rm cache enhancements (#118)

* rm cache enhancements

* add rm cache tests'

* add return

Author: anandhu-eng

.github/workflows/test-mlc-core-actions.yaml

@@ -241,6 +241,15 @@ jobs:
       run: |
         mlc pull repo mlcommons@mlperf-automations --checkout=dev
 
+    - name: Test for rm cache - invalid cache entry tags(test succeeds if command fails)
+      run: |
+        ! mlc rm cache --tags=sample,invalid,tags
+
+    - name: Test for rm cache when the cache folder is empty(only for mlc rm cache without specifying particular script)
+      run: |
+        mlc rm cache -f
+        mlc rm cache -f
+
     - name: Run tests from test-mlc-access.py
       run: |
         cd .github/scripts && python -c "import test_mlc_access as test; test.run_tests()"

mlc/action.py

@@ -337,7 +337,12 @@ def rm(self, i):
             return res
 
         if len(res['list']) == 0:
-            return {'return': 16, 'error': f'No {target_name} found for {inp}'}
+            # Do not error out if fetch_all is used
+            if inp["fetch_all"] == True:
+                logger.warning(f"{target_name} is empty! nothing to be cleared!")
+                return {"return": 0}
+            else:
+                return {'return': 16, 'error': f'No {target_name} found for {inp}'}
         elif len(res['list']) > 1:
             logger.info(f"More than 1 {target_name} found for {inp}:")
             if not i.get('all'):