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prioritise rustup sysroots over system ones

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`get_path_for_executable` will now first check `$CARGO_HOME` before falling back to searching `$PATH`.

rustup is the recommended way to manage rust toolchains, therefore should be picked before the
system toolchain.
This commit is contained in:
Scott Mabin 2024-02-24 21:19:10 +00:00
parent 4a8d0f7f56
commit 9f1d4aa4b9
1 changed files with 7 additions and 7 deletions
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14
crates/toolchain/src/lib.rs
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@ -63,21 +63,17 @@ fn get_path_for_executable(executable_name: &'static str) -> PathBuf {
// The current implementation checks three places for an executable to use:
// 1) Appropriate environment variable (erroring if this is set but not a usable executable)
// example: for cargo, this checks $CARGO environment variable; for rustc, $RUSTC; etc
// 2) `<executable_name>`
// example: for cargo, this tries just `cargo`, which will succeed if `cargo` is on the $PATH
// 3) `$CARGO_HOME/bin/<executable_name>`
// 2) `$CARGO_HOME/bin/<executable_name>`
// where $CARGO_HOME defaults to ~/.cargo (see https://doc.rust-lang.org/cargo/guide/cargo-home.html)
// example: for cargo, this tries $CARGO_HOME/bin/cargo, or ~/.cargo/bin/cargo if $CARGO_HOME is unset.
// It seems that this is a reasonable place to try for cargo, rustc, and rustup
// 3) `<executable_name>`
// example: for cargo, this tries just `cargo`, which will succeed if `cargo` is on the $PATH
let env_var = executable_name.to_ascii_uppercase();
if let Some(path) = env::var_os(env_var) {
return path.into();
}
if lookup_in_path(executable_name) {
return executable_name.into();
}
if let Some(mut path) = get_cargo_home() {
path.push("bin");
path.push(executable_name);
@ -86,6 +82,10 @@ fn get_path_for_executable(executable_name: &'static str) -> PathBuf {
}
}
if lookup_in_path(executable_name) {
return executable_name.into();
}
executable_name.into()
}