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
;
25 static void safe_create_dir(const char *dir
, int share
)
27 if (mkdir(dir
, 0777) < 0) {
28 if (errno
!= EEXIST
) {
33 else if (share
&& adjust_shared_perm(dir
))
34 die("Could not make %s writable by group", dir
);
37 static void copy_templates_1(char *path
, int baselen
,
38 char *template, int template_baselen
,
43 /* Note: if ".git/hooks" file exists in the repository being
44 * re-initialized, /etc/core-git/templates/hooks/update would
45 * cause "git init" to fail here. I think this is sane but
46 * it means that the set of templates we ship by default, along
47 * with the way the namespace under .git/ is organized, should
48 * be really carefully chosen.
50 safe_create_dir(path
, 1);
51 while ((de
= readdir(dir
)) != NULL
) {
52 struct stat st_git
, st_template
;
56 if (de
->d_name
[0] == '.')
58 namelen
= strlen(de
->d_name
);
59 if ((PATH_MAX
<= baselen
+ namelen
) ||
60 (PATH_MAX
<= template_baselen
+ namelen
))
61 die("insanely long template name %s", de
->d_name
);
62 memcpy(path
+ baselen
, de
->d_name
, namelen
+1);
63 memcpy(template + template_baselen
, de
->d_name
, namelen
+1);
64 if (lstat(path
, &st_git
)) {
66 die_errno("cannot stat '%s'", path
);
71 if (lstat(template, &st_template
))
72 die_errno("cannot stat template '%s'", template);
74 if (S_ISDIR(st_template
.st_mode
)) {
75 DIR *subdir
= opendir(template);
76 int baselen_sub
= baselen
+ namelen
;
77 int template_baselen_sub
= template_baselen
+ namelen
;
79 die_errno("cannot opendir '%s'", template);
81 template[template_baselen_sub
++] = '/';
83 template[template_baselen_sub
] = 0;
84 copy_templates_1(path
, baselen_sub
,
85 template, template_baselen_sub
,
91 else if (S_ISLNK(st_template
.st_mode
)) {
94 len
= readlink(template, lnk
, sizeof(lnk
));
96 die_errno("cannot readlink '%s'", template);
97 if (sizeof(lnk
) <= len
)
98 die("insanely long symlink %s", template);
100 if (symlink(lnk
, path
))
101 die_errno("cannot symlink '%s' '%s'", lnk
, path
);
103 else if (S_ISREG(st_template
.st_mode
)) {
104 if (copy_file(path
, template, st_template
.st_mode
))
105 die_errno("cannot copy '%s' to '%s'", template,
109 error("ignoring template %s", template);
113 static void copy_templates(const char *template_dir
)
116 char template_path
[PATH_MAX
];
119 const char *git_dir
= get_git_dir();
120 int len
= strlen(git_dir
);
123 template_dir
= getenv(TEMPLATE_DIR_ENVIRONMENT
);
125 template_dir
= init_db_template_dir
;
127 template_dir
= system_path(DEFAULT_GIT_TEMPLATE_DIR
);
128 if (!template_dir
[0])
130 template_len
= strlen(template_dir
);
131 if (PATH_MAX
<= (template_len
+strlen("/config")))
132 die("insanely long template path %s", template_dir
);
133 strcpy(template_path
, template_dir
);
134 if (template_path
[template_len
-1] != '/') {
135 template_path
[template_len
++] = '/';
136 template_path
[template_len
] = 0;
138 dir
= opendir(template_path
);
140 warning("templates not found %s", template_dir
);
144 /* Make sure that template is from the correct vintage */
145 strcpy(template_path
+ template_len
, "config");
146 repository_format_version
= 0;
147 git_config_from_file(check_repository_format_version
,
148 template_path
, NULL
);
149 template_path
[template_len
] = 0;
151 if (repository_format_version
&&
152 repository_format_version
!= GIT_REPO_VERSION
) {
153 warning("not copying templates of "
154 "a wrong format version %d from '%s'",
155 repository_format_version
,
161 memcpy(path
, git_dir
, len
);
162 if (len
&& path
[len
- 1] != '/')
165 copy_templates_1(path
, len
,
166 template_path
, template_len
,
171 static int git_init_db_config(const char *k
, const char *v
, void *cb
)
173 if (!strcmp(k
, "init.templatedir"))
174 return git_config_pathname(&init_db_template_dir
, k
, v
);
179 static int create_default_files(const char *template_path
)
181 const char *git_dir
= get_git_dir();
182 unsigned len
= strlen(git_dir
);
183 static char path
[PATH_MAX
];
185 char repo_version_string
[10];
190 if (len
> sizeof(path
)-50)
191 die("insane git directory %s", git_dir
);
192 memcpy(path
, git_dir
, len
);
194 if (len
&& path
[len
-1] != '/')
198 * Create .git/refs/{heads,tags}
200 safe_create_dir(git_path("refs"), 1);
201 safe_create_dir(git_path("refs/heads"), 1);
202 safe_create_dir(git_path("refs/tags"), 1);
204 /* Just look for `init.templatedir` */
205 git_config(git_init_db_config
, NULL
);
207 /* First copy the templates -- we might have the default
208 * config file there, in which case we would want to read
209 * from it after installing.
