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 #define GIT_DEFAULT_HASH_ENVIRONMENT "GIT_DEFAULT_HASH"
25 static int init_is_bare_repository
= 0;
26 static int init_shared_repository
= -1;
27 static const char *init_db_template_dir
;
29 static void copy_templates_1(struct strbuf
*path
, struct strbuf
*template_path
,
32 size_t path_baselen
= path
->len
;
33 size_t template_baselen
= template_path
->len
;
36 /* Note: if ".git/hooks" file exists in the repository being
37 * re-initialized, /etc/core-git/templates/hooks/update would
38 * cause "git init" to fail here. I think this is sane but
39 * it means that the set of templates we ship by default, along
40 * with the way the namespace under .git/ is organized, should
41 * be really carefully chosen.
43 safe_create_dir(path
->buf
, 1);
44 while ((de
= readdir(dir
)) != NULL
) {
45 struct stat st_git
, st_template
;
48 strbuf_setlen(path
, path_baselen
);
49 strbuf_setlen(template_path
, template_baselen
);
51 if (de
->d_name
[0] == '.')
53 strbuf_addstr(path
, de
->d_name
);
54 strbuf_addstr(template_path
, de
->d_name
);
55 if (lstat(path
->buf
, &st_git
)) {
57 die_errno(_("cannot stat '%s'"), path
->buf
);
62 if (lstat(template_path
->buf
, &st_template
))
63 die_errno(_("cannot stat template '%s'"), template_path
->buf
);
65 if (S_ISDIR(st_template
.st_mode
)) {
66 DIR *subdir
= opendir(template_path
->buf
);
68 die_errno(_("cannot opendir '%s'"), template_path
->buf
);
69 strbuf_addch(path
, '/');
70 strbuf_addch(template_path
, '/');
71 copy_templates_1(path
, template_path
, subdir
);
76 else if (S_ISLNK(st_template
.st_mode
)) {
77 struct strbuf lnk
= STRBUF_INIT
;
78 if (strbuf_readlink(&lnk
, template_path
->buf
,
79 st_template
.st_size
) < 0)
80 die_errno(_("cannot readlink '%s'"), template_path
->buf
);
81 if (symlink(lnk
.buf
, path
->buf
))
82 die_errno(_("cannot symlink '%s' '%s'"),
86 else if (S_ISREG(st_template
.st_mode
)) {
87 if (copy_file(path
->buf
, template_path
->buf
, st_template
.st_mode
))
88 die_errno(_("cannot copy '%s' to '%s'"),
89 template_path
->buf
, path
->buf
);
92 error(_("ignoring template %s"), template_path
->buf
);
96 static void copy_templates(const char *template_dir
)
98 struct strbuf path
= STRBUF_INIT
;
99 struct strbuf template_path
= STRBUF_INIT
;
101 struct repository_format template_format
= REPOSITORY_FORMAT_INIT
;
102 struct strbuf err
= STRBUF_INIT
;
104 char *to_free
= NULL
;
107 template_dir
= getenv(TEMPLATE_DIR_ENVIRONMENT
);
109 template_dir
= init_db_template_dir
;
111 template_dir
= to_free
= system_path(DEFAULT_GIT_TEMPLATE_DIR
);
112 if (!template_dir
[0]) {
117 strbuf_addstr(&template_path
, template_dir
);
118 strbuf_complete(&template_path
, '/');
119 template_len
= template_path
.len
;
121 dir
= opendir(template_path
.buf
);
123 warning(_("templates not found in %s"), template_dir
);
127 /* Make sure that template is from the correct vintage */
128 strbuf_addstr(&template_path
, "config");
129 read_repository_format(&template_format
, template_path
.buf
);
130 strbuf_setlen(&template_path
, template_len
);
133 * No mention of version at all is OK, but anything else should be
136 if (template_format
.version
>= 0 &&
137 verify_repository_format(&template_format
, &err
) < 0) {
138 warning(_("not copying templates from '%s': %s"),
139 template_dir
, err
.buf
);
140 strbuf_release(&err
);
141 goto close_free_return
;
144 strbuf_addstr(&path
, get_git_common_dir());
145 strbuf_complete(&path
, '/');
146 copy_templates_1(&path
, &template_path
, dir
);
151 strbuf_release(&path
);
152 strbuf_release(&template_path
);
153 clear_repository_format(&template_format
);
156 static int git_init_db_config(const char *k
, const char *v
, void *cb
)
158 if (!strcmp(k
, "init.templatedir"))
159 return git_config_pathname(&init_db_template_dir
, k
, v
);
161 if (starts_with(k
, "core."))
