1use crate::{
2 language_settings::{
3 all_language_settings, AllLanguageSettingsContent, LanguageSettingsContent,
4 },
5 task_context::ContextProvider,
6 CachedLspAdapter, File, Language, LanguageConfig, LanguageId, LanguageMatcher,
7 LanguageServerName, LspAdapter, LspAdapterDelegate, PARSER, PLAIN_TEXT,
8};
9use anyhow::{anyhow, Context as _, Result};
10use collections::{hash_map, HashMap};
11use futures::TryFutureExt;
12use futures::{
13 channel::{mpsc, oneshot},
14 future::Shared,
15 Future, FutureExt as _,
16};
17use gpui::{AppContext, BackgroundExecutor, Task};
18use lsp::LanguageServerId;
19use parking_lot::{Mutex, RwLock};
20use postage::watch;
21use std::{
22 borrow::Cow,
23 ffi::OsStr,
24 ops::Not,
25 path::{Path, PathBuf},
26 sync::Arc,
27};
28use sum_tree::Bias;
29use text::{Point, Rope};
30use theme::Theme;
31use unicase::UniCase;
32use util::{maybe, paths::PathExt, post_inc, ResultExt};
33
34pub struct LanguageRegistry {
35 state: RwLock<LanguageRegistryState>,
36 language_server_download_dir: Option<Arc<Path>>,
37 login_shell_env_loaded: Shared<Task<()>>,
38 executor: BackgroundExecutor,
39 lsp_binary_status_tx: LspBinaryStatusSender,
40}
41
42struct LanguageRegistryState {
43 next_language_server_id: usize,
44 languages: Vec<Arc<Language>>,
45 language_settings: AllLanguageSettingsContent,
46 available_languages: Vec<AvailableLanguage>,
47 grammars: HashMap<Arc<str>, AvailableGrammar>,
48 lsp_adapters: HashMap<Arc<str>, Vec<Arc<CachedLspAdapter>>>,
49 loading_languages: HashMap<LanguageId, Vec<oneshot::Sender<Result<Arc<Language>>>>>,
50 subscription: (watch::Sender<()>, watch::Receiver<()>),
51 theme: Option<Arc<Theme>>,
52 version: usize,
53 reload_count: usize,
54
55 #[cfg(any(test, feature = "test-support"))]
56 fake_server_txs:
57 HashMap<Arc<str>, Vec<futures::channel::mpsc::UnboundedSender<lsp::FakeLanguageServer>>>,
58}
59
60#[derive(Clone, Debug, PartialEq, Eq)]
61pub enum LanguageServerBinaryStatus {
62 None,
63 CheckingForUpdate,
64 Downloading,
65 Failed { error: String },
66}
67
68pub struct PendingLanguageServer {
69 pub server_id: LanguageServerId,
70 pub task: Task<Result<(lsp::LanguageServer, Option<serde_json::Value>)>>,
71 pub container_dir: Option<Arc<Path>>,
72}
73
74#[derive(Clone)]
75struct AvailableLanguage {
76 id: LanguageId,
77 name: Arc<str>,
78 grammar: Option<Arc<str>>,
79 matcher: LanguageMatcher,
80 load: Arc<
81 dyn Fn() -> Result<(
82 LanguageConfig,
83 LanguageQueries,
84 Option<Arc<dyn ContextProvider>>,
85 )>
86 + 'static
87 + Send
88 + Sync,
89 >,
90 loaded: bool,
91}
92
93enum AvailableGrammar {
94 Native(tree_sitter::Language),
95 Loaded(#[allow(unused)] PathBuf, tree_sitter::Language),
96 Loading(
97 #[allow(unused)] PathBuf,
98 Vec<oneshot::Sender<Result<tree_sitter::Language, Arc<anyhow::Error>>>>,
99 ),
100 Unloaded(PathBuf),
101 LoadFailed(Arc<anyhow::Error>),
102}
103
104#[derive(Debug)]
105pub struct LanguageNotFound;
106
107impl std::fmt::Display for LanguageNotFound {
108 fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
109 write!(f, "language not found")
110 }
111}
112
113pub const QUERY_FILENAME_PREFIXES: &[(
114 &str,
115 fn(&mut LanguageQueries) -> &mut Option<Cow<'static, str>>,
116)] = &[
117 ("highlights", |q| &mut q.highlights),
118 ("brackets", |q| &mut q.brackets),
119 ("outline", |q| &mut q.outline),
120 ("indents", |q| &mut q.indents),
121 ("embedding", |q| &mut q.embedding),
122 ("injections", |q| &mut q.injections),
123 ("overrides", |q| &mut q.overrides),
124 ("redactions", |q| &mut q.redactions),
125];
126
127/// Tree-sitter language queries for a given language.