211 copy_templates(template_path
);
213 git_config(git_default_config
, NULL
);
214 is_bare_repository_cfg
= init_is_bare_repository
;
216 /* reading existing config may have overwrote it */
217 if (init_shared_repository
!= -1)
218 shared_repository
= init_shared_repository
;
221 * We would have created the above under user's umask -- under
222 * shared-repository settings, we would need to fix them up.
224 if (shared_repository
) {
225 adjust_shared_perm(get_git_dir());
226 adjust_shared_perm(git_path("refs"));
227 adjust_shared_perm(git_path("refs/heads"));
228 adjust_shared_perm(git_path("refs/tags"));
232 * Create the default symlink from ".git/HEAD" to the "master"
233 * branch, if it does not exist yet.
235 strcpy(path
+ len
, "HEAD");
236 reinit
= (!access(path
, R_OK
)
237 || readlink(path
, junk
, sizeof(junk
)-1) != -1);
239 if (create_symref("HEAD", "refs/heads/master", NULL
) < 0)
243 /* This forces creation of new config file */
244 sprintf(repo_version_string
, "%d", GIT_REPO_VERSION
);
245 git_config_set("core.repositoryformatversion", repo_version_string
);
248 strcpy(path
+ len
, "config");
250 /* Check filemode trustability */
251 filemode
= TEST_FILEMODE
;
252 if (TEST_FILEMODE
&& !lstat(path
, &st1
)) {
254 filemode
= (!chmod(path
, st1
.st_mode
^ S_IXUSR
) &&
255 !lstat(path
, &st2
) &&
256 st1
.st_mode
!= st2
.st_mode
);
258 git_config_set("core.filemode", filemode
? "true" : "false");
260 if (is_bare_repository())
261 git_config_set("core.bare", "true");
263 const char *work_tree
= get_git_work_tree();
264 git_config_set("core.bare", "false");
265 /* allow template config file to override the default */
266 if (log_all_ref_updates
== -1)
267 git_config_set("core.logallrefupdates", "true");
268 if (prefixcmp(git_dir
, work_tree
) ||
269 strcmp(git_dir
+ strlen(work_tree
), "/.git")) {
270 git_config_set("core.worktree", work_tree
);
275 /* Check if symlink is supported in the work tree */
277 strcpy(path
+ len
, "tXXXXXX");
278 if (!close(xmkstemp(path
)) &&
280 !symlink("testing", path
) &&
281 !lstat(path
, &st1
) &&
282 S_ISLNK(st1
.st_mode
))
283 unlink(path
); /* good */
285 git_config_set("core.symlinks", "false");
287 /* Check if the filesystem is case-insensitive */
289 strcpy(path
+ len
, "CoNfIg");
290 if (!access(path
, F_OK
))
291 git_config_set("core.ignorecase", "true");
297 static void create_object_directory(void)
299 const char *object_directory
= get_object_directory();
300 int len
= strlen(object_directory
);
301 char *path
= xmalloc(len
+ 40);
303 memcpy(path
, object_directory
, len
);
305 safe_create_dir(object_directory
, 1);
306 strcpy(path
+len
, "/pack");
307 safe_create_dir(path
, 1);
308 strcpy(path
+len
, "/info");
309 safe_create_dir(path
, 1);
314 int init_db(const char *template_dir
, unsigned int flags
)
318 safe_create_dir(get_git_dir(), 0);
320 init_is_bare_repository
= is_bare_repository();
322 /* Check to see if the repository version is right.
323 * Note that a newly created repository does not have
324 * config file, so this will not fail. What we are catching
325 * is an attempt to reinitialize new repository with an old tool.
327 check_repository_format();
329 reinit
= create_default_files(template_dir
);
330 mark_as_git_dir(get_git_dir());
332 create_object_directory();
334 if (shared_repository
) {
336 /* We do not spell "group" and such, so that
337 * the configuration can be read by older version
338 * of git. Note, we use octal numbers for new share modes,
339 * and compatibility values for PERM_GROUP and
342 if (shared_repository
< 0)
343 /* force to the mode value */
344 sprintf(buf
, "0%o", -shared_repository
);
345 else if (shared_repository
== PERM_GROUP
)
346 sprintf(buf
, "%d", OLD_PERM_GROUP
);
347 else if (shared_repository
== PERM_EVERYBODY
)
348 sprintf(buf
, "%d", OLD_PERM_EVERYBODY
);
351 git_config_set("core.sharedrepository", buf
);
352 git_config_set("receive.denyNonFastforwards", "true");
355 if (!(flags
& INIT_DB_QUIET
)) {
356 const char *git_dir
= get_git_dir();
357 int len
= strlen(git_dir
);
358 printf("%s%s Git repository in %s%s\n",
359 reinit
? "Reinitialized existing" : "Initialized empty",
360 shared_repository
? " shared" : "",
361 git_dir
, len
&& git_dir
[len
-1] != '/' ? "/" : "");
367 static int guess_repository_type(const char *git_dir
)
373 * "GIT_DIR=. git init" is always bare.
