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_common_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];
185 * Create .git/refs/{heads,tags}
187 safe_create_dir(git_path_buf(&buf
, "refs"), 1);
188 safe_create_dir(git_path_buf(&buf
, "refs/heads"), 1);
189 safe_create_dir(git_path_buf(&buf
, "refs/tags"), 1);
191 /* Just look for `init.templatedir` */
192 git_config(git_init_db_config
, NULL
);
195 * First copy the templates -- we might have the default
196 * config file there, in which case we would want to read
197 * from it after installing.
199 * Before reading that config, we also need to clear out any cached
200 * values (since we've just potentially changed what's available on
203 copy_templates(template_path
);
205 reset_shared_repository();
206 git_config(git_default_config
, NULL
);
209 * We must make sure command-line options continue to override any
210 * values we might have just re-read from the config.
212 is_bare_repository_cfg
= init_is_bare_repository
;
213 if (init_shared_repository
!= -1)
214 set_shared_repository(init_shared_repository
);
217 * We would have created the above under user's umask -- under
218 * shared-repository settings, we would need to fix them up.
220 if (get_shared_repository()) {
221 adjust_shared_perm(get_git_dir());
222 adjust_shared_perm(git_path_buf(&buf
, "refs"));
223 adjust_shared_perm(git_path_buf(&buf
, "refs/heads"));
224 adjust_shared_perm(git_path_buf(&buf
, "refs/tags"));
228 * Create the default symlink from ".git/HEAD" to the "master"
229 * branch, if it does not exist yet.
231 path
= git_path_buf(&buf
, "HEAD");
232 reinit
= (!access(path
, R_OK
)
233 || readlink(path
, junk
, sizeof(junk
)-1) != -1);
235 if (create_symref("HEAD", "refs/heads/master", NULL
) < 0)
239 /* This forces creation of new config file */
240 xsnprintf(repo_version_string
, sizeof(repo_version_string
),
241 "%d", GIT_REPO_VERSION
);
242 git_config_set("core.repositoryformatversion", repo_version_string
);
244 /* Check filemode trustability */
245 path
= git_path_buf(&buf
, "config");
246 filemode
= TEST_FILEMODE
;
247 if (TEST_FILEMODE
&& !lstat(path
, &st1
)) {
249 filemode
= (!chmod(path
, st1
.st_mode
^ S_IXUSR
) &&
250 !lstat(path
, &st2
) &&
251 st1
.st_mode
!= st2
.st_mode
&&
252 !chmod(path
, st1
.st_mode
));
253 if (filemode
&& !reinit
&& (st1
.st_mode
& S_IXUSR
))
256 git_config_set("core.filemode", filemode
? "true" : "false");
258 if (is_bare_repository())
259 git_config_set("core.bare", "true");
261 const char *work_tree
= get_git_work_tree();
262 git_config_set("core.bare", "false");
263 /* allow template config file to override the default */
264 if (log_all_ref_updates
== -1)
265 git_config_set("core.logallrefupdates", "true");
266 if (needs_work_tree_config(get_git_dir(), work_tree
))
267 git_config_set("core.worktree", work_tree
);
271 /* Check if symlink is supported in the work tree */
272 path
= git_path_buf(&buf
, "tXXXXXX");
273 if (!close(xmkstemp(path
)) &&
275 !symlink("testing", path
) &&
276 !lstat(path
, &st1
) &&
277 S_ISLNK(st1
.st_mode
))
278 unlink(path
); /* good */
280 git_config_set("core.symlinks", "false");
282 /* Check if the filesystem is case-insensitive */
283 path
= git_path_buf(&buf
, "CoNfIg");
284 if (!access(path
, F_OK
))
285 git_config_set("core.ignorecase", "true");
286 probe_utf8_pathname_composition();
289 strbuf_release(&buf
);
293 static void create_object_directory(void)
295 struct strbuf path
= STRBUF_INIT
;
298 strbuf_addstr(&path
, get_object_directory());
301 safe_create_dir(path
.buf
, 1);
303 strbuf_setlen(&path
, baselen
);
304 strbuf_addstr(&path
, "/pack");
305 safe_create_dir(path
.buf
, 1);
307 strbuf_setlen(&path
, baselen
);
308 strbuf_addstr(&path
