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