CI workflow (hackjutsu/Lepton)

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

CI health: C - fair

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Source: hackjutsu/Lepton.github/workflows/ci.ymlLicense MITView source

What it does

This is the CI workflow from the hackjutsu/Lepton 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:
      - master
      - dev
  pull_request:
    types:
      - opened
      - reopened
      - synchronize
      - ready_for_review

jobs:
  lint-test-build:
    runs-on: ubuntu-latest

    steps:
      - name: Checkout
        uses: actions/checkout@v5

      - name: Set up Node
        uses: actions/setup-node@v5
        with:
          node-version-file: .nvmrc
          cache: npm

      - name: Install npm 11
        run: npm install -g npm@11

      - name: Install dependencies
        run: npm ci

      - name: Lint
        run: npm run lint

      - name: Unit tests
        run: npm run test:unit

      - name: Build verification
        run: npm run test:build

  electron-smoke:
    runs-on: ubuntu-latest
    continue-on-error: true

    steps:
      - name: Checkout
        uses: actions/checkout@v5

      - name: Set up Node
        uses: actions/setup-node@v5
        with:
          node-version-file: .nvmrc
          cache: npm

      - name: Install npm 11
        run: npm install -g npm@11

      - name: Install dependencies
        run: npm ci

      - name: Electron render smoke test
        env:
          LEPTON_SMOKE_NO_SANDBOX: '1'
        run: xvfb-run --auto-servernum npm run test:smoke

      - name: Electron login-flow smoke test
        env:
          LEPTON_SMOKE_NO_SANDBOX: '1'
        run: xvfb-run --auto-servernum npm run test:login-flow

  packaged-smoke:
    runs-on: macos-latest
    continue-on-error: true

    steps:
      - name: Checkout
        uses: actions/checkout@v5

      - name: Set up Node
        uses: actions/setup-node@v5
        with:
          node-version-file: .nvmrc
          cache: npm

      - name: Install npm 11
        run: npm install -g npm@11

      - name: Install dependencies
        run: npm ci

      - name: Packaged Electron smoke test
        env:
          CSC_FOR_PULL_REQUEST: 'true'
        run: npm run test:packaged-smoke

The same workflow, on Latchkey

Removes redundant runs and caps runaway jobs. Added and changed lines are highlighted.

name: CI
 
on:
  push:
    branches:
      - master
      - dev
  pull_request:
    types:
      - opened
      - reopened
      - synchronize
      - ready_for_review
 
concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true
 
jobs:
  lint-test-build:
    timeout-minutes: 30
    runs-on: latchkey-small
 
    steps:
      - name: Checkout
        uses: actions/checkout@v5
 
      - name: Set up Node
        uses: actions/setup-node@v5
        with:
          node-version-file: .nvmrc
          cache: npm
 
      - name: Install npm 11
        run: npm install -g npm@11
 
      - name: Install dependencies
        run: npm ci
 
      - name: Lint
        run: npm run lint
 
      - name: Unit tests
        run: npm run test:unit
 
      - name: Build verification
        run: npm run test:build
 
  electron-smoke:
    timeout-minutes: 30
    runs-on: latchkey-small
    continue-on-error: true
 
    steps:
      - name: Checkout
        uses: actions/checkout@v5
 
      - name: Set up Node
        uses: actions/setup-node@v5
        with:
          node-version-file: .nvmrc
          cache: npm
 
      - name: Install npm 11
        run: npm install -g npm@11
 
      - name: Install dependencies
        run: npm ci
 
      - name: Electron render smoke test
        env:
          LEPTON_SMOKE_NO_SANDBOX: '1'
        run: xvfb-run --auto-servernum npm run test:smoke
 
      - name: Electron login-flow smoke test
        env:
          LEPTON_SMOKE_NO_SANDBOX: '1'
        run: xvfb-run --auto-servernum npm run test:login-flow
 
  packaged-smoke:
    timeout-minutes: 30
    runs-on: macos-latest
    continue-on-error: true
 
    steps:
      - name: Checkout
        uses: actions/checkout@v5
 
      - name: Set up Node
        uses: actions/setup-node@v5
        with:
          node-version-file: .nvmrc
          cache: npm
 
      - name: Install npm 11
        run: npm install -g npm@11
 
      - name: Install dependencies
        run: npm ci
 
      - name: Packaged Electron smoke test
        env:
          CSC_FOR_PULL_REQUEST: 'true'
        run: npm run test:packaged-smoke

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.
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 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