Bundler Friendly workflow (prettier/prettier)

The Bundler Friendly workflow from prettier/prettier, explained and optimized by Latchkey.

CI health: A - excellent

Point runs-on at Latchkey and get job timeouts, self-healing for flaky steps, and up to 58% lower cost, applied automatically.

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Source: prettier/prettier.github/workflows/bundler-friendly.ymlLicense MITView source

What it does

This is the Bundler Friendly workflow from the prettier/prettier 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

workflow (.yml)

name: Bundler Friendly

on:
  schedule:
    # “At 00:00 on Sunday.” https://crontab.guru/#0_0_*_*_SUN
    - cron: "0 0 * * SUN"
  pull_request:
    paths:
      - "scripts/tools/bundle-test/**"
      # This workflow file
      - ".github/workflows/bundler-friendly.yml"

permissions:
  contents: read

concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true

jobs:
  build:
    if: github.event_name != 'schedule' || github.repository == 'prettier/prettier'
    name: Build
    uses: ./.github/workflows/_build.yml

  webpack:
    if: github.event_name != 'schedule' || github.repository == 'prettier/prettier'
    name: Bundle Prettier with webpack
    runs-on: ubuntu-latest
    needs: [build]
    steps:
      - name: Checkout
        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0

      - name: Setup Node.js
        uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0
        with:
          cache: "yarn"

      - name: Install Dependencies
        run: yarn install --immutable

      - name: Download Artifact
        uses: actions/download-artifact@3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c # v8.0.1
        with:
          name: dist
          path: dist

      - name: Install Dependencies
        working-directory: scripts/tools/bundle-test
        run: yarn install --immutable

      - name: Test
        working-directory: scripts/tools/bundle-test
        run: yarn test

The same workflow, on Latchkey

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

name: Bundler Friendly
 
on:
  schedule:
    # “At 00:00 on Sunday.” https://crontab.guru/#0_0_*_*_SUN
    - cron: "0 0 * * SUN"
  pull_request:
    paths:
      - "scripts/tools/bundle-test/**"
      # This workflow file
      - ".github/workflows/bundler-friendly.yml"
 
permissions:
  contents: read
 
concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true
 
jobs:
  build:
    timeout-minutes: 30
    if: github.event_name != 'schedule' || github.repository == 'prettier/prettier'
    name: Build
    uses: ./.github/workflows/_build.yml
 
  webpack:
    timeout-minutes: 30
    if: github.event_name != 'schedule' || github.repository == 'prettier/prettier'
    name: Bundle Prettier with webpack
    runs-on: latchkey-small
    needs: [build]
    steps:
      - name: Checkout
        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
 
      - name: Setup Node.js
        uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0
        with:
          cache: "yarn"
 
      - name: Install Dependencies
        run: yarn install --immutable
 
      - name: Download Artifact
        uses: actions/download-artifact@3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c # v8.0.1
        with:
          name: dist
          path: dist
 
      - name: Install Dependencies
        working-directory: scripts/tools/bundle-test
        run: yarn install --immutable
 
      - name: Test
        working-directory: scripts/tools/bundle-test
        run: yarn test

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

Actions used in this workflow

actions/checkout actions/setup-node actions/download-artifact