Using Typeconf in Monorepo

This guide will walk you through setting up and using Typeconf in a monorepo environment, where you can define your configurations in a shared package and use them across multiple projects. The whole process is similar to our quickstart guide, because with the monorepo setup you can just use a separate configuration package and share it across your projects.

Setting Up the Config Package

First, create a new package in your monorepo for your shared configurations:

npx create-typeconf-package packages/configs

Defining Shared Configurations

Create your configuration definitions in the config package:

// packages/configs/src/main.tsp
model NotificationConfig {
  email: boolean;
  push: boolean;
}

model UserSettings {
  theme: string;
  notifications: Record<NotificationConfig>;
}

Create values file for your config:

// packages/configs/src/values.config.ts
import { UserSettings } from './types/all.js';

const config: UserSettings = {
  theme: 'light',
  notifications: {
    "promo": {
      email: true,
      push: false,
    },
    "alerts": {
      email: true,
      push: true,
    },
  }
};
export default config;

Build your config package:

# In packages/configs
npm run build
# or pnpm build
# or yarn build

Using the config package in other projects

Now you can use your shared configurations in other packages within your monorepo:

// packages/backend/src/index.ts
import { UserSettings, readConfigFromFile } from '@your-org/config';

const config: UserSettings = readConfigFromFile('./packages/configs/user-settings.json');

CI/CD Considerations

Build Order:
- Ensure config package is built before dependent packages
- Use tools like Turborepo or Nx for efficient builds
Validation:
- Add a CI step to build configuration before other packages
- Check for breaking changes in config updates

Here's an example Github Actions workflow to update config:

# .github/workflows/update-config.yml
name: Update Config
on: [push]
jobs:
  validate:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v2
      - name: Install dependencies
        run: npm ci
      - name: Build config
        run: cd packages/config && npm run build
      - name: Test config
        run: cd packages/config && npm test