Merge branch 'td/submodule-update-quiet'
[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 "config.h"
8 #include "refs.h"
9 #include "builtin.h"
10 #include "exec-cmd.h"
11 #include "parse-options.h"
12 #include "worktree.h"
13
14 #ifndef DEFAULT_GIT_TEMPLATE_DIR
15 #define DEFAULT_GIT_TEMPLATE_DIR "/usr/share/git-core/templates"
16 #endif
17
18 #ifdef NO_TRUSTABLE_FILEMODE
19 #define TEST_FILEMODE 0
20 #else
21 #define TEST_FILEMODE 1
22 #endif
23
24 #define GIT_DEFAULT_HASH_ENVIRONMENT "GIT_DEFAULT_HASH"
25
26 static int init_is_bare_repository = 0;
27 static int init_shared_repository = -1;
28 static const char *init_db_template_dir;
29
30 static void copy_templates_1(struct strbuf *path, struct strbuf *template_path,
31                              DIR *dir)
32 {
33         size_t path_baselen = path->len;
34         size_t template_baselen = template_path->len;
35         struct dirent *de;
36
37         /* Note: if ".git/hooks" file exists in the repository being
38          * re-initialized, /etc/core-git/templates/hooks/update would
39          * cause "git init" to fail here.  I think this is sane but
40          * it means that the set of templates we ship by default, along
41          * with the way the namespace under .git/ is organized, should
42          * be really carefully chosen.
43          */
44         safe_create_dir(path->buf, 1);
45         while ((de = readdir(dir)) != NULL) {
46                 struct stat st_git, st_template;
47                 int exists = 0;
48
49                 strbuf_setlen(path, path_baselen);
50                 strbuf_setlen(template_path, template_baselen);
51
52                 if (de->d_name[0] == '.')
53                         continue;
54                 strbuf_addstr(path, de->d_name);
55                 strbuf_addstr(template_path, de->d_name);
56                 if (lstat(path->buf, &st_git)) {
57                         if (errno != ENOENT)
58                                 die_errno(_("cannot stat '%s'"), path->buf);
59                 }
60                 else
61                         exists = 1;
62
63                 if (lstat(template_path->buf, &st_template))
64                         die_errno(_("cannot stat template '%s'"), template_path->buf);
65
66                 if (S_ISDIR(st_template.st_mode)) {
67                         DIR *subdir = opendir(template_path->buf);
68                         if (!subdir)
69                                 die_errno(_("cannot opendir '%s'"), template_path->buf);
70                         strbuf_addch(path, '/');
71                         strbuf_addch(template_path, '/');
72                         copy_templates_1(path, template_path, subdir);
73                         closedir(subdir);
74                 }
75                 else if (exists)
76                         continue;
77                 else if (S_ISLNK(st_template.st_mode)) {
78                         struct strbuf lnk = STRBUF_INIT;
79                         if (strbuf_readlink(&lnk, template_path->buf,
80                                             st_template.st_size) < 0)
81                                 die_errno(_("cannot readlink '%s'"), template_path->buf);
82                         if (symlink(lnk.buf, path->buf))
83                                 die_errno(_("cannot symlink '%s' '%s'"),
84                                           lnk.buf, path->buf);
85                         strbuf_release(&lnk);
86                 }
87                 else if (S_ISREG(st_template.st_mode)) {
88                         if (copy_file(path->buf, template_path->buf, st_template.st_mode))
89                                 die_errno(_("cannot copy '%s' to '%s'"),
90                                           template_path->buf, path->buf);
91                 }
92                 else
93                         error(_("ignoring template %s"), template_path->buf);
94         }
95 }
96
97 static void copy_templates(const char *template_dir)
98 {
99         struct strbuf path = STRBUF_INIT;
100         struct strbuf template_path = STRBUF_INIT;
101         size_t template_len;
102         struct repository_format template_format = REPOSITORY_FORMAT_INIT;
103         struct strbuf err = STRBUF_INIT;
104         DIR *dir;
105         char *to_free = NULL;
106
107         if (!template_dir)
108                 template_dir = getenv(TEMPLATE_DIR_ENVIRONMENT);
109         if (!template_dir)
110                 template_dir = init_db_template_dir;
111         if (!template_dir)
112                 template_dir = to_free = system_path(DEFAULT_GIT_TEMPLATE_DIR);
113         if (!template_dir[0]) {
114                 free(to_free);
115                 return;
116         }
117
118         strbuf_addstr(&template_path, template_dir);
119         strbuf_complete(&template_path, '/');
120         template_len = template_path.len;
121
122         dir = opendir(template_path.buf);
123         if (!dir) {
124                 warning(_("templates not found in %s"), template_dir);
125                 goto free_return;
126         }
127
128         /* Make sure that template is from the correct vintage */
129         strbuf_addstr(&template_path, "config");
130         read_repository_format(&template_format, template_path.buf);
131         strbuf_setlen(&template_path, template_len);
132
133         /*
134          * No mention of version at all is OK, but anything else should be
135          * verified.
