[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);
	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 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") < 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 {
		git_config_set("core.bare", "false");
		git_config_set("core.logallrefupdates", "true");
	}
	return reinit;
}

static const char init_db_usage[] =
"git-init [--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;

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

	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 JH	9	#ifndef DEFAULT_GIT_TEMPLATE_DIR
	10	#define DEFAULT_GIT_TEMPLATE_DIR "/usr/share/git-core/templates/"
	11	#endif
	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);
8d5afef0	43	close(fdo);
af6e277c JS	44
	45	if (!status && adjust_shared_perm(dst))
	46	return -1;
	47
32276c80	48	return status;
8d5afef0 JH	49	}
	50
	51	static void copy_templates_1(char *path, int baselen,
	52	char *template, int template_baselen,
	53	DIR *dir)
	54	{
	55	struct dirent *de;
	56
	57	/* Note: if ".git/hooks" file exists in the repository being
	58	* re-initialized, /etc/core-git/templates/hooks/update would
5c94f87e	59	* cause git-init to fail here. I think this is sane but
8d5afef0 JH	60	* it means that the set of templates we ship by default, along
	61	* with the way the namespace under .git/ is organized, should
	62	* be really carefully chosen.
	63	*/
af6e277c	64	safe_create_dir(path, 1);
8d5afef0 JH	65	while ((de = readdir(dir)) != NULL) {
	66	struct stat st_git, st_template;
	67	int namelen;
	68	int exists = 0;
	69
	70	if (de->d_name[0] == '.')
	71	continue;
	72	namelen = strlen(de->d_name);
	73	if ((PATH_MAX <= baselen + namelen) \|\|
	74	(PATH_MAX <= template_baselen + namelen))
	75	die("insanely long template name %s", de->d_name);
	76	memcpy(path + baselen, de->d_name, namelen+1);
	77	memcpy(template + template_baselen, de->d_name, namelen+1);
	78	if (lstat(path, &st_git)) {
	79	if (errno != ENOENT)
	80	die("cannot stat %s", path);
	81	}
	82	else
	83	exists = 1;
	84
	85	if (lstat(template, &st_template))
	86	die("cannot stat template %s", template);
	87
	88	if (S_ISDIR(st_template.st_mode)) {
	89	DIR *subdir = opendir(template);
	90	int baselen_sub = baselen + namelen;
	91	int template_baselen_sub = template_baselen + namelen;
	92	if (!subdir)
	93	die("cannot opendir %s", template);
	94	path[baselen_sub++] =
	95	template[template_baselen_sub++] = '/';
	96	path[baselen_sub] =
	97	template[template_baselen_sub] = 0;
	98	copy_templates_1(path, baselen_sub,
	99	template, template_baselen_sub,
	100	subdir);
	101	closedir(subdir);
	102	}
	103	else if (exists)
	104	continue;
	105	else if (S_ISLNK(st_template.st_mode)) {
	106	char lnk[256];
	107	int len;
	108	len = readlink(template, lnk, sizeof(lnk));
	109	if (len < 0)
	110	die("cannot readlink %s", template);
	111	if (sizeof(lnk) <= len)
	112	die("insanely long symlink %s", template);
	113	lnk[len] = 0;
	114	if (symlink(lnk, path))
	115	die("cannot symlink %s %s", lnk, path);
	116	}
	117	else if (S_ISREG(st_template.st_mode)) {
	118	if (copy_file(path, template, st_template.st_mode))
	119	die("cannot copy %s to %s", template, path);
	120	}
	121	else
	122	error("ignoring template %s", template);
	123	}
	124	}
	125
c3c8835f	126	static void copy_templates(const char git_dir, int len, const char template_dir)
