Node.js CI workflow (JedWatson/classnames)
The Node.js CI workflow from JedWatson/classnames, explained and optimized by Latchkey.
CI health: C - fair
Point runs-on at Latchkey and get run de-duplication, job timeouts, self-healing for flaky steps, and up to 58% lower cost, applied automatically.
What it does
This is the Node.js CI workflow from the JedWatson/classnames 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
name: Node.js CI
on:
push:
branches:
- main
pull_request:
jobs:
test:
name: Run tests on supported Node.js versions
runs-on: ubuntu-latest
strategy:
fail-fast: false
matrix:
# See supported Node.js versions at https://nodejs.org/en/about/previous-releases
node-version: [18, 20, 21]
steps:
- name: Check out repository
uses: actions/checkout@v7
- name: Set up Node.js
uses: actions/setup-node@v4
with:
node-version: ${{ matrix.node-version }}
cache: npm
- name: Install dependencies
run: npm ci
- name: Run tests
run: npm test
check-types:
name: Check type definitions
runs-on: ubuntu-latest
steps:
- name: Check out repository
uses: actions/checkout@v7
- name: Set up Node.js
uses: actions/setup-node@v4
with:
node-version: 20
cache: npm
- name: Install dependencies
run: npm ci
- name: Check type definitions
run: npm run check-types
benchmarks:
name: Run benchmarks
runs-on: ubuntu-latest
steps:
- name: Check out repository
uses: actions/checkout@v7
- name: Set up Node.js
uses: actions/setup-node@v4
with:
node-version: 20
cache: npm
- name: Install dependencies
run: npm ci
- name: Run benchmarks
run: npm run bench
The same workflow, on Latchkey
Removes redundant runs and caps runaway jobs. Added and changed lines are highlighted.
name: Node.js CI on: push: branches: - main pull_request: concurrency: group: ${{ github.workflow }}-${{ github.ref }} cancel-in-progress: true jobs: test: timeout-minutes: 30 name: Run tests on supported Node.js versions runs-on: latchkey-small strategy: fail-fast: false matrix: # See supported Node.js versions at https://nodejs.org/en/about/previous-releases node-version: [18, 20, 21] steps: - name: Check out repository uses: actions/checkout@v7 - name: Set up Node.js uses: actions/setup-node@v4 with: node-version: ${{ matrix.node-version }} cache: npm - name: Install dependencies run: npm ci - name: Run tests run: npm test check-types: timeout-minutes: 30 name: Check type definitions runs-on: latchkey-small steps: - name: Check out repository uses: actions/checkout@v7 - name: Set up Node.js uses: actions/setup-node@v4 with: node-version: 20 cache: npm - name: Install dependencies run: npm ci - name: Check type definitions run: npm run check-types benchmarks: timeout-minutes: 30 name: Run benchmarks runs-on: latchkey-small steps: - name: Check out repository uses: actions/checkout@v7 - name: Set up Node.js uses: actions/setup-node@v4 with: node-version: 20 cache: npm - name: Install dependencies run: npm ci - name: Run benchmarks run: npm run bench
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 useslatchkey-small; pick the runner size that fits the job. - 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
This workflow runs 3 jobs (5 with the matrix expanded) per trigger. On Latchkey the same minutes cost up to 58% less than GitHub-hosted, with zero queue time.