1use std::{path::PathBuf, sync::Arc};
2
3use anyhow::{anyhow, Context as _, Result};
4use client::{proto, TypedEnvelope};
5use collections::{HashMap, HashSet};
6use extension::{
7 Extension, ExtensionHostProxy, ExtensionLanguageProxy, ExtensionLanguageServerProxy,
8 ExtensionManifest,
9};
10use fs::{Fs, RemoveOptions, RenameOptions};
11use gpui::{App, AppContext as _, AsyncApp, Context, Entity, Task, WeakEntity};
12use http_client::HttpClient;
13use language::{LanguageConfig, LanguageName, LanguageQueries, LoadedLanguage};
14use lsp::LanguageServerName;
15use node_runtime::NodeRuntime;
16
17use crate::wasm_host::{WasmExtension, WasmHost};
18
19#[derive(Clone, Debug)]
20pub struct ExtensionVersion {
21 pub id: String,
22 pub version: String,
23 pub dev: bool,
24}
25
26pub struct HeadlessExtensionStore {
27 pub fs: Arc<dyn Fs>,
28 pub extension_dir: PathBuf,
29 pub proxy: Arc<ExtensionHostProxy>,
30 pub wasm_host: Arc<WasmHost>,
31 pub loaded_extensions: HashMap<Arc<str>, Arc<str>>,
32 pub loaded_languages: HashMap<Arc<str>, Vec<LanguageName>>,
33 pub loaded_language_servers: HashMap<Arc<str>, Vec<(LanguageServerName, LanguageName)>>,
34}
35
36impl HeadlessExtensionStore {
37 pub fn new(
38 fs: Arc<dyn Fs>,
39 http_client: Arc<dyn HttpClient>,
40 extension_dir: PathBuf,
41 extension_host_proxy: Arc<ExtensionHostProxy>,
42 node_runtime: NodeRuntime,
43 cx: &mut App,
44 ) -> Entity<Self> {
45 cx.new(|cx| Self {
46 fs: fs.clone(),
47 wasm_host: WasmHost::new(
48 fs.clone(),
49 http_client.clone(),
50 node_runtime,
51 extension_host_proxy.clone(),
52 extension_dir.join("work"),
53 cx,
54 ),
55 extension_dir,
56 proxy: extension_host_proxy,
57 loaded_extensions: Default::default(),
58 loaded_languages: Default::default(),
59 loaded_language_servers: Default::default(),
60 })
61 }
62
63 pub fn sync_extensions(
64 &mut self,
65 extensions: Vec<ExtensionVersion>,
66 cx: &Context<Self>,
67 ) -> Task<Result<Vec<ExtensionVersion>>> {
68 let on_client = HashSet::from_iter(extensions.iter().map(|e| e.id.as_str()));
69 let to_remove: Vec<Arc<str>> = self
70 .loaded_extensions
71 .keys()
72 .filter(|id| !on_client.contains(id.as_ref()))
73 .cloned()
74 .collect();
75 let to_load: Vec<ExtensionVersion> = extensions
76 .into_iter()
77 .filter(|e| {
78 if e.dev {
79 return true;
80 }
81 self.loaded_extensions
82 .get(e.id.as_str())
83 .is_none_or(|loaded| loaded.as_ref() != e.version.as_str())
84 })
85 .collect();
86
87 cx.spawn(|this, mut cx| async move {
88 let mut missing = Vec::new();
89
90 for extension_id in to_remove {
91 log::info!("removing extension: {}", extension_id);
92 this.update(&mut cx, |this, cx| {
93 this.uninstall_extension(&extension_id, cx)
94 })?
