🚀 WasmHub

Open-source WASM Hub of language runtimes

Download and manage WASM runtimes for Node.js, Python, Ruby, PHP, Go, and more - all in one place.

🎯 What is this?

A centralized, open-source repository providing versioned WASM language runtimes that can be:

• Downloaded once, cached forever
• Used in any Rust project as a library
• Accessed via CLI tool
• Fetched via CDN for browser usage

Think of it as: A package registry for WASM language runtimes (like npm, but for runtime binaries).

⚡ Quick Start

As a Library (Rust)

# Cargo.toml
[dependencies]
wasmhub = "0.1"

use wasmhub::{RuntimeLoader, Language};

#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
    let loader = RuntimeLoader::new();

    // Download Node.js v20.2.0 (auto-cached)
    let nodejs = loader.get_runtime(Language::NodeJs, "20.2.0").await?;

    println!("Runtime at: {}", nodejs.path.display());
    Ok(())
}

As a CLI Tool

# Install
cargo install wasmhub --features cli

# Download runtimes
wasmhub get nodejs@20.2.0
wasmhub get python@3.11.7

# List available
wasmhub list

# Show info
wasmhub info nodejs

Via CDN (Browser)

// Direct download
const url = 'https://cdn.jsdelivr.net/gh/anistark/wasmhub@latest/runtimes/nodejs/v20.2.0.wasm';
const response = await fetch(url);
const wasmBytes = await response.arrayBuffer();

🌟 Features

• ✅ Multi-language support - Node.js, Python, Ruby, PHP, Go, Rust
• ✅ Version management - Pin to specific versions
• ✅ Smart caching - Download once, use forever
• ✅ Type-safe API - Rust library with compile-time guarantees
• ✅ Fast downloads - Parallel, resumable transfers
• ✅ CDN distribution - Served via jsDelivr for browser access
• ✅ SHA256 verification - Integrity checks built-in
• ✅ Cross-platform - Works on Windows, macOS, Linux

📦 Available Runtimes

More languages coming soon! PRs welcome.

🚀 Use Cases

1. Browser-Based Development Environments

Build tools like StackBlitz/CodeSandbox without the proprietary runtime:

// Load Node.js in browser
let nodejs_wasm = loader.get_runtime(Language::NodeJs, "20.2.0").await?;
// Run user's project in WASM VM

2. Serverless Edge Functions

Deploy language runtimes to Cloudflare Workers, Deno Deploy, etc.:

wasmhub get python@3.11.7
# Deploy to edge with Python support

3. Testing Frameworks

Run tests in isolated WASM environments:

// Test with specific Node.js version
let node18 = loader.get_runtime(Language::NodeJs, "18.19.0").await?;
run_tests_with_runtime(node18)?;

4. Educational Platforms

Create online code editors with multiple language support:

// Student selects Python 3.12
const runtime = await fetchRuntime('python', '3.12.0');
executeCode(studentCode, runtime);

📖 Documentation

• API Documentation - Full Rust API reference
• Contributing Guide - Help build this project

🤝 Contributing

We welcome contributions! This project aims to be community-driven.

How to help:

• 🐛 Report bugs or request features via Issues
• 🔧 Submit PRs for new runtimes or improvements
• 📖 Improve documentation
• ⭐ Star the repo to show support

See CONTRIBUTING.md for guidelines.

🌐 Community & Support

• GitHub Discussions: Ask questions, share ideas
• Twitter: @anistark

📄 License

MIT License - see LICENSE for details.

🙏 Acknowledgments

This project builds upon the amazing work of:

• Pyodide - Python in WASM
• ruby.wasm - Ruby in WASM
• CodeSandbox - nodebox inspiration
• Wasmer - WASM runtime ecosystem

⚡ Why WASM Runtime?

The Problem: Language runtimes for WASM are scattered across different projects. Finding, downloading, and managing them is painful.

The Solution: A single, centralized repository with:

• ✅ Versioned runtimes for multiple languages
• ✅ Consistent APIs (Rust library + CLI)
• ✅ CDN distribution for browsers
• ✅ Smart caching and integrity verification
• ✅ Open-source and community-driven

Join us in making WASM runtimes accessible to everyone! 🚀

Made with ❤️ by Kumar Anirudha