1use crate::{
2 example::{Example, ExampleBuffer, ExampleState},
3 headless::EpAppState,
4 paths::{REPOS_DIR, WORKTREES_DIR},
5 progress::{InfoStyle, Progress, Step, StepProgress},
6};
7use anyhow::{Context as _, Result};
8use collections::HashMap;
9use edit_prediction::EditPredictionStore;
10use edit_prediction::udiff::OpenedBuffers;
11use futures::{
12 AsyncWriteExt as _,
13 lock::{Mutex, OwnedMutexGuard},
14};
15use gpui::{AsyncApp, Entity};
16use language::{Anchor, Buffer, LanguageNotFound, ToOffset, ToPoint};
17use project::buffer_store::BufferStoreEvent;
18use project::{Project, ProjectPath};
19use std::{
20 cell::RefCell,
21 fs,
22 path::{Path, PathBuf},
23 sync::Arc,
24};
25use util::{paths::PathStyle, rel_path::RelPath};
26use zeta_prompt::CURSOR_MARKER;
27
28pub async fn run_load_project(
29 example: &mut Example,
30 app_state: Arc<EpAppState>,
31 mut cx: AsyncApp,
32) -> Result<()> {
33 if example.state.is_some() {
34 return Ok(());
35 }
36
37 let progress = Progress::global().start(Step::LoadProject, &example.name);
38
39 let project = setup_project(example, &app_state, &progress, &mut cx).await?;
40
41 let _open_buffers = apply_edit_history(example, &project, &mut cx).await?;
42
43 let (buffer, cursor_position) = cursor_position(example, &project, &mut cx).await?;
44 let (example_buffer, language_name) = buffer.read_with(&cx, |buffer, _cx| {
45 let cursor_point = cursor_position.to_point(&buffer);
46 let language_name = buffer
47 .language()
48 .map(|l| l.name().to_string())
49 .unwrap_or_else(|| "Unknown".to_string());
50 (
51 ExampleBuffer {
52 content: buffer.text(),
53 cursor_row: cursor_point.row,
54 cursor_column: cursor_point.column,
55 cursor_offset: cursor_position.to_offset(&buffer),
56 },
57 language_name,
58 )
59 })?;
60
61 progress.set_info(language_name, InfoStyle::Normal);
62
63 example.buffer = Some(example_buffer);
64 example.state = Some(ExampleState {
65 buffer,
66 project,
67 cursor_position,
68 _open_buffers,
69 });
70 Ok(())
71}
72
73async fn cursor_position(
74 example: &Example,
75 project: &Entity<Project>,
76 cx: &mut AsyncApp,
77) -> Result<(Entity<Buffer>, Anchor)> {
78 let language_registry = project.read_with(cx, |project, _| project.languages().clone())?;
79 let result = language_registry
80 .load_language_for_file_path(&example.cursor_path)
81 .await;
82
83 if let Err(error) = result
84 && !error.is::<LanguageNotFound>()
85 {
86 return Err(error);
87 }
88
89 let worktree = project.read_with(cx, |project, cx| {
90 project
91 .visible_worktrees(cx)
92 .next()
93 .context("No visible worktrees")
94 })??;
95
96 let cursor_path = RelPath::new(&example.cursor_path, PathStyle::Posix)
97 .context("Failed to create RelPath")?
98 .into_arc();
99 let cursor_buffer = project
100 .update(cx, |project, cx| {
101 project.open_buffer(
102 ProjectPath {
103 worktree_id: worktree.read(cx).id(),
104 path: cursor_path,
105 },
106 cx,
107 )
108 })?
