                            .register_indexed_docs_provider(extension.clone(), provider_id.clone());
1341                    }
1342                }
1343
1344                this.wasm_extensions.extend(wasm_extensions);
1345                this.proxy.set_extensions_loaded();
1346                this.proxy.reload_current_theme(cx);
1347                this.proxy.reload_current_icon_theme(cx);
1348
1349                if let Some(events) = ExtensionEvents::try_global(cx) {
1350                    events.update(cx, |this, cx| {
1351                        this.emit(extension::Event::ExtensionsInstalledChanged, cx)
1352                    });
1353                }
1354            })
1355            .ok();
1356        })
1357    }
1358
1359    fn rebuild_extension_index(&self, cx: &mut Context<Self>) -> Task<ExtensionIndex> {
1360        let fs = self.fs.clone();
1361        let work_dir = self.wasm_host.work_dir.clone();
1362        let extensions_dir = self.installed_dir.clone();
1363        let index_path = self.index_path.clone();
1364        let proxy = self.proxy.clone();
1365        cx.background_spawn(async move {
1366            let start_time = Instant::now();
1367            let mut index = ExtensionIndex::default();
1368
1369            fs.create_dir(&work_dir).await.log_err();
1370            fs.create_dir(&extensions_dir).await.log_err();
1371
1372            let extension_paths = fs.read_dir(&extensions_dir).await;
1373            if let Ok(mut extension_paths) = extension_paths {
1374                while let Some(extension_dir) = extension_paths.next().await {
1375                    let Ok(extension_dir) = extension_dir else {
1376                        continue;
1377                    };
1378
1379                    if extension_dir
1380                        .file_name()
1381                        .map_or(false, |file_name| file_name == ".DS_Store")
1382                    {
1383                        continue;
1384                    }
1385
1386                    Self::add_extension_to_index(
1387                        fs.clone(),
1388                        extension_dir,
1389                        &mut index,
1390                        proxy.clone(),
1391                    )
1392                    .await
1393                    .log_err();
1394                }
1395            }
1396
1397            if let Ok(index_json) = serde_json::to_string_pretty(&index) {
1398                fs.save(&index_path, &index_json.as_str().into(), Default::default())
1399                    .await
1400                    .context("failed to save extension index")
1401                    .log_err();
1402            }
1403
1404            log::info!("rebuilt extension index in {:?}", start_time.elapsed());
1405            index
1406        })
1407    }
1408
1409    async fn add_extension_to_index(
1410        fs: Arc<dyn Fs>,
1411        extension_dir: PathBuf,
1412        index: &mut ExtensionIndex,
1413        proxy: Arc<ExtensionHostProxy>,
1414    ) -> Result<()> {
1415        let mut extension_manifest = ExtensionManifest::load(fs.clone(), &extension_dir).await?;
1416        let extension_id = extension_manifest.id.clone();
1417
1418        // TODO: distinguish dev extensions more explicitly, by the absence
1419        // of a checksum file that we'll create when downloading normal extensions.
1420        let is_dev = fs
1421            .metadata(&extension_dir)
1422            .await?
1423            .ok_or_else(|| anyhow!("directory does not exist"))?
1424            .is_symlink;
1425
1426        if let Ok(mut language_paths) = fs.read_dir(&extension_dir.join("languages")).await {
1427            while let Some(language_path) = language_paths.next().await {
1428                let language_path = language_path?;
1429                let Ok(relative_path) = language_path.strip_prefix(&extension_dir) else {
1430                    continue;
1431                };
1432                let Ok(Some(fs_metadata)) = fs.metadata(&language_path).await else {
1433                    continue;
1434                };
1435                if !fs_metadata.is_dir {
1436                    continue;
1437                }
1438                let config = fs.load(&language_path.join("config.toml")).await?;
1439                let config = ::toml::from_str::<LanguageConfig>(&config)?;
1440
1441                let relative_path = relative_path.to_path_buf();
1442                if !extension_manifest.languages.contains(&relative_path) {
1443                    extension_manifest.languages.push(relative_path.clone());
1444                }
1445
1446                index.languages.insert(
1447                    config.name.clone(),
1448                    ExtensionIndexLanguageEntry {
1449                        extension: extension_id.clone(),
1450                        path: relative_path,
1451                        config,
1452                    },
1453                );
1454            }
1455        }
1456
1457        if let Ok(mut theme_paths) = fs.read_dir(&extension_dir.join("themes")).await {
1458            while let Some(theme_path) = theme_paths.next().await {
1459                let theme_path = theme_path?;
1460                let Ok(relative_path) = theme_path.strip_prefix(&extension_dir) else {
1461                    continue;
1462                };
1463
