name: >-
  👷
  Test suite

on:
  push:
  pull_request:
  schedule:
  - cron: 1 0 * * *  # Run daily at 0:01 UTC

jobs:
  tests:
    name: >-
      ${{ matrix.python-version }}
      /
      ${{ matrix.os }}
    runs-on: ${{ matrix.os }}
    strategy:
      # max-parallel: 5
      matrix:
        python-version:
        - 3.9
        - 3.8
        - pypy3
        - 3.7
        - 3.6
        os:
        - ubuntu-18.04
        - ubuntu-16.04
        - macOS-latest
        # - windows-2019
        # - windows-2016
        include:
        # Dev versions (deadsnakes)
        - os: ubuntu-20.04
          python-version: 3.9-dev
        - os: ubuntu-20.04
          python-version: 3.8-dev

    env:
      NETWORK_REQUIRED: 1
      PYTHON_VERSION: ${{ matrix.python-version }}
      TOX_PARALLEL_NO_SPINNER: 1
      TOXENV: python
      USE_DEADSNAKES: false

    steps:
    - uses: actions/checkout@master
    - name: Set flag to use deadsnakes
      if: >-
        endsWith(env.PYTHON_VERSION, '-beta') || 
        endsWith(env.PYTHON_VERSION, '-dev')
      # FIXME: replace `set-env` with a newer alternative
      # Refs:
      # * github.blog/changelog/2020-10-01-github-actions-deprecating-set-env-and-add-path-commands/
      env:
        ACTIONS_ALLOW_UNSECURE_COMMANDS: true
      run: |
        from __future__ import print_function
        import os
        python_version = '${{ env.PYTHON_VERSION }}'.replace('-beta', '')
        with open(os.environ['GITHUB_ENV'], 'a') as env_file:
            env_file.write('PYTHON_VERSION={ver}\n'.format(ver=python_version))
            env_file.write('USE_DEADSNAKES=true\n')
      shell: python
    - name: Set up Python ${{ env.PYTHON_VERSION }} (deadsnakes)
      uses: deadsnakes/action@v2.0.1
      if: fromJSON(env.USE_DEADSNAKES) && true || false
      with:
        python-version: ${{ env.PYTHON_VERSION }}
    - name: Set up Python ${{ env.PYTHON_VERSION }}
      uses: actions/setup-python@v2
      if: >-
        !fromJSON(env.USE_DEADSNAKES) && true || false
      with:
        python-version: ${{ env.PYTHON_VERSION }}
    - name: Log Python version
      run: >-
        python --version
    - name: Log Python location
      run: >-
        which python
    - name: Log Python env
      run: >-
        python -m sysconfig
    - name: Pip cache
      uses: actions/cache@v2
      with:
        path: ~/.cache/pip
        key: ${{ runner.os }}-pip-${{ hashFiles('setup.cfg') }}
        restore-keys: |
          ${{ runner.os }}-pip-
          ${{ runner.os }}-
    - name: Upgrade pip/setuptools/wheel
      run: >-
        python
        -m pip install
        --disable-pip-version-check
        --upgrade
        pip setuptools wheel
    - name: Install tox
      run: >-
        python -m pip install --upgrade tox tox-venv
    - name: Log installed dists
      run: >-
        python -m pip freeze --all
    - name: Adjust TOXENV for PyPy
      if: startsWith(env.PYTHON_VERSION, 'pypy')
      run: >-
        echo "TOXENV=${{ env.PYTHON_VERSION }}"
        >>
        "${GITHUB_ENV}"
    - name: Log env vars
      run: >-
        env

    - name: Verify that there's no cached Python modules in sources
      if: >-
        ! startsWith(matrix.os, 'windows-')
      run: >-
        ! grep pyc setuptools.egg-info/SOURCES.txt

    - name: 'Initialize tox envs: ${{ matrix.env.TOXENV }}'
      run: >-
        python -m
        tox
        --parallel auto
        --parallel-live
        --notest
        --skip-missing-interpreters false
    - name: Test with tox
      run: >-
        python -m
        tox
        --parallel auto
        --parallel-live
        --
        -vvvvv