grafana/.github/workflows/backport-trigger.yml

# We need secrets to backport, but they're not available for actions ran by forks.
# So this workflow is used as a 'trigger', which the backport-workflow.yml will with
# via workflow_run

name: Backport (trigger)
on:
  pull_request:
    types:
      - closed
      - labeled

permissions: {}

jobs:
  trigger:
    # Only run this job if the PR has been merged and has a label containing "backport v"
    if: |
      github.repository == 'grafana/grafana' &&
      github.event.pull_request.merged == true &&
      contains(join(github.event.pull_request.labels.*.name, ','), 'backport v')      
    runs-on: ubuntu-latest
    steps:
      # TODO: save this as job summary instead?
      - name: Trigger
        run: |
          echo "Triggering workflow"
          echo "See https://github.com/${{ github.repository }}/actions/workflows/workflow_run.yml for progress"          

      # Create a JSON artifact with details of this PR to pass to the backport workflow.
      # The { action: 'labelled', label: 'backport-1.23.x' } can only be determined from this event payload,
      # and is needed to do a backport after a PR has been merged
      #
      # Important that we don't run *anything* from the PR which could modify the backport_data.json file
      - name: Create action data
        run: |
          jq '{
            action: .action,
            label: .label.name,
            pr_number: .number,
          }' "$GITHUB_EVENT_PATH" > /tmp/pr_info.json          

      - name: Upload artifact
        uses: actions/upload-artifact@v4
        with:
          name: pr_info
          path: /tmp/pr_info.json
          retention-days: 1