name: Auto updates messages.pot for readme_generator

on:
  push:
    branches: [main]

jobs:
  pybabel:
    name: Auto updates messages.pot for readme_generator
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - name: Set up Python 3.11
        uses: actions/setup-python@v5
        with:
          python-version: 3.11
          cache: pip

      - name: Install dependencies
        run: pip install -r requirements.txt

      - name: Save old messges.pot for diffing later
        run: |
          cd readme_generator/
          cp messages.pot messages.pot.old

      - name: Try to generate messages.pot
        run: |
          cd readme_generator/
          pybabel extract --ignore-dirs venv -F babel.cfg -o messages.pot .

      - name: Check if files changed
        run: |
          HAS_DIFF=$(python .github/diff_pot_files.py readme_generator/messages.pot.old readme_generator/messages.pot)
          echo "HAS_DIFF=$HAS_DIFF" >> $GITHUB_ENV

      - name: Create Pull Request
        if: ${{ env.HAS_DIFF == 'true' }}
        uses: peter-evans/create-pull-request@v6
        with:
          token: ${{ secrets.GITHUB_TOKEN }}
          title: "Update messages.pot for readme_generator"
          commit-message: "chore(readme_generator): update messages.pot"
          body: |
            This pull request has been generated using the command `pybabel extract --ignore-dirs venv -F babel.cfg -o messages.pot .`
          base: ${{ github.head_ref }} # Creates pull request onto pull request or commit branch
          branch: actions/auto_messages_pot