2 * GIT - The information manager from hell
4 * Copyright (C) Linus Torvalds, 2005
10 #include "parse-options.h"
12 #ifndef DEFAULT_GIT_TEMPLATE_DIR
13 #define DEFAULT_GIT_TEMPLATE_DIR "/usr/share/git-core/templates"
16 #ifdef NO_TRUSTABLE_FILEMODE
17 #define TEST_FILEMODE 0
19 #define TEST_FILEMODE 1
22 static int init_is_bare_repository
= 0;
23 static int init_shared_repository
= -1;
24 static const char *init_db_template_dir
;
25 static const char *git_link
;
27 static void copy_templates_1(struct strbuf
*path
, struct strbuf
*template,
30 size_t path_baselen
= path
->len
;
31 size_t template_baselen
= template->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, template_baselen
);
49 if (de
->d_name
[0] == '.')
51 strbuf_addstr(path
, de
->d_name
);
52 strbuf_addstr(template, de
->d_name
);
53 if (lstat(path
->buf
, &st_git
)) {
55 die_errno(_("cannot stat '%s'"), path
->buf
);
60 if (lstat(template->buf
, &st_template
))
61 die_errno(_("cannot stat template '%s'"), template->buf
);
63 if (S_ISDIR(st_template
.st_mode
)) {
64 DIR *subdir
= opendir(template->buf
);
66 die_errno(_("cannot opendir '%s'"), template->buf
);
67 strbuf_addch(path
, '/');
68 strbuf_addch(template, '/');
69 copy_templates_1(path
, template, subdir
);
74 else if (S_ISLNK(st_template
.st_mode
)) {
75 struct strbuf lnk
= STRBUF_INIT
;
76 if (strbuf_readlink(&lnk
, template->buf
, 0) < 0)
77 die_errno(_("cannot readlink '%s'"), template->buf
);
78 if (symlink(lnk
.buf
, path
->buf
))
79 die_errno(_("cannot symlink '%s' '%s'"),
83 else if (S_ISREG(st_template
.st_mode
)) {
84 if (copy_file(path
->buf
, template->buf
, st_template
.st_mode
))
85 die_errno(_("cannot copy '%s' to '%s'"),
86 template->buf
, path
->buf
);
89 error(_("ignoring template %s"), template->buf
);
93 static void copy_templates(const char *template_dir
)
95 struct strbuf path
= STRBUF_INIT
;
96 struct strbuf template_path
= STRBUF_INIT
;
98 struct repository_format template_format
;
99 struct strbuf err
= STRBUF_INIT
;
101 char *to_free
= NULL
;
104 template_dir
= getenv(TEMPLATE_DIR_ENVIRONMENT
);
106 template_dir
= init_db_template_dir
;
108 template_dir
= to_free
= system_path(DEFAULT_GIT_TEMPLATE_DIR
);
109 if (!template_dir
[0]) {
114 strbuf_addstr(&template_path
, template_dir
);
115 strbuf_complete(&template_path
, '/');
116 template_len
= template_path
.len
;
118 dir
= opendir(template_path
.buf
);
120 warning(_("templates not found %s"), template_dir
);
124 /* Make sure that template is from the correct vintage */
125 strbuf_addstr(&template_path
, "config");
126 read_repository_format(&template_format
, template_path
.buf
);
127 strbuf_setlen(&template_path
, template_len
);
130 * No mention of version at all is OK, but anything else should be
133 if (template_format
.version
>= 0 &&
134 verify_repository_format(&template_format
, &err
) < 0) {
135 warning(_("not copying templates from '%s': %s"),
136 template_dir
, err
.buf
);
137 strbuf_release(&err
);
138 goto close_free_return
;
141 strbuf_addstr(&path
, get_git_dir());
142 strbuf_complete(&path
, '/');
143 copy_templates_1(&path
, &template_path
, dir
);
148 strbuf_release(&path
);
149 strbuf_release(&template_path
);
152 static int git_init_db_config(const char *k
, const char *v
, void *cb
)
154 if (!strcmp(k
, "init.templatedir"))
155 return git_config_pathname(&init_db_template_dir
, k
, v
);
161 * If the git_dir is not directly inside the working tree, then git will not
162 * find it by default, and we need to set the worktree explicitly.
