name: Build macOS wheels

on: [push]

jobs:
  build:

    runs-on: macos-latest
    strategy:
      matrix:
        # macOS apparently doesn't support 3.4
        python-version: [3.5, 3.6, 3.7, 3.8]

    steps:
    - uses: actions/checkout@v2
    - name: Set up Python ${{ matrix.python-version }}
      uses: actions/setup-python@v1
      with:
        python-version: ${{ matrix.python-version }}
    - name: Build wheels
      run: |
        python -m pip install --upgrade pip wheel setuptools
        pip wheel . -w dist/
        ls dist/
    - name: Publish package to PyPI
      # Only actually publish if a new tag was pushed
      if: github.event_name == 'push' && startsWith(github.event.ref, 'refs/tags')
      # We can't use the pypa action because of https://github.com/pypa/gh-action-pypi-publish/issues/15
      run: |
        pip install twine
        TWINE_USERNAME="__token__" \
        TWINE_PASSWORD="${{ secrets.pypi_password }}" \
        twine upload dist/*