tests workflow (facebook/stylex)

The tests workflow from facebook/stylex, explained and optimized by Latchkey.

CI health: C - fair

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

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Source: facebook/stylex.github/workflows/tests.ymlLicense MITView source

What it does

This is the tests workflow from the facebook/stylex 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: tests

on:
  push:
    branches:
      - 'main'
  pull_request:
    types: [opened, synchronize, reopened]

jobs:
  flow:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v6
      - uses: actions/setup-node@v6
        with:
          node-version: '22.x'
          cache: 'yarn'
          cache-dependency-path: yarn.lock
      - run: corepack prepare yarn@1.22.22 --activate
      - run: yarn install --frozen-lockfile
      - run: yarn flow

  packages:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v6
      - uses: actions/setup-node@v6
        with:
          node-version: '22.x'
          cache: 'yarn'
          cache-dependency-path: yarn.lock
      - run: corepack prepare yarn@1.22.22 --activate
      - run: yarn install --frozen-lockfile
      - run: yarn test:packages

  prettier:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v6
      - uses: actions/setup-node@v6
        with:
          node-version: '22.x'
          cache: 'yarn'
          cache-dependency-path: yarn.lock
      - run: corepack prepare yarn@1.22.22 --activate
      - run: yarn install --frozen-lockfile
      - run: yarn prettier:report

  lint:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v6
      - uses: actions/setup-node@v6
        with:
          node-version: '22.x'
          cache: 'yarn'
          cache-dependency-path: yarn.lock
      - run: corepack prepare yarn@1.22.22 --activate
      - run: yarn install --frozen-lockfile
      - run: yarn lint:report

  spelling:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v6
      - uses: crate-ci/typos@master
        with:
          config: .github/workflows/typos.toml

The same workflow, on Latchkey

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

name: tests
 
on:
  push:
    branches:
      - 'main'
  pull_request:
    types: [opened, synchronize, reopened]
 
concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true
 
jobs:
  flow:
    timeout-minutes: 30
    runs-on: latchkey-small
    steps:
      - uses: actions/checkout@v6
      - uses: actions/setup-node@v6
        with:
          node-version: '22.x'
          cache: 'yarn'
          cache-dependency-path: yarn.lock
      - run: corepack prepare yarn@1.22.22 --activate
      - run: yarn install --frozen-lockfile
      - run: yarn flow
 
  packages:
    timeout-minutes: 30
    runs-on: latchkey-small
    steps:
      - uses: actions/checkout@v6
      - uses: actions/setup-node@v6
        with:
          node-version: '22.x'
          cache: 'yarn'
          cache-dependency-path: yarn.lock
      - run: corepack prepare yarn@1.22.22 --activate
      - run: yarn install --frozen-lockfile
      - run: yarn test:packages
 
  prettier:
    timeout-minutes: 30
    runs-on: latchkey-small
    steps:
      - uses: actions/checkout@v6
      - uses: actions/setup-node@v6
        with:
          node-version: '22.x'
          cache: 'yarn'
          cache-dependency-path: yarn.lock
      - run: corepack prepare yarn@1.22.22 --activate
      - run: yarn install --frozen-lockfile
      - run: yarn prettier:report
 
  lint:
    timeout-minutes: 30
    runs-on: latchkey-small
    steps:
      - uses: actions/checkout@v6
      - uses: actions/setup-node@v6
        with:
          node-version: '22.x'
          cache: 'yarn'
          cache-dependency-path: yarn.lock
      - run: corepack prepare yarn@1.22.22 --activate
      - run: yarn install --frozen-lockfile
      - run: yarn lint:report
 
  spelling:
    timeout-minutes: 30
    runs-on: latchkey-small
    steps:
      - uses: actions/checkout@v6
      - uses: crate-ci/typos@master
        with:
          config: .github/workflows/typos.toml

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.

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 5 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