136          */
137         if (template_format.version >= 0 &&
138             verify_repository_format(&template_format, &err) < 0) {
139                 warning(_("not copying templates from '%s': %s"),
140                           template_dir, err.buf);
141                 strbuf_release(&err);
142                 goto close_free_return;
143         }
144
145         strbuf_addstr(&path, get_git_common_dir());
146         strbuf_complete(&path, '/');
147         copy_templates_1(&path, &template_path, dir);
148 close_free_return:
149         closedir(dir);
150 free_return:
151         free(to_free);
152         strbuf_release(&path);
153         strbuf_release(&template_path);
154         clear_repository_format(&template_format);
155 }
156
157 static int git_init_db_config(const char *k, const char *v, void *cb)
158 {
159         if (!strcmp(k, "init.templatedir"))
160                 return git_config_pathname(&init_db_template_dir, k, v);
161
162         if (starts_with(k, "core."))
163                 return platform_core_config(k, v, cb);
164
165         return 0;
166 }
167
168 /*
169  * If the git_dir is not directly inside the working tree, then git will not
170  * find it by default, and we need to set the worktree explicitly.
171  */
172 static int needs_work_tree_config(const char *git_dir, const char *work_tree)
173 {
174         if (!strcmp(work_tree, "/") && !strcmp(git_dir, "/.git"))
175                 return 0;
176         if (skip_prefix(git_dir, work_tree, &git_dir) &&
177             !strcmp(git_dir, "/.git"))
178                 return 0;
179         return 1;
180 }
181
182 void initialize_repository_version(int hash_algo, int reinit)
183 {
184         char repo_version_string[10];
185         int repo_version = GIT_REPO_VERSION;
186
187         if (hash_algo != GIT_HASH_SHA1)
188                 repo_version = GIT_REPO_VERSION_READ;
189
190         /* This forces creation of new config file */
191         xsnprintf(repo_version_string, sizeof(repo_version_string),
192                   "%d", repo_version);
193         git_config_set("core.repositoryformatversion", repo_version_string);
194
195         if (hash_algo != GIT_HASH_SHA1)
196                 git_config_set("extensions.objectformat",
197                                hash_algos[hash_algo].name);
198         else if (reinit)
199                 git_config_set_gently("extensions.objectformat", NULL);
200 }
201
202 static int create_default_files(const char *template_path,
203                                 const char *original_git_dir,
204                                 const char *initial_branch,
205                                 const struct repository_format *fmt)
206 {
207         struct stat st1;
208         struct strbuf buf = STRBUF_INIT;
209         char *path;
210         char junk[2];
211         int reinit;
212         int filemode;
213         struct strbuf err = STRBUF_INIT;
214
215         /* Just look for `init.templatedir` */
216         init_db_template_dir = NULL; /* re-set in case it was set before */
217         git_config(git_init_db_config, NULL);
218
219         /*
220          * First copy the templates -- we might have the default
221          * config file there, in which case we would want to read
222          * from it after installing.
223          *
224          * Before reading that config, we also need to clear out any cached
225          * values (since we've just potentially changed what's available on
226          * disk).
227          */
228         copy_templates(template_path);
229         git_config_clear();
230         reset_shared_repository();
231         git_config(git_default_config, NULL);
232
233         /*
234          * We must make sure command-line options continue to override any
235          * values we might have just re-read from the config.
236          */
237         is_bare_repository_cfg = init_is_bare_repository;
238         if (init_shared_repository != -1)
239                 set_shared_repository(init_shared_repository);
240
241         /*
242          * We would have created the above under user's umask -- under
243          * shared-repository settings, we would need to fix them up.
244          */
245         if (get_shared_repository()) {
246                 adjust_shared_perm(get_git_dir());
247         }
248
249         /*
250          * We need to create a "refs" dir in any case so that older
251          * versions of git can tell that this is a repository.
