[thirdparty/git.git] / builtin-init-db.c

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

#ifndef DEFAULT_GIT_TEMPLATE_DIR
#define DEFAULT_GIT_TEMPLATE_DIR "/usr/share/git-core/templates"
#endif

#ifdef NO_TRUSTABLE_FILEMODE
#define TEST_FILEMODE 0
#else
#define TEST_FILEMODE 1
#endif

static void safe_create_dir(const char *dir, int share)
{
	if (mkdir(dir, 0777) < 0) {
		if (errno != EEXIST) {
			perror(dir);
			exit(1);
		}
	}
	else if (share && adjust_shared_perm(dir))
		die("Could not make %s writable by group\n", dir);
}

static int copy_file(const char *dst, const char *src, int mode)
{
	int fdi, fdo, status;

	mode = (mode & 0111) ? 0777 : 0666;
	if ((fdi = open(src, O_RDONLY)) < 0)
		return fdi;
	if ((fdo = open(dst, O_WRONLY | O_CREAT | O_EXCL, mode)) < 0) {
		close(fdi);
		return fdo;
	}
	status = copy_fd(fdi, fdo);
	if (close(fdo) != 0)
		return error("%s: write error: %s", dst, strerror(errno));

	if (!status && adjust_shared_perm(dst))
		return -1;

	return status;
}

static void copy_templates_1(char *path, int baselen,
			     char *template, int template_baselen,
			     DIR *dir)
{
	struct dirent *de;

	/* Note: if ".git/hooks" file exists in the repository being
	 * re-initialized, /etc/core-git/templates/hooks/update would
	 * cause git-init to fail here.  I think this is sane but
	 * it means that the set of templates we ship by default, along
	 * with the way the namespace under .git/ is organized, should
	 * be really carefully chosen.
	 */
	safe_create_dir(path, 1);
	while ((de = readdir(dir)) != NULL) {
		struct stat st_git, st_template;
		int namelen;
		int exists = 0;

		if (de->d_name[0] == '.')
			continue;
		namelen = strlen(de->d_name);
		if ((PATH_MAX <= baselen + namelen) ||
		    (PATH_MAX <= template_baselen + namelen))
			die("insanely long template name %s", de->d_name);
		memcpy(path + baselen, de->d_name, namelen+1);
		memcpy(template + template_baselen, de->d_name, namelen+1);
		if (lstat(path, &st_git)) {
			if (errno != ENOENT)
				die("cannot stat %s", path);
		}
		else
			exists = 1;

		if (lstat(template, &st_template))
			die("cannot stat template %s", template);

		if (S_ISDIR(st_template.st_mode)) {
			DIR *subdir = opendir(template);
			int baselen_sub = baselen + namelen;
			int template_baselen_sub = template_baselen + namelen;
			if (!subdir)
				die("cannot opendir %s", template);
			path[baselen_sub++] =
				template[template_baselen_sub++] = '/';
			path[baselen_sub] =
				template[template_baselen_sub] = 0;
			copy_templates_1(path, baselen_sub,
					 template, template_baselen_sub,
					 subdir);
			closedir(subdir);
		}
		else if (exists)
			continue;
		else if (S_ISLNK(st_template.st_mode)) {
			char lnk[256];
			int len;
			len = readlink(template, lnk, sizeof(lnk));
			if (len < 0)
				die("cannot readlink %s", template);
			if (sizeof(lnk) <= len)
				die("insanely long symlink %s", template);
			lnk[len] = 0;
			if (symlink(lnk, path))
				die("cannot symlink %s %s", lnk, path);
		}
		else if (S_ISREG(st_template.st_mode)) {
			if (copy_file(path, template, st_template.st_mode))
				die("cannot copy %s to %s", template, path);
		}
		else
			error("ignoring template %s", template);
	}
}

static void copy_templates(const char *git_dir, int len, const char *template_dir)
{
	char path[PATH_MAX];
	char template_path[PATH_MAX];
	int template_len;
	DIR *dir;

	if (!template_dir) {
		template_dir = getenv(TEMPLATE_DIR_ENVIRONMENT);
		if (!template_dir)
			template_dir = DEFAULT_GIT_TEMPLATE_DIR;
	}
	strcpy(template_path, template_dir);
	template_len = strlen(template_path);
	if (template_path[template_len-1] != '/') {
		template_path[template_len++] = '/';
		template_path[template_len] = 0;
	}
	dir = opendir(template_path);
	if (!dir) {
		fprintf(stderr, "warning: templates not found %s\n",
			template_dir);
		return;
	}

