[thirdparty/git.git] / setup.c

#include "cache.h"

const char *prefix_path(const char *prefix, int len, const char *path)
{
	const char *orig = path;
	for (;;) {
		char c;
		if (*path != '.')
			break;
		c = path[1];
		/* "." */
		if (!c) {
			path++;
			break;
		}
		/* "./" */
		if (c == '/') {
			path += 2;
			continue;
		}
		if (c != '.')
			break;
		c = path[2];
		if (!c)
			path += 2;
		else if (c == '/')
			path += 3;
		else
			break;
		/* ".." and "../" */
		/* Remove last component of the prefix */
		do {
			if (!len)
				die("'%s' is outside repository", orig);
			len--;
		} while (len && prefix[len-1] != '/');
		continue;
	}
	if (len) {
		int speclen = strlen(path);
		char *n = xmalloc(speclen + len + 1);

		memcpy(n, prefix, len);
		memcpy(n + len, path, speclen+1);
		path = n;
	}
	return path;
}

/*
 * Unlike prefix_path, this should be used if the named file does
 * not have to interact with index entry; i.e. name of a random file
 * on the filesystem.
 */
const char *prefix_filename(const char *pfx, int pfx_len, const char *arg)
{
	static char path[PATH_MAX];
	if (!pfx || !*pfx || arg[0] == '/')
		return arg;
	memcpy(path, pfx, pfx_len);
	strcpy(path + pfx_len, arg);
	return path;
}

/*
 * Verify a filename that we got as an argument for a pathspec
 * entry. Note that a filename that begins with "-" never verifies
 * as true, because even if such a filename were to exist, we want
 * it to be preceded by the "--" marker (or we want the user to
 * use a format like "./-filename")
 */
void verify_filename(const char *prefix, const char *arg)
{
	const char *name;
	struct stat st;

	if (*arg == '-')
		die("bad flag '%s' used after filename", arg);
	name = prefix ? prefix_filename(prefix, strlen(prefix), arg) : arg;
	if (!lstat(name, &st))
		return;
	if (errno == ENOENT)
		die("ambiguous argument '%s': unknown revision or path not in the working tree.\n"
		    "Use '--' to separate paths from revisions", arg);
	die("'%s': %s", arg, strerror(errno));
}

/*
 * Opposite of the above: the command line did not have -- marker
 * and we parsed the arg as a refname.  It should not be interpretable
 * as a filename.
 */
void verify_non_filename(const char *prefix, const char *arg)
{
	const char *name;
	struct stat st;

	if (!is_inside_work_tree() || is_inside_git_dir())
		return;
	if (*arg == '-')
		return; /* flag */
	name = prefix ? prefix_filename(prefix, strlen(prefix), arg) : arg;
	if (!lstat(name, &st))
		die("ambiguous argument '%s': both revision and filename\n"
		    "Use '--' to separate filenames from revisions", arg);
	if (errno != ENOENT)
		die("'%s': %s", arg, strerror(errno));
}

const char **get_pathspec(const char *prefix, const char **pathspec)
{
	const char *entry = *pathspec;
	const char **p;
	int prefixlen;

	if (!prefix && !entry)
		return NULL;

	if (!entry) {
		static const char *spec[2];
		spec[0] = prefix;
		spec[1] = NULL;
		return spec;
	}

	/* Otherwise we have to re-write the entries.. */
	p = pathspec;
	prefixlen = prefix ? strlen(prefix) : 0;
	do {
		*p = prefix_path(prefix, prefixlen, entry);
	} while ((entry = *++p) != NULL);
	return (const char **) pathspec;
}

