gh-action-pypi-publish/.github/workflows/publish-major-minor.yml

name: "Publish Major-Minor-Tags"
on:
  push:
    tags:
      - "v*"

jobs:
  push-tags:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v2
      - name: Set up Python 3.8
        uses: actions/setup-python@v2
        with:
          python-version: 3.8
      - name: Install packaging
        run: python -m pip install -U packaging --user
      - name: Get versions
        id: get_versions
        shell: python
        run: |
          from packaging.version import parse

          tag_ref = "${{ github.ref }}"
          tag_name = tag_ref.split("/")[-1]
          version = parse(tag_name)
          print(f"tag_name: {tag_name}")
          print(f"version: {version}")
          if version.is_prerelease:
              print("No tags created (dev or pre version)!")
              exit(0)

          print("Creating new major and minor tags!")
          print(f"::set-output name=original_tag_name::{tag_name}")
          print(f"::set-output name=major_version::v{version.major}")
          print(f"::set-output name=minor_version::v{version.major}.{version.minor}")      
      - name: Setup git user as [bot]
        run: |
          git config user.email 'github-actions[bot]@users.noreply.github.com'
          git config user.name 'github-actions[bot]'
      - name: Create major + minor tags
        if: steps.get_versions.outputs.original_tag_name != ''
        env:
          original_tag_name: ${{ steps.get_versions.outputs.original_tag_name }}
          major_version: ${{ steps.get_versions.outputs.major_version }}
          minor_version: ${{ steps.get_versions.outputs.minor_version }}
        run: |
          git tag --annotate '${{ env.major_version }}' \
            --message='Major version tag of: ${{ env.original_tag_name }}' \
            --message="Original tag SHA1: $(git rev-parse ${{ env.original_tag_name }})"
          git tag --annotate '${{ env.minor_version }}' \
            --message='Minor version tag of: ${{ env.original_tag_name }}' \
            --message="Original tag SHA1: $(git rev-parse ${{ env.original_tag_name }})"
      - name: Push major + minor tags
        if: steps.get_versions.outputs.original_tag_name != ''
        env:
          major_version: ${{ steps.get_versions.outputs.major_version }}
          minor_version: ${{ steps.get_versions.outputs.minor_version }}
        run: |
          git push --force --atomic origin \
            '${{ env.major_version }}' \
            '${{ env.minor_version }}'