onion-transformer is a TypeScript transformer designed to simplify Dependency Injection (DI) in the Onion architecture. It automatically transforms TypeScript code to make dependency injections simpler and less error-prone.

• Automatic DI Metadata Addition: Simplifies dependency injection by automatically adding necessary metadata.
• Type safe DI: Types check on compile type
• Decorator Support: Recognizes and processes decorators used for dependency injections.
• Compatibility: Designed to work seamlessly with the Onion DI package, ensuring smooth integration.

Install onion-transformer using npm or yarn:

npm install onion-transformer --save-dev

# or

yarn add onion-transformer --dev

npx ts-patch install

This step modifies the TypeScript compiler to support custom transformers.

To use onion-transformer in your project, add it to your TypeScript configuration (usually tsconfig.json) under compilerOptions.plugins:

{
  "compilerOptions": {
    "plugins": [
      {
        "transform": "onion-transformer"
      }
    ]
  }
}

@Service()
class MyService {
  constructor(@Inject() private myOtherService: MyOtherService) {}
}

@Service({ name: "MyService" })
class MyService {
  constructor(@Inject({ name: "MyOtherService" }) private myOtherService: MyOtherService) {}
}

• git clone https://github.com/Isqanderm/onion-transformer.git
• cd transformer
• npm install
• cd examples