🧬 Hiigh Level Git Version Control (Java)

A simplified Java-based simulation of Git’s core functionality, including blobs, commits, trees, and a basic staging/index mechanism.

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📁 Repository Structure

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├── Blob.java              # Represents file contents
├── Commit.java            # Handles commit metadata and tree references
├── Tree.java              # Represents directory-like structure of blobs/trees
├── Index.java             # Tracks staged changes
├── GitTest.java           # Integration tests for Git simulation
├── *.Test.java            # Unit tests for core classes
├── PredictionScript.java  # (If present) handles future prediction logic
├── *.png                  # Visuals showing different commit states
├── .gitignore             # Ignore rules
├── README.md              # This file

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⚙️ Features

• 📦 Blobs: Store file content and generate SHA1 hashes.
• 🌲 Trees: Represent directories that hold blobs or other trees.
• 🧾 Commits: Store metadata (message, parent, timestamp) and point to a root tree.
• 🗃️ Index: Stage added/deleted files before commit.
• 🔁 Reconstruction: Rebuild prior versions from commit history.
• 📷 Visuals: PNG images demonstrate the state of the repository at different commit stages.
• 🧪 JUnit Tests: Comprehensive testing for Blobs, Commits, Trees, Indexes.

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🚀 Getting Started

1. Clone the repo:

   git clone https://github.com/<your-username>/<repo-name>.git

2. Compile the project:

   javac *.java

3. Run tests (using JUnit or your IDE):

   java org.junit.runner.JUnitCore CommitTest

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🧪 Testing

This project uses basic unit tests for each component:

• BlobTest.java
• CommitTest.java
• TreeTest.java
• IndexTest.java
• GitTest.java

Each test file validates the core logic and structure, ensuring correct SHA generation, file tracking, and commit reconstruction.

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🖼️ Visual Output

The following PNGs show commit evolution and structure:

• firstcommit.png
• secondcommit.png
• thirdcommit.png
• lastcommit.png

Each corresponds to a simulated snapshot of the repository.

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🙌 Acknowledgments

Project by dany1. Originally created to simulate low-level Git internals using pure Java.