3 #include "string-list.h"
5 static int inside_git_dir
= -1;
6 static int inside_work_tree
= -1;
7 static int work_tree_config_is_bogus
;
9 static struct startup_info the_startup_info
;
10 struct startup_info
*startup_info
= &the_startup_info
;
13 * The input parameter must contain an absolute path, and it must already be
16 * Find the part of an absolute path that lies inside the work tree by
17 * dereferencing symlinks outside the work tree, for example:
18 * /dir1/repo/dir2/file (work tree is /dir1/repo) -> dir2/file
19 * /dir/file (work tree is /) -> dir/file
20 * /dir/symlink1/symlink2 (symlink1 points to work tree) -> symlink2
21 * /dir/repolink/file (repolink points to /dir/repo) -> file
22 * /dir/repo (exactly equal to work tree) -> (empty string)
24 static int abspath_part_inside_repo(char *path
)
30 const char *work_tree
= get_git_work_tree();
34 wtlen
= strlen(work_tree
);
36 off
= offset_1st_component(path
);
38 /* check if work tree is already the prefix */
39 if (wtlen
<= len
&& !strncmp(path
, work_tree
, wtlen
)) {
40 if (path
[wtlen
] == '/') {
41 memmove(path
, path
+ wtlen
+ 1, len
- wtlen
);
43 } else if (path
[wtlen
- 1] == '/' || path
[wtlen
] == '\0') {
44 /* work tree is the root, or the whole path */
45 memmove(path
, path
+ wtlen
, len
- wtlen
+ 1);
48 /* work tree might match beginning of a symlink to work tree */
54 /* check each '/'-terminated level */
59 if (strcmp(real_path(path0
), work_tree
) == 0) {
60 memmove(path0
, path
+ 1, len
- (path
- path0
));
67 /* check whole path */
68 if (strcmp(real_path(path0
), work_tree
) == 0) {
77 * Normalize "path", prepending the "prefix" for relative paths. If
78 * remaining_prefix is not NULL, return the actual prefix still
79 * remains in the path. For example, prefix = sub1/sub2/ and path is
81 * foo -> sub1/sub2/foo (full prefix)
82 * ../foo -> sub1/foo (remaining prefix is sub1/)
83 * ../../bar -> bar (no remaining prefix)
84 * ../../sub1/sub2/foo -> sub1/sub2/foo (but no remaining prefix)
85 * `pwd`/../bar -> sub1/bar (no remaining prefix)
87 char *prefix_path_gently(const char *prefix
, int len
,
88 int *remaining_prefix
, const char *path
)
90 const char *orig
= path
;
92 if (is_absolute_path(orig
)) {
93 sanitized
= xmallocz(strlen(path
));
95 *remaining_prefix
= 0;
96 if (normalize_path_copy_len(sanitized
, path
, remaining_prefix
)) {
100 if (abspath_part_inside_repo(sanitized
)) {
105 sanitized
= xstrfmt("%.*s%s", len
, len
? prefix
: "", path
);
106 if (remaining_prefix
)
107 *remaining_prefix
= len
;
108 if (normalize_path_copy_len(sanitized
, sanitized
, remaining_prefix
)) {
116 char *prefix_path(const char *prefix
, int len
, const char *path
)
118 char *r
= prefix_path_gently(prefix
, len
, NULL
, path
);
120 die("'%s' is outside repository", path
);
124 int path_inside_repo(const char *prefix
, const char *path
)
126 int len
= prefix
? strlen(prefix
) : 0;
127 char *r
= prefix_path_gently(prefix
, len
, NULL
, path
);
135 int check_filename(const char *prefix
, const char *arg
)
137 char *to_free
= NULL
;
140 if (skip_prefix(arg
, ":/", &arg
)) {
141 if (!*arg
) /* ":/" is root dir, always exists */
144 } else if (skip_prefix(arg
, ":!", &arg
) ||
145 skip_prefix(arg
, ":^", &arg
)) {
146 if (!*arg
) /* excluding everything is silly, but allowed */
151 arg
= to_free
= prefix_filename(prefix
, arg
);
153 if (!lstat(arg
, &st
)) {
155 return 1; /* file exists */
157 if (errno
== ENOENT
|| errno
== ENOTDIR
) {
159 return 0; /* file does not exist */
161 die_errno("failed to stat '%s'", arg
);
164 static void NORETURN
die_verify_filename(const char *prefix
,
166 int diagnose_misspelt_rev
)
168 if (!diagnose_misspelt_rev
)
169 die(_("%s: no such path in the working tree.\n"
170 "Use 'git <command> -- <path>...' to specify paths that do not exist locally."),
173 * Saying "'(icase)foo' does not exist in the index" when the
174 * user gave us ":(icase)foo" is just stupid. A magic pathspec
175 * begins with a colon and is followed by a non-alnum; do not
176 * let maybe_die_on_misspelt_object_name() even trigger.
