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

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

#ifndef DEFAULT_GIT_TEMPLATE_DIR
#define DEFAULT_GIT_TEMPLATE_DIR "/usr/share/git-core/templates/"
#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);
	close(fdo);

	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-db 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, char *template_dir)
{
	char path[PATH_MAX];
	char template_path[PATH_MAX];
	int template_len;
	DIR *dir;

	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 void create_default_files(const char *git_dir, 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];

	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);

	/*
	 * Create the default symlink from ".git/HEAD" to the "master"
	 * branch, if it does not exist yet.
	 */
	strcpy(path + len, "HEAD");
	if (read_ref(path, sha1) < 0) {
		if (create_symref(path, "refs/heads/master") < 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 */
	if (!lstat(path, &st1)) {
		struct stat st2;
		int 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");
	}
}

static const char init_db_usage[] =
"git-init-db [--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 main(int argc, char **argv)
{
	const char *git_dir;
	const char *sha1_dir;
	char *path, *template_dir = NULL;
	int len, i;

	for (i = 1; i < argc; i++, argv++) {
		char *arg = argv[1];
		if (!strncmp(arg, "--template=", 11))
			template_dir = arg+11;
		else if (!strcmp(arg, "--shared"))
			shared_repository = 1;
		else
			die(init_db_usage);
	}

	/*
	 * Set up the default .git directory contents
	 */
	git_dir = getenv(GIT_DIR_ENVIRONMENT);
	if (!git_dir) {
		git_dir = DEFAULT_GIT_DIR_ENVIRONMENT;
		fprintf(stderr, "defaulting to local storage area\n");
	}
	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();

	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)
		git_config_set("core.sharedRepository", "true");