128#[derive(Debug, Default)]
129pub struct LanguageQueries {
130 pub highlights: Option<Cow<'static, str>>,
131 pub brackets: Option<Cow<'static, str>>,
132 pub indents: Option<Cow<'static, str>>,
133 pub outline: Option<Cow<'static, str>>,
134 pub embedding: Option<Cow<'static, str>>,
135 pub injections: Option<Cow<'static, str>>,
136 pub overrides: Option<Cow<'static, str>>,
137 pub redactions: Option<Cow<'static, str>>,
138}
139
140#[derive(Clone, Default)]
141struct LspBinaryStatusSender {
142 txs: Arc<Mutex<Vec<mpsc::UnboundedSender<(LanguageServerName, LanguageServerBinaryStatus)>>>>,
143}
144
145impl LanguageRegistry {
146 pub fn new(login_shell_env_loaded: Task<()>, executor: BackgroundExecutor) -> Self {
147 let this = Self {
148 state: RwLock::new(LanguageRegistryState {
149 next_language_server_id: 0,
150 languages: Vec::new(),
151 available_languages: Vec::new(),
152 grammars: Default::default(),
153 language_settings: Default::default(),
154 loading_languages: Default::default(),
155 lsp_adapters: Default::default(),
156 subscription: watch::channel(),
157 theme: Default::default(),
158 version: 0,
159 reload_count: 0,
160
161 #[cfg(any(test, feature = "test-support"))]
162 fake_server_txs: Default::default(),
163 }),
164 language_server_download_dir: None,
165 login_shell_env_loaded: login_shell_env_loaded.shared(),
166 lsp_binary_status_tx: Default::default(),
167 executor,
168 };
169 this.add(PLAIN_TEXT.clone());
170 this
171 }
172
173 #[cfg(any(test, feature = "test-support"))]
174 pub fn test(executor: BackgroundExecutor) -> Self {
175 let mut this = Self::new(Task::ready(()), executor);
176 this.language_server_download_dir = Some(Path::new("/the-download-dir").into());
177 this
178 }
179
180 /// Clears out all of the loaded languages and reload them from scratch.
181 pub fn reload(&self) {
182 self.state.write().reload();
183 }
184
185 /// Removes the specified languages and grammars from the registry.
