CI test workflow (moleculerjs/moleculer)

The CI test workflow from moleculerjs/moleculer, explained and optimized by Latchkey.

CI health: F - at risk

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Source: moleculerjs/moleculer.github/workflows/ci.ymlLicense MITView source

What it does

This is the CI test workflow from the moleculerjs/moleculer 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 test

on:
  push:
    branches:
      - '**'
    paths-ignore:
      - 'benchmark/**'
      - 'dev/**'
      - 'examples/**'
      - '*.md'

  pull_request:
    branches:
      - master
    paths-ignore:
      - 'benchmark/**'
      - 'dev/**'
      - 'examples/**'
      - '*.md'

jobs:
  test:
    runs-on: ubuntu-22.04
    strategy:
      matrix:
        node-version: [22.x, 24.x]
      fail-fast: false

    steps:
    - uses: actions/checkout@v4

    - name: Use Node.js ${{ matrix.node-version }}
      uses: actions/setup-node@v4
      with:
        node-version: ${{ matrix.node-version }}

    - name: Cache node modules
      uses: actions/cache@v4
      env:
        cache-name: cache-node-modules
      with:
        # npm cache files are stored in `~/.npm` on Linux/macOS
        path: ~/.npm
        key: ${{ runner.os }}-build-${{ env.cache-name }}-${{ hashFiles('**/package-lock.json') }}
        restore-keys: |
          ${{ runner.os }}-build-${{ env.cache-name }}-
          ${{ runner.os }}-build-
          ${{ runner.os }}-

    - name: Disable proto
      run: export NODE_OPTIONS=--disable-proto=delete

    - name: Install dependencies
      run: npm ci

    - name: Execute unit tests
      run: npm run test

    - name: Execute Typescript tests
      run: npm run test:ts

    - name: Execute ESM tests
      run: npm run test:esm

    - name: Upload code coverage
      if: github.repository == 'moleculerjs/moleculer' && matrix.node-version == '22.x'
      uses: coverallsapp/github-action@v2

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 test
 
on:
  push:
    branches:
      - '**'
    paths-ignore:
      - 'benchmark/**'
      - 'dev/**'
      - 'examples/**'
      - '*.md'
 
  pull_request:
    branches:
      - master
    paths-ignore:
      - 'benchmark/**'
      - 'dev/**'
      - 'examples/**'
      - '*.md'
 
concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true
 
jobs:
  test:
    timeout-minutes: 30
    runs-on: latchkey-small
    strategy:
      matrix:
        node-version: [22.x, 24.x]
      fail-fast: false
 
    steps:
    - uses: actions/checkout@v4
 
    - name: Use Node.js ${{ matrix.node-version }}
      uses: actions/setup-node@v4
      with:
        cache: 'npm'
        node-version: ${{ matrix.node-version }}
 
    - name: Cache node modules
      uses: actions/cache@v4
      env:
        cache-name: cache-node-modules
      with:
        # npm cache files are stored in `~/.npm` on Linux/macOS
        path: ~/.npm
        key: ${{ runner.os }}-build-${{ env.cache-name }}-${{ hashFiles('**/package-lock.json') }}
        restore-keys: |
          ${{ runner.os }}-build-${{ env.cache-name }}-
          ${{ runner.os }}-build-
          ${{ runner.os }}-
 
    - name: Disable proto
      run: export NODE_OPTIONS=--disable-proto=delete
 
    - name: Install dependencies
      run: npm ci
 
    - name: Execute unit tests
      run: npm run test
 
    - name: Execute Typescript tests
      run: npm run test:ts
 
    - name: Execute ESM tests
      run: npm run test:esm
 
    - name: Upload code coverage
      if: github.repository == 'moleculerjs/moleculer' && matrix.node-version == '22.x'
      uses: coverallsapp/github-action@v2

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 1 job (2 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 actions/cache