lint.yml

name: Lint
on: [pull_request]

jobs:
  lint:
    strategy:
      matrix:
        python-version: ['3.10']
        os: [ubuntu-latest]
    runs-on: ${{ matrix.os }}
    timeout-minutes: 30
    steps:
    - uses: actions/checkout@v2
    - name: Cache for pip
      uses: actions/cache@v1
      id: cache-pip
      with:
        path: ~/.cache/pip
        key: ${{ matrix.os }}-cache-pip

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

    - name: Critical lint
      run: |
        pip install flake8
        # https://michaelcurrin.github.io/dev-cheatsheets/cheatsheets/python/linting/flake8.html
        flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics

    - name: Style lint
      run: |
        flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --ignore=C901,W503,W504,E741 --statistics > current.txt
        git fetch origin
        git checkout origin/"$GITHUB_BASE_REF"
        flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --ignore=C901,W503,W504,E741 --statistics > base.txt
        if diff base.txt current.txt | grep "^> ./"; then
          false
        fi