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main.rs
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main.rs
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// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
mod args;
mod auth_tokens;
mod cache;
mod cdp;
mod emit;
mod errors;
mod factory;
mod file_fetcher;
mod graph_util;
mod http_util;
mod js;
mod jsr;
mod lsp;
mod module_loader;
mod napi;
mod node;
mod npm;
mod ops;
mod resolver;
mod standalone;
mod tools;
mod tsc;
mod util;
mod version;
mod worker;
use crate::args::flags_from_vec;
use crate::args::DenoSubcommand;
use crate::args::Flags;
use crate::args::DENO_FUTURE;
use crate::util::display;
use crate::util::v8::get_v8_flags_from_env;
use crate::util::v8::init_v8_flags;
use deno_runtime::WorkerExecutionMode;
pub use deno_runtime::UNSTABLE_GRANULAR_FLAGS;
use deno_core::anyhow::Context;
use deno_core::error::AnyError;
use deno_core::error::JsError;
use deno_core::futures::FutureExt;
use deno_core::unsync::JoinHandle;
use deno_npm::resolution::SnapshotFromLockfileError;
use deno_runtime::fmt_errors::format_js_error;
use deno_runtime::tokio_util::create_and_run_current_thread_with_maybe_metrics;
use deno_terminal::colors;
use factory::CliFactory;
use std::borrow::Cow;
use std::env;
use std::env::current_exe;
use std::future::Future;
use std::path::PathBuf;
/// Ensures that all subcommands return an i32 exit code and an [`AnyError`] error type.
trait SubcommandOutput {
fn output(self) -> Result<i32, AnyError>;
}
impl SubcommandOutput for Result<i32, AnyError> {
fn output(self) -> Result<i32, AnyError> {
self
}
}
impl SubcommandOutput for Result<(), AnyError> {
fn output(self) -> Result<i32, AnyError> {
self.map(|_| 0)
}
}
impl SubcommandOutput for Result<(), std::io::Error> {
fn output(self) -> Result<i32, AnyError> {
self.map(|_| 0).map_err(|e| e.into())
}
}
/// Ensure that the subcommand runs in a task, rather than being directly executed. Since some of these
/// futures are very large, this prevents the stack from getting blown out from passing them by value up
/// the callchain (especially in debug mode when Rust doesn't have a chance to elide copies!).
#[inline(always)]
fn spawn_subcommand<F: Future<Output = T> + 'static, T: SubcommandOutput>(
f: F,
) -> JoinHandle<Result<i32, AnyError>> {
// the boxed_local() is important in order to get windows to not blow the stack in debug
deno_core::unsync::spawn(
async move { f.map(|r| r.output()).await }.boxed_local(),
)
}
async fn run_subcommand(flags: Flags) -> Result<i32, AnyError> {
let handle = match flags.subcommand.clone() {
DenoSubcommand::Add(add_flags) => spawn_subcommand(async {
tools::registry::add(flags, add_flags).await
}),
DenoSubcommand::Bench(bench_flags) => spawn_subcommand(async {
if bench_flags.watch.is_some() {
tools::bench::run_benchmarks_with_watch(flags, bench_flags).await
} else {
tools::bench::run_benchmarks(flags, bench_flags).await
}
}),
DenoSubcommand::Bundle(bundle_flags) => spawn_subcommand(async {
tools::bundle::bundle(flags, bundle_flags).await
}),
DenoSubcommand::Doc(doc_flags) => {
spawn_subcommand(async { tools::doc::doc(flags, doc_flags).await })
}
DenoSubcommand::Eval(eval_flags) => spawn_subcommand(async {
tools::run::eval_command(flags, eval_flags).await
}),
DenoSubcommand::Cache(cache_flags) => spawn_subcommand(async move {
let factory = CliFactory::from_flags(flags)?;
let module_load_preparer = factory.module_load_preparer().await?;
let emitter = factory.emitter()?;
let graph_container = factory.graph_container();
module_load_preparer
.load_and_type_check_files(&cache_flags.files)
.await?;
emitter.cache_module_emits(&graph_container.graph())
}),
DenoSubcommand::Check(check_flags) => spawn_subcommand(async move {
let factory = CliFactory::from_flags(flags)?;
let module_load_preparer = factory.module_load_preparer().await?;
