python-CI.yml

name: Python CI

on:
  push:
    branches:
      - main
      - '*'

jobs:
  build:
    runs-on: ubuntu-latest
    strategy:
      matrix:
        python-version: [3.8, 3.9, '3.10']

    steps:
      - uses: actions/checkout@v2
      - name: Set up Python ${{ matrix.python-version }}
        uses: actions/setup-python@v2
        with:
          python-version: ${{ matrix.python-version }}
      - name: Install dependencies
        run: |
          python -m pip install --upgrade pip
          pip install black
      - name: Check code formatting with Black on changed files
        run: |
          FILES=$(git diff --name-only ${{ github.event.before }} ${{ github.sha }} | grep '\.py$' | xargs)
          if [ ! -z "$FILES" ]; then
            # Check the formatting of those files with black
            black --check $FILES
          else
            echo "No Python files have changed."
          fi