#![cfg_attr(feature = "deny-warnings", deny(warnings))]
#![feature(rustc_private)]
+#![feature(str_strip)]
// FIXME: switch to something more ergonomic here, once available.
// (Currently there is no way to opt into sysroot crates without `extern crate`.)
#[allow(unused_extern_crates)]
+extern crate rustc;
+#[allow(unused_extern_crates)]
extern crate rustc_driver;
#[allow(unused_extern_crates)]
-extern crate rustc_interface;
+extern crate rustc_errors;
#[allow(unused_extern_crates)]
-extern crate rustc_plugin;
+extern crate rustc_interface;
+use rustc::ty::TyCtxt;
use rustc_interface::interface;
-use rustc_tools_util::*;
+use rustc_tools_util::VersionInfo;
+use lazy_static::lazy_static;
+use std::borrow::Cow;
+use std::env;
+use std::ops::Deref;
+use std::panic;
use std::path::{Path, PathBuf};
use std::process::{exit, Command};
/// 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`.
-fn arg_value<'a>(
- args: impl IntoIterator<Item = &'a String>,
+fn arg_value<'a, T: Deref<Target = str>>(
+ args: &'a [T],
find_arg: &str,
pred: impl Fn(&str) -> bool,
) -> Option<&'a str> {
- let mut args = args.into_iter().map(String::as_str);
-
+ let mut args = args.iter().map(Deref::deref);
while let Some(arg) = args.next() {
- let arg: Vec<_> = arg.splitn(2, '=').collect();
- if arg.get(0) != Some(&find_arg) {
+ let mut arg = arg.splitn(2, '=');
+ if arg.next() != Some(find_arg) {
continue;
}
- let value = arg.get(1).cloned().or_else(|| args.next());
- if value.as_ref().map_or(false, |p| pred(p)) {
- return value;
+ match arg.next().or_else(|| args.next()) {
+ Some(v) if pred(v) => return Some(v),
+ _ => {},
}
}
None
#[test]
fn test_arg_value() {
- let args: Vec<_> = ["--bar=bar", "--foobar", "123", "--foo"]
- .iter()
- .map(std::string::ToString::to_string)
- .collect();
-
- assert_eq!(arg_value(None, "--foobar", |_| true), None);
- assert_eq!(arg_value(&args, "--bar", |_| false), None);
- assert_eq!(arg_value(&args, "--bar", |_| true), Some("bar"));
- assert_eq!(arg_value(&args, "--bar", |p| p == "bar"), Some("bar"));
- assert_eq!(arg_value(&args, "--bar", |p| p == "foo"), None);
- assert_eq!(arg_value(&args, "--foobar", |p| p == "foo"), None);
- assert_eq!(arg_value(&args, "--foobar", |p| p == "123"), Some("123"));
- assert_eq!(arg_value(&args, "--foo", |_| true), None);
+ let args = &["--bar=bar", "--foobar", "123", "--foo"];
+
+ assert_eq!(arg_value(&[] as &[&str], "--foobar", |_| true), None);
+ assert_eq!(arg_value(args, "--bar", |_| false), None);
+ assert_eq!(arg_value(args, "--bar", |_| true), Some("bar"));
+ assert_eq!(arg_value(args, "--bar", |p| p == "bar"), Some("bar"));
+ assert_eq!(arg_value(args, "--bar", |p| p == "foo"), None);
+ assert_eq!(arg_value(args, "--foobar", |p| p == "foo"), None);
+ assert_eq!(arg_value(args, "--foobar", |p| p == "123"), Some("123"));
+ assert_eq!(arg_value(args, "--foo", |_| true), None);
}
-#[allow(clippy::too_many_lines)]
+struct DefaultCallbacks;
+impl rustc_driver::Callbacks for DefaultCallbacks {}
struct ClippyCallbacks;
-
impl rustc_driver::Callbacks for ClippyCallbacks {
- fn after_parsing(&mut self, compiler: &interface::Compiler) -> bool {
- let sess = compiler.session();
- let mut registry = rustc_plugin::registry::Registry::new(
- sess,
- compiler
- .parse()
- .expect(
- "at this compilation stage \
- the crate must be parsed",
- )
- .peek()
- .span,
- );
- registry.args_hidden = Some(Vec::new());
-
- let conf = clippy_lints::read_conf(®istry);
- clippy_lints::register_plugins(&mut registry, &conf);
-
- let rustc_plugin::registry::Registry {
- early_lint_passes,
- late_lint_passes,
- lint_groups,
- llvm_passes,
- attributes,
- ..
