version.yml

name: Check version

on:
  pull_request:
    branches: master

jobs:
  check-version:
    name: Package version updated
    runs-on: ubuntu-latest
    
    steps:
      - uses: actions/setup-python@v4
        with:
          python-version: '3.10'

      - uses: actions/checkout@v4
        with:
          submodules: recursive

      - name: Retrieve new version number
        id: new-version
        run: |
          echo "version=$(python setup.py --version)" >> "$GITHUB_OUTPUT"

      - uses: actions/checkout@v4
        with:
          submodules: recursive
          ref: ${{ github.base_ref }}

      - name: Retrieve target branch version number
        id: target-version
        run: |
          echo "version=$(python setup.py --version)" >> "$GITHUB_OUTPUT"

      - name: Compare version numbers
        env:
          NEW_VERSION: ${{ steps.new-version.outputs.version }}
          TARGET_VERSION: ${{ steps.target-version.outputs.version }}
        run: |
          ! (printf '%s\n' "$NEW_VERSION" "$TARGET_VERSION" | sort -C -V)