1use crate::AgentServerCommand;
2use acp_thread::AgentConnection;
3use acp_tools::AcpConnectionRegistry;
4use action_log::ActionLog;
5use agent_client_protocol::{self as acp, Agent as _, ErrorCode};
6use anyhow::anyhow;
7use collections::HashMap;
8use futures::AsyncBufReadExt as _;
9use futures::channel::oneshot;
10use futures::io::BufReader;
11use project::Project;
12use serde::Deserialize;
13use std::{any::Any, cell::RefCell};
14use std::{path::Path, rc::Rc};
15use thiserror::Error;
16
17use anyhow::{Context as _, Result};
18use gpui::{App, AppContext as _, AsyncApp, Entity, Task, WeakEntity};
19
20use acp_thread::{AcpThread, AuthRequired, LoadError};
21
22#[derive(Debug, Error)]
23#[error("Unsupported version")]
24pub struct UnsupportedVersion;
25
26pub struct AcpConnection {
27 server_name: &'static str,
28 connection: Rc<acp::ClientSideConnection>,
29 sessions: Rc<RefCell<HashMap<acp::SessionId, AcpSession>>>,
30 auth_methods: Vec<acp::AuthMethod>,
31 prompt_capabilities: acp::PromptCapabilities,
32 _io_task: Task<Result<()>>,
33}
34
35pub struct AcpSession {
36 thread: WeakEntity<AcpThread>,
37 suppress_abort_err: bool,
38}
39
40pub async fn connect(
41 server_name: &'static str,
42 command: AgentServerCommand,
43 root_dir: &Path,
44 cx: &mut AsyncApp,
45) -> Result<Rc<dyn AgentConnection>> {
46 let conn = AcpConnection::stdio(server_name, command.clone(), root_dir, cx).await?;
47 Ok(Rc::new(conn) as _)
48}
49
50const MINIMUM_SUPPORTED_VERSION: acp::ProtocolVersion = acp::V1;
51
52impl AcpConnection {
53 pub async fn stdio(
54 server_name: &'static str,
55 command: AgentServerCommand,
56 root_dir: &Path,
57 cx: &mut AsyncApp,
58 ) -> Result<Self> {
59 let mut child = util::command::new_smol_command(&command.path)
60 .args(command.args.iter().map(|arg| arg.as_str()))
61 .envs(command.env.iter().flatten())
62 .current_dir(root_dir)
63 .stdin(std::process::Stdio::piped())
64 .stdout(std::process::Stdio::piped())
65 .stderr(std::process::Stdio::piped())
66 .kill_on_drop(true)
67 .spawn()?;
68
69 let stdout = child.stdout.take().context("Failed to take stdout")?;
70 let stdin = child.stdin.take().context("Failed to take stdin")?;
71 let stderr = child.stderr.take().context("Failed to take stderr")?;
72 log::trace!("Spawned (pid: {})", child.id());
73
74 let sessions = Rc::new(RefCell::new(HashMap::default()));
75
76 let client = ClientDelegate {
77 sessions: sessions.clone(),
78 cx: cx.clone(),
79 };
80 let (connection, io_task) = acp::ClientSideConnection::new(client, stdin, stdout, {
81 let foreground_executor = cx.foreground_executor().clone();
82 move |fut| {
83 foreground_executor.spawn(fut).detach();
84 }
85 });
86
87 let io_task = cx.background_spawn(io_task);
88
89 cx.background_spawn(async move {
90 let mut stderr = BufReader::new(stderr);
91 let mut line = String::new();
92 while let Ok(n) = stderr.read_line(&mut line).await
93 && n > 0
94 {
95 log::warn!("agent stderr: {}", &line);
96 line.clear();
97 }
98 })
99 .detach();
100
101 cx.spawn({
102 let sessions = sessions.clone();
103 async move |cx| {
104 let status = child.status().await?;
105
106 for session in sessions.borrow().values() {
107 session
108 .thread
109 .update(cx, |thread, cx| {
110 thread.emit_load_error(LoadError::Exited { status }, cx)
111 })
112 .ok();
113 }
114
115 anyhow::Ok(())
116 }
117 })
118 .detach();
119
120 let connection = Rc::new(connection);
121
