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Better exe probing

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This commit is contained in:
Aleksey Kladov 2020-06-27 02:00:08 +02:00
parent b1a4e810a4
commit f89722f357
1 changed files with 11 additions and 10 deletions
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21
crates/ra_toolchain/src/lib.rs
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@ -46,22 +46,23 @@ fn get_path_for_executable(executable_name: &'static str) -> PathBuf {
path.push(".cargo");
path.push("bin");
path.push(executable_name);
if path.is_file() {
if let Some(path) = probe(path) {
return path;
}
}
executable_name.into()
}
fn lookup_in_path(exec: &str) -> bool {
let paths = env::var_os("PATH").unwrap_or_default();
let mut candidates = env::split_paths(&paths).flat_map(|path| {
let candidate = path.join(&exec);
let with_exe = match env::consts::EXE_EXTENSION {
"" => None,
it => Some(candidate.with_extension(it)),
};
iter::once(candidate).chain(with_exe)
});
candidates.any(|it| it.is_file())
env::split_paths(&paths).map(|path| path.join(exec)).find_map(probe).is_some()
}
fn probe(path: PathBuf) -> Option<PathBuf> {
let with_extension = match env::consts::EXE_EXTENSION {
"" => None,
it => Some(path.with_extension(it)),
};
iter::once(path).chain(with_extension).find(|it| it.is_file())
}