162 return platform_core_config(k
, v
, cb
);
168 * If the git_dir is not directly inside the working tree, then git will not
169 * find it by default, and we need to set the worktree explicitly.
171 static int needs_work_tree_config(const char *git_dir
, const char *work_tree
)
173 if (!strcmp(work_tree
, "/") && !strcmp(git_dir
, "/.git"))
175 if (skip_prefix(git_dir
, work_tree
, &git_dir
) &&
176 !strcmp(git_dir
, "/.git"))
181 void initialize_repository_version(int hash_algo
)
183 char repo_version_string
[10];
184 int repo_version
= GIT_REPO_VERSION
;
186 if (hash_algo
!= GIT_HASH_SHA1
)
187 repo_version
= GIT_REPO_VERSION_READ
;
189 /* This forces creation of new config file */
190 xsnprintf(repo_version_string
, sizeof(repo_version_string
),
192 git_config_set("core.repositoryformatversion", repo_version_string
);
194 if (hash_algo
!= GIT_HASH_SHA1
)
195 git_config_set("extensions.objectformat",
196 hash_algos
[hash_algo
].name
);
199 static int create_default_files(const char *template_path
,
200 const char *original_git_dir
,
201 const char *initial_branch
,
202 const struct repository_format
*fmt
)
205 struct strbuf buf
= STRBUF_INIT
;
210 struct strbuf err
= STRBUF_INIT
;
212 /* Just look for `init.templatedir` */
213 init_db_template_dir
= NULL
; /* re-set in case it was set before */
214 git_config(git_init_db_config
, NULL
);
217 * First copy the templates -- we might have the default
218 * config file there, in which case we would want to read
219 * from it after installing.
221 * Before reading that config, we also need to clear out any cached
222 * values (since we've just potentially changed what's available on
225 copy_templates(template_path
);
227 reset_shared_repository();
228 git_config(git_default_config
, NULL
);
231 * We must make sure command-line options continue to override any
232 * values we might have just re-read from the config.
234 is_bare_repository_cfg
= init_is_bare_repository
;
235 if (init_shared_repository
!= -1)
236 set_shared_repository(init_shared_repository
);
239 * We would have created the above under user's umask -- under
240 * shared-repository settings, we would need to fix them up.
242 if (get_shared_repository()) {
243 adjust_shared_perm(get_git_dir());
247 * We need to create a "refs" dir in any case so that older
248 * versions of git can tell that this is a repository.
250 safe_create_dir(git_path("refs"), 1);
251 adjust_shared_perm(git_path("refs"));
253 if (refs_init_db(&err
))
254 die("failed to set up refs db: %s", err
.buf
);
257 * Point the HEAD symref to the initial branch with if HEAD does
260 path
= git_path_buf(&buf
, "HEAD");
261 reinit
= (!access(path
, R_OK
)
262 || readlink(path
, junk
, sizeof(junk
)-1) != -1);
267 initial_branch
= git_default_branch_name();
269 ref
= xstrfmt("refs/heads/%s", initial_branch
);
270 if (check_refname_format(ref
, 0) < 0)
271 die(_("invalid initial branch name: '%s'"),
274 if (create_symref("HEAD", ref
, NULL
) < 0)
279 initialize_repository_version(fmt
->hash_algo
);
281 /* Check filemode trustability */
282 path
= git_path_buf(&buf
, "config");
283 filemode
= TEST_FILEMODE
;
284 if (TEST_FILEMODE
&& !lstat(path
, &st1
)) {
286 filemode
= (!chmod(path
, st1
.st_mode
^ S_IXUSR
) &&
287 !lstat(path
, &st2
) &&
288 st1
.st_mode
!= st2
.st_mode
&&
289 !chmod(path
, st1
.st_mode
));
290 if (filemode
&& !reinit
&& (st1
.st_mode
& S_IXUSR
))
293 git_config_set("core.filemode", filemode
? "true" : "false");
295 if (is_bare_repository())
