CI workflow (egoist/tsup)

The CI workflow from egoist/tsup, explained and optimized by Latchkey.

What it does

This is the CI workflow from the egoist/tsup 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: CI

on:
  push:
    branches:
      - main

  pull_request:
    branches:
      - main

jobs:
  test:
    strategy:
      matrix:
        os: [ubuntu-latest, windows-latest]
        node-version: [18, 20, 22]

    runs-on: ${{ matrix.os }}

    # Steps represent a sequence of tasks that will be executed as part of the job
    steps:
      # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
      - uses: actions/checkout@v4

      - uses: pnpm/action-setup@v4.1.0
        name: Install pnpm

      - uses: actions/setup-node@v4
        with:
          node-version: ${{ matrix.node-version }}
          cache: pnpm

      - name: Install deps
        run: pnpm i

      # Runs a set of commands using the runners shell
      - name: Build and Test
        run: pnpm test

The same workflow, on Latchkey

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

name: CI
 
on:
  push:
    branches:
      - main
 
  pull_request:
    branches:
      - main
 
concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true
 
jobs:
  test:
    timeout-minutes: 30
    strategy:
      matrix:
        os: [ubuntu-latest, windows-latest]
        node-version: [18, 20, 22]
 
    runs-on: ${{ matrix.os }}
 
    # Steps represent a sequence of tasks that will be executed as part of the job
    steps:
      # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
      - uses: actions/checkout@v4
 
      - uses: pnpm/action-setup@v4.1.0
        name: Install pnpm
 
      - uses: actions/setup-node@v4
        with:
          node-version: ${{ matrix.node-version }}
          cache: pnpm
 
      - name: Install deps
        run: pnpm i
 
      # Runs a set of commands using the runners shell
      - name: Build and Test
        run: pnpm test
 

What changed

• Cancel superseded runs when a branch or PR gets a newer push.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.

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.

This workflow runs 1 job (6 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