AutoTag.yml

name: AutoTag
on:
  push:
    branches:
      - master
    paths:
      - 'Project.toml'
jobs:
  tag:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 2
      - name: Check version change and tag
        run: |
          VERSION=$(grep '^version' Project.toml | sed 's/version = "\(.*\)"/\1/')
          TAG="v$VERSION"

          if git ls-remote --tags origin | grep -q "refs/tags/$TAG$"; then
            echo "Tag $TAG already exists, skipping"
            exit 0
          fi

          git show HEAD^:Project.toml > /tmp/old_project.toml 2>/dev/null || echo 'version = "0.0.0"' > /tmp/old_project.toml
          OLD_VERSION=$(grep '^version' /tmp/old_project.toml | sed 's/version = "\(.*\)"/\1/')

          if [ "$VERSION" != "$OLD_VERSION" ]; then
            echo "Version changed from $OLD_VERSION to $VERSION, creating tag $TAG"
            git config user.name "github-actions[bot]"
            git config user.email "github-actions[bot]@users.noreply.github.com"
            git tag "$TAG"
            git push origin "$TAG"
          else
            echo "Version unchanged ($VERSION), skipping"
          fi