Test workflow (FiloSottile/mkcert)

The Test workflow from FiloSottile/mkcert, explained and optimized by Latchkey.

What it does

This is the Test workflow from the FiloSottile/mkcert repository, a real project running GitHub Actions. It is shown here with attribution under its BSD-3-Clause license.

Below, Latchkey shows a faster, safer version produced by its optimization engine.

The workflow

on: [push, pull_request]
name: Test
jobs:
  test:
    name: Go tests
    strategy:
      fail-fast: false
      matrix:
        os: [ubuntu-latest, macos-latest, windows-latest]
    runs-on: ${{ matrix.os }}
    steps:
      - name: Install Go ${{ matrix.go }}
        uses: actions/setup-go@v2
        with:
          go-version: 1.x
      - name: Checkout repository
        uses: actions/checkout@v2
      - name: Run staticcheck
        run: |
          go install honnef.co/go/tools/cmd/staticcheck@latest
          staticcheck ./...
      - name: Run tests
        run: go test -race ./...

The same workflow, on Latchkey

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

on: [push, pull_request]
name: Test
concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true
 
jobs:
  test:
    timeout-minutes: 30
    name: Go tests
    strategy:
      fail-fast: false
      matrix:
        os: [ubuntu-latest, macos-latest, windows-latest]
    runs-on: ${{ matrix.os }}
    steps:
      - name: Install Go ${{ matrix.go }}
        uses: actions/setup-go@v2
        with:
          go-version: 1.x
      - name: Checkout repository
        uses: actions/checkout@v2
      - name: Run staticcheck
        run: |
          go install honnef.co/go/tools/cmd/staticcheck@latest
          staticcheck ./...
      - name: Run tests
        run: go test -race ./...
 

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• Cancel superseded runs when a branch or PR gets a newer push.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

This workflow runs 1 job (3 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