name: Backport Pull Request

on:
  pull_request_target:
    types: [closed, labeled]

permissions:
  contents: write
  pull-requests: write

jobs:
  backport:
    if: github.event.pull_request.merged
    runs-on: ubuntu-latest
    steps:
      - name: Checkout repository
        uses: actions/checkout@v4

      - name: Create app token
        uses: actions/create-github-app-token@v2
        id: app-token
        with:
          app-id: ${{ vars.BACKPORT_APP }}
          private-key: ${{ secrets.BACKPORT_KEY }}

      - name: Create backport PR
        uses: korthout/backport-action@v3
        with:
          pull_title: "${pull_title}"
          label_pattern: "^ci:backport ([^ ]+)$"
          github_token: ${{ steps.app-token.outputs.token }}