2 * GIT - The information manager from hell
4 * Copyright (C) Linus Torvalds, 2005
11 #include "parse-options.h"
13 #ifndef DEFAULT_GIT_TEMPLATE_DIR
14 #define DEFAULT_GIT_TEMPLATE_DIR "/usr/share/git-core/templates"
17 #ifdef NO_TRUSTABLE_FILEMODE
18 #define TEST_FILEMODE 0
20 #define TEST_FILEMODE 1
23 static int init_is_bare_repository = 0;
24 static int init_shared_repository = -1;
25 static const char *init_db_template_dir;
27 static void copy_templates_1(struct strbuf *path, struct strbuf *template_path,
30 size_t path_baselen = path->len;
31 size_t template_baselen = template_path->len;
34 /* Note: if ".git/hooks" file exists in the repository being
35 * re-initialized, /etc/core-git/templates/hooks/update would
36 * cause "git init" to fail here. I think this is sane but
37 * it means that the set of templates we ship by default, along
38 * with the way the namespace under .git/ is organized, should
39 * be really carefully chosen.
41 safe_create_dir(path->buf, 1);
42 while ((de = readdir(dir)) != NULL) {
43 struct stat st_git, st_template;
46 strbuf_setlen(path, path_baselen);
47 strbuf_setlen(template_path, template_baselen);
49 if (de->d_name[0] == '.')
51 strbuf_addstr(path, de->d_name);
52 strbuf_addstr(template_path, de->d_name);
53 if (lstat(path->buf, &st_git)) {
55 die_errno(_("cannot stat '%s'"), path->buf);
60 if (lstat(template_path->buf, &st_template))
61 die_errno(_("cannot stat template '%s'"), template_path->buf);
63 if (S_ISDIR(st_template.st_mode)) {
64 DIR *subdir = opendir(template_path->buf);
66 die_errno(_("cannot opendir '%s'"), template_path->buf);
67 strbuf_addch(path, '/');
68 strbuf_addch(template_path, '/');
69 copy_templates_1(path, template_path, subdir);
74 else if (S_ISLNK(st_template.st_mode)) {
75 struct strbuf lnk = STRBUF_INIT;
76 if (strbuf_readlink(&lnk, template_path->buf,
77 st_template.st_size) < 0)
78 die_errno(_("cannot readlink '%s'"), template_path->buf);
79 if (symlink(lnk.buf, path->buf))
80 die_errno(_("cannot symlink '%s' '%s'"),
84 else if (S_ISREG(st_template.st_mode)) {
85 if (copy_file(path->buf, template_path->buf, st_template.st_mode))
86 die_errno(_("cannot copy '%s' to '%s'"),
87 template_path->buf, path->buf);
90 error(_("ignoring template %s"), template_path->buf);
94 static void copy_templates(const char *template_dir)
96 struct strbuf path = STRBUF_INIT;
97 struct strbuf template_path = STRBUF_INIT;
99 struct repository_format template_format = REPOSITORY_FORMAT_INIT;
100 struct strbuf err = STRBUF_INIT;
102 char *to_free = NULL;
105 template_dir = getenv(TEMPLATE_DIR_ENVIRONMENT);
107 template_dir = init_db_template_dir;
109 template_dir = to_free = system_path(DEFAULT_GIT_TEMPLATE_DIR);
110 if (!template_dir[0]) {
115 strbuf_addstr(&template_path, template_dir);
116 strbuf_complete(&template_path, '/');
117 template_len = template_path.len;
119 dir = opendir(template_path.buf);
121 warning(_("templates not found in %s"), template_dir);
125 /* Make sure that template is from the correct vintage */
126 strbuf_addstr(&template_path, "config");
127 read_repository_format(&template_format, template_path.buf);
128 strbuf_setlen(&template_path, template_len);
131 * No mention of version at all is OK, but anything else should be
134 if (template_format.version >= 0 &&
135 verify_repository_format(&template_format, &err) < 0) {
136 warning(_("not copying templates from '%s': %s"),
137 template_dir, err.buf);
138 strbuf_release(&err);
139 goto close_free_return;
142 strbuf_addstr(&path, get_git_common_dir());
143 strbuf_complete(&path, '/');
144 copy_templates_1(&path, &template_path, dir);
149 strbuf_release(&path);
150 strbuf_release(&template_path);
151 clear_repository_format(&template_format);
154 static int git_init_db_config(const char *k, const char *v, void *cb)
156 if (!strcmp(k, "init.templatedir"))
157 return git_config_pathname(&init_db_template_dir, k, v);
159 if (starts_with(k, "core."))
