name: Commit messages check
on:
  pull_request:

jobs:
  gitlint:
    name: Check commit messages
    runs-on: ubuntu-latest
    steps:
    - name: Checkout repository
      uses: actions/checkout@v4
      with:
        ref: ${{ github.event.pull_request.head.sha }}
        fetch-depth: 0
    - name: Set up Python 3.10
      uses: actions/setup-python@v3
      with:
        python-version: "3.10"
    - name: Install dependencies
      run: |
        python -m pip install --upgrade pip
        pip install --upgrade gitlint
    - name: Lint git commit messages
      run: |
        gitlint --commits origin/$GITHUB_BASE_REF..