164 static int needs_work_tree_config(const char *git_dir
, const char *work_tree
)
166 if (!strcmp(work_tree
, "/") && !strcmp(git_dir
, "/.git"))
168 if (skip_prefix(git_dir
, work_tree
, &git_dir
) &&
169 !strcmp(git_dir
, "/.git"))
174 static int create_default_files(const char *template_path
)
177 struct strbuf buf
= STRBUF_INIT
;
179 char repo_version_string
[10];
183 struct strbuf err
= STRBUF_INIT
;
185 /* Just look for `init.templatedir` */
186 git_config(git_init_db_config
, NULL
);
188 /* First copy the templates -- we might have the default
189 * config file there, in which case we would want to read
190 * from it after installing.
192 copy_templates(template_path
);
194 git_config(git_default_config
, NULL
);
195 is_bare_repository_cfg
= init_is_bare_repository
;
197 /* reading existing config may have overwrote it */
198 if (init_shared_repository
!= -1)
199 set_shared_repository(init_shared_repository
);
202 * We would have created the above under user's umask -- under
203 * shared-repository settings, we would need to fix them up.
205 if (get_shared_repository()) {
206 adjust_shared_perm(get_git_dir());
210 * We need to create a "refs" dir in any case so that older
211 * versions of git can tell that this is a repository.
213 safe_create_dir(git_path("refs"), 1);
214 adjust_shared_perm(git_path("refs"));
216 if (refs_init_db(&err
))
217 die("failed to set up refs db: %s", err
.buf
);
220 * Create the default symlink from ".git/HEAD" to the "master"
221 * branch, if it does not exist yet.
223 path
= git_path_buf(&buf
, "HEAD");
224 reinit
= (!access(path
, R_OK
)
225 || readlink(path
, junk
, sizeof(junk
)-1) != -1);
227 if (create_symref("HEAD", "refs/heads/master", NULL
) < 0)
231 /* This forces creation of new config file */
232 xsnprintf(repo_version_string
, sizeof(repo_version_string
),
233 "%d", GIT_REPO_VERSION
);
234 git_config_set("core.repositoryformatversion", repo_version_string
);
236 /* Check filemode trustability */
237 path
= git_path_buf(&buf
, "config");
238 filemode
= TEST_FILEMODE
;
239 if (TEST_FILEMODE
&& !lstat(path
, &st1
)) {
241 filemode
= (!chmod(path
, st1
.st_mode
^ S_IXUSR
) &&
242 !lstat(path
, &st2
) &&
243 st1
.st_mode
!= st2
.st_mode
&&
244 !chmod(path
, st1
.st_mode
));
245 if (filemode
&& !reinit
&& (st1
.st_mode
& S_IXUSR
))
248 git_config_set("core.filemode", filemode
? "true" : "false");
250 if (is_bare_repository())
251 git_config_set("core.bare", "true");
253 const char *work_tree
= get_git_work_tree();
254 git_config_set("core.bare", "false");
255 /* allow template config file to override the default */
256 if (log_all_ref_updates
== -1)
257 git_config_set("core.logallrefupdates", "true");
258 if (needs_work_tree_config(get_git_dir(), work_tree
))
259 git_config_set("core.worktree", work_tree
);
263 /* Check if symlink is supported in the work tree */
264 path
= git_path_buf(&buf
, "tXXXXXX");
265 if (!close(xmkstemp(path
)) &&
267 !symlink("testing", path
) &&
268 !lstat(path
, &st1
) &&
269 S_ISLNK(st1
.st_mode
))
270 unlink(path
); /* good */
272 git_config_set("core.symlinks", "false");
274 /* Check if the filesystem is case-insensitive */
275 path
= git_path_buf(&buf
, "CoNfIg");
276 if (!access(path
, F_OK
))
277 git_config_set("core.ignorecase", "true");
278 probe_utf8_pathname_composition();
281 strbuf_release(&buf
);
285 static void create_object_directory(void)
287 struct strbuf path
= STRBUF_INIT
;
290 strbuf_addstr(&path
, get_object_directory());
293 safe_create_dir(path
.buf
, 1);
295 strbuf_setlen(&path
, baselen
);
296 strbuf_addstr(&path
, "/pack");
297 safe_create_dir(path
.buf
, 1);
299 strbuf_setlen(&path
, baselen
);
300 strbuf_addstr(&path
, "/info");
301 safe_create_dir(path
