Build & Test workflow (react/create-react-app)

The Build & Test workflow from react/create-react-app, explained and optimized by Latchkey.

CI health: C - fair

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Source: react/create-react-app.github/workflows/build-and-test.ymlLicense MITView source

What it does

This is the Build & Test workflow from the react/create-react-app repository, a real project running GitHub Actions. It is shown here with attribution under its MIT license.

Below, Latchkey shows a faster, safer version produced by its optimization engine.

The workflow

workflow (.yml)

name: 'Build & Test'

on:
  push:
    branches:
      - main
  pull_request:
    branches:
      - main

jobs:
  build:
    name: 'Build (${{ matrix.os }}, Node ${{ matrix.node }})'
    runs-on: ${{ matrix.os }}
    strategy:
      fail-fast: false
      matrix:
        os:
          - 'ubuntu-latest'
        node:
          - '16'
    steps:
      - uses: actions/checkout@v3
      - uses: actions/setup-node@v3
        with:
          node-version: ${{ matrix.node }}
          cache: 'npm'
      - name: Install dependencies
        run: npm ci --prefer-offline
      - name: Build
        run: npm run build

  integration:
    name: 'Integration Tests (${{ matrix.os }}, Node ${{ matrix.node }})'
    runs-on: ${{ matrix.os }}
    strategy:
      fail-fast: false
      matrix:
        os:
          - 'ubuntu-latest'
          - 'macos-latest'
          - 'windows-latest'
        node:
          - '16'
    steps:
      - uses: actions/checkout@v3
      - name: Setup node
        uses: actions/setup-node@v3
        with:
          node-version: ${{ matrix.node }}
          cache: 'npm'
      - name: Install dependencies
        run: npm ci --prefer-offline
      # The integration tests are run with yarn, so we need to install it.
      - name: Install yarn
        run: npm i -g yarn
      - name: Run integration tests
        run: npm run test:integration

  e2e-simple:
    name: E2E Simple
    uses: ./.github/workflows/e2e-base.yml
    with:
      testScript: 'tasks/e2e-simple.sh'

  e2e-installs:
    name: E2E Installs
    uses: ./.github/workflows/e2e-base.yml
    with:
      testScript: 'tasks/e2e-installs.sh'

  e2e-kitchensink:
    name: E2E Kitchensink
    uses: ./.github/workflows/e2e-base.yml
    with:
      testScript: 'tasks/e2e-kitchensink.sh'

The same workflow, on Latchkey

Removes redundant runs and caps runaway jobs. Added and changed lines are highlighted.

name: 'Build & Test'
 
on:
  push:
    branches:
      - main
  pull_request:
    branches:
      - main
 
concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true
 
jobs:
  build:
    timeout-minutes: 30
    name: 'Build (${{ matrix.os }}, Node ${{ matrix.node }})'
    runs-on: ${{ matrix.os }}
    strategy:
      fail-fast: false
      matrix:
        os:
          - 'ubuntu-latest'
        node:
          - '16'
    steps:
      - uses: actions/checkout@v3
      - uses: actions/setup-node@v3
        with:
          node-version: ${{ matrix.node }}
          cache: 'npm'
      - name: Install dependencies
        run: npm ci --prefer-offline
      - name: Build
        run: npm run build
 
  integration:
    timeout-minutes: 30
    name: 'Integration Tests (${{ matrix.os }}, Node ${{ matrix.node }})'
    runs-on: ${{ matrix.os }}
    strategy:
      fail-fast: false
      matrix:
        os:
          - 'ubuntu-latest'
          - 'macos-latest'
          - 'windows-latest'
        node:
          - '16'
    steps:
      - uses: actions/checkout@v3
      - name: Setup node
        uses: actions/setup-node@v3
        with:
          node-version: ${{ matrix.node }}
          cache: 'npm'
      - name: Install dependencies
        run: npm ci --prefer-offline
      # The integration tests are run with yarn, so we need to install it.
      - name: Install yarn
        run: npm i -g yarn
      - name: Run integration tests
        run: npm run test:integration
 
  e2e-simple:
    timeout-minutes: 30
    name: E2E Simple
    uses: ./.github/workflows/e2e-base.yml
    with:
      testScript: 'tasks/e2e-simple.sh'
 
  e2e-installs:
    timeout-minutes: 30
    name: E2E Installs
    uses: ./.github/workflows/e2e-base.yml
    with:
      testScript: 'tasks/e2e-installs.sh'
 
  e2e-kitchensink:
    timeout-minutes: 30
    name: E2E Kitchensink
    uses: ./.github/workflows/e2e-base.yml
    with:
      testScript: 'tasks/e2e-kitchensink.sh'

What changed

Cancel superseded runs when a branch or PR gets a newer push.
Add a job timeout so a hung step cannot burn hours of runner time.

What Latchkey heals here

This workflow has steps that commonly fail on transient issues (network, registries, flaky browsers). On Latchkey managed runners they are detected, retried, and self-healed instead of failing your build:

Dependency installs
End-to-end and browser tests

This workflow runs 5 jobs (7 with the matrix expanded) per trigger. On Latchkey the same minutes cost up to 58% less than GitHub-hosted, with zero queue time.

Actions used in this workflow

actions/checkout actions/setup-node