actions/cache integration

.github/workflows/workflow.yml

@@ -72,19 +72,20 @@ jobs:
     - name: Run flutter --version
       shell: bash
       run: flutter --version
-  test_with_cache:
-    runs-on: ubuntu-latest
+  test_cache:
+    runs-on: ${{ matrix.operating-system }}
+    strategy:
+      matrix:
+        operating-system: [ubuntu-latest, windows-latest, macos-latest]
     steps:
     - name: Checkout
       uses: actions/checkout@v2
-    - uses: actions/cache@v2
-      with:
-        path: ${{ runner.tool_cache }}/flutter
-        key: flutter-2.5.0-stable
     - uses: ./
       with:
         channel: stable
         flutter-version: 2.5.0
+        cache: true
+        cache-key: key-20220110
     - name: Run dart --version
       shell: bash
       run: dart --version

README.md

@@ -146,18 +146,16 @@ jobs:
      - run: flutter build macos
 ```
 
-Integration with actions/cache:
+Integration with `actions/cache`:
 
 ```yaml
 steps:
 - uses: actions/checkout@v2
-- uses: actions/cache@v2
-  with:
-    path: ${{ runner.tool_cache }}/flutter
-    key: flutter-2.5.0-stable
 - uses: subosito/flutter-action@v2
   with:
     channel: stable
     flutter-version: 2.5.0
+    cache: true
+    cache-key: flutter # optional, change this to force refresh cache
 - run: flutter --version
 ```

action.yml

@@ -12,8 +12,20 @@ inputs:
     description: 'The Flutter build release channel'
     required: false
     default: 'stable'
+  cache:
+    description: 'Cache the Flutter SDK'
+    required: false
+  cache-key:
+    description: 'Identifier for the Flutter SDK cache'
+    required: false
+    default: 'flutter'
 runs:
   using: 'composite'
   steps:
+    - if: ${{ inputs.cache == 'true' }}
+      uses: actions/cache@v2
+      with:
+        path: ${{ runner.tool_cache }}/flutter
+        key: ${{ inputs.cache-key }}-${{ inputs.channel }}-${{ inputs.flutter-version }}
     - run: $GITHUB_ACTION_PATH/setup.sh ${{ inputs.channel }} ${{ inputs.flutter-version }}
       shell: bash