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Make the BUG_REPORT_URL configurable by tools

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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
This commit is contained in:
jyn 2023-04-29 06:29:07 -05:00
parent 0339d4e982
commit a233bd5e66
1 changed files with 9 additions and 61 deletions
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70
src/driver.rs
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@ -11,7 +11,6 @@
// FIXME: switch to something more ergonomic here, once available.
// (Currently there is no way to opt into sysroot crates without `extern crate`.)
extern crate rustc_driver;
extern crate rustc_errors;
extern crate rustc_interface;
extern crate rustc_session;
extern crate rustc_span;
@ -20,13 +19,10 @@ use rustc_interface::interface;
use rustc_session::parse::ParseSess;
use rustc_span::symbol::Symbol;
use std::borrow::Cow;
use std::env;
use std::ops::Deref;
use std::panic;
use std::path::Path;
use std::process::exit;
use std::sync::LazyLock;
/// If a command-line option matches `find_arg`, then apply the predicate `pred` on its value. If
/// true, then return it. The parameter is assumed to be either `--arg=value` or `--arg value`.
@ -198,66 +194,18 @@ You can use tool lints to allow or deny lints from your code, eg.:
const BUG_REPORT_URL: &str = "https://github.com/rust-lang/rust-clippy/issues/new";
type PanicCallback = dyn Fn(&panic::PanicInfo<'_>) + Sync + Send + 'static;
static ICE_HOOK: LazyLock<Box<PanicCallback>> = LazyLock::new(|| {
let hook = panic::take_hook();
panic::set_hook(Box::new(|info| report_clippy_ice(info, BUG_REPORT_URL)));
hook
});
fn report_clippy_ice(info: &panic::PanicInfo<'_>, bug_report_url: &str) {
// Invoke our ICE handler, which prints the actual panic message and optionally a backtrace
(*ICE_HOOK)(info);
// Separate the output with an empty line
eprintln!();
let fallback_bundle = rustc_errors::fallback_fluent_bundle(rustc_driver::DEFAULT_LOCALE_RESOURCES.to_vec(), false);
let emitter = Box::new(rustc_errors::emitter::EmitterWriter::stderr(
rustc_errors::ColorConfig::Auto,
None,
None,
fallback_bundle,
false,
false,
None,
false,
false,
rustc_errors::TerminalUrl::No,
));
let handler = rustc_errors::Handler::with_emitter(true, None, emitter);
// a .span_bug or .bug call has already printed what
// it wants to print.
if !info.payload().is::<rustc_errors::ExplicitBug>() {
let mut d = rustc_errors::Diagnostic::new(rustc_errors::Level::Bug, "unexpected panic");
handler.emit_diagnostic(&mut d);
}
let version_info = rustc_tools_util::get_version_info!();
let xs: Vec<Cow<'static, str>> = vec![
"the compiler unexpectedly panicked. this is a bug.".into(),
format!("we would appreciate a bug report: {bug_report_url}").into(),
format!("Clippy version: {version_info}").into(),
];
for note in &xs {
handler.note_without_error(note.as_ref());
}
// If backtraces are enabled, also print the query stack
let backtrace = env::var_os("RUST_BACKTRACE").map_or(false, |x| &x != "0");
let num_frames = if backtrace { None } else { Some(2) };
interface::try_print_query_stack(&handler, num_frames);
}
#[allow(clippy::too_many_lines)]
pub fn main() {
rustc_driver::init_rustc_env_logger();
LazyLock::force(&ICE_HOOK);
rustc_driver::install_ice_hook(BUG_REPORT_URL, |handler| {
// FIXME: this macro calls unwrap internally but is called in a panicking context! It's not
// as simple as moving the call from the hook to main, because `install_ice_hook` doesn't
// accept a generic closure.
let version_info = rustc_tools_util::get_version_info!();
handler.note_without_error(format!("Clippy version: {version_info}"));
});
exit(rustc_driver::catch_with_exit_code(move || {
let mut orig_args: Vec<String> = env::args().collect();
let has_sysroot_arg = arg_value(&orig_args, "--sysroot", |_| true).is_some();