Rollup merge of #122081 - onur-ozkan:validate-path-remaps, r=clubby789

validate `builder::PATH_REMAP`

self-explanatory

r? clubby789

src/bootstrap/src/core/builder.rs

@@ -291,7 +291,7 @@ impl PathSet {
 const PATH_REMAP: &[(&str, &[&str])] = &[
     // config.toml uses `rust-analyzer-proc-macro-srv`, but the
     // actual path is `proc-macro-srv-cli`
-    ("rust-analyzer-proc-macro-srv", &["proc-macro-srv-cli"]),
+    ("rust-analyzer-proc-macro-srv", &["src/tools/rust-analyzer/crates/proc-macro-srv-cli"]),
     // Make `x test tests` function the same as `x t tests/*`
     (
         "tests",

src/bootstrap/src/core/builder/tests.rs

@@ -115,6 +115,19 @@ fn test_intersection() {
     assert_eq!(command_paths, vec![Path::new("library/stdarch")]);
 }
 
+#[test]
+fn validate_path_remap() {
+    let build = Build::new(configure("test", &["A"], &["A"]));
+
+    PATH_REMAP
+        .iter()
+        .flat_map(|(_, paths)| paths.iter())
+        .map(|path| build.src.join(path))
+        .for_each(|path| {
+            assert!(path.exists(), "{} should exist.", path.display());
+        });
+}
+
 #[test]
 fn test_exclude() {
     let mut config = configure("test", &["A"], &["A"]);