/*
 * Test if it looks like we're at a git directory.
 * We want to see:
 *
 *  - either a objects/ directory _or_ the proper
 *    GIT_OBJECT_DIRECTORY environment variable
 *  - a refs/ directory
 *  - either a HEAD symlink or a HEAD file that is formatted as
 *    a proper "ref:", or a regular file HEAD that has a properly
 *    formatted sha1 object name.
 */
static int is_git_directory(const char *suspect)
{
	char path[PATH_MAX];
	size_t len = strlen(suspect);

	strcpy(path, suspect);
	if (getenv(DB_ENVIRONMENT)) {
		if (access(getenv(DB_ENVIRONMENT), X_OK))
			return 0;
	}
	else {
		strcpy(path + len, "/objects");
		if (access(path, X_OK))
			return 0;
	}

	strcpy(path + len, "/refs");
	if (access(path, X_OK))
		return 0;

	strcpy(path + len, "/HEAD");
	if (validate_headref(path))
		return 0;

	return 1;
}

static int inside_git_dir = -1;

int is_inside_git_dir(void)
{
	if (inside_git_dir >= 0)
		return inside_git_dir;
	die("BUG: is_inside_git_dir called before setup_git_directory");
}

static int inside_work_tree = -1;

int is_inside_work_tree(void)
{
	if (inside_git_dir >= 0)
		return inside_work_tree;
	die("BUG: is_inside_work_tree called before setup_git_directory");
}

static char *gitworktree_config;

static int git_setup_config(const char *var, const char *value)
{
	if (!strcmp(var, "core.worktree")) {
		if (gitworktree_config)
			strlcpy(gitworktree_config, value, PATH_MAX);
		return 0;
	}
	return git_default_config(var, value);
}

const char *setup_git_directory_gently(int *nongit_ok)
{
	static char cwd[PATH_MAX+1];
	char worktree[PATH_MAX+1], gitdir[PATH_MAX+1];
	const char *gitdirenv, *gitworktree;
	int wt_rel_gitdir = 0;

	gitdirenv = getenv(GIT_DIR_ENVIRONMENT);
	if (!gitdirenv) {
		int len, offset;

		if (!getcwd(cwd, sizeof(cwd)-1))
			die("Unable to read current working directory");

		offset = len = strlen(cwd);
		for (;;) {
			if (is_git_directory(".git"))
				break;
			if (offset == 0) {
				offset = -1;
				break;
			}
			chdir("..");
			while (cwd[--offset] != '/')
				; /* do nothing */
		}

		if (offset >= 0) {
			inside_work_tree = 1;
			git_config(git_default_config);
			if (offset == len) {
				inside_git_dir = 0;
				return NULL;
			}

			cwd[len++] = '/';
			cwd[len] = '\0';
			inside_git_dir = !prefixcmp(cwd + offset + 1, ".git/");
			return cwd + offset + 1;
		}

		if (chdir(cwd))
			die("Cannot come back to cwd");
		if (!is_git_directory(".")) {
			if (nongit_ok) {
				*nongit_ok = 1;
				return NULL;
			}
			die("Not a git repository");
		}
		setenv(GIT_DIR_ENVIRONMENT, cwd, 1);
		gitdirenv = getenv(GIT_DIR_ENVIRONMENT);
		if (!gitdirenv)
			die("getenv after setenv failed");
	}

	if (PATH_MAX - 40 < strlen(gitdirenv)) {
		if (nongit_ok) {
			*nongit_ok = 1;
			return NULL;
		}
		die("$%s too big", GIT_DIR_ENVIRONMENT);
	}
	if (!is_git_directory(gitdirenv)) {
		if (nongit_ok) {
			*nongit_ok = 1;
			return NULL;
		}
		die("Not a git repository: '%s'", gitdirenv);
	}

	if (!getcwd(cwd, sizeof(cwd)-1))
		die("Unable to read current working directory");
	if (chdir(gitdirenv)) {
		if (nongit_ok) {
			*nongit_ok = 1;
			return NULL;
		}
		die("Cannot change directory to $%s '%s'",
			GIT_DIR_ENVIRONMENT, gitdirenv);
	}
	if (!getcwd(gitdir, sizeof(gitdir)-1))
		die("Unable to read current working directory");
	if (chdir(cwd))
		die("Cannot come back to cwd");