186 pub fn remove_languages(
187 &self,
188 languages_to_remove: &[Arc<str>],
189 grammars_to_remove: &[Arc<str>],
190 ) {
191 self.state
192 .write()
193 .remove_languages(languages_to_remove, grammars_to_remove)
194 }
195
196 pub fn remove_lsp_adapter(&self, language_name: &str, name: &LanguageServerName) {
197 let mut state = self.state.write();
198 if let Some(adapters) = state.lsp_adapters.get_mut(language_name) {
199 adapters.retain(|adapter| &adapter.name != name)
200 }
201 state.version += 1;
202 state.reload_count += 1;
203 *state.subscription.0.borrow_mut() = ();
204 }
205
206 #[cfg(any(feature = "test-support", test))]
207 pub fn register_test_language(&self, config: LanguageConfig) {
208 self.register_language(
209 config.name.clone(),
210 config.grammar.clone(),
211 config.matcher.clone(),
212 move || Ok((config.clone(), Default::default(), None)),
213 )
214 }
215
216 pub fn register_lsp_adapter(&self, language_name: Arc<str>, adapter: Arc<dyn LspAdapter>) {
217 self.state
218 .write()
219 .lsp_adapters
220 .entry(language_name)
221 .or_default()
222 .push(CachedLspAdapter::new(adapter, true));
223 }
224
225 pub fn register_secondary_lsp_adapter(
226 &self,
227 language_name: Arc<str>,
228 adapter: Arc<dyn LspAdapter>,
229 ) {
230 self.state
231 .write()
232 .lsp_adapters
233 .entry(language_name)
234 .or_default()
235 .push(CachedLspAdapter::new(adapter, false));
236 }
237
238 #[cfg(any(feature = "test-support", test))]
239 pub fn register_fake_lsp_adapter(
240 &self,
241 language_name: &str,
242 adapter: crate::FakeLspAdapter,
243 ) -> futures::channel::mpsc::UnboundedReceiver<lsp::FakeLanguageServer> {
244 self.register_specific_fake_lsp_adapter(language_name, true, adapter)
245 }
246
247 #[cfg(any(feature = "test-support", test))]
248 pub fn register_specific_fake_lsp_adapter(
249 &self,
250 language_name: &str,
251 primary: bool,
252 adapter: crate::FakeLspAdapter,
253 ) -> futures::channel::mpsc::UnboundedReceiver<lsp::FakeLanguageServer> {
254 self.state
255 .write()
256 .lsp_adapters
257 .entry(language_name.into())
258 .or_default()
259 .push(CachedLspAdapter::new(Arc::new(adapter), primary));
260 self.fake_language_servers(language_name)
261 }
262
263 #[cfg(any(feature = "test-support", test))]
264 pub fn fake_language_servers(
265 &self,
266 language_name: &str,
267 ) -> futures::channel::mpsc::UnboundedReceiver<lsp::FakeLanguageServer> {
268 let (servers_tx, servers_rx) = futures::channel::mpsc::unbounded();
269 self.state
270 .write()
271 .fake_server_txs
272 .entry(language_name.into())
273 .or_default()
274 .push(servers_tx);
275 servers_rx
276 }
277
278 /// Adds a language to the registry, which can be loaded if needed.
279 pub fn register_language(
280 &self,
281 name: Arc<str>,
282 grammar_name: Option<Arc<str>>,
283 matcher: LanguageMatcher,
284 load: impl Fn() -> Result<(
285 LanguageConfig,
286 LanguageQueries,
287 Option<Arc<dyn ContextProvider>>,
288 )>
289 + 'static
290 + Send
291 + Sync,
292 ) {
293 let load = Arc::new(load);
294 let state = &mut *self.state.write();
295
296 for existing_language in &mut state.available_languages {
297 if existing_language.name == name {
298 existing_language.grammar = grammar_name;
299 existing_language.matcher = matcher;
300 existing_language.load = load;
301 return;
302 }
303 }
304
305 state.available_languages.push(AvailableLanguage {
306 id: LanguageId::new(),
307 name,
308 grammar: grammar_name,
309 matcher,
310 load,
311 loaded: false,
312 });
313 state.version += 1;
314 state.reload_count += 1;
315 *state.subscription.0.borrow_mut() = ();
316 }
317
318 /// Adds grammars to the registry. Language configurations reference a grammar by name. The
319 /// grammar controls how the source code is parsed.
320 pub fn register_native_grammars(
321 &self,
322 grammars: impl IntoIterator<Item = (impl Into<Arc<str>>, tree_sitter::Language)>,
323 ) {
324 self.state.write().grammars.extend(
325 grammars
326 .into_iter()
327 .map(|(name, grammar)| (name.into(), AvailableGrammar::Native(grammar))),
328 );
329 }
330
331 /// Adds paths to WASM grammar files, which can be loaded if needed.
