goon

Go implementation of the TOON data format.

goon is a high-performance, strictly compliant Go library and CLI for parsing and generating TOON (The Object-Oriented Notation) data.

Features

• 🚀 Fast & Efficient: Built with performance in mind using a custom scanner and recursive descent parser.
• 🔄 Marshal/Unmarshal: Direct conversion between Go structs and TOON format with struct tag support (like encoding/json).
• 🔒 Strict Mode: Optional strict validation to ensure your TOON files are perfectly formatted (no tabs, correct indentation).
• 🛠️ CLI Tools: Includes goon encode and goon decode for easy integration into existing workflows.
• 📦 Zero Dependencies: The core library has no external dependencies.

Installation

Quick Install (Script)

Linux & macOS

curl -fsSL https://raw.githubusercontent.com/tnfssc/goon/develop/scripts/install.sh | sh

Windows (PowerShell)

irm https://raw.githubusercontent.com/tnfssc/goon/develop/scripts/install.ps1 | iex

Manual Installation

Library

To use Goon in your Go project:

go get github.com/tnfssc/goon

CLI Tools

To install the command-line tool:

go install github.com/tnfssc/goon/cmd/goon@latest

Usage

Library

package main

import (
	"fmt"
	"log"

	"github.com/tnfssc/goon/pkg/toon"
)

type Config struct {
	Name     string   `toon:"name"`
	Version  string   `toon:"version"`
	Features []string `toon:"features"`
}

func main() {
	// Marshal Go struct to TOON (like json.Marshal)
	config := Config{
		Name:     "MyApp",
		Version:  "1.0.0",
		Features: []string{"fast", "reliable", "simple"},
	}

	toonData, err := toon.Marshal(config, toon.EncodeOptions{IndentSize: 2})
	if err != nil {
		log.Fatal(err)
	}
	fmt.Println(string(toonData))

	// Unmarshal TOON to Go struct (like json.Unmarshal)
	var decoded Config
	err = toon.Unmarshal(toonData, &decoded, toon.DecodeOptions{IndentSize: 2})
	if err != nil {
		log.Fatal(err)
	}
	fmt.Printf("Decoded: %+v\n", decoded)
}

CLI

Convert JSON to TOON:

goon encode input.json > output.toon

Convert TOON back to JSON:

goon decode input.toon > output.json

Pipe from stdin:

# JSON to TOON
cat data.json | goon encode > data.toon

# TOON to JSON
cat config.toon | goon decode > config.json

# Chain with other tools
curl https://api.example.com/data.json | goon encode > api-data.toon

TOON Syntax Support

Goon supports the full TOON specification, including:

• Key-Value Pairs: Simple key: value syntax.
• Nested Objects: Indentation-based hierarchy.
• Arrays:
  • List format: key: [length|] followed by - item lines.
  • Coming Soon: Inline arrays and tabular arrays.
• Primitives: Strings, numbers, booleans, and null.

Contributing

Contributions are welcome! Please feel free to submit a Pull Request.

1. Fork the repository
2. Create your feature branch (git checkout -b feature/amazing-feature)
3. Commit your changes (git commit -m 'Add some amazing feature')
4. Push to the branch (git push origin feature/amazing-feature)
5. Open a Pull Request

License

This project is licensed under the MIT License - see the LICENSE.md file for details.