fixup! Add CI for Base Browser

Bug 42722: Cache mozbuild path instead of specifically the pip path

.gitlab/ci/lint.yml

@@ -2,11 +2,15 @@
   stage: lint
   interruptible: true
   variables:
-    PIP_CACHE_DIR: "$CI_PROJECT_DIR/.cache/pip"
+    MOZBUILD_STATE_PATH: "$CI_PROJECT_DIR/.cache/mozbuild"
   cache:
     paths:
       - node_modules
-      - .cache/pip
+      - .cache/mozbuild
+    # Store the cache regardless on job outcome
+    when: 'always'
+    # Share the cache throughout all pipelines running for a given branch
+    key: $CI_COMMIT_REF_SLUG
 
 eslint:
   extends: .base

.gitlab/ci/scripts/run_linters.py

@@ -98,13 +98,13 @@ if __name__ == "__main__":
     )
     args = parser.parse_args()
 
-    command = [
-        "./mach",
-        "lint",
-        "-v",
-        *(s for l in args.linters for s in ("-l", l)),
-        *get_list_of_changed_files(),
-    ]
-    result = subprocess.run(command, text=True)
-
-    sys.exit(result.returncode)
+    changed_files = get_list_of_changed_files()
+    if changed_files:
+        command = ["./mach", "lint", "-v"]
+        for linter in args.linters:
+            command.extend(["-l", linter])
+        command.extend(changed_files)
+        result = subprocess.run(command, text=True)
+        sys.exit(result.returncode)
+    else:
+        print("No files changed, skipping linting.")