Merging upstream version 1.70.0+dfsg1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 17 insertions, 4 deletions

diff --git a/src/tools/rust-analyzer/crates/toolchain/src/lib.rs b/src/tools/rust-analyzer/crates/toolchain/src/lib.rs
index 67bdad2aa..729f84a81 100644
--- a/src/tools/rust-analyzer/crates/toolchain/src/lib.rs
+++ b/src/tools/rust-analyzer/crates/toolchain/src/lib.rs
@@ -31,8 +31,9 @@ fn get_path_for_executable(executable_name: &'static str) -> PathBuf {
     //      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 $PATH
-    // 3) `~/.cargo/bin/<executable_name>`
-    //      example: for cargo, this tries ~/.cargo/bin/cargo
+    // 3) `$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
     let env_var = executable_name.to_ascii_uppercase();
     if let Some(path) = env::var_os(env_var) {
@@ -43,8 +44,7 @@ fn get_path_for_executable(executable_name: &'static str) -> PathBuf {
         return executable_name.into();
     }
 
-    if let Some(mut path) = home::home_dir() {
-        path.push(".cargo");
+    if let Some(mut path) = get_cargo_home() {
         path.push("bin");
         path.push(executable_name);
         if let Some(path) = probe(path) {
@@ -60,6 +60,19 @@ fn lookup_in_path(exec: &str) -> bool {
     env::split_paths(&paths).map(|path| path.join(exec)).find_map(probe).is_some()
 }
 
+fn get_cargo_home() -> Option<PathBuf> {
+    if let Some(path) = env::var_os("CARGO_HOME") {
+        return Some(path.into());
+    }
+
+    if let Some(mut path) = home::home_dir() {
+        path.push(".cargo");
+        return Some(path);
+    }
+
+    None
+}
+
 fn probe(path: PathBuf) -> Option<PathBuf> {
     let with_extension = match env::consts::EXE_EXTENSION {
         "" => None,