1use anyhow::{Context as _, Result};
2use futures::{
3 AsyncBufReadExt as _, SinkExt as _,
4 channel::mpsc::{self},
5 io::BufReader,
6 stream::{SelectAll, StreamExt},
7};
8use gpui::{App, AppContext as _, Entity, EntityId, Task, Window};
9use jupyter_protocol::{
10 ExecutionState, JupyterKernelspec, JupyterMessage, JupyterMessageContent, KernelInfoReply,
11 connection_info::{ConnectionInfo, Transport},
12};
13use project::Fs;
14use runtimelib::dirs;
15use smol::{net::TcpListener, process::Command};
16use std::{
17 env,
18 fmt::Debug,
19 net::{IpAddr, Ipv4Addr, SocketAddr},
20 path::PathBuf,
21 sync::Arc,
22};
23use uuid::Uuid;
24
25use crate::Session;
26
27use super::RunningKernel;
28
29#[derive(Debug, Clone)]
30pub struct LocalKernelSpecification {
31 pub name: String,
32 pub path: PathBuf,
33 pub kernelspec: JupyterKernelspec,
34}
35
36impl PartialEq for LocalKernelSpecification {
37 fn eq(&self, other: &Self) -> bool {
38 self.name == other.name && self.path == other.path
39 }
40}
41
42impl Eq for LocalKernelSpecification {}
43
44impl LocalKernelSpecification {
45 #[must_use]
46 fn command(&self, connection_path: &PathBuf) -> Result<Command> {
47 let argv = &self.kernelspec.argv;
48
49 anyhow::ensure!(!argv.is_empty(), "Empty argv in kernelspec {}", self.name);
50 anyhow::ensure!(argv.len() >= 2, "Invalid argv in kernelspec {}", self.name);
51 anyhow::ensure!(
52 argv.iter().any(|arg| arg == "{connection_file}"),
53 "Missing 'connection_file' in argv in kernelspec {}",
54 self.name
55 );
56
57 let mut cmd = util::command::new_smol_command(&argv[0]);
58
59 for arg in &argv[1..] {
60 if arg == "{connection_file}" {
61 cmd.arg(connection_path);
62 } else {
63 cmd.arg(arg);
64 }
65 }
66
67 if let Some(env) = &self.kernelspec.env {
68 cmd.envs(env);
69 }
70
71 Ok(cmd)
72 }
73}
74
75// Find a set of open ports. This creates a listener with port set to 0. The listener will be closed at the end when it goes out of scope.
76// There's a race condition between closing the ports and usage by a kernel, but it's inherent to the Jupyter protocol.
77async fn peek_ports(ip: IpAddr) -> Result<[u16; 5]> {
78 let mut addr_zeroport: SocketAddr = SocketAddr::new(ip, 0);
79 addr_zeroport.set_port(0);
80 let mut ports: [u16; 5] = [0; 5];
81 for i in 0..5 {
82 let listener = TcpListener::bind(addr_zeroport).await?;
83 let addr = listener.local_addr()?;
84 ports[i] = addr.port();
85 }
86 Ok(ports)
87}
88
89pub struct NativeRunningKernel {
90 pub process: smol::process::Child,
91 _shell_task: Task<Result<()>>,
92 _control_task: Task<Result<()>>,
93 _routing_task: Task<Result<()>>,
94 connection_path: PathBuf,
95 _process_status_task: Option<Task<()>>,
96 pub working_directory: PathBuf,
97 pub request_tx: mpsc::Sender<JupyterMessage>,
98 pub execution_state: ExecutionState,
99 pub kernel_info: Option<KernelInfoReply>,
100}
101
102impl Debug for NativeRunningKernel {
103 fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
104 f.debug_struct("RunningKernel")
105 .field("process", &self.process)
106 .finish()
107 }
108}
109
110impl NativeRunningKernel {
111 pub fn new(
112 kernel_specification: LocalKernelSpecification,
113 entity_id: EntityId,
114 working_directory: PathBuf,
115 fs: Arc<dyn Fs>,
116 // todo: convert to weak view
117 session: Entity<Session>,
118 window: &mut Window,
119 cx: &mut App,
120 ) -> Task<Result<Box<dyn RunningKernel>>> {
121 window.spawn(cx, async move |cx| {
122 let ip = IpAddr::V4(Ipv4Addr::new(127, 0, 0, 1));
123 let ports = peek_ports(ip).await?;
124
125 let connection_info = ConnectionInfo {
