Merge branch 'ik/gitweb-force-highlight'
[git/git.git] / builtin / init-db.c
1 /*
2 * GIT - The information manager from hell
3 *
4 * Copyright (C) Linus Torvalds, 2005
5 */
6 #include "cache.h"
7 #include "refs.h"
8 #include "builtin.h"
9 #include "exec_cmd.h"
10 #include "parse-options.h"
11
12 #ifndef DEFAULT_GIT_TEMPLATE_DIR
13 #define DEFAULT_GIT_TEMPLATE_DIR "/usr/share/git-core/templates"
14 #endif
15
16 #ifdef NO_TRUSTABLE_FILEMODE
17 #define TEST_FILEMODE 0
18 #else
19 #define TEST_FILEMODE 1
20 #endif
21
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;
26
27 static void copy_templates_1(struct strbuf *path, struct strbuf *template,
28 DIR *dir)
29 {
30 size_t path_baselen = path->len;
31 size_t template_baselen = template->len;
32 struct dirent *de;
33
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.
40 */
41 safe_create_dir(path->buf, 1);
42 while ((de = readdir(dir)) != NULL) {
43 struct stat st_git, st_template;
44 int exists = 0;
45
46 strbuf_setlen(path, path_baselen);
47 strbuf_setlen(template, template_baselen);
48
49 if (de->d_name[0] == '.')
50 continue;
51 strbuf_addstr(path, de->d_name);
52 strbuf_addstr(template, de->d_name);
53 if (lstat(path->buf, &st_git)) {
54 if (errno != ENOENT)
55 die_errno(_("cannot stat '%s'"), path->buf);
56 }
57 else
58 exists = 1;
59
60 if (lstat(template->buf, &st_template))
61 die_errno(_("cannot stat template '%s'"), template->buf);
62
63 if (S_ISDIR(st_template.st_mode)) {
64 DIR *subdir = opendir(template->buf);
65 if (!subdir)
66 die_errno(_("cannot opendir '%s'"), template->buf);
67 strbuf_addch(path, '/');
68 strbuf_addch(template, '/');
69 copy_templates_1(path, template, subdir);
70 closedir(subdir);
71 }
72 else if (exists)
73 continue;
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'"),
80 lnk.buf, path->buf);
81 strbuf_release(&lnk);
82 }
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);
87 }
88 else
89 error(_("ignoring template %s"), template->buf);
90 }
91 }
92
93 static void copy_templates(const char *template_dir)
94 {
95 struct strbuf path = STRBUF_INIT;
96 struct strbuf template_path = STRBUF_INIT;
97 size_t template_len;
98 struct repository_format template_format;
99 struct strbuf err = STRBUF_INIT;
100 DIR *dir;
101 char *to_free = NULL;
102
103 if (!template_dir)
104 template_dir = getenv(TEMPLATE_DIR_ENVIRONMENT);
105 if (!template_dir)
106 template_dir = init_db_template_dir;
107 if (!template_dir)
108 template_dir = to_free = system_path(DEFAULT_GIT_TEMPLATE_DIR);
109 if (!template_dir[0]) {
110 free(to_free);
111 return;
112 }
113
114 strbuf_addstr(&template_path, template_dir);
115 strbuf_complete(&template_path, '/');
116 template_len = template_path.len;
117
118 dir = opendir(template_path.buf);
119 if (!dir) {
120 warning(_("templates not found %s"), template_dir);
121 goto free_return;
122 }
123
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);
128
129 /*
130 * No mention of version at all is OK, but anything else should be
131 * verified.
132 */
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;
139 }
140
141 strbuf_addstr(&path, get_git_dir());
142 strbuf_complete(&path, '/');
143 copy_templates_1(&path, &template_path, dir);
144 close_free_return:
145 closedir(dir);
146 free_return:
147 free(to_free);
148 strbuf_release(&path);
149 strbuf_release(&template_path);
150 }
151
152 static int git_init_db_config(const char *k, const char *v, void *cb)
153 {
154 if (!strcmp(k, "init.templatedir"))
155 return git_config_pathname(&init_db_template_dir, k, v);
156
157 return 0;
158 }
159
160 /*
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.