	return 0;
}
Commit	Line	Data
8bc9a0c7 LT	1	/*
	2	* GIT - The information manager from hell
	3	*
	4	* Copyright (C) Linus Torvalds, 2005
	5	*/
e83c5163 LT	6	#include "cache.h"
e83c5163 LT	7
d3af621b JH	8	#ifndef DEFAULT_GIT_TEMPLATE_DIR
	9	#define DEFAULT_GIT_TEMPLATE_DIR "/usr/share/git-core/templates/"
	10	#endif
	11
af6e277c	12	static void safe_create_dir(const char *dir, int share)
cb126d8d	13	{
f312de01	14	if (mkdir(dir, 0777) < 0) {
cb126d8d ZW	15	if (errno != EEXIST) {
	16	perror(dir);
	17	exit(1);
	18	}
	19	}
af6e277c JS	20	else if (share && adjust_shared_perm(dir))
af6e277c JS	21	die("Could not make %s writable by group\n", dir);
cb126d8d ZW	22	}
cb126d8d ZW	23
8d5afef0 JH	24	static int copy_file(const char dst, const char src, int mode)
8d5afef0 JH	25	{
32276c80	26	int fdi, fdo, status;
8d5afef0 JH	27
	28	mode = (mode & 0111) ? 0777 : 0666;
	29	if ((fdi = open(src, O_RDONLY)) < 0)
	30	return fdi;
	31	if ((fdo = open(dst, O_WRONLY \| O_CREAT \| O_EXCL, mode)) < 0) {
	32	close(fdi);
	33	return fdo;
	34	}
32276c80	35	status = copy_fd(fdi, fdo);
8d5afef0	36	close(fdo);
af6e277c JS	37
	38	if (!status && adjust_shared_perm(dst))
	39	return -1;
	40
32276c80	41	return status;
8d5afef0 JH	42	}
	43
	44	static void copy_templates_1(char *path, int baselen,
	45	char *template, int template_baselen,
	46	DIR *dir)
	47	{
	48	struct dirent *de;
	49
	50	/* Note: if ".git/hooks" file exists in the repository being
	51	* re-initialized, /etc/core-git/templates/hooks/update would
	52	* cause git-init-db to fail here. I think this is sane but
	53	* it means that the set of templates we ship by default, along
	54	* with the way the namespace under .git/ is organized, should
	55	* be really carefully chosen.
	56	*/
af6e277c	57	safe_create_dir(path, 1);
8d5afef0 JH	58	while ((de = readdir(dir)) != NULL) {
	59	struct stat st_git, st_template;
	60	int namelen;
	61	int exists = 0;
	62
	63	if (de->d_name[0] == '.')
	64	continue;
	65	namelen = strlen(de->d_name);
	66	if ((PATH_MAX <= baselen + namelen) \|\|
	67	(PATH_MAX <= template_baselen + namelen))
	68	die("insanely long template name %s", de->d_name);
	69	memcpy(path + baselen, de->d_name, namelen+1);
	70	memcpy(template + template_baselen, de->d_name, namelen+1);
	71	if (lstat(path, &st_git)) {
	72	if (errno != ENOENT)
	73	die("cannot stat %s", path);
	74	}
	75	else
	76	exists = 1;
	77
	78	if (lstat(template, &st_template))
	79	die("cannot stat template %s", template);
	80
	81	if (S_ISDIR(st_template.st_mode)) {
	82	DIR *subdir = opendir(template);
	83	int baselen_sub = baselen + namelen;
	84	int template_baselen_sub = template_baselen + namelen;
	85	if (!subdir)
	86	die("cannot opendir %s", template);
	87	path[baselen_sub++] =
	88	template[template_baselen_sub++] = '/';
	89	path[baselen_sub] =
	90	template[template_baselen_sub] = 0;
	91	copy_templates_1(path, baselen_sub,
	92	template, template_baselen_sub,
	93	subdir);
	94	closedir(subdir);
	95	}
	96	else if (exists)
	97	continue;
	98	else if (S_ISLNK(st_template.st_mode)) {
	99	char lnk[256];
	100	int len;
	101	len = readlink(template, lnk, sizeof(lnk));
	102	if (len < 0)
	103	die("cannot readlink %s", template);
	104	if (sizeof(lnk) <= len)
	105	die("insanely long symlink %s", template);
	106	lnk[len] = 0;
	107	if (symlink(lnk, path))
	108	die("cannot symlink %s %s", lnk, path);
	109	}
	110	else if (S_ISREG(st_template.st_mode)) {
	111	if (copy_file(path, template, st_template.st_mode))
	112	die("cannot copy %s to %s", template, path);
	113	}
	114	else
	115	error("ignoring template %s", template);
	116	}
	117	}
	118
d3af621b	119	static void copy_templates(const char git_dir, int len, char template_dir)
8d5afef0 JH	120	{
	121	char path[PATH_MAX];
	122	char template_path[PATH_MAX];
d3af621b	123	int template_len;
8d5afef0 JH	124	DIR *dir;
8d5afef0 JH	125
8d5afef0	126	if (!template_dir)
d3af621b	127	template_dir = DEFAULT_GIT_TEMPLATE_DIR;
8d5afef0 JH	128	strcpy(template_path, template_dir);
	129	template_len = strlen(template_path);
	130	if (template_path[template_len-1] != '/') {
	131	template_path[template_len++] = '/';
	132	template_path[template_len] = 0;
	133	}
8d5afef0	134	dir = opendir(template_path);
d3af621b JH	135	if (!dir) {
	136	fprintf(stderr, "warning: templates not found %s\n",
	137	template_dir);
8d5afef0	138	return;
d3af621b JH	139	}
d3af621b JH	140
4f629539 JH	141	/* Make sure that template is from the correct vintage */
	142	strcpy(template_path + template_len, "config");
	143	repository_format_version = 0;
	144	git_config_from_file(check_repository_format_version,
	145	template_path);
	146	template_path[template_len] = 0;
	147
	148	if (repository_format_version &&
	149	repository_format_version != GIT_REPO_VERSION) {
