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Respect RUSTC environment variable if present

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David Tolnay 2023-12-26 10:13:31 -08:00
parent 1d4e1fbf88
commit fe8bd08477
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1 changed files with 18 additions and 14 deletions
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32
src/main.rs
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@ -410,22 +410,26 @@ fn apply_args(cmd: &mut Command, args: &Expand, color: &Coloring, outfile: &Path
}
fn needs_rustc_bootstrap() -> bool {
let mut cmd = Command::new(cargo_binary());
cmd.arg("rustc");
cmd.arg("-Zunstable-options");
cmd.arg("--print=sysroot");
cmd.env("RUSTC_BOOTSTRAP", "1");
cmd.stdin(Stdio::null());
cmd.stderr(Stdio::null());
let Ok(output) = cmd.output() else {
return true;
};
let Ok(stdout) = str::from_utf8(&output.stdout) else {
return true;
let rustc = if let Some(rustc) = env::var_os("RUSTC") {
PathBuf::from(rustc)
} else {
let mut cmd = Command::new(cargo_binary());
cmd.arg("rustc");
cmd.arg("-Zunstable-options");
cmd.arg("--print=sysroot");
cmd.env("RUSTC_BOOTSTRAP", "1");
cmd.stdin(Stdio::null());
cmd.stderr(Stdio::null());
let Ok(output) = cmd.output() else {
return true;
};
let Ok(stdout) = str::from_utf8(&output.stdout) else {
return true;
};
let sysroot = Path::new(stdout.trim_end());
sysroot.join("bin").join("rustc")
};
let sysroot = Path::new(stdout.trim_end());
let rustc = sysroot.join("bin").join("rustc");
let mut cmd = Command::new(rustc);
cmd.arg("-Zunpretty=expanded");
cmd.arg("-");