cancel-closed-queue-runs.yml

name: Cancel Closed Merge Queue Runs

on:
  pull_request:
    types: [closed]
    branches: [main]

permissions: {}

jobs:
  cancel-runs:
    if: >-
      github.event.pull_request.user.login == 'mergify[bot]' &&
      github.event.pull_request.head.repo.full_name == github.repository &&
      startsWith(github.event.pull_request.head.ref, 'mergify/merge-queue/')
    runs-on: ubuntu-latest
    timeout-minutes: 5
    permissions:
      actions: write
    steps:
      - name: Cancel active runs for the closed queue candidate
        uses: actions/github-script@3a2844b7e9c422d3c10d287c895573f7108da1b3 # v9.0.0
        with:
          script: |
            const branch = context.payload.pull_request.head.ref;
            const activeStatuses = new Set([
              'in_progress',
              'pending',
              'queued',
              'requested',
              'waiting',
            ]);

            const runs = await github.paginate(
              github.rest.actions.listWorkflowRunsForRepo,
              {
                owner: context.repo.owner,
                repo: context.repo.repo,
                branch,
                event: 'pull_request',
                per_page: 100,
              },
            );

            const activeRuns = runs.filter(
              (run) => run.id !== context.runId && activeStatuses.has(run.status),
            );

            for (const run of activeRuns) {
              core.info(`Cancelling ${run.name} run ${run.id} (${run.status})`);

              try {
                await github.rest.actions.cancelWorkflowRun({
                  owner: context.repo.owner,
                  repo: context.repo.repo,
                  run_id: run.id,
                });
              } catch (error) {
                if (error.status === 409) {
                  core.info(`Run ${run.id} completed before it could be cancelled`);
                  continue;
                }

                throw error;
              }
            }

            core.info(`Requested cancellation for ${activeRuns.length} active run(s)`);