mirror of
https://github.com/denoland/deno
synced 2024-08-27 20:09:17 +00:00
![Matt Mastracci](/assets/img/avatar_default.png)
By default, `deno serve` will assign port 8000 (like `Deno.serve`). Users may choose a different port using `--port`. `deno serve /tmp/file.ts` `server.ts`: ```ts export default { fetch(req) { return new Response("hello world!\n"); }, }; ```
253 lines
7.4 KiB
Rust
253 lines
7.4 KiB
Rust
// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
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use std::sync::Arc;
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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::cdp;
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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::serde_json;
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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 deno_runtime::WorkerExecutionMode;
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use rustyline::error::ReadlineError;
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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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use super::test::create_single_test_event_channel;
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struct Repl {
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session: ReplSession,
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editor: ReplEditor,
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message_handler: RustylineSyncMessageHandler,
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}
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impl Repl {
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async fn run(&mut self) -> Result<(), AnyError> {
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loop {
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let line = read_line_and_poll(
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&mut self.session,
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&mut self.message_handler,
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self.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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self.editor.set_should_exit_on_interrupt(false);
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self.editor.update_history(line.clone());
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let output = self.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 self.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 self.editor.should_exit_on_interrupt() {
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break;
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}
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self.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(())
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}
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}
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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.lock().await;
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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 notification: cdp::Notification = serde_json::from_value(message).unwrap();
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if notification.method == "Runtime.exceptionThrown" {
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let exception_thrown: cdp::ExceptionThrown = serde_json::from_value(notification.params).unwrap();
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let (message, description) = exception_thrown.exception_details.get_message_and_description();
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println!("{} {}", message, 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<Arc<str>, 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.into_text_decoded()?.source)
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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)?;
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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 (worker, test_event_receiver) = create_single_test_event_channel();
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let test_event_sender = worker.sender;
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let mut worker = worker_factory
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.create_custom_worker(
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WorkerExecutionMode::Repl,
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main_module.clone(),
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permissions,
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vec![crate::ops::testing::deno_test::init_ops(test_event_sender)],
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Default::default(),
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)
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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 session = ReplSession::initialize(
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cli_options,
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npm_resolver,
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resolver,
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worker,
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main_module,
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test_event_receiver,
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)
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.await?;
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let rustyline_channel = rustyline_channel();
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let helper = EditorHelper {
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context_id: 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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let mut repl = Repl {
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session,
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editor,
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message_handler: rustyline_channel.1,
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};
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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
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.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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repl.run().await?;
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Ok(repl.session.worker.exit_code())
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}
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