296 git_config_set("core.bare", "true");
298 const char *work_tree
= get_git_work_tree();
299 git_config_set("core.bare", "false");
300 /* allow template config file to override the default */
301 if (log_all_ref_updates
== LOG_REFS_UNSET
)
302 git_config_set("core.logallrefupdates", "true");
303 if (needs_work_tree_config(original_git_dir
, work_tree
))
304 git_config_set("core.worktree", work_tree
);
308 /* Check if symlink is supported in the work tree */
309 path
= git_path_buf(&buf
, "tXXXXXX");
310 if (!close(xmkstemp(path
)) &&
312 !symlink("testing", path
) &&
313 !lstat(path
, &st1
) &&
314 S_ISLNK(st1
.st_mode
))
315 unlink(path
); /* good */
317 git_config_set("core.symlinks", "false");
319 /* Check if the filesystem is case-insensitive */
320 path
= git_path_buf(&buf
, "CoNfIg");
321 if (!access(path
, F_OK
))
322 git_config_set("core.ignorecase", "true");
323 probe_utf8_pathname_composition();
326 strbuf_release(&buf
);
330 static void create_object_directory(void)
332 struct strbuf path
= STRBUF_INIT
;
335 strbuf_addstr(&path
, get_object_directory());
338 safe_create_dir(path
.buf
, 1);
340 strbuf_setlen(&path
, baselen
);
341 strbuf_addstr(&path
, "/pack");
342 safe_create_dir(path
.buf
, 1);
344 strbuf_setlen(&path
, baselen
);
345 strbuf_addstr(&path
, "/info");
346 safe_create_dir(path
.buf
, 1);
348 strbuf_release(&path
);
351 static void separate_git_dir(const char *git_dir
, const char *git_link
)
355 if (!stat(git_link
, &st
)) {
358 if (S_ISREG(st
.st_mode
))
359 src
= read_gitfile(git_link
);
360 else if (S_ISDIR(st
.st_mode
))
363 die(_("unable to handle file type %d"), (int)st
.st_mode
);
365 if (rename(src
, git_dir
))
366 die_errno(_("unable to move %s to %s"), src
, git_dir
);
369 write_file(git_link
, "gitdir: %s", git_dir
);
372 static void validate_hash_algorithm(struct repository_format
*repo_fmt
, int hash
)
374 const char *env
= getenv(GIT_DEFAULT_HASH_ENVIRONMENT
);
376 * If we already have an initialized repo, don't allow the user to
377 * specify a different algorithm, as that could cause corruption.
378 * Otherwise, if the user has specified one on the command line, use it.
380 if (repo_fmt
->version
>= 0 && hash
!= GIT_HASH_UNKNOWN
&& hash
!= repo_fmt
->hash_algo
)
381 die(_("attempt to reinitialize repository with different hash"));
382 else if (hash
!= GIT_HASH_UNKNOWN
)
383 repo_fmt
->hash_algo
= hash
;
385 int env_algo
= hash_algo_by_name(env
);
386 if (env_algo
== GIT_HASH_UNKNOWN
)
387 die(_("unknown hash algorithm '%s'"), env
);
388 repo_fmt
->hash_algo
= env_algo
;
392 int init_db(const char *git_dir
, const char *real_git_dir
,
393 const char *template_dir
, int hash
, const char *initial_branch
,
397 int exist_ok
= flags
& INIT_DB_EXIST_OK
;
398 char *original_git_dir
= real_pathdup(git_dir
, 1);
399 struct repository_format repo_fmt
= REPOSITORY_FORMAT_INIT
;
404 if (!exist_ok
&& !stat(git_dir
, &st
))
405 die(_("%s already exists"), git_dir
);
407 if (!exist_ok
&& !stat(real_git_dir
, &st
))
408 die(_("%s already exists"), real_git_dir
);
410 set_git_dir(real_git_dir
, 1);
411 git_dir
= get_git_dir();
412 separate_git_dir(git_dir
, original_git_dir
);
415 set_git_dir(git_dir
, 1);
416 git_dir
= get_git_dir();
418 startup_info
->have_repository
= 1;
420 /* Just look for `core.hidedotfiles` */
421 git_config(git_init_db_config
, NULL
);
423 safe_create_dir(git_dir
, 0);
425 init_is_bare_repository
= is_bare_repository();
427 /* Check to see if the repository version is right.