95 .await?;
96 }
97
98 for extension in to_load {
99 if let Err(e) = Self::load_extension(this.clone(), extension.clone(), &mut cx).await
100 {
101 log::info!("failed to load extension: {}, {:?}", extension.id, e);
102 missing.push(extension)
103 } else if extension.dev {
104 missing.push(extension)
105 }
106 }
107
108 Ok(missing)
109 })
110 }
111
112 pub async fn load_extension(
113 this: WeakEntity<Self>,
114 extension: ExtensionVersion,
115 cx: &mut AsyncApp,
116 ) -> Result<()> {
117 let (fs, wasm_host, extension_dir) = this.update(cx, |this, _cx| {
118 this.loaded_extensions.insert(
119 extension.id.clone().into(),
120 extension.version.clone().into(),
121 );
122 (
123 this.fs.clone(),
124 this.wasm_host.clone(),
125 this.extension_dir.join(&extension.id),
126 )
127 })?;
128
129 let manifest = Arc::new(ExtensionManifest::load(fs.clone(), &extension_dir).await?);
130
131 debug_assert!(!manifest.languages.is_empty() || !manifest.language_servers.is_empty());
132
133 if manifest.version.as_ref() != extension.version.as_str() {
134 anyhow::bail!(
135 "mismatched versions: ({}) != ({})",
136 manifest.version,
137 extension.version
138 )
139 }
140
141 for language_path in &manifest.languages {
142 let language_path = extension_dir.join(language_path);
143 let config = fs.load(&language_path.join("config.toml")).await?;
144 let mut config = ::toml::from_str::<LanguageConfig>(&config)?;
145
146 this.update(cx, |this, _cx| {
147 this.loaded_languages
148 .entry(manifest.id.clone())
149 .or_default()
150 .push(config.name.clone());
151
152 config.grammar = None;
153
154 this.proxy.register_language(
155 config.name.clone(),
156 None,
157 config.matcher.clone(),
158 config.hidden,
159 Arc::new(move || {
160 Ok(LoadedLanguage {
161 config: config.clone(),
162 queries: LanguageQueries::default(),
163 context_provider: None,
164 toolchain_provider: None,
165 })
166 }),
167 );
168 })?;
169 }
170
171 if manifest.language_servers.is_empty() {
172 return Ok(());
173 }
174
175 let wasm_extension: Arc<dyn Extension> =
176 Arc::new(WasmExtension::load(extension_dir, &manifest, wasm_host.clone(), &cx).await?);
177
178 for (language_server_id, language_server_config) in &manifest.language_servers {
179 for language in language_server_config.languages() {
180 this.update(cx, |this, _cx| {
181 this.loaded_language_servers
182 .entry(manifest.id.clone())
183 .or_default()
184 .push((language_server_id.clone(), language.clone()));
185 this.proxy.register_language_server(
186 wasm_extension.clone(),
187 language_server_id.clone(),
188 language.clone(),
189 );
190 })?;
191 }
192 }
193
194 Ok(())
195 }
196
197 fn uninstall_extension(
198 &mut self,
199 extension_id: &Arc<str>,
200 cx: &mut Context<Self>,
201 ) -> Task<Result<()>> {
202 self.loaded_extensions.remove(extension_id);
203
204 let languages_to_remove = self
205 .loaded_languages
206 .remove(extension_id)
207 .unwrap_or_default();
208 self.proxy.remove_languages(&languages_to_remove, &[]);
209
210 for (language_server_name, language) in self
211 .loaded_language_servers
212 .remove(extension_id)
213 .unwrap_or_default()
214 {
215 self.proxy
216 .remove_language_server(&language, &language_server_name);
217 }
218
219 let path = self.extension_dir.join(&extension_id.to_string());
220 let fs = self.fs.clone();
221 cx.spawn(|_, _| async move {
222 fs.remove_dir(
223 &path,
224 RemoveOptions {
225 recursive: true,
226 ignore_if_not_exists: true,
227 },
228 )
229 .await
230 })
231 }
232
233 pub fn install_extension(
234 &mut self,
235 extension: ExtensionVersion,
236 tmp_path: PathBuf,
237 cx: &mut Context<Self>,
238 ) -> Task<Result<()>> {
239 let path = self.extension_dir.join(&extension.id);
240 let fs = self.fs.clone();
241
242 cx.spawn(|this, mut cx| async move {
243 if fs.is_dir(&path).await {
244 this.update(&mut cx, |this, cx| {
245 this.uninstall_extension(&extension.id.clone().into(), cx)
246 })?
247 .await?;
248 }
249
250 fs.rename(&tmp_path, &path, RenameOptions::default())
251 .await?;
252
253 Self::load_extension(this, extension, &mut cx).await
254 })
255 }
256
257 pub async fn handle_sync_extensions(
258 extension_store: Entity<HeadlessExtensionStore>,
259 envelope: TypedEnvelope<proto::SyncExtensions>,
260 mut cx: AsyncApp,
261 ) -> Result<proto::SyncExtensionsResponse> {
262 let requested_extensions =
263 envelope
264 .payload
265 .extensions
266 .into_iter()
267 .map(|p| ExtensionVersion {
268 id: p.id,
269 version: p.version,
270 dev: p.dev,
271 });
272 let missing_extensions = extension_store
273 .update(&mut cx, |extension_store, cx| {
274 extension_store.sync_extensions(requested_extensions.collect(), cx)
275 })?
276 .await?;
277
278 Ok(proto::SyncExtensionsResponse {
279 missing_extensions: missing_extensions
280 .into_iter()
281 .map(|e| proto::Extension {
282 id: e.id,
283 version: e.version,
284 dev: e.dev,
285 })
286 .collect(),
287 tmp_dir: paths::remote_extensions_uploads_dir()
288 .to_string_lossy()
289 .to_string(),
290 })
291 }
292
293 pub async fn handle_install_extension(
294 extensions: Entity<HeadlessExtensionStore>,
295 envelope: TypedEnvelope<proto::InstallExtension>,
296 mut cx: AsyncApp,
297 ) -> Result<proto::Ack> {
298 let extension = envelope
299 .payload
300 .extension
301 .with_context(|| anyhow!("Invalid InstallExtension request"))?;
302
303 extensions
304 .update(&mut cx, |extensions, cx| {
305 extensions.install_extension(
306 ExtensionVersion {
307 id: extension.id,
308 version: extension.version,
309 dev: extension.dev,
310 },
311 PathBuf::from(envelope.payload.tmp_dir),
312 cx,
313 )
314 })?
315 .await?;
316
317 Ok(proto::Ack {})
318 }
319}