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Make the BUG_REPORT_URL configurable by tools
This greatly simplifies how hard it is to set a custom bug report url; previously tools had to copy the entire hook implementation. - Switch clippy to the new hook This also adds a `extra_info` callback so clippy can include its own version number, which differs from rustc's. - Call `install_ice_hook` in rustfmt
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@ -11,7 +11,6 @@
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// FIXME: switch to something more ergonomic here, once available.
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// (Currently there is no way to opt into sysroot crates without `extern crate`.)
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extern crate rustc_driver;
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extern crate rustc_errors;
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extern crate rustc_interface;
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extern crate rustc_session;
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extern crate rustc_span;
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@ -20,13 +19,10 @@ use rustc_interface::interface;
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use rustc_session::parse::ParseSess;
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use rustc_span::symbol::Symbol;
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use std::borrow::Cow;
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use std::env;
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use std::ops::Deref;
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use std::panic;
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use std::path::Path;
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use std::process::exit;
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use std::sync::LazyLock;
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/// If a command-line option matches `find_arg`, then apply the predicate `pred` on its value. If
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/// true, then return it. The parameter is assumed to be either `--arg=value` or `--arg value`.
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@ -198,66 +194,18 @@ You can use tool lints to allow or deny lints from your code, eg.:
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const BUG_REPORT_URL: &str = "https://github.com/rust-lang/rust-clippy/issues/new";
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type PanicCallback = dyn Fn(&panic::PanicInfo<'_>) + Sync + Send + 'static;
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static ICE_HOOK: LazyLock<Box<PanicCallback>> = LazyLock::new(|| {
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let hook = panic::take_hook();
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panic::set_hook(Box::new(|info| report_clippy_ice(info, BUG_REPORT_URL)));
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hook
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});
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fn report_clippy_ice(info: &panic::PanicInfo<'_>, bug_report_url: &str) {
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// Invoke our ICE handler, which prints the actual panic message and optionally a backtrace
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(*ICE_HOOK)(info);
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// Separate the output with an empty line
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eprintln!();
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let fallback_bundle = rustc_errors::fallback_fluent_bundle(rustc_driver::DEFAULT_LOCALE_RESOURCES.to_vec(), false);
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let emitter = Box::new(rustc_errors::emitter::EmitterWriter::stderr(
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rustc_errors::ColorConfig::Auto,
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None,
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None,
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fallback_bundle,
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false,
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false,
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None,
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false,
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false,
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rustc_errors::TerminalUrl::No,
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));
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let handler = rustc_errors::Handler::with_emitter(true, None, emitter);
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// a .span_bug or .bug call has already printed what
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// it wants to print.
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if !info.payload().is::<rustc_errors::ExplicitBug>() {
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let mut d = rustc_errors::Diagnostic::new(rustc_errors::Level::Bug, "unexpected panic");
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handler.emit_diagnostic(&mut d);
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}
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let version_info = rustc_tools_util::get_version_info!();
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let xs: Vec<Cow<'static, str>> = vec![
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"the compiler unexpectedly panicked. this is a bug.".into(),
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format!("we would appreciate a bug report: {bug_report_url}").into(),
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format!("Clippy version: {version_info}").into(),
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];
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for note in &xs {
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handler.note_without_error(note.as_ref());
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}
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// If backtraces are enabled, also print the query stack
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let backtrace = env::var_os("RUST_BACKTRACE").map_or(false, |x| &x != "0");
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let num_frames = if backtrace { None } else { Some(2) };
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interface::try_print_query_stack(&handler, num_frames);
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}
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#[allow(clippy::too_many_lines)]
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pub fn main() {
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rustc_driver::init_rustc_env_logger();
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LazyLock::force(&ICE_HOOK);
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rustc_driver::install_ice_hook(BUG_REPORT_URL, |handler| {
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// FIXME: this macro calls unwrap internally but is called in a panicking context! It's not
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// as simple as moving the call from the hook to main, because `install_ice_hook` doesn't
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// accept a generic closure.
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let version_info = rustc_tools_util::get_version_info!();
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handler.note_without_error(format!("Clippy version: {version_info}"));
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});
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exit(rustc_driver::catch_with_exit_code(move || {
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let mut orig_args: Vec<String> = env::args().collect();
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let has_sysroot_arg = arg_value(&orig_args, "--sysroot", |_| true).is_some();
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