.buf
, 1);
303 strbuf_release(&path
);
306 int set_git_dir_init(const char *git_dir
, const char *real_git_dir
,
312 if (!exist_ok
&& !stat(git_dir
, &st
))
313 die(_("%s already exists"), git_dir
);
315 if (!exist_ok
&& !stat(real_git_dir
, &st
))
316 die(_("%s already exists"), real_git_dir
);
319 * make sure symlinks are resolved because we'll be
320 * moving the target repo later on in separate_git_dir()
322 git_link
= xstrdup(real_path(git_dir
));
323 set_git_dir(real_path(real_git_dir
));
326 set_git_dir(real_path(git_dir
));
329 startup_info
->have_repository
= 1;
333 static void separate_git_dir(const char *git_dir
)
337 if (!stat(git_link
, &st
)) {
340 if (S_ISREG(st
.st_mode
))
341 src
= read_gitfile(git_link
);
342 else if (S_ISDIR(st
.st_mode
))
345 die(_("unable to handle file type %d"), (int)st
.st_mode
);
347 if (rename(src
, git_dir
))
348 die_errno(_("unable to move %s to %s"), src
, git_dir
);
351 write_file(git_link
, "gitdir: %s", git_dir
);
354 int init_db(const char *template_dir
, unsigned int flags
)
357 const char *git_dir
= get_git_dir();
360 separate_git_dir(git_dir
);
362 safe_create_dir(git_dir
, 0);
364 init_is_bare_repository
= is_bare_repository();
366 /* Check to see if the repository version is right.
367 * Note that a newly created repository does not have
368 * config file, so this will not fail. What we are catching
369 * is an attempt to reinitialize new repository with an old tool.
371 check_repository_format();
373 reinit
= create_default_files(template_dir
);
375 create_object_directory();
377 if (get_shared_repository()) {
379 /* We do not spell "group" and such, so that
380 * the configuration can be read by older version
381 * of git. Note, we use octal numbers for new share modes,
382 * and compatibility values for PERM_GROUP and
385 if (get_shared_repository() < 0)
386 /* force to the mode value */
387 xsnprintf(buf
, sizeof(buf
), "0%o", -get_shared_repository());
388 else if (get_shared_repository() == PERM_GROUP
)
389 xsnprintf(buf
, sizeof(buf
), "%d", OLD_PERM_GROUP
);
390 else if (get_shared_repository() == PERM_EVERYBODY
)
391 xsnprintf(buf
, sizeof(buf
), "%d", OLD_PERM_EVERYBODY
);
393 die("BUG: invalid value for shared_repository");
394 git_config_set("core.sharedrepository", buf
);
395 git_config_set("receive.denyNonFastforwards", "true");
398 if (!(flags
& INIT_DB_QUIET
)) {
399 int len
= strlen(git_dir
);
402 printf(get_shared_repository()
403 ? _("Reinitialized existing shared Git repository in %s%s\n")
404 : _("Reinitialized existing Git repository in %s%s\n"),
405 git_dir
, len
&& git_dir
[len
-1] != '/' ? "/" : "");
407 printf(get_shared_repository()
408 ? _("Initialized empty shared Git repository in %s%s\n")
409 : _("Initialized empty Git repository in %s%s\n"),
410 git_dir
, len
&& git_dir
[len
-1] != '/' ? "/" : "");
416 static int guess_repository_type(const char *git_dir
)
423 * "GIT_DIR=. git init" is always bare.
424 * "GIT_DIR=`pwd` git init" too.
426 if (!strcmp(".", git_dir
))
429 cwd_is_git_dir
= !strcmp(git_dir
, cwd
);
434 * "GIT_DIR=.git or GIT_DIR=something/.git is usually not.
436 if (!strcmp(git_dir
, ".git"))
438 slash
= strrchr(git_dir
, '/');
439 if (slash
&& !strcmp(slash
, "/.git"))
443 * Otherwise it is often bare. At this point
444 * we are just guessing.
449 static int shared_callback(const struct option
*opt
, const char *arg
, int unset
)
451 *((int *) opt
->value
) = (arg
) ? git_config_perm("arg", arg
) : PERM_GROUP
;
455 static const char *const init_db_usage
[] = {
456 N_("git init [-q | --quiet] [--bare] [--template=<template-directory>] [--shared[=<permissions>]] [<directory>]"),
461 * If you want to, you can share the DB area with any number of branches.