332 pub fn register_wasm_grammars(
333 &self,
334 grammars: impl IntoIterator<Item = (impl Into<Arc<str>>, PathBuf)>,
335 ) {
336 let mut state = self.state.write();
337 state.grammars.extend(
338 grammars
339 .into_iter()
340 .map(|(name, path)| (name.into(), AvailableGrammar::Unloaded(path))),
341 );
342 state.version += 1;
343 state.reload_count += 1;
344 *state.subscription.0.borrow_mut() = ();
345 }
346
347 pub fn language_settings(&self) -> AllLanguageSettingsContent {
348 self.state.read().language_settings.clone()
349 }
350
351 pub fn language_names(&self) -> Vec<String> {
352 let state = self.state.read();
353 let mut result = state
354 .available_languages
355 .iter()
356 .filter_map(|l| l.loaded.not().then_some(l.name.to_string()))
357 .chain(state.languages.iter().map(|l| l.config.name.to_string()))
358 .collect::<Vec<_>>();
359 result.sort_unstable_by_key(|language_name| language_name.to_lowercase());
360 result
361 }
362
363 pub fn grammar_names(&self) -> Vec<Arc<str>> {
364 let state = self.state.read();
365 let mut result = state.grammars.keys().cloned().collect::<Vec<_>>();
366 result.sort_unstable_by_key(|grammar_name| grammar_name.to_lowercase());
367 result
368 }
369
370 /// Add a pre-loaded language to the registry.
371 pub fn add(&self, language: Arc<Language>) {
372 let mut state = self.state.write();
373 state.available_languages.push(AvailableLanguage {
374 id: language.id,
375 name: language.name(),
376 grammar: language.config.grammar.clone(),
377 matcher: language.config.matcher.clone(),
378 load: Arc::new(|| Err(anyhow!("already loaded"))),
379 loaded: true,
380 });
381 state.add(language);
382 }
383
384 pub fn subscribe(&self) -> watch::Receiver<()> {
385 self.state.read().subscription.1.clone()
386 }
387
388 /// Returns the number of times that the registry has been changed,
389 /// by adding languages or reloading.
390 pub fn version(&self) -> usize {
391 self.state.read().version
392 }
393
394 /// Returns the number of times that the registry has been reloaded.
395 pub fn reload_count(&self) -> usize {
396 self.state.read().reload_count
397 }
398
399 pub fn set_theme(&self, theme: Arc<Theme>) {
400 let mut state = self.state.write();
401 state.theme = Some(theme.clone());
402 for language in &state.languages {
403 language.set_theme(theme.syntax());
404 }
405 }
406
407 pub fn set_language_server_download_dir(&mut self, path: impl Into<Arc<Path>>) {
408 self.language_server_download_dir = Some(path.into());
409 }
410
411 pub fn language_for_name(
412 self: &Arc<Self>,
413 name: &str,
414 ) -> impl Future<Output = Result<Arc<Language>>> {
415 let name = UniCase::new(name);
416 let rx = self.get_or_load_language(|language_name, _| {
417 if UniCase::new(language_name) == name {
418 1
419 } else {
420 0
421 }
422 });
423 async move { rx.await? }
424 }
425
426 pub fn language_for_name_or_extension(
427 self: &Arc<Self>,
428 string: &str,
429 ) -> impl Future<Output = Result<Arc<Language>>> {
430 let string = UniCase::new(string);
431 let rx = self.get_or_load_language(|name, config| {
432 if UniCase::new(name) == string
433 || config
434 .path_suffixes
435 .iter()
436 .any(|suffix| UniCase::new(suffix) == string)
437 {
438 1
439 } else {
440 0
441 }
442 });