122 cx.update(|cx| {
123 AcpConnectionRegistry::default_global(cx).update(cx, |registry, cx| {
124 registry.set_active_connection(server_name, &connection, cx)
125 });
126 })?;
127
128 let response = connection
129 .initialize(acp::InitializeRequest {
130 protocol_version: acp::VERSION,
131 client_capabilities: acp::ClientCapabilities {
132 fs: acp::FileSystemCapability {
133 read_text_file: true,
134 write_text_file: true,
135 },
136 },
137 })
138 .await?;
139
140 if response.protocol_version < MINIMUM_SUPPORTED_VERSION {
141 return Err(UnsupportedVersion.into());
142 }
143
144 Ok(Self {
145 auth_methods: response.auth_methods,
146 connection,
147 server_name,
148 sessions,
149 prompt_capabilities: response.agent_capabilities.prompt_capabilities,
150 _io_task: io_task,
151 })
152 }
153}
154
155impl AgentConnection for AcpConnection {
156 fn new_thread(
157 self: Rc<Self>,
158 project: Entity<Project>,
159 cwd: &Path,
160 cx: &mut App,
161 ) -> Task<Result<Entity<AcpThread>>> {
162 let conn = self.connection.clone();
163 let sessions = self.sessions.clone();
164 let cwd = cwd.to_path_buf();
165 cx.spawn(async move |cx| {
166 let response = conn
167 .new_session(acp::NewSessionRequest {
168 mcp_servers: vec![],
169 cwd,
170 })
171 .await
172 .map_err(|err| {
173 if err.code == acp::ErrorCode::AUTH_REQUIRED.code {
174 let mut error = AuthRequired::new();
175
176 if err.message != acp::ErrorCode::AUTH_REQUIRED.message {
177 error = error.with_description(err.message);
178 }
179
180 anyhow!(error)
181 } else {
182 anyhow!(err)
183 }
184 })?;
185
186 let session_id = response.session_id;
187 let action_log = cx.new(|_| ActionLog::new(project.clone()))?;
188 let thread = cx.new(|_cx| {
189 AcpThread::new(
190 self.server_name,
191 self.clone(),
192 project,
193 action_log,
194 session_id.clone(),
195 )
196 })?;
197
198 let session = AcpSession {
199 thread: thread.downgrade(),
200 suppress_abort_err: false,
201 };
202 sessions.borrow_mut().insert(session_id, session);
203
204 Ok(thread)
205 })
206 }
207
208 fn auth_methods(&self) -> &[acp::AuthMethod] {
209 &self.auth_methods
210 }
211
212 fn authenticate(&self, method_id: acp::AuthMethodId, cx: &mut App) -> Task<Result<()>> {
213 let conn = self.connection.clone();
214 cx.foreground_executor().spawn(async move {
215 let result = conn
216 .authenticate(acp::AuthenticateRequest {
217 method_id: method_id.clone(),
218 })
219 .await?;
220
221 Ok(result)
222 })
223 }
224
225 fn prompt(
226 &self,
227 _id: Option<acp_thread::UserMessageId>,
228 params: acp::PromptRequest,
229 cx: &mut App,
230 ) -> Task<Result<acp::PromptResponse>> {
231 let conn = self.connection.clone();
232 let sessions = self.sessions.clone();
233 let session_id = params.session_id.clone();
234 cx.foreground_executor().spawn(async move {
235 let result = conn.prompt(params).await;
236
237 let mut suppress_abort_err = false;
238
239 if let Some(session) = sessions.borrow_mut().get_mut(&session_id) {
240 suppress_abort_err = session.suppress_abort_err;
241 session.suppress_abort_err = false;
242 }
243
244 match result {
245 Ok(response) => Ok(response),
246 Err(err) => {
247 if err.code != ErrorCode::INTERNAL_ERROR.code {
248 anyhow::bail!(err)
249 }
250
251 let Some(data) = &err.data else {
252 anyhow::bail!(err)
253 };
254
255 // Temporary workaround until the following PR is generally available:
256 // https://github.com/google-gemini/gemini-cli/pull/6656
