diff options
Diffstat (limited to 'crates/ra_toolchain/src/lib.rs')
-rw-r--r-- | crates/ra_toolchain/src/lib.rs | 68 |
1 files changed, 0 insertions, 68 deletions
diff --git a/crates/ra_toolchain/src/lib.rs b/crates/ra_toolchain/src/lib.rs deleted file mode 100644 index 9916e52c4..000000000 --- a/crates/ra_toolchain/src/lib.rs +++ /dev/null | |||
@@ -1,68 +0,0 @@ | |||
1 | //! This crate contains a single public function | ||
2 | //! [`get_path_for_executable`](fn.get_path_for_executable.html). | ||
3 | //! See docs there for more information. | ||
4 | use std::{env, iter, path::PathBuf}; | ||
5 | |||
6 | pub fn cargo() -> PathBuf { | ||
7 | get_path_for_executable("cargo") | ||
8 | } | ||
9 | |||
10 | pub fn rustc() -> PathBuf { | ||
11 | get_path_for_executable("rustc") | ||
12 | } | ||
13 | |||
14 | pub fn rustup() -> PathBuf { | ||
15 | get_path_for_executable("rustup") | ||
16 | } | ||
17 | |||
18 | pub fn rustfmt() -> PathBuf { | ||
19 | get_path_for_executable("rustfmt") | ||
20 | } | ||
21 | |||
22 | /// Return a `PathBuf` to use for the given executable. | ||
23 | /// | ||
24 | /// E.g., `get_path_for_executable("cargo")` may return just `cargo` if that | ||
25 | /// gives a valid Cargo executable; or it may return a full path to a valid | ||
26 | /// Cargo. | ||
27 | fn get_path_for_executable(executable_name: &'static str) -> PathBuf { | ||
28 | // The current implementation checks three places for an executable to use: | ||
29 | // 1) Appropriate environment variable (erroring if this is set but not a usable executable) | ||
30 | // example: for cargo, this checks $CARGO environment variable; for rustc, $RUSTC; etc | ||
31 | // 2) `<executable_name>` | ||
32 | // example: for cargo, this tries just `cargo`, which will succeed if `cargo` is on the $PATH | ||
33 | // 3) `~/.cargo/bin/<executable_name>` | ||
34 | // example: for cargo, this tries ~/.cargo/bin/cargo | ||
35 | // It seems that this is a reasonable place to try for cargo, rustc, and rustup | ||
36 | let env_var = executable_name.to_ascii_uppercase(); | ||
37 | if let Some(path) = env::var_os(&env_var) { | ||
38 | return path.into(); | ||
39 | } | ||
40 | |||
41 | if lookup_in_path(executable_name) { | ||
42 | return executable_name.into(); | ||
43 | } | ||
44 | |||
45 | if let Some(mut path) = home::home_dir() { | ||
46 | path.push(".cargo"); | ||
47 | path.push("bin"); | ||
48 | path.push(executable_name); | ||
49 | if let Some(path) = probe(path) { | ||
50 | return path; | ||
51 | } | ||
52 | } | ||
53 | |||
54 | executable_name.into() | ||
55 | } | ||
56 | |||
57 | fn lookup_in_path(exec: &str) -> bool { | ||
58 | let paths = env::var_os("PATH").unwrap_or_default(); | ||
59 | env::split_paths(&paths).map(|path| path.join(exec)).find_map(probe).is_some() | ||
60 | } | ||
61 | |||
62 | fn probe(path: PathBuf) -> Option<PathBuf> { | ||
63 | let with_extension = match env::consts::EXE_EXTENSION { | ||
64 | "" => None, | ||
65 | it => Some(path.with_extension(it)), | ||
66 | }; | ||
67 | iter::once(path).chain(with_extension).find(|it| it.is_file()) | ||
68 | } | ||