[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

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, 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;

	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 */
	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");
	}

	/* Enable logAllRefUpdates if a working tree is attached */
	if (!is_bare_git_dir(git_dir))
		git_config_set("core.logallrefupdates", "true");
	return reinit;
}

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 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
af6e277c	13	static void safe_create_dir(const char *dir, int share)
cb126d8d	14	{
f312de01	15	if (mkdir(dir, 0777) < 0) {
cb126d8d ZW	16	if (errno != EEXIST) {
	17	perror(dir);
	18	exit(1);
	19	}
	20	}
af6e277c JS	21	else if (share && adjust_shared_perm(dir))
af6e277c JS	22	die("Could not make %s writable by group\n", dir);
cb126d8d ZW	23	}
cb126d8d ZW	24
8d5afef0 JH	25	static int copy_file(const char dst, const char src, int mode)
8d5afef0 JH	26	{
32276c80	27	int fdi, fdo, status;
8d5afef0 JH	28
	29	mode = (mode & 0111) ? 0777 : 0666;
	30	if ((fdi = open(src, O_RDONLY)) < 0)
	31	return fdi;
	32	if ((fdo = open(dst, O_WRONLY \| O_CREAT \| O_EXCL, mode)) < 0) {
	33	close(fdi);
	34	return fdo;
	35	}
32276c80	36	status = copy_fd(fdi, fdo);
8d5afef0	37	close(fdo);
af6e277c JS	38
	39	if (!status && adjust_shared_perm(dst))
	40	return -1;
	41
32276c80	42	return status;
8d5afef0 JH	43	}
	44
	45	static void copy_templates_1(char *path, int baselen,
	46	char *template, int template_baselen,
	47	DIR *dir)
	48	{
	49	struct dirent *de;
	50
	51	/* Note: if ".git/hooks" file exists in the repository being
	52	* re-initialized, /etc/core-git/templates/hooks/update would
	53	* cause git-init-db to fail here. I think this is sane but
	54	* it means that the set of templates we ship by default, along
	55	* with the way the namespace under .git/ is organized, should
	56	* be really carefully chosen.
	57	*/
af6e277c	58	safe_create_dir(path, 1);
8d5afef0 JH	59	while ((de = readdir(dir)) != NULL) {
	60	struct stat st_git, st_template;
	61	int namelen;
	62	int exists = 0;
	63
	64	if (de->d_name[0] == '.')
	65	continue;
	66	namelen = strlen(de->d_name);
	67	if ((PATH_MAX <= baselen + namelen) \|\|
	68	(PATH_MAX <= template_baselen + namelen))
	69	die("insanely long template name %s", de->d_name);
	70	memcpy(path + baselen, de->d_name, namelen+1);
	71	memcpy(template + template_baselen, de->d_name, namelen+1);
	72	if (lstat(path, &st_git)) {
	73	if (errno != ENOENT)
	74	die("cannot stat %s", path);
	75	}
	76	else
	77	exists = 1;
	78
	79	if (lstat(template, &st_template))
	80	die("cannot stat template %s", template);
	81
	82	if (S_ISDIR(st_template.st_mode)) {
	83	DIR *subdir = opendir(template);
	84	int baselen_sub = baselen + namelen;
	85	int template_baselen_sub = template_baselen + namelen;
	86	if (!subdir)
	87	die("cannot opendir %s", template);
	88	path[baselen_sub++] =
	89	template[template_baselen_sub++] = '/';
	90	path[baselen_sub] =
	91	template[template_baselen_sub] = 0;
	92	copy_templates_1(path, baselen_sub,
	93	template, template_baselen_sub,
	94	subdir);
	95	closedir(subdir);
	96	}
	97	else if (exists)
	98	continue;
	99	else if (S_ISLNK(st_template.st_mode)) {
	100	char lnk[256];
	101	int len;
	102	len = readlink(template, lnk, sizeof(lnk));
	103	if (len < 0)
	104	die("cannot readlink %s", template);
	105	if (sizeof(lnk) <= len)
	106	die("insanely long symlink %s", template);
	107	lnk[len] = 0;
	108	if (symlink(lnk, path))
	109	die("cannot symlink %s %s", lnk, path);
	110	}