126 transport: Transport::TCP,
127 ip: ip.to_string(),
128 stdin_port: ports[0],
129 control_port: ports[1],
130 hb_port: ports[2],
131 shell_port: ports[3],
132 iopub_port: ports[4],
133 signature_scheme: "hmac-sha256".to_string(),
134 key: uuid::Uuid::new_v4().to_string(),
135 kernel_name: Some(format!("zed-{}", kernel_specification.name)),
136 };
137
138 let runtime_dir = dirs::runtime_dir();
139 fs.create_dir(&runtime_dir)
140 .await
141 .with_context(|| format!("Failed to create jupyter runtime dir {runtime_dir:?}"))?;
142 let connection_path = runtime_dir.join(format!("kernel-zed-{entity_id}.json"));
143 let content = serde_json::to_string(&connection_info)?;
144 fs.atomic_write(connection_path.clone(), content).await?;
145
146 let mut cmd = kernel_specification.command(&connection_path)?;
147
148 let mut process = cmd
149 .current_dir(&working_directory)
150 .stdout(std::process::Stdio::piped())
151 .stderr(std::process::Stdio::piped())
152 .stdin(std::process::Stdio::piped())
153 .kill_on_drop(true)
154 .spawn()
155 .context("failed to start the kernel process")?;
156
157 let session_id = Uuid::new_v4().to_string();
158
159 let mut iopub_socket =
160 runtimelib::create_client_iopub_connection(&connection_info, "", &session_id)
161 .await?;
162 let mut shell_socket =
163 runtimelib::create_client_shell_connection(&connection_info, &session_id).await?;
164 let mut control_socket =
165 runtimelib::create_client_control_connection(&connection_info, &session_id).await?;
166
167 let (request_tx, mut request_rx) =
168 futures::channel::mpsc::channel::<JupyterMessage>(100);
169
170 let (mut control_reply_tx, control_reply_rx) = futures::channel::mpsc::channel(100);
171 let (mut shell_reply_tx, shell_reply_rx) = futures::channel::mpsc::channel(100);
172
173 let mut messages_rx = SelectAll::new();
174 messages_rx.push(control_reply_rx);
175 messages_rx.push(shell_reply_rx);
176
177 cx.spawn({
178 let session = session.clone();
179
180 async move |cx| {
181 while let Some(message) = messages_rx.next().await {
182 session
183 .update_in(cx, |session, window, cx| {
184 session.route(&message, window, cx);
185 })
186 .ok();
187 }
188 anyhow::Ok(())
189 }
190 })
191 .detach();
192
193 // iopub task
194 cx.spawn({
195 let session = session.clone();
196
197 async move |cx| {
198 while let Ok(message) = iopub_socket.read().await {
199 session
200 .update_in(cx, |session, window, cx| {
201 session.route(&message, window, cx);
202 })
203 .ok();
204 }
205 anyhow::Ok(())
206 }
207 })
208 .detach();
209
210 let (mut control_request_tx, mut control_request_rx) =
211 futures::channel::mpsc::channel(100);
212 let (mut shell_request_tx, mut shell_request_rx) = futures::channel::mpsc::channel(100);
213
214 let routing_task = cx.background_spawn({
215 async move {
216 while let Some(message) = request_rx.next().await {
217 match message.content {
218 JupyterMessageContent::DebugRequest(_)
219 | JupyterMessageContent::InterruptRequest(_)
220 | JupyterMessageContent::ShutdownRequest(_) => {
221 control_request_tx.send(message).await?;
222 }
223 _ => {
224 shell_request_tx.send(message).await?;
225 }
226 }
227 }
228 anyhow::Ok(())
229 }
230 });
231
232 let shell_task = cx.background_spawn({
233 async move {
234 while let Some(message) = shell_request_rx.next().await {
235 shell_socket.send(message).await.ok();
236 let reply = shell_socket.read().await?;
237 shell_reply_tx.send(reply).await?;
238 }
239 anyhow::Ok(())
240 }
241 });
242
243 let control_task = cx.background_spawn({
244 async move {
245 while let Some(message) = control_request_rx.next().await {
