MyGit - A Custom Git-Like Version Control System

MyGit is a lightweight, custom version control system built using Node.js. It tracks file changes using Merkle Trees, ensuring efficient comparison of file states across commits.

🚀 Features

• Initialize a Repository: Create a .mygit/ directory with necessary metadata.
• Track File Changes: Add files to the index and detect modifications.
• Commit Changes: Store file states and maintain a version history.
• Efficient Change Detection: Uses Merkle Trees to compare commits quickly.
• Checkout Commits: Restore previous file versions.
• Compare Commits: Determine whether changes exist between commits.
• Show Status: List modified, new, and deleted files.

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📌 Installation

# Clone this repository
git clone https://github.com/yourusername/mygit.git
cd mygit

# Install dependencies
npm install

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📖 Usage

1️⃣ Initialize MyGit Repository

const git = new MyGit();

This creates the .mygit/ directory with necessary folders and files.

2️⃣ Add Files to Staging Area

git.add("./sample/file1.txt");

This stores a hashed version of the file in .mygit/objects/.

3️⃣ Check Status

git.status();

Outputs:

🔍 Status:
🆕 New: ["file.txt"]
✅ No changes detected!

4️⃣ Commit Changes

git.commit("Initial commit");

Outputs:

Committed as d1a2b3c4 (Merkle Root: a1b2c3d4e5)

5️⃣ Compare Commits

git.compareCommits(<hash1>, <hash2>);```

Outputs:

Comparing d1a2b3c4 ↔ e5f6g7h8 ❌ Changes detected! (Merkle roots differ)

### 6️⃣ Checkout a Commit

```sh
git.checkout(<commit_hash>)

This restores files from a previous commit.

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⚡ How MyGit Works

1. Adding Files:

   • Hashes the file content and stores it in .mygit/objects/.
   • Updates the .mygit/index file to track the latest version.

2. Committing Changes:

   • Builds a Merkle Tree using file hashes.
   • Saves commit metadata in .mygit/commits/.
   • Updates .mygit/branches/main.json with the latest commit.

3. Comparing Commits:

   • Retrieves Merkle roots of both commits.
   • If the roots match, no changes are detected.
   • If they differ, specific files are identified as changed.

4. Checking Out a Commit:

   • Reads commit data and restores the files.

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🛠 Technologies Used

• Node.js - Core runtime
• File System (fs) - Handling file operations
• Crypto - Hashing file contents for integrity
• Merkle Trees - Efficient change tracking

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🎯 Future Enhancements

• ✅ Implement branching
• ✅ Support remote repositories
• ✅ Improve CLI interface with better UX

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📝 License

This project is licensed under the MIT License.

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👨‍💻 Developed by Your Name

📌 Version Control Simplified!