CyberPatchMaker

Update your software smarter, not harder.

CyberPatchMaker creates tiny update files for large applications. Instead of downloading a whole 5GB app again, download just a few megabytes of changes.

Why Use CyberPatchMaker?

Imagine you have a 5GB application. You make some small changes and release version 1.0.1. Without CyberPatchMaker, users download the entire 5GB again. With CyberPatchMaker, they download only a few MB patch file that contains just the changes.

Real-world example:

• Version 1.0.0: 5GB application
• Version 1.0.1: 5GB application (only a few files changed)
• Traditional update: Download 5GB again
• With CyberPatchMaker: Download 5MB patch file

Perfect for:

• Game developers releasing updates
• Software companies with large applications
• Anyone who wants to save bandwidth and user time

Key Features

• Safe & Reliable - Automatic verification and rollback if anything goes wrong
• Efficient - Smart compression reduces patch sizes by ~60%
• Bidirectional - Generate both upgrade and downgrade patches for version flexibility
• Cross-Platform - Works on Windows, macOS, and Linux
• Developer-Friendly - Simple command-line tools
• Production-Ready - Built-in backup and recovery systems
• Self-Contained Executables - Create standalone .exe files for easy end-user distribution
• Smart File Exclusion - Use .cyberignore to exclude sensitive files and reduce patch size
• Scan Caching - Cache directory scans for instant patch generation (15+ min → <1 sec for large projects)
• Simple Mode for End Users - Simplified interface for non-technical users with basic options
• Silent Mode - Fully automatic patching with zero user interaction, automatic log file generation (CLI only)
• Large File Handling - Automatic memory-optimized processing for files >1GB, prevents memory exhaustion
• Multi-Part Patches - Automatic splitting of patches >4GB into manageable parts (prevents memory exhaustion with 18GB+ patches)
• Parallel Processing - Multi-threaded patch generation using multiple CPU cores for faster processing
• Advanced Compression - Multiple compression algorithms (zstd, gzip) with configurable levels

Quick Start

Installation

Requirements: Go 1.24.0 or later

# Clone and build
git clone https://github.com/cyberofficial/CyberPatchMaker.git
cd CyberPatchMaker
go build -o patch-gen ./cmd/generator
go build -o patch-apply ./cmd/applier

Detailed setup: See Development Setup Guide

Basic Usage

Creating a Patch

Generate patches for a new version of your software:

patch-gen --versions-dir ./versions --new-version 1.0.3 --output ./patches

This automatically creates patch files from all previous versions to version 1.0.3.

Applying a Patch

Update your application with a patch file:

# Test first (dry-run)
patch-apply --patch ./patches/1.0.0-to-1.0.3.patch --current-dir ./app --dry-run

# Apply the update
patch-apply --patch ./patches/1.0.0-to-1.0.3.patch --current-dir ./app --verify

The --verify flag ensures everything is checked before and after patching, with automatic rollback if anything goes wrong.

More examples and options:

• Generator Guide - All patch creation options
• Applier Guide - All patch application options
• CLI Reference - Complete command reference
• CLI Examples - Common usage patterns
• Downgrade Guide - Rollback to previous versions
• Multi-Part Patches - Handling patches >4GB (automatic splitting)

Advanced Options

CyberPatchMaker includes several advanced CLI flags for performance optimization and specialized use cases:

Scan Caching (--savescans, --scandata, --rescan)

Cache directory scans to dramatically speed up subsequent patch generations:

# First generation: Enable caching
patch-gen --versions-dir ./versions --new-version 1.0.3 --output ./patches --savescans

# Subsequent generations: Load from cache (instant)
patch-gen --versions-dir ./versions --new-version 1.0.4 --output ./patches --savescans

# Custom cache location
patch-gen --versions-dir ./versions --new-version 1.0.3 --output ./patches --savescans --scandata ./shared-cache

# Force rescan when files have changed
patch-gen --versions-dir ./versions --new-version 1.0.3 --output ./patches --savescans --rescan

Benefits:

• Large projects: 15+ minute scan → <1 second cache load
• Validates key file hash to prevent stale data usage
• Works with all patch generation modes

Parallel Processing (--jobs)

Use multiple CPU cores for faster patch generation:

# Auto-detect CPU cores (default)
patch-gen --versions-dir ./versions --new-version 1.0.3 --output ./patches

# Use 4 cores explicitly
patch-gen --versions-dir ./versions --new-version 1.0.3 --output ./patches --jobs 4

# Single-threaded for debugging
patch-gen --versions-dir ./versions --new-version 1.0.3 --output ./patches --jobs 1

Benefits:

• Faster processing on multi-core systems
• Automatic CPU detection (0 = auto-detect)
• Significant speedup for large projects

Multi-Part Split Size (--splitsize, --bypasssplitlimit)

Control how large patches are split into manageable parts:

# Custom 2GB split size
patch-gen --from-dir ./v1 --to-dir ./v2 --output ./patches --splitsize 2G

# Small split size (requires confirmation bypass)
patch-gen --from-dir ./v1 --to-dir ./v2 --output ./patches --splitsize 50M --bypasssplitlimit

Benefits:

• Prevents memory exhaustion with very large patches
• Default 4GB splits, customizable
• Automatic part reassembly during application

Excluding Files with .cyberignore

Control which files are included in patches using a .cyberignore file (similar to .gitignore):

:: Place in your version directory
:: Lines starting with :: are comments

:: Ignore sensitive files
*.key
*.crt
config/secrets.json

:: Ignore logs and temporary files
*.log
*.tmp
logs/

:: Ignore user data
saves/
user_config.json

:: Exclude files from external directories (absolute paths)
E:\temp\build\*.log
C:\shared\cache\*

The generator automatically excludes matching files from patches. Perfect for keeping API keys, certificates, and user data out of updates!