443 async move { rx.await? }
444 }
445
446 pub fn language_for_file(
447 self: &Arc<Self>,
448 file: &Arc<dyn File>,
449 content: Option<&Rope>,
450 cx: &AppContext,
451 ) -> impl Future<Output = Result<Arc<Language>>> {
452 let user_file_types = all_language_settings(Some(file), cx);
453 self.language_for_file_internal(
454 &file.full_path(cx),
455 content,
456 Some(&user_file_types.file_types),
457 )
458 }
459
460 pub fn language_for_file_path<'a>(
461 self: &Arc<Self>,
462 path: &'a Path,
463 ) -> impl Future<Output = Result<Arc<Language>>> + 'a {
464 self.language_for_file_internal(path, None, None)
465 .map_err(|error| error.context(format!("language for file path {}", path.display())))
466 }
467
468 fn language_for_file_internal(
469 self: &Arc<Self>,
470 path: &Path,
471 content: Option<&Rope>,
472 user_file_types: Option<&HashMap<Arc<str>, Vec<String>>>,
473 ) -> impl Future<Output = Result<Arc<Language>>> {
474 let filename = path.file_name().and_then(|name| name.to_str());
475 let extension = path.extension_or_hidden_file_name();
476 let path_suffixes = [extension, filename];
477 let empty = Vec::new();
478
479 let rx = self.get_or_load_language(move |language_name, config| {
480 let path_matches_default_suffix = config
481 .path_suffixes
482 .iter()
483 .any(|suffix| path_suffixes.contains(&Some(suffix.as_str())));
484 let path_matches_custom_suffix = user_file_types
485 .and_then(|types| types.get(language_name))
486 .unwrap_or(&empty)
487 .iter()
488 .any(|suffix| path_suffixes.contains(&Some(suffix.as_str())));
489 let content_matches = content.zip(config.first_line_pattern.as_ref()).map_or(
490 false,
491 |(content, pattern)| {
492 let end = content.clip_point(Point::new(0, 256), Bias::Left);
493 let end = content.point_to_offset(end);
494 let text = content.chunks_in_range(0..end).collect::<String>();
495 pattern.is_match(&text)
496 },
497 );
498 if path_matches_custom_suffix {
499 2
500 } else if path_matches_default_suffix || content_matches {
501 1
502 } else {
503 0
504 }
505 });
506 async move { rx.await? }
507 }
508
509 fn get_or_load_language(
510 self: &Arc<Self>,
511 callback: impl Fn(&str, &LanguageMatcher) -> usize,
512 ) -> oneshot::Receiver<Result<Arc<Language>>> {
513 let (tx, rx) = oneshot::channel();
514
515 let mut state = self.state.write();
516 let Some((language, _)) = state
517 .available_languages
518 .iter()
519 .filter_map(|language| {
520 let score = callback(&language.name, &language.matcher);
521 if score > 0 {
522 Some((language.clone(), score))
523 } else {
524 None
525 }
526 })
527 .max_by_key(|e| e.1)
528 .clone()
529 else {
530 let _ = tx.send(Err(anyhow!(LanguageNotFound)));
531 return rx;
532 };
533
534 // If the language is already loaded, resolve with it immediately.
535 for loaded_language in state.languages.iter() {
536 if loaded_language.id == language.id {
537 let _ = tx.send(Ok(loaded_language.clone()));
538 return rx;
539 }
540 }
541
542 match state.loading_languages.entry(language.id) {
543 // If the language is already being loaded, then add this
544 // channel to a list that will be sent to when the load completes.
545 hash_map::Entry::Occupied(mut entry) => entry.get_mut().push(tx),
546
547 // Otherwise, start loading the language.
