Test workflow (gorilla/mux)

The Test workflow from gorilla/mux, explained and optimized by Latchkey.

What it does

This is the Test workflow from the gorilla/mux 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

name: Test
on:
  push:
    branches:
      - main
  pull_request:
    branches:
      - main
permissions:
  contents: read
jobs:
  unit:
    strategy:
      matrix:
        go: ['1.20','1.21']
        os: [ubuntu-latest, macos-latest, windows-latest]
      fail-fast: true
    runs-on: ${{ matrix.os }}
    steps:
      - name: Checkout Code
        uses: actions/checkout@v3

      - name: Setup Go ${{ matrix.go }}
        uses: actions/setup-go@v4
        with:
          go-version: ${{ matrix.go }}
          cache: false

      - name: Run Tests
        run: go test -race -cover -coverprofile=coverage -covermode=atomic -v ./...

      - name: Upload coverage to Codecov
        uses: codecov/codecov-action@v3
        with:
          files: ./coverage

The same workflow, on Latchkey

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

name: Test
on:
  push:
    branches:
      - main
  pull_request:
    branches:
      - main
permissions:
  contents: read
concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true
 
jobs:
  unit:
    timeout-minutes: 30
    strategy:
      matrix:
        go: ['1.20','1.21']
        os: [ubuntu-latest, macos-latest, windows-latest]
      fail-fast: true
    runs-on: ${{ matrix.os }}
    steps:
      - name: Checkout Code
        uses: actions/checkout@v3
 
      - name: Setup Go ${{ matrix.go }}
        uses: actions/setup-go@v4
        with:
          go-version: ${{ matrix.go }}
          cache: false
 
      - name: Run Tests
        run: go test -race -cover -coverprofile=coverage -covermode=atomic -v ./...
 
      - name: Upload coverage to Codecov
        uses: codecov/codecov-action@v3
        with:
          files: ./coverage
 

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• Cancel superseded runs when a branch or PR gets a newer push.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