1use std::path::Path;
2use std::sync::atomic::AtomicBool;
3use std::sync::Arc;
4use std::time::Duration;
5
6use anyhow::{anyhow, bail, Result};
7use assistant_slash_command::{
8 ArgumentCompletion, SlashCommand, SlashCommandOutput, SlashCommandOutputSection,
9};
10use feature_flags::FeatureFlag;
11use gpui::{AppContext, BackgroundExecutor, Model, Task, WeakView};
12use indexed_docs::{
13 DocsDotRsProvider, IndexedDocsRegistry, IndexedDocsStore, LocalRustdocProvider, PackageName,
14 ProviderId,
15};
16use language::LspAdapterDelegate;
17use project::{Project, ProjectPath};
18use ui::prelude::*;
19use util::{maybe, ResultExt};
20use workspace::Workspace;
21
22pub(crate) struct DocsSlashCommandFeatureFlag;
23
24impl FeatureFlag for DocsSlashCommandFeatureFlag {
25 const NAME: &'static str = "docs-slash-command";
26}
27
28pub(crate) struct DocsSlashCommand;
29
30impl DocsSlashCommand {
31 pub const NAME: &'static str = "docs";
32
33 fn path_to_cargo_toml(project: Model<Project>, cx: &mut AppContext) -> Option<Arc<Path>> {
34 let worktree = project.read(cx).worktrees(cx).next()?;
35 let worktree = worktree.read(cx);
36 let entry = worktree.entry_for_path("Cargo.toml")?;
37 let path = ProjectPath {
38 worktree_id: worktree.id(),
39 path: entry.path.clone(),
40 };
41 Some(Arc::from(
42 project.read(cx).absolute_path(&path, cx)?.as_path(),
43 ))
44 }
45
46 /// Ensures that the indexed doc providers for Rust are registered.
47 ///
48 /// Ideally we would do this sooner, but we need to wait until we're able to
49 /// access the workspace so we can read the project.
50 fn ensure_rust_doc_providers_are_registered(
51 &self,
52 workspace: Option<WeakView<Workspace>>,
53 cx: &mut AppContext,
54 ) {
55 let indexed_docs_registry = IndexedDocsRegistry::global(cx);
56 if indexed_docs_registry
57 .get_provider_store(LocalRustdocProvider::id())
58 .is_none()
59 {
60 let index_provider_deps = maybe!({
61 let workspace = workspace.clone().ok_or_else(|| anyhow!("no workspace"))?;
62 let workspace = workspace
63 .upgrade()
64 .ok_or_else(|| anyhow!("workspace was dropped"))?;
65 let project = workspace.read(cx).project().clone();
66 let fs = project.read(cx).fs().clone();
67 let cargo_workspace_root = Self::path_to_cargo_toml(project, cx)
68 .and_then(|path| path.parent().map(|path| path.to_path_buf()))
69 .ok_or_else(|| anyhow!("no Cargo workspace root found"))?;
70
71 anyhow::Ok((fs, cargo_workspace_root))
72 });
73
74 if let Some((fs, cargo_workspace_root)) = index_provider_deps.log_err() {
75 indexed_docs_registry.register_provider(Box::new(LocalRustdocProvider::new(
76 fs,
77 cargo_workspace_root,
78 )));
79 }
80 }
81
82 if indexed_docs_registry
83 .get_provider_store(DocsDotRsProvider::id())
84 .is_none()
85 {
86 let http_client = maybe!({
87 let workspace = workspace.ok_or_else(|| anyhow!("no workspace"))?;
88 let workspace = workspace
89 .upgrade()
90 .ok_or_else(|| anyhow!("workspace was dropped"))?;
91 let project = workspace.read(cx).project().clone();
92 anyhow::Ok(project.read(cx).client().http_client().clone())
93 });
94
95 if let Some(http_client) = http_client.log_err() {
96 indexed_docs_registry
97 .register_provider(Box::new(DocsDotRsProvider::new(http_client)));
98 }
99 }
100 }
101
102 /// Runs just-in-time indexing for a given package, in case the slash command
103 /// is run without any entries existing in the index.
