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path: root/.github/workflows/screenshots.yml
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name: Visual Regression Tests

on:
  pull_request:
    types: [labeled, synchronize, opened, reopened]
    paths-ignore:
      - 'docs/**'

concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true

permissions:
  contents: read

jobs:
  selenium-screenshots:
    if: contains(join(github.event.pull_request.labels.*.name, '|'), 'screenshots')
    runs-on: ubuntu-latest
    name: Screenshots
    steps:
      - name: Checkout
        uses: actions/checkout@v4
      - name: Set up Python
        uses: actions/setup-python@v5
        with:
          python-version: '3.11'
          cache: 'pip'
          cache-dependency-path: 'tests/requirements/py3.txt'
      - name: Install and upgrade packaging tools
        run: python -m pip install --upgrade pip setuptools wheel
      - run: python -m pip install -r tests/requirements/py3.txt -e .

      - name: Run Selenium tests with screenshots
        working-directory: ./tests/
        run: python -Wall runtests.py --verbosity=2 --noinput --selenium=chrome --headless --screenshots --settings=test_sqlite --parallel=2

      - name: Cache oxipng
        uses: actions/cache@v4
        with:
          path: ~/.cargo/
          key: ${{ runner.os }}-cargo

      - name: Install oxipng
        run: which oxipng || cargo install oxipng

      - name: Optimize screenshots
        run: oxipng --interlace=0 --opt=4 --strip=safe tests/screenshots/*.png

      - name: Organize screenshots
        run: |
          mkdir --parents "/tmp/screenshots/${{ github.event.pull_request.head.sha }}"
          mv tests/screenshots/* "/tmp/screenshots/${{ github.event.pull_request.head.sha }}/"

      - name: Upload screenshots
        uses: actions/upload-artifact@v4
        with:
          name: screenshots-${{ github.event.pull_request.head.sha }}
          path: /tmp/screenshots/
          if-no-files-found: error