	/*
	 * In case there is a work tree we may change the directory,
	 * therefore make GIT_DIR an absolute path.
	 */
	if (gitdirenv[0] != '/') {
		setenv(GIT_DIR_ENVIRONMENT, gitdir, 1);
		gitdirenv = getenv(GIT_DIR_ENVIRONMENT);
		if (!gitdirenv)
			die("getenv after setenv failed");
		if (PATH_MAX - 40 < strlen(gitdirenv)) {
			if (nongit_ok) {
				*nongit_ok = 1;
				return NULL;
			}
			die("$%s too big after expansion to absolute path",
				GIT_DIR_ENVIRONMENT);
		}
	}

	strcat(cwd, "/");
	strcat(gitdir, "/");
	inside_git_dir = !prefixcmp(cwd, gitdir);

	gitworktree = getenv(GIT_WORK_TREE_ENVIRONMENT);
	if (!gitworktree) {
		gitworktree_config = worktree;
		worktree[0] = '\0';
	}
	git_config(git_setup_config);
	if (!gitworktree) {
		gitworktree_config = NULL;
		if (worktree[0])
			gitworktree = worktree;
		if (gitworktree && gitworktree[0] != '/')
			wt_rel_gitdir = 1;
	}

	if (wt_rel_gitdir && chdir(gitdirenv))
		die("Cannot change directory to $%s '%s'",
			GIT_DIR_ENVIRONMENT, gitdirenv);
	if (gitworktree && chdir(gitworktree)) {
		if (nongit_ok) {
			if (wt_rel_gitdir && chdir(cwd))
				die("Cannot come back to cwd");
			*nongit_ok = 1;
			return NULL;
		}
		if (wt_rel_gitdir)
			die("Cannot change directory to working tree '%s'"
				" from $%s", gitworktree, GIT_DIR_ENVIRONMENT);
		else
			die("Cannot change directory to working tree '%s'",
				gitworktree);
	}
	if (!getcwd(worktree, sizeof(worktree)-1))
		die("Unable to read current working directory");
	strcat(worktree, "/");
	inside_work_tree = !prefixcmp(cwd, worktree);

	if (gitworktree && inside_work_tree && !prefixcmp(worktree, gitdir) &&
	    strcmp(worktree, gitdir)) {
		inside_git_dir = 0;
	}

	if (!inside_work_tree) {
		if (chdir(cwd))
			die("Cannot come back to cwd");
		return NULL;
	}

	if (!strcmp(cwd, worktree))
		return NULL;
	return cwd+strlen(worktree);
}

int git_config_perm(const char *var, const char *value)
{
	if (value) {
		int i;
		if (!strcmp(value, "umask"))
			return PERM_UMASK;
		if (!strcmp(value, "group"))
			return PERM_GROUP;
		if (!strcmp(value, "all") ||
		    !strcmp(value, "world") ||
		    !strcmp(value, "everybody"))
			return PERM_EVERYBODY;
		i = atoi(value);
		if (i > 1)
			return i;
	}
	return git_config_bool(var, value);
}

int check_repository_format_version(const char *var, const char *value)
{
	if (strcmp(var, "core.repositoryformatversion") == 0)
		repository_format_version = git_config_int(var, value);
	else if (strcmp(var, "core.sharedrepository") == 0)
		shared_repository = git_config_perm(var, value);
	return 0;
}

int check_repository_format(void)
{
	git_config(check_repository_format_version);
	if (GIT_REPO_VERSION < repository_format_version)
		die ("Expected git repo version <= %d, found %d",
		     GIT_REPO_VERSION, repository_format_version);
	return 0;
}

