CI workflow (stylus/stylus)

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

CI health: F - at risk

Point runs-on at Latchkey and get caching, run de-duplication, job timeouts, SHA-pinned actions, self-healing for flaky steps, and up to 58% lower cost, applied automatically.

Grade your own workflow free or run it on Latchkey →

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

What it does

This is the CI workflow from the stylus/stylus 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)

# Github actions workflow name
name: CI

# Triggers the workflow on push or pull request events
on:
  push:
    branches: [main, dev, master]
    tags: ['**']
  pull_request:

jobs:
  node_tests:
    name: 'Test stylus on ${{matrix.os}} with node${{matrix.node}}'
    strategy:
      matrix:
        os: [ubuntu-latest, macos-latest, windows-latest]
        node: [22]
    runs-on: ${{ matrix.os }}
    steps:
     # Pull repo to test machine
     - uses: actions/checkout@v4
     # Configures the node version used on GitHub-hosted runners
     - uses: actions/setup-node@v4
       with:
         # The Node.js version to configure
         node-version: ${{matrix.node}}
     - name: Install npm dependencies
       run: npm install
     - name: Print node & npm version
       # Output useful info for debugging.
       run: node --version && npm --version 
     - name: Run Test
       run: npm run test

  compat_node_tests:
    name: 'Compat test stylus on ${{matrix.os}} with node${{matrix.node}}'
    strategy:
      matrix:
        os: [ubuntu-latest]
        node: [16, 18, 20, 23]
    runs-on: ${{ matrix.os }}
    steps:
     - uses: actions/checkout@v4
     - uses: actions/setup-node@v4
       with:
         node-version: ${{ matrix.node }}
     - name: Install npm dependencies
       run: npm install
     - name: Print put node & npm version
       run: node --version && npm --version 
     - name: Run Test
       run: npm run test

  benchmark:
    name: 'Run stylus benchmark with node20'
    runs-on: ubuntu-latest
    steps:
     - uses: actions/checkout@v4
     - uses: actions/setup-node@v4
       with:
         node-version: '22'
     - name: Install npm dependencies
       run: npm install
     - name: Print put node & npm version
       run: node --version && npm --version 
     - name: Run Benchmark
       run: node ./bm.js
  
  yarn-regression:
    name: 'yarn exec stylus regression test'
    runs-on: macos-latest
    steps:
     - uses: actions/checkout@v4
     - uses: actions/setup-node@v4
       with:
         node-version: '22'
     - name: Print put node & npm version
       run: node --version && npm --version
     - name: Install yarn global
       run: npm install -g yarn
     - name: open a new folder
       run: cd ./test/yarn
     - name: Run Yarn
       run: yarn install && yarn add stylus@latest && yarn run stylus --version
  
  coverage:
    name: 'Run nyc for code coverage'
    runs-on: ubuntu-latest
    steps:
     - uses: actions/checkout@v4
     - uses: actions/setup-node@v4
       with:
         node-version: '22'
     - name: Print put node & npm version
       run: node --version && npm --version
     - name: Install npm dependencies
       run: npm install
     - name: Run nyc
       run: npx nyc@latest npm run test
    
  deno_tests:
    name: 'Test stylus on ${{matrix.os}} with latest stable deno'
    strategy:
      matrix:
        os: [ubuntu-latest, macos-latest, windows-latest]
    runs-on: ${{ matrix.os }}
    steps:
     # Pull repo to test machine
     - uses: actions/checkout@v4
     # Configures the deno version used on GitHub-hosted runners
     - uses: denoland/setup-deno@v2
       with:
         # Run with latest stable Deno
         deno-version: v1.x
     - name: Print deno version
       # Output useful info for debugging.
       run: deno --version
     - name: Run Test
       run: deno run -A deno/test.ts

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.

# Github actions workflow name
name: CI
 
# Triggers the workflow on push or pull request events
on:
  push:
    branches: [main, dev, master]
    tags: ['**']
  pull_request:
 
concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true
 
jobs:
  node_tests:
    timeout-minutes: 30
    name: 'Test stylus on ${{matrix.os}} with node${{matrix.node}}'
    strategy:
      matrix:
        os: [ubuntu-latest, macos-latest, windows-latest]
        node: [22]
    runs-on: ${{ matrix.os }}
    steps:
     # Pull repo to test machine
     - uses: actions/checkout@v4
     # Configures the node version used on GitHub-hosted runners
     - uses: actions/setup-node@v4
       with:
         cache: 'npm'
         # The Node.js version to configure
         node-version: ${{matrix.node}}
     - name: Install npm dependencies
       run: npm install
     - name: Print node & npm version
       # Output useful info for debugging.
       run: node --version && npm --version 
     - name: Run Test
       run: npm run test
 
  compat_node_tests:
    timeout-minutes: 30
    name: 'Compat test stylus on ${{matrix.os}} with node${{matrix.node}}'
    strategy:
      matrix:
        os: [ubuntu-latest]
        node: [16, 18, 20, 23]
    runs-on: ${{ matrix.os }}
    steps:
     - uses: actions/checkout@v4
     - uses: actions/setup-node@v4
       with:
         cache: 'npm'
         node-version: ${{ matrix.node }}
     - name: Install npm dependencies
       run: npm install
     - name: Print put node & npm version
       run: node --version && npm --version 
     - name: Run Test
       run: npm run test
 
  benchmark:
    timeout-minutes: 30
    name: 'Run stylus benchmark with node20'
    runs-on: latchkey-small
    steps:
     - uses: actions/checkout@v4
     - uses: actions/setup-node@v4
       with:
         cache: 'npm'
         node-version: '22'
     - name: Install npm dependencies
       run: npm install
     - name: Print put node & npm version
       run: node --version && npm --version 
     - name: Run Benchmark
       run: node ./bm.js
  
  yarn-regression:
    timeout-minutes: 30
    name: 'yarn exec stylus regression test'
    runs-on: macos-latest
    steps:
     - uses: actions/checkout@v4
     - uses: actions/setup-node@v4
       with:
         cache: 'npm'
         node-version: '22'
     - name: Print put node & npm version
       run: node --version && npm --version
     - name: Install yarn global
       run: npm install -g yarn
     - name: open a new folder
       run: cd ./test/yarn
     - name: Run Yarn
       run: yarn install && yarn add stylus@latest && yarn run stylus --version
  
  coverage:
    timeout-minutes: 30
    name: 'Run nyc for code coverage'
    runs-on: latchkey-small
    steps:
     - uses: actions/checkout@v4
     - uses: actions/setup-node@v4
       with:
         cache: 'npm'
         node-version: '22'
     - name: Print put node & npm version
       run: node --version && npm --version
     - name: Install npm dependencies
       run: npm install
     - name: Run nyc
       run: npx nyc@latest npm run test
    
  deno_tests:
    timeout-minutes: 30
    name: 'Test stylus on ${{matrix.os}} with latest stable deno'
    strategy:
      matrix:
        os: [ubuntu-latest, macos-latest, windows-latest]
    runs-on: ${{ matrix.os }}
    steps:
     # Pull repo to test machine
     - uses: actions/checkout@v4
     # Configures the deno version used on GitHub-hosted runners
     - uses: denoland/setup-deno@v2
       with:
         # Run with latest stable Deno
         deno-version: v1.x
     - name: Print deno version
       # Output useful info for debugging.
       run: deno --version
     - name: Run Test
       run: deno run -A deno/test.ts

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.

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

This workflow runs 6 jobs (13 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