name: Release

on:
  schedule:
    # Run on every first day of the month
    - cron: '0 0 1 * *'
  push:
    tags:
      - '**'

jobs:

  changelog:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v6
        with:
          fetch-depth: 0

      - name: Set version
        id: set_version
        # Set version depending on whether this is a regular monthly release or
        # a custom release triggered by a tag push.
        run: |
          if [ "${{ github.event_name }}" == "push" ]; then
            VERSION=${{ github.ref_name }}
          else
            VERSION=$(date +'%y.%m.0')
          fi
          echo "VERSION=$VERSION"
          echo "VERSION=$VERSION" >> "$GITHUB_OUTPUT"

      - name: Generate Changelog
        id: changelog
        uses: orhun/git-cliff-action@v4
        with:
            config: cliff.toml
            # Consider the changes from the pushed tag (latest) when running due to a
            # tag push and consider unreleased changes when this is a regular monthly
            # release. This is necessary, because on monthly releases, the tag is created later.
            args: --verbose $( [ "${{github.event_name }}" == "push" ] && echo --latest || echo --unreleased --tag ${{ steps.set_version.outputs.VERSION }} )
        env:
            OUTPUT: CHANGELOG.md
            GITHUB_REPO: ${{ github.repository }}

      - name: Check Changelog
        id: check_changelog
        # Test if the changelog contains any entries
        run: test -n "${{ steps.changelog.outputs.content }}"
        continue-on-error: true

    outputs:
      changeLogOutcome: ${{ steps.check_changelog.outcome }}
      changelog: ${{ steps.changelog.outputs.content }}
      version: ${{ steps.set_version.outputs.VERSION }}

  release:
    runs-on: ubuntu-latest
    needs: changelog
    if: needs.changelog.outputs.changeLogOutcome == 'success'
    steps:
      - name: Checkout
        uses: actions/checkout@v6
        with:
          fetch-depth: 0

      - name: Create Package
        run: tar -czf forgit-${{ needs.changelog.outputs.version }}.tar.gz --exclude LICENSE --exclude README.md --exclude cliff.toml ./*

      - name: Release
        uses: softprops/action-gh-release@v3
        with:
          # The release action implicitly creates the tag if it does not exist.
          tag_name: ${{ needs.changelog.outputs.version }}
          body: ${{ needs.changelog.outputs.changelog }}
          files: forgit-${{ needs.changelog.outputs.version }}.tar.gz