const char *setup_git_directory(void)
{
	const char *retval = setup_git_directory_gently(NULL);
	check_repository_format();
	return retval;
}
Commit	Line	Data
d288a700 LT	1	#include "cache.h"
d288a700 LT	2
6b5ee137	3	const char prefix_path(const char prefix, int len, const char *path)
f332726e	4	{
6b5ee137	5	const char *orig = path;
f332726e LT	6	for (;;) {
	7	char c;
	8	if (*path != '.')
	9	break;
	10	c = path[1];
	11	/* "." */
	12	if (!c) {
	13	path++;
	14	break;
	15	}
	16	/* "./" */
	17	if (c == '/') {
	18	path += 2;
	19	continue;
	20	}
	21	if (c != '.')
	22	break;
	23	c = path[2];
	24	if (!c)
	25	path += 2;
	26	else if (c == '/')
	27	path += 3;
	28	else
	29	break;
	30	/* ".." and "../" */
	31	/* Remove last component of the prefix */
	32	do {
	33	if (!len)
	34	die("'%s' is outside repository", orig);
	35	len--;
	36	} while (len && prefix[len-1] != '/');
	37	continue;
	38	}
	39	if (len) {
	40	int speclen = strlen(path);
	41	char *n = xmalloc(speclen + len + 1);
a6080a0a	42
f332726e LT	43	memcpy(n, prefix, len);
	44	memcpy(n + len, path, speclen+1);
	45	path = n;
	46	}
	47	return path;
	48	}
	49
a6080a0a	50	/*
4ca06608 JH	51	* Unlike prefix_path, this should be used if the named file does
	52	* not have to interact with index entry; i.e. name of a random file
	53	* on the filesystem.
	54	*/
	55	const char prefix_filename(const char pfx, int pfx_len, const char *arg)
	56	{
	57	static char path[PATH_MAX];
	58	if (!pfx \|\| !*pfx \|\| arg[0] == '/')
	59	return arg;
	60	memcpy(path, pfx, pfx_len);
	61	strcpy(path + pfx_len, arg);
	62	return path;
	63	}
	64
e23d0b4a LT	65	/*
	66	* Verify a filename that we got as an argument for a pathspec
	67	* entry. Note that a filename that begins with "-" never verifies
	68	* as true, because even if such a filename were to exist, we want
	69	* it to be preceded by the "--" marker (or we want the user to
	70	* use a format like "./-filename")
	71	*/
	72	void verify_filename(const char prefix, const char arg)
	73	{
	74	const char *name;
	75	struct stat st;
	76
	77	if (*arg == '-')
	78	die("bad flag '%s' used after filename", arg);
	79	name = prefix ? prefix_filename(prefix, strlen(prefix), arg) : arg;
	80	if (!lstat(name, &st))
	81	return;
	82	if (errno == ENOENT)
ea92f41f JH	83	die("ambiguous argument '%s': unknown revision or path not in the working tree.\n"
ea92f41f JH	84	"Use '--' to separate paths from revisions", arg);
e23d0b4a LT	85	die("'%s': %s", arg, strerror(errno));
	86	}
	87
ea92f41f JH	88	/*
	89	* Opposite of the above: the command line did not have -- marker
	90	* and we parsed the arg as a refname. It should not be interpretable
	91	* as a filename.
	92	*/
	93	void verify_non_filename(const char prefix, const char arg)
	94	{
	95	const char *name;
	96	struct stat st;
	97
7ae3df8c	98	if (!is_inside_work_tree() \|\| is_inside_git_dir())
68025633	99	return;
ea92f41f JH	100	if (*arg == '-')
	101	return; /* flag */
	102	name = prefix ? prefix_filename(prefix, strlen(prefix), arg) : arg;
	103	if (!lstat(name, &st))
