release.yml

# Create a release using the version number from the Python package
#
# This workflow is designed to create a GitHub release whenever a pull request
# is merged to the main branch that updates the version number for this repo's
# Python package.
#
# The release is created with the tag and name of the version number.
#
# If there already exists a tag for the package version number the release
# should not be created.

name: Create a GitHub release

on:
  push:
    branches:
      - main

jobs:
  release:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4

      - uses: actions/setup-python@v4
        with:
          python-version: '3.8'

      - name: Get package version
        id: package_version
        run: echo "::set-output name=python::"$(python setup.py --version)

      - name: Check if version tag already exists
        id: version_tag
        uses: mukunku/tag-exists-action@78009d2b13e10ba051fe68d8d2f6778a9b2adab3
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        with:
          tag: ${{ steps.package_version.outputs.python }}

      - name: Create GitHub release
        if: ${{ steps.version_tag.outputs.exists == 'false' }}
        uses: actions/create-release@v1
        env:
          GITHUB_TOKEN: ${{ secrets.DM_GITHUB_TOKEN }}
        with:
          tag_name: ${{ steps.package_version.outputs.python }}
          release_name: Release v${{ steps.package_version.outputs.python }}