252          */
253         safe_create_dir(git_path("refs"), 1);
254         adjust_shared_perm(git_path("refs"));
255
256         if (refs_init_db(&err))
257                 die("failed to set up refs db: %s", err.buf);
258
259         /*
260          * Point the HEAD symref to the initial branch with if HEAD does
261          * not yet exist.
262          */
263         path = git_path_buf(&buf, "HEAD");
264         reinit = (!access(path, R_OK)
265                   || readlink(path, junk, sizeof(junk)-1) != -1);
266         if (!reinit) {
267                 char *ref;
268
269                 if (!initial_branch)
270                         initial_branch = git_default_branch_name();
271
272                 ref = xstrfmt("refs/heads/%s", initial_branch);
273                 if (check_refname_format(ref, 0) < 0)
274                         die(_("invalid initial branch name: '%s'"),
275                             initial_branch);
276
277                 if (create_symref("HEAD", ref, NULL) < 0)
278                         exit(1);
279                 free(ref);
280         }
281
282         initialize_repository_version(fmt->hash_algo, 0);
283
284         /* Check filemode trustability */
285         path = git_path_buf(&buf, "config");
286         filemode = TEST_FILEMODE;
287         if (TEST_FILEMODE && !lstat(path, &st1)) {
288                 struct stat st2;
289                 filemode = (!chmod(path, st1.st_mode ^ S_IXUSR) &&
290                                 !lstat(path, &st2) &&
291                                 st1.st_mode != st2.st_mode &&
292                                 !chmod(path, st1.st_mode));
293                 if (filemode && !reinit && (st1.st_mode & S_IXUSR))
294                         filemode = 0;
295         }
296         git_config_set("core.filemode", filemode ? "true" : "false");
297
298         if (is_bare_repository())
299                 git_config_set("core.bare", "true");
300         else {
301                 const char *work_tree = get_git_work_tree();
302                 git_config_set("core.bare", "false");
303                 /* allow template config file to override the default */
304                 if (log_all_ref_updates == LOG_REFS_UNSET)
305                         git_config_set("core.logallrefupdates", "true");
306                 if (needs_work_tree_config(original_git_dir, work_tree))
307                         git_config_set("core.worktree", work_tree);
308         }
309
310         if (!reinit) {
311                 /* Check if symlink is supported in the work tree */
312                 path = git_path_buf(&buf, "tXXXXXX");
313                 if (!close(xmkstemp(path)) &&
314                     !unlink(path) &&
315                     !symlink("testing", path) &&
316                     !lstat(path, &st1) &&
317                     S_ISLNK(st1.st_mode))
318                         unlink(path); /* good */
319                 else
320                         git_config_set("core.symlinks", "false");
321
322                 /* Check if the filesystem is case-insensitive */
323                 path = git_path_buf(&buf, "CoNfIg");
324                 if (!access(path, F_OK))
325                         git_config_set("core.ignorecase", "true");
326                 probe_utf8_pathname_composition();
327         }
328
329         strbuf_release(&buf);
330         return reinit;
331 }
332
333 static void create_object_directory(void)
334 {
335         struct strbuf path = STRBUF_INIT;
336         size_t baselen;
337
338         strbuf_addstr(&path, get_object_directory());
339         baselen = path.len;
340
341         safe_create_dir(path.buf, 1);
342
343         strbuf_setlen(&path, baselen);
344         strbuf_addstr(&path, "/pack");
345         safe_create_dir(path.buf, 1);
346
347         strbuf_setlen(&path, baselen);
348         strbuf_addstr(&path, "/info");
349         safe_create_dir(path.buf, 1);
350
351         strbuf_release(&path);
352 }
353
354 static void separate_git_dir(const char *git_dir, const char *git_link)
355 {
356         struct stat st;
357
358         if (!stat(git_link, &st)) {
359                 const char *src;
360
361                 if (S_ISREG(st.st_mode))
362                         src = read_gitfile(git_link);
363                 else if (S_ISDIR(st.st_mode))
364                         src = git_link;
365                 else
366                         die(_("unable to handle file type %d"), (int)st.st_mode);
367
368                 if (rename(src, git_dir))
369                         die_errno(_("unable to move %s to %s"), src, git_dir);
370                 repair_worktrees(NULL, NULL);
371         }
372
373         write_file(git_link, "gitdir: %s", git_dir);
374 }
375
376 static void validate_hash_algorithm(struct repository_format *repo_fmt, int hash)
377 {
378         const char *env = getenv(GIT_DEFAULT_HASH_ENVIRONMENT);
379         /*
380          * If we already have an initialized repo, don't allow the user to
381          * specify a different algorithm, as that could cause corruption.