178 if (!(arg
[0] == ':' && !isalnum(arg
[1])))
179 maybe_die_on_misspelt_object_name(arg
, prefix
);
181 /* ... or fall back the most general message. */
182 die(_("ambiguous argument '%s': unknown revision or path not in the working tree.\n"
183 "Use '--' to separate paths from revisions, like this:\n"
184 "'git <command> [<revision>...] -- [<file>...]'"), arg
);
189 * Verify a filename that we got as an argument for a pathspec
190 * entry. Note that a filename that begins with "-" never verifies
191 * as true, because even if such a filename were to exist, we want
192 * it to be preceded by the "--" marker (or we want the user to
193 * use a format like "./-filename")
195 * The "diagnose_misspelt_rev" is used to provide a user-friendly
196 * diagnosis when dying upon finding that "name" is not a pathname.
197 * If set to 1, the diagnosis will try to diagnose "name" as an
198 * invalid object name (e.g. HEAD:foo). If set to 0, the diagnosis
199 * will only complain about an inexisting file.
201 * This function is typically called to check that a "file or rev"
202 * argument is unambiguous. In this case, the caller will want
203 * diagnose_misspelt_rev == 1 when verifying the first non-rev
204 * argument (which could have been a revision), and
205 * diagnose_misspelt_rev == 0 for the next ones (because we already
206 * saw a filename, there's not ambiguity anymore).
208 void verify_filename(const char *prefix
,
210 int diagnose_misspelt_rev
)
213 die("bad flag '%s' used after filename", arg
);
214 if (check_filename(prefix
, arg
) || !no_wildcard(arg
))
216 die_verify_filename(prefix
, arg
, diagnose_misspelt_rev
);
220 * Opposite of the above: the command line did not have -- marker
221 * and we parsed the arg as a refname. It should not be interpretable
224 void verify_non_filename(const char *prefix
, const char *arg
)
226 if (!is_inside_work_tree() || is_inside_git_dir())
230 if (!check_filename(prefix
, arg
))
232 die(_("ambiguous argument '%s': both revision and filename\n"
233 "Use '--' to separate paths from revisions, like this:\n"
234 "'git <command> [<revision>...] -- [<file>...]'"), arg
);
237 int get_common_dir(struct strbuf
*sb
, const char *gitdir
)
239 const char *git_env_common_dir
= getenv(GIT_COMMON_DIR_ENVIRONMENT
);
240 if (git_env_common_dir
) {
241 strbuf_addstr(sb
, git_env_common_dir
);
244 return get_common_dir_noenv(sb
, gitdir
);
248 int get_common_dir_noenv(struct strbuf
*sb
, const char *gitdir
)
250 struct strbuf data
= STRBUF_INIT
;
251 struct strbuf path
= STRBUF_INIT
;
254 strbuf_addf(&path
, "%s/commondir", gitdir
);
255 if (file_exists(path
.buf
)) {
256 if (strbuf_read_file(&data
, path
.buf
, 0) <= 0)
257 die_errno(_("failed to read %s"), path
.buf
);
258 while (data
.len
&& (data
.buf
[data
.len
- 1] == '\n' ||
259 data
.buf
[data
.len
- 1] == '\r'))
261 data
.buf
[data
.len
] = '\0';
263 if (!is_absolute_path(data
.buf
))
264 strbuf_addf(&path
, "%s/", gitdir
);
265 strbuf_addbuf(&path
, &data
);
266 strbuf_add_real_path(sb
, path
.buf
);
269 strbuf_addstr(sb
, gitdir
);
272 strbuf_release(&data
);
273 strbuf_release(&path
);
278 * Test if it looks like we're at a git directory.