	/* Make sure that template is from the correct vintage */
	strcpy(template_path + template_len, "config");
	repository_format_version = 0;
	git_config_from_file(check_repository_format_version,
			     template_path);
	template_path[template_len] = 0;

	if (repository_format_version &&
	    repository_format_version != GIT_REPO_VERSION) {
		fprintf(stderr, "warning: not copying templates of "
			"a wrong format version %d from '%s'\n",
			repository_format_version,
			template_dir);
		closedir(dir);
		return;
	}

	memcpy(path, git_dir, len);
	path[len] = 0;
	copy_templates_1(path, len,
			 template_path, template_len,
			 dir);
	closedir(dir);
}

static int create_default_files(const char *git_dir, const char *template_path)
{
	unsigned len = strlen(git_dir);
	static char path[PATH_MAX];
	unsigned char sha1[20];
	struct stat st1;
	char repo_version_string[10];
	int reinit;
	int filemode;

	if (len > sizeof(path)-50)
		die("insane git directory %s", git_dir);
	memcpy(path, git_dir, len);

	if (len && path[len-1] != '/')
		path[len++] = '/';

	/*
	 * Create .git/refs/{heads,tags}
	 */
	strcpy(path + len, "refs");
	safe_create_dir(path, 1);
	strcpy(path + len, "refs/heads");
	safe_create_dir(path, 1);
	strcpy(path + len, "refs/tags");
	safe_create_dir(path, 1);

	/* First copy the templates -- we might have the default
	 * config file there, in which case we would want to read
	 * from it after installing.
	 */
	path[len] = 0;
	copy_templates(path, len, template_path);

	git_config(git_default_config);

	/*
	 * We would have created the above under user's umask -- under
	 * shared-repository settings, we would need to fix them up.
	 */
	if (shared_repository) {
		path[len] = 0;
		adjust_shared_perm(path);
		strcpy(path + len, "refs");
		adjust_shared_perm(path);
		strcpy(path + len, "refs/heads");
		adjust_shared_perm(path);
		strcpy(path + len, "refs/tags");
		adjust_shared_perm(path);
	}

	/*
	 * Create the default symlink from ".git/HEAD" to the "master"
	 * branch, if it does not exist yet.
	 */
	strcpy(path + len, "HEAD");
	reinit = !read_ref("HEAD", sha1);
	if (!reinit) {
		if (create_symref("HEAD", "refs/heads/master", NULL) < 0)
			exit(1);
	}

	/* This forces creation of new config file */
	sprintf(repo_version_string, "%d", GIT_REPO_VERSION);
	git_config_set("core.repositoryformatversion", repo_version_string);

	path[len] = 0;
	strcpy(path + len, "config");

	/* Check filemode trustability */
	filemode = TEST_FILEMODE;
	if (TEST_FILEMODE && !lstat(path, &st1)) {
		struct stat st2;
		filemode = (!chmod(path, st1.st_mode ^ S_IXUSR) &&
				!lstat(path, &st2) &&
				st1.st_mode != st2.st_mode);
	}
	git_config_set("core.filemode", filemode ? "true" : "false");

	if (is_bare_repository())
		git_config_set("core.bare", "true");
	else {
		const char *work_tree = get_git_work_tree();
		git_config_set("core.bare", "false");
		/* allow template config file to override the default */
		if (log_all_ref_updates == -1)
		    git_config_set("core.logallrefupdates", "true");
		if (work_tree != git_work_tree_cfg)
			git_config_set("core.worktree", work_tree);
	}
	return reinit;
}

static void guess_repository_type(const char *git_dir)
{
	char cwd[PATH_MAX];
	const char *slash;

	if (0 <= is_bare_repository_cfg)
		return;
	if (!git_dir)
		return;

	/*
	 * "GIT_DIR=. git init" is always bare.
	 * "GIT_DIR=`pwd` git init" too.
	 */
	if (!strcmp(".", git_dir))
		goto force_bare;
	if (!getcwd(cwd, sizeof(cwd)))
		die("cannot tell cwd");
	if (!strcmp(git_dir, cwd))
		goto force_bare;
	/*
	 * "GIT_DIR=.git or GIT_DIR=something/.git is usually not.
	 */
	if (!strcmp(git_dir, ".git"))
		return;
	slash = strrchr(git_dir, '/');
	if (slash && !strcmp(slash, "/.git"))
		return;