8d5afef0 JH	127	{
	128	char path[PATH_MAX];
	129	char template_path[PATH_MAX];
d3af621b	130	int template_len;
8d5afef0 JH	131	DIR *dir;
8d5afef0 JH	132
8683a45d	133	if (!template_dir) {
d4ebc36c	134	template_dir = getenv(TEMPLATE_DIR_ENVIRONMENT);
8683a45d JS	135	if (!template_dir)
	136	template_dir = DEFAULT_GIT_TEMPLATE_DIR;
	137	}
8d5afef0 JH	138	strcpy(template_path, template_dir);
	139	template_len = strlen(template_path);
	140	if (template_path[template_len-1] != '/') {
	141	template_path[template_len++] = '/';
	142	template_path[template_len] = 0;
	143	}
8d5afef0	144	dir = opendir(template_path);
d3af621b JH	145	if (!dir) {
	146	fprintf(stderr, "warning: templates not found %s\n",
	147	template_dir);
8d5afef0	148	return;
d3af621b JH	149	}
d3af621b JH	150
4f629539 JH	151	/* Make sure that template is from the correct vintage */
	152	strcpy(template_path + template_len, "config");
	153	repository_format_version = 0;
	154	git_config_from_file(check_repository_format_version,
	155	template_path);
	156	template_path[template_len] = 0;
	157
	158	if (repository_format_version &&
	159	repository_format_version != GIT_REPO_VERSION) {
	160	fprintf(stderr, "warning: not copying templates of "
	161	"a wrong format version %d from '%s'\n",
	162	repository_format_version,
	163	template_dir);
	164	closedir(dir);
	165	return;
	166	}
	167
d3af621b	168	memcpy(path, git_dir, len);
1f961c19	169	path[len] = 0;
8d5afef0 JH	170	copy_templates_1(path, len,
	171	template_path, template_len,
	172	dir);
	173	closedir(dir);
	174	}
	175
ef0a89a6	176	static int create_default_files(const char git_dir, const char template_path)
cad88fdf LT	177	{
	178	unsigned len = strlen(git_dir);
	179	static char path[PATH_MAX];
8098a178	180	unsigned char sha1[20];
4f629539 JH	181	struct stat st1;
4f629539 JH	182	char repo_version_string[10];
ef0a89a6	183	int reinit;
c869753e	184	int filemode;
cad88fdf LT	185
	186	if (len > sizeof(path)-50)
	187	die("insane git directory %s", git_dir);
	188	memcpy(path, git_dir, len);
	189
	190	if (len && path[len-1] != '/')
	191	path[len++] = '/';
	192
	193	/*
	194	* Create .git/refs/{heads,tags}
	195	*/
	196	strcpy(path + len, "refs");
af6e277c	197	safe_create_dir(path, 1);
cad88fdf	198	strcpy(path + len, "refs/heads");
af6e277c	199	safe_create_dir(path, 1);
cad88fdf	200	strcpy(path + len, "refs/tags");
af6e277c	201	safe_create_dir(path, 1);
cad88fdf	202
4f629539 JH	203	/* First copy the templates -- we might have the default
	204	* config file there, in which case we would want to read
	205	* from it after installing.
	206	*/
	207	path[len] = 0;
	208	copy_templates(path, len, template_path);
	209
	210	git_config(git_default_config);
	211
138086a7 JH	212	/*
	213	* We would have created the above under user's umask -- under
	214	* shared-repository settings, we would need to fix them up.
	215	*/
	216	if (shared_repository) {
	217	path[len] = 0;
	218	adjust_shared_perm(path);
	219	strcpy(path + len, "refs");
	220	adjust_shared_perm(path);
	221	strcpy(path + len, "refs/heads");
	222	adjust_shared_perm(path);
	223	strcpy(path + len, "refs/tags");
	224	adjust_shared_perm(path);
	225	}
	226
cad88fdf LT	227	/*
cad88fdf LT	228	* Create the default symlink from ".git/HEAD" to the "master"
8098a178	229	* branch, if it does not exist yet.