281 * - either an objects/ directory _or_ the proper
282 * GIT_OBJECT_DIRECTORY environment variable
283 * - a refs/ directory
284 * - either a HEAD symlink or a HEAD file that is formatted as
285 * a proper "ref:", or a regular file HEAD that has a properly
286 * formatted sha1 object name.
288 int is_git_directory(const char *suspect
)
290 struct strbuf path
= STRBUF_INIT
;
294 /* Check worktree-related signatures */
295 strbuf_addf(&path
, "%s/HEAD", suspect
);
296 if (validate_headref(path
.buf
))
300 get_common_dir(&path
, suspect
);
303 /* Check non-worktree-related signatures */
304 if (getenv(DB_ENVIRONMENT
)) {
305 if (access(getenv(DB_ENVIRONMENT
), X_OK
))
309 strbuf_setlen(&path
, len
);
310 strbuf_addstr(&path
, "/objects");
311 if (access(path
.buf
, X_OK
))
315 strbuf_setlen(&path
, len
);
316 strbuf_addstr(&path
, "/refs");
317 if (access(path
.buf
, X_OK
))
322 strbuf_release(&path
);
326 int is_nonbare_repository_dir(struct strbuf
*path
)
330 size_t orig_path_len
= path
->len
;
331 assert(orig_path_len
!= 0);
332 strbuf_complete(path
, '/');
333 strbuf_addstr(path
, ".git");
334 if (read_gitfile_gently(path
->buf
, &gitfile_error
) || is_git_directory(path
->buf
))
336 if (gitfile_error
== READ_GITFILE_ERR_OPEN_FAILED
||
337 gitfile_error
== READ_GITFILE_ERR_READ_FAILED
)
339 strbuf_setlen(path
, orig_path_len
);
343 int is_inside_git_dir(void)
345 if (inside_git_dir
< 0)
346 inside_git_dir
= is_inside_dir(get_git_dir());
347 return inside_git_dir
;
350 int is_inside_work_tree(void)
352 if (inside_work_tree
< 0)
353 inside_work_tree
= is_inside_dir(get_git_work_tree());
354 return inside_work_tree
;
357 void setup_work_tree(void)
359 const char *work_tree
, *git_dir
;
360 static int initialized
= 0;
365 if (work_tree_config_is_bogus
)
366 die("unable to set up work tree using invalid config");
368 work_tree
= get_git_work_tree();
369 git_dir
= get_git_dir();
370 if (!is_absolute_path(git_dir
))
371 git_dir
= real_path(get_git_dir());
372 if (!work_tree
|| chdir(work_tree
))
373 die("This operation must be run in a work tree");
376 * Make sure subsequent git processes find correct worktree
377 * if $GIT_WORK_TREE is set relative
379 if (getenv(GIT_WORK_TREE_ENVIRONMENT
))
380 setenv(GIT_WORK_TREE_ENVIRONMENT
, ".", 1);
382 set_git_dir(remove_leading_path(git_dir
, work_tree
));
386 static int check_repo_format(const char *var
, const char *value
, void *vdata
)
388 struct repository_format
*data
= vdata
;
391 if (strcmp(var
, "core.repositoryformatversion") == 0)
392 data
->version
= git_config_int(var
, value
);
393 else if (skip_prefix(var
, "extensions.", &ext
)) {
395 * record any known extensions here; otherwise,
396 * we fall through to recording it as unknown, and
397 * check_repository_format will complain
399 if (!strcmp(ext
, "noop"))
401 else if (!strcmp(ext
, "preciousobjects"))
402 data
->precious_objects
= git_config_bool(var
, value
);
404 string_list_append(&data
->unknown_extensions
, ext
);
405 } else if (strcmp(var