- } = registry;
- let mut ls = sess.lint_store.borrow_mut();
- for pass in early_lint_passes {
- ls.register_early_pass(Some(sess), true, false, pass);
- }
- for pass in late_lint_passes {
- ls.register_late_pass(Some(sess), true, false, false, pass);
- }
-
- for (name, (to, deprecated_name)) in lint_groups {
- ls.register_group(Some(sess), true, name, deprecated_name, to);
- }
- clippy_lints::register_pre_expansion_lints(sess, &mut ls, &conf);
- clippy_lints::register_renamed(&mut ls);
-
- sess.plugin_llvm_passes.borrow_mut().extend(llvm_passes);
- sess.plugin_attributes.borrow_mut().extend(attributes);
+ fn config(&mut self, config: &mut interface::Config) {
+ let previous = config.register_lints.take();
+ config.register_lints = Some(Box::new(move |sess, mut lint_store| {
+ // technically we're ~guaranteed that this is none but might as well call anything that
+ // is there already. Certainly it can't hurt.
+ if let Some(previous) = &previous {
+ (previous)(sess, lint_store);
+ }
- // Continue execution
- true
+ let conf = clippy_lints::read_conf(&[], &sess);
+ clippy_lints::register_plugins(&mut lint_store, &sess, &conf);
+ clippy_lints::register_pre_expansion_lints(&mut lint_store, &conf);
+ clippy_lints::register_renamed(&mut lint_store);
+ }));
+
+ // FIXME: #4825; This is required, because Clippy lints that are based on MIR have to be
+ // run on the unoptimized MIR. On the other hand this results in some false negatives. If
+ // MIR passes can be enabled / disabled separately, we should figure out, what passes to
+ // use for Clippy.
+ config.opts.debugging_opts.mir_opt_level = 0;
}
}
#[allow(clippy::find_map, clippy::filter_map)]
fn describe_lints() {
- use lintlist::*;
+ use lintlist::{Level, Lint, ALL_LINTS, LINT_LEVELS};
use std::collections::HashSet;
println!(
);
}
+const BUG_REPORT_URL: &str = "https://github.com/rust-lang/rust-clippy/issues/new";
+
+lazy_static! {
+ static ref ICE_HOOK: Box<dyn Fn(&panic::PanicInfo<'_>) + Sync + Send + 'static> = {
+ 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 emitter = Box::new(rustc_errors::emitter::EmitterWriter::stderr(
+ rustc_errors::ColorConfig::Auto,
+ None,
+ false,
+ false,
+ None,
+ false,
+ ));
+ 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 d = rustc_errors::Diagnostic::new(rustc_errors::Level::Bug, "unexpected panic");
+ handler.emit_diagnostic(&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(¬e);
+ }
+
+ // If backtraces are enabled, also print the query stack
+ let backtrace = env::var_os("RUST_BACKTRACE").map_or(false, |x| &x != "0");
+
+ if backtrace {
+ TyCtxt::try_print_query_stack(&handler);
+ }
+}
+
+fn toolchain_path(home: Option<String>, toolchain: Option<String>) -> Option<PathBuf> {
+ home.and_then(|home| {
+ toolchain.map(|toolchain| {
+ let mut path = PathBuf::from(home);
+ path.push("toolchains");
+ path.push(toolchain);
+ path
+ })
+ })
+}
+
pub fn main() {
rustc_driver::init_rustc_env_logger();
+ lazy_static::initialize(&ICE_HOOK);
exit(
- rustc_driver::report_ices_to_stderr_if_any(move || {
- use std::env;
+ rustc_driver::catch_fatal_errors(move || {
+ let mut orig_args: Vec<String> = env::args().collect();
- if std::env::args().any(|a| a == "--version" || a == "-V") {
+ if orig_args.iter().any(|a| a == "--version" || a == "-V") {
let version_info = rustc_tools_util::get_version_info!();
println!("{}", version_info);
exit(0);
}
- let mut orig_args: Vec<String> = env::args().collect();
-
// Get the sysroot, looking from most specific to this invocation to the least:
// - command line
// - runtime environment
// - RUSTUP_HOME, MULTIRUST_HOME, RUSTUP_TOOLCHAIN, MULTIRUST_TOOLCHAIN
// - sysroot from rustc in the path
// - compile-time environment
+ // - SYSROOT
+ // - RUSTUP_HOME, MULTIRUST_HOME, RUSTUP_TOOLCHAIN, MULTIRUST_TOOLCHAIN
let sys_root_arg = arg_value(&orig_args, "--sysroot", |_| true);