382          * Otherwise, if the user has specified one on the command line, use it.
383          */
384         if (repo_fmt->version >= 0 && hash != GIT_HASH_UNKNOWN && hash != repo_fmt->hash_algo)
385                 die(_("attempt to reinitialize repository with different hash"));
386         else if (hash != GIT_HASH_UNKNOWN)
387                 repo_fmt->hash_algo = hash;
388         else if (env) {
389                 int env_algo = hash_algo_by_name(env);
390                 if (env_algo == GIT_HASH_UNKNOWN)
391                         die(_("unknown hash algorithm '%s'"), env);
392                 repo_fmt->hash_algo = env_algo;
393         }
394 }
395
396 int init_db(const char *git_dir, const char *real_git_dir,
397             const char *template_dir, int hash, const char *initial_branch,
398             unsigned int flags)
399 {
400         int reinit;
401         int exist_ok = flags & INIT_DB_EXIST_OK;
402         char *original_git_dir = real_pathdup(git_dir, 1);
403         struct repository_format repo_fmt = REPOSITORY_FORMAT_INIT;
404
405         if (real_git_dir) {
406                 struct stat st;
407
408                 if (!exist_ok && !stat(git_dir, &st))
409                         die(_("%s already exists"), git_dir);
410
411                 if (!exist_ok && !stat(real_git_dir, &st))
412                         die(_("%s already exists"), real_git_dir);
413
414                 set_git_dir(real_git_dir, 1);
415                 git_dir = get_git_dir();
416                 separate_git_dir(git_dir, original_git_dir);
417         }
418         else {
419                 set_git_dir(git_dir, 1);
420                 git_dir = get_git_dir();
421         }
422         startup_info->have_repository = 1;
423
424         /* Just look for `core.hidedotfiles` */
425         git_config(git_init_db_config, NULL);
426
427         safe_create_dir(git_dir, 0);
428
429         init_is_bare_repository = is_bare_repository();
430
431         /* Check to see if the repository version is right.
432          * Note that a newly created repository does not have
433          * config file, so this will not fail.  What we are catching
434          * is an attempt to reinitialize new repository with an old tool.
435          */
436         check_repository_format(&repo_fmt);
437
438         validate_hash_algorithm(&repo_fmt, hash);
439
440         reinit = create_default_files(template_dir, original_git_dir,
441                                       initial_branch, &repo_fmt);
442         if (reinit && initial_branch)
443                 warning(_("re-init: ignored --initial-branch=%s"),
444                         initial_branch);
445
446         create_object_directory();
447
448         if (get_shared_repository()) {
449                 char buf[10];
450                 /* We do not spell "group" and such, so that
451                  * the configuration can be read by older version
452                  * of git. Note, we use octal numbers for new share modes,
453                  * and compatibility values for PERM_GROUP and
454                  * PERM_EVERYBODY.
455                  */
456                 if (get_shared_repository() < 0)
457                         /* force to the mode value */
458                         xsnprintf(buf, sizeof(buf), "0%o", -get_shared_repository());
459                 else if (get_shared_repository() == PERM_GROUP)
460                         xsnprintf(buf, sizeof(buf), "%d", OLD_PERM_GROUP);
461                 else if (get_shared_repository() == PERM_EVERYBODY)
462                         xsnprintf(buf, sizeof(buf), "%d", OLD_PERM_EVERYBODY);
463                 else
464                         BUG("invalid value for shared_repository");
465                 git_config_set("core.sharedrepository", buf);
466                 git_config_set("receive.denyNonFastforwards", "true");
467         }
468
469         if (!(flags & INIT_DB_QUIET)) {
470                 int len = strlen(git_dir);
471
472                 if (reinit)
473                         printf(get_shared_repository()
474                                ? _("Reinitialized existing shared Git repository in %s%s\n")
475                                : _("Reinitialized existing Git repository in %s%s\n"),
476                                git_dir, len && git_dir[len-1] != '/' ? "/" : "");
477                 else
478                         printf(get_shared_repository()
479                                ? _("Initialized empty shared Git repository in %s%s\n")
480                                : _("Initialized empty Git repository in %s%s\n"),
481                                git_dir, len && git_dir[len-1] != '/' ? "/" : "");
482         }
483
484         free(original_git_dir);
485         return 0;
486 }
487
488 static int guess_repository_type(const char *git_dir)
489 {
490         const char *slash;
491         char *cwd;
492         int cwd_is_git_dir;
493
494         /*
495          * "GIT_DIR=. git init" is always bare.
