ci-workflow-pull-request.yml

# SPDX-FileCopyrightText: Copyright (c) 2023 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
# SPDX-License-Identifier: Apache-2.0
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

# This is the main workflow that runs on every PR and push to main
name: pull_request

defaults:
  run:
    shell: bash --noprofile --norc -euo pipefail {0}

on:
  push:
    branches:
      - "pull-request/[0-9]+"

concurrency:
  group: ${{ github.workflow }}-on-${{ github.event_name }}-from-${{ github.ref_name }}
  cancel-in-progress: true

jobs:

  build-workflow:
    name: Build workflow from matrix
    runs-on: ubuntu-latest
    permissions:
      contents: read
    outputs:
      workflow: ${{ steps.build-workflow.outputs.workflow }}
      workflow_keys: ${{ steps.build-workflow.outputs.workflow_keys }}
    steps:
      - name: Checkout repo
        uses: actions/checkout@v3

      - name: Build workflow
        id: build-workflow
        uses: NVIDIA/cccl/.github/actions/workflow-build@b3ef1e6a87e0eee7c382f5e6e474e9cfa1c44c36
        with:
          workflows: 'pull_request'

  run-workflow:
    name: ${{ matrix.name }}
    needs: build-workflow
    permissions:
      id-token: write
      contents: read
    strategy:
      fail-fast: false
      matrix:
        name: ${{ fromJSON(needs.build-workflow.outputs.workflow_keys) }}
    uses: NVIDIA/cccl/.github/workflows/workflow-dispatch.yml@b3ef1e6a87e0eee7c382f5e6e474e9cfa1c44c36
    with:
      name: ${{ matrix.name }}
      jobs: ${{ toJSON(fromJSON(needs.build-workflow.outputs.workflow)[matrix.name]) }}

  # This job acts as a sentry and will fail if any leaf job in the workflow tree fails, as
  # run-workflow always succeeds. Use this job when checking for successful matrix workflow job completion.
  verify-workflow:
    name: Verify and summarize workflow results
    if: ${{ always() && !cancelled() }}
    needs:
      - build-workflow
      - run-workflow
    permissions:
      contents: read
      pull-requests: write # Posts a comment back to the PR.
    runs-on: ubuntu-latest
    steps:
      - name: Checkout repo
        uses: actions/checkout@v3

      - name: Get Base Branch from PR
        id: get-pr-info
        uses: nv-gha-runners/get-pr-info@main

      - name: Check workflow success
        id: check-workflow
        uses: NVIDIA/cccl/.github/actions/workflow-results@b3ef1e6a87e0eee7c382f5e6e474e9cfa1c44c36
        with:
          github_token: ${{ secrets.GITHUB_TOKEN }}
          pr_number: ${{ fromJSON(steps.get-pr-info.outputs.pr-info).number }}

  # Check all other job statuses. This job gates branch protection checks.
  ci:
    name: CI
    # !! Important: This job is used for branch protection checks.
    # !! Need to use always() instead of !cancelled() because skipped jobs count as success
    # !! for Github branch protection checks. Yes, really: by default, branch protections
    # !! can be bypassed by cancelling CI. See NVIDIA/cccl#605.
    if: ${{ always() }}
    needs:
      - verify-workflow
    runs-on: ubuntu-latest
    steps:
      - name: Check results
        run: |
          status="success"

          check_result() {
            name=$1
            expected=$2
            result=$3

            echo "Checking if $name job result ('$result') is '$expected'..."
            if [[ "$result" != "$expected" ]]; then
              echo "$name job failed"

              status="failed"
            fi
          }

          check_result "verify-workflow"      "success" "${{needs.verify-workflow.result}}"

          if [[ "$status" != "success" ]]; then
            exit 1
          fi