serverless-patch.yml

---
name: Apply PR changes to serverless
on:
  pull_request_target:
    types:
      - closed
      - labeled

jobs:
  apply-patch:
    name: Apply patch
    runs-on: ubuntu-latest
    # Only react to merged PRs for security reasons.
    # See https://docs.github.com/en/actions/using-workflows/events-that-trigger-workflows#pull_request_target.
    if: >
      github.event.pull_request.merged
      && (
        (
          github.event.action == 'closed'
          && contains(github.event.pull_request.labels.*.name, 'apply-to-serverless')
        )
        ||
        (
          github.event.action == 'labeled'
          && github.event.label.name == 'apply-to-serverless'
        )
      )
    steps:
      - uses: actions/checkout@v4
        with:
          repository: elastic/elasticsearch-js
          ref: '${{ github.event.pull_request.merge_commit_sha }}'
          path: elasticsearch-js
      - uses: actions/checkout@v4
        with:
          repository: elastic/elasticsearch-serverless-js
          ref: main
          path: elasticsearch-serverless-js
      - name: Generate patch file
        run: |
          cd $GITHUB_WORKSPACE/elasticsearch-js
          git format-patch -1 --stdout ${{ github.event.pull_request.merge_commit_sha }} > /tmp/patch.diff
      - name: Apply patch file
        run: |
          cd $GITHUB_WORKSPACE/elasticsearch-serverless-js
          git checkout -b apply-patch-${{ github.event.pull_request.id }}
          git apply -C1 --recount --reject /tmp/patch.diff || exit 0
          comment='Patch applied from elastic/elasticsearch-js#${{ github.event.pull_request.id }}'
          for f in $(find . -name '*.rej'); do
            comment="$comment\n\n## Rejected patch \`$f`\:\n\`\`\`\n$(cat $f)\n\`\`\`"
          done
          gh pr create -t "Apply PR changes from elastic/elasticsearch-js#${{ github.event.pull_request.id }}" --body "$comment"