coverage workflow (charmbracelet/bubbletea)

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

What it does

This is the coverage workflow from the charmbracelet/bubbletea 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:
    strategy:
      matrix:
        go-version: [^1]
        os: [ubuntu-latest]
    runs-on: ${{ matrix.os }}
    env:
      GO111MODULE: "on"
    steps:
      - name: Install Go
        uses: actions/setup-go@v6
        with:
          go-version: ${{ matrix.go-version }}

      - name: Checkout code
        uses: actions/checkout@v6

      - name: Coverage
        run: |
          go test -race -covermode=atomic -coverprofile=coverage.txt ./...

      - uses: codecov/codecov-action@v6
        with:
          file: ./coverage.txt
          token: ${{ secrets.CODECOV_TOKEN }}

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
    strategy:
      matrix:
        go-version: [^1]
        os: [ubuntu-latest]
    runs-on: ${{ matrix.os }}
    env:
      GO111MODULE: "on"
    steps:
      - name: Install Go
        uses: actions/setup-go@v6
        with:
          go-version: ${{ matrix.go-version }}
 
      - name: Checkout code
        uses: actions/checkout@v6
 
      - name: Coverage
        run: |
          go test -race -covermode=atomic -coverprofile=coverage.txt ./...
 
      - uses: codecov/codecov-action@v6
        with:
          file: ./coverage.txt
          token: ${{ secrets.CODECOV_TOKEN }}
 

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• Cancel superseded runs when a branch or PR gets a newer push.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 per trigger. On Latchkey the same minutes cost up to 58% less than GitHub-hosted, with zero queue time.

Actions used in this workflow