Jelly

A simplified package manager for Java and Groovy applications, inspired by npm, poetry, and cargo.

Vision

Jelly aims to make dependency management more accessible for developers coming from other ecosystems (Python, JavaScript, Rust) who find Maven and Gradle complex for getting started.

• Simplicity: Provide an npm-like experience for Java/Groovy development
• Accessibility: Lower the barrier to entry for new Java developers
• Familiarity: Use patterns familiar to developers from other language ecosystems
• Integration: Work with existing Maven infrastructure while abstracting complexity

Current Status

Development Phase 1 - Foundation ✅ CLI Structure Implemented

✅ Completed Features

• Modern CLI Interface with crossterm styling
• Project Initialization - jelly init command
• Clean Architecture foundation with proper error handling
• TOML Configuration parsing and generation

🔄 In Progress

• Core dependency resolution engine
• Maven repository integration
• Artifact downloading and installation

📋 Planned Features

• jelly add <dependency> - Add dependencies
• jelly install - Download and install all dependencies
• jelly run [script] - Execute project scripts
• Lock file support (jelly.lock)
• Development vs production dependencies

Quick Start

Installation

cargo build --release

Initialize a New Project

jelly init my-java-app

This creates:

• jelly.toml - Project configuration file
• libs/ - Directory for downloaded dependencies

Example jelly.toml

[package]
name = "my-jdk-app"
version = "1.0.0"
main-class = "com.example.Main"

[dependencies]
"org.springframework:spring-core" = "6.0.0"
"junit:junit" = "4.13.2"

[scripts]
start = "java -cp 'libs/*' ${main-class}"
test = "java -cp 'libs/*:.' org.junit.runner.JUnitCore"

Development

Prerequisites

• Rust 1.70+
• Java 8+ (for testing)

Build Commands

# Build the project
cargo build

# Run with arguments
cargo run -- init my-project

# Run tests
cargo test

# Check code
cargo check

# Lint code
cargo clippy

Contributing

1. Fork the repository
2. Create a feature branch
3. Make your changes following the existing architecture
4. Add tests for new functionality
5. Submit a pull request

License

This project is open source and available under the MIT License.

Inspiration

Jelly takes inspiration from modern package managers:

• npm (Node.js) - Simple configuration and commands
• poetry (Python) - Elegant dependency management
• cargo (Rust) - Straightforward project structure

But designed specifically for the Java/Groovy ecosystem while maintaining compatibility with Maven repositories.