eslint workflow (jupyterhub/binderhub)

The eslint workflow from jupyterhub/binderhub, explained and optimized by Latchkey.

CI health: C - fair

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Source: jupyterhub/binderhub.github/workflows/eslint.ymlLicense BSD-3-ClauseView source

What it does

This is the eslint workflow from the jupyterhub/binderhub repository, a real project running GitHub Actions. It is shown here with attribution under its BSD-3-Clause license.

Below, Latchkey shows a faster, safer version produced by its optimization engine.

The workflow

workflow (.yml)

# Lints the binderhub/static/js folders content with eslint, influenced by
# ".eslintrc.js", by running "npm run lint" where "lint" is a command defined in
# package.json.
#
name: eslint

on:
  pull_request:
    paths:
      - ".github/workflows/eslint.yml"
      - ".eslintrc.js"
      - "package.json"
      - "binderhub/static/js/**"
      - "js/**"
  push:
    paths:
      - ".github/workflows/eslint.yml"
      - ".eslintrc.js"
      - "package.json"
      - "binderhub/static/js/**"
      - "js/**"
    branches-ignore:
      - "dependabot/**"
      - "pre-commit-ci-update-config"
      - "update-*"
  workflow_dispatch:

jobs:
  build:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v7

      - run: npm install

      - run: npm run lint

The same workflow, on Latchkey

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

# Lints the binderhub/static/js folders content with eslint, influenced by
# ".eslintrc.js", by running "npm run lint" where "lint" is a command defined in
# package.json.
#
name: eslint
 
on:
  pull_request:
    paths:
      - ".github/workflows/eslint.yml"
      - ".eslintrc.js"
      - "package.json"
      - "binderhub/static/js/**"
      - "js/**"
  push:
    paths:
      - ".github/workflows/eslint.yml"
      - ".eslintrc.js"
      - "package.json"
      - "binderhub/static/js/**"
      - "js/**"
    branches-ignore:
      - "dependabot/**"
      - "pre-commit-ci-update-config"
      - "update-*"
  workflow_dispatch:
 
concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true
 
jobs:
  build:
    timeout-minutes: 30
    runs-on: latchkey-small
    steps:
      - uses: actions/checkout@v7
 
      - run: npm install
 
      - run: npm run lint

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.

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

actions/checkout