109 .await?;
110 let cursor_offset_within_excerpt = example
111 .cursor_position
112 .find(CURSOR_MARKER)
113 .context("missing cursor marker")?;
114 let mut cursor_excerpt = example.cursor_position.clone();
115 cursor_excerpt.replace_range(
116 cursor_offset_within_excerpt..(cursor_offset_within_excerpt + CURSOR_MARKER.len()),
117 "",
118 );
119 let excerpt_offset = cursor_buffer.read_with(cx, |buffer, _cx| {
120 let text = buffer.text();
121
122 let mut matches = text.match_indices(&cursor_excerpt);
123 let (excerpt_offset, _) = matches.next().with_context(|| {
124 format!(
125 "\nExcerpt:\n\n{cursor_excerpt}\nBuffer text:\n{text}\n.Example: {}\nCursor excerpt did not exist in buffer.",
126 example.name
127 )
128 })?;
129 anyhow::ensure!(matches.next().is_none(), "More than one cursor position match found for {}", &example.name);
130 Ok(excerpt_offset)
131 })??;
132
133 let cursor_offset = excerpt_offset + cursor_offset_within_excerpt;
134 let cursor_anchor =
135 cursor_buffer.read_with(cx, |buffer, _| buffer.anchor_after(cursor_offset))?;
136
137 Ok((cursor_buffer, cursor_anchor))
138}
139
140async fn setup_project(
141 example: &mut Example,
142 app_state: &Arc<EpAppState>,
143 step_progress: &StepProgress,
144 cx: &mut AsyncApp,
145) -> Result<Entity<Project>> {
146 let ep_store = cx
147 .update(|cx| EditPredictionStore::try_global(cx))?
148 .context("Store should be initialized at init")?;
149
150 let worktree_path = setup_worktree(example, step_progress).await?;
151
152 if let Some(project) = app_state.project_cache.get(&example.repository_url) {
153 ep_store.update(cx, |ep_store, _| {
154 ep_store.clear_history_for_project(&project);
155 })?;
156 let buffer_store = project.read_with(cx, |project, _| project.buffer_store().clone())?;
157 let buffers = buffer_store.read_with(cx, |buffer_store, _| {
158 buffer_store.buffers().collect::<Vec<_>>()
159 })?;
160 for buffer in buffers {
161 buffer
162 .update(cx, |buffer, cx| buffer.reload(cx))?
163 .await
164 .ok();
165 }
166 return Ok(project);
167 }
168
169 let project = cx.update(|cx| {
170 Project::local(
171 app_state.client.clone(),
172 app_state.node_runtime.clone(),
173 app_state.user_store.clone(),
174 app_state.languages.clone(),
175 app_state.fs.clone(),
176 None,
177 cx,
178 )
179 })?;
180
181 project
182 .update(cx, |project, cx| {
183 project.disable_worktree_scanner(cx);
184 project.create_worktree(&worktree_path, true, cx)
185 })?
186 .await?;
187
188 app_state
189 .project_cache
190 .insert(example.repository_url.clone(), project.clone());
191
192 let buffer_store = project.read_with(cx, |project, _| project.buffer_store().clone())?;
193 cx.subscribe(&buffer_store, {
194 let project = project.clone();
195 move |_, event, cx| match event {
196 BufferStoreEvent::BufferAdded(buffer) => {
197 ep_store.update(cx, |store, cx| store.register_buffer(&buffer, &project, cx));
198 }
199 _ => {}
200 }
201 })?
202 .detach();
203
204 Ok(project)
205}
206
207async fn setup_worktree(example: &Example, step_progress: &StepProgress) -> Result<PathBuf> {
208 let (repo_owner, repo_name) = example.repo_name().context("failed to get repo name")?;
209 let repo_dir = REPOS_DIR.join(repo_owner.as_ref()).join(repo_name.as_ref());
210 let worktree_path = WORKTREES_DIR
211 .join(repo_owner.as_ref())
212 .join(repo_name.as_ref());
213 let repo_lock = lock_repo(&repo_dir).await;
214
215 if !repo_dir.is_dir() {
216 step_progress.set_substatus(format!("cloning {}", repo_name));
217 fs::create_dir_all(&repo_dir)?;
218 run_git(&repo_dir, &["init"]).await?;
219 run_git(
220 &repo_dir,
221 &["remote", "add", "origin", &example.repository_url],
222 )
223 .await?;
224 }
225
226 // Resolve the example to a revision, fetching it if needed.
