A lightweight, systems-level Version Control System written in C++17. Reconstructs Git’s object database, Merkle DAG tracking, and binary index parsing from the ground up using Object-Oriented Programming (OOP) principles.

Features

• Cryptographic Hashing: Native SHA-1 integration and zlib blob compression.
• Binary Index Parsing: Optimized .git/index staging area parser with strict Endianness (byte-order) management.
• POSIX Integration: Nanosecond-precision status diffing utilizing <sys/stat.h>.
• Merkle DAG Generation: Recursive tree building and traversal algorithms to manage repository history.

Supported Commands

The engine successfully mimics the following core Git sub-commands:

• Plumbing: hash-object, cat-file, ls-tree, ls-files, check-ignore, rev-parse, show-ref
• Porcelain: init, add, rm, commit, status, log, checkout, tag

Build & Run (macOS)

Prerequisites

• C++17 Compatible Compiler (clang++)
• zlib library (natively available on macOS)
• macOS Native CommonCrypto (for SHA-1)

Compilation

Build the executable using the following command:

clang++ -std=c++17 main.cpp libwyag.cpp -o wyag -lz

Quick Start

Bash
# Initialize a new repository
./wyag init

# Create and stage a file
echo "Hello GitCore" > readme.txt
./wyag add readme.txt

# Commit the changes
./wyag commit -m "Initial commit"

# Check the history
./wyag log HEAD

Acknowledgements This C++ adaptation was built following the excellent foundational concepts outlined in the tutorial: Write Yourself a Git by Thibault Polge. Link : https://wyag.thb.lt/#getting-started