160 return platform_core_config(k, v, cb);
166 * If the git_dir is not directly inside the working tree, then git will not
167 * find it by default, and we need to set the worktree explicitly.
169 static int needs_work_tree_config(const char *git_dir, const char *work_tree)
171 if (!strcmp(work_tree, "/") && !strcmp(git_dir, "/.git"))
173 if (skip_prefix(git_dir, work_tree, &git_dir) &&
174 !strcmp(git_dir, "/.git"))
179 static int create_default_files(const char *template_path,
180 const char *original_git_dir)
183 struct strbuf buf = STRBUF_INIT;
185 char repo_version_string[10];
189 struct strbuf err = STRBUF_INIT;
191 /* Just look for `init.templatedir` */
192 init_db_template_dir = NULL; /* re-set in case it was set before */
193 git_config(git_init_db_config, NULL);
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.
200 * Before reading that config, we also need to clear out any cached
201 * values (since we've just potentially changed what's available on
204 copy_templates(template_path);
206 reset_shared_repository();
207 git_config(git_default_config, NULL);
210 * We must make sure command-line options continue to override any
211 * values we might have just re-read from the config.
213 is_bare_repository_cfg = init_is_bare_repository;
214 if (init_shared_repository != -1)
215 set_shared_repository(init_shared_repository);
218 * We would have created the above under user's umask -- under
219 * shared-repository settings, we would need to fix them up.
221 if (get_shared_repository()) {
222 adjust_shared_perm(get_git_dir());
226 * We need to create a "refs" dir in any case so that older
227 * versions of git can tell that this is a repository.
229 safe_create_dir(git_path("refs"), 1);
230 adjust_shared_perm(git_path("refs"));
232 if (refs_init_db(&err))
233 die("failed to set up refs db: %s", err.buf);
236 * Create the default symlink from ".git/HEAD" to the "master"
237 * branch, if it does not exist yet.
239 path = git_path_buf(&buf, "HEAD");
240 reinit = (!access(path, R_OK)
241 || readlink(path, junk, sizeof(junk)-1) != -1);
243 if (create_symref("HEAD", "refs/heads/master", NULL) < 0)
247 /* This forces creation of new config file */
248 xsnprintf(repo_version_string, sizeof(repo_version_string),
249 "%d", GIT_REPO_VERSION);
250 git_config_set("core.repositoryformatversion", repo_version_string);
252 /* Check filemode trustability */
253 path = git_path_buf(&buf, "config");
254 filemode = TEST_FILEMODE;
255 if (TEST_FILEMODE && !lstat(path, &st1)) {
257 filemode = (!chmod(path, st1.st_mode ^ S_IXUSR) &&
258 !lstat(path, &st2) &&
259 st1.st_mode != st2.st_mode &&
260 !chmod(path, st1.st_mode));
261 if (filemode && !reinit && (st1.st_mode & S_IXUSR))
264 git_config_set("core.filemode", filemode ? "true" : "false");
266 if (is_bare_repository())
267 git_config_set("core.bare", "true");
269 const char *work_tree = get_git_work_tree();
270 git_config_set("core.bare", "false");
271 /* allow template config file to override the default */
272 if (log_all_ref_updates == LOG_REFS_UNSET)
273 git_config_set("core.logallrefupdates", "true");
274 if (needs_work_tree_config(original_git_dir, work_tree))
275 git_config_set("core.worktree", work_tree);
279 /* Check if symlink is supported in the work tree */
280 path = git_path_buf(&buf, "tXXXXXX");
281 if (!close(xmkstemp(path)) &&
283 !symlink("testing", path) &&
284 !lstat(path, &st1) &&
285 S_ISLNK(st1.st_mode))
286 unlink(path); /* good */
288 git_config_set("core.symlinks", "false");
290 /* Check if the filesystem is case-insensitive */
291 path = git_path_buf(&buf, "CoNfIg");
292 if (!access(path, F_OK))
293 git_config_set("core.ignorecase", "true");
294 probe_utf8_pathname_composition();
297 strbuf_release(&buf);
301 static void create_object_directory(void)
303 struct strbuf path = STRBUF_INIT;
306 strbuf_addstr(&path, get_object_directory());
309 safe_create_dir(path.buf, 1);
311 strbuf_setlen(&path, baselen);