496          * "GIT_DIR=`pwd` git init" too.
497          */
498         if (!strcmp(".", git_dir))
499                 return 1;
500         cwd = xgetcwd();
501         cwd_is_git_dir = !strcmp(git_dir, cwd);
502         free(cwd);
503         if (cwd_is_git_dir)
504                 return 1;
505         /*
506          * "GIT_DIR=.git or GIT_DIR=something/.git is usually not.
507          */
508         if (!strcmp(git_dir, ".git"))
509                 return 0;
510         slash = strrchr(git_dir, '/');
511         if (slash && !strcmp(slash, "/.git"))
512                 return 0;
513
514         /*
515          * Otherwise it is often bare.  At this point
516          * we are just guessing.
517          */
518         return 1;
519 }
520
521 static int shared_callback(const struct option *opt, const char *arg, int unset)
522 {
523         BUG_ON_OPT_NEG(unset);
524         *((int *) opt->value) = (arg) ? git_config_perm("arg", arg) : PERM_GROUP;
525         return 0;
526 }
527
528 static const char *const init_db_usage[] = {
529         N_("git init [-q | --quiet] [--bare] [--template=<template-directory>] [--shared[=<permissions>]] [<directory>]"),
530         NULL
531 };
532
533 /*
534  * If you want to, you can share the DB area with any number of branches.
535  * That has advantages: you can save space by sharing all the SHA1 objects.
536  * On the other hand, it might just make lookup slower and messier. You
537  * be the judge.  The default case is to have one DB per managed directory.
538  */
539 int cmd_init_db(int argc, const char **argv, const char *prefix)
540 {
541         const char *git_dir;
542         const char *real_git_dir = NULL;
543         const char *work_tree;
544         const char *template_dir = NULL;
545         unsigned int flags = 0;
546         const char *object_format = NULL;
547         const char *initial_branch = NULL;
548         int hash_algo = GIT_HASH_UNKNOWN;
549         const struct option init_db_options[] = {
550                 OPT_STRING(0, "template", &template_dir, N_("template-directory"),
551                                 N_("directory from which templates will be used")),
552                 OPT_SET_INT(0, "bare", &is_bare_repository_cfg,
553                                 N_("create a bare repository"), 1),
554                 { OPTION_CALLBACK, 0, "shared", &init_shared_repository,
555                         N_("permissions"),
556                         N_("specify that the git repository is to be shared amongst several users"),
557                         PARSE_OPT_OPTARG | PARSE_OPT_NONEG, shared_callback, 0},
558                 OPT_BIT('q', "quiet", &flags, N_("be quiet"), INIT_DB_QUIET),
559                 OPT_STRING(0, "separate-git-dir", &real_git_dir, N_("gitdir"),
560                            N_("separate git dir from working tree")),
561                 OPT_STRING('b', "initial-branch", &initial_branch, N_("name"),
562                            N_("override the name of the initial branch")),
563                 OPT_STRING(0, "object-format", &object_format, N_("hash"),
564                            N_("specify the hash algorithm to use")),
565                 OPT_END()
566         };
567
568         argc = parse_options(argc, argv, prefix, init_db_options, init_db_usage, 0);
569
570         if (real_git_dir && is_bare_repository_cfg == 1)
571                 die(_("--separate-git-dir and --bare are mutually exclusive"));
572
573         if (real_git_dir && !is_absolute_path(real_git_dir))
574                 real_git_dir = real_pathdup(real_git_dir, 1);
575
576         if (template_dir && *template_dir && !is_absolute_path(template_dir))
577                 template_dir = absolute_pathdup(template_dir);
578
579         if (argc == 1) {
580                 int mkdir_tried = 0;
581         retry:
582                 if (chdir(argv[0]) < 0) {
583                         if (!mkdir_tried) {
584                                 int saved;
585                                 /*
586                                  * At this point we haven't read any configuration,
587                                  * and we know shared_repository should always be 0;
588                                  * but just in case we play safe.
