Add new Github workflow for themes screenshots

Author: mathoudebine

.github/workflows/themes-screenshot.yml

@@ -0,0 +1,65 @@
+name: System monitor - themes screenshot
+
+on:
+  push:
+    branches:
+      - main
+      - 'releases/**'
+  pull_request:
+
+jobs:
+  system-monitor:
+
+    runs-on: ubuntu-latest
+
+    strategy:
+      fail-fast: false
+      matrix:
+        theme: [ "3.5inchTheme2", "Cyberpunk", "Cyberpunk-net", "Landscape6Grid", "Terminal", "bash-dark-green", "bash-dark-green-gpu",
+                 "LandscapeMagicBlue", "BigClock" ]
+
+    steps:
+    - uses: actions/checkout@v3
+    - name: Set up Python 3.10
+      uses: actions/setup-python@v4
+      with:
+        python-version: 3.10
+
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip
+        python -m pip install -r requirements.txt
+
+    - name: Configure system monitor for screenshot
+      run: |
+        # For tests there is no real HW: use simulated LCD mode
+        sed -i "/REVISION:/c\  REVISION: SIMU" config.yaml
+        
+        # Use static data
+        sed -i "/HW_SENSORS:/c\  HW_SENSORS: STATIC" config.yaml
+
+    - name: Run system monitor for 5 seconds on all themes
+      run: |
+        for dir in res/themes/*/
+        do
+          # Remove the trailing "/"
+          theme=${dir%*/}
+        
+          # Setup selected theme in config.yaml
+          echo "Using theme $theme"
+          sed -i "/THEME:/c\  THEME: $theme" config.yaml
+  
+          # Run system-monitor for 5 seconds
+          python3 main.py > output.log 2>&1 &
+          sleep 5
+          killall -9 python3
+        
+          # Rename screen capture
+          cp screencap.png screenshot-$theme.png
+        done
+
+    - name: Archive screenshots
+      uses: actions/upload-artifact@v3
+      with:
+        name: themes-screenshots
+        path: screenshot-*.png