2 * GIT - The information manager from hell
4 * Copyright (C) Linus Torvalds, 2005
9 #include "parse-options.h"
11 #ifndef DEFAULT_GIT_TEMPLATE_DIR
12 #define DEFAULT_GIT_TEMPLATE_DIR "/usr/share/git-core/templates"
15 #ifdef NO_TRUSTABLE_FILEMODE
16 #define TEST_FILEMODE 0
18 #define TEST_FILEMODE 1
21 static int init_is_bare_repository
= 0;
22 static int init_shared_repository
= -1;
23 static const char *init_db_template_dir
;
24 static const char *git_link
;
26 static void safe_create_dir(const char *dir
, int share
)
28 if (mkdir(dir
, 0777) < 0) {
29 if (errno
!= EEXIST
) {
34 else if (share
&& adjust_shared_perm(dir
))
35 die(_("Could not make %s writable by group"), dir
);
38 static void copy_templates_1(char *path
, int baselen
,
39 char *template, int template_baselen
,
44 /* Note: if ".git/hooks" file exists in the repository being
45 * re-initialized, /etc/core-git/templates/hooks/update would
46 * cause "git init" to fail here. I think this is sane but
47 * it means that the set of templates we ship by default, along
48 * with the way the namespace under .git/ is organized, should
49 * be really carefully chosen.
51 safe_create_dir(path
, 1);
52 while ((de
= readdir(dir
)) != NULL
) {
53 struct stat st_git
, st_template
;
57 if (de
->d_name
[0] == '.')
59 namelen
= strlen(de
->d_name
);
60 if ((PATH_MAX
<= baselen
+ namelen
) ||
61 (PATH_MAX
<= template_baselen
+ namelen
))
62 die(_("insanely long template name %s"), de
->d_name
);
63 memcpy(path
+ baselen
, de
->d_name
, namelen
+1);
64 memcpy(template + template_baselen
, de
->d_name
, namelen
+1);
65 if (lstat(path
, &st_git
)) {
67 die_errno(_("cannot stat '%s'"), path
);
72 if (lstat(template, &st_template
))
73 die_errno(_("cannot stat template '%s'"), template);
75 if (S_ISDIR(st_template
.st_mode
)) {
76 DIR *subdir
= opendir(template);
77 int baselen_sub
= baselen
+ namelen
;
78 int template_baselen_sub
= template_baselen
+ namelen
;
80 die_errno(_("cannot opendir '%s'"), template);
82 template[template_baselen_sub
++] = '/';
84 template[template_baselen_sub
] = 0;
85 copy_templates_1(path
, baselen_sub
,
86 template, template_baselen_sub
,
92 else if (S_ISLNK(st_template
.st_mode
)) {
95 len
= readlink(template, lnk
, sizeof(lnk
));
97 die_errno(_("cannot readlink '%s'"), template);
98 if (sizeof(lnk
) <= len
)
99 die(_("insanely long symlink %s"), template);
101 if (symlink(lnk
, path
))
102 die_errno(_("cannot symlink '%s' '%s'"), lnk
, path
);
104 else if (S_ISREG(st_template
.st_mode
)) {
105 if (copy_file(path
, template, st_template
.st_mode
))
106 die_errno(_("cannot copy '%s' to '%s'"), template,
110 error(_("ignoring template %s"), template);
114 static void copy_templates(const char *template_dir
)
117 char template_path
[PATH_MAX
];
120 const char *git_dir
= get_git_dir();
121 int len
= strlen(git_dir
);
124 template_dir
= getenv(TEMPLATE_DIR_ENVIRONMENT
);
126 template_dir
= init_db_template_dir
;
128 template_dir
= system_path(DEFAULT_GIT_TEMPLATE_DIR
);
129 if (!template_dir
[0])
131 template_len
= strlen(template_dir
);
132 if (PATH_MAX
<= (template_len
+strlen("/config")))
133 die(_("insanely long template path %s"), template_dir
);
134 strcpy(template_path
, template_dir
);
135 if (template_path
[template_len
-1] != '/') {
136 template_path
[template_len
++] = '/';
137 template_path
[template_len
] = 0;
139 dir
= opendir(template_path
);
141 warning(_("templates not found %s"), template_dir
);
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
, NULL
);
150 template_path
[template_len
] = 0;
152 if (repository_format_version
&&
153 repository_format_version
!= GIT_REPO_VERSION
) {
154 warning(_("not copying templates of "
155 "a wrong format version %d from '%s'"),
156 repository_format_version
,
162 memcpy(path
, git_dir
, len
);
163 if (len
&& path
[len
- 1] != '/')
166 copy_templates_1(path
, len
,
167 template_path
, template_len
,
172 static int git_init_db_config(const char *k
, const char *v
, void *cb
)
174 if (!strcmp(k
, "init.templatedir"))
175 return git_config_pathname(&init_db_template_dir
, k
, v
);
181 * If the git_dir is not directly inside the working tree, then git will not
182 * find it by default, and we need to set the worktree explicitly.
