alert-on-failed-automerge.yml

name: Check Suite Failure Notification

on:
    # whenever a workflow suite completes trigger this
    check_suite:
        types:
            - completed

jobs:
    notify_on_failure:
        if: ${{ github.event.check_suite.conclusion == 'failure' }}
        runs-on: ubuntu-24.04

        steps:
            - name: Checkout code
              uses: actions/checkout@v3

            - name: Check if the PR has "automerge" label
              id: automerge_check
              run: |
                  pr_number=$(jq -r '.check_suite.pull_requests[0].number' <<< "${{ toJson(github.event) }}")
                  if [ -z "$pr_number" ]; then
                    echo "No PR associated with this check suite."
                    echo "::set-output name=result::false"
                    exit 0
                  fi

                  labels=$(curl -s -H "Authorization: token ${{ secrets.GITHUB_TOKEN }}" \
                  https://api.github.com/repos/${{ github.repository }}/issues/$pr_number/labels)

                  echo "Labels: $labels"
                  if echo "$labels" | grep -q "automerge"; then
                    echo "::set-output name=result::true"
                  else
                    echo "::set-output name=result::false"
                  fi

            - name: Send Slack notification if the PR has "automerge" label
              if: ${{ steps.automerge_check.outputs.result == 'true' }}
              uses: rtCamp/action-slack-notify@v2
              env:
                  SLACK_CHANNEL: subscriptions-slack-testing
                  SLACK_COLOR: ${{ job.status }} # or a specific color like 'good' or '#ff00ff'
                  SLACK_ICON: https://github.com/posthog.png?size=48
                  SLACK_USERNAME: Max Hedgehog
                  SLACK_WEBHOOK: ${{ secrets.SLACK_WEBHOOK_URL }}
              with:
                  message: "PR #${{ github.event.check_suite.pull_requests[0].number }} failed a check suite and is labeled 'automerge'. Please investigate!"
                  status: failure