462 * That has advantages: you can save space by sharing all the SHA1 objects.
463 * On the other hand, it might just make lookup slower and messier. You
464 * be the judge. The default case is to have one DB per managed directory.
466 int cmd_init_db(int argc
, const char **argv
, const char *prefix
)
469 const char *real_git_dir
= NULL
;
470 const char *work_tree
;
471 const char *template_dir
= NULL
;
472 unsigned int flags
= 0;
473 const struct option init_db_options
[] = {
474 OPT_STRING(0, "template", &template_dir
, N_("template-directory"),
475 N_("directory from which templates will be used")),
476 OPT_SET_INT(0, "bare", &is_bare_repository_cfg
,
477 N_("create a bare repository"), 1),
478 { OPTION_CALLBACK
, 0, "shared", &init_shared_repository
,
480 N_("specify that the git repository is to be shared amongst several users"),
481 PARSE_OPT_OPTARG
| PARSE_OPT_NONEG
, shared_callback
, 0},
482 OPT_BIT('q', "quiet", &flags
, N_("be quiet"), INIT_DB_QUIET
),
483 OPT_STRING(0, "separate-git-dir", &real_git_dir
, N_("gitdir"),
484 N_("separate git dir from working tree")),
488 argc
= parse_options(argc
, argv
, prefix
, init_db_options
, init_db_usage
, 0);
490 if (real_git_dir
&& !is_absolute_path(real_git_dir
))
491 real_git_dir
= xstrdup(real_path(real_git_dir
));
496 if (chdir(argv
[0]) < 0) {
500 * At this point we haven't read any configuration,
501 * and we know shared_repository should always be 0;
502 * but just in case we play safe.
504 saved
= get_shared_repository();
505 set_shared_repository(0);
506 switch (safe_create_leading_directories_const(argv
[0])) {
514 die_errno(_("cannot mkdir %s"), argv
[0]);
517 set_shared_repository(saved
);
518 if (mkdir(argv
[0], 0777) < 0)
519 die_errno(_("cannot mkdir %s"), argv
[0]);
523 die_errno(_("cannot chdir to %s"), argv
[0]);
525 } else if (0 < argc
) {
526 usage(init_db_usage
[0]);
528 if (is_bare_repository_cfg
== 1) {
529 char *cwd
= xgetcwd();
530 setenv(GIT_DIR_ENVIRONMENT
, cwd
, argc
> 0);
534 if (init_shared_repository
!= -1)
535 set_shared_repository(init_shared_repository
);
538 * GIT_WORK_TREE makes sense only in conjunction with GIT_DIR
539 * without --bare. Catch the error early.
541 git_dir
= getenv(GIT_DIR_ENVIRONMENT
);
542 work_tree
= getenv(GIT_WORK_TREE_ENVIRONMENT
);
543 if ((!git_dir
|| is_bare_repository_cfg
== 1) && work_tree
)
544 die(_("%s (or --work-tree=<directory>) not allowed without "
545 "specifying %s (or --git-dir=<directory>)"),
546 GIT_WORK_TREE_ENVIRONMENT
,
547 GIT_DIR_ENVIRONMENT
);
550 * Set up the default .git directory contents
553 git_dir
= DEFAULT_GIT_DIR_ENVIRONMENT
;
555 if (is_bare_repository_cfg
< 0)
556 is_bare_repository_cfg
= guess_repository_type(git_dir
);
558 if (!is_bare_repository_cfg
) {
559 const char *git_dir_parent
= strrchr(git_dir
, '/');
560 if (git_dir_parent
) {
561 char *rel
= xstrndup(git_dir
, git_dir_parent
- git_dir
);
562 git_work_tree_cfg
= xstrdup(real_path(rel
));
565 if (!git_work_tree_cfg
)
566 git_work_tree_cfg
= xgetcwd();
568 set_git_work_tree(work_tree
);
570 set_git_work_tree(git_work_tree_cfg
);
571 if (access(get_git_work_tree(), X_OK
))
572 die_errno (_("Cannot access work tree '%s'"),
573 get_git_work_tree());
577 set_git_work_tree(work_tree
);
580 set_git_dir_init(git_dir
, real_git_dir
, 1);
582 return init_db(template_dir
, flags
);