release.yml

name: release

on:
  push:
    tags: [ 'v*' ]

permissions:
  contents: write
  pull-requests: read

jobs:
  release:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v5
        with:
          fetch-depth: 0

      - name: Check for Backwards Compatibility Breaks
        id: bc_check
        run: |
          docker run --rm -v "${GITHUB_WORKSPACE}":/app -w /app nyholm/roave-bc-check-ga || 
          echo "bc_breaks=true" >> $GITHUB_OUTPUT

      - name: Validate version against Backwards Compatibility Breaks
        run: |
          TAG=${GITHUB_REF#refs/tags/v}

          if ! [[ $TAG =~ ^([0-9]+)\.([0-9]+)\.([0-9]+) ]]; then
            echo "Invalid semver format"
            exit 1
          fi

          if [[ "${{ steps.bc_check.outputs.bc_breaks }}" == "true" ]]; then
            PREV_TAG=$(git describe --tags --abbrev=0 HEAD^ 2>/dev/null || echo 'v0.0.0')
            PREV_MAJOR=${PREV_TAG#v} | cut -d'.' -f1
          
            if [ "${BASH_REMATCH[1]}" -le "$PREV_MAJOR" ]; then
              echo "Breaking changes require major version bump"
              exit 1
            fi
          fi

      - name: Generate Release Notes
        env:
          GH_TOKEN: ${{ github.token }}
          REPO: ${{ github.repository }}
        run: |
          PREV_TAG=$(git describe --tags --abbrev=0 HEAD^ 2>/dev/null || echo '')
          SINCE_DATE=$(git log -1 --format=%aI $PREV_TAG)
          
          gh pr list --base main --state merged --json title,number,author \
            --search "merged:>=$SINCE_DATE" | \
          jq -r '.[] | "- \(.title) by @\(.author.login) in #\(.number)"' > RELEASE_NOTES.md

          git log --pretty=format:"- %s by %an in %H" $PREV_TAG..HEAD --no-merges >> RELEASE_NOTES.md
      - uses: softprops/action-gh-release@v2
        if: ${{ !steps.bc_check.outputs.bc_breaks }}
        with:
          body_path: RELEASE_NOTES.md