589                                  */
590                                 saved = get_shared_repository();
591                                 set_shared_repository(0);
592                                 switch (safe_create_leading_directories_const(argv[0])) {
593                                 case SCLD_OK:
594                                 case SCLD_PERMS:
595                                         break;
596                                 case SCLD_EXISTS:
597                                         errno = EEXIST;
598                                         /* fallthru */
599                                 default:
600                                         die_errno(_("cannot mkdir %s"), argv[0]);
601                                         break;
602                                 }
603                                 set_shared_repository(saved);
604                                 if (mkdir(argv[0], 0777) < 0)
605                                         die_errno(_("cannot mkdir %s"), argv[0]);
606                                 mkdir_tried = 1;
607                                 goto retry;
608                         }
609                         die_errno(_("cannot chdir to %s"), argv[0]);
610                 }
611         } else if (0 < argc) {
612                 usage(init_db_usage[0]);
613         }
614         if (is_bare_repository_cfg == 1) {
615                 char *cwd = xgetcwd();
616                 setenv(GIT_DIR_ENVIRONMENT, cwd, argc > 0);
617                 free(cwd);
618         }
619
620         if (object_format) {
621                 hash_algo = hash_algo_by_name(object_format);
622                 if (hash_algo == GIT_HASH_UNKNOWN)
623                         die(_("unknown hash algorithm '%s'"), object_format);
624         }
625
626         if (init_shared_repository != -1)
627                 set_shared_repository(init_shared_repository);
628
629         /*
630          * GIT_WORK_TREE makes sense only in conjunction with GIT_DIR
631          * without --bare.  Catch the error early.
632          */
633         git_dir = xstrdup_or_null(getenv(GIT_DIR_ENVIRONMENT));
634         work_tree = xstrdup_or_null(getenv(GIT_WORK_TREE_ENVIRONMENT));
635         if ((!git_dir || is_bare_repository_cfg == 1) && work_tree)
636                 die(_("%s (or --work-tree=<directory>) not allowed without "
637                           "specifying %s (or --git-dir=<directory>)"),
638                     GIT_WORK_TREE_ENVIRONMENT,
639                     GIT_DIR_ENVIRONMENT);
640
641         /*
642          * Set up the default .git directory contents
643          */
644         if (!git_dir)
645                 git_dir = DEFAULT_GIT_DIR_ENVIRONMENT;
646
647         /*
648          * When --separate-git-dir is used inside a linked worktree, take
649          * care to ensure that the common .git/ directory is relocated, not
650          * the worktree-specific .git/worktrees/<id>/ directory.
651          */
652         if (real_git_dir) {
653                 int err;
654                 const char *p;
655                 struct strbuf sb = STRBUF_INIT;
656
657                 p = read_gitfile_gently(git_dir, &err);
658                 if (p && get_common_dir(&sb, p)) {
659                         struct strbuf mainwt = STRBUF_INIT;
660
661                         strbuf_addbuf(&mainwt, &sb);
662                         strbuf_strip_suffix(&mainwt, "/.git");
663                         if (chdir(mainwt.buf) < 0)
664                                 die_errno(_("cannot chdir to %s"), mainwt.buf);
665                         strbuf_release(&mainwt);
666                         git_dir = strbuf_detach(&sb, NULL);
667                 }
668                 strbuf_release(&sb);
669         }
670
671         if (is_bare_repository_cfg < 0)
672                 is_bare_repository_cfg = guess_repository_type(git_dir);
673
674         if (!is_bare_repository_cfg) {
675                 const char *git_dir_parent = strrchr(git_dir, '/');
676                 if (git_dir_parent) {
677                         char *rel = xstrndup(git_dir, git_dir_parent - git_dir);
678                         git_work_tree_cfg = real_pathdup(rel, 1);
679                         free(rel);
680                 }
681                 if (!git_work_tree_cfg)
682                         git_work_tree_cfg = xgetcwd();
683                 if (work_tree)
684                         set_git_work_tree(work_tree);
685                 else
686                         set_git_work_tree(git_work_tree_cfg);
687                 if (access(get_git_work_tree(), X_OK))
688                         die_errno (_("Cannot access work tree '%s'"),
689                                    get_git_work_tree());
690         }
691         else {
692                 if (real_git_dir)
693                         die(_("--separate-git-dir incompatible with bare repository"));
694                 if (work_tree)
695                         set_git_work_tree(work_tree);
696         }
697
698         UNLEAK(real_git_dir);
699         UNLEAK(git_dir);
700         UNLEAK(work_tree);
701
702         flags |= INIT_DB_EXIST_OK;
703         return init_db(git_dir, real_git_dir, template_dir, hash_algo,
704                        initial_branch, flags);
705 }