add cache path option

action.yml

@@ -19,13 +19,17 @@ inputs:
     description: 'Identifier for the Flutter SDK cache'
     required: false
     default: 'flutter'
+  cache-path:
+    description: 'Flutter SDK cache path'
+    required: false
+    default: ${{ runner.tool_cache }}/flutter
 runs:
   using: 'composite'
   steps:
     - if: ${{ inputs.cache == 'true' }}
       uses: actions/cache@v2
       with:
-        path: ${{ runner.tool_cache }}/flutter
+        path: ${{ inputs.cache-path }}
         key: ${{ inputs.cache-key }}-${{ inputs.channel }}-${{ inputs.flutter-version }}
-    - run: $GITHUB_ACTION_PATH/setup.sh ${{ inputs.channel }} ${{ inputs.flutter-version }}
+    - run: $GITHUB_ACTION_PATH/setup.sh -c "${{ inputs.cache-path }}" ${{ inputs.channel }} ${{ inputs.flutter-version }}
       shell: bash