Minimal Git Implementation

This Python program implements basic Git functionalities to explore Git objects, trees, and repositories. It provides commands for initializing a Git directory, listing tree contents, hashing objects, and more.

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Features

• Initialize a Git Repository: Set up a minimal .git directory structure.
• Hash a File: Compute and optionally write the hash of a file in Git's object storage.
• Inspect Git Objects: Read and display the content of a blob or tree object.
• List Tree Contents: Show the entries in a tree object.

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Commands and Usage

1. Initialize a Repository

python script.py init

Creates a minimal .git directory structure:

• .git/objects
• .git/refs
• .git/HEAD pointing to refs/heads/main.

2. Hash a File

python script.py hash-object [-w] <file_path>

• Compute the SHA-1 hash of the file's content.
• Optionally write the file into the .git/objects directory with the -w flag.

Examples:

• Compute hash only:

  python script.py hash-object file.txt

• Compute hash and write:

  python script.py hash-object -w file.txt

3. Inspect an Object

python script.py cat-file -p <object_sha>

• Display the content of a Git object (blob, tree, etc.).
• The object is identified by its SHA.

4. List Tree Contents

python script.py ls-tree [--name-only] <tree_sha>

• List the contents of a tree object.
• The --name-only flag lists only entry names without additional details.

Examples:

• Full details:

  python script.py ls-tree <tree_sha>

• Names only:

  python script.py ls-tree --name-only <tree_sha>

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Requirements

• Python 3.x

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Notes

• The program assumes a Git-like .git directory structure for file-based operations.
• Make sure you have a valid .git directory in the working directory for commands that interact with objects.

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Limitations

This implementation is a simplified version of Git and supports only core features:

• It does not handle branches, commits, or advanced Git concepts.
• The program operates on objects and trees manually, without the full Git plumbing.

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License

This project is open-source and available for educational purposes. Modify and adapt as needed!

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Author

Created by [Hanafe Mira].