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

# This workflow checks that there is either a 'pr/no-backport' label applied to a PR
# or there is a backport/* label indicating a backport has been set

name: Backport Checker

on:
  pull_request:
    types: [opened, synchronize, labeled]
    # Runs on PRs to main and all release branches
    branches:
      - main
      - release/*

jobs:
  # checks that a backport label is present for a PR
  backport-check:
    # If there's a `pr/no-backport` label we ignore this check. Also, we ignore PRs created by the bot assigned to `backport-assistant`
    if: "! ( contains(github.event.pull_request.labels.*.name, 'pr/no-backport') || github.event.pull_request.user.login == 'hc-github-team-consul-core' )"
    runs-on: ubuntu-latest

    steps:
      - name: Check for Backport Label
        run: |
          labels="${{join(github.event.pull_request.labels.*.name, ', ') }}"
          if [[ "$labels" =~ .*"backport/".* ]]; then
            echo "Found backport label!"
            exit 0
          fi
          # Fail status check when no backport label was found on the PR
          echo "Did not find a backport label matching the pattern 'backport/*' and the 'pr/no-backport' label was not applied. Reference - https://github.com/hashicorp/consul/pull/16567"
          exit 1