🚀 bsdiff-rust

A high-performance binary differential patching library based on Rust and NAPI-RS, providing an optimized bsdiff/bspatch algorithm implementation for Node.js. Built on qbsdiff library with standard BSDIFF40 format support, featuring suffix array algorithms and parallel processing.

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✨ Core Features

• Standard Compatible: Generates standard BSDIFF40 format, fully compatible with bsdiff-node
• Memory Safe: Rust guarantees memory safety and thread safety, high-performance Node.js bindings via napi-rs
• Optimized Compression: Uses bzip2 compression with memory pre-allocation optimizations
• Cross-platform: Supports Windows, macOS, Linux

🚀 Quick Start

Installation

pnpm install @bsdiff-rust/node

Basic Usage

const bsdiff = require('@bsdiff-rust/node')

// Synchronous API
bsdiff.diffSync('old-file.zip', 'new-file.zip', 'patch.bin')
bsdiff.patchSync('old-file.zip', 'generated-file.zip', 'patch.bin')

// Asynchronous API
await bsdiff.diff('old-file.zip', 'new-file.zip', 'patch.bin')
await bsdiff.patch('old-file.zip', 'generated-file.zip', 'patch.bin')

TypeScript Support

import { diff, diffSync, patch, patchSync } from '@bsdiff-rust/node'

// Generate and apply patches
await diff('old-file.zip', 'new-file.zip', 'patch.bin')
await patch('old-file.zip', 'generated-file.zip', 'patch.bin')

Need performance monitoring or custom configuration? See Complete API Documentation

📖 API Documentation

Core API

// Synchronous methods
diffSync(oldFile: string, newFile: string, patchFile: string): void
patchSync(oldFile: string, newFile: string, patchFile: string): void

// Asynchronous methods
diff(oldFile: string, newFile: string, patchFile: string): Promise<void>
patch(oldFile: string, newFile: string, patchFile: string): Promise<void>

Need advanced features? See the Complete Guide for performance stats, configuration options, testing, and benchmarks.

🧪 Testing

# Run functional tests
pnpm test

# Run performance benchmarks
pnpm run bench

🔧 Development Guide

Environment Requirements

• Node.js: >= 16 (Latest LTS recommended)
• Rust: >= 1.70
• Package Manager: npm or pnpm

Building the Project

# Install dependencies
pnpm install

# Build release version
pnpm build

# Build debug version
pnpm build:debug

# Build for specific platform
pnpm build:arm64

Project Structure

bsdiff-rust/
├── src/
│   ├── lib.rs              # NAPI binding entry
│   ├── bsdiff_rust.rs      # Core Rust implementation
├── benchmark/
│   └── benchmark.ts        # TypeScript benchmarks
├── test/
│   ├── index.ts            # Functional tests
│   └── resources/          # Test resource files
├── index.js                # Node.js entry point
├── index.d.ts              # TypeScript type definitions
├── Cargo.toml              # Rust project configuration
└── package.json            # Node.js project configuration

🌍 Cross-platform Support

Supported Platforms

• macOS: ARM64 (Apple Silicon) and x64 (Intel)
• Linux: ARM64 and x64 (GNU and musl)
• Windows: ARM64 and x64 (MSVC)

Platform Package Strategy

This project uses napi-rs's multi-package strategy, automatically downloading precompiled binaries for the corresponding platform during installation:

npm/
├── @bsdiff-rust/darwin-arm64/     # macOS ARM64
├── @bsdiff-rust/darwin-x64/       # macOS x64
├── @bsdiff-rust/linux-arm64-gnu/  # Linux ARM64 glibc
├── @bsdiff-rust/linux-x64-gnu/    # Linux x64 glibc
├── @bsdiff-rust/linux-arm64-musl/ # Linux ARM64 musl
├── @bsdiff-rust/linux-x64-musl/   # Linux x64 musl
└── ...

Advantages:

• 🚀 Fast Installation: No compilation needed, direct download of precompiled binaries
• 📦 On-demand Download: Only downloads files needed for the current platform
• 🛡️ Stable and Reliable: Avoids installation failures due to compilation environment issues

🤝 Contributing

Development Process

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

Code Standards

• Rust Code: Use cargo fmt for formatting
• JavaScript/TypeScript: Use Prettier for formatting
• Commit Messages: Use clear English descriptions

📚 References

• Complete Guide - API reference, testing, and performance benchmarks
• bsdiff Original Algorithm - Colin Percival's original implementation
• NAPI-RS Documentation - Node.js binding framework
• qbsdiff Library - Underlying Rust implementation

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⭐ If this project helps you, please give it a star!

🐛 Found an issue? Feel free to submit an Issue

💡 Have suggestions for improvement? Welcome to submit a Pull Request