184 static int needs_work_tree_config(const char *git_dir
, const char *work_tree
)
186 if (!strcmp(work_tree
, "/") && !strcmp(git_dir
, "/.git"))
188 if (skip_prefix(git_dir
, work_tree
, &git_dir
) &&
189 !strcmp(git_dir
, "/.git"))
194 static int create_default_files(const char *template_path
)
196 const char *git_dir
= get_git_dir();
197 unsigned len
= strlen(git_dir
);
198 static char path
[PATH_MAX
];
200 char repo_version_string
[10];
205 if (len
> sizeof(path
)-50)
206 die(_("insane git directory %s"), git_dir
);
207 memcpy(path
, git_dir
, len
);
209 if (len
&& path
[len
-1] != '/')
213 * Create .git/refs/{heads,tags}
215 safe_create_dir(git_path("refs"), 1);
216 safe_create_dir(git_path("refs/heads"), 1);
217 safe_create_dir(git_path("refs/tags"), 1);
219 /* Just look for `init.templatedir` */
220 git_config(git_init_db_config
, NULL
);
222 /* First copy the templates -- we might have the default
223 * config file there, in which case we would want to read
224 * from it after installing.
226 copy_templates(template_path
);
228 git_config(git_default_config
, NULL
);
229 is_bare_repository_cfg
= init_is_bare_repository
;
231 /* reading existing config may have overwrote it */
232 if (init_shared_repository
!= -1)
233 shared_repository
= init_shared_repository
;
236 * We would have created the above under user's umask -- under
237 * shared-repository settings, we would need to fix them up.
239 if (shared_repository
) {
240 adjust_shared_perm(get_git_dir());
241 adjust_shared_perm(git_path("refs"));
242 adjust_shared_perm(git_path("refs/heads"));
243 adjust_shared_perm(git_path("refs/tags"));
247 * Create the default symlink from ".git/HEAD" to the "master"
248 * branch, if it does not exist yet.
250 strcpy(path
+ len
, "HEAD");
251 reinit
= (!access(path
, R_OK
)
252 || readlink(path
, junk
, sizeof(junk
)-1) != -1);
254 if (create_symref("HEAD", "refs/heads/master", NULL
) < 0)
258 /* This forces creation of new config file */
259 sprintf(repo_version_string
, "%d", GIT_REPO_VERSION
);
260 git_config_set("core.repositoryformatversion", repo_version_string
);
263 strcpy(path
+ len
, "config");
265 /* Check filemode trustability */
266 filemode
= TEST_FILEMODE
;
267 if (TEST_FILEMODE
&& !lstat(path
, &st1
)) {
269 filemode
= (!chmod(path
, st1
.st_mode
^ S_IXUSR
) &&
270 !lstat(path
, &st2
) &&
271 st1
.st_mode
!= st2
.st_mode
);
273 git_config_set("core.filemode", filemode
? "true" : "false");
275 if (is_bare_repository())
276 git_config_set("core.bare", "true");
278 const char *work_tree
= get_git_work_tree();
279 git_config_set("core.bare", "false");
280 /* allow template config file to override the default */
281 if (log_all_ref_updates
== -1)
282 git_config_set("core.logallrefupdates", "true");
283 if (needs_work_tree_config(git_dir
, work_tree
))
284 git_config_set("core.worktree", work_tree
);
288 /* Check if symlink is supported in the work tree */
290 strcpy(path
+ len
, "tXXXXXX");
291 if (!close(xmkstemp(path
)) &&
293 !symlink("testing", path
) &&
294 !lstat(path
, &st1
) &&
295 S_ISLNK(st1
.st_mode
))
296 unlink(path
); /* good */
298 git_config_set("core.symlinks", "false");
300 /* Check if the filesystem is case-insensitive */
302 strcpy(path
+ len
, "CoNfIg");
303 if (!access(path
, F_OK
))
304 git_config_set("core.ignorecase", "true");
305 probe_utf8_pathname_composition(path
, len
);
311 static void create_object_directory(void)
313 const char *object_directory
= get_object_directory();
314 int len
= strlen(object_directory
);
315 char *path
= xmalloc(len
+ 40);
317 memcpy(path
, object_directory
, len
);
319 safe_create_dir(object_directory
, 1);
320 strcpy(path
+len
, "/pack");
321 safe_create_dir(path
