git/init-db.c

/*
 * GIT - The information manager from hell
 *
 * Copyright (C) Linus Torvalds, 2005
 */
#include "cache.h"

int main(int argc, char **argv)
{
	char *sha1_dir, *path;
	int len, i;

	if (mkdir(".git", 0755) < 0) {
		perror("unable to create .git directory");
		exit(1);
	}

	/*
	 * If you want to, you can share the DB area with any number of branches.
	 * That has advantages: you can save space by sharing all the SHA1 objects.
	 * On the other hand, it might just make lookup slower and messier. You
	 * be the judge.
	 */
	sha1_dir = getenv(DB_ENVIRONMENT);
	if (sha1_dir) {
		struct stat st;
		if (!stat(sha1_dir, &st) && S_ISDIR(st.st_mode))
			return 0;
		fprintf(stderr, "DB_ENVIRONMENT set to bad directory %s: ", sha1_dir);
	}

	/*
	 * The default case is to have a DB per managed directory.
	 */
	sha1_dir = DEFAULT_DB_ENVIRONMENT;
	fprintf(stderr, "defaulting to private storage area\n");
	len = strlen(sha1_dir);
	if (mkdir(sha1_dir, 0755) < 0) {
		if (errno != EEXIST) {
			perror(sha1_dir);
			exit(1);
		}
	}
	path = malloc(len + 40);
	memcpy(path, sha1_dir, len);
	for (i = 0; i < 256; i++) {
		sprintf(path+len, "/%02x", i);
		if (mkdir(path, 0755) < 0) {
			if (errno != EEXIST) {
				perror(path);
				exit(1);
			}
		}
	}
	return 0;
}