create-fastify-oop-decorators

The official scaffolding CLI tool to quickly bootstrap a Fastify application using fastify-oop-decorators.

Get a NestJS-like Developer Experience (DX) with the raw performance of Fastify in seconds.

Features

• Interactive CLI: A smooth, interactive prompt to configure your project.
• TypeScript Ready: Pre-configured tsconfig.json with strict mode, experimentalDecorators, and emitDecoratorMetadata.
• Modular Architecture: Generates an enterprise-ready folder structure (Controllers, Services, Modules, and Plugins).
• Validation Options: Choose between native Fastify JSON schemas or class-based DTOs via ajv-decorators.
• Linter Support: Out-of-the-box configuration for ESLint or Biome.
• Package Manager Agnostic: Works flawlessly with npm, pnpm, yarn, and bun.

Quick Start

The easiest way to get started is to use npx. Run the following command in your terminal:

npx create-fastify-oop-decorators@latest my-awesome-api

You will be prompted to choose your preferences:

• Which package manager to use?
• Would you like to use ajv-decorators for class-based DTO validation?
• Which linter would you like to use (ESLint, Biome, or none)?

Once the setup is complete, navigate into your new project and start the development server:

cd my-awesome-api
npm run dev

Non-Interactive Mode (CLI Flags)

You can bypass the interactive prompts by passing command-line arguments. This is perfect for CI/CD environments or quick setups.

npx create-fastify-oop-decorators@latest my-api --use-pnpm --ajv --biome --yes

Available Options:

| Flag | Description | | --- | --- | | --use-npm | Explicitly use npm to install dependencies. | | --use-pnpm | Explicitly use pnpm to install dependencies. | | --use-yarn | Explicitly use yarn to install dependencies. | | --use-bun | Explicitly use bun to install dependencies. | | --ajv / --no-ajv | Include (or exclude) ajv-decorators for DTO validation. | | --eslint | Initialize the project with an ESLint configuration. | | --biome | Initialize the project with a Biome configuration. | | --no-linter | Skip linter configuration entirely. | | --yes | Use your previously saved preferences (or defaults) without prompting. | | --reset-preferences | Clear the saved preferences from your machine. |

Generated Project Structure

By default, the CLI generates a modular, enterprise-ready architecture:

my-awesome-api/
├── src/
│   ├── hello/
│   │   ├── dto/
│   │   │   └── sayHelloPost.dto.ts  # (If ajv-decorators is enabled)
│   │   ├── hello.controller.ts      # Example Controller
│   │   ├── hello.module.ts          # Module grouping Controller & Service
│   │   └── hello.service.ts         # Example injectable Service
│   ├── plugins/
│   │   ├── ajv-decorators-plugin.ts # (If ajv-decorators is enabled)
│   │   └── bootstrap-plugin.ts      # Fastify OOP injection setup
│   ├── app.module.ts                # Root module
│   ├── build-app.ts                 # Fastify instance builder (Great for testing!)
│   └── index.ts                     # Entry point (Server listen)
├── package.json
├── tsconfig.json
└── eslint.config.mjs / biome.json   # Depending on your linter choice

Available Scripts

Inside your newly created project, you can run:

• npm run dev: Starts the application in watch mode using tsx.
• npm run build: Compiles the TypeScript code into the dist/ folder.
• npm start: Runs the compiled application.
• npm run lint: Runs your chosen linter (ESLint or Biome) to check your codebase.

Related Projects

• fastify-oop-decorators: The core library powering this architecture.
• ajv-decorators: Native Fastify JSON schemas generation using classes and decorators.

License

This project is licensed under the MIT License.