257
258 #[derive(Deserialize)]
259 #[serde(deny_unknown_fields)]
260 struct ErrorDetails {
261 details: Box<str>,
262 }
263
264 match serde_json::from_value(data.clone()) {
265 Ok(ErrorDetails { details }) => {
266 if suppress_abort_err && details.contains("This operation was aborted")
267 {
268 Ok(acp::PromptResponse {
269 stop_reason: acp::StopReason::Cancelled,
270 })
271 } else {
272 Err(anyhow!(details))
273 }
274 }
275 Err(_) => Err(anyhow!(err)),
276 }
277 }
278 }
279 })
280 }
281
282 fn prompt_capabilities(&self) -> acp::PromptCapabilities {
283 self.prompt_capabilities
284 }
285
286 fn cancel(&self, session_id: &acp::SessionId, cx: &mut App) {
287 if let Some(session) = self.sessions.borrow_mut().get_mut(session_id) {
288 session.suppress_abort_err = true;
289 }
290 let conn = self.connection.clone();
291 let params = acp::CancelNotification {
292 session_id: session_id.clone(),
293 };
294 cx.foreground_executor()
295 .spawn(async move { conn.cancel(params).await })
296 .detach();
297 }
298
299 fn into_any(self: Rc<Self>) -> Rc<dyn Any> {
300 self
301 }
302}
303
304struct ClientDelegate {
305 sessions: Rc<RefCell<HashMap<acp::SessionId, AcpSession>>>,
306 cx: AsyncApp,
307}
308
309impl acp::Client for ClientDelegate {
310 async fn request_permission(
311 &self,
312 arguments: acp::RequestPermissionRequest,
313 ) -> Result<acp::RequestPermissionResponse, acp::Error> {
314 let cx = &mut self.cx.clone();
315 let rx = self
316 .sessions
317 .borrow()
318 .get(&arguments.session_id)
319 .context("Failed to get session")?
320 .thread
321 .update(cx, |thread, cx| {
322 thread.request_tool_call_authorization(arguments.tool_call, arguments.options, cx)
323 })?;
324
325 let result = rx?.await;
326
327 let outcome = match result {
328 Ok(option) => acp::RequestPermissionOutcome::Selected { option_id: option },
329 Err(oneshot::Canceled) => acp::RequestPermissionOutcome::Cancelled,
330 };
331
332 Ok(acp::RequestPermissionResponse { outcome })
333 }
334
335 async fn write_text_file(
336 &self,
337 arguments: acp::WriteTextFileRequest,
338 ) -> Result<(), acp::Error> {
339 let cx = &mut self.cx.clone();
340 let task = self
341 .sessions
342 .borrow()
343 .get(&arguments.session_id)
344 .context("Failed to get session")?
345 .thread
346 .update(cx, |thread, cx| {
347 thread.write_text_file(arguments.path, arguments.content, cx)
348 })?;
349
350 task.await?;
351
352 Ok(())
353 }
354
355 async fn read_text_file(
356 &self,
357 arguments: acp::ReadTextFileRequest,
358 ) -> Result<acp::ReadTextFileResponse, acp::Error> {
359 let cx = &mut self.cx.clone();
360 let task = self
361 .sessions
362 .borrow()
363 .get(&arguments.session_id)
364 .context("Failed to get session")?
365 .thread
366 .update(cx, |thread, cx| {
367 thread.read_text_file(arguments.path, arguments.line, arguments.limit, false, cx)
368 })?;
369
370 let content = task.await?;
371
372 Ok(acp::ReadTextFileResponse { content })
373 }
374
375 async fn session_notification(
376 &self,
377 notification: acp::SessionNotification,
378 ) -> Result<(), acp::Error> {
379 let cx = &mut self.cx.clone();
380 let sessions = self.sessions.borrow();
381 let session = sessions
382 .get(¬ification.session_id)
383 .context("Failed to get session")?;
384
385 session.thread.update(cx, |thread, cx| {
386 thread.handle_session_update(notification.update, cx)
387 })??;
388
389 Ok(())
390 }
391}