module_load_preparer
.load_and_type_check_files(&check_flags.files)
.await
}),
DenoSubcommand::Compile(compile_flags) => spawn_subcommand(async {
tools::compile::compile(flags, compile_flags).await
}),
DenoSubcommand::Coverage(coverage_flags) => spawn_subcommand(async {
tools::coverage::cover_files(flags, coverage_flags).await
}),
DenoSubcommand::Fmt(fmt_flags) => {
spawn_subcommand(
async move { tools::fmt::format(flags, fmt_flags).await },
)
}
DenoSubcommand::Init(init_flags) => {
spawn_subcommand(async {
// make compiler happy since init_project is sync
tokio::task::yield_now().await;
tools::init::init_project(init_flags)
})
}
DenoSubcommand::Info(info_flags) => {
spawn_subcommand(async { tools::info::info(flags, info_flags).await })
}
DenoSubcommand::Install(install_flags) => spawn_subcommand(async {
tools::installer::install_command(flags, install_flags).await
}),
DenoSubcommand::Jupyter(jupyter_flags) => spawn_subcommand(async {
tools::jupyter::kernel(flags, jupyter_flags).await
}),
DenoSubcommand::Uninstall(uninstall_flags) => spawn_subcommand(async {
tools::installer::uninstall(uninstall_flags)
}),
DenoSubcommand::Lsp => spawn_subcommand(async { lsp::start().await }),
DenoSubcommand::Lint(lint_flags) => spawn_subcommand(async {
if lint_flags.rules {
tools::lint::print_rules_list(
lint_flags.json,
lint_flags.maybe_rules_tags,
);
Ok(())
} else {
tools::lint::lint(flags, lint_flags).await
}
}),
DenoSubcommand::Repl(repl_flags) => {
spawn_subcommand(async move { tools::repl::run(flags, repl_flags).await })
}
DenoSubcommand::Run(run_flags) => spawn_subcommand(async move {
if run_flags.is_stdin() {
tools::run::run_from_stdin(flags).await
} else {
tools::run::run_script(WorkerExecutionMode::Run, flags, run_flags.watch).await
}
}),
DenoSubcommand::Serve(serve_flags) => spawn_subcommand(async move {
tools::run::run_script(WorkerExecutionMode::Serve, flags, serve_flags.watch).await
}),
DenoSubcommand::Task(task_flags) => spawn_subcommand(async {
tools::task::execute_script(flags, task_flags).await
}),
DenoSubcommand::Test(test_flags) => {
spawn_subcommand(async {
if let Some(ref coverage_dir) = test_flags.coverage_dir {
std::fs::create_dir_all(coverage_dir)
.with_context(|| format!("Failed creating: {coverage_dir}"))?;
// this is set in order to ensure spawned processes use the same
// coverage directory
env::set_var(
"DENO_UNSTABLE_COVERAGE_DIR",
PathBuf::from(coverage_dir).canonicalize()?,
);
}
if test_flags.watch.is_some() {
tools::test::run_tests_with_watch(flags, test_flags).await
} else {
tools::test::run_tests(flags, test_flags).await
}
})
}
DenoSubcommand::Completions(completions_flags) => {
spawn_subcommand(async move {
display::write_to_stdout_ignore_sigpipe(&completions_flags.buf)
})
}
DenoSubcommand::Types => spawn_subcommand(async move {
let types = tsc::get_types_declaration_file_text();
display::write_to_stdout_ignore_sigpipe(types.as_bytes())
}),
#[cfg(feature = "upgrade")]
DenoSubcommand::Upgrade(upgrade_flags) => spawn_subcommand(async {
tools::upgrade::upgrade(flags, upgrade_flags).await
}),
#[cfg(not(feature = "upgrade"))]
DenoSubcommand::Upgrade(_) => exit_with_message(
"This deno was built without the \"upgrade\" feature. Please upgrade using the installation method originally used to install Deno.",
1,
),
DenoSubcommand::Vendor(vendor_flags) => spawn_subcommand(async {
tools::vendor::vendor(flags, vendor_flags).await
}),
// TODO:
DenoSubcommand::Publish(publish_flags) => spawn_subcommand(async {
tools::registry::publish(flags, publish_flags).await
}),
};
handle.await?
}
fn setup_panic_hook() {
// This function does two things inside of the panic hook:
// - Tokio does not exit the process when a task panics, so we define a custom
// panic hook to implement this behaviour.
// - We print a message to stderr to indicate that this is a bug in Deno, and
// should be reported to us.
