check_no_SNAPSHOT_master.yml

name: No SNAPSHOT version on master branch

on:
  pull_request:
    branches:
    - master

jobs:
  test:
    runs-on: ubuntu-latest
    steps:
      - name: Set up Python
        uses: actions/setup-python@v2
        with:
          python-version: '3.8'
      # PRs to the repository master branch are only ok if coming from any patch or release branch
      - name: Install cookietemple
        run: pip install cookietemple

      - name: Check project version
        run: |
            PROJECTVERSION=$(cookietemple bump-version --project-version . | tail -n1)
            echo $PROJECTVERSION;
            if [[ $PROJECTVERSION == *"SNAPSHOT"* ]];then
                exit -1
            else
                exit 0
            fi

      # If the above check failed, post a comment on the PR explaining the failure
      # NOTE - this may not work if the PR is coming from a fork, due to limitations in GitHub actions secrets
      - name: Post PR comment
        if: failure()
        uses: mshick/add-pr-comment@v1
        with:
          message: |
            Hi @${{ github.event.pull_request.user.login }},

            It looks like this pull-request is has been made against the ${{github.event.pull_request.head.repo.full_name}} `master` branch.
            A version check determined that you are using a SNAPSHOT version.
            The `master` branch should never have any SNAPSHOT versions, since only fully stable code should be on the `master` branch.
          repo-token: ${{ secrets.GITHUB_TOKEN }}
          allow-repeats: false