	/*
	 * Otherwise it is often bare.  At this point
	 * we are just guessing.
	 */
 force_bare:
	is_bare_repository_cfg = 1;
	return;
}

static const char init_db_usage[] =
"git-init [-q | --quiet] [--template=<template-directory>] [--shared]";

/*
 * 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.  The default case is to have one DB per managed directory.
 */
int cmd_init_db(int argc, const char **argv, const char *prefix)
{
	const char *git_dir;
	const char *sha1_dir;
	const char *template_dir = NULL;
	char *path;
	int len, i, reinit;
	int quiet = 0;

	for (i = 1; i < argc; i++, argv++) {
		const char *arg = argv[1];
		if (!prefixcmp(arg, "--template="))
			template_dir = arg+11;
		else if (!strcmp(arg, "--shared"))
			shared_repository = PERM_GROUP;
		else if (!prefixcmp(arg, "--shared="))
			shared_repository = git_config_perm("arg", arg+9);
		else if (!strcmp(arg, "-q") || !strcmp(arg, "--quiet"))
		        quiet = 1;
		else
			usage(init_db_usage);
	}

	/*
	 * GIT_WORK_TREE makes sense only in conjunction with GIT_DIR
	 * without --bare.  Catch the error early.
	 */
	git_dir = getenv(GIT_DIR_ENVIRONMENT);
	if ((!git_dir || is_bare_repository_cfg == 1)
	    && getenv(GIT_WORK_TREE_ENVIRONMENT))
		die("%s (or --work-tree=<directory>) not allowed without "
		    "specifying %s (or --git-dir=<directory>)",
		    GIT_WORK_TREE_ENVIRONMENT,
		    GIT_DIR_ENVIRONMENT);

	guess_repository_type(git_dir);

	if (is_bare_repository_cfg <= 0) {
		git_work_tree_cfg = xcalloc(PATH_MAX, 1);
		if (!getcwd(git_work_tree_cfg, PATH_MAX))
			die ("Cannot access current working directory.");
		if (access(get_git_work_tree(), X_OK))
			die ("Cannot access work tree '%s'",
			     get_git_work_tree());
	}

	/*
	 * Set up the default .git directory contents
	 */
	git_dir = getenv(GIT_DIR_ENVIRONMENT);
	if (!git_dir)
		git_dir = DEFAULT_GIT_DIR_ENVIRONMENT;
	safe_create_dir(git_dir, 0);

	/* Check to see if the repository version is right.
	 * Note that a newly created repository does not have
	 * config file, so this will not fail.  What we are catching
	 * is an attempt to reinitialize new repository with an old tool.
	 */
	check_repository_format();

	reinit = create_default_files(git_dir, template_dir);

	/*
	 * And set up the object store.
	 */
	sha1_dir = get_object_directory();
	len = strlen(sha1_dir);
	path = xmalloc(len + 40);
	memcpy(path, sha1_dir, len);

	safe_create_dir(sha1_dir, 1);
	strcpy(path+len, "/pack");
	safe_create_dir(path, 1);
	strcpy(path+len, "/info");
	safe_create_dir(path, 1);

	if (shared_repository) {
		char buf[10];
		/* We do not spell "group" and such, so that
		 * the configuration can be read by older version
		 * of git.
		 */
		sprintf(buf, "%d", shared_repository);
		git_config_set("core.sharedrepository", buf);
		git_config_set("receive.denyNonFastforwards", "true");
	}

	if (!quiet)
		printf("%s%s Git repository in %s/\n",
		       reinit ? "Reinitialized existing" : "Initialized empty",
		       shared_repository ? " shared" : "",
		       git_dir);

