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(path: &str) {
  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                 .status(),
  34         );
  35     } else {
  36         exit_if_err(Command::new("cargo").arg("build").status());
  37
  38         // Run in a tempdir as changes to clippy do not retrigger linting
  39         let target = tempfile::Builder::new()
  40             .prefix("clippy")
  41             .tempdir()
  42             .expect("failed to create tempdir");
  43
  44         let status = Command::new(cargo_clippy_path())
  45             .current_dir(path)
  46             .env("CARGO_TARGET_DIR", target.as_ref())
  47             .status();
  48
  49         target.close().expect("failed to remove tempdir");
  50         exit_if_err(status);
  51     }
  52 }