name: Lint

on: [push, pull_request]

jobs:
  build:

    runs-on: ubuntu-latest

    name: Lint

    steps:
    - uses: actions/checkout@v2

    - name: pip cache
      uses: actions/cache@v2
      with:
        path: ~/.cache/pip
        key: lint-pip-${{ hashFiles('**/setup.py') }}
        restore-keys: |
          lint-pip-

    - name: pre-commit cache
      uses: actions/cache@v2
      with:
        path: ~/.cache/pre-commit
        key: lint-pre-commit-${{ hashFiles('**/.pre-commit-config.yaml') }}
        restore-keys: |
          lint-pre-commit-

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

    - name: Build system information
      run: python3 .github/workflows/system-info.py

    - name: Install dependencies
      run: |
        python3 -m pip install -U pip
        python3 -m pip install -U tox

    - name: Lint
      run: tox -e lint
      env:
        PRE_COMMIT_COLOR: always