BACKPORT_PR.yml

name: Backport merged pull request
on:
  pull_request_target:
    types: [ closed ]
  issue_comment:
    types: [ created ]

permissions:
  contents: write # so it can comment
  pull-requests: write # so it can create pull requests

jobs:
  backport:
    name: Backport pull request
    runs-on: ubuntu-latest

    # Only run when pull request is merged
    # or when a comment containing `/backport` is created by someone other than the
    # https://github.com/backport-action bot user (user id: 97796249)
    if: >
      (
        github.event_name == 'pull_request_target' &&
        github.event.pull_request.merged
      ) || (
        github.event_name == 'issue_comment' &&
        github.event.issue.pull_request &&
        github.event.comment.user.id != 97796249 &&
        startsWith(github.event.comment.body, '/backport')
      )
    steps:
      - uses: actions/checkout@v4
        with:
          # PR created by GitHub Action bot will not trigger CI checks
          token: ${{ secrets.PROTECTED_BRANCH_PAT }}
      - name: Create backport pull requests
        uses: korthout/backport-action@v3
        with:
          github_token: ${{ secrets.PROTECTED_BRANCH_PAT }}
          experimental: >
            {
              "detect_merge_method": true
            }