Build workflow (DarthSim/overmind)

The Build workflow from DarthSim/overmind, explained and optimized by Latchkey.

What it does

This is the Build workflow from the DarthSim/overmind 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: Build

on:
  - push
  - pull_request

jobs:
  build:
    runs-on: ubuntu-latest
    strategy:
      matrix:
        go-version: ["1.18.x", "1.19.x", "1.20.x", "1.21.x"]
    steps:
      - name: Checkout
        uses: actions/checkout@v3
      - uses: actions/setup-go@v3
        with:
          go-version: ${{ matrix.go-version }}
      - name: Cache mods
        uses: actions/cache@v3
        with:
          path: |
            ~/.cache/go-build
            ~/go/pkg/mod
          key: ${{ runner.os }}-go-${{ matrix.go-version }}-${{ hashFiles('**/go.sum') }}
      - name: Download mods
        run: go mod download
      - name: Build
        run: go build

The same workflow, on Latchkey

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

name: Build
 
on:
  - push
  - pull_request
 
concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true
 
jobs:
  build:
    timeout-minutes: 30
    runs-on: latchkey-small
    strategy:
      matrix:
        go-version: ["1.18.x", "1.19.x", "1.20.x", "1.21.x"]
    steps:
      - name: Checkout
        uses: actions/checkout@v3
      - uses: actions/setup-go@v3
        with:
          go-version: ${{ matrix.go-version }}
      - name: Cache mods
        uses: actions/cache@v3
        with:
          path: |
            ~/.cache/go-build
            ~/go/pkg/mod
          key: ${{ runner.os }}-go-${{ matrix.go-version }}-${{ hashFiles('**/go.sum') }}
      - name: Download mods
        run: go mod download
      - name: Build
        run: go build
 

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• Cancel superseded runs when a branch or PR gets a newer push.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

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:

• Dependency installs

This workflow runs 1 job (4 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