	150	fprintf(stderr, "warning: not copying templates of "
	151	"a wrong format version %d from '%s'\n",
	152	repository_format_version,
	153	template_dir);
	154	closedir(dir);
	155	return;
	156	}
	157
d3af621b	158	memcpy(path, git_dir, len);
1f961c19	159	path[len] = 0;
8d5afef0 JH	160	copy_templates_1(path, len,
	161	template_path, template_len,
	162	dir);
	163	closedir(dir);
	164	}
	165
4f629539	166	static void create_default_files(const char git_dir, char template_path)
cad88fdf LT	167	{
	168	unsigned len = strlen(git_dir);
	169	static char path[PATH_MAX];
8098a178	170	unsigned char sha1[20];
4f629539 JH	171	struct stat st1;
4f629539 JH	172	char repo_version_string[10];
cad88fdf LT	173
	174	if (len > sizeof(path)-50)
	175	die("insane git directory %s", git_dir);
	176	memcpy(path, git_dir, len);
	177
	178	if (len && path[len-1] != '/')
	179	path[len++] = '/';
	180
	181	/*
	182	* Create .git/refs/{heads,tags}
	183	*/
	184	strcpy(path + len, "refs");
af6e277c	185	safe_create_dir(path, 1);
cad88fdf	186	strcpy(path + len, "refs/heads");
af6e277c	187	safe_create_dir(path, 1);
cad88fdf	188	strcpy(path + len, "refs/tags");
af6e277c	189	safe_create_dir(path, 1);
cad88fdf	190
4f629539 JH	191	/* First copy the templates -- we might have the default
	192	* config file there, in which case we would want to read
	193	* from it after installing.
	194	*/
	195	path[len] = 0;
	196	copy_templates(path, len, template_path);
	197
	198	git_config(git_default_config);
	199
cad88fdf LT	200	/*
cad88fdf LT	201	* Create the default symlink from ".git/HEAD" to the "master"
8098a178	202	* branch, if it does not exist yet.
cad88fdf LT	203	*/
cad88fdf LT	204	strcpy(path + len, "HEAD");
8098a178 JH	205	if (read_ref(path, sha1) < 0) {
8098a178 JH	206	if (create_symref(path, "refs/heads/master") < 0)
cad88fdf	207	exit(1);
cad88fdf	208	}
e24317b4	209
4f629539 JH	210	/* This forces creation of new config file */
	211	sprintf(repo_version_string, "%d", GIT_REPO_VERSION);
	212	git_config_set("core.repositoryformatversion", repo_version_string);
	213
	214	path[len] = 0;
e24317b4	215	strcpy(path + len, "config");
4f629539 JH	216
	217	/* Check filemode trustability */
	218	if (!lstat(path, &st1)) {
	219	struct stat st2;
	220	int filemode = (!chmod(path, st1.st_mode ^ S_IXUSR) &&
	221	!lstat(path, &st2) &&
	222	st1.st_mode != st2.st_mode);
	223	git_config_set("core.filemode",
	224	filemode ? "true" : "false");
e24317b4	225	}
cad88fdf LT	226	}
cad88fdf LT	227
d3af621b	228	static const char init_db_usage[] =
af6e277c	229	"git-init-db [--template=<template-directory>] [--shared]";
d3af621b	230
4696cb93 ZW	231	/*
	232	* If you want to, you can share the DB area with any number of branches.
	233	* That has advantages: you can save space by sharing all the SHA1 objects.
	234	* On the other hand, it might just make lookup slower and messier. You
	235	* be the judge. The default case is to have one DB per managed directory.
	236	*/
e83c5163 LT	237	int main(int argc, char **argv)
e83c5163 LT	238	{
cad88fdf	239	const char *git_dir;
d19938ab	240	const char *sha1_dir;
d3af621b	241	char path, template_dir = NULL;
19b2860c	242	int len, i;
e83c5163	243
d3af621b JH	244	for (i = 1; i < argc; i++, argv++) {
d3af621b JH	245	char *arg = argv[1];
4a62eaed	246	if (!strncmp(arg, "--template=", 11))
d3af621b	247	template_dir = arg+11;
af6e277c JS	248	else if (!strcmp(arg, "--shared"))
af6e277c JS	249	shared_repository = 1;
d3af621b JH	250	else
	251	die(init_db_usage);
	252	}
	253
cad88fdf LT	254	/*
	255	* Set up the default .git directory contents
	256	*/
a9ab586a	257	git_dir = getenv(GIT_DIR_ENVIRONMENT);
cad88fdf LT	258	if (!git_dir) {
cad88fdf LT	259	git_dir = DEFAULT_GIT_DIR_ENVIRONMENT;
addb315d	260	fprintf(stderr, "defaulting to local storage area\n");
e83c5163	261	}
af6e277c	262	safe_create_dir(git_dir, 0);
4f629539 JH	263
	264	/* Check to see if the repository version is right.
	265	* Note that a newly created repository does not have
	266	* config file, so this will not fail. What we are catching
	267	* is an attempt to reinitialize new repository with an old tool.
	268	*/
	269	check_repository_format();
	270
d3af621b	271	create_default_files(git_dir, template_dir);
cad88fdf LT	272
	273	/*
	274	* And set up the object store.
	275	*/
	276	sha1_dir = get_object_directory();
e83c5163	277	len = strlen(sha1_dir);
812666c8	278	path = xmalloc(len + 40);
e83c5163	279	memcpy(path, sha1_dir, len);
cb126d8d	280
af6e277c	281	safe_create_dir(sha1_dir, 1);
f49fb35d	282	strcpy(path+len, "/pack");
af6e277c	283	safe_create_dir(path, 1);
d57306c7	284	strcpy(path+len, "/info");
af6e277c JS	285	safe_create_dir(path, 1);
	286
	287	if (shared_repository)
	288	git_config_set("core.sharedRepository", "true");
	289
e83c5163 LT	290	return 0;
e83c5163 LT	291	}