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bf07604113
This commit adds "deno jupyter" subcommand which provides a Deno kernel for Jupyter notebooks. The implementation is mostly based on Deno's REPL and reuses large parts of it (though there's some clean up that needs to happen in follow up PRs). Not all functionality of Jupyter kernel is implemented and some message type are still not implemented (eg. "inspect_request") but the kernel is fully working and provides all the capatibilities that the Deno REPL has; including TypeScript transpilation and npm packages support. Closes https://github.com/denoland/deno/issues/13016 --------- Co-authored-by: Adam Powers <apowers@ato.ms> Co-authored-by: Kyle Kelley <rgbkrk@gmail.com>
216 lines
6.8 KiB
Rust
216 lines
6.8 KiB
Rust
// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
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use crate::args::CliOptions;
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use crate::args::Flags;
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use crate::args::ReplFlags;
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use crate::colors;
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use crate::factory::CliFactory;
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use crate::file_fetcher::FileFetcher;
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use deno_core::error::AnyError;
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use deno_core::futures::StreamExt;
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use deno_core::unsync::spawn_blocking;
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use deno_runtime::permissions::Permissions;
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use deno_runtime::permissions::PermissionsContainer;
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use rustyline::error::ReadlineError;
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pub(crate) mod cdp;
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mod channel;
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mod editor;
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mod session;
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use channel::rustyline_channel;
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use channel::RustylineSyncMessage;
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use channel::RustylineSyncMessageHandler;
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use channel::RustylineSyncResponse;
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use editor::EditorHelper;
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use editor::ReplEditor;
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pub use session::EvaluationOutput;
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pub use session::ReplSession;
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pub use session::REPL_INTERNALS_NAME;
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#[allow(clippy::await_holding_refcell_ref)]
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async fn read_line_and_poll(
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repl_session: &mut ReplSession,
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message_handler: &mut RustylineSyncMessageHandler,
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editor: ReplEditor,
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) -> Result<String, ReadlineError> {
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let mut line_fut = spawn_blocking(move || editor.readline());
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let mut poll_worker = true;
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let notifications_rc = repl_session.notifications.clone();
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let mut notifications = notifications_rc.borrow_mut();
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loop {
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tokio::select! {
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result = &mut line_fut => {
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return result.unwrap();
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}
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result = message_handler.recv() => {
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match result {
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Some(RustylineSyncMessage::PostMessage { method, params }) => {
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let result = repl_session
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.post_message_with_event_loop(&method, params)
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.await;
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message_handler.send(RustylineSyncResponse::PostMessage(result)).unwrap();
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},
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Some(RustylineSyncMessage::LspCompletions {
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line_text,
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position,
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}) => {
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let result = repl_session.language_server.completions(&line_text, position).await;
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message_handler.send(RustylineSyncResponse::LspCompletions(result)).unwrap();
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}
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None => {}, // channel closed
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}
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poll_worker = true;
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}
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message = notifications.next() => {
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if let Some(message) = message {
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let method = message.get("method").unwrap().as_str().unwrap();
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if method == "Runtime.exceptionThrown" {
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let params = message.get("params").unwrap().as_object().unwrap();
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let exception_details = params.get("exceptionDetails").unwrap().as_object().unwrap();
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let text = exception_details.get("text").unwrap().as_str().unwrap();
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let exception = exception_details.get("exception").unwrap().as_object().unwrap();
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let description = exception.get("description").and_then(|d| d.as_str()).unwrap_or("undefined");
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println!("{text} {description}");
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}
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}
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}
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_ = repl_session.run_event_loop(), if poll_worker => {
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poll_worker = false;
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}
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}
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}
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}
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async fn read_eval_file(
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cli_options: &CliOptions,
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file_fetcher: &FileFetcher,
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eval_file: &str,
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) -> Result<String, AnyError> {
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let specifier =
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deno_core::resolve_url_or_path(eval_file, cli_options.initial_cwd())?;
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let file = file_fetcher
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.fetch(&specifier, PermissionsContainer::allow_all())
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.await?;
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Ok((*file.source).to_string())
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}
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pub async fn run(flags: Flags, repl_flags: ReplFlags) -> Result<i32, AnyError> {
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let factory = CliFactory::from_flags(flags).await?;
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let cli_options = factory.cli_options();
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let main_module = cli_options.resolve_main_module()?;
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let permissions = PermissionsContainer::new(Permissions::from_options(
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&cli_options.permissions_options(),
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)?);
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let npm_resolver = factory.npm_resolver().await?.clone();
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let resolver = factory.resolver().await?.clone();
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let file_fetcher = factory.file_fetcher()?;
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let worker_factory = factory.create_cli_main_worker_factory().await?;
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let history_file_path = factory
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.deno_dir()
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.ok()
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.and_then(|dir| dir.repl_history_file_path());
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let mut worker = worker_factory
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.create_main_worker(main_module, permissions)
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.await?;
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worker.setup_repl().await?;
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let worker = worker.into_main_worker();
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let mut repl_session =
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ReplSession::initialize(cli_options, npm_resolver, resolver, worker)
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.await?;
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let mut rustyline_channel = rustyline_channel();
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let helper = EditorHelper {
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context_id: repl_session.context_id,
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sync_sender: rustyline_channel.0,
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};
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let editor = ReplEditor::new(helper, history_file_path)?;
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if let Some(eval_files) = repl_flags.eval_files {
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for eval_file in eval_files {
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match read_eval_file(cli_options, file_fetcher, &eval_file).await {
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Ok(eval_source) => {
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let output = repl_session
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.evaluate_line_and_get_output(&eval_source)
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.await;
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// only output errors
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if let EvaluationOutput::Error(error_text) = output {
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println!("Error in --eval-file file \"{eval_file}\": {error_text}");
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}
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}
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Err(e) => {
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println!("Error in --eval-file file \"{eval_file}\": {e}");
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}
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}
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}
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}
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if let Some(eval) = repl_flags.eval {
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let output = repl_session.evaluate_line_and_get_output(&eval).await;
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// only output errors
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if let EvaluationOutput::Error(error_text) = output {
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println!("Error in --eval flag: {error_text}");
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}
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}
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// Doing this manually, instead of using `log::info!` because these messages
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// are supposed to go to stdout, not stderr.
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if !cli_options.is_quiet() {
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println!("Deno {}", crate::version::deno());
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println!("exit using ctrl+d, ctrl+c, or close()");
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if repl_flags.is_default_command {
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println!(
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"{}",
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colors::yellow("REPL is running with all permissions allowed.")
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);
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println!("To specify permissions, run `deno repl` with allow flags.")
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}
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}
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loop {
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let line = read_line_and_poll(
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&mut repl_session,
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&mut rustyline_channel.1,
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editor.clone(),
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)
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.await;
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match line {
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Ok(line) => {
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editor.set_should_exit_on_interrupt(false);
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editor.update_history(line.clone());
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let output = repl_session.evaluate_line_and_get_output(&line).await;
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// We check for close and break here instead of making it a loop condition to get
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// consistent behavior in when the user evaluates a call to close().
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if repl_session.closing().await? {
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break;
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}
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println!("{output}");
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}
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Err(ReadlineError::Interrupted) => {
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if editor.should_exit_on_interrupt() {
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break;
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}
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editor.set_should_exit_on_interrupt(true);
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println!("press ctrl+c again to exit");
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continue;
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}
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Err(ReadlineError::Eof) => {
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break;
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}
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Err(err) => {
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println!("Error: {err:?}");
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break;
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}
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}
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}
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Ok(repl_session.worker.exit_code())
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}
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