163 */
164 static int needs_work_tree_config(const char *git_dir, const char *work_tree)
165 {
166 if (!strcmp(work_tree, "/") && !strcmp(git_dir, "/.git"))
167 return 0;
168 if (skip_prefix(git_dir, work_tree, &git_dir) &&
169 !strcmp(git_dir, "/.git"))
170 return 0;
171 return 1;
172 }
173
174 static int create_default_files(const char *template_path)
175 {
176 struct stat st1;
177 struct strbuf buf = STRBUF_INIT;
178 char *path;
179 char repo_version_string[10];
180 char junk[2];
181 int reinit;
182 int filemode;
183 struct strbuf err = STRBUF_INIT;
184
185 /* Just look for `init.templatedir` */
186 git_config(git_init_db_config, NULL);
187
188 /*
189 * First copy the templates -- we might have the default
190 * config file there, in which case we would want to read
191 * from it after installing.
192 *
193 * Before reading that config, we also need to clear out any cached
194 * values (since we've just potentially changed what's available on
195 * disk).
196 */
197 copy_templates(template_path);
198 git_config_clear();
199 reset_shared_repository();
200 git_config(git_default_config, NULL);
201
202 /*
203 * We must make sure command-line options continue to override any
204 * values we might have just re-read from the config.
205 */
206 is_bare_repository_cfg = init_is_bare_repository;
207 if (init_shared_repository != -1)
208 set_shared_repository(init_shared_repository);
209
210 /*
211 * We would have created the above under user's umask -- under
212 * shared-repository settings, we would need to fix them up.
213 */
214 if (get_shared_repository()) {
215 adjust_shared_perm(get_git_dir());
216 }
217
218 /*
219 * We need to create a "refs" dir in any case so that older
220 * versions of git can tell that this is a repository.
221 */
222 safe_create_dir(git_path("refs"), 1);
223 adjust_shared_perm(git_path("refs"));
224
225 if (refs_init_db(&err))
226 die("failed to set up refs db: %s", err.buf);
227
228 /*
229 * Create the default symlink from ".git/HEAD" to the "master"
230 * branch, if it does not exist yet.
231 */
232 path = git_path_buf(&buf, "HEAD");
233 reinit = (!access(path, R_OK)
234 || readlink(path, junk, sizeof(junk)-1) != -1);
235 if (!reinit) {
236 if (create_symref("HEAD", "refs/heads/master", NULL) < 0)
237 exit(1);
238 }
239
240 /* This forces creation of new config file */
241 xsnprintf(repo_version_string, sizeof(repo_version_string),
242 "%d", GIT_REPO_VERSION);
243 git_config_set("core.repositoryformatversion", repo_version_string);
244
245 /* Check filemode trustability */
246 path = git_path_buf(&buf, "config");
247 filemode = TEST_FILEMODE;
248 if (TEST_FILEMODE && !lstat(path, &st1)) {
249 struct stat st2;
250 filemode = (!chmod(path, st1.st_mode ^ S_IXUSR) &&
251 !lstat(path, &st2) &&
252 st1.st_mode != st2.st_mode &&
253 !chmod(path, st1.st_mode));
254 if (filemode && !reinit && (st1.st_mode & S_IXUSR))
255 filemode = 0;
256 }
257 git_config_set("core.filemode", filemode ? "true" : "false");
258
259 if (is_bare_repository())
260 git_config_set("core.bare", "true");
261 else {
262 const char *work_tree = get_git_work_tree();
263 git_config_set("core.bare", "false");
264 /* allow template config file to override the default */
265 if (log_all_ref_updates == -1)
266 git_config_set("core.logallrefupdates", "true");
