Cato

A powerful toolkit for building stable and maintainable Golang server-side projects.

⚠️ Important Notice: Active Development Stage This project is currently under active development and may introduce breaking changes at any time. It is not recommended for production use.

✨ What Can Cato Do?

Cato's current capabilities are provided through a series of proto-gen-* plugins.

proto-gen-cato

Note ⚠️

proto-gen-cato requires your .proto file content to adhere to the Protocol Buffers Official Style Guide. Otherwise, the generated struct field names may be difficult to understand.

This plugin provides various capabilities by using custom options from the proto directory within different scopes. For specific usage examples, please refer to the proto files in cato-example-bms (Simple Book Management System).

The responsibilities of the files in the proto directory are divided as follows:

• extension.proto: Main entry point for plugin options.
• db.proto: Options related to relational databases.
• defines.proto: Options for controlling file generation.
• http.proto: Options for generating HTTP service-related code.
• struct.proto: Options for general struct-related generation.

Install

go install -v github.com/ncuhome/cato/cmd/protoc-gen-cato@latest

Usage

First, you need to reference the *.proto files from the proto directory. Download the proto files locally.

# Note: Replace /cato/proto/path with your local path to the `cato/proto` directory.
protoc -I=your/project/proto/path -I=/cato/proto/path --cato_out=../ --cato_opt=ext_out_dir=../,swagger_path=swagger.json,api_host=localhost path/to/your/file.proto

• ext_out_dir: The base directory for Cato's generated files, which should be consistent with cato_out.
• swagger_path: If you need to generate OpenAPI documentation, specify the path for the swagger.json file.
• api_host: Specifies the host attribute in the swagger.json file.

Core Features:

• Using db.proto options to generate:
  • Database-related Table models.
  • Database Repo methods: Find, Delete, Insert, Update.
  • Implementation of relational database Rdb methods.
• Using http.proto options to generate:
  • HTTP API interface methods.
  • HTTP params definitions and parameter binding.
  • OpenAPI 2.0 interface documentation.
• Using struct.proto options to generate:
  • Structs with tags, typically used for generating BO (Business Objects).
  • Mapper methods for converting between different structs.

🎯 The Goal of Cato

Cato is committed to the long-term maintenance of stability and clarity in your Golang server-side projects. The name Cato is inspired by the game 《CATO: Butterered Cat》, whose core concept is "a cat always lands on its feet."

For Golang server-side projects, using Cato helps ensure your project always lands smoothly—maintaining stability and controllability while enabling the codebase to possess the flexibility and fluidity of a cat.

🛣️ Development Roadmap

We have many, many features, plans, and improvements yet to complete.

• Establish common packages to abstract foundational interfaces.
• Support DDL statement generation and DB Migrate.
• Support enum type generation.
• Optimize the generation method for Rdb and Repo.
• Optimize the global passing of the generator context.
• ...