build_and_publish.yaml

name: Tag repo; build and publish assets
on:
  push:
    branches:
      - main

jobs:
  tag-new-version:
    runs-on: ubuntu-latest
    outputs:
      tag: ${{ steps.tag.outputs.new_tag }}
      version: ${{ steps.tag.outputs.new_version }}
    steps:
      - uses: actions/checkout@v3
        with:
          fetch-depth: 0
      - name: Bump version and push tag
        id: tag
        uses: mathieudutour/github-tag-action@v4.5
        with:
          github_token: ${{ secrets.GITHUB_TOKEN }}
          default_bump: false
          release_branches: main

  build-and-publish-package:
    runs-on: ubuntu-latest

    name: Build and publish PyPI package
    needs: tag-new-version
    if: needs.tag-new-version.outputs.tag
    steps:

    - name: Checkout
      uses: actions/checkout@v3
    - name: Set up Python 3.8
      uses: actions/setup-python@v4
      with:
        python-version: 3.8

    - name: Install wheel package
      run: |
        pip install wheel

    - name: Generate correct value for VERSION file
      run: |
        echo ${{ needs.tag-new-version.outputs.tag }} > opensafely/VERSION

    - name: Build package
      run: |
        python setup.py sdist bdist_wheel

    - name: Publish package
      uses: pypa/gh-action-pypi-publish@master
      if: needs.tag-new-version.outputs.tag
      with:
        user: __token__
        password: ${{ secrets.PYPI_PASSWORD }}

    # As well as uploading to PyPI it's useful to publish them as Github
    # Release Assets for use in contexts where we have access to Github but not
    # to PyPI
    - name: Create release
      id: create_release
      uses: actions/create-release@v1
      env:
        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
      with:
        tag_name: ${{ needs.tag-new-version.outputs.tag }}
        release_name: ${{ needs.tag-new-version.outputs.tag }}
        draft: false
        prerelease: false

    - name: Get release filenames
      id: get_release_filenames
      run: |
        cd dist
        whl_filename=$(ls *.whl | head -n 1)
        sdist_filename=$(ls *.tar.gz | head -n 1)
        echo "::set-output name=whl_filename::$whl_filename"
        echo "::set-output name=sdist_filename::$sdist_filename"

    - name: "Upload release asset: wheel"
      uses: actions/upload-release-asset@v1
      env:
        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
      with:
        upload_url: ${{ steps.create_release.outputs.upload_url }}
        asset_path: dist/${{ steps.get_release_filenames.outputs.whl_filename }}
        asset_name: ${{ steps.get_release_filenames.outputs.whl_filename }}
        asset_content_type: application/zip

    - name: "Upload release asset: sdist"
      uses: actions/upload-release-asset@v1
      env:
        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
      with:
        upload_url: ${{ steps.create_release.outputs.upload_url }}
        asset_path: dist/${{ steps.get_release_filenames.outputs.sdist_filename }}
        asset_name: ${{ steps.get_release_filenames.outputs.sdist_filename }}
        asset_content_type: application/gzip