, "core.bare") == 0) {
406 data
->is_bare
= git_config_bool(var
, value
);
407 } else if (strcmp(var
, "core.worktree") == 0) {
409 return config_error_nonbool(var
);
410 data
->work_tree
= xstrdup(value
);
415 static int check_repository_format_gently(const char *gitdir
, int *nongit_ok
)
417 struct strbuf sb
= STRBUF_INIT
;
418 struct strbuf err
= STRBUF_INIT
;
419 struct repository_format candidate
;
422 has_common
= get_common_dir(&sb
, gitdir
);
423 strbuf_addstr(&sb
, "/config");
424 read_repository_format(&candidate
, sb
.buf
);
428 * For historical use of check_repository_format() in git-init,
429 * we treat a missing config as a silent "ok", even when nongit_ok
432 if (candidate
.version
< 0)
435 if (verify_repository_format(&candidate
, &err
) < 0) {
437 warning("%s", err
.buf
);
438 strbuf_release(&err
);
445 repository_format_precious_objects
= candidate
.precious_objects
;
446 string_list_clear(&candidate
.unknown_extensions
, 0);
448 if (candidate
.is_bare
!= -1) {
449 is_bare_repository_cfg
= candidate
.is_bare
;
450 if (is_bare_repository_cfg
== 1)
451 inside_work_tree
= -1;
453 if (candidate
.work_tree
) {
454 free(git_work_tree_cfg
);
455 git_work_tree_cfg
= candidate
.work_tree
;
456 inside_work_tree
= -1;
459 free(candidate
.work_tree
);
465 int read_repository_format(struct repository_format
*format
, const char *path
)
467 memset(format
, 0, sizeof(*format
));
468 format
->version
= -1;
469 format
->is_bare
= -1;
470 string_list_init(&format
->unknown_extensions
, 1);
471 git_config_from_file(check_repo_format
, path
, format
);
472 return format
->version
;
475 int verify_repository_format(const struct repository_format
*format
,
478 if (GIT_REPO_VERSION_READ
< format
->version
) {
479 strbuf_addf(err
, _("Expected git repo version <= %d, found %d"),
480 GIT_REPO_VERSION_READ
, format
->version
);
484 if (format
->version
>= 1 && format
->unknown_extensions
.nr
) {
487 strbuf_addstr(err
, _("unknown repository extensions found:"));
489 for (i
= 0; i
< format
->unknown_extensions
.nr
; i
++)
490 strbuf_addf(err
, "\n\t%s",
491 format
->unknown_extensions
.items
[i
].string
);
498 void read_gitfile_error_die(int error_code
, const char *path
, const char *dir
)
500 switch (error_code
) {
501 case READ_GITFILE_ERR_STAT_FAILED
:
502 case READ_GITFILE_ERR_NOT_A_FILE
:
503 /* non-fatal; follow return path */
505 case READ_GITFILE_ERR_OPEN_FAILED
:
506 die_errno("Error opening '%s'", path
);
507 case READ_GITFILE_ERR_TOO_LARGE
:
508 die("Too large to be a .git file: '%s'", path
);
509 case READ_GITFILE_ERR_READ_FAILED
:
510 die("Error reading %s", path
);
511 case READ_GITFILE_ERR_INVALID_FORMAT
:
512 die("Invalid gitfile format: %s", path
);
513 case READ_GITFILE_ERR_NO_PATH
:
514 die("No path in gitfile: %s", path
);
515 case READ_GITFILE_ERR_NOT_A_REPO
:
516 die("Not a git repository: %s", dir
);
518 die("BUG: unknown error code");
523 * Try to read the location of the git directory from the .git file,
524 * return path to git directory if found.