	111	else if (S_ISREG(st_template.st_mode)) {
	112	if (copy_file(path, template, st_template.st_mode))
	113	die("cannot copy %s to %s", template, path);
	114	}
	115	else
	116	error("ignoring template %s", template);
	117	}
	118	}
	119
c3c8835f	120	static void copy_templates(const char git_dir, int len, const char template_dir)
8d5afef0 JH	121	{
	122	char path[PATH_MAX];
	123	char template_path[PATH_MAX];
d3af621b	124	int template_len;
8d5afef0 JH	125	DIR *dir;
8d5afef0 JH	126
8683a45d	127	if (!template_dir) {
d4ebc36c	128	template_dir = getenv(TEMPLATE_DIR_ENVIRONMENT);
8683a45d JS	129	if (!template_dir)
	130	template_dir = DEFAULT_GIT_TEMPLATE_DIR;
	131	}
8d5afef0 JH	132	strcpy(template_path, template_dir);
	133	template_len = strlen(template_path);
	134	if (template_path[template_len-1] != '/') {
	135	template_path[template_len++] = '/';
	136	template_path[template_len] = 0;
	137	}
8d5afef0	138	dir = opendir(template_path);
d3af621b JH	139	if (!dir) {
	140	fprintf(stderr, "warning: templates not found %s\n",
	141	template_dir);
8d5afef0	142	return;
d3af621b JH	143	}
d3af621b JH	144
4f629539 JH	145	/* Make sure that template is from the correct vintage */
	146	strcpy(template_path + template_len, "config");
	147	repository_format_version = 0;
	148	git_config_from_file(check_repository_format_version,
	149	template_path);
	150	template_path[template_len] = 0;
	151
	152	if (repository_format_version &&
	153	repository_format_version != GIT_REPO_VERSION) {
	154	fprintf(stderr, "warning: not copying templates of "
	155	"a wrong format version %d from '%s'\n",
	156	repository_format_version,
	157	template_dir);
	158	closedir(dir);
	159	return;
	160	}
	161
d3af621b	162	memcpy(path, git_dir, len);
1f961c19	163	path[len] = 0;
8d5afef0 JH	164	copy_templates_1(path, len,
	165	template_path, template_len,
	166	dir);
	167	closedir(dir);
	168	}
	169
ef0a89a6	170	static int create_default_files(const char git_dir, const char template_path)
cad88fdf LT	171	{
	172	unsigned len = strlen(git_dir);
	173	static char path[PATH_MAX];
8098a178	174	unsigned char sha1[20];
4f629539 JH	175	struct stat st1;
4f629539 JH	176	char repo_version_string[10];
ef0a89a6	177	int reinit;
cad88fdf LT	178
	179	if (len > sizeof(path)-50)
	180	die("insane git directory %s", git_dir);
	181	memcpy(path, git_dir, len);
	182
	183	if (len && path[len-1] != '/')
	184	path[len++] = '/';
	185
	186	/*
	187	* Create .git/refs/{heads,tags}
	188	*/
	189	strcpy(path + len, "refs");
af6e277c	190	safe_create_dir(path, 1);
cad88fdf	191	strcpy(path + len, "refs/heads");
af6e277c	192	safe_create_dir(path, 1);
cad88fdf	193	strcpy(path + len, "refs/tags");
af6e277c	194	safe_create_dir(path, 1);
cad88fdf	195
4f629539 JH	196	/* First copy the templates -- we might have the default
	197	* config file there, in which case we would want to read
	198	* from it after installing.
	199	*/
	200	path[len] = 0;
	201	copy_templates(path, len, template_path);
	202
	203	git_config(git_default_config);
	204
138086a7 JH	205	/*
	206	* We would have created the above under user's umask -- under
	207	* shared-repository settings, we would need to fix them up.
	208	*/
	209	if (shared_repository) {
	210	path[len] = 0;
	211	adjust_shared_perm(path);
	212	strcpy(path + len, "refs");
	213	adjust_shared_perm(path);
	214	strcpy(path + len, "refs/heads");
	215	adjust_shared_perm(path);
	216	strcpy(path + len, "refs/tags");
	217	adjust_shared_perm(path);
	218	}
	219
cad88fdf LT	220	/*
cad88fdf LT	221	* Create the default symlink from ".git/HEAD" to the "master"
8098a178	222	* branch, if it does not exist yet.