, "/info");
309 safe_create_dir(path
.buf
, 1);
311 strbuf_release(&path
);
314 int set_git_dir_init(const char *git_dir
, const char *real_git_dir
,
320 if (!exist_ok
&& !stat(git_dir
, &st
))
321 die(_("%s already exists"), git_dir
);
323 if (!exist_ok
&& !stat(real_git_dir
, &st
))
324 die(_("%s already exists"), real_git_dir
);
327 * make sure symlinks are resolved because we'll be
328 * moving the target repo later on in separate_git_dir()
330 git_link
= xstrdup(real_path(git_dir
));
331 set_git_dir(real_path(real_git_dir
));
334 set_git_dir(real_path(git_dir
));
337 startup_info
->have_repository
= 1;
341 static void separate_git_dir(const char *git_dir
)
345 if (!stat(git_link
, &st
)) {
348 if (S_ISREG(st
.st_mode
))
349 src
= read_gitfile(git_link
);
350 else if (S_ISDIR(st
.st_mode
))
353 die(_("unable to handle file type %d"), (int)st
.st_mode
);
355 if (rename(src
, git_dir
))
356 die_errno(_("unable to move %s to %s"), src
, git_dir
);
359 write_file(git_link
, "gitdir: %s", git_dir
);
362 int init_db(const char *template_dir
, unsigned int flags
)
365 const char *git_dir
= get_git_dir();
368 separate_git_dir(git_dir
);
370 safe_create_dir(git_dir
, 0);
372 init_is_bare_repository
= is_bare_repository();
374 /* Check to see if the repository version is right.
375 * Note that a newly created repository does not have
376 * config file, so this will not fail. What we are catching
377 * is an attempt to reinitialize new repository with an old tool.
379 check_repository_format();
381 reinit
= create_default_files(template_dir
);
383 create_object_directory();
385 if (get_shared_repository()) {
387 /* We do not spell "group" and such, so that
388 * the configuration can be read by older version
389 * of git. Note, we use octal numbers for new share modes,
390 * and compatibility values for PERM_GROUP and
393 if (get_shared_repository() < 0)
394 /* force to the mode value */
395 xsnprintf(buf
, sizeof(buf
), "0%o", -get_shared_repository());
396 else if (get_shared_repository() == PERM_GROUP
)
397 xsnprintf(buf
, sizeof(buf
), "%d", OLD_PERM_GROUP
);
398 else if (get_shared_repository() == PERM_EVERYBODY
)
399 xsnprintf(buf
, sizeof(buf
), "%d", OLD_PERM_EVERYBODY
);
401 die("BUG: invalid value for shared_repository");
402 git_config_set("core.sharedrepository", buf
);
403 git_config_set("receive.denyNonFastforwards", "true");
406 if (!(flags
& INIT_DB_QUIET
)) {
407 int len
= strlen(git_dir
);
409 /* TRANSLATORS: The first '%s' is either "Reinitialized
410 existing" or "Initialized empty", the second " shared" or
411 "", and the last '%s%s' is the verbatim directory name. */
412 printf(_("%s%s Git repository in %s%s\n"),
413 reinit
? _("Reinitialized existing") : _("Initialized empty"),
414 get_shared_repository() ? _(" shared") : "",
415 git_dir
, len
&& git_dir
[len
-1] != '/' ? "/" : "");
421 static int guess_repository_type(const char *git_dir
)
428 * "GIT_DIR=. git init" is always bare.
429 * "GIT_DIR=`pwd` git init" too.
431 if (!strcmp(".", git_dir
))
434 cwd_is_git_dir
= !strcmp(git_dir
, cwd
);
439 * "GIT_DIR=.git or GIT_DIR=something/.git is usually not.
441 if (!strcmp(git_dir
, ".git"))
443 slash
= strrchr(git_dir
, '/');
444 if (slash
&& !strcmp(slash
, "/.git"))
448 * Otherwise it is often bare. At this point
449 * we are just guessing.
454 static int shared_callback(const struct option
*opt
, const char *arg
, int unset
)
456 *((int *) opt
->value
) = (arg
) ? git_config_perm("arg", arg
) : PERM_GROUP
;
460 static const char *const init_db_usage
[] = {
461 N_("git init [-q | --quiet] [--bare] [--template=<template-directory>] [--shared[=<permissions>]] [<directory>]"),
466 * If you want to, you can share the DB area with any number of branches.