	return 0;
}
Commit	Line	Data
8bc9a0c7 LT	1	/*
	2	* GIT - The information manager from hell
	3	*
	4	* Copyright (C) Linus Torvalds, 2005
	5	*/
e83c5163	6	#include "cache.h"
c3c8835f	7	#include "builtin.h"
e83c5163	8
d3af621b	9	#ifndef DEFAULT_GIT_TEMPLATE_DIR
d52fd42a	10	#define DEFAULT_GIT_TEMPLATE_DIR "/usr/share/git-core/templates"
d3af621b JH	11	#endif
d3af621b JH	12
c869753e SP	13	#ifdef NO_TRUSTABLE_FILEMODE
	14	#define TEST_FILEMODE 0
	15	#else
	16	#define TEST_FILEMODE 1
	17	#endif
	18
af6e277c	19	static void safe_create_dir(const char *dir, int share)
cb126d8d	20	{
f312de01	21	if (mkdir(dir, 0777) < 0) {
cb126d8d ZW	22	if (errno != EEXIST) {
	23	perror(dir);
	24	exit(1);
	25	}
	26	}
af6e277c JS	27	else if (share && adjust_shared_perm(dir))
af6e277c JS	28	die("Could not make %s writable by group\n", dir);
cb126d8d ZW	29	}
cb126d8d ZW	30
8d5afef0 JH	31	static int copy_file(const char dst, const char src, int mode)
8d5afef0 JH	32	{
32276c80	33	int fdi, fdo, status;
8d5afef0 JH	34
	35	mode = (mode & 0111) ? 0777 : 0666;
	36	if ((fdi = open(src, O_RDONLY)) < 0)
	37	return fdi;
	38	if ((fdo = open(dst, O_WRONLY \| O_CREAT \| O_EXCL, mode)) < 0) {
	39	close(fdi);
	40	return fdo;
	41	}
32276c80	42	status = copy_fd(fdi, fdo);
91c8d590 JM	43	if (close(fdo) != 0)
91c8d590 JM	44	return error("%s: write error: %s", dst, strerror(errno));
af6e277c JS	45
	46	if (!status && adjust_shared_perm(dst))
	47	return -1;
	48
32276c80	49	return status;
8d5afef0 JH	50	}
	51
	52	static void copy_templates_1(char *path, int baselen,
	53	char *template, int template_baselen,
	54	DIR *dir)
	55	{
	56	struct dirent *de;
	57
	58	/* Note: if ".git/hooks" file exists in the repository being
	59	* re-initialized, /etc/core-git/templates/hooks/update would
5c94f87e	60	* cause git-init to fail here. I think this is sane but
8d5afef0 JH	61	* it means that the set of templates we ship by default, along
	62	* with the way the namespace under .git/ is organized, should
	63	* be really carefully chosen.
	64	*/
af6e277c	65	safe_create_dir(path, 1);
8d5afef0 JH	66	while ((de = readdir(dir)) != NULL) {
	67	struct stat st_git, st_template;
	68	int namelen;
	69	int exists = 0;
	70
	71	if (de->d_name[0] == '.')
	72	continue;
	73	namelen = strlen(de->d_name);
	74	if ((PATH_MAX <= baselen + namelen) \|\|
	75	(PATH_MAX <= template_baselen + namelen))
	76	die("insanely long template name %s", de->d_name);
	77	memcpy(path + baselen, de->d_name, namelen+1);
	78	memcpy(template + template_baselen, de->d_name, namelen+1);
	79	if (lstat(path, &st_git)) {
	80	if (errno != ENOENT)
	81	die("cannot stat %s", path);
	82	}
	83	else
	84	exists = 1;
	85
	86	if (lstat(template, &st_template))
	87	die("cannot stat template %s", template);
	88
	89	if (S_ISDIR(st_template.st_mode)) {
	90	DIR *subdir = opendir(template);
	91	int baselen_sub = baselen + namelen;
	92	int template_baselen_sub = template_baselen + namelen;
	93	if (!subdir)
	94	die("cannot opendir %s", template);
	95	path[baselen_sub++] =
	96	template[template_baselen_sub++] = '/';
	97	path[baselen_sub] =
	98	template[template_baselen_sub] = 0;
	99	copy_templates_1(path, baselen_sub,
	100	template, template_baselen_sub,
	101	subdir);
	102	closedir(subdir);
	103	}
	104	else if (exists)
	105	continue;
	106	else if (S_ISLNK(st_template.st_mode)) {
	107	char lnk[256];
	108	int len;
	109	len = readlink(template, lnk, sizeof(lnk));
