black.yml

# This workflow will install Python dependencies and run flake8.

name: Python black checks

on:
  push:
    branches: [ master ]
  pull_request:
    branches: [ '**' ]

jobs:
  build:

    runs-on: ubuntu-16.04
    strategy:
      max-parallel: 4
      matrix:
        python-version: [3.7, 3.x]

    steps:
    - uses: actions/checkout@v2

    - uses: actions/cache@v1
      with:
        path: ~/.cache/pip
        key: ${{ runner.os }}-black-${{ matrix.python-version }}-pip-${{ hashFiles('**/requirements.txt') }}
        restore-keys: |
          ${{ runner.os }}-black-${{ matrix.python-version }}-pip-

    - name: Set up Python ${{ matrix.python-version }}
      uses: actions/setup-python@v1
      with:
        python-version: ${{ matrix.python-version }}

    - name: Display Python version
      run: python -c "import platform; print(platform.python_version(), platform.platform())"

    - name: Install dependencies
      run: |
        python -m pip install --upgrade pip
        pip install pre-commit
        pip install -r requirements.txt

    - name: Lint with black
      run: |
        pre-commit run --all-files