Main workflow (looplab/fsm)

The Main workflow from looplab/fsm, explained and optimized by Latchkey.

What it does

This is the Main workflow from the looplab/fsm 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: Main

on:
  push:
    branches: [main]
  pull_request:
    branches: [main]

jobs:
  build:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v2

      - name: Set up Go
        uses: actions/setup-go@v2
        with:
          go-version: 1.16

      - name: Test
        run: go test -race -coverprofile=coverage.out ./...

      - name: Convert coverage
        uses: jandelgado/gcov2lcov-action@v1.0.5

      - name: Upload coverage
        uses: coverallsapp/github-action@master
        with:
          github-token: ${{ secrets.github_token }}
          path-to-lcov: coverage.lcov

The same workflow, on Latchkey

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

name: Main
 
on:
  push:
    branches: [main]
  pull_request:
    branches: [main]
 
concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true
 
jobs:
  build:
    timeout-minutes: 30
    runs-on: latchkey-small
    steps:
      - uses: actions/checkout@v2
 
      - name: Set up Go
        uses: actions/setup-go@v2
        with:
          go-version: 1.16
 
      - name: Test
        run: go test -race -coverprofile=coverage.out ./...
 
      - name: Convert coverage
        uses: jandelgado/gcov2lcov-action@v1.0.5
 
      - name: Upload coverage
        uses: coverallsapp/github-action@master
        with:
          github-token: ${{ secrets.github_token }}
          path-to-lcov: coverage.lcov
 

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• Cancel superseded runs when a branch or PR gets a newer push.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

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