cad88fdf LT	223	*/
cad88fdf LT	224	strcpy(path + len, "HEAD");
ef0a89a6 SP	225	reinit = !read_ref("HEAD", sha1);
ef0a89a6 SP	226	if (!reinit) {
ed378ec7	227	if (create_symref("HEAD", "refs/heads/master") < 0)
cad88fdf	228	exit(1);
cad88fdf	229	}
e24317b4	230
4f629539 JH	231	/* This forces creation of new config file */
	232	sprintf(repo_version_string, "%d", GIT_REPO_VERSION);
	233	git_config_set("core.repositoryformatversion", repo_version_string);
	234
	235	path[len] = 0;
e24317b4	236	strcpy(path + len, "config");
4f629539 JH	237
	238	/* Check filemode trustability */
	239	if (!lstat(path, &st1)) {
	240	struct stat st2;
	241	int filemode = (!chmod(path, st1.st_mode ^ S_IXUSR) &&
	242	!lstat(path, &st2) &&
	243	st1.st_mode != st2.st_mode);
	244	git_config_set("core.filemode",
	245	filemode ? "true" : "false");
e24317b4	246	}
ef0a89a6	247
0bee5918 SP	248	/* Enable logAllRefUpdates if a working tree is attached */
	249	if (!is_bare_git_dir(git_dir))
	250	git_config_set("core.logallrefupdates", "true");
ef0a89a6	251	return reinit;
cad88fdf LT	252	}
cad88fdf LT	253
d3af621b	254	static const char init_db_usage[] =
af6e277c	255	"git-init-db [--template=<template-directory>] [--shared]";
d3af621b	256
4696cb93 ZW	257	/*
	258	* If you want to, you can share the DB area with any number of branches.
	259	* That has advantages: you can save space by sharing all the SHA1 objects.
	260	* On the other hand, it might just make lookup slower and messier. You
	261	* be the judge. The default case is to have one DB per managed directory.
	262	*/
a633fca0	263	int cmd_init_db(int argc, const char *argv, const char prefix)
e83c5163	264	{
cad88fdf	265	const char *git_dir;
d19938ab	266	const char *sha1_dir;
c3c8835f TH	267	const char *template_dir = NULL;
c3c8835f TH	268	char *path;
ef0a89a6	269	int len, i, reinit;
e83c5163	270
d3af621b	271	for (i = 1; i < argc; i++, argv++) {
c3c8835f	272	const char *arg = argv[1];
4a62eaed	273	if (!strncmp(arg, "--template=", 11))
d3af621b	274	template_dir = arg+11;
af6e277c	275	else if (!strcmp(arg, "--shared"))
94df2506 JH	276	shared_repository = PERM_GROUP;
	277	else if (!strncmp(arg, "--shared=", 9))
	278	shared_repository = git_config_perm("arg", arg+9);
d3af621b	279	else
8cdf3364	280	usage(init_db_usage);
d3af621b JH	281	}
d3af621b JH	282
cad88fdf LT	283	/*
	284	* Set up the default .git directory contents
	285	*/
a9ab586a	286	git_dir = getenv(GIT_DIR_ENVIRONMENT);
ef0a89a6	287	if (!git_dir)
cad88fdf	288	git_dir = DEFAULT_GIT_DIR_ENVIRONMENT;
af6e277c	289	safe_create_dir(git_dir, 0);
4f629539 JH	290
	291	/* Check to see if the repository version is right.
	292	* Note that a newly created repository does not have
	293	* config file, so this will not fail. What we are catching
	294	* is an attempt to reinitialize new repository with an old tool.
	295	*/
	296	check_repository_format();
	297
ef0a89a6	298	reinit = create_default_files(git_dir, template_dir);
cad88fdf LT	299
	300	/*
	301	* And set up the object store.
	302	*/
	303	sha1_dir = get_object_directory();
e83c5163	304	len = strlen(sha1_dir);
812666c8	305	path = xmalloc(len + 40);
e83c5163	306	memcpy(path, sha1_dir, len);
cb126d8d	307
af6e277c	308	safe_create_dir(sha1_dir, 1);
f49fb35d	309	strcpy(path+len, "/pack");
af6e277c	310	safe_create_dir(path, 1);
d57306c7	311	strcpy(path+len, "/info");
af6e277c JS	312	safe_create_dir(path, 1);
af6e277c JS	313
94df2506 JH	314	if (shared_repository) {
	315	char buf[10];
	316	/* We do not spell "group" and such, so that
	317	* the configuration can be read by older version
	318	* of git.
	319	*/
	320	sprintf(buf, "%d", shared_repository);
	321	git_config_set("core.sharedrepository", buf);
11031d7e	322	git_config_set("receive.denyNonFastforwards", "true");
94df2506	323	}
af6e277c	324
ef0a89a6 SP	325	printf("%s%s Git repository in %s/\n",
	326	reinit ? "Reinitialized existing" : "Initialized empty",
	327	shared_repository ? " shared" : "",
	328	git_dir);
	329
e83c5163 LT	330	return 0;
e83c5163 LT	331	}