Quickstart

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Working with Typeconf

Typeconf helps you manage configurations by keeping them in a separate directory, which acts as a configuration repository or package for your project. The configuration directory contains three main components:

• Schema: Located at src/main.tsp
• Values file: Located at src/values.config.ts
• Output JSON file: Located at out/<config-name>.json

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Setting Up the Configuration Directory

To begin using Typeconf, you need to create the configuration directory. Run the following command to generate the necessary boilerplate:

npx create-typeconf-package

After that, you can open a separate terminal window and run this command to automatically recompile the schema and configuration values whenever you make changes:

npm run build:watch

Alternatively, you can manually run npm run build whenever you make changes to the configuration files.

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Creating a new config

In Typeconf, configurations are defined using schemas and values separately. The schema is written using a TypeSpec-based language, which is a TypeScript-like syntax. Learn more about TypeSpec here.

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Defining the schema

To modify the schema, locate the src/main.tsp file. Here’s an example schema:

model DebuggingConfig {
  enableLogging: boolean;
  maxRetries: int32;
  timeout: duration;
}

model PetServiceConfig {
  showBreed: boolean;
  petTypes: string[];
  debugging: DebuggingConfig;
}

Refer to the TypeSpec documentation for additional examples and language features.

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Setting Config Values

To set the values for your config, edit the src/values.config.ts file. Below is an example of how to configure the values corresponding to the schema above:

import { DebuggingConfig, PetServiceConfig } from '@root/types/all.js'
let debuggingConfig: DebuggingConfig = {
  enableLogging: true,
  maxRetries: 10,
  timeout: "500ms",
};
let config: PetServiceConfig = {
  showBreed: true,
  petTypes: ["dog", "cat"],
  debugging: debuggingConfig,
};

export default config;

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Generating the Output JSON File

After editing the schema and values you should be able to locate the JSON file in the out/ directory. Please make sure that you have ran npm run build or that you have npm run build:watch running in the background.

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Using the config in your code

To use your configuration in your code, you can install the configuration package you just created as a dependency. Once installed, you can read the configuration from any JSON file like this:

import { ProductConfig, readConfigFromFile } from "you-config-package";

let conf: ProductConfig = readConfigFromFile("path/to/config.json");

Pro tip: If you want to use the configuration package before pushing it to the package registry, you can use this handy tool:

npx link@latest <path/to/package>

For more examples, check out the examples in the repository.