Disable cache on nightly and clear cache every week

Closes #GSK-1774

Author: Hartorn

.github/workflows/build_backend.yml

@@ -14,13 +14,23 @@ on:
         required: true
         type: boolean
         default: false
+      use-cache:
+        description: 'If cache should be used'
+        required: true
+        type: boolean
+        default: true
   workflow_call:
     inputs:
       run-integration-tests:
         description: 'If integration test should be run'
         required: true
         type: boolean
         default: false
+      use-cache:
+        description: 'If cache should be used'
+        required: true
+        type: boolean
+        default: false
 env:
   GSK_DISABLE_ANALYTICS: true
 defaults:
@@ -77,10 +87,12 @@ jobs:
       - name: Setup Gradle # To cache ~/.gradle
         uses: gradle/gradle-build-action@v2
         with:
+          cache-disabled: ${{ github.event_name != 'pull_request' && !inputs.use-cache }} 
           cache-read-only: false
 
       - name: Cache SonarQube packages
         uses: actions/cache@v3
+        if: ${{ github.event_name == 'pull_request' || inputs.use-cache }} 
         with:
           path: ~/.sonar/cache
           key: ${{ runner.os }}-sonar
@@ -112,10 +124,12 @@ jobs:
       - name: Setup Gradle # To cache ~/.gradle
         uses: gradle/gradle-build-action@v2
         with:
+          cache-disabled: ${{ github.event_name != 'pull_request' && !inputs.use-cache }} 
           cache-read-only: false
 
       - name: Cache Frontend dependencies
         uses: actions/cache@v3
+        if: ${{ github.event_name == 'pull_request' || inputs.use-cache }} 
         with:
           path: frontend/node_modules
           key: ${{ runner.os }}-frontend-${{ hashFiles('frontend/package-lock.json')}}
@@ -168,6 +182,7 @@ jobs:
 
       - name: Cache Python deps
         uses: actions/cache@v3
+        if: ${{ github.event_name == 'pull_request' || inputs.use-cache }} 
         with:
           path: python-client/.venv
           key: ${{ matrix.os }}-${{ matrix.python-version }}-python-deps-${{ hashFiles('python-client/tests/fixtures/**/*py')}}
@@ -186,6 +201,7 @@ jobs:
 
       - name: Cache Giskard test resources
         uses: actions/cache@v3
+        if: ${{ github.event_name == 'pull_request' || inputs.use-cache }} 
         with:
           path: ~/.giskard
           key: ${{ matrix.os }}-${{ matrix.python-version }}-python-test-resources-${{ hashFiles('python-client/tests/fixtures/**/*py')}}

.github/workflows/clear-cache.yml

@@ -0,0 +1,18 @@
+name: Clear all caches
+on:
+  workflow_dispatch:
+  schedule: 
+    - cron: '0 0 * * 0' # Every week
+
+permissions:
+    actions: write
+
+jobs:
+  clear:
+    name: Clear all cache
+    runs-on: ubuntu-latest
+    steps:
+      - name: Clear cache
+        run: gh cache delete --all
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/nightly-test.yml

@@ -8,4 +8,5 @@ jobs:
   call-full-ci:
     uses: ./.github/workflows/build_backend.yml
     with:
-      run-integration-tests: true
+      run-integration-tests: true
+      use-cache: false