let orig_hook = std::panic::take_hook();
std::panic::set_hook(Box::new(move |panic_info| {
eprintln!("\n============================================================");
eprintln!("Deno has panicked. This is a bug in Deno. Please report this");
eprintln!("at https://github.com/denoland/deno/issues/new.");
eprintln!("If you can reliably reproduce this panic, include the");
eprintln!("reproduction steps and re-run with the RUST_BACKTRACE=1 env");
eprintln!("var set and include the backtrace in your report.");
eprintln!();
eprintln!("Platform: {} {}", env::consts::OS, env::consts::ARCH);
eprintln!("Version: {}", version::deno());
eprintln!("Args: {:?}", env::args().collect::<Vec<_>>());
eprintln!();
orig_hook(panic_info);
std::process::exit(1);
}));
}
fn exit_with_message(message: &str, code: i32) -> ! {
eprintln!(
"{}: {}",
colors::red_bold("error"),
message.trim_start_matches("error: ")
);
std::process::exit(code);
}
fn exit_for_error(error: AnyError) -> ! {
let mut error_string = format!("{error:?}");
let mut error_code = 1;
if let Some(e) = error.downcast_ref::<JsError>() {
error_string = format_js_error(e);
} else if let Some(args::LockfileError::IntegrityCheckFailed(e)) =
error.downcast_ref::<args::LockfileError>()
{
error_string = e.to_string();
error_code = 10;
} else if let Some(SnapshotFromLockfileError::IntegrityCheckFailed(e)) =
error.downcast_ref::<SnapshotFromLockfileError>()
{
error_string = e.to_string();
error_code = 10;
}
exit_with_message(&error_string, error_code);
}
pub(crate) fn unstable_exit_cb(feature: &str, api_name: &str) {
eprintln!(
"Unstable API '{api_name}'. The `--unstable-{}` flag must be provided.",
feature
);
std::process::exit(70);
}
// TODO(bartlomieju): remove when `--unstable` flag is removed.
pub(crate) fn unstable_warn_cb(feature: &str, api_name: &str) {
eprintln!(
"⚠️ {}",
colors::yellow(format!(
"The `{}` API was used with `--unstable` flag. The `--unstable` flag is deprecated and will be removed in Deno 2.0. Use granular `--unstable-{}` instead.\nLearn more at: https://docs.deno.com/runtime/manual/tools/unstable_flags",
api_name, feature
))
);
}
pub fn main() {
setup_panic_hook();
util::unix::raise_fd_limit();
util::windows::ensure_stdio_open();
#[cfg(windows)]
colors::enable_ansi(); // For Windows 10
deno_runtime::permissions::set_prompt_callbacks(
Box::new(util::draw_thread::DrawThread::hide),
Box::new(util::draw_thread::DrawThread::show),
);
let args: Vec<_> = env::args_os().collect();
let current_exe_path = current_exe().unwrap();
let maybe_standalone = match standalone::extract_standalone(
¤t_exe_path,
Cow::Borrowed(&args),
) {
Ok(standalone) => standalone,
Err(err) => exit_for_error(err),
};
let future = async move {
match maybe_standalone {
Some(future) => {
let (metadata, eszip) = future.await?;
standalone::run(eszip, metadata).await
}
None => {
// NOTE(lucacasonato): due to new PKU feature introduced in V8 11.6 we need to
// initialize the V8 platform on a parent thread of all threads that will spawn
// V8 isolates.
let flags = resolve_flags_and_init(args)?;
run_subcommand(flags).await
}
}
};
match create_and_run_current_thread_with_maybe_metrics(future) {
Ok(exit_code) => std::process::exit(exit_code),
Err(err) => exit_for_error(err),
}
}
fn resolve_flags_and_init(
args: Vec<std::ffi::OsString>,
) -> Result<Flags, AnyError> {
let flags = match flags_from_vec(args) {
Ok(flags) => flags,
Err(err @ clap::Error { .. })
if err.kind() == clap::error::ErrorKind::DisplayHelp
|| err.kind() == clap::error::ErrorKind::DisplayVersion =>
{
err.print().unwrap();
std::process::exit(0);
}
Err(err) => exit_for_error(AnyError::from(err)),
};
// TODO(bartlomieju): remove when `--unstable` flag is removed.
if flags.unstable_config.legacy_flag_enabled {
if matches!(flags.subcommand, DenoSubcommand::Check(_)) {
eprintln!(
"⚠️ {}",
colors::yellow(
"The `--unstable` flag is not needed for `deno check` anymore."
)
);
} else {
eprintln!(
"⚠️ {}",
colors::yellow(
"The `--unstable` flag is deprecated and will be removed in Deno 2.0. Use granular `--unstable-*` flags instead.\nLearn more at: https://docs.deno.com/runtime/manual/tools/unstable_flags"
)
);
}
}
let default_v8_flags = match flags.subcommand {
// Using same default as VSCode:
// https://github.com/microsoft/vscode/blob/48d4ba271686e8072fc6674137415bc80d936bc7/extensions/typescript-language-features/src/configuration/configuration.ts#L213-L214
DenoSubcommand::Lsp => vec!["--max-old-space-size=3072".to_string()],
_ => {
if *DENO_FUTURE {
// deno_ast removes TypeScript `assert` keywords, so this flag only affects JavaScript
// TODO(petamoriken): Need to check TypeScript `assert` keywords in deno_ast
vec!["--no-harmony-import-assertions".to_string()]
} else {
vec![]
}
}
};
init_v8_flags(&default_v8_flags, &flags.v8_flags, get_v8_flags_from_env());
deno_core::JsRuntime::init_platform(None);
util::logger::init(flags.log_level);
Ok(flags)
}