428 * Note that a newly created repository does not have
429 * config file, so this will not fail. What we are catching
430 * is an attempt to reinitialize new repository with an old tool.
432 check_repository_format(&repo_fmt
);
434 validate_hash_algorithm(&repo_fmt
, hash
);
436 reinit
= create_default_files(template_dir
, original_git_dir
,
437 initial_branch
, &repo_fmt
);
438 if (reinit
&& initial_branch
)
439 warning(_("re-init: ignored --initial-branch=%s"),
442 create_object_directory();
444 if (get_shared_repository()) {
446 /* We do not spell "group" and such, so that
447 * the configuration can be read by older version
448 * of git. Note, we use octal numbers for new share modes,
449 * and compatibility values for PERM_GROUP and
452 if (get_shared_repository() < 0)
453 /* force to the mode value */
454 xsnprintf(buf
, sizeof(buf
), "0%o", -get_shared_repository());
455 else if (get_shared_repository() == PERM_GROUP
)
456 xsnprintf(buf
, sizeof(buf
), "%d", OLD_PERM_GROUP
);
457 else if (get_shared_repository() == PERM_EVERYBODY
)
458 xsnprintf(buf
, sizeof(buf
), "%d", OLD_PERM_EVERYBODY
);
460 BUG("invalid value for shared_repository");
461 git_config_set("core.sharedrepository", buf
);
462 git_config_set("receive.denyNonFastforwards", "true");
465 if (!(flags
& INIT_DB_QUIET
)) {
466 int len
= strlen(git_dir
);
469 printf(get_shared_repository()
470 ? _("Reinitialized existing shared Git repository in %s%s\n")
471 : _("Reinitialized existing Git repository in %s%s\n"),
472 git_dir
, len
&& git_dir
[len
-1] != '/' ? "/" : "");
474 printf(get_shared_repository()
475 ? _("Initialized empty shared Git repository in %s%s\n")
476 : _("Initialized empty Git repository in %s%s\n"),
477 git_dir
, len
&& git_dir
[len
-1] != '/' ? "/" : "");
480 free(original_git_dir
);
484 static int guess_repository_type(const char *git_dir
)
491 * "GIT_DIR=. git init" is always bare.
492 * "GIT_DIR=`pwd` git init" too.
494 if (!strcmp(".", git_dir
))
497 cwd_is_git_dir
= !strcmp(git_dir
, cwd
);
502 * "GIT_DIR=.git or GIT_DIR=something/.git is usually not.
504 if (!strcmp(git_dir
, ".git"))
506 slash
= strrchr(git_dir
, '/');
507 if (slash
&& !strcmp(slash
, "/.git"))
511 * Otherwise it is often bare. At this point
512 * we are just guessing.
517 static int shared_callback(const struct option
*opt
, const char *arg
, int unset
)
519 BUG_ON_OPT_NEG(unset
);
520 *((int *) opt
->value
) = (arg
) ? git_config_perm("arg", arg
) : PERM_GROUP
;
524 static const char *const init_db_usage
[] = {
525 N_("git init [-q | --quiet] [--bare] [--template=<template-directory>] [--shared[=<permissions>]] [<directory>]"),
530 * If you want to, you can share the DB area with any number of branches.
531 * That has advantages: you can save space by sharing all the SHA1 objects.
532 * On the other hand, it might just make lookup slower and messier. You
533 * be the judge. The default case is to have one DB per managed directory.
