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uptime-kuma/CONTRIBUTING.md
Louis Lam 6af44e0780 ChatGPT fixed my horrible grammar
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Project Info

First of all, I want to thank everyone who made pull requests for Uptime Kuma. I never thought the GitHub Community would be so nice! Because of this, I also never thought that other people would actually read and edit my code. It is not very well structured or commented, sorry about that.

The project was created with vite.js (vue3). Then I created a subdirectory called "server" for server part. Both frontend and backend share the same package.json.

The frontend code build into "dist" directory. The server (express.js) exposes the "dist" directory as root of the endpoint. This is how production is working.

Key Technical Skills

  • Node.js (You should know what are promise, async/await and arrow function etc.)
  • Socket.io
  • SCSS
  • Vue.js
  • Bootstrap
  • SQLite

Directories

  • config (dev config files)
  • data (App data)
  • db (Base database and migration scripts)
  • dist (Frontend build)
  • docker (Dockerfiles)
  • extra (Extra useful scripts)
  • public (Frontend resources for dev only)
  • server (Server source code)
  • src (Frontend source code)
  • test (unit test)

Can I create a pull request for Uptime Kuma?

Yes or no, it depends on what you will try to do. Since I don't want to waste your time, be sure to create an empty draft pull request or open an issue, so we can have a discussion first. Especially for a large pull request or you don't know it will be merged or not.

Here are some references:

✅ Usually Accept:

  • Bug fix
  • Security fix
  • Adding notification providers
  • Adding new language files (You should go to https://weblate.kuma.pet for existing languages)
  • Adding new language keys: $t("...")

⚠️ Discussion First

  • Large pull requests
  • New features

❌ Won't Merge

  • A dedicated pr for translating existing languages (You can now translate on https://weblate.kuma.pet)
  • Do not pass the auto test
  • Any breaking changes
  • Duplicated pull requests
  • Buggy
  • UI/UX is not close to Uptime Kuma
  • Modifications or deletions of existing logic without a valid reason.
  • Adding functions that is completely out of scope
  • Converting existing code into other programming languages
  • Unnecessarily large code changes that are hard to review and cause conflicts with other PRs.

The above cases may not cover all possible situations.

I (@louislam) have the final say. If your pull request does not meet my expectations, I will reject it, no matter how much time you spend on it. Therefore, it is essential to have a discussion beforehand.

I will mark your pull request in the milestones, if I am plan to review and merge it.

Also, please don't rush or ask for ETA, because I have to understand the pull request, make sure it is no breaking changes and stick to my vision of this project, especially for large pull requests.

Recommended Pull Request Guideline

Before deep into coding, discussion first is preferred. Creating an empty pull request for discussion would be recommended.

  1. Fork the project
  2. Clone your fork repo to local
  3. Create a new branch
  4. Create an empty commit git commit -m "[empty commit] pull request for <YOUR TASK NAME>" --allow-empty
  5. Push to your fork repo
  6. Create a pull request: https://github.com/louislam/uptime-kuma/compare
  7. Write a proper description
  8. Click "Change to draft"
  9. Discussion

Project Styles

I personally do not like something that requires so many configurations before you can finally start the app. I hope Uptime Kuma installation could be as easy as like installing a mobile app.

  • Easy to install for non-Docker users, no native build dependency is needed (for x86_64/armv7/arm64), no extra config, no extra effort required to get it running
  • Single container for Docker users, no very complex docker-compose file. Just map the volume and expose the port, then good to go
  • Settings should be configurable in the frontend. Environment variable is not encouraged, unless it is related to startup such as DATA_DIR
  • Easy to use
  • The web UI styling should be consistent and nice

Coding Styles

  • 4 spaces indentation
  • Follow .editorconfig
  • Follow ESLint
  • Methods and functions should be documented with JSDoc

Name Conventions

  • Javascript/Typescript: camelCaseType
  • SQLite: snake_case (Underscore)
  • CSS/SCSS: kebab-case (Dash)

Tools

  • Node.js >= 14
  • NPM >= 8.5
  • Git
  • IDE that supports ESLint and EditorConfig (I am using IntelliJ IDEA)
  • A SQLite GUI tool (SQLite Expert Personal is suggested)

Install Dependencies for Development

npm ci

Dev Server

(2022-04-26 Update)

We can start the frontend dev server and the backend dev server in one command.

