release.yaml

name: Release

on:
  push:
    tags:
      - 'v[0-9]+.[0-9]+.[0-9]+*'

jobs:
  release:
    runs-on: ubuntu-latest
    if: startsWith(github.ref_name, 'v') && !contains(github.ref_name, '-')
    permissions:
      contents: write
    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Find previous stable tag
        id: prev_tag
        run: |
          PREV=$(git tag --sort=-version:refname \
            | grep -E '^v[0-9]+\.[0-9]+\.[0-9]+$' \
            | grep -v "^${{ github.ref_name }}$" \
            | head -1)
          echo "tag=${PREV}" >> $GITHUB_OUTPUT

      - name: Generate release notes
        run: |
          PREV="${{ steps.prev_tag.outputs.tag }}"
          if [ -z "$PREV" ]; then
            touch release_notes.md
          else
            git log "${PREV}..${{ github.ref_name }}" \
              --pretty=format:"- %s" \
              --no-merges > release_notes.md
          fi

      - name: Create release
        run: |
          gh release create "${{ github.ref_name }}" \
            --title "${{ github.ref_name }}" \
            --notes-file release_notes.md
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}