Node CI workflow (blueimp/JavaScript-Load-Image)

The Node CI workflow from blueimp/JavaScript-Load-Image, explained and optimized by Latchkey.

CI health: D - needs work

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

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Source: blueimp/JavaScript-Load-Image.github/workflows/test.ymlLicense MITView source

What it does

This is the Node CI workflow from the blueimp/JavaScript-Load-Image 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: Node CI

on: [push, pull_request]

jobs:
  lint:
    runs-on: ubuntu-latest
    strategy:
      matrix:
        node-version: [14, 16]
    steps:
      - uses: actions/checkout@v2
      - uses: actions/setup-node@v2
        with:
          node-version: ${{ matrix.node-version }}
      - run: npm install
      - run: npm run lint

  unit:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v2
      - name: mocha
        run: docker-compose run --rm mocha
      - name: docker-compose logs
        if: always()
        run: docker-compose logs nginx
      - name: docker-compose down
        if: always()
        run: docker-compose down -v

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: Node CI
 
on: [push, pull_request]
 
concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true
 
jobs:
  lint:
    timeout-minutes: 30
    runs-on: latchkey-small
    strategy:
      matrix:
        node-version: [14, 16]
    steps:
      - uses: actions/checkout@v2
      - uses: actions/setup-node@v2
        with:
          cache: 'npm'
          node-version: ${{ matrix.node-version }}
      - run: npm install
      - run: npm run lint
 
  unit:
    timeout-minutes: 30
    runs-on: latchkey-small
    steps:
      - uses: actions/checkout@v2
      - name: mocha
        run: docker-compose run --rm mocha
      - name: docker-compose logs
        if: always()
        run: docker-compose logs nginx
      - name: docker-compose down
        if: always()
        run: docker-compose down -v

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.

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 2 jobs (3 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