Minecraft ModSync 🚀

A lightweight, pure Java synchronization tool designed to keep Minecraft modpacks up to date across a group of players. It automatically mirrors the server's mod directory on the client's side, deleting extra mods and downloading missing or outdated ones.

Features

• Zero Dependencies: Runs natively on pure Java. No external libraries are required.
• Secure by Design: Built-in protection against directory traversal attacks (uses strict memory mapping).
• Apt-like Progress Bar: Cool Linux-style terminal progress bar during downloads.
• Fast Hash Checking: Uses efficient MD5 chunking to verify file integrity instantly.

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🖥️ Server Setup (For the Host)

1. Create a folder for your update server and place the ModSyncServer.jar inside it.
2. In the same folder, create a configuration file named modsync.conf with the following content:

PORT=12345
MOD_DIR=C:/path/to/your/server/mods

3. Open your terminal in that folder and run the server:

java -jar ModSyncServer.jar

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🎮 Client Setup (For Players)

1. Create a folder anywhere on your computer and place the ModSync.jar inside it.
2. In the same folder, create a configuration file named modsync.conf with the following content:

SERVER_IP=SERVER_IP_HERE
PORT=12345
MOD_DIR=C:/Users/YOUR_USER/AppData/Roaming/.minecraft/mods

(Make sure to replace SERVER_IP_HERE with the host's IP address and fix the path to your .minecraft/mods folder if needed).

3. Run the sync tool via the terminal:

java -jar ModSync.jar

4. Once the progress bar reaches 100%, you are ready to open Minecraft and play!