535 int cmd_init_db(int argc
, const char **argv
, const char *prefix
)
538 const char *real_git_dir
= NULL
;
539 const char *work_tree
;
540 const char *template_dir
= NULL
;
541 unsigned int flags
= 0;
542 const char *object_format
= NULL
;
543 const char *initial_branch
= NULL
;
544 int hash_algo
= GIT_HASH_UNKNOWN
;
545 const struct option init_db_options
[] = {
546 OPT_STRING(0, "template", &template_dir
, N_("template-directory"),
547 N_("directory from which templates will be used")),
548 OPT_SET_INT(0, "bare", &is_bare_repository_cfg
,
549 N_("create a bare repository"), 1),
550 { OPTION_CALLBACK
, 0, "shared", &init_shared_repository
,
552 N_("specify that the git repository is to be shared amongst several users"),
553 PARSE_OPT_OPTARG
| PARSE_OPT_NONEG
, shared_callback
, 0},
554 OPT_BIT('q', "quiet", &flags
, N_("be quiet"), INIT_DB_QUIET
),
555 OPT_STRING(0, "separate-git-dir", &real_git_dir
, N_("gitdir"),
556 N_("separate git dir from working tree")),
557 OPT_STRING('b', "initial-branch", &initial_branch
, N_("name"),
558 N_("override the name of the initial branch")),
559 OPT_STRING(0, "object-format", &object_format
, N_("hash"),
560 N_("specify the hash algorithm to use")),
564 argc
= parse_options(argc
, argv
, prefix
, init_db_options
, init_db_usage
, 0);
566 if (real_git_dir
&& !is_absolute_path(real_git_dir
))
567 real_git_dir
= real_pathdup(real_git_dir
, 1);
569 if (template_dir
&& *template_dir
&& !is_absolute_path(template_dir
))
570 template_dir
= absolute_pathdup(template_dir
);
575 if (chdir(argv
[0]) < 0) {
579 * At this point we haven't read any configuration,
580 * and we know shared_repository should always be 0;
581 * but just in case we play safe.
583 saved
= get_shared_repository();
584 set_shared_repository(0);
585 switch (safe_create_leading_directories_const(argv
[0])) {
593 die_errno(_("cannot mkdir %s"), argv
[0]);
596 set_shared_repository(saved
);
597 if (mkdir(argv
[0], 0777) < 0)
598 die_errno(_("cannot mkdir %s"), argv
[0]);
602 die_errno(_("cannot chdir to %s"), argv
[0]);
604 } else if (0 < argc
) {
605 usage(init_db_usage
[0]);
607 if (is_bare_repository_cfg
== 1) {
608 char *cwd
= xgetcwd();
609 setenv(GIT_DIR_ENVIRONMENT
, cwd
, argc
> 0);
614 hash_algo
= hash_algo_by_name(object_format
);
615 if (hash_algo
== GIT_HASH_UNKNOWN
)
616 die(_("unknown hash algorithm '%s'"), object_format
);
619 if (init_shared_repository
!= -1)
620 set_shared_repository(init_shared_repository
);
623 * GIT_WORK_TREE makes sense only in conjunction with GIT_DIR
624 * without --bare. Catch the error early.
626 git_dir
= xstrdup_or_null(getenv(GIT_DIR_ENVIRONMENT
));
627 work_tree
= xstrdup_or_null(getenv(GIT_WORK_TREE_ENVIRONMENT
));
628 if ((!git_dir
|| is_bare_repository_cfg
== 1) && work_tree
)
629 die(_("%s (or --work-tree=<directory>) not allowed without "
630 "specifying %s (or --git-dir=<directory>)"),
631 GIT_WORK_TREE_ENVIRONMENT
,
632 GIT_DIR_ENVIRONMENT
);
635 * Set up the default .git directory contents
638 git_dir
= DEFAULT_GIT_DIR_ENVIRONMENT
;
640 if (is_bare_repository_cfg
< 0)
641 is_bare_repository_cfg
= guess_repository_type(git_dir
);
643 if (!is_bare_repository_cfg
) {
644 const char *git_dir_parent
= strrchr(git_dir
, '/');
645 if (git_dir_parent
) {
646 char *rel
= xstrndup(git_dir
, git_dir_parent
- git_dir
);
647 git_work_tree_cfg
= real_pathdup(rel
, 1);
650 if (!git_work_tree_cfg
)
651 git_work_tree_cfg
= xgetcwd();
653 set_git_work_tree(work_tree
);
655 set_git_work_tree(git_work_tree_cfg
);
656 if (access(get_git_work_tree(), X_OK
))
657 die_errno (_("Cannot access work tree '%s'"),
658 get_git_work_tree());
662 set_git_work_tree(work_tree
);
665 UNLEAK(real_git_dir
);
669 flags
|= INIT_DB_EXIST_OK
;
670 return init_db(git_dir
, real_git_dir
, template_dir
, hash_algo
,
671 initial_branch
, flags
);