267 if (needs_work_tree_config(get_git_dir(), work_tree))
268 git_config_set("core.worktree", work_tree);
269 }
270
271 if (!reinit) {
272 /* Check if symlink is supported in the work tree */
273 path = git_path_buf(&buf, "tXXXXXX");
274 if (!close(xmkstemp(path)) &&
275 !unlink(path) &&
276 !symlink("testing", path) &&
277 !lstat(path, &st1) &&
278 S_ISLNK(st1.st_mode))
279 unlink(path); /* good */
280 else
281 git_config_set("core.symlinks", "false");
282
283 /* Check if the filesystem is case-insensitive */
284 path = git_path_buf(&buf, "CoNfIg");
285 if (!access(path, F_OK))
286 git_config_set("core.ignorecase", "true");
287 probe_utf8_pathname_composition();
288 }
289
290 strbuf_release(&buf);
291 return reinit;
292 }
293
294 static void create_object_directory(void)
295 {
296 struct strbuf path = STRBUF_INIT;
297 size_t baselen;
298
299 strbuf_addstr(&path, get_object_directory());
300 baselen = path.len;
301
302 safe_create_dir(path.buf, 1);
303
304 strbuf_setlen(&path, baselen);
305 strbuf_addstr(&path, "/pack");
306 safe_create_dir(path.buf, 1);
307
308 strbuf_setlen(&path, baselen);
309 strbuf_addstr(&path, "/info");
310 safe_create_dir(path.buf, 1);
311
312 strbuf_release(&path);
313 }
314
315 int set_git_dir_init(const char *git_dir, const char *real_git_dir,
316 int exist_ok)
317 {
318 if (real_git_dir) {
319 struct stat st;
320
321 if (!exist_ok && !stat(git_dir, &st))
322 die(_("%s already exists"), git_dir);
323
324 if (!exist_ok && !stat(real_git_dir, &st))
325 die(_("%s already exists"), real_git_dir);
326
327 /*
328 * make sure symlinks are resolved because we'll be
329 * moving the target repo later on in separate_git_dir()
330 */
331 git_link = xstrdup(real_path(git_dir));
332 set_git_dir(real_path(real_git_dir));
333 }
334 else {
335 set_git_dir(real_path(git_dir));
336 git_link = NULL;
337 }
338 startup_info->have_repository = 1;
339 return 0;
340 }
341
342 static void separate_git_dir(const char *git_dir)
343 {
344 struct stat st;
345
346 if (!stat(git_link, &st)) {
347 const char *src;
348
349 if (S_ISREG(st.st_mode))
350 src = read_gitfile(git_link);
351 else if (S_ISDIR(st.st_mode))
352 src = git_link;
353 else
354 die(_("unable to handle file type %d"), (int)st.st_mode);
355
356 if (rename(src, git_dir))
357 die_errno(_("unable to move %s to %s"), src, git_dir);
358 }
359
360 write_file(git_link, "gitdir: %s", git_dir);
361 }
362
363 int init_db(const char *template_dir, unsigned int flags)
364 {
365 int reinit;
366 const char *git_dir = get_git_dir();
367
368 if (git_link)
369 separate_git_dir(git_dir);
370
371 safe_create_dir(git_dir, 0);
372
373 init_is_bare_repository = is_bare_repository();
374
375 /* Check to see if the repository version is right.
376 * Note that a newly created repository does not have
377 * config file, so this will not fail. What we are catching
378 * is an attempt to reinitialize new repository with an old tool.
379 */
380 check_repository_format();
381
382 reinit = create_default_files(template_dir);
383
384 create_object_directory();
385
386 if (get_shared_repository()) {
387 char buf[10];
388 /* We do not spell "group" and such, so that
389 * the configuration can be read by older version
390 * of git. Note, we use octal numbers for new share modes,
391 * and compatibility values for PERM_GROUP and
392 * PERM_EVERYBODY.