, 1);
322 strcpy(path
+len
, "/info");
323 safe_create_dir(path
, 1);
328 int set_git_dir_init(const char *git_dir
, const char *real_git_dir
,
334 if (!exist_ok
&& !stat(git_dir
, &st
))
335 die(_("%s already exists"), git_dir
);
337 if (!exist_ok
&& !stat(real_git_dir
, &st
))
338 die(_("%s already exists"), real_git_dir
);
341 * make sure symlinks are resolved because we'll be
342 * moving the target repo later on in separate_git_dir()
344 git_link
= xstrdup(real_path(git_dir
));
347 real_git_dir
= real_path(git_dir
);
350 set_git_dir(real_path(real_git_dir
));
354 static void separate_git_dir(const char *git_dir
)
359 if (!stat(git_link
, &st
)) {
362 if (S_ISREG(st
.st_mode
))
363 src
= read_gitfile(git_link
);
364 else if (S_ISDIR(st
.st_mode
))
367 die(_("unable to handle file type %d"), (int)st
.st_mode
);
369 if (rename(src
, git_dir
))
370 die_errno(_("unable to move %s to %s"), src
, git_dir
);
373 fp
= fopen(git_link
, "w");
375 die(_("Could not create git link %s"), git_link
);
376 fprintf(fp
, "gitdir: %s\n", git_dir
);
380 int init_db(const char *template_dir
, unsigned int flags
)
383 const char *git_dir
= get_git_dir();
386 separate_git_dir(git_dir
);
388 safe_create_dir(git_dir
, 0);
390 init_is_bare_repository
= is_bare_repository();
392 /* Check to see if the repository version is right.
393 * Note that a newly created repository does not have
394 * config file, so this will not fail. What we are catching
395 * is an attempt to reinitialize new repository with an old tool.
397 check_repository_format();
399 reinit
= create_default_files(template_dir
);
401 create_object_directory();
403 if (shared_repository
) {
405 /* We do not spell "group" and such, so that
406 * the configuration can be read by older version
407 * of git. Note, we use octal numbers for new share modes,
408 * and compatibility values for PERM_GROUP and
411 if (shared_repository
< 0)
412 /* force to the mode value */
413 sprintf(buf
, "0%o", -shared_repository
);
414 else if (shared_repository
== PERM_GROUP
)
415 sprintf(buf
, "%d", OLD_PERM_GROUP
);
416 else if (shared_repository
== PERM_EVERYBODY
)
417 sprintf(buf
, "%d", OLD_PERM_EVERYBODY
);
420 git_config_set("core.sharedrepository", buf
);
421 git_config_set("receive.denyNonFastforwards", "true");
424 if (!(flags
& INIT_DB_QUIET
)) {
425 int len
= strlen(git_dir
);
427 /* TRANSLATORS: The first '%s' is either "Reinitialized
428 existing" or "Initialized empty", the second " shared" or
429 "", and the last '%s%s' is the verbatim directory name. */
430 printf(_("%s%s Git repository in %s%s\n"),
431 reinit
? _("Reinitialized existing") : _("Initialized empty"),
432 shared_repository
? _(" shared") : "",
433 git_dir
, len
&& git_dir
[len
-1] != '/' ? "/" : "");
439 static int guess_repository_type(const char *git_dir
)
445 * "GIT_DIR=. git init" is always bare.
446 * "GIT_DIR=`pwd` git init" too.
448 if (!strcmp(".", git_dir
))
450 if (!getcwd(cwd
, sizeof(cwd
)))
451 die_errno(_("cannot tell cwd"));
452 if (!strcmp(git_dir
, cwd
))
455 * "GIT_DIR=.git or GIT_DIR=something/.git is usually not.
457 if (!strcmp(git_dir
, ".git"))
459 slash
= strrchr(git_dir
, '/');
460 if (slash
&& !strcmp(slash
, "/.git"))
464 * Otherwise it is often bare. At this point
465 * we are just guessing.
470 static int shared_callback(const struct option
*opt
, const char *arg
, int unset
)
472 *((int *) opt
->value
) = (arg
) ? git_config_perm("arg", arg
) : PERM_GROUP
;
476 static const char *const init_db_usage
[] = {
477 N_("git init [-q | --quiet] [--bare] [--template=<template-directory>] [--shared[=<permissions>]] [directory]"),
482 * If you want to, you can share the DB area with any number of branches.
