---
name: build

on: [
  push,
  pull_request
]

env:
  PIP_CACHE_DIR: ~/.cache/pip
  PRE_COMMIT_CACHE_DIR: ~/.cache/pre-commit

jobs:
  lint:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v2
      - uses: actions/setup-python@v1
        with:
          python-version: 3.8
      - name: Store installed Python version
        run: |
          echo "::set-env name=PY_VERSION::"\
          "$(python -c "import platform;print(platform.python_version())")"
      - name: Cache pip test requirements
        uses: actions/cache@v1
        with:
          path: ${{ env.PIP_CACHE_DIR }}
          key: "${{ runner.os }}-pip-test-py${{ env.PY_VERSION }}-\
            ${{ hashFiles('**/requirements-test.txt') }}"
          restore-keys: |
            ${{ runner.os }}-pip-test-py${{ env.PY_VERSION }}-
            ${{ runner.os }}-pip-test-
            ${{ runner.os }}-pip-
      - name: Cache pre-commit hooks
        uses: actions/cache@v1
        with:
          path: ${{ env.PRE_COMMIT_CACHE_DIR }}
          key: "${{ runner.os }}-pre-commit-py${{ env.PY_VERSION }}-\
            ${{ hashFiles('**/.pre-commit-config.yaml') }}"
      - name: Install dependencies
        run: |
          python -m pip install --upgrade pip
          pip install --upgrade --requirement requirements-test.txt
      - name: Set up pre-commit hook environments
        run: pre-commit install-hooks
      - name: Run pre-commit on all files
        run: pre-commit run --all-files