JavaScript Build and Lint workflow (developmentseed/lonboard)

The JavaScript Build and Lint workflow from developmentseed/lonboard, explained and optimized by Latchkey.

What it does

This is the JavaScript Build and Lint workflow from the developmentseed/lonboard 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

name: JavaScript Build and Lint

on:
  push:
    branches:
      - "main"
  pull_request:

concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true

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

    steps:
      - name: Checkout
        uses: actions/checkout@v7

      - uses: pnpm/action-setup@v6

      # Note: this should stay synced with the volta-pinned version in
      # package.json
      - uses: actions/setup-node@v6
        with:
          node-version: "22"
          cache: "pnpm"

      - name: Install
        run: pnpm install --frozen-lockfile

      - name: Biome check
        run: pnpm run check

The same workflow, on Latchkey

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

name: JavaScript Build and Lint
 
on:
  push:
    branches:
      - "main"
  pull_request:
 
concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true
 
jobs:
  build-and-lint:
    timeout-minutes: 30
    runs-on: latchkey-small
 
    steps:
      - name: Checkout
        uses: actions/checkout@v7
 
      - uses: pnpm/action-setup@v6
 
      # Note: this should stay synced with the volta-pinned version in
      # package.json
      - uses: actions/setup-node@v6
        with:
          node-version: "22"
          cache: "pnpm"
 
      - name: Install
        run: pnpm install --frozen-lockfile
 
      - name: Biome check
        run: pnpm run check
 

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.
• 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 per trigger. On Latchkey the same minutes cost up to 58% less than GitHub-hosted, with zero queue time.

Actions used in this workflow