	110	if (len < 0)
	111	die("cannot readlink %s", template);
	112	if (sizeof(lnk) <= len)
	113	die("insanely long symlink %s", template);
	114	lnk[len] = 0;
	115	if (symlink(lnk, path))
	116	die("cannot symlink %s %s", lnk, path);
	117	}
	118	else if (S_ISREG(st_template.st_mode)) {
	119	if (copy_file(path, template, st_template.st_mode))
	120	die("cannot copy %s to %s", template, path);
	121	}
	122	else
	123	error("ignoring template %s", template);
	124	}
	125	}
	126
c3c8835f	127	static void copy_templates(const char git_dir, int len, const char template_dir)
8d5afef0 JH	128	{
	129	char path[PATH_MAX];
	130	char template_path[PATH_MAX];
d3af621b	131	int template_len;
8d5afef0 JH	132	DIR *dir;
8d5afef0 JH	133
8683a45d	134	if (!template_dir) {
d4ebc36c	135	template_dir = getenv(TEMPLATE_DIR_ENVIRONMENT);
8683a45d JS	136	if (!template_dir)
	137	template_dir = DEFAULT_GIT_TEMPLATE_DIR;
	138	}
8d5afef0 JH	139	strcpy(template_path, template_dir);
	140	template_len = strlen(template_path);
	141	if (template_path[template_len-1] != '/') {
	142	template_path[template_len++] = '/';
	143	template_path[template_len] = 0;
	144	}
8d5afef0	145	dir = opendir(template_path);
d3af621b JH	146	if (!dir) {
	147	fprintf(stderr, "warning: templates not found %s\n",
	148	template_dir);
8d5afef0	149	return;
d3af621b JH	150	}
d3af621b JH	151
4f629539 JH	152	/* Make sure that template is from the correct vintage */
	153	strcpy(template_path + template_len, "config");
	154	repository_format_version = 0;
	155	git_config_from_file(check_repository_format_version,
	156	template_path);
	157	template_path[template_len] = 0;
	158
	159	if (repository_format_version &&
	160	repository_format_version != GIT_REPO_VERSION) {
	161	fprintf(stderr, "warning: not copying templates of "
	162	"a wrong format version %d from '%s'\n",
	163	repository_format_version,
	164	template_dir);
	165	closedir(dir);
	166	return;
	167	}
	168
d3af621b	169	memcpy(path, git_dir, len);
1f961c19	170	path[len] = 0;
8d5afef0 JH	171	copy_templates_1(path, len,
	172	template_path, template_len,
	173	dir);
	174	closedir(dir);
	175	}
	176
e90fdc39	177	static int create_default_files(const char git_dir, const char template_path)
cad88fdf LT	178	{
	179	unsigned len = strlen(git_dir);
	180	static char path[PATH_MAX];
8098a178	181	unsigned char sha1[20];
4f629539 JH	182	struct stat st1;
4f629539 JH	183	char repo_version_string[10];
ef0a89a6	184	int reinit;
c869753e	185	int filemode;
cad88fdf LT	186
	187	if (len > sizeof(path)-50)
	188	die("insane git directory %s", git_dir);
	189	memcpy(path, git_dir, len);
	190
	191	if (len && path[len-1] != '/')
	192	path[len++] = '/';
	193
	194	/*
	195	* Create .git/refs/{heads,tags}
	196	*/
	197	strcpy(path + len, "refs");
af6e277c	198	safe_create_dir(path, 1);
cad88fdf	199	strcpy(path + len, "refs/heads");
af6e277c	200	safe_create_dir(path, 1);
cad88fdf	201	strcpy(path + len, "refs/tags");
af6e277c	202	safe_create_dir(path, 1);
cad88fdf	203
4f629539 JH	204	/* First copy the templates -- we might have the default
	205	* config file there, in which case we would want to read
	206	* from it after installing.
	207	*/
	208	path[len] = 0;
	209	copy_templates(path, len, template_path);
	210
	211	git_config(git_default_config);
	212
138086a7 JH	213	/*
	214	* We would have created the above under user's umask -- under
	215	* shared-repository settings, we would need to fix them up.