Complete guide: .cyberignore File Guide

Downgrade Patches (Rolling Back)

Need to rollback to a previous version? CyberPatchMaker supports bidirectional patches:

# Generate downgrade patch
patch-gen --from 1.0.3 --to 1.0.2 --versions-dir ./versions --output ./patches/downgrade

# Apply downgrade to rollback
patch-apply --patch ./patches/downgrade/1.0.3-to-1.0.2.patch --current-dir ./app --verify

This allows users to safely revert to an earlier version if needed.

Complete downgrade documentation: Downgrade Guide

How It Works (Simple Version)

CyberPatchMaker compares two versions of your software and creates a small patch file containing only the differences. When users apply the patch, it safely updates their installation with built-in verification and rollback protection.

The process:

1. Generate: Compare old version with new version → Create small patch file
2. Distribute: Share the tiny patch file instead of the full application
3. Apply: Users run the patch → Their software updates safely

Safety features:

• Verifies files before patching (catches corruption early)
• Creates automatic backup
• Verifies files after patching
• Automatic rollback if anything fails

Want technical details?

• How It Works - Deep dive into the internals
• Architecture - System design and components
• Hash Verification - Security and verification
• Key File System - Version identification
• Backup Lifecycle - Backup and recovery process
• Backup System - Comprehensive backup management
• Version Management - How versions are tracked

Complete Example

Here's a typical workflow from start to finish:

# 1. You have a new version ready
mkdir versions/1.0.2
# (copy your new version files into versions/1.0.2/)

# 2. Generate patch files
patch-gen --versions-dir ./versions --new-version 1.0.2 --output ./patches
# Creates: patches/1.0.0-to-1.0.2.patch
#          patches/1.0.1-to-1.0.2.patch

# 3. Distribute patch files to users
# (upload to your website, CDN, etc.)

# 4. Users test the patch first (optional but recommended)
patch-apply --patch 1.0.0-to-1.0.2.patch --current-dir ./myapp --dry-run

# 5. Users apply the patch
patch-apply --patch 1.0.0-to-1.0.2.patch --current-dir ./myapp --verify
# Done! Their version 1.0.0 is now version 1.0.2

More examples: CLI Examples

What's Included

Production-Ready CLI Tools:

• Patch Generator (patch-gen.exe / patch-gen) - Create update files
• Patch Applier (patch-apply.exe / patch-apply) - Install updates
• Comprehensive verification and automatic rollback
• Tested with complex directory structures
• Handles files from 1KB to 20GB+ with automatic memory optimization
• Multiple compression formats (zstd, gzip)

Documentation: Full Documentation Index

Testing

Want to verify everything works? Run the test suite:

# Windows PowerShell
.\advanced-test.ps1

The test suite automatically validates:

• Patch generation and application
• Multiple compression formats
• Wrong version detection
• File corruption detection
• Backup and rollback systems
• Complex directory structures

Testing documentation:

• Testing Guide - How to test your patches
• Advanced Test Summary - Detailed test results

Performance & Reliability

Fast:

• Generate patches for 5GB apps in under 5 minutes
• Apply patches in under 3 minutes
• Low memory usage (< 500MB)

Small:

• Typical patches are < 5% of full app size
• Smart compression reduces size by ~60%

Safe:

• Every file verified before and after patching
• Automatic backup and rollback
• Prevents applying wrong patches

Technical details:

• Architecture - System design
• Compression Guide - Compression options
• Version Management - How versions are tracked

Documentation

All documentation is in the docs/ folder:

Getting Started:

• Quick Start - Get up and running fast
• CLI Examples - Common usage patterns
• Development Setup - Developer guide

Reference:

• Generator Guide - Creating patches
• Applier Guide - Applying patches
• Self-Contained Executables - Standalone patch distribution
• CLI Reference - All commands and options
• Simple Mode Guide - Simplified interface for end users

Advanced:

• How It Works - Technical deep dive
• Architecture - System design
• Testing Guide - Testing your patches
• Troubleshooting - Common issues
• Advanced Test Summary - Detailed test results
• Large File Handling - Memory optimization for large files
• Backup System - Comprehensive backup management
• Key File System - Version identification
• Version Management - How versions are tracked
• Compression Guide - Compression options
• Hash Verification - Security and verification
• Backup Lifecycle - Backup and recovery process
• Multi-Part Patches - Handling large patches
• Cyberignore Guide - File exclusion patterns

Contributing

Contributions are welcome! Please feel free to submit issues and pull requests.

License

See LICENSE file for details.

Author

Created by CyberOfficial

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