clippy_dev/src/lint.rs

   1 use crate::cargo_clippy_path;
   2 use std::process::{self, Command, ExitStatus};
   3 use std::{fs, io};
   4
   5 fn exit_if_err(status: io::Result<ExitStatus>) {
   6     match status.expect("failed to run command").code() {
   7         Some(0) => {},
   8         Some(n) => process::exit(n),
   9         None => {
  10             eprintln!("Killed by signal");
  11             process::exit(1);
  12         },
  13     }
  14 }
  15
  16 pub fn run<'a>(path: &str, args: impl Iterator<Item = &'a String>) {
  17     let is_file = match fs::metadata(path) {
  18         Ok(metadata) => metadata.is_file(),
  19         Err(e) => {
  20             eprintln!("Failed to read {path}: {e:?}");
  21             process::exit(1);
  22         },
  23     };
  24
  25     if is_file {
  26         exit_if_err(
  27             Command::new("cargo")
  28                 .args(["run", "--bin", "clippy-driver", "--"])
  29                 .args(["-L", "./target/debug"])
  30                 .args(["-Z", "no-codegen"])
  31                 .args(["--edition", "2021"])
  32                 .arg(path)
  33                 .args(args)
  34                 .status(),
  35         );
  36     } else {
  37         exit_if_err(Command::new("cargo").arg("build").status());
  38
  39         // Run in a tempdir as changes to clippy do not retrigger linting
  40         let target = tempfile::Builder::new()
  41             .prefix("clippy")
  42             .tempdir()
  43             .expect("failed to create tempdir");
  44
  45         let status = Command::new(cargo_clippy_path())
  46             .arg("clippy")
  47             .args(args)
  48             .current_dir(path)
  49             .env("CARGO_TARGET_DIR", target.as_ref())
  50             .status();
  51
  52         target.close().expect("failed to remove tempdir");
  53         exit_if_err(status);
  54     }
  55 }