cad88fdf LT	230	*/
cad88fdf LT	231	strcpy(path + len, "HEAD");
ef0a89a6 SP	232	reinit = !read_ref("HEAD", sha1);
ef0a89a6 SP	233	if (!reinit) {
ed378ec7	234	if (create_symref("HEAD", "refs/heads/master") < 0)
cad88fdf	235	exit(1);
cad88fdf	236	}
e24317b4	237
4f629539 JH	238	/* This forces creation of new config file */
	239	sprintf(repo_version_string, "%d", GIT_REPO_VERSION);
	240	git_config_set("core.repositoryformatversion", repo_version_string);
	241
	242	path[len] = 0;
e24317b4	243	strcpy(path + len, "config");
4f629539 JH	244
4f629539 JH	245	/* Check filemode trustability */
c869753e SP	246	filemode = TEST_FILEMODE;
c869753e SP	247	if (TEST_FILEMODE && !lstat(path, &st1)) {
4f629539	248	struct stat st2;
c869753e	249	filemode = (!chmod(path, st1.st_mode ^ S_IXUSR) &&
4f629539 JH	250	!lstat(path, &st2) &&
4f629539 JH	251	st1.st_mode != st2.st_mode);
e24317b4	252	}
c869753e	253	git_config_set("core.filemode", filemode ? "true" : "false");
ef0a89a6	254
7d1864ce JH	255	if (is_bare_repository()) {
	256	git_config_set("core.bare", "true");
	257	}
	258	else {
	259	git_config_set("core.bare", "false");
0bee5918	260	git_config_set("core.logallrefupdates", "true");
7d1864ce	261	}
ef0a89a6	262	return reinit;
cad88fdf LT	263	}
cad88fdf LT	264
d3af621b	265	static const char init_db_usage[] =
515377ea	266	"git-init [--template=<template-directory>] [--shared]";
d3af621b	267
4696cb93 ZW	268	/*
	269	* If you want to, you can share the DB area with any number of branches.
	270	* That has advantages: you can save space by sharing all the SHA1 objects.
	271	* On the other hand, it might just make lookup slower and messier. You
	272	* be the judge. The default case is to have one DB per managed directory.
	273	*/
a633fca0	274	int cmd_init_db(int argc, const char *argv, const char prefix)
e83c5163	275	{
cad88fdf	276	const char *git_dir;
d19938ab	277	const char *sha1_dir;
c3c8835f TH	278	const char *template_dir = NULL;
c3c8835f TH	279	char *path;
ef0a89a6	280	int len, i, reinit;
e83c5163	281
d3af621b	282	for (i = 1; i < argc; i++, argv++) {
c3c8835f	283	const char *arg = argv[1];
4a62eaed	284	if (!strncmp(arg, "--template=", 11))
d3af621b	285	template_dir = arg+11;
af6e277c	286	else if (!strcmp(arg, "--shared"))
94df2506 JH	287	shared_repository = PERM_GROUP;
	288	else if (!strncmp(arg, "--shared=", 9))
	289	shared_repository = git_config_perm("arg", arg+9);
d3af621b	290	else
8cdf3364	291	usage(init_db_usage);
d3af621b JH	292	}
d3af621b JH	293
cad88fdf LT	294	/*
	295	* Set up the default .git directory contents
	296	*/
a9ab586a	297	git_dir = getenv(GIT_DIR_ENVIRONMENT);
ef0a89a6	298	if (!git_dir)
cad88fdf	299	git_dir = DEFAULT_GIT_DIR_ENVIRONMENT;
af6e277c	300	safe_create_dir(git_dir, 0);
4f629539 JH	301
	302	/* Check to see if the repository version is right.
	303	* Note that a newly created repository does not have
	304	* config file, so this will not fail. What we are catching
	305	* is an attempt to reinitialize new repository with an old tool.
	306	*/
	307	check_repository_format();
	308
ef0a89a6	309	reinit = create_default_files(git_dir, template_dir);
cad88fdf LT	310
	311	/*
	312	* And set up the object store.
	313	*/
	314	sha1_dir = get_object_directory();
e83c5163	315	len = strlen(sha1_dir);
812666c8	316	path = xmalloc(len + 40);
e83c5163	317	memcpy(path, sha1_dir, len);
cb126d8d	318
af6e277c	319	safe_create_dir(sha1_dir, 1);
f49fb35d	320	strcpy(path+len, "/pack");
af6e277c	321	safe_create_dir(path, 1);
d57306c7	322	strcpy(path+len, "/info");
af6e277c JS	323	safe_create_dir(path, 1);
af6e277c JS	324
94df2506 JH	325	if (shared_repository) {
	326	char buf[10];
	327	/* We do not spell "group" and such, so that
	328	* the configuration can be read by older version
	329	* of git.
	330	*/
	331	sprintf(buf, "%d", shared_repository);
	332	git_config_set("core.sharedrepository", buf);
11031d7e	333	git_config_set("receive.denyNonFastforwards", "true");
94df2506	334	}
af6e277c	335
ef0a89a6 SP	336	printf("%s%s Git repository in %s/\n",
	337	reinit ? "Reinitialized existing" : "Initialized empty",
	338	shared_repository ? " shared" : "",
	339	git_dir);
	340
e83c5163 LT	341	return 0;
e83c5163 LT	342	}