312 strbuf_addstr(&path, "/pack");
313 safe_create_dir(path.buf, 1);
315 strbuf_setlen(&path, baselen);
316 strbuf_addstr(&path, "/info");
317 safe_create_dir(path.buf, 1);
319 strbuf_release(&path);
322 static void separate_git_dir(const char *git_dir, const char *git_link)
326 if (!stat(git_link, &st)) {
329 if (S_ISREG(st.st_mode))
330 src = read_gitfile(git_link);
331 else if (S_ISDIR(st.st_mode))
334 die(_("unable to handle file type %d"), (int)st.st_mode);
336 if (rename(src, git_dir))
337 die_errno(_("unable to move %s to %s"), src, git_dir);
340 write_file(git_link, "gitdir: %s", git_dir);
343 int init_db(const char *git_dir, const char *real_git_dir,
344 const char *template_dir, unsigned int flags)
347 int exist_ok = flags & INIT_DB_EXIST_OK;
348 char *original_git_dir = real_pathdup(git_dir, 1);
353 if (!exist_ok && !stat(git_dir, &st))
354 die(_("%s already exists"), git_dir);
356 if (!exist_ok && !stat(real_git_dir, &st))
357 die(_("%s already exists"), real_git_dir);
359 set_git_dir(real_path(real_git_dir));
360 git_dir = get_git_dir();
361 separate_git_dir(git_dir, original_git_dir);
364 set_git_dir(real_path(git_dir));
365 git_dir = get_git_dir();
367 startup_info->have_repository = 1;
369 /* Just look for `core.hidedotfiles` */
370 git_config(git_init_db_config, NULL);
372 safe_create_dir(git_dir, 0);
374 init_is_bare_repository = is_bare_repository();
376 /* Check to see if the repository version is right.
377 * Note that a newly created repository does not have
378 * config file, so this will not fail. What we are catching
379 * is an attempt to reinitialize new repository with an old tool.
381 check_repository_format();
383 reinit = create_default_files(template_dir, original_git_dir);
385 create_object_directory();
387 if (get_shared_repository()) {
389 /* We do not spell "group" and such, so that
390 * the configuration can be read by older version
391 * of git. Note, we use octal numbers for new share modes,
392 * and compatibility values for PERM_GROUP and
395 if (get_shared_repository() < 0)
396 /* force to the mode value */
397 xsnprintf(buf, sizeof(buf), "0%o", -get_shared_repository());
398 else if (get_shared_repository() == PERM_GROUP)
399 xsnprintf(buf, sizeof(buf), "%d", OLD_PERM_GROUP);
400 else if (get_shared_repository() == PERM_EVERYBODY)
401 xsnprintf(buf, sizeof(buf), "%d", OLD_PERM_EVERYBODY);
403 BUG("invalid value for shared_repository");
404 git_config_set("core.sharedrepository", buf);
405 git_config_set("receive.denyNonFastforwards", "true");
408 if (!(flags & INIT_DB_QUIET)) {
409 int len = strlen(git_dir);
412 printf(get_shared_repository()
413 ? _("Reinitialized existing shared Git repository in %s%s\n")
414 : _("Reinitialized existing Git repository in %s%s\n"),
415 git_dir, len && git_dir[len-1] != '/' ? "/" : "");
417 printf(get_shared_repository()
418 ? _("Initialized empty shared Git repository in %s%s\n")
419 : _("Initialized empty Git repository in %s%s\n"),
420 git_dir, len && git_dir[len-1] != '/' ? "/" : "");
423 free(original_git_dir);
427 static int guess_repository_type(const char *git_dir)
434 * "GIT_DIR=. git init" is always bare.
435 * "GIT_DIR=`pwd` git init" too.
437 if (!strcmp(".", git_dir))
440 cwd_is_git_dir = !strcmp(git_dir, cwd);
445 * "GIT_DIR=.git or GIT_DIR=something/.git is usually not.
447 if (!strcmp(git_dir, ".git"))
449 slash = strrchr(git_dir, '/');
450 if (slash && !strcmp(slash, "/.git"))
454 * Otherwise it is often bare. At this point
455 * we are just guessing.
460 static int shared_callback(const struct option *opt, const char *arg, int unset)
462 BUG_ON_OPT_NEG(unset);
463 *((int *) opt->value) = (arg) ? git_config_perm("arg", arg) : PERM_GROUP;
467 static const char *const init_db_usage[] = {
468 N_("git init [-q | --quiet] [--bare] [--template=<template-directory>] [--shared[=<permissions>]] [<directory>]"),
473 * If you want to, you can share the DB area with any number of branches.