393 */
394 if (get_shared_repository() < 0)
395 /* force to the mode value */
396 xsnprintf(buf, sizeof(buf), "0%o", -get_shared_repository());
397 else if (get_shared_repository() == PERM_GROUP)
398 xsnprintf(buf, sizeof(buf), "%d", OLD_PERM_GROUP);
399 else if (get_shared_repository() == PERM_EVERYBODY)
400 xsnprintf(buf, sizeof(buf), "%d", OLD_PERM_EVERYBODY);
401 else
402 die("BUG: invalid value for shared_repository");
403 git_config_set("core.sharedrepository", buf);
404 git_config_set("receive.denyNonFastforwards", "true");
405 }
406
407 if (!(flags & INIT_DB_QUIET)) {
408 int len = strlen(git_dir);
409
410 if (reinit)
411 printf(get_shared_repository()
412 ? _("Reinitialized existing shared Git repository in %s%s\n")
413 : _("Reinitialized existing Git repository in %s%s\n"),
414 git_dir, len && git_dir[len-1] != '/' ? "/" : "");
415 else
416 printf(get_shared_repository()
417 ? _("Initialized empty shared Git repository in %s%s\n")
418 : _("Initialized empty Git repository in %s%s\n"),
419 git_dir, len && git_dir[len-1] != '/' ? "/" : "");
420 }
421
422 return 0;
423 }
424
425 static int guess_repository_type(const char *git_dir)
426 {
427 const char *slash;
428 char *cwd;
429 int cwd_is_git_dir;
430
431 /*
432 * "GIT_DIR=. git init" is always bare.
433 * "GIT_DIR=`pwd` git init" too.
434 */
435 if (!strcmp(".", git_dir))
436 return 1;
437 cwd = xgetcwd();
438 cwd_is_git_dir = !strcmp(git_dir, cwd);
439 free(cwd);
440 if (cwd_is_git_dir)
441 return 1;
442 /*
443 * "GIT_DIR=.git or GIT_DIR=something/.git is usually not.
444 */
445 if (!strcmp(git_dir, ".git"))
446 return 0;
447 slash = strrchr(git_dir, '/');
448 if (slash && !strcmp(slash, "/.git"))
449 return 0;
450
451 /*
452 * Otherwise it is often bare. At this point
453 * we are just guessing.
454 */
455 return 1;
456 }
457
458 static int shared_callback(const struct option *opt, const char *arg, int unset)
459 {
460 *((int *) opt->value) = (arg) ? git_config_perm("arg", arg) : PERM_GROUP;
461 return 0;
462 }
463
464 static const char *const init_db_usage[] = {
465 N_("git init [-q | --quiet] [--bare] [--template=<template-directory>] [--shared[=<permissions>]] [<directory>]"),
466 NULL
467 };
468
469 /*
470 * If you want to, you can share the DB area with any number of branches.
471 * That has advantages: you can save space by sharing all the SHA1 objects.
472 * On the other hand, it might just make lookup slower and messier. You
473 * be the judge. The default case is to have one DB per managed directory.