1464                let Some(theme_families) = proxy
1465                    .list_theme_names(theme_path.clone(), fs.clone())
1466                    .await
1467                    .log_err()
1468                else {
1469                    continue;
1470                };
1471
1472                let relative_path = relative_path.to_path_buf();
1473                if !extension_manifest.themes.contains(&relative_path) {
1474                    extension_manifest.themes.push(relative_path.clone());
1475                }
1476
1477                for theme_name in theme_families {
1478                    index.themes.insert(
1479                        theme_name.into(),
1480                        ExtensionIndexThemeEntry {
1481                            extension: extension_id.clone(),
1482                            path: relative_path.clone(),
1483                        },
1484                    );
1485                }
1486            }
1487        }
1488
1489        if let Ok(mut icon_theme_paths) = fs.read_dir(&extension_dir.join("icon_themes")).await {
1490            while let Some(icon_theme_path) = icon_theme_paths.next().await {
1491                let icon_theme_path = icon_theme_path?;
1492                let Ok(relative_path) = icon_theme_path.strip_prefix(&extension_dir) else {
1493                    continue;
1494                };
1495
1496                let Some(icon_theme_families) = proxy
1497                    .list_icon_theme_names(icon_theme_path.clone(), fs.clone())
1498                    .await
1499                    .log_err()
1500                else {
1501                    continue;
1502                };
1503
1504                let relative_path = relative_path.to_path_buf();
1505                if !extension_manifest.icon_themes.contains(&relative_path) {
1506                    extension_manifest.icon_themes.push(relative_path.clone());
1507                }
1508
1509                for icon_theme_name in icon_theme_families {
1510                    index.icon_themes.insert(
1511                        icon_theme_name.into(),
1512                        ExtensionIndexIconThemeEntry {
1513                            extension: extension_id.clone(),
1514                            path: relative_path.clone(),
1515                        },
1516                    );
1517                }
1518            }
1519        }
1520
1521        let extension_wasm_path = extension_dir.join("extension.wasm");
1522        if fs.is_file(&extension_wasm_path).await {
1523            extension_manifest
1524                .lib
1525                .kind
1526                .get_or_insert(ExtensionLibraryKind::Rust);
1527        }
1528
1529        index.extensions.insert(
1530            extension_id.clone(),
1531            ExtensionIndexEntry {
1532                dev: is_dev,
1533                manifest: Arc::new(extension_manifest),
1534            },
1535        );
1536
1537        Ok(())
1538    }
1539
1540    fn prepare_remote_extension(
1541        &mut self,
1542        extension_id: Arc<str>,
1543        is_dev: bool,
1544        tmp_dir: PathBuf,
1545        cx: &mut Context<Self>,
1546    ) -> Task<Result<()>> {
1547        let src_dir = self.extensions_dir().join(extension_id.as_ref());
1548        let Some(loaded_extension) = self.extension_index.extensions.get(&extension_id).cloned()
1549        else {
1550            return Task::ready(Err(anyhow!("extension no longer installed")));
1551        };
1552        let fs = self.fs.clone();
1553        cx.background_spawn(async move {
1554            const EXTENSION_TOML: &str = "extension.toml";
1555            const EXTENSION_WASM: &str = "extension.wasm";
1556            const CONFIG_TOML: &str = "config.toml";
1557
1558            if is_dev {
1559                let manifest_toml = toml::to_string(&loaded_extension.manifest)?;
1560                fs.save(
1561                    &tmp_dir.join(EXTENSION_TOML),
1562                    &Rope::from(manifest_toml),
1563                    language::LineEnding::Unix,
1564                )
1565                .await?;
1566            } else {
1567                fs.copy_file(
1568                    &src_dir.join(EXTENSION_TOML),
1569                    &tmp_dir.join(EXTENSION_TOML),
1570                    fs::CopyOptions::default(),
1571                )
1572                .await?
1573            }
1574
1575            if fs.is_file(&src_dir.join(EXTENSION_WASM)).await {
1576                fs.copy_file(
1577                    &src_dir.join(EXTENSION_WASM),
1578                    &tmp_dir.join(EXTENSION_WASM),
1579                    fs::CopyOptions::default(),
1580                )
1581                .await?
1582            }
1583
1584            for language_path in loaded_extension.manifest.languages.iter() {
1585                if fs
1586                    .is_file(&src_dir.join(language_path).join(CONFIG_TOML))
1587                    .await
1588                {
1589                    fs.create_dir(&tmp_dir.join(language_path)).await?;
1590                    fs.copy_file(
1591                        &src_dir.join(language_path).join(CONFIG_TOML),
1592                        &tmp_dir.join(language_path).join(CONFIG_TOML),
1593                        fs::CopyOptions::default(),
1594                    )
1595                    .await?