	104	die("ambiguous argument '%s': both revision and filename\n"
	105	"Use '--' to separate filenames from revisions", arg);
	106	if (errno != ENOENT)
	107	die("'%s': %s", arg, strerror(errno));
	108	}
	109
6b5ee137	110	const char *get_pathspec(const char prefix, const char **pathspec)
d288a700	111	{
6b5ee137 JH	112	const char entry = pathspec;
6b5ee137 JH	113	const char **p;
d288a700 LT	114	int prefixlen;
d288a700 LT	115
f332726e LT	116	if (!prefix && !entry)
f332726e LT	117	return NULL;
d288a700 LT	118
	119	if (!entry) {
	120	static const char *spec[2];
	121	spec[0] = prefix;
	122	spec[1] = NULL;
	123	return spec;
	124	}
	125
	126	/* Otherwise we have to re-write the entries.. */
d288a700	127	p = pathspec;
f332726e	128	prefixlen = prefix ? strlen(prefix) : 0;
d288a700	129	do {
f332726e	130	*p = prefix_path(prefix, prefixlen, entry);
d288a700 LT	131	} while ((entry = *++p) != NULL);
	132	return (const char **) pathspec;
	133	}
	134
5f5608bc	135	/*
ad1a382f	136	* Test if it looks like we're at a git directory.
5e7bfe25	137	* We want to see:
5f5608bc	138	*
ad1a382f	139	* - either a objects/ directory _or_ the proper
5f5608bc	140	* GIT_OBJECT_DIRECTORY environment variable
ad1a382f	141	* - a refs/ directory
8098a178	142	* - either a HEAD symlink or a HEAD file that is formatted as
c847f537 JH	143	* a proper "ref:", or a regular file HEAD that has a properly
c847f537 JH	144	* formatted sha1 object name.
5f5608bc	145	*/
ad1a382f	146	static int is_git_directory(const char *suspect)
5f5608bc	147	{
ad1a382f SP	148	char path[PATH_MAX];
	149	size_t len = strlen(suspect);
	150
	151	strcpy(path, suspect);
	152	if (getenv(DB_ENVIRONMENT)) {
	153	if (access(getenv(DB_ENVIRONMENT), X_OK))
	154	return 0;
	155	}
	156	else {
	157	strcpy(path + len, "/objects");
	158	if (access(path, X_OK))
	159	return 0;
	160	}
	161
	162	strcpy(path + len, "/refs");
	163	if (access(path, X_OK))
8098a178	164	return 0;
ad1a382f SP	165
ad1a382f SP	166	strcpy(path + len, "/HEAD");
c847f537	167	if (validate_headref(path))
ad1a382f SP	168	return 0;
ad1a382f SP	169
8098a178	170	return 1;
5f5608bc LT	171	}
5f5608bc LT	172
68025633 JS	173	static int inside_git_dir = -1;
	174
	175	int is_inside_git_dir(void)
	176	{
892c41b9 ML	177	if (inside_git_dir >= 0)
	178	return inside_git_dir;
	179	die("BUG: is_inside_git_dir called before setup_git_directory");
	180	}
	181
	182	static int inside_work_tree = -1;
	183
	184	int is_inside_work_tree(void)
	185	{
	186	if (inside_git_dir >= 0)
	187	return inside_work_tree;
	188	die("BUG: is_inside_work_tree called before setup_git_directory");
	189	}
	190
	191	static char *gitworktree_config;
	192
	193	static int git_setup_config(const char var, const char value)
	194	{
	195	if (!strcmp(var, "core.worktree")) {
	196	if (gitworktree_config)
	197	strlcpy(gitworktree_config, value, PATH_MAX);
	198	return 0;
68025633	199	}
892c41b9	200	return git_default_config(var, value);
68025633 JS	201	}
68025633 JS	202
4ca06608	203	const char setup_git_directory_gently(int nongit_ok)
