hash_object.cpp File Reference

#include "blob.hpp"
#include <filesystem>
#include <format>
#include <fstream>
#include <iostream>
#include "sha.hpp"
#include <string>
#include <unistd.h>
#include <zstr.hpp>

Include dependency graph for hash_object.cpp:

Functions
int	store_file_as_blob (const std::string &path, const std::string &sha1)
	Stores a file as a blob object in the repository.
int	hash_object (int argc, char *argv[])

Variables
int	opterr
int	optind
int	optopt
char *	optarg

Function Documentation

hash_object()

int hash_object	(	int	argc,
		char *	argv[] )

store_file_as_blob()

int store_file_as_blob	(	const std::string &	path,
		const std::string &	sha1 )

Stores a file as a blob object in the repository.

Each Git Blob is stored as a separate file in the .git/objects directory. The file contains a header and the contents of the blob object, compressed using Zlib.

The format of a blob object file looks like this (after Zlib decompression):

blob <size>\0<content>

• <size> is the size of the content (in bytes)
• \0 is a null byte
• <content> is the actual content of the file

For example, if the contents of a file are hello world, the blob object file would look like this (after Zlib decompression):

blob 11\0hello world

Parameters

path	Path to the file
sha1	Precomputed SHA-1 hash of the file contents (to avoid recomputing it)

Returns

EXIT_SUCCESS on success, EXIT_FAILURE on failure

Variable Documentation

optarg

char* optarg

extern

opterr

int opterr

extern

optind

int optind

extern

optopt

int optopt

extern