name: Black

on:
  push:
    branches: [ master, stable ]
  pull_request:
    branches: [ master, stable ]

jobs:
  black:
    runs-on: ubuntu-latest
    steps:
    - uses: actions/checkout@v2

    - name: Set up Python
      uses: actions/setup-python@v2
      with:
        python-version: 3.8

    - name: Install dependencies
      run: |
        pip install --upgrade pip
        pip install black

    - name: Black check
      run: |
        black --check butterrobot