d288a700 LT	204	{
d288a700 LT	205	static char cwd[PATH_MAX+1];
892c41b9 ML	206	char worktree[PATH_MAX+1], gitdir[PATH_MAX+1];
	207	const char gitdirenv, gitworktree;
	208	int wt_rel_gitdir = 0;
d288a700	209
ad1a382f	210	gitdirenv = getenv(GIT_DIR_ENVIRONMENT);
892c41b9 ML	211	if (!gitdirenv) {
	212	int len, offset;
	213
f66a4d68	214	if (!getcwd(cwd, sizeof(cwd)-1))
892c41b9 ML	215	die("Unable to read current working directory");
	216
	217	offset = len = strlen(cwd);
	218	for (;;) {
	219	if (is_git_directory(".git"))
	220	break;
	221	if (offset == 0) {
	222	offset = -1;
	223	break;
	224	}
	225	chdir("..");
	226	while (cwd[--offset] != '/')
	227	; /* do nothing */
	228	}
	229
	230	if (offset >= 0) {
	231	inside_work_tree = 1;
	232	git_config(git_default_config);
	233	if (offset == len) {
	234	inside_git_dir = 0;
	235	return NULL;
	236	}
	237
	238	cwd[len++] = '/';
	239	cwd[len] = '\0';
	240	inside_git_dir = !prefixcmp(cwd + offset + 1, ".git/");
	241	return cwd + offset + 1;
	242	}
	243
	244	if (chdir(cwd))
	245	die("Cannot come back to cwd");
	246	if (!is_git_directory(".")) {
	247	if (nongit_ok) {
	248	*nongit_ok = 1;
	249	return NULL;
	250	}
	251	die("Not a git repository");
	252	}
	253	setenv(GIT_DIR_ENVIRONMENT, cwd, 1);
f4f51add ML	254	gitdirenv = getenv(GIT_DIR_ENVIRONMENT);
	255	if (!gitdirenv)
	256	die("getenv after setenv failed");
892c41b9 ML	257	}
	258
	259	if (PATH_MAX - 40 < strlen(gitdirenv)) {
	260	if (nongit_ok) {
	261	*nongit_ok = 1;
ad1a382f	262	return NULL;
892c41b9 ML	263	}
	264	die("$%s too big", GIT_DIR_ENVIRONMENT);
	265	}
	266	if (!is_git_directory(gitdirenv)) {
3a3c3fc4	267	if (nongit_ok) {
41e95f69 ML	268	*nongit_ok = 1;
	269	return NULL;
	270	}
ad1a382f	271	die("Not a git repository: '%s'", gitdirenv);
5e7bfe25	272	}
d288a700	273
f66a4d68	274	if (!getcwd(cwd, sizeof(cwd)-1))
d288a700	275	die("Unable to read current working directory");
892c41b9 ML	276	if (chdir(gitdirenv)) {
	277	if (nongit_ok) {
	278	*nongit_ok = 1;
	279	return NULL;
	280	}
	281	die("Cannot change directory to $%s '%s'",
	282	GIT_DIR_ENVIRONMENT, gitdirenv);
	283	}
f66a4d68	284	if (!getcwd(gitdir, sizeof(gitdir)-1))
892c41b9 ML	285	die("Unable to read current working directory");
	286	if (chdir(cwd))
	287	die("Cannot come back to cwd");
d288a700	288
892c41b9 ML	289	/*
	290	* In case there is a work tree we may change the directory,
	291	* therefore make GIT_DIR an absolute path.
	292	*/
	293	if (gitdirenv[0] != '/') {
	294	setenv(GIT_DIR_ENVIRONMENT, gitdir, 1);
	295	gitdirenv = getenv(GIT_DIR_ENVIRONMENT);
f4f51add ML	296	if (!gitdirenv)
f4f51add ML	297	die("getenv after setenv failed");
892c41b9 ML	298	if (PATH_MAX - 40 < strlen(gitdirenv)) {
	299	if (nongit_ok) {
	300	*nongit_ok = 1;
	301	return NULL;
4ca06608	302	}
892c41b9 ML	303	die("$%s too big after expansion to absolute path",
	304	GIT_DIR_ENVIRONMENT);
	305	}
	306	}
	307
	308	strcat(cwd, "/");
	309	strcat(gitdir, "/");
	310	inside_git_dir = !prefixcmp(cwd, gitdir);
	311
