Learning Lighthouse CI from scratch (quickstart)

April 2, 2022 ยท View on GitHub

version

Just one of the things I'm learning. https://github.com/hchiam/learning

Have Lighthouse CI tool run with Travis for every commit or PR to a web app project hosted on GitHub.

Results upon commit

Build Status

Automated test run info here: https://travis-ci.org/hchiam/learning-lighthouse-ci/builds (or click on the badge above). Update: Since June 15th, 2021, building on travis-ci.org "ceased", so you should use travis-ci.com from now on. Some of the old .org links have stopped working, so here's the .com builds page: https://app.travis-ci.com/github/hchiam/learning-lighthouse-ci/builds Also, you may want to use free GitHub Actions instead.

Example PR here (click "View details"): https://github.com/hchiam/learning-lighthouse-ci/pull/1#issuecomment-555602268

Setup steps (if you git clone this repo)

  1. To test the web app locally:

    npm install
npm start

    and in a separate CLI tab:

    npm run build
npm install -g @lhci/cli@0.3.x
lhci autorun

  2. To test the web app upon commit/PR:

Setup steps (if you're starting from an empty folder)

  1. For lhci autorun to work, you need a web app set up that has things like a dist or public folder, etc. To do that, you can run a one-liner command to set up a React app:

    # cd to desktop or containing folder
create-react-app my-app

  2. To make sure it's working locally:

    cd my-app
npm start

    and in another CLI tab:

    cd my-app
npm install -g @lhci/cli@0.3.x
lhci autorun

  3. The key is setting up the Travis file .travis.yml:

    language: node_js
node_js:
  - 10
before_install:
  - npm install -g @lhci/cli@0.3.x
script:
  - npm run build
  - lhci autorun
addons:
  chrome: stable

Aside

If you want to see a report with more details (e.g. vulnerable libraries -> which specific ones), use a different CLI tool: run lighthouse locally:

npm install -g lighthouse
lighthouse https://airhorner.com/
# lighthouse <url>

Then open the generated html file.