483 * That has advantages: you can save space by sharing all the SHA1 objects.
484 * On the other hand, it might just make lookup slower and messier. You
485 * be the judge. The default case is to have one DB per managed directory.
487 int cmd_init_db(int argc
, const char **argv
, const char *prefix
)
490 const char *real_git_dir
= NULL
;
491 const char *work_tree
;
492 const char *template_dir
= NULL
;
493 unsigned int flags
= 0;
494 const struct option init_db_options
[] = {
495 OPT_STRING(0, "template", &template_dir
, N_("template-directory"),
496 N_("directory from which templates will be used")),
497 OPT_SET_INT(0, "bare", &is_bare_repository_cfg
,
498 N_("create a bare repository"), 1),
499 { OPTION_CALLBACK
, 0, "shared", &init_shared_repository
,
501 N_("specify that the git repository is to be shared amongst several users"),
502 PARSE_OPT_OPTARG
| PARSE_OPT_NONEG
, shared_callback
, 0},
503 OPT_BIT('q', "quiet", &flags
, N_("be quiet"), INIT_DB_QUIET
),
504 OPT_STRING(0, "separate-git-dir", &real_git_dir
, N_("gitdir"),
505 N_("separate git dir from working tree")),
509 argc
= parse_options(argc
, argv
, prefix
, init_db_options
, init_db_usage
, 0);
511 if (real_git_dir
&& !is_absolute_path(real_git_dir
))
512 real_git_dir
= xstrdup(real_path(real_git_dir
));
517 if (chdir(argv
[0]) < 0) {
521 * At this point we haven't read any configuration,
522 * and we know shared_repository should always be 0;
523 * but just in case we play safe.
525 saved
= shared_repository
;
526 shared_repository
= 0;
527 switch (safe_create_leading_directories_const(argv
[0])) {
535 die_errno(_("cannot mkdir %s"), argv
[0]);
538 shared_repository
= saved
;
539 if (mkdir(argv
[0], 0777) < 0)
540 die_errno(_("cannot mkdir %s"), argv
[0]);
544 die_errno(_("cannot chdir to %s"), argv
[0]);
546 } else if (0 < argc
) {
547 usage(init_db_usage
[0]);
549 if (is_bare_repository_cfg
== 1) {
550 static char git_dir
[PATH_MAX
+1];
552 setenv(GIT_DIR_ENVIRONMENT
,
553 getcwd(git_dir
, sizeof(git_dir
)), argc
> 0);
556 if (init_shared_repository
!= -1)
557 shared_repository
= init_shared_repository
;
560 * GIT_WORK_TREE makes sense only in conjunction with GIT_DIR
561 * without --bare. Catch the error early.
563 git_dir
= getenv(GIT_DIR_ENVIRONMENT
);
564 work_tree
= getenv(GIT_WORK_TREE_ENVIRONMENT
);
565 if ((!git_dir
|| is_bare_repository_cfg
== 1) && work_tree
)
566 die(_("%s (or --work-tree=<directory>) not allowed without "
567 "specifying %s (or --git-dir=<directory>)"),
568 GIT_WORK_TREE_ENVIRONMENT
,
569 GIT_DIR_ENVIRONMENT
);
572 * Set up the default .git directory contents
575 git_dir
= DEFAULT_GIT_DIR_ENVIRONMENT
;
577 if (is_bare_repository_cfg
< 0)
578 is_bare_repository_cfg
= guess_repository_type(git_dir
);
580 if (!is_bare_repository_cfg
) {
581 const char *git_dir_parent
= strrchr(git_dir
, '/');
582 if (git_dir_parent
) {
583 char *rel
= xstrndup(git_dir
, git_dir_parent
- git_dir
);
584 git_work_tree_cfg
= xstrdup(real_path(rel
));
587 if (!git_work_tree_cfg
) {
588 git_work_tree_cfg
= xcalloc(PATH_MAX
, 1);
589 if (!getcwd(git_work_tree_cfg
, PATH_MAX
))
590 die_errno (_("Cannot access current working directory"));
593 set_git_work_tree(real_path(work_tree
));
595 set_git_work_tree(git_work_tree_cfg
);
596 if (access(get_git_work_tree(), X_OK
))
597 die_errno (_("Cannot access work tree '%s'"),
598 get_git_work_tree());
602 set_git_work_tree(real_path(work_tree
));
605 set_git_dir_init(git_dir
, real_git_dir
, 1);
607 return init_db(template_dir
, flags
);