Format workflow (remix-run/history)

The Format workflow from remix-run/history, explained and optimized by Latchkey.

What it does

This is the Format workflow from the remix-run/history 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: Format

on:
  push:
    branches:
      - main

jobs:
  format:
    runs-on: ubuntu-latest

    steps:
      - name: Cancel Previous Runs
        uses: styfle/cancel-workflow-action@0.9.1

      - name: Checkout Repository
        uses: actions/checkout@v2

      - name: Use Node.js
        uses: actions/setup-node@v2
        with:
          node-version: 14

      - name: Install dependencies
        run: yarn install --frozen-lockfile

      - name: Format
        run: npm run format --if-present

      - name: Commit
        run: |
          git config --local user.email "github-actions@remix.run"
          git config --local user.name "Remix Run Bot"

          git add .
          if [ -z "$(git status --porcelain)" ]; then
            echo "💿 no formatting changed"
            exit 0
          fi
          git commit -m "chore: format" -m "formatted $GITHUB_SHA"
          git push
          echo "💿 pushed formatting changes https://github.com/$GITHUB_REPOSITORY/commit/$(git rev-parse HEAD)"

The same workflow, on Latchkey

Estimated ~20% faster on cache hits, plus fewer wasted runs and a safer supply chain. Added and changed lines are highlighted.

name: Format
 
on:
  push:
    branches:
      - main
 
concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true
 
jobs:
  format:
    timeout-minutes: 30
    runs-on: latchkey-small
 
    steps:
      - name: Cancel Previous Runs
        uses: styfle/cancel-workflow-action@0.9.1
 
      - name: Checkout Repository
        uses: actions/checkout@v2
 
      - name: Use Node.js
        uses: actions/setup-node@v2
        with:
          cache: 'npm'
          node-version: 14
 
      - name: Install dependencies
        run: yarn install --frozen-lockfile
 
      - name: Format
        run: npm run format --if-present
 
      - name: Commit
        run: |
          git config --local user.email "github-actions@remix.run"
          git config --local user.name "Remix Run Bot"
 
          git add .
          if [ -z "$(git status --porcelain)" ]; then
            echo "💿 no formatting changed"
            exit 0
          fi
          git commit -m "chore: format" -m "formatted $GITHUB_SHA"
          git push
          echo "💿 pushed formatting changes https://github.com/$GITHUB_REPOSITORY/commit/$(git rev-parse HEAD)"
 

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.
• Cache dependency installs on the setup step so they are served from cache.
• 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.

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

Actions used in this workflow