104 fn run_just_in_time_indexing(
105 store: Arc<IndexedDocsStore>,
106 key: String,
107 package: PackageName,
108 executor: BackgroundExecutor,
109 ) -> Task<()> {
110 executor.clone().spawn(async move {
111 let (prefix, needs_full_index) = if let Some((prefix, _)) = key.split_once('*') {
112 // If we have a wildcard in the search, we want to wait until
113 // we've completely finished indexing so we get a full set of
114 // results for the wildcard.
115 (prefix.to_string(), true)
116 } else {
117 (key, false)
118 };
119
120 // If we already have some entries, we assume that we've indexed the package before
121 // and don't need to do it again.
122 let has_any_entries = store
123 .any_with_prefix(prefix.clone())
124 .await
125 .unwrap_or_default();
126 if has_any_entries {
127 return ();
128 };
129
130 let index_task = store.clone().index(package.clone());
131
132 if needs_full_index {
133 _ = index_task.await;
134 } else {
135 loop {
136 executor.timer(Duration::from_millis(200)).await;
137
138 if store
139 .any_with_prefix(prefix.clone())
140 .await
141 .unwrap_or_default()
142 || !store.is_indexing(&package)
143 {
144 break;
145 }
146 }
147 }
148 })
149 }
150}
151
152impl SlashCommand for DocsSlashCommand {
153 fn name(&self) -> String {
154 Self::NAME.into()
155 }
156
157 fn description(&self) -> String {
158 "insert docs".into()
159 }
160
161 fn menu_text(&self) -> String {
162 "Insert Documentation".into()
163 }
164
165 fn requires_argument(&self) -> bool {
166 true
167 }
168
169 fn complete_argument(
170 self: Arc<Self>,
171 query: String,
172 _cancel: Arc<AtomicBool>,
173 workspace: Option<WeakView<Workspace>>,
174 cx: &mut AppContext,
175 ) -> Task<Result<Vec<ArgumentCompletion>>> {
176 self.ensure_rust_doc_providers_are_registered(workspace, cx);
177
178 let indexed_docs_registry = IndexedDocsRegistry::global(cx);
179 let args = DocsSlashCommandArgs::parse(&query);
180 let store = args
181 .provider()
182 .ok_or_else(|| anyhow!("no docs provider specified"))
183 .and_then(|provider| IndexedDocsStore::try_global(provider, cx));
184 cx.background_executor().spawn(async move {
185 fn build_completions(
186 provider: ProviderId,
187 items: Vec<String>,
188 ) -> Vec<ArgumentCompletion> {
189 items
190 .into_iter()
191 .map(|item| ArgumentCompletion {
192 label: item.clone(),
193 new_text: format!("{provider} {item}"),
194 run_command: true,
195 })
196 .collect()
197 }
198
199 match args {
200 DocsSlashCommandArgs::NoProvider => {
201 let providers = indexed_docs_registry.list_providers();
202 if providers.is_empty() {
203 return Ok(vec![ArgumentCompletion {
204 label: "No available docs providers.".to_string(),
205 new_text: String::new(),
206 run_command: false,
207 }]);
208 }
209
210 Ok(providers
211 .into_iter()
212 .map(|provider| ArgumentCompletion {
213 label: provider.to_string(),
214 new_text: provider.to_string(),
215 run_command: false,
216 })
217 .collect())
218 }
219 DocsSlashCommandArgs::SearchPackageDocs {
220 provider,
221 package,
222 index,
223 } => {
224 let store = store?;
225
226 if index {
227 // We don't need to hold onto this task, as the `IndexedDocsStore` will hold it
228 // until it completes.