474 * That has advantages: you can save space by sharing all the SHA1 objects.
475 * On the other hand, it might just make lookup slower and messier. You
476 * be the judge. The default case is to have one DB per managed directory.
478 int cmd_init_db(int argc, const char **argv, const char *prefix)
481 const char *real_git_dir = NULL;
482 const char *work_tree;
483 const char *template_dir = NULL;
484 unsigned int flags = 0;
485 const struct option init_db_options[] = {
486 OPT_STRING(0, "template", &template_dir, N_("template-directory"),
487 N_("directory from which templates will be used")),
488 OPT_SET_INT(0, "bare", &is_bare_repository_cfg,
489 N_("create a bare repository"), 1),
490 { OPTION_CALLBACK, 0, "shared", &init_shared_repository,
492 N_("specify that the git repository is to be shared amongst several users"),
493 PARSE_OPT_OPTARG | PARSE_OPT_NONEG, shared_callback, 0},
494 OPT_BIT('q', "quiet", &flags, N_("be quiet"), INIT_DB_QUIET),
495 OPT_STRING(0, "separate-git-dir", &real_git_dir, N_("gitdir"),
496 N_("separate git dir from working tree")),
500 argc = parse_options(argc, argv, prefix, init_db_options, init_db_usage, 0);
502 if (real_git_dir && !is_absolute_path(real_git_dir))
503 real_git_dir = real_pathdup(real_git_dir, 1);
505 if (template_dir && *template_dir && !is_absolute_path(template_dir))
506 template_dir = absolute_pathdup(template_dir);
511 if (chdir(argv[0]) < 0) {
515 * At this point we haven't read any configuration,
516 * and we know shared_repository should always be 0;
517 * but just in case we play safe.
519 saved = get_shared_repository();
520 set_shared_repository(0);
521 switch (safe_create_leading_directories_const(argv[0])) {
529 die_errno(_("cannot mkdir %s"), argv[0]);
532 set_shared_repository(saved);
533 if (mkdir(argv[0], 0777) < 0)
534 die_errno(_("cannot mkdir %s"), argv[0]);
538 die_errno(_("cannot chdir to %s"), argv[0]);
540 } else if (0 < argc) {
541 usage(init_db_usage[0]);
543 if (is_bare_repository_cfg == 1) {
544 char *cwd = xgetcwd();
545 setenv(GIT_DIR_ENVIRONMENT, cwd, argc > 0);
549 if (init_shared_repository != -1)
550 set_shared_repository(init_shared_repository);
553 * GIT_WORK_TREE makes sense only in conjunction with GIT_DIR
554 * without --bare. Catch the error early.
556 git_dir = xstrdup_or_null(getenv(GIT_DIR_ENVIRONMENT));
557 work_tree = xstrdup_or_null(getenv(GIT_WORK_TREE_ENVIRONMENT));
558 if ((!git_dir || is_bare_repository_cfg == 1) && work_tree)
559 die(_("%s (or --work-tree=<directory>) not allowed without "
560 "specifying %s (or --git-dir=<directory>)"),
561 GIT_WORK_TREE_ENVIRONMENT,
562 GIT_DIR_ENVIRONMENT);
565 * Set up the default .git directory contents
568 git_dir = DEFAULT_GIT_DIR_ENVIRONMENT;
570 if (is_bare_repository_cfg < 0)
571 is_bare_repository_cfg = guess_repository_type(git_dir);
573 if (!is_bare_repository_cfg) {
574 const char *git_dir_parent = strrchr(git_dir, '/');
575 if (git_dir_parent) {
576 char *rel = xstrndup(git_dir, git_dir_parent - git_dir);
577 git_work_tree_cfg = real_pathdup(rel, 1);
580 if (!git_work_tree_cfg)
581 git_work_tree_cfg = xgetcwd();
583 set_git_work_tree(work_tree);
585 set_git_work_tree(git_work_tree_cfg);
586 if (access(get_git_work_tree(), X_OK))
587 die_errno (_("Cannot access work tree '%s'"),
588 get_git_work_tree());
592 set_git_work_tree(work_tree);
595 UNLEAK(real_git_dir);
599 flags |= INIT_DB_EXIST_OK;
600 return init_db(git_dir, real_git_dir, template_dir, flags);