2 #![feature(box_syntax)]
3 #![feature(rustc_private)]
5 #![allow(unknown_lints, missing_docs_in_private_items)]
7 extern crate clippy_lints;
10 extern crate rustc_driver;
11 extern crate rustc_errors;
12 extern crate rustc_plugin;
15 use rustc_driver::{driver, CompilerCalls, RustcDefaultCalls, Compilation};
16 use rustc::session::{config, Session};
17 use rustc::session::config::{Input, ErrorOutputType};
18 use std::path::PathBuf;
19 use std::process::Command;
22 use clippy_lints::utils::cargo;
24 struct ClippyCompilerCalls {
25 default: RustcDefaultCalls,
29 impl ClippyCompilerCalls {
30 fn new(run_lints: bool) -> Self {
32 default: RustcDefaultCalls,
38 impl<'a> CompilerCalls<'a> for ClippyCompilerCalls {
39 fn early_callback(&mut self,
40 matches: &getopts::Matches,
41 sopts: &config::Options,
42 cfg: &ast::CrateConfig,
43 descriptions: &rustc_errors::registry::Registry,
44 output: ErrorOutputType)
46 self.default.early_callback(matches, sopts, cfg, descriptions, output)
48 fn no_input(&mut self,
49 matches: &getopts::Matches,
50 sopts: &config::Options,
51 cfg: &ast::CrateConfig,
52 odir: &Option<PathBuf>,
53 ofile: &Option<PathBuf>,
54 descriptions: &rustc_errors::registry::Registry)
55 -> Option<(Input, Option<PathBuf>)> {
56 self.default.no_input(matches, sopts, cfg, odir, ofile, descriptions)
58 fn late_callback(&mut self,
59 matches: &getopts::Matches,
61 cfg: &ast::CrateConfig,
63 odir: &Option<PathBuf>,
64 ofile: &Option<PathBuf>)
66 self.default.late_callback(matches, sess, cfg, input, odir, ofile)
68 fn build_controller(&mut self, sess: &Session, matches: &getopts::Matches) -> driver::CompileController<'a> {
69 let mut control = self.default.build_controller(sess, matches);
72 let old = std::mem::replace(&mut control.after_parse.callback, box |_| {});
73 control.after_parse.callback = Box::new(move |state| {
75 let mut registry = rustc_plugin::registry::Registry::new(state.session, state.krate.as_ref().expect("at this compilation stage the krate must be parsed").span);
76 registry.args_hidden = Some(Vec::new());
77 clippy_lints::register_plugins(&mut registry);
79 let rustc_plugin::registry::Registry { early_lint_passes,
86 let sess = &state.session;
87 let mut ls = sess.lint_store.borrow_mut();
88 for pass in early_lint_passes {
89 ls.register_early_pass(Some(sess), true, pass);
91 for pass in late_lint_passes {
92 ls.register_late_pass(Some(sess), true, pass);
95 for (name, to) in lint_groups {
96 ls.register_group(Some(sess), true, name, to);
99 sess.plugin_llvm_passes.borrow_mut().extend(llvm_passes);
100 sess.mir_passes.borrow_mut().extend(mir_passes);
101 sess.plugin_attributes.borrow_mut().extend(attributes);
116 if env::var("CLIPPY_DOGFOOD").map(|_| true).unwrap_or(false) {
120 let dep_path = env::current_dir().expect("current dir is not readable").join("target").join("debug").join("deps");
122 let home = option_env!("RUSTUP_HOME").or(option_env!("MULTIRUST_HOME"));
123 let toolchain = option_env!("RUSTUP_TOOLCHAIN").or(option_env!("MULTIRUST_TOOLCHAIN"));
124 let sys_root = if let (Some(home), Some(toolchain)) = (home, toolchain) {
125 format!("{}/toolchains/{}", home, toolchain)
127 option_env!("SYSROOT")
128 .map(|s| s.to_owned())
129 .or(Command::new("rustc")
134 .and_then(|out| String::from_utf8(out.stdout).ok())
135 .map(|s| s.trim().to_owned()))
136 .expect("need to specify SYSROOT env var during clippy compilation, or use rustup or multirust")
139 if let Some("clippy") = std::env::args().nth(1).as_ref().map(AsRef::as_ref) {
140 // this arm is executed on the initial call to `cargo clippy`
141 let manifest_path = std::env::args().skip(2).find(|val| val.starts_with("--manifest-path="));
142 let mut metadata = cargo::metadata(manifest_path).expect("could not obtain cargo metadata");
143 assert_eq!(metadata.version, 1);
144 for target in metadata.packages.remove(0).targets {
145 let args = std::env::args().skip(2);
146 if let Some(first) = target.kind.get(0) {
147 if target.kind.len() > 1 || first.ends_with("lib") {
148 if let Err(code) = process(std::iter::once("--lib".to_owned()).chain(args), &dep_path, &sys_root) {
149 std::process::exit(code);
151 } else if ["bin", "example", "test", "bench"].contains(&&**first) {
152 if let Err(code) = process(vec![format!("--{}", first), target.name].into_iter().chain(args), &dep_path, &sys_root) {
153 std::process::exit(code);
157 panic!("badly formatted cargo metadata: target::kind is an empty array");
161 // this arm is executed when cargo-clippy runs `cargo rustc` with the `RUSTC` env var set to itself
163 // this conditional check for the --sysroot flag is there so users can call `cargo-clippy` directly
164 // without having to pass --sysroot or anything
165 let args: Vec<String> = if env::args().any(|s| s == "--sysroot") {
166 env::args().collect()
168 env::args().chain(Some("--sysroot".to_owned())).chain(Some(sys_root)).collect()
170 // this check ensures that dependencies are built but not linted and the final crate is
171 // linted but not built
172 let mut ccc = ClippyCompilerCalls::new(env::args().any(|s| s == "-Zno-trans"));
173 let (result, _) = rustc_driver::run_compiler(&args, &mut ccc, None, None);
175 if let Err(err_count) = result {
177 std::process::exit(1);
183 fn process<P, I>(old_args: I, dep_path: P, sysroot: &str) -> Result<(), i32>
184 where P: AsRef<Path>,
185 I: Iterator<Item = String>
188 let mut args = vec!["rustc".to_owned()];
190 let mut found_dashes = false;
191 for arg in old_args {
192 found_dashes |= arg == "--";
196 args.push("--".to_owned());
198 args.push("-L".to_owned());
199 args.push(dep_path.as_ref().to_string_lossy().into_owned());
200 args.push(String::from("--sysroot"));
201 args.push(sysroot.to_owned());
202 args.push("-Zno-trans".to_owned());
204 let path = std::env::current_exe().expect("current executable path invalid");
205 let exit_status = std::process::Command::new("cargo")
208 .spawn().expect("could not run cargo")
209 .wait().expect("failed to wait for cargo?");
211 if exit_status.success() {
214 Err(exit_status.code().unwrap_or(-1))