black.yml

name: Python Black Formatting

on:
  push:
    branches:
      - main
  pull_request:
    branches:
      - main

jobs:
  run-black:
    name: Black ${{ matrix.black-version }}

    # Using matrix just to get variables which are not environmental variables
    # and also to sync with other workflows which use matrix.
    strategy:
      matrix:
        include:
          - os: ubuntu-20.04
            python-version: "3.10"
            black-version: "22.3.0"

    runs-on: ${{ matrix.os }}

    steps:
      - uses: actions/checkout@v2

      - name: Set up Python
        uses: actions/setup-python@v2
        with:
          python-version: ${{ matrix.python-version }}

      - name: Install
        run: |
          python -m pip install --upgrade pip
          pip install black==${{ matrix.black-version }}

      - name: Run Black
        run: |
          black --check --diff --line-length 79 .