467 * That has advantages: you can save space by sharing all the SHA1 objects.
468 * On the other hand, it might just make lookup slower and messier. You
469 * be the judge. The default case is to have one DB per managed directory.
471 int cmd_init_db(int argc
, const char **argv
, const char *prefix
)
474 const char *real_git_dir
= NULL
;
475 const char *work_tree
;
476 const char *template_dir
= NULL
;
477 unsigned int flags
= 0;
478 const struct option init_db_options
[] = {
479 OPT_STRING(0, "template", &template_dir
, N_("template-directory"),
480 N_("directory from which templates will be used")),
481 OPT_SET_INT(0, "bare", &is_bare_repository_cfg
,
482 N_("create a bare repository"), 1),
483 { OPTION_CALLBACK
, 0, "shared", &init_shared_repository
,
485 N_("specify that the git repository is to be shared amongst several users"),
486 PARSE_OPT_OPTARG
| PARSE_OPT_NONEG
, shared_callback
, 0},
487 OPT_BIT('q', "quiet", &flags
, N_("be quiet"), INIT_DB_QUIET
),
488 OPT_STRING(0, "separate-git-dir", &real_git_dir
, N_("gitdir"),
489 N_("separate git dir from working tree")),
493 argc
= parse_options(argc
, argv
, prefix
, init_db_options
, init_db_usage
, 0);
495 if (real_git_dir
&& !is_absolute_path(real_git_dir
))
496 real_git_dir
= xstrdup(real_path(real_git_dir
));
501 if (chdir(argv
[0]) < 0) {
505 * At this point we haven't read any configuration,
506 * and we know shared_repository should always be 0;
507 * but just in case we play safe.
509 saved
= get_shared_repository();
510 set_shared_repository(0);
511 switch (safe_create_leading_directories_const(argv
[0])) {
519 die_errno(_("cannot mkdir %s"), argv
[0]);
522 set_shared_repository(saved
);
523 if (mkdir(argv
[0], 0777) < 0)
524 die_errno(_("cannot mkdir %s"), argv
[0]);
528 die_errno(_("cannot chdir to %s"), argv
[0]);
530 } else if (0 < argc
) {
531 usage(init_db_usage
[0]);
533 if (is_bare_repository_cfg
== 1) {
534 char *cwd
= xgetcwd();
535 setenv(GIT_DIR_ENVIRONMENT
, cwd
, argc
> 0);
539 if (init_shared_repository
!= -1)
540 set_shared_repository(init_shared_repository
);
543 * GIT_WORK_TREE makes sense only in conjunction with GIT_DIR
544 * without --bare. Catch the error early.
546 git_dir
= getenv(GIT_DIR_ENVIRONMENT
);
547 work_tree
= getenv(GIT_WORK_TREE_ENVIRONMENT
);
548 if ((!git_dir
|| is_bare_repository_cfg
== 1) && work_tree
)
549 die(_("%s (or --work-tree=<directory>) not allowed without "
550 "specifying %s (or --git-dir=<directory>)"),
551 GIT_WORK_TREE_ENVIRONMENT
,
552 GIT_DIR_ENVIRONMENT
);
555 * Set up the default .git directory contents
558 git_dir
= DEFAULT_GIT_DIR_ENVIRONMENT
;
560 if (is_bare_repository_cfg
< 0)
561 is_bare_repository_cfg
= guess_repository_type(git_dir
);
563 if (!is_bare_repository_cfg
) {
564 const char *git_dir_parent
= strrchr(git_dir
, '/');
565 if (git_dir_parent
) {
566 char *rel
= xstrndup(git_dir
, git_dir_parent
- git_dir
);
567 git_work_tree_cfg
= xstrdup(real_path(rel
));
570 if (!git_work_tree_cfg
)
571 git_work_tree_cfg
= xgetcwd();
573 set_git_work_tree(work_tree
);
575 set_git_work_tree(git_work_tree_cfg
);
576 if (access(get_git_work_tree(), X_OK
))
577 die_errno (_("Cannot access work tree '%s'"),
578 get_git_work_tree());
582 set_git_work_tree(work_tree
);
585 set_git_dir_init(git_dir
, real_git_dir
, 1);
587 return init_db(template_dir
, flags
);