Continuous Integration workflow (nock/nock)

The Continuous Integration workflow from nock/nock, explained and optimized by Latchkey.

CI health: C - fair

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Source: nock/nock.github/workflows/continuous-integration.yamlLicense MITView source

What it does

This is the Continuous Integration workflow from the nock/nock 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: Continuous Integration
'on':
  pull_request:
    types:
      - opened
      - synchronize
  push:
    branches:
      - '*.x'
      - main
      - beta
      - next
permissions:
  contents: read

jobs:
  format:
    name: Format
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v7
        with:
          persist-credentials: false
      - name: Setup Node
        uses: actions/setup-node@v6
        with:
          node-version: lts/*
          cache: 'npm'
      - name: Install dependencies
        run: npm ci --ignore-scripts --no-audit --no-progress --prefer-offline
      - name: Format
        run: npm run format
  lint-javascript:
    name: Lint JavaScript
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v7
        with:
          persist-credentials: false
      - name: Setup Node.js
        uses: actions/setup-node@v6
        with:
          node-version: lts/*
          cache: 'npm'
      - name: Install dependencies
        run: npm ci --ignore-scripts --no-audit --no-progress --prefer-offline
      - name: Lint
        run: npm run lint:js
  lint-typescript:
    name: Lint TypeScript declaration files
    runs-on: ubuntu-latest
    # skip this for now because we are using outdated dtslint which doesn't support newer TypeScript features.
    if: ${{ false }}
    steps:
      - name: Checkout
        uses: actions/checkout@v7
        with:
          persist-credentials: false
      - name: Setup Node.js
        uses: actions/setup-node@v6
        with:
          node-version: lts/*
          cache: 'npm'
      - name: Install dependencies
        run: npm ci --ignore-scripts --no-audit --no-progress --prefer-offline
      - name: Lint
        run: |
          npm run lint:ts

  # verify against ranges defined as supported in engines.node
  test_matrix:
    strategy:
      fail-fast: false
      matrix:
        node-version:
          - 18
          - 20
          - 22
        os:
          - macos-latest
          - ubuntu-latest
          - windows-latest
    runs-on: ${{ matrix.os }}
    timeout-minutes: 5

    steps:
      - name: Checkout
        uses: actions/checkout@v7
        with:
          persist-credentials: false
      - name: Setup Node.js
        uses: actions/setup-node@v6
        with:
          node-version: ${{ matrix.node-version }}
          cache: 'npm'
      - name: Install dependencies
        run: npm ci --ignore-scripts --no-audit --no-progress --prefer-offline
      - name: Test
        run: npm run test
      - name: Test jest
        run: npm run test:jest

  # separate job to set as required in branch protection,
  # as the build names above change each time Node versions change
  test:
    runs-on: ubuntu-latest
    needs:
      - test_matrix
    if: ${{ !cancelled() }}
    steps:
      - name: All matrix versions passed
        if: ${{ !(contains(needs.*.result, 'failure')) }}
        run: exit 0
      - name: Some matrix version failed
        if: ${{ contains(needs.*.result, 'failure') }}
        run: exit 1

The same workflow, on Latchkey

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

name: Continuous Integration
'on':
  pull_request:
    types:
      - opened
      - synchronize
  push:
    branches:
      - '*.x'
      - main
      - beta
      - next
permissions:
  contents: read
 
concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true
 
jobs:
  format:
    timeout-minutes: 30
    name: Format
    runs-on: latchkey-small
    steps:
      - name: Checkout
        uses: actions/checkout@v7
        with:
          persist-credentials: false
      - name: Setup Node
        uses: actions/setup-node@v6
        with:
          node-version: lts/*
          cache: 'npm'
      - name: Install dependencies
        run: npm ci --ignore-scripts --no-audit --no-progress --prefer-offline
      - name: Format
        run: npm run format
  lint-javascript:
    timeout-minutes: 30
    name: Lint JavaScript
    runs-on: latchkey-small
    steps:
      - name: Checkout
        uses: actions/checkout@v7
        with:
          persist-credentials: false
      - name: Setup Node.js
        uses: actions/setup-node@v6
        with:
          node-version: lts/*
          cache: 'npm'
      - name: Install dependencies
        run: npm ci --ignore-scripts --no-audit --no-progress --prefer-offline
      - name: Lint
        run: npm run lint:js
  lint-typescript:
    timeout-minutes: 30
    name: Lint TypeScript declaration files
    runs-on: latchkey-small
    # skip this for now because we are using outdated dtslint which doesn't support newer TypeScript features.
    if: ${{ false }}
    steps:
      - name: Checkout
        uses: actions/checkout@v7
        with:
          persist-credentials: false
      - name: Setup Node.js
        uses: actions/setup-node@v6
        with:
          node-version: lts/*
          cache: 'npm'
      - name: Install dependencies
        run: npm ci --ignore-scripts --no-audit --no-progress --prefer-offline
      - name: Lint
        run: |
          npm run lint:ts
 
  # verify against ranges defined as supported in engines.node
  test_matrix:
    strategy:
      fail-fast: false
      matrix:
        node-version:
          - 18
          - 20
          - 22
        os:
          - macos-latest
          - ubuntu-latest
          - windows-latest
    runs-on: ${{ matrix.os }}
    timeout-minutes: 5
 
    steps:
      - name: Checkout
        uses: actions/checkout@v7
        with:
          persist-credentials: false
      - name: Setup Node.js
        uses: actions/setup-node@v6
        with:
          node-version: ${{ matrix.node-version }}
          cache: 'npm'
      - name: Install dependencies
        run: npm ci --ignore-scripts --no-audit --no-progress --prefer-offline
      - name: Test
        run: npm run test
      - name: Test jest
        run: npm run test:jest
 
  # separate job to set as required in branch protection,
  # as the build names above change each time Node versions change
  test:
    timeout-minutes: 30
    runs-on: latchkey-small
    needs:
      - test_matrix
    if: ${{ !cancelled() }}
    steps:
      - name: All matrix versions passed
        if: ${{ !(contains(needs.*.result, 'failure')) }}
        run: exit 0
      - name: Some matrix version failed
        if: ${{ contains(needs.*.result, 'failure') }}
        run: exit 1

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 5 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