548 hash_map::Entry::Vacant(entry) => {
549 let this = self.clone();
550 self.executor
551 .spawn(async move {
552 let id = language.id;
553 let name = language.name.clone();
554 let language = async {
555 let (config, queries, provider) = (language.load)()?;
556
557 if let Some(grammar) = config.grammar.clone() {
558 let grammar = Some(this.get_or_load_grammar(grammar).await?);
559 Language::new_with_id(id, config, grammar)
560 .with_context_provider(provider)
561 .with_queries(queries)
562 } else {
563 Ok(Language::new_with_id(id, config, None)
564 .with_context_provider(provider))
565 }
566 }
567 .await;
568
569 match language {
570 Ok(language) => {
571 let language = Arc::new(language);
572 let mut state = this.state.write();
573
574 state.add(language.clone());
575 state.mark_language_loaded(id);
576 if let Some(mut txs) = state.loading_languages.remove(&id) {
577 for tx in txs.drain(..) {
578 let _ = tx.send(Ok(language.clone()));
579 }
580 }
581 }
582 Err(e) => {
583 log::error!("failed to load language {name}:\n{:?}", e);
584 let mut state = this.state.write();
585 state.mark_language_loaded(id);
586 if let Some(mut txs) = state.loading_languages.remove(&id) {
587 for tx in txs.drain(..) {
588 let _ = tx.send(Err(anyhow!(
589 "failed to load language {}: {}",
590 name,
591 e
592 )));
593 }
594 }
595 }
596 };
597 })
598 .detach();
599 entry.insert(vec![tx]);
600 }
601 }
602
603 rx
604 }
605
606 fn get_or_load_grammar(
607 self: &Arc<Self>,
608 name: Arc<str>,
609 ) -> impl Future<Output = Result<tree_sitter::Language>> {
610 let (tx, rx) = oneshot::channel();
611 let mut state = self.state.write();
612
613 if let Some(grammar) = state.grammars.get_mut(name.as_ref()) {
614 match grammar {
615 AvailableGrammar::LoadFailed(error) => {
616 tx.send(Err(error.clone())).ok();
617 }
618 AvailableGrammar::Native(grammar) | AvailableGrammar::Loaded(_, grammar) => {
619 tx.send(Ok(grammar.clone())).ok();
620 }
621 AvailableGrammar::Loading(_, txs) => {
622 txs.push(tx);
623 }
624 AvailableGrammar::Unloaded(wasm_path) => {
625 let this = self.clone();
626 let wasm_path = wasm_path.clone();
627 *grammar = AvailableGrammar::Loading(wasm_path.clone(), vec![tx]);
628 self.executor
629 .spawn(async move {
630 let grammar_result = maybe!({
631 let wasm_bytes = std::fs::read(&wasm_path)?;
632 let grammar_name = wasm_path
633 .file_stem()
634 .and_then(OsStr::to_str)
635 .ok_or_else(|| anyhow!("invalid grammar filename"))?;
636 anyhow::Ok(PARSER.with(|parser| {
637 let mut parser = parser.borrow_mut();
638 let mut store = parser.take_wasm_store().unwrap();
639 let grammar = store.load_language(&grammar_name, &wasm_bytes);
640 parser.set_wasm_store(store).unwrap();
641 grammar
642 })?)
