Tests: pretest/posttest workflow (es-shims/es5-shim)

The Tests: pretest/posttest workflow from es-shims/es5-shim, explained and optimized by Latchkey.

What it does

This is the Tests: pretest/posttest workflow from the es-shims/es5-shim 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: 'Tests: pretest/posttest'

on: [pull_request, push]

jobs:
  tests:
    uses: ljharb/actions/.github/workflows/pretest.yml@main

The same workflow, on Latchkey

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

name: 'Tests: pretest/posttest'
 
on: [pull_request, push]
 
concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true
 
jobs:
  tests:
    timeout-minutes: 30
    uses: ljharb/actions/.github/workflows/pretest.yml@main
 

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• Cancel superseded runs when a branch or PR gets a newer push.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 per trigger. On Latchkey the same minutes cost up to 58% less than GitHub-hosted, with zero queue time.