374 * "GIT_DIR=`pwd` git init" too.
376 if (!strcmp(".", git_dir
))
378 if (!getcwd(cwd
, sizeof(cwd
)))
379 die_errno("cannot tell cwd");
380 if (!strcmp(git_dir
, cwd
))
383 * "GIT_DIR=.git or GIT_DIR=something/.git is usually not.
385 if (!strcmp(git_dir
, ".git"))
387 slash
= strrchr(git_dir
, '/');
388 if (slash
&& !strcmp(slash
, "/.git"))
392 * Otherwise it is often bare. At this point
393 * we are just guessing.
398 static int shared_callback(const struct option
*opt
, const char *arg
, int unset
)
400 *((int *) opt
->value
) = (arg
) ? git_config_perm("arg", arg
) : PERM_GROUP
;
404 static const char *const init_db_usage
[] = {
405 "git init [-q | --quiet] [--bare] [--template=<template-directory>] [--shared[=<permissions>]] [directory]",
410 * If you want to, you can share the DB area with any number of branches.
411 * That has advantages: you can save space by sharing all the SHA1 objects.
412 * On the other hand, it might just make lookup slower and messier. You
413 * be the judge. The default case is to have one DB per managed directory.
415 int cmd_init_db(int argc
, const char **argv
, const char *prefix
)
418 const char *template_dir
= NULL
;
419 unsigned int flags
= 0;
420 const struct option init_db_options
[] = {
421 OPT_STRING(0, "template", &template_dir
, "template-directory",
422 "provide the directory from which templates will be used"),
423 OPT_SET_INT(0, "bare", &is_bare_repository_cfg
,
424 "create a bare repository", 1),
425 { OPTION_CALLBACK
, 0, "shared", &init_shared_repository
,
427 "specify that the git repository is to be shared amongst several users",
428 PARSE_OPT_OPTARG
| PARSE_OPT_NONEG
, shared_callback
, 0},
429 OPT_BIT('q', "quiet", &flags
, "be quiet", INIT_DB_QUIET
),
433 argc
= parse_options(argc
, argv
, prefix
, init_db_options
, init_db_usage
, 0);
438 if (chdir(argv
[0]) < 0) {
442 * At this point we haven't read any configuration,
443 * and we know shared_repository should always be 0;
444 * but just in case we play safe.
446 saved
= shared_repository
;
447 shared_repository
= 0;
448 switch (safe_create_leading_directories_const(argv
[0])) {
453 die_errno("cannot mkdir %s", argv
[0]);
458 shared_repository
= saved
;
459 if (mkdir(argv
[0], 0777) < 0)
460 die_errno("cannot mkdir %s", argv
[0]);
464 die_errno("cannot chdir to %s", argv
[0]);
466 } else if (0 < argc
) {
467 usage(init_db_usage
[0]);
469 if (is_bare_repository_cfg
== 1) {
470 static char git_dir
[PATH_MAX
+1];
472 setenv(GIT_DIR_ENVIRONMENT
,
473 getcwd(git_dir
, sizeof(git_dir
)), argc
> 0);
476 if (init_shared_repository
!= -1)
477 shared_repository
= init_shared_repository
;
480 * GIT_WORK_TREE makes sense only in conjunction with GIT_DIR
481 * without --bare. Catch the error early.
483 git_dir
= getenv(GIT_DIR_ENVIRONMENT
);
484 if ((!git_dir
|| is_bare_repository_cfg
== 1)
485 && getenv(GIT_WORK_TREE_ENVIRONMENT
))
486 die("%s (or --work-tree=<directory>) not allowed without "
487 "specifying %s (or --git-dir=<directory>)",
488 GIT_WORK_TREE_ENVIRONMENT
,
489 GIT_DIR_ENVIRONMENT
);
492 * Set up the default .git directory contents
495 git_dir
= DEFAULT_GIT_DIR_ENVIRONMENT
;
497 if (is_bare_repository_cfg
< 0)
498 is_bare_repository_cfg
= guess_repository_type(git_dir
);
500 if (!is_bare_repository_cfg
) {
502 const char *git_dir_parent
= strrchr(git_dir
, '/');
503 if (git_dir_parent
) {
504 char *rel
= xstrndup(git_dir
, git_dir_parent
- git_dir
);
505 git_work_tree_cfg
= xstrdup(make_absolute_path(rel
));
509 if (!git_work_tree_cfg
) {
510 git_work_tree_cfg
= xcalloc(PATH_MAX
, 1);
511 if (!getcwd(git_work_tree_cfg
, PATH_MAX
))
512 die_errno ("Cannot access current working directory");
514 if (access(get_git_work_tree(), X_OK
))
515 die_errno ("Cannot access work tree '%s'",
516 get_git_work_tree());
519 set_git_dir(make_absolute_path(git_dir
));
521 return init_db(template_dir
, flags
);