643 })
644 .map_err(Arc::new);
645
646 let value = match &grammar_result {
647 Ok(grammar) => AvailableGrammar::Loaded(wasm_path, grammar.clone()),
648 Err(error) => AvailableGrammar::LoadFailed(error.clone()),
649 };
650
651 let old_value = this.state.write().grammars.insert(name, value);
652 if let Some(AvailableGrammar::Loading(_, txs)) = old_value {
653 for tx in txs {
654 tx.send(grammar_result.clone()).ok();
655 }
656 }
657 })
658 .detach();
659 }
660 }
661 } else {
662 tx.send(Err(Arc::new(anyhow!("no such grammar {}", name))))
663 .ok();
664 }
665
666 async move { rx.await?.map_err(|e| anyhow!(e)) }
667 }
668
669 pub fn to_vec(&self) -> Vec<Arc<Language>> {
670 self.state.read().languages.iter().cloned().collect()
671 }
672
673 pub fn lsp_adapters(&self, language: &Arc<Language>) -> Vec<Arc<CachedLspAdapter>> {
674 self.state
675 .read()
676 .lsp_adapters
677 .get(&language.config.name)
678 .cloned()
679 .unwrap_or_default()
680 }
681
682 pub fn all_prettier_plugins(&self) -> Vec<Arc<str>> {
683 let state = self.state.read();
684 state
685 .languages
686 .iter()
687 .flat_map(|language| language.config.prettier_plugins.iter().cloned())
688 .collect()
689 }
690
691 pub fn update_lsp_status(
692 &self,
693 server_name: LanguageServerName,
694 status: LanguageServerBinaryStatus,
695 ) {
696 self.lsp_binary_status_tx.send(server_name, status);
697 }
698
699 pub fn create_pending_language_server(
700 self: &Arc<Self>,
701 stderr_capture: Arc<Mutex<Option<String>>>,
702 language: Arc<Language>,
703 adapter: Arc<CachedLspAdapter>,
704 root_path: Arc<Path>,
705 delegate: Arc<dyn LspAdapterDelegate>,
706 cx: &mut AppContext,
707 ) -> Option<PendingLanguageServer> {
708 let server_id = self.state.write().next_language_server_id();
709 log::info!(
710 "starting language server {:?}, path: {root_path:?}, id: {server_id}",
711 adapter.name.0
712 );
713
714 let download_dir = self
715 .language_server_download_dir
716 .clone()
717 .ok_or_else(|| anyhow!("language server download directory has not been assigned before starting server"))
718 .log_err()?;
719 let language = language.clone();
720 let container_dir: Arc<Path> = Arc::from(download_dir.join(adapter.name.0.as_ref()));
721 let root_path = root_path.clone();
722 let login_shell_env_loaded = self.login_shell_env_loaded.clone();
723 let this = Arc::downgrade(self);
724
725 let task = cx.spawn({
726 let container_dir = container_dir.clone();
727 move |mut cx| async move {
728 // If we want to install a binary globally, we need to wait for
729 // the login shell to be set on our process.
730 login_shell_env_loaded.await;
731
732 let binary_result = adapter
733 .clone()
734 .get_language_server_command(
735 language.clone(),
736 container_dir,
737 delegate.clone(),
738 &mut cx,
739 )
740 .await;
741
742 delegate.update_status(adapter.name.clone(), LanguageServerBinaryStatus::None);
743
744 let binary = binary_result?;
745 let options = adapter
746 .adapter
747 .clone()
748 .initialization_options(&delegate)
749 .await?;
750
751 if let Some(task) = adapter.will_start_server(&delegate, &mut cx) {
752 task.await?;
753 }
754
755 #[cfg(any(test, feature = "test-support"))]
756 if true {
757 let capabilities = adapter
758 .as_fake()
759 .map(|fake_adapter| fake_adapter.capabilities.clone())
760 .unwrap_or_else(|| lsp::ServerCapabilities {
761 completion_provider: Some(Default::default()),
762 ..Default::default()
763 });
764
765 let (server, mut fake_server) = lsp::FakeLanguageServer::new(
766 server_id,
767 binary,
768 adapter.name.0.to_string(),
769 capabilities,
770 cx.clone(),
771 );
772
773 if let Some(fake_adapter) = adapter.as_fake() {
774 if let Some(initializer) = &fake_adapter.initializer {
775 initializer(&mut fake_server);
776 }
777 }
778
779 cx.background_executor()
780 .spawn(async move {
781 if fake_server
782 .try_receive_notification::<lsp::notification::Initialized>()
