1use std::{path::PathBuf, sync::Arc};
2
3use anyhow::{Context as _, Result, anyhow};
4use client::{TypedEnvelope, proto};
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(async move |this, cx| {
88 let mut missing = Vec::new();
89
90 for extension_id in to_remove {
91 log::info!("removing extension: {}", extension_id);
92 this.update(cx, |this, cx| this.uninstall_extension(&extension_id, cx))?
93 .await?;
94 }
95
96 for extension in to_load {
97 if let Err(e) = Self::load_extension(this.clone(), extension.clone(), cx).await {
98 log::info!("failed to load extension: {}, {:?}", extension.id, e);
99 missing.push(extension)
100 } else if extension.dev {
101 missing.push(extension)
102 }
103 }
104
105 Ok(missing)
106 })
107 }
108
109 pub async fn load_extension(
110 this: WeakEntity<Self>,
111 extension: ExtensionVersion,
112 cx: &mut AsyncApp,
113 ) -> Result<()> {
114 let (fs, wasm_host, extension_dir) = this.update(cx, |this, _cx| {
115 this.loaded_extensions.insert(
116 extension.id.clone().into(),
117 extension.version.clone().into(),
118 );
119 (
120 this.fs.clone(),
121 this.wasm_host.clone(),
122 this.extension_dir.join(&extension.id),
123 )
124 })?;
125
126 let manifest = Arc::new(ExtensionManifest::load(fs.clone(), &extension_dir).await?);
127
128 debug_assert!(!manifest.languages.is_empty() || !manifest.language_servers.is_empty());
129
130 if manifest.version.as_ref() != extension.version.as_str() {
131 anyhow::bail!(
132 "mismatched versions: ({}) != ({})",
133 manifest.version,
134 extension.version
135 )
136 }
137
138 for language_path in &manifest.languages {
139 let language_path = extension_dir.join(language_path);
140 let config = fs.load(&language_path.join("config.toml")).await?;
141 let mut config = ::toml::from_str::<LanguageConfig>(&config)?;
142
143 this.update(cx, |this, _cx| {
144 this.loaded_languages
145 .entry(manifest.id.clone())
146 .or_default()
147 .push(config.name.clone());
148
149 config.grammar = None;
150
151 this.proxy.register_language(
152 config.clone(),
153 Arc::new(move || {
154 Ok(LoadedLanguage {
155 config: config.clone(),
156 queries: LanguageQueries::default(),
157 context_provider: None,
158 toolchain_provider: None,
159 })
160 }),
161 );
162 })?;
163 }
164
165 if manifest.language_servers.is_empty() {
166 return Ok(());
167 }
168
169 let wasm_extension: Arc<dyn Extension> =
170 Arc::new(WasmExtension::load(extension_dir, &manifest, wasm_host.clone(), &cx).await?);
171
172 for (language_server_id, language_server_config) in &manifest.language_servers {
173 for language in language_server_config.languages() {
174 this.update(cx, |this, _cx| {
175 this.loaded_language_servers
176 .entry(manifest.id.clone())
177 .or_default()
178 .push((language_server_id.clone(), language.clone()));
179 this.proxy.register_language_server(
180 wasm_extension.clone(),
181 language_server_id.clone(),
182 language.clone(),
183 );
184 })?;
185 }
186 }
187
188 Ok(())
189 }
190
191 fn uninstall_extension(
192 &mut self,
193 extension_id: &Arc<str>,
194 cx: &mut Context<Self>,
195 ) -> Task<Result<()>> {
196 self.loaded_extensions.remove(extension_id);
197
198 let languages_to_remove = self
199 .loaded_languages
200 .remove(extension_id)
201 .unwrap_or_default();
202 self.proxy.remove_languages(&languages_to_remove, &[]);
203
204 for (language_server_name, language) in self
205 .loaded_language_servers
206 .remove(extension_id)
207 .unwrap_or_default()
208 {
209 self.proxy
210 .remove_language_server(&language, &language_server_name);
211 }
212
213 let path = self.extension_dir.join(&extension_id.to_string());
214 let fs = self.fs.clone();
215 cx.spawn(async move |_, _| {
216 fs.remove_dir(
217 &path,
218 RemoveOptions {
219 recursive: true,
220 ignore_if_not_exists: true,
221 },
222 )
223 .await
224 })
225 }
226
227 pub fn install_extension(
228 &mut self,
229 extension: ExtensionVersion,
230 tmp_path: PathBuf,
231 cx: &mut Context<Self>,
232 ) -> Task<Result<()>> {
233 let path = self.extension_dir.join(&extension.id);
234 let fs = self.fs.clone();
235
236 cx.spawn(async move |this, cx| {
237 if fs.is_dir(&path).await {
238 this.update(cx, |this, cx| {
239 this.uninstall_extension(&extension.id.clone().into(), cx)
240 })?
241 .await?;
242 }
243
244 fs.rename(&tmp_path, &path, RenameOptions::default())
245 .await?;
246
247 Self::load_extension(this, extension, cx).await
248 })
249 }
250
251 pub async fn handle_sync_extensions(
252 extension_store: Entity<HeadlessExtensionStore>,
253 envelope: TypedEnvelope<proto::SyncExtensions>,
254 mut cx: AsyncApp,
255 ) -> Result<proto::SyncExtensionsResponse> {
256 let requested_extensions =
257 envelope
258 .payload
259 .extensions
260 .into_iter()
261 .map(|p| ExtensionVersion {
262 id: p.id,
263 version: p.version,
264 dev: p.dev,
265 });
266 let missing_extensions = extension_store
267 .update(&mut cx, |extension_store, cx| {
268 extension_store.sync_extensions(requested_extensions.collect(), cx)
269 })?
270 .await?;
271
272 Ok(proto::SyncExtensionsResponse {
273 missing_extensions: missing_extensions
274 .into_iter()
275 .map(|e| proto::Extension {
276 id: e.id,
277 version: e.version,
278 dev: e.dev,
279 })
280 .collect(),
281 tmp_dir: paths::remote_extensions_uploads_dir()
282 .to_string_lossy()
283 .to_string(),
284 })
285 }
286
287 pub async fn handle_install_extension(
288 extensions: Entity<HeadlessExtensionStore>,
289 envelope: TypedEnvelope<proto::InstallExtension>,
290 mut cx: AsyncApp,
291 ) -> Result<proto::Ack> {
292 let extension = envelope
293 .payload
294 .extension
295 .with_context(|| anyhow!("Invalid InstallExtension request"))?;
296
297 extensions
298 .update(&mut cx, |extensions, cx| {
299 extensions.install_extension(
300 ExtensionVersion {
301 id: extension.id,
302 version: extension.version,
303 dev: extension.dev,
304 },
305 PathBuf::from(envelope.payload.tmp_dir),
306 cx,
307 )
308 })?
309 .await?;
310
311 Ok(proto::Ack {})
312 }
313}