new-tag.yml

name: tag
on:
  push:
    branches:
    - main
    paths:
    - source/**
  workflow_dispatch: # todo: remove this demo trigger!
jobs:
  tag:
    runs-on: ubuntu-latest
    steps:
    - name: Install xmllint
      run: sudo apt install libxml2-utils
    - uses: actions/checkout@v4
      with:
        ssh-key: "${{ secrets.COMMIT_KEY }}"
    - name: Set the version
      run: |
        shopt -s extglob
        for file in ./source/**/!(*Test*(s)|*UnitTest*(s)).csproj; do
          prefix="$(echo "cat /Project/PropertyGroup/VersionPrefix/text()" | xmllint --nocdata --shell "$file" | sed '1d;$d')"
          if [[ $prefix ]]; then
            break
          fi
        done
        suffix="${{ format('pre.{0}', github.run_number) }}"
        echo "VERSION=v${prefix:-1.0.0}-$suffix" >> $GITHUB_ENV
    - name: Create tag
      run: |
        git tag ${{ env.VERSION }}
        git push origin ${{ env.VERSION }}