5 files changed, 22 insertions, 14 deletions

diff --git a/Cargo.lock b/Cargo.lock
index 7de784c1c..e1da335f5 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1119,6 +1119,7 @@ dependencies = [
  "memmap",
  "ra_mbe",
  "ra_proc_macro",
+ "ra_toolchain",
  "ra_tt",
  "serde_derive",
  "test_utils",
diff --git a/crates/ra_proc_macro_srv/Cargo.toml b/crates/ra_proc_macro_srv/Cargo.toml
index bb3003278..582102945 100644
--- a/crates/ra_proc_macro_srv/Cargo.toml
+++ b/crates/ra_proc_macro_srv/Cargo.toml
@@ -22,3 +22,4 @@ cargo_metadata = "0.10.0"
 difference = "2.0.0"
 # used as proc macro test target
 serde_derive = "1.0.106"
+ra_toolchain = { path = "../ra_toolchain" }
diff --git a/crates/ra_proc_macro_srv/src/tests/utils.rs b/crates/ra_proc_macro_srv/src/tests/utils.rs
index 84348b5de..8d85f2d8a 100644
--- a/crates/ra_proc_macro_srv/src/tests/utils.rs
+++ b/crates/ra_proc_macro_srv/src/tests/utils.rs
@@ -2,7 +2,6 @@
 
 use crate::dylib;
 use crate::ProcMacroSrv;
-pub use difference::Changeset as __Changeset;
 use ra_proc_macro::ListMacrosTask;
 use std::str::FromStr;
 use test_utils::assert_eq_text;
@@ -13,7 +12,7 @@ mod fixtures {
 
     // Use current project metadata to get the proc-macro dylib path
     pub fn dylib_path(crate_name: &str, version: &str) -> std::path::PathBuf {
-        let command = Command::new("cargo")
+        let command = Command::new(ra_toolchain::cargo())
             .args(&["check", "--message-format", "json"])
             .output()
             .unwrap()
diff --git a/crates/rust-analyzer/src/main_loop/handlers.rs b/crates/rust-analyzer/src/main_loop/handlers.rs
index 1b5b3325c..d42cfa300 100644
--- a/crates/rust-analyzer/src/main_loop/handlers.rs
+++ b/crates/rust-analyzer/src/main_loop/handlers.rs
@@ -427,7 +427,7 @@ pub fn handle_runnables(
                 res.push(lsp_ext::Runnable {
                     range: Default::default(),
                     label: format!("cargo {} -p {}", cmd, spec.package),
-                    bin: "cargo".to_string(),
+                    bin: cargo_path()?,
                     args: vec![cmd.to_string(), "--package".to_string(), spec.package.clone()],
                     extra_args: Vec::new(),
                     env: FxHashMap::default(),
@@ -439,7 +439,7 @@ pub fn handle_runnables(
             res.push(lsp_ext::Runnable {
                 range: Default::default(),
                 label: "cargo check --workspace".to_string(),
-                bin: "cargo".to_string(),
+                bin: cargo_path()?,
                 args: vec!["check".to_string(), "--workspace".to_string()],
                 extra_args: Vec::new(),
                 env: FxHashMap::default(),
@@ -450,6 +450,13 @@ pub fn handle_runnables(
     Ok(res)
 }
 
+fn cargo_path() -> Result<String> {
+    Ok(ra_toolchain::cargo()
+        .to_str()
+        .context("Path to `cargo` executable contains invalid UTF8 characters")?
+        .to_owned())
+}
+
 pub fn handle_completion(
     world: WorldSnapshot,
     params: lsp_types::CompletionParams,
@@ -983,15 +990,11 @@ fn to_lsp_runnable(
             target.map_or_else(|| "run binary".to_string(), |t| format!("run {}", t))
         }
     };
-    let cargo_path = ra_toolchain::cargo()
-        .to_str()
-        .context("Path to cargo executable contains invalid UTF8 characters")?
-        .to_owned();
 
     Ok(lsp_ext::Runnable {
         range: to_proto::range(&line_index, runnable.range),
         label,
-        bin: cargo_path,
+        bin: cargo_path()?,
         args,
         extra_args,
         env: {
diff --git a/crates/rust-analyzer/tests/heavy_tests/main.rs b/crates/rust-analyzer/tests/heavy_tests/main.rs
index 405ddb362..a31580c86 100644
--- a/crates/rust-analyzer/tests/heavy_tests/main.rs
+++ b/crates/rust-analyzer/tests/heavy_tests/main.rs
@@ -58,6 +58,10 @@ use std::collections::Spam;
     eprintln!("completion took {:?}", completion_start.elapsed());
 }
 
+fn cargo_path() -> String {
+    ra_toolchain::cargo().to_str().unwrap().to_owned()
+}
+
 #[test]
 fn test_runnables_no_project() {
     if skip_slow_tests() {
@@ -79,7 +83,7 @@ fn foo() {
           {
             "args": [ "test" ],
             "extraArgs": [ "foo", "--nocapture" ],
-            "bin": "cargo",
+            "bin": cargo_path(),
             "env": { "RUST_BACKTRACE": "short" },
             "cwd": null,
             "label": "test foo",
@@ -91,7 +95,7 @@ fn foo() {
           {
             "args": ["check", "--workspace"],
             "extraArgs": [],
-            "bin": "cargo",
+            "bin": cargo_path(),
             "env": {},
             "cwd": null,
             "label": "cargo check --workspace",
@@ -141,7 +145,7 @@ fn main() {}
             {
               "args": [ "test", "--package", "foo", "--test", "spam" ],
               "extraArgs": [ "test_eggs", "--exact", "--nocapture" ],
-              "bin": "cargo",
+              "bin": cargo_path(),
               "env": { "RUST_BACKTRACE": "short" },
               "label": "test test_eggs",
               "range": {
@@ -153,7 +157,7 @@ fn main() {}
             {
               "args": [ "check", "--package", "foo" ],
               "extraArgs": [],
-              "bin": "cargo",
+              "bin": cargo_path(),
               "env": {},
               "label": "cargo check -p foo",
               "range": {
@@ -165,7 +169,7 @@ fn main() {}
             {
               "args": [ "test", "--package", "foo" ],
               "extraArgs": [],
-              "bin": "cargo",
+              "bin": cargo_path(),
               "env": {},
               "label": "cargo test -p foo",
               "range": {