CI workflow (guzzle/guzzle)

The CI workflow from guzzle/guzzle, explained and optimized by Latchkey.

CI health: F - at risk

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Source: guzzle/guzzle.github/workflows/ci.ymlLicense MITView source

What it does

This is the CI workflow from the guzzle/guzzle 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: CI

on:
  push:
    branches:
  pull_request:

permissions:
  contents: read

env:
  COMPOSER_ROOT_VERSION: 7.14.x-dev

jobs:
  build-lowest-version:
    name: Build lowest version
    runs-on: ubuntu-24.04

    steps:
      - name: Set up PHP
        uses: shivammathur/setup-php@v2
        with:
          php-version: '7.2'
          ini-values: error_reporting=E_ALL
          coverage: none
          extensions: mbstring, intl

      - name: Set up Node
        uses: actions/setup-node@v6
        with:
          node-version: '22.x'

      - name: Setup Problem Matchers for PHPUnit
        run: echo "::add-matcher::${{ runner.tool_cache }}/phpunit.json"

      - name: Checkout code
        uses: actions/checkout@v6

      - name: Download dependencies
        run: composer update --no-interaction --no-progress --prefer-stable --prefer-lowest

      - name: Start test servers
        shell: bash
        run: ./vendor/bin/http_test_server &

      - name: Run tests
        run: ./vendor/bin/phpunit

  build:
    name: Build
    runs-on: ubuntu-24.04
    strategy:
      fail-fast: false
      max-parallel: 10
      matrix:
        php: ['7.2', '7.3', '7.4', '8.0', '8.1', '8.2', '8.3', '8.4', '8.5']

    steps:
      - name: Set up PHP
        uses: shivammathur/setup-php@v2
        with:
          php-version: ${{ matrix.php }}
          ini-values: error_reporting=E_ALL
          coverage: none
          extensions: mbstring, intl

      - name: Set up Node
        uses: actions/setup-node@v6
        with:
          node-version: '22.x'

      - name: Setup Problem Matchers for PHPUnit
        run: echo "::add-matcher::${{ runner.tool_cache }}/phpunit.json"

      - name: Checkout code
        uses: actions/checkout@v6

      - name: Download dependencies
        run: composer update --no-interaction --no-progress

      - name: Start test servers
        shell: bash
        run: ./vendor/bin/http_test_server &

      - name: Run tests
        run: ./vendor/bin/phpunit

  build-windows:
    name: Build on Windows
    runs-on: windows-2025
    strategy:
      fail-fast: false
      max-parallel: 10
      matrix:
        php: ['7.2', '7.3', '7.4', '8.0', '8.1', '8.2', '8.3', '8.4', '8.5']

    steps:
      - name: Set up PHP
        uses: shivammathur/setup-php@v2
        with:
          php-version: ${{ matrix.php }}
          ini-values: error_reporting=E_ALL
          coverage: none
          extensions: mbstring, intl

      - name: Set up Node
        uses: actions/setup-node@v6
        with:
          node-version: '22.x'

      - name: Setup Problem Matchers for PHPUnit
        run: echo "::add-matcher::${{ runner.tool_cache }}/phpunit.json"

      - name: Checkout code
        uses: actions/checkout@v6

      - name: Download dependencies
        run: composer update --no-interaction --no-progress

      - name: Start test servers
        shell: bash
        run: ./vendor/bin/http_test_server &

      - name: Run tests
        run: vendor/bin/phpunit.bat

The same workflow, on Latchkey

Estimated ~20% faster on cache hits, plus fewer wasted runs and a safer supply chain. Added and changed lines are highlighted.

name: CI
 
on:
  push:
    branches:
  pull_request:
 
permissions:
  contents: read
 
env:
  COMPOSER_ROOT_VERSION: 7.14.x-dev
 
concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true
 
jobs:
  build-lowest-version:
    timeout-minutes: 30
    name: Build lowest version
    runs-on: latchkey-small
 
    steps:
      - name: Set up PHP
        uses: shivammathur/setup-php@v2
        with:
          php-version: '7.2'
          ini-values: error_reporting=E_ALL
          coverage: none
          extensions: mbstring, intl
 
      - name: Set up Node
        uses: actions/setup-node@v6
        with:
          cache: 'npm'
          node-version: '22.x'
 
      - name: Setup Problem Matchers for PHPUnit
        run: echo "::add-matcher::${{ runner.tool_cache }}/phpunit.json"
 
      - name: Checkout code
        uses: actions/checkout@v6
 
      - name: Download dependencies
        run: composer update --no-interaction --no-progress --prefer-stable --prefer-lowest
 
      - name: Start test servers
        shell: bash
        run: ./vendor/bin/http_test_server &
 
      - name: Run tests
        run: ./vendor/bin/phpunit
 
  build:
    timeout-minutes: 30
    name: Build
    runs-on: latchkey-small
    strategy:
      fail-fast: false
      max-parallel: 10
      matrix:
        php: ['7.2', '7.3', '7.4', '8.0', '8.1', '8.2', '8.3', '8.4', '8.5']
 
    steps:
      - name: Set up PHP
        uses: shivammathur/setup-php@v2
        with:
          php-version: ${{ matrix.php }}
          ini-values: error_reporting=E_ALL
          coverage: none
          extensions: mbstring, intl
 
      - name: Set up Node
        uses: actions/setup-node@v6
        with:
          cache: 'npm'
          node-version: '22.x'
 
      - name: Setup Problem Matchers for PHPUnit
        run: echo "::add-matcher::${{ runner.tool_cache }}/phpunit.json"
 
      - name: Checkout code
        uses: actions/checkout@v6
 
      - name: Download dependencies
        run: composer update --no-interaction --no-progress
 
      - name: Start test servers
        shell: bash
        run: ./vendor/bin/http_test_server &
 
      - name: Run tests
        run: ./vendor/bin/phpunit
 
  build-windows:
    timeout-minutes: 30
    name: Build on Windows
    runs-on: windows-2025
    strategy:
      fail-fast: false
      max-parallel: 10
      matrix:
        php: ['7.2', '7.3', '7.4', '8.0', '8.1', '8.2', '8.3', '8.4', '8.5']
 
    steps:
      - name: Set up PHP
        uses: shivammathur/setup-php@v2
        with:
          php-version: ${{ matrix.php }}
          ini-values: error_reporting=E_ALL
          coverage: none
          extensions: mbstring, intl
 
      - name: Set up Node
        uses: actions/setup-node@v6
        with:
          cache: 'npm'
          node-version: '22.x'
 
      - name: Setup Problem Matchers for PHPUnit
        run: echo "::add-matcher::${{ runner.tool_cache }}/phpunit.json"
 
      - name: Checkout code
        uses: actions/checkout@v6
 
      - name: Download dependencies
        run: composer update --no-interaction --no-progress
 
      - name: Start test servers
        shell: bash
        run: ./vendor/bin/http_test_server &
 
      - name: Run tests
        run: vendor/bin/phpunit.bat

What changed

Run on Latchkey managed runners with one line (runs-on), which apply the fixes below automatically and self-heal transient failures. This example uses latchkey-small; pick the runner size that fits the job.
Cancel superseded runs when a branch or PR gets a newer push.
Cache dependency installs on the setup step so they are served from cache.
Add a job timeout so a hung step cannot burn hours of runner time.

1 third-party action is referenced by a movable tag. Pin it to the commit SHA (Latchkey resolves and applies this automatically) so a repointed tag cannot change what runs.

This workflow runs 3 jobs (19 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/setup-node actions/checkout