229 drop(store.clone().index(package.as_str().into()));
230 }
231
232 let items = store.search(package).await;
233 Ok(build_completions(provider, items))
234 }
235 DocsSlashCommandArgs::SearchItemDocs {
236 provider,
237 item_path,
238 ..
239 } => {
240 let store = store?;
241 let items = store.search(item_path).await;
242 Ok(build_completions(provider, items))
243 }
244 }
245 })
246 }
247
248 fn run(
249 self: Arc<Self>,
250 argument: Option<&str>,
251 _workspace: WeakView<Workspace>,
252 _delegate: Option<Arc<dyn LspAdapterDelegate>>,
253 cx: &mut WindowContext,
254 ) -> Task<Result<SlashCommandOutput>> {
255 let Some(argument) = argument else {
256 return Task::ready(Err(anyhow!("missing argument")));
257 };
258
259 let args = DocsSlashCommandArgs::parse(argument);
260 let executor = cx.background_executor().clone();
261 let task = cx.background_executor().spawn({
262 let store = args
263 .provider()
264 .ok_or_else(|| anyhow!("no docs provider specified"))
265 .and_then(|provider| IndexedDocsStore::try_global(provider, cx));
266 async move {
267 let (provider, key) = match args.clone() {
268 DocsSlashCommandArgs::NoProvider => bail!("no docs provider specified"),
269 DocsSlashCommandArgs::SearchPackageDocs {
270 provider, package, ..
271 } => (provider, package),
272 DocsSlashCommandArgs::SearchItemDocs {
273 provider,
274 item_path,
275 ..
276 } => (provider, item_path),
277 };
278
279 let store = store?;
280
281 if let Some(package) = args.package() {
282 Self::run_just_in_time_indexing(store.clone(), key.clone(), package, executor)
283 .await;
284 }
285
286 let (text, ranges) = if let Some((prefix, _)) = key.split_once('*') {
287 let docs = store.load_many_by_prefix(prefix.to_string()).await?;
288
289 let mut text = String::new();
290 let mut ranges = Vec::new();
291
292 for (key, docs) in docs {
293 let prev_len = text.len();
294
295 text.push_str(&docs.0);
296 text.push_str("\n");
297 ranges.push((key, prev_len..text.len()));
298 text.push_str("\n");
299 }
300
301 (text, ranges)
302 } else {
303 let item_docs = store.load(key.clone()).await?;
304 let text = item_docs.to_string();
305 let range = 0..text.len();
306
307 (text, vec![(key, range)])
308 };
309
310 anyhow::Ok((provider, text, ranges))
311 }
312 });
313
314 cx.foreground_executor().spawn(async move {
315 let (provider, text, ranges) = task.await?;
316 Ok(SlashCommandOutput {
317 text,
318 sections: ranges
319 .into_iter()
320 .map(|(key, range)| SlashCommandOutputSection {
321 range,
322 icon: IconName::FileDoc,
323 label: format!("docs ({provider}): {key}",).into(),
324 })
325 .collect(),
326 run_commands_in_text: false,
327 })
328 })
329 }
330}
331
332fn is_item_path_delimiter(char: char) -> bool {
333 !char.is_alphanumeric() && char != '-' && char != '_'
334}
335
336#[derive(Debug, PartialEq, Clone)]
337pub(crate) enum DocsSlashCommandArgs {
338 NoProvider,
339 SearchPackageDocs {
340 provider: ProviderId,
341 package: String,
342 index: bool,
343 },
344 SearchItemDocs {
345 provider: ProviderId,
346 package: String,
347 item_path: String,
348 },
349}
350
351impl DocsSlashCommandArgs {
352 pub fn parse(argument: &str) -> Self {
353 let Some((provider, argument)) = argument.split_once(' ') else {
354 return Self::NoProvider;
