name: Run Ruff and Auto-merge

on:
  pull_request:
    types: [opened, synchronize, reopened]

jobs:
  ruff-check:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout repository
        uses: actions/checkout@v4
        with:
          # Fetch all history for diffing
          fetch-depth: 0

      - name: Set up Python
        uses: actions/setup-python@v5
        with:
          python-version: '3.11' # Or your desired Python version

      - name: Install Ruff
        run: pip install ruff

      - name: Get changed files
        id: changed_files
        run: |
          # Get a list of changed files between the base and head commits of the PR
          git diff --name-only --diff-filter=d ${{ github.event.pull_request.base.sha }} ${{ github.event.pull_request.head.sha }} > changed_files.txt
          # Filter for Python files
          grep -E '\.py$' changed_files.txt > python_files.txt
          # Remove newlines and join with spaces
          echo "files=$(tr '\n' ' ' < python_files.txt)" >> $GITHUB_OUTPUT

      - name: Run Ruff on changed files
        if: steps.changed_files.outputs.files != ''
        run: |
          # The ruff command will only run if there are Python files to check
          ruff check ${{ steps.changed_files.outputs.files }}