246 control_socket.send(message).await.ok();
247 let reply = control_socket.read().await?;
248 control_reply_tx.send(reply).await?;
249 }
250 anyhow::Ok(())
251 }
252 });
253
254 let stderr = process.stderr.take();
255
256 cx.spawn(async move |_cx| {
257 if stderr.is_none() {
258 return;
259 }
260 let reader = BufReader::new(stderr.unwrap());
261 let mut lines = reader.lines();
262 while let Some(Ok(line)) = lines.next().await {
263 log::error!("kernel: {}", line);
264 }
265 })
266 .detach();
267
268 let stdout = process.stdout.take();
269
270 cx.spawn(async move |_cx| {
271 if stdout.is_none() {
272 return;
273 }
274 let reader = BufReader::new(stdout.unwrap());
275 let mut lines = reader.lines();
276 while let Some(Ok(line)) = lines.next().await {
277 log::info!("kernel: {}", line);
278 }
279 })
280 .detach();
281
282 let status = process.status();
283
284 let process_status_task = cx.spawn(async move |cx| {
285 let error_message = match status.await {
286 Ok(status) => {
287 if status.success() {
288 log::info!("kernel process exited successfully");
289 return;
290 }
291
292 format!("kernel process exited with status: {:?}", status)
293 }
294 Err(err) => {
295 format!("kernel process exited with error: {:?}", err)
296 }
297 };
298
299 log::error!("{}", error_message);
300
301 session
302 .update(cx, |session, cx| {
303 session.kernel_errored(error_message, cx);
304
305 cx.notify();
306 })
307 .ok();
308 });
309
310 anyhow::Ok(Box::new(Self {
311 process,
312 request_tx,
313 working_directory,
314 _process_status_task: Some(process_status_task),
315 _shell_task: shell_task,
316 _control_task: control_task,
317 _routing_task: routing_task,
318 connection_path,
319 execution_state: ExecutionState::Idle,
320 kernel_info: None,
321 }) as Box<dyn RunningKernel>)
322 })
323 }
324}
325
326impl RunningKernel for NativeRunningKernel {
327 fn request_tx(&self) -> mpsc::Sender<JupyterMessage> {
328 self.request_tx.clone()
329 }
330
331 fn working_directory(&self) -> &PathBuf {
332 &self.working_directory
333 }
334
335 fn execution_state(&self) -> &ExecutionState {
336 &self.execution_state
337 }
338
339 fn set_execution_state(&mut self, state: ExecutionState) {
340 self.execution_state = state;
341 }
342
343 fn kernel_info(&self) -> Option<&KernelInfoReply> {
344 self.kernel_info.as_ref()
345 }
346
347 fn set_kernel_info(&mut self, info: KernelInfoReply) {
348 self.kernel_info = Some(info);
349 }
350
351 fn force_shutdown(&mut self, _window: &mut Window, _cx: &mut App) -> Task<anyhow::Result<()>> {
352 self._process_status_task.take();
353 self.request_tx.close_channel();
354 Task::ready(self.process.kill().context("killing the kernel process"))
355 }
356}
357
358impl Drop for NativeRunningKernel {
359 fn drop(&mut self) {
360 std::fs::remove_file(&self.connection_path).ok();
361 self.request_tx.close_channel();
362 self.process.kill().ok();
363 }
364}
365
366async fn read_kernelspec_at(
367 // Path should be a directory to a jupyter kernelspec, as in
368 // /usr/local/share/jupyter/kernels/python3
369 kernel_dir: PathBuf,
370 fs: &dyn Fs,
371) -> Result<LocalKernelSpecification> {
372 let path = kernel_dir;
373 let kernel_name = if let Some(kernel_name) = path.file_name() {
374 kernel_name.to_string_lossy().into_owned()
375 } else {
376 anyhow::bail!("Invalid kernelspec directory: {path:?}");
377 };
378
379 if !fs.is_dir(path.as_path()).await {
380 anyhow::bail!("Not a directory: {path:?}");
381 }
382
383 let expected_kernel_json = path.join("kernel.json");
