Test golang-test Build workflow (gardener/gardener)

The Test golang-test Build workflow from gardener/gardener, explained and optimized by Latchkey.

What it does

This is the Test golang-test Build workflow from the gardener/gardener repository, a real project running GitHub Actions. It is shown here with attribution under its Apache-2.0 license.

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

The workflow

name: Test golang-test Build

on:
  pull_request:
    branches:
      - master
    paths:
      - .github/workflows/golang-test-build.yaml
      - .github/workflows/golang-test-images.yaml
      - hack/tools/image/**
      - hack/tools.mk
      - hack/tools/logcheck/**
      - go.mod

jobs:
  generate-matrix:
    name: Generate Matrix
    if: ${{ github.repository == 'gardener/gardener' }}
    permissions:
      contents: read
    uses: ./.github/workflows/golang-test-images.yaml

  build-golang-test:
    name: Build golang-test
    if: ${{ github.repository == 'gardener/gardener' }}
    needs: generate-matrix
    runs-on: ubuntu-latest
    permissions:
      contents: read
    strategy:
      matrix: ${{ fromJSON(needs.generate-matrix.outputs.matrix) }}
    steps:
      - name: Checkout
        uses: actions/checkout@v7

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v4

      - name: Build golang-test
        uses: docker/build-push-action@v7
        with:
          context: .
          file: ./hack/tools/image/Dockerfile
          target: golang-test
          build-args: |
            image=${{ matrix.images.image }}
          push: false
          load: false
          cache-from: type=gha
          cache-to: type=gha,mode=max

The same workflow, on Latchkey

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

name: Test golang-test Build
 
on:
  pull_request:
    branches:
      - master
    paths:
      - .github/workflows/golang-test-build.yaml
      - .github/workflows/golang-test-images.yaml
      - hack/tools/image/**
      - hack/tools.mk
      - hack/tools/logcheck/**
      - go.mod
 
concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true
 
jobs:
  generate-matrix:
    timeout-minutes: 30
    name: Generate Matrix
    if: ${{ github.repository == 'gardener/gardener' }}
    permissions:
      contents: read
    uses: ./.github/workflows/golang-test-images.yaml
 
  build-golang-test:
    timeout-minutes: 30
    name: Build golang-test
    if: ${{ github.repository == 'gardener/gardener' }}
    needs: generate-matrix
    runs-on: latchkey-small
    permissions:
      contents: read
    strategy:
      matrix: ${{ fromJSON(needs.generate-matrix.outputs.matrix) }}
    steps:
      - name: Checkout
        uses: actions/checkout@v7
 
      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v4
 
      - name: Build golang-test
        uses: docker/build-push-action@v7
        with:
          context: .
          file: ./hack/tools/image/Dockerfile
          target: golang-test
          build-args: |
            image=${{ matrix.images.image }}
          push: false
          load: false
          cache-from: type=gha
          cache-to: type=gha,mode=max
 

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.
• 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.

2 third-party actions are referenced by a movable tag. Pin them 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:

• Container pulls and builds

This workflow runs 2 jobs per trigger. On Latchkey the same minutes cost up to 58% less than GitHub-hosted, with zero queue time.

Actions used in this workflow