227 let revision = run_git(
228 &repo_dir,
229 &["rev-parse", &format!("{}^{{commit}}", example.revision)],
230 )
231 .await;
232 let revision = if let Ok(revision) = revision {
233 revision
234 } else {
235 step_progress.set_substatus("fetching");
236 if run_git(
237 &repo_dir,
238 &["fetch", "--depth", "1", "origin", &example.revision],
239 )
240 .await
241 .is_err()
242 {
243 run_git(&repo_dir, &["fetch", "origin"]).await?;
244 }
245 let revision = run_git(&repo_dir, &["rev-parse", "FETCH_HEAD"]).await?;
246 revision
247 };
248
249 // Create the worktree for this example if needed.
250 step_progress.set_substatus("preparing worktree");
251 if worktree_path.is_dir() {
252 run_git(&worktree_path, &["clean", "--force", "-d"]).await?;
253 run_git(&worktree_path, &["reset", "--hard", "HEAD"]).await?;
254 run_git(&worktree_path, &["checkout", revision.as_str()]).await?;
255 } else {
256 let worktree_path_string = worktree_path.to_string_lossy();
257 run_git(
258 &repo_dir,
259 &["branch", "-f", &example.name, revision.as_str()],
260 )
261 .await?;
262 run_git(
263 &repo_dir,
264 &[
265 "worktree",
266 "add",
267 "-f",
268 &worktree_path_string,
269 &example.name,
270 ],
271 )
272 .await?;
273 }
274 drop(repo_lock);
275
276 // Apply the uncommitted diff for this example.
277 if !example.uncommitted_diff.is_empty() {
278 step_progress.set_substatus("applying diff");
279 let mut apply_process = smol::process::Command::new("git")
280 .current_dir(&worktree_path)
281 .args(&["apply", "-"])
282 .stdin(std::process::Stdio::piped())
283 .spawn()?;
284
285 let mut stdin = apply_process.stdin.take().context("Failed to get stdin")?;
286 stdin.write_all(example.uncommitted_diff.as_bytes()).await?;
287 stdin.close().await?;
288 drop(stdin);
289
290 let apply_result = apply_process.output().await?;
291 anyhow::ensure!(
292 apply_result.status.success(),
293 "Failed to apply uncommitted diff patch with status: {}\nstderr:\n{}\nstdout:\n{}",
294 apply_result.status,
295 String::from_utf8_lossy(&apply_result.stderr),
296 String::from_utf8_lossy(&apply_result.stdout),
297 );
298 }
299
300 step_progress.clear_substatus();
301 Ok(worktree_path)
302}
303
304async fn apply_edit_history(
305 example: &Example,
306 project: &Entity<Project>,
307 cx: &mut AsyncApp,
308) -> Result<OpenedBuffers> {
309 edit_prediction::udiff::apply_diff(&example.edit_history, project, cx).await
310}
311
312thread_local! {
313 static REPO_LOCKS: RefCell<HashMap<PathBuf, Arc<Mutex<()>>>> = RefCell::new(HashMap::default());
314}
315
316#[must_use]
317pub async fn lock_repo(path: impl AsRef<Path>) -> OwnedMutexGuard<()> {
318 REPO_LOCKS
319 .with(|cell| {
320 cell.borrow_mut()
321 .entry(path.as_ref().to_path_buf())
322 .or_default()
323 .clone()
324 })
325 .lock_owned()
326 .await
327}
328
329async fn run_git(repo_path: &Path, args: &[&str]) -> Result<String> {
330 let output = smol::process::Command::new("git")
331 .current_dir(repo_path)
332 .args(args)
333 .output()
334 .await?;
335
336 anyhow::ensure!(
337 output.status.success(),
338 "`git {}` within `{}` failed with status: {}\nstderr:\n{}\nstdout:\n{}",
339 args.join(" "),
340 repo_path.display(),
341 output.status,
342 String::from_utf8_lossy(&output.stderr),
343 String::from_utf8_lossy(&output.stdout),
344 );
345 Ok(String::from_utf8(output.stdout)?.trim().to_string())
346}