Lint workflow (jonobr1/two.js)

The Lint workflow from jonobr1/two.js, explained and optimized by Latchkey.

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Source: jonobr1/two.js.github/workflows/lint.ymlLicense MITView source

What it does

This is the Lint workflow from the jonobr1/two.js 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: Lint

on: [push, pull_request]

permissions: read-all

jobs:
  build:
    runs-on: ubuntu-latest
    steps:
    - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8  # v5
    - name: Install modules
      run: npm ci
    - name: Run ESLint
      run: npm run lint

  check-dependency-files:
    name: Check dependency manifest/lockfile pairs
    runs-on: ubuntu-latest
    steps:
    - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8  # v5
    - name: Verify each Dependabot-managed npm directory has package.json and package-lock.json
      shell: bash
      run: |
        dirs=("." "tests/types" "tests/typescript")
        ok=true
        for dir in "${dirs[@]}"; do
          if [ ! -f "$dir/package.json" ]; then
            echo "ERROR: $dir/package.json is missing"
            ok=false
          fi
          if [ ! -f "$dir/package-lock.json" ]; then
            echo "ERROR: $dir/package-lock.json is missing"
            ok=false
          fi
        done
        if [ "$ok" != "true" ]; then
          echo ""
          echo "Every npm directory managed by Dependabot must contain both"
          echo "package.json and package-lock.json. Run 'npm install' in the"
          echo "affected directory and commit the result."
          exit 1
        fi
        echo "All dependency file pairs are present."

The same workflow, on Latchkey

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

name: Lint
 
on: [push, pull_request]
 
permissions: read-all
 
concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true
 
jobs:
  build:
    timeout-minutes: 30
    runs-on: latchkey-small
    steps:
    - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8  # v5
    - name: Install modules
      run: npm ci
    - name: Run ESLint
      run: npm run lint
 
  check-dependency-files:
    timeout-minutes: 30
    name: Check dependency manifest/lockfile pairs
    runs-on: latchkey-small
    steps:
    - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8  # v5
    - name: Verify each Dependabot-managed npm directory has package.json and package-lock.json
      shell: bash
      run: |
        dirs=("." "tests/types" "tests/typescript")
        ok=true
        for dir in "${dirs[@]}"; do
          if [ ! -f "$dir/package.json" ]; then
            echo "ERROR: $dir/package.json is missing"
            ok=false
          fi
          if [ ! -f "$dir/package-lock.json" ]; then
            echo "ERROR: $dir/package-lock.json is missing"
            ok=false
          fi
        done
        if [ "$ok" != "true" ]; then
          echo ""
          echo "Every npm directory managed by Dependabot must contain both"
          echo "package.json and package-lock.json. Run 'npm install' in the"
          echo "affected directory and commit the result."
          exit 1
        fi
        echo "All dependency file pairs are present."

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 2 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