	312	gitworktree = getenv(GIT_WORK_TREE_ENVIRONMENT);
	313	if (!gitworktree) {
	314	gitworktree_config = worktree;
	315	worktree[0] = '\0';
	316	}
	317	git_config(git_setup_config);
	318	if (!gitworktree) {
	319	gitworktree_config = NULL;
	320	if (worktree[0])
	321	gitworktree = worktree;
	322	if (gitworktree && gitworktree[0] != '/')
	323	wt_rel_gitdir = 1;
	324	}
	325
	326	if (wt_rel_gitdir && chdir(gitdirenv))
	327	die("Cannot change directory to $%s '%s'",
	328	GIT_DIR_ENVIRONMENT, gitdirenv);
	329	if (gitworktree && chdir(gitworktree)) {
	330	if (nongit_ok) {
	331	if (wt_rel_gitdir && chdir(cwd))
	332	die("Cannot come back to cwd");
	333	*nongit_ok = 1;
	334	return NULL;
	335	}
	336	if (wt_rel_gitdir)
	337	die("Cannot change directory to working tree '%s'"
	338	" from $%s", gitworktree, GIT_DIR_ENVIRONMENT);
	339	else
	340	die("Cannot change directory to working tree '%s'",
	341	gitworktree);
d288a700	342	}
f66a4d68	343	if (!getcwd(worktree, sizeof(worktree)-1))
892c41b9 ML	344	die("Unable to read current working directory");
	345	strcat(worktree, "/");
	346	inside_work_tree = !prefixcmp(cwd, worktree);
d288a700	347
892c41b9 ML	348	if (gitworktree && inside_work_tree && !prefixcmp(worktree, gitdir) &&
	349	strcmp(worktree, gitdir)) {
	350	inside_git_dir = 0;
	351	}
	352
	353	if (!inside_work_tree) {
	354	if (chdir(cwd))
	355	die("Cannot come back to cwd");
d288a700	356	return NULL;
892c41b9	357	}
d288a700	358
892c41b9 ML	359	if (!strcmp(cwd, worktree))
	360	return NULL;
	361	return cwd+strlen(worktree);
d288a700	362	}
5e7bfe25	363
94df2506 JH	364	int git_config_perm(const char var, const char value)
	365	{
	366	if (value) {
83525227	367	int i;
94df2506 JH	368	if (!strcmp(value, "umask"))
	369	return PERM_UMASK;
	370	if (!strcmp(value, "group"))
	371	return PERM_GROUP;
	372	if (!strcmp(value, "all") \|\|
	373	!strcmp(value, "world") \|\|
	374	!strcmp(value, "everybody"))
	375	return PERM_EVERYBODY;
83525227 JS	376	i = atoi(value);
	377	if (i > 1)
	378	return i;
94df2506 JH	379	}
	380	return git_config_bool(var, value);
	381	}
	382
ab9cb76f JH	383	int check_repository_format_version(const char var, const char value)
ab9cb76f JH	384	{
299726d5 JS	385	if (strcmp(var, "core.repositoryformatversion") == 0)
299726d5 JS	386	repository_format_version = git_config_int(var, value);
457f06d6	387	else if (strcmp(var, "core.sharedrepository") == 0)
94df2506	388	shared_repository = git_config_perm(var, value);
299726d5	389	return 0;
ab9cb76f JH	390	}
	391
	392	int check_repository_format(void)
	393	{
	394	git_config(check_repository_format_version);
	395	if (GIT_REPO_VERSION < repository_format_version)
	396	die ("Expected git repo version <= %d, found %d",
	397	GIT_REPO_VERSION, repository_format_version);
	398	return 0;
	399	}
	400
5e7bfe25 JH	401	const char *setup_git_directory(void)
5e7bfe25 JH	402	{
4ca06608	403	const char *retval = setup_git_directory_gently(NULL);
22752e4c	404	check_repository_format();
5e7bfe25 JH	405	return retval;
5e7bfe25 JH	406	}