783 .await
784 .is_some()
785 {
786 if let Some(this) = this.upgrade() {
787 if let Some(txs) = this
788 .state
789 .write()
790 .fake_server_txs
791 .get_mut(language.name().as_ref())
792 {
793 for tx in txs {
794 tx.unbounded_send(fake_server.clone()).ok();
795 }
796 }
797 }
798 }
799 })
800 .detach();
801
802 return Ok((server, options));
803 }
804
805 drop(this);
806 Ok((
807 lsp::LanguageServer::new(
808 stderr_capture,
809 server_id,
810 binary,
811 &root_path,
812 adapter.code_action_kinds(),
813 cx,
814 )?,
815 options,
816 ))
817 }
818 });
819
820 Some(PendingLanguageServer {
821 server_id,
822 task,
823 container_dir: Some(container_dir),
824 })
825 }
826
827 pub fn language_server_binary_statuses(
828 &self,
829 ) -> mpsc::UnboundedReceiver<(LanguageServerName, LanguageServerBinaryStatus)> {
830 self.lsp_binary_status_tx.subscribe()
831 }
832
833 pub fn delete_server_container(
834 &self,
835 adapter: Arc<CachedLspAdapter>,
836 cx: &mut AppContext,
837 ) -> Task<()> {
838 log::info!("deleting server container");
839
840 let download_dir = self
841 .language_server_download_dir
842 .clone()
843 .expect("language server download directory has not been assigned before deleting server container");
844
845 cx.spawn(|_| async move {
846 let container_dir = download_dir.join(adapter.name.0.as_ref());
847 smol::fs::remove_dir_all(container_dir)
848 .await
849 .context("server container removal")
850 .log_err();
851 })
852 }
853
854 pub fn next_language_server_id(&self) -> LanguageServerId {
855 self.state.write().next_language_server_id()
856 }
857}
858
859impl LanguageRegistryState {
860 fn next_language_server_id(&mut self) -> LanguageServerId {
861 LanguageServerId(post_inc(&mut self.next_language_server_id))
862 }
863
864 fn add(&mut self, language: Arc<Language>) {
865 if let Some(theme) = self.theme.as_ref() {
866 language.set_theme(theme.syntax());
867 }
868 self.language_settings.languages.insert(
869 language.name(),
870 LanguageSettingsContent {
871 tab_size: language.config.tab_size,
872 hard_tabs: language.config.hard_tabs,
873 soft_wrap: language.config.soft_wrap,
874 ..Default::default()
875 }
876 .clone(),
877 );
878 self.languages.push(language);
879 self.version += 1;
880 *self.subscription.0.borrow_mut() = ();
881 }
882
883 fn reload(&mut self) {
884 self.languages.clear();
885 self.version += 1;
886 self.reload_count += 1;
887 for language in &mut self.available_languages {
888 language.loaded = false;
889 }
890 *self.subscription.0.borrow_mut() = ();
891 }
892
893 fn remove_languages(
894 &mut self,
895 languages_to_remove: &[Arc<str>],
896 grammars_to_remove: &[Arc<str>],
897 ) {
898 if languages_to_remove.is_empty() && grammars_to_remove.is_empty() {
899 return;
900 }
901
902 self.languages
903 .retain(|language| !languages_to_remove.contains(&language.name()));
904 self.available_languages
905 .retain(|language| !languages_to_remove.contains(&language.name));
906 self.grammars
907 .retain(|name, _| !grammars_to_remove.contains(&name));
908 self.version += 1;
909 self.reload_count += 1;
910 *self.subscription.0.borrow_mut() = ();
911 }
912
913 /// Mark the given language as having been loaded, so that the
914 /// language registry won't try to load it again.
915 fn mark_language_loaded(&mut self, id: LanguageId) {
916 for language in &mut self.available_languages {
917 if language.id == id {
918 language.loaded = true;
919 break;
920 }
921 }
922 }
923}
924
925impl LspBinaryStatusSender {
926 fn subscribe(
927 &self,
928 ) -> mpsc::UnboundedReceiver<(LanguageServerName, LanguageServerBinaryStatus)> {
929 let (tx, rx) = mpsc::unbounded();
930 self.txs.lock().push(tx);
931 rx
932 }
933
934 fn send(&self, name: LanguageServerName, status: LanguageServerBinaryStatus) {
935 let mut txs = self.txs.lock();
936 txs.retain(|tx| tx.unbounded_send((name.clone(), status.clone())).is_ok());
937 }
938}