1596                }
1597            }
1598
1599            Ok(())
1600        })
1601    }
1602
1603    async fn sync_extensions_over_ssh(
1604        this: &WeakEntity<Self>,
1605        client: WeakEntity<SshRemoteClient>,
1606        cx: &mut AsyncApp,
1607    ) -> Result<()> {
1608        let extensions = this.update(cx, |this, _cx| {
1609            this.extension_index
1610                .extensions
1611                .iter()
1612                .filter_map(|(id, entry)| {
1613                    if entry.manifest.language_servers.is_empty() {
1614                        return None;
1615                    }
1616                    Some(proto::Extension {
1617                        id: id.to_string(),
1618                        version: entry.manifest.version.to_string(),
1619                        dev: entry.dev,
1620                    })
1621                })
1622                .collect()
1623        })?;
1624
1625        let response = client
1626            .update(cx, |client, _cx| {
1627                client
1628                    .proto_client()
1629                    .request(proto::SyncExtensions { extensions })
1630            })?
1631            .await?;
1632
1633        for missing_extension in response.missing_extensions.into_iter() {
1634            let tmp_dir = tempfile::tempdir()?;
1635            this.update(cx, |this, cx| {
1636                this.prepare_remote_extension(
1637                    missing_extension.id.clone().into(),
1638                    missing_extension.dev,
1639                    tmp_dir.path().to_owned(),
1640                    cx,
1641                )
1642            })?
1643            .await?;
1644            let dest_dir = PathBuf::from(&response.tmp_dir).join(missing_extension.clone().id);
1645            log::info!("Uploading extension {}", missing_extension.clone().id);
1646
1647            client
1648                .update(cx, |client, cx| {
1649                    client.upload_directory(tmp_dir.path().to_owned(), dest_dir.clone(), cx)
1650                })?
1651                .await?;
1652
1653            log::info!(
1654                "Finished uploading extension {}",
1655                missing_extension.clone().id
1656            );
1657
1658            client
1659                .update(cx, |client, _cx| {
1660                    client.proto_client().request(proto::InstallExtension {
1661                        tmp_dir: dest_dir.to_string_lossy().to_string(),
1662                        extension: Some(missing_extension),
1663                    })
1664                })?
1665                .await?;
1666        }
1667
1668        anyhow::Ok(())
1669    }
1670
1671    pub async fn update_ssh_clients(this: &WeakEntity<Self>, cx: &mut AsyncApp) -> Result<()> {
1672        let clients = this.update(cx, |this, _cx| {
1673            this.ssh_clients.retain(|_k, v| v.upgrade().is_some());
1674            this.ssh_clients.values().cloned().collect::<Vec<_>>()
1675        })?;
1676
1677        for client in clients {
1678            Self::sync_extensions_over_ssh(&this, client, cx)
1679                .await
1680                .log_err();
1681        }
1682
1683        anyhow::Ok(())
1684    }
1685
1686    pub fn register_ssh_client(&mut self, client: Entity<SshRemoteClient>, cx: &mut Context<Self>) {
1687        let connection_options = client.read(cx).connection_options();
1688        if self.ssh_clients.contains_key(&connection_options.ssh_url()) {
1689            return;
1690        }
1691
1692        self.ssh_clients
1693            .insert(connection_options.ssh_url(), client.downgrade());
1694        self.ssh_registered_tx.unbounded_send(()).ok();
1695    }
1696}
1697
1698fn load_plugin_queries(root_path: &Path) -> LanguageQueries {
1699    let mut result = LanguageQueries::default();
1700    if let Some(entries) = std::fs::read_dir(root_path).log_err() {
1701        for entry in entries {
1702            let Some(entry) = entry.log_err() else {
1703                continue;
1704            };
1705            let path = entry.path();
1706            if let Some(remainder) = path.strip_prefix(root_path).ok().and_then(|p| p.to_str()) {
1707                if !remainder.ends_with(".scm") {
1708                    continue;
1709                }
1710                for (name, query) in QUERY_FILENAME_PREFIXES {
1711                    if remainder.starts_with(name) {
1712                        if let Some(contents) = std::fs::read_to_string(&path).log_err() {
1713                            match query(&mut result) {
1714                                None => *query(&mut result) = Some(contents.into()),
1715                                Some(r) => r.to_mut().push_str(contents.as_ref()),
1716                            }
1717                        }
1718                        break;
1719                    }
1720                }
1721            }
1722        }
1723    }
1724    result
1725}