let have_sys_root_arg = sys_root_arg.is_some();
let sys_root = sys_root_arg
.map(PathBuf::from)
.or_else(|| std::env::var("SYSROOT").ok().map(PathBuf::from))
.or_else(|| {
- let home = option_env!("RUSTUP_HOME").or(option_env!("MULTIRUST_HOME"));
- let toolchain = option_env!("RUSTUP_TOOLCHAIN").or(option_env!("MULTIRUST_TOOLCHAIN"));
- home.and_then(|home| {
- toolchain.map(|toolchain| {
- let mut path = PathBuf::from(home);
- path.push("toolchains");
- path.push(toolchain);
- path
- })
- })
+ let home = std::env::var("RUSTUP_HOME")
+ .or_else(|_| std::env::var("MULTIRUST_HOME"))
+ .ok();
+ let toolchain = std::env::var("RUSTUP_TOOLCHAIN")
+ .or_else(|_| std::env::var("MULTIRUST_TOOLCHAIN"))
+ .ok();
+ toolchain_path(home, toolchain)
})
.or_else(|| {
Command::new("rustc")
.map(|s| PathBuf::from(s.trim()))
})
.or_else(|| option_env!("SYSROOT").map(PathBuf::from))
+ .or_else(|| {
+ let home = option_env!("RUSTUP_HOME")
+ .or(option_env!("MULTIRUST_HOME"))
+ .map(ToString::to_string);
+ let toolchain = option_env!("RUSTUP_TOOLCHAIN")
+ .or(option_env!("MULTIRUST_TOOLCHAIN"))
+ .map(ToString::to_string);
+ toolchain_path(home, toolchain)
+ })
.map(|pb| pb.to_string_lossy().to_string())
.expect("need to specify SYSROOT env var during clippy compilation, or use rustup or multirust");
// Setting RUSTC_WRAPPER causes Cargo to pass 'rustc' as the first argument.
// We're invoking the compiler programmatically, so we ignore this/
- let wrapper_mode = Path::new(&orig_args[1]).file_stem() == Some("rustc".as_ref());
+ let wrapper_mode = orig_args.get(1).map(Path::new).and_then(Path::file_stem) == Some("rustc".as_ref());
if wrapper_mode {
// we still want to be able to invoke it normally though
orig_args.remove(1);
}
- if !wrapper_mode && std::env::args().any(|a| a == "--help" || a == "-h") {
+ if !wrapper_mode && (orig_args.iter().any(|a| a == "--help" || a == "-h") || orig_args.len() == 1) {
display_help();
exit(0);
}
let should_describe_lints = || {
- let args: Vec<_> = std::env::args().collect();
+ let args: Vec<_> = env::args().collect();
args.windows(2).any(|args| {
args[1] == "help"
&& match args[0].as_str() {
// this conditional check for the --sysroot flag is there so users can call
// `clippy_driver` directly
// without having to pass --sysroot or anything
- let mut args: Vec<String> = if have_sys_root_arg {
- orig_args.clone()
- } else {
- orig_args
- .clone()
- .into_iter()
- .chain(Some("--sysroot".to_owned()))
- .chain(Some(sys_root))
- .collect()
+ let mut args: Vec<String> = orig_args.clone();
+ if !have_sys_root_arg {
+ args.extend(vec!["--sysroot".into(), sys_root]);
};
// this check ensures that dependencies are built but not linted and the final
- // crate is
- // linted but not built
- let clippy_enabled = env::var("CLIPPY_TESTS").ok().map_or(false, |val| val == "true")
- || arg_value(&orig_args, "--emit", |val| val.split(',').any(|e| e == "metadata")).is_some();
+ // crate is linted but not built
+ let clippy_enabled = env::var("CLIPPY_TESTS").map_or(false, |val| val == "true")
+ || arg_value(&orig_args, "--cap-lints", |val| val == "allow").is_none();
if clippy_enabled {
- args.extend_from_slice(&["--cfg".to_owned(), r#"feature="cargo-clippy""#.to_owned()]);
+ args.extend(vec!["--cfg".into(), r#"feature="cargo-clippy""#.into()]);
if let Ok(extra_args) = env::var("CLIPPY_ARGS") {
args.extend(extra_args.split("__CLIPPY_HACKERY__").filter_map(|s| {
if s.is_empty() {
}));
}
}
-
let mut clippy = ClippyCallbacks;
- let mut default = rustc_driver::DefaultCallbacks;
+ let mut default = DefaultCallbacks;
let callbacks: &mut (dyn rustc_driver::Callbacks + Send) =
if clippy_enabled { &mut clippy } else { &mut default };
- let args = args;
rustc_driver::run_compiler(&args, callbacks, None, None)
})
.and_then(|result| result)
projects / rust.git / blobdiff