	216	*/
	217	if (shared_repository) {
	218	path[len] = 0;
	219	adjust_shared_perm(path);
	220	strcpy(path + len, "refs");
	221	adjust_shared_perm(path);
	222	strcpy(path + len, "refs/heads");
	223	adjust_shared_perm(path);
	224	strcpy(path + len, "refs/tags");
	225	adjust_shared_perm(path);
	226	}
	227
cad88fdf LT	228	/*
cad88fdf LT	229	* Create the default symlink from ".git/HEAD" to the "master"
8098a178	230	* branch, if it does not exist yet.
cad88fdf LT	231	*/
cad88fdf LT	232	strcpy(path + len, "HEAD");
ef0a89a6 SP	233	reinit = !read_ref("HEAD", sha1);
ef0a89a6 SP	234	if (!reinit) {
8b5157e4	235	if (create_symref("HEAD", "refs/heads/master", NULL) < 0)
cad88fdf	236	exit(1);
cad88fdf	237	}
e24317b4	238
4f629539 JH	239	/* This forces creation of new config file */
	240	sprintf(repo_version_string, "%d", GIT_REPO_VERSION);
	241	git_config_set("core.repositoryformatversion", repo_version_string);
	242
	243	path[len] = 0;
e24317b4	244	strcpy(path + len, "config");
4f629539 JH	245
4f629539 JH	246	/* Check filemode trustability */
c869753e SP	247	filemode = TEST_FILEMODE;
c869753e SP	248	if (TEST_FILEMODE && !lstat(path, &st1)) {
4f629539	249	struct stat st2;
c869753e	250	filemode = (!chmod(path, st1.st_mode ^ S_IXUSR) &&
4f629539 JH	251	!lstat(path, &st2) &&
4f629539 JH	252	st1.st_mode != st2.st_mode);
e24317b4	253	}
c869753e	254	git_config_set("core.filemode", filemode ? "true" : "false");
ef0a89a6	255
e90fdc39	256	if (is_bare_repository())
7d1864ce	257	git_config_set("core.bare", "true");
7d1864ce	258	else {
e90fdc39	259	const char *work_tree = get_git_work_tree();
7d1864ce	260	git_config_set("core.bare", "false");
196055c2 AR	261	/* allow template config file to override the default */
	262	if (log_all_ref_updates == -1)
	263	git_config_set("core.logallrefupdates", "true");
e90fdc39 JS	264	if (work_tree != git_work_tree_cfg)
e90fdc39 JS	265	git_config_set("core.worktree", work_tree);
7d1864ce	266	}
ef0a89a6	267	return reinit;
cad88fdf LT	268	}
cad88fdf LT	269
6adcca3f JH	270	static void guess_repository_type(const char *git_dir)
	271	{
	272	char cwd[PATH_MAX];
	273	const char *slash;
	274
	275	if (0 <= is_bare_repository_cfg)
	276	return;
	277	if (!git_dir)
	278	return;
	279
	280	/*
	281	* "GIT_DIR=. git init" is always bare.
	282	* "GIT_DIR=`pwd` git init" too.
	283	*/
	284	if (!strcmp(".", git_dir))
	285	goto force_bare;
	286	if (!getcwd(cwd, sizeof(cwd)))
	287	die("cannot tell cwd");
	288	if (!strcmp(git_dir, cwd))
	289	goto force_bare;
	290	/*
	291	* "GIT_DIR=.git or GIT_DIR=something/.git is usually not.
	292	*/
	293	if (!strcmp(git_dir, ".git"))
	294	return;
	295	slash = strrchr(git_dir, '/');
	296	if (slash && !strcmp(slash, "/.git"))
	297	return;
	298
	299	/*
	300	* Otherwise it is often bare. At this point
	301	* we are just guessing.
	302	*/
	303	force_bare:
	304	is_bare_repository_cfg = 1;
	305	return;
	306	}
	307
d3af621b	308	static const char init_db_usage[] =
4576518d	309	"git-init [-q \| --quiet] [--template=<template-directory>] [--shared]";
d3af621b	310
4696cb93 ZW	311	/*
	312	* If you want to, you can share the DB area with any number of branches.
	313	* That has advantages: you can save space by sharing all the SHA1 objects.
	314	* On the other hand, it might just make lookup slower and messier. You
	315	* be the judge. The default case is to have one DB per managed directory.
	316	*/