355 };
356
357 let provider = ProviderId(provider.into());
358
359 if let Some((package, rest)) = argument.split_once(is_item_path_delimiter) {
360 if rest.trim().is_empty() {
361 Self::SearchPackageDocs {
362 provider,
363 package: package.to_owned(),
364 index: true,
365 }
366 } else {
367 Self::SearchItemDocs {
368 provider,
369 package: package.to_owned(),
370 item_path: argument.to_owned(),
371 }
372 }
373 } else {
374 Self::SearchPackageDocs {
375 provider,
376 package: argument.to_owned(),
377 index: false,
378 }
379 }
380 }
381
382 pub fn provider(&self) -> Option<ProviderId> {
383 match self {
384 Self::NoProvider => None,
385 Self::SearchPackageDocs { provider, .. } | Self::SearchItemDocs { provider, .. } => {
386 Some(provider.clone())
387 }
388 }
389 }
390
391 pub fn package(&self) -> Option<PackageName> {
392 match self {
393 Self::NoProvider => None,
394 Self::SearchPackageDocs { package, .. } | Self::SearchItemDocs { package, .. } => {
395 Some(package.as_str().into())
396 }
397 }
398 }
399}
400
401#[cfg(test)]
402mod tests {
403 use super::*;
404
405 #[test]
406 fn test_parse_docs_slash_command_args() {
407 assert_eq!(
408 DocsSlashCommandArgs::parse(""),
409 DocsSlashCommandArgs::NoProvider
410 );
411 assert_eq!(
412 DocsSlashCommandArgs::parse("rustdoc"),
413 DocsSlashCommandArgs::NoProvider
414 );
415
416 assert_eq!(
417 DocsSlashCommandArgs::parse("rustdoc "),
418 DocsSlashCommandArgs::SearchPackageDocs {
419 provider: ProviderId("rustdoc".into()),
420 package: "".into(),
421 index: false
422 }
423 );
424 assert_eq!(
425 DocsSlashCommandArgs::parse("gleam "),
426 DocsSlashCommandArgs::SearchPackageDocs {
427 provider: ProviderId("gleam".into()),
428 package: "".into(),
429 index: false
430 }
431 );
432
433 assert_eq!(
434 DocsSlashCommandArgs::parse("rustdoc gpui"),
435 DocsSlashCommandArgs::SearchPackageDocs {
436 provider: ProviderId("rustdoc".into()),
437 package: "gpui".into(),
438 index: false,
439 }
440 );
441 assert_eq!(
442 DocsSlashCommandArgs::parse("gleam gleam_stdlib"),
443 DocsSlashCommandArgs::SearchPackageDocs {
444 provider: ProviderId("gleam".into()),
445 package: "gleam_stdlib".into(),
446 index: false
447 }
448 );
449
450 // Adding an item path delimiter indicates we can start indexing.
451 assert_eq!(
452 DocsSlashCommandArgs::parse("rustdoc gpui:"),
453 DocsSlashCommandArgs::SearchPackageDocs {
454 provider: ProviderId("rustdoc".into()),
455 package: "gpui".into(),
456 index: true,
457 }
458 );
459 assert_eq!(
460 DocsSlashCommandArgs::parse("gleam gleam_stdlib/"),
461 DocsSlashCommandArgs::SearchPackageDocs {
462 provider: ProviderId("gleam".into()),
463 package: "gleam_stdlib".into(),
464 index: true
465 }
466 );
467
468 assert_eq!(
469 DocsSlashCommandArgs::parse("rustdoc gpui::foo::bar::Baz"),
470 DocsSlashCommandArgs::SearchItemDocs {
471 provider: ProviderId("rustdoc".into()),
472 package: "gpui".into(),
473 item_path: "gpui::foo::bar::Baz".into()
474 }
475 );
476 assert_eq!(
477 DocsSlashCommandArgs::parse("gleam gleam_stdlib/gleam/int"),
478 DocsSlashCommandArgs::SearchItemDocs {
479 provider: ProviderId("gleam".into()),
480 package: "gleam_stdlib".into(),
481 item_path: "gleam_stdlib/gleam/int".into()
482 }
483 );
484 }
485}