# Copyright (c) HashiCorp, Inc.
# SPDX-License-Identifier: MPL-2.0

# This action creates downstream PRs for PRs with backport labels defined.
# See docs here: https://github.com/hashicorp/backport-assistant

name: Backport Assistant Runner

on:
  pull_request_target:
    types:
      - closed
      - labeled
    branches:
      - main
      - 'release/*.*.x'

jobs:
  backport:
    if: github.event.pull_request.merged
    runs-on: ubuntu-latest
    container: hashicorpdev/backport-assistant:0.3.3
    steps:
      - name: Run Backport Assistant for release branches
        run: |
          backport-assistant backport -merge-method=squash -gh-automerge
        env:
          BACKPORT_LABEL_REGEXP: "backport/(?P<target>\\d+\\.\\d+)"
          BACKPORT_TARGET_TEMPLATE: "release/{{.target}}.x"
          GITHUB_TOKEN: ${{ secrets.ELEVATED_GITHUB_TOKEN }}
  handle-failure:
    needs:
      - backport
    if: always() && needs.backport.result == 'failure'
    runs-on: ubuntu-latest
    steps:
      - name: Comment on PR
        run: |
          github_message="Backport failed @${{ github.event.sender.login }}. Run: ${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}"
          curl -s -H "Authorization: token ${{ secrets.PR_COMMENT_TOKEN }}" \
            -X POST \
            -d "{ \"body\": \"${github_message}\"}" \
            "https://api.github.com/repos/${GITHUB_REPOSITORY}/pull/${{ github.event.pull_request.number }}/comments"