a633fca0	317	int cmd_init_db(int argc, const char *argv, const char prefix)
e83c5163	318	{
cad88fdf	319	const char *git_dir;
d19938ab	320	const char *sha1_dir;
c3c8835f TH	321	const char *template_dir = NULL;
c3c8835f TH	322	char *path;
ef0a89a6	323	int len, i, reinit;
4576518d	324	int quiet = 0;
e83c5163	325
d3af621b	326	for (i = 1; i < argc; i++, argv++) {
c3c8835f	327	const char *arg = argv[1];
cc44c765	328	if (!prefixcmp(arg, "--template="))
d3af621b	329	template_dir = arg+11;
af6e277c	330	else if (!strcmp(arg, "--shared"))
94df2506	331	shared_repository = PERM_GROUP;
cc44c765	332	else if (!prefixcmp(arg, "--shared="))
94df2506	333	shared_repository = git_config_perm("arg", arg+9);
4576518d JO	334	else if (!strcmp(arg, "-q") \|\| !strcmp(arg, "--quiet"))
4576518d JO	335	quiet = 1;
d3af621b	336	else
8cdf3364	337	usage(init_db_usage);
d3af621b JH	338	}
d3af621b JH	339
6adcca3f JH	340	/*
	341	* GIT_WORK_TREE makes sense only in conjunction with GIT_DIR
	342	* without --bare. Catch the error early.
	343	*/
	344	git_dir = getenv(GIT_DIR_ENVIRONMENT);
	345	if ((!git_dir \|\| is_bare_repository_cfg == 1)
	346	&& getenv(GIT_WORK_TREE_ENVIRONMENT))
	347	die("%s (or --work-tree=<directory>) not allowed without "
	348	"specifying %s (or --git-dir=<directory>)",
	349	GIT_WORK_TREE_ENVIRONMENT,
	350	GIT_DIR_ENVIRONMENT);
	351
	352	guess_repository_type(git_dir);
	353
	354	if (is_bare_repository_cfg <= 0) {
	355	git_work_tree_cfg = xcalloc(PATH_MAX, 1);
	356	if (!getcwd(git_work_tree_cfg, PATH_MAX))
	357	die ("Cannot access current working directory.");
	358	if (access(get_git_work_tree(), X_OK))
	359	die ("Cannot access work tree '%s'",
	360	get_git_work_tree());
	361	}
ef6f0af2	362
cad88fdf LT	363	/*
	364	* Set up the default .git directory contents
	365	*/
a9ab586a	366	git_dir = getenv(GIT_DIR_ENVIRONMENT);
ef0a89a6	367	if (!git_dir)
cad88fdf	368	git_dir = DEFAULT_GIT_DIR_ENVIRONMENT;
af6e277c	369	safe_create_dir(git_dir, 0);
4f629539 JH	370
	371	/* Check to see if the repository version is right.
	372	* Note that a newly created repository does not have
	373	* config file, so this will not fail. What we are catching
	374	* is an attempt to reinitialize new repository with an old tool.
	375	*/
	376	check_repository_format();
	377
e90fdc39	378	reinit = create_default_files(git_dir, template_dir);
cad88fdf LT	379
	380	/*
	381	* And set up the object store.
	382	*/
	383	sha1_dir = get_object_directory();
e83c5163	384	len = strlen(sha1_dir);
812666c8	385	path = xmalloc(len + 40);
e83c5163	386	memcpy(path, sha1_dir, len);
cb126d8d	387
af6e277c	388	safe_create_dir(sha1_dir, 1);
f49fb35d	389	strcpy(path+len, "/pack");
af6e277c	390	safe_create_dir(path, 1);
d57306c7	391	strcpy(path+len, "/info");
af6e277c JS	392	safe_create_dir(path, 1);
af6e277c JS	393
94df2506 JH	394	if (shared_repository) {
	395	char buf[10];
	396	/* We do not spell "group" and such, so that
	397	* the configuration can be read by older version
	398	* of git.
	399	*/
	400	sprintf(buf, "%d", shared_repository);
	401	git_config_set("core.sharedrepository", buf);
11031d7e	402	git_config_set("receive.denyNonFastforwards", "true");
94df2506	403	}
af6e277c	404
4576518d JO	405	if (!quiet)
	406	printf("%s%s Git repository in %s/\n",
	407	reinit ? "Reinitialized existing" : "Initialized empty",
	408	shared_repository ? " shared" : "",
	409	git_dir);
ef0a89a6	410
e83c5163 LT	411	return 0;
e83c5163 LT	412	}