coverage workflow (charmbracelet/glamour)

The coverage workflow from charmbracelet/glamour, explained and optimized by Latchkey.

What it does

This is the coverage workflow from the charmbracelet/glamour 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: coverage
on: [push, pull_request]

jobs:
  coverage:
    runs-on: ubuntu-latest
    env:
      GO111MODULE: "on"
    steps:
      - name: Checkout code
        uses: actions/checkout@v6

      - name: Install Go
        uses: actions/setup-go@v6
        with:
          go-version: stable

      - name: Coverage
        env:
          COVERALLS_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          go test -race -covermode atomic -coverprofile=profile.cov ./...
          go install github.com/mattn/goveralls@latest
          goveralls -coverprofile=profile.cov -service=github

The same workflow, on Latchkey

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

name: coverage
on: [push, pull_request]
 
concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true
 
jobs:
  coverage:
    timeout-minutes: 30
    runs-on: latchkey-small
    env:
      GO111MODULE: "on"
    steps:
      - name: Checkout code
        uses: actions/checkout@v6
 
      - name: Install Go
        uses: actions/setup-go@v6
        with:
          go-version: stable
 
      - name: Coverage
        env:
          COVERALLS_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          go test -race -covermode atomic -coverprofile=profile.cov ./...
          go install github.com/mattn/goveralls@latest
          goveralls -coverprofile=profile.cov -service=github
 

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• Cancel superseded runs when a branch or PR gets a newer push.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

This workflow runs 1 job per trigger. On Latchkey the same minutes cost up to 58% less than GitHub-hosted, with zero queue time.

Actions used in this workflow