name: Promote Selected GPU Backend Status

on:
  status:

permissions:
  statuses: write

concurrency:
  group: gpu-ci-status-${{ github.event.sha }}-${{ vars.CI_GPU_BACKEND }}
  cancel-in-progress: false

jobs:
  promote:
    if: >-
      (vars.CI_GPU_BACKEND == 'modal' || vars.CI_GPU_BACKEND == 'vllm')
      && (github.event.context == format('gpu-ci/{0}/fastcheck-passed', vars.CI_GPU_BACKEND)
          || github.event.context == format('gpu-ci/{0}/full-suite-passed', vars.CI_GPU_BACKEND))
    runs-on: ubuntu-latest
    env:
      SELECTED_BACKEND: ${{ vars.CI_GPU_BACKEND }}
    steps:
      - name: Mirror the selected backend's latest suite results
        uses: actions/github-script@60a0d83039c74a4aee543508d2ffcb1c3799cdea # v7.0.1
        with:
          script: |
            const backend = process.env.SELECTED_BACKEND;
            if (!['modal', 'vllm'].includes(backend)) {
              throw new Error('Unsupported selected GPU backend');
            }
            const sha = context.payload.sha;
            // Read current state after entering the serialized workflow. A
            // delayed event must not overwrite a newer failure with success.
            const statuses = await github.paginate(github.rest.repos.listCommitStatusesForRef, {
              owner: context.repo.owner,
              repo: context.repo.repo,
              ref: sha,
              per_page: 100,
            });
            for (const suffix of ['fastcheck-passed', 'full-suite-passed']) {
              const sourceContext = `gpu-ci/${backend}/${suffix}`;
              const matches = statuses.filter(status => status.context === sourceContext);
              matches.sort((a, b) =>
                Date.parse(b.updated_at) - Date.parse(a.updated_at) || b.id - a.id
              );
              const latest = matches[0];
              const state = latest ? latest.state : 'pending';
              if (!['pending', 'success', 'failure', 'error'].includes(state)) {
                throw new Error(`Unsupported status state for ${sourceContext}`);
              }
              await github.rest.repos.createCommitStatus({
                owner: context.repo.owner,
                repo: context.repo.repo,
                sha,
                context: suffix,
                state,
                description: latest
                  ? `${backend} ${suffix}: ${state}`
                  : `Waiting for ${backend} ${suffix}`,
                ...(latest && latest.target_url ? {target_url: latest.target_url} : {}),
              });
            }