474 */
475 int cmd_init_db(int argc, const char **argv, const char *prefix)
476 {
477 const char *git_dir;
478 const char *real_git_dir = NULL;
479 const char *work_tree;
480 const char *template_dir = NULL;
481 unsigned int flags = 0;
482 const struct option init_db_options[] = {
483 OPT_STRING(0, "template", &template_dir, N_("template-directory"),
484 N_("directory from which templates will be used")),
485 OPT_SET_INT(0, "bare", &is_bare_repository_cfg,
486 N_("create a bare repository"), 1),
487 { OPTION_CALLBACK, 0, "shared", &init_shared_repository,
488 N_("permissions"),
489 N_("specify that the git repository is to be shared amongst several users"),
490 PARSE_OPT_OPTARG | PARSE_OPT_NONEG, shared_callback, 0},
491 OPT_BIT('q', "quiet", &flags, N_("be quiet"), INIT_DB_QUIET),
492 OPT_STRING(0, "separate-git-dir", &real_git_dir, N_("gitdir"),
493 N_("separate git dir from working tree")),
494 OPT_END()
495 };
496
497 argc = parse_options(argc, argv, prefix, init_db_options, init_db_usage, 0);
498
499 if (real_git_dir && !is_absolute_path(real_git_dir))
500 real_git_dir = xstrdup(real_path(real_git_dir));
501
502 if (argc == 1) {
503 int mkdir_tried = 0;
504 retry:
505 if (chdir(argv[0]) < 0) {
506 if (!mkdir_tried) {
507 int saved;
508 /*
509 * At this point we haven't read any configuration,
510 * and we know shared_repository should always be 0;
511 * but just in case we play safe.
512 */
513 saved = get_shared_repository();
514 set_shared_repository(0);
515 switch (safe_create_leading_directories_const(argv[0])) {
516 case SCLD_OK:
517 case SCLD_PERMS:
518 break;
519 case SCLD_EXISTS:
520 errno = EEXIST;
521 /* fallthru */
522 default:
523 die_errno(_("cannot mkdir %s"), argv[0]);
524 break;
525 }
526 set_shared_repository(saved);
527 if (mkdir(argv[0], 0777) < 0)
528 die_errno(_("cannot mkdir %s"), argv[0]);
529 mkdir_tried = 1;
530 goto retry;
531 }
532 die_errno(_("cannot chdir to %s"), argv[0]);
533 }
534 } else if (0 < argc) {
535 usage(init_db_usage[0]);
536 }
537 if (is_bare_repository_cfg == 1) {
538 char *cwd = xgetcwd();
539 setenv(GIT_DIR_ENVIRONMENT, cwd, argc > 0);
540 free(cwd);
541 }
542
543 if (init_shared_repository != -1)
544 set_shared_repository(init_shared_repository);
545
546 /*
547 * GIT_WORK_TREE makes sense only in conjunction with GIT_DIR
548 * without --bare. Catch the error early.
549 */
550 git_dir = getenv(GIT_DIR_ENVIRONMENT);
551 work_tree = getenv(GIT_WORK_TREE_ENVIRONMENT);
552 if ((!git_dir || is_bare_repository_cfg == 1) && work_tree)
553 die(_("%s (or --work-tree=<directory>) not allowed without "
554 "specifying %s (or --git-dir=<directory>)"),
555 GIT_WORK_TREE_ENVIRONMENT,
556 GIT_DIR_ENVIRONMENT);
557
558 /*
559 * Set up the default .git directory contents
560 */
561 if (!git_dir)
562 git_dir = DEFAULT_GIT_DIR_ENVIRONMENT;
563
564 if (is_bare_repository_cfg < 0)
565 is_bare_repository_cfg = guess_repository_type(git_dir);
566
567 if (!is_bare_repository_cfg) {
568 const char *git_dir_parent = strrchr(git_dir, '/');
569 if (git_dir_parent) {
570 char *rel = xstrndup(git_dir, git_dir_parent - git_dir);
571 git_work_tree_cfg = xstrdup(real_path(rel));
572 free(rel);
573 }
574 if (!git_work_tree_cfg)
575 git_work_tree_cfg = xgetcwd();
576 if (work_tree)
577 set_git_work_tree(work_tree);
578 else
579 set_git_work_tree(git_work_tree_cfg);
580 if (access(get_git_work_tree(), X_OK))
581 die_errno (_("Cannot access work tree '%s'"),
582 get_git_work_tree());
583 }
584 else {
585 if (work_tree)
586 set_git_work_tree(work_tree);
587 }
588
589 set_git_dir_init(git_dir, real_git_dir, 1);
590
591 return init_db(template_dir, flags);
592 }