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(NULL
);
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
);