Port 3000 and port 3001 will be used.

npm run dev

But sometimes, you would like to keep restart the server, but not the frontend, you can run these command in two terminals:

npm run start-frontend-dev
npm run start-server-dev

Backend Server

It binds to 0.0.0.0:3001 by default.

It is mainly a socket.io app + express.js.

express.js is used for:

  • entry point such as redirecting to a status page or the dashboard
  • serving the frontend built files (index.html, .js and .css etc.)
  • serving internal APIs of status page

Structure in /server/

  • jobs/ (Jobs that are running in another process)
  • model/ (Object model, auto mapping to the database table name)
  • modules/ (Modified 3rd-party modules)
  • monitor_types (Monitor Types)
  • notification-providers/ (individual notification logic)
  • routers/ (Express Routers)
  • socket-handler (Socket.io Handlers)
  • server.js (Server entry point)
  • uptime-kuma-server.js (UptimeKumaServer class, main logic should be here, but some still in server.js)

Frontend Dev Server

It binds to 0.0.0.0:3000 by default. Frontend dev server is used for development only.

For production, it is not used. It will be compiled to dist directory instead.

You can use Vue.js devtools Chrome extension for debugging.

Build the frontend

npm run build

Frontend Details

Uptime Kuma Frontend is a single page application (SPA). Most paths are handled by Vue Router.

The router is in src/router.js

As you can see, most data in frontend is stored in root level, even though you changed the current router to any other pages.

The data and socket logic are in src/mixins/socket.js.

Database Migration

  1. Create patch-{name}.sql in ./db/
  2. Add your patch filename in the patchList list in ./server/database.js

Unit Test

npm run build
npm test

Dependencies

Both frontend and backend share the same package.json. However, the frontend dependencies are eventually not used in the production environment, because it is usually also baked into dist files. So:

  • Frontend dependencies = "devDependencies"
    • Examples: vue, chart.js
  • Backend dependencies = "dependencies"
    • Examples: socket.io, sqlite3
  • Development dependencies = "devDependencies"
    • Examples: eslint, sass

Update Dependencies

Since previously updating Vite 2.5.10 to 2.6.0 broke the application completely, from now on, it should update patch release version only.

Patch release = the third digit (Semantic Versioning)

If for maybe security reasons, a library must be updated. Then you must need to check if there are any breaking changes.

Translations

Please read: https://github.com/louislam/uptime-kuma/tree/master/src/languages

Wiki

Since there is no way to make a pull request to wiki's repo, I have set up another repo to do that.

https://github.com/louislam/uptime-kuma-wiki

Maintainer

Check the latest issues and pull requests: https://github.com/louislam/uptime-kuma/issues?q=sort%3Aupdated-desc

Release Procedures

  1. Draft a release note
  2. Make sure the repo is cleared
  3. If the healthcheck is updated, remember to re-compile it: npm run build-docker-builder-go
  4. npm run release-final with env vars: VERSIONandGITHUB_TOKEN`
  5. Wait until the Press any key to continue
  6. git push
  7. Publish the release note as 1.X.X
  8. Press any key to continue
  9. Deploy to the demo server: npm run deploy-demo-server

Checking:

Release Beta Procedures

  1. Draft a release note, check "This is a pre-release"
  2. Make sure the repo is cleared
  3. npm run release-beta with env vars: VERSION and GITHUB_TOKEN
  4. Wait until the Press any key to continue
  5. Publish the release note as 1.X.X-beta.X
  6. Press any key to continue

Release Wiki

Setup Repo

git clone https://github.com/louislam/uptime-kuma-wiki.git
cd uptime-kuma-wiki
git remote add production https://github.com/louislam/uptime-kuma.wiki.git

Push to Production Wiki

git pull
git push production master