384 let spec = fs.load(expected_kernel_json.as_path()).await?;
385 let spec = serde_json::from_str::<JupyterKernelspec>(&spec)?;
386
387 Ok(LocalKernelSpecification {
388 name: kernel_name,
389 path,
390 kernelspec: spec,
391 })
392}
393
394/// Read a directory of kernelspec directories
395async fn read_kernels_dir(path: PathBuf, fs: &dyn Fs) -> Result<Vec<LocalKernelSpecification>> {
396 let mut kernelspec_dirs = fs.read_dir(&path).await?;
397
398 let mut valid_kernelspecs = Vec::new();
399 while let Some(path) = kernelspec_dirs.next().await {
400 match path {
401 Ok(path) => {
402 if fs.is_dir(path.as_path()).await
403 && let Ok(kernelspec) = read_kernelspec_at(path, fs).await
404 {
405 valid_kernelspecs.push(kernelspec);
406 }
407 }
408 Err(err) => log::warn!("Error reading kernelspec directory: {err:?}"),
409 }
410 }
411
412 Ok(valid_kernelspecs)
413}
414
415pub async fn local_kernel_specifications(fs: Arc<dyn Fs>) -> Result<Vec<LocalKernelSpecification>> {
416 let mut data_dirs = dirs::data_dirs();
417
418 // Pick up any kernels from conda or conda environment
419 if let Ok(conda_prefix) = env::var("CONDA_PREFIX") {
420 let conda_prefix = PathBuf::from(conda_prefix);
421 let conda_data_dir = conda_prefix.join("share").join("jupyter");
422 data_dirs.push(conda_data_dir);
423 }
424
425 // Search for kernels inside the base python environment
426 let command = util::command::new_smol_command("python")
427 .arg("-c")
428 .arg("import sys; print(sys.prefix)")
429 .output()
430 .await;
431
432 if let Ok(command) = command
433 && command.status.success()
434 {
435 let python_prefix = String::from_utf8(command.stdout);
436 if let Ok(python_prefix) = python_prefix {
437 let python_prefix = PathBuf::from(python_prefix.trim());
438 let python_data_dir = python_prefix.join("share").join("jupyter");
439 data_dirs.push(python_data_dir);
440 }
441 }
442
443 let kernel_dirs = data_dirs
444 .iter()
445 .map(|dir| dir.join("kernels"))
446 .map(|path| read_kernels_dir(path, fs.as_ref()))
447 .collect::<Vec<_>>();
448
449 let kernel_dirs = futures::future::join_all(kernel_dirs).await;
450 let kernel_dirs = kernel_dirs
451 .into_iter()
452 .filter_map(Result::ok)
453 .flatten()
454 .collect::<Vec<_>>();
455
456 Ok(kernel_dirs)
457}
458
459#[cfg(test)]
460mod test {
461 use super::*;
462 use std::path::PathBuf;
463
464 use gpui::TestAppContext;
465 use project::FakeFs;
466 use serde_json::json;
467
468 #[gpui::test]
469 async fn test_get_kernelspecs(cx: &mut TestAppContext) {
470 let fs = FakeFs::new(cx.executor());
471 fs.insert_tree(
472 "/jupyter",
473 json!({
474 ".zed": {
475 "settings.json": r#"{ "tab_size": 8 }"#,
476 "tasks.json": r#"[{
477 "label": "cargo check",
478 "command": "cargo",
479 "args": ["check", "--all"]
480 },]"#,
481 },
482 "kernels": {
483 "python": {
484 "kernel.json": r#"{
485 "display_name": "Python 3",
486 "language": "python",
487 "argv": ["python3", "-m", "ipykernel_launcher", "-f", "{connection_file}"],
488 "env": {}
489 }"#
490 },
491 "deno": {
492 "kernel.json": r#"{
493 "display_name": "Deno",
494 "language": "typescript",
495 "argv": ["deno", "run", "--unstable", "--allow-net", "--allow-read", "https://deno.land/std/http/file_server.ts", "{connection_file}"],
496 "env": {}
497 }"#
498 }
499 },
500 }),
501 )
502 .await;
503
504 let mut kernels = read_kernels_dir(PathBuf::from("/jupyter/kernels"), fs.as_ref())
505 .await
506 .unwrap();
507
508 kernels.sort_by(|a, b| a.name.cmp(&b.name));
509
510 assert_eq!(
511 kernels.iter().map(|c| c.name.clone()).collect::<Vec<_>>(),
512 vec!["deno", "python"]
513 );
514 }
515}