526 * On failure, if return_error_code is not NULL, return_error_code
527 * will be set to an error code and NULL will be returned. If
528 * return_error_code is NULL the function will die instead (for most
531 const char *read_gitfile_gently(const char *path
, int *return_error_code
)
533 const int max_file_size
= 1 << 20; /* 1MB */
542 if (stat(path
, &st
)) {
543 /* NEEDSWORK: discern between ENOENT vs other errors */
544 error_code
= READ_GITFILE_ERR_STAT_FAILED
;
547 if (!S_ISREG(st
.st_mode
)) {
548 error_code
= READ_GITFILE_ERR_NOT_A_FILE
;
551 if (st
.st_size
> max_file_size
) {
552 error_code
= READ_GITFILE_ERR_TOO_LARGE
;
555 fd
= open(path
, O_RDONLY
);
557 error_code
= READ_GITFILE_ERR_OPEN_FAILED
;
560 buf
= xmallocz(st
.st_size
);
561 len
= read_in_full(fd
, buf
, st
.st_size
);
563 if (len
!= st
.st_size
) {
564 error_code
= READ_GITFILE_ERR_READ_FAILED
;
567 if (!starts_with(buf
, "gitdir: ")) {
568 error_code
= READ_GITFILE_ERR_INVALID_FORMAT
;
571 while (buf
[len
- 1] == '\n' || buf
[len
- 1] == '\r')
574 error_code
= READ_GITFILE_ERR_NO_PATH
;
580 if (!is_absolute_path(dir
) && (slash
= strrchr(path
, '/'))) {
581 size_t pathlen
= slash
+1 - path
;
582 dir
= xstrfmt("%.*s%.*s", (int)pathlen
, path
,
583 (int)(len
- 8), buf
+ 8);
587 if (!is_git_directory(dir
)) {
588 error_code
= READ_GITFILE_ERR_NOT_A_REPO
;
591 path
= real_path(dir
);
594 if (return_error_code
)
595 *return_error_code
= error_code
;
597 read_gitfile_error_die(error_code
, path
, dir
);
600 return error_code
? NULL
: path
;
603 static const char *setup_explicit_git_dir(const char *gitdirenv
,
607 const char *work_tree_env
= getenv(GIT_WORK_TREE_ENVIRONMENT
);
608 const char *worktree
;
612 if (PATH_MAX
- 40 < strlen(gitdirenv
))
613 die("'$%s' too big", GIT_DIR_ENVIRONMENT
);
615 gitfile
= (char*)read_gitfile(gitdirenv
);
617 gitfile
= xstrdup(gitfile
);
621 if (!is_git_directory(gitdirenv
)) {
627 die("Not a git repository: '%s'", gitdirenv
);
630 if (check_repository_format_gently(gitdirenv
, nongit_ok
)) {
635 /* #3, #7, #11, #15, #19, #23, #27, #31 (see t1510) */
637 set_git_work_tree(work_tree_env
);
638 else if (is_bare_repository_cfg
> 0) {
639 if (git_work_tree_cfg
) {
641 warning("core.bare and core.worktree do not make sense");
642 work_tree_config_is_bogus
= 1;
646 set_git_dir(gitdirenv
);
650 else if (git_work_tree_cfg
) { /* #6, #14 */
651 if (is_absolute_path(git_work_tree_cfg
))
652 set_git_work_tree(git_work_tree_cfg
);
655 if (chdir(gitdirenv
))
656 die_errno("Could not chdir to '%s'", gitdirenv
);
657 if (chdir(git_work_tree_cfg
))
658 die_errno("Could not chdir to '%s'", git_work_tree_cfg
);
659 core_worktree
= xgetcwd();
661 die_errno("Could not come back to cwd");
662 set_git_work_tree(core_worktree
);
666 else if (!git_env_bool(GIT_IMPLICIT_WORK_TREE_ENVIRONMENT
, 1)) {
668 set_git_dir(gitdirenv
);
673 set_git_work_tree(".");
675 /* set_git_work_tree() must have been called by now */
676 worktree
= get_git_work_tree();
678 /* both get_git_work_tree() and cwd are already normalized */
679 if (!strcmp(cwd
->buf
, worktree
)) { /* cwd == worktree */
680 set_git_dir(gitdirenv
);
685 offset
= dir_inside_of(cwd
->buf
, worktree
);
686 if (offset
>= 0) { /* cwd inside worktree? */
687 set_git_dir(real_path(gitdirenv
));
689 die_errno("Could not chdir to '%s'", worktree
);
690 strbuf_addch(cwd
, '/');
692 return cwd
->buf
+ offset
;
695 /* cwd outside worktree */
696 set_git_dir(gitdirenv
);
701 static const char *setup_discovered_git_dir(const char *gitdir
,
702 struct strbuf
*cwd
, int offset
,
705 if (check_repository_format_gently(gitdir
, nongit_ok
))
708 /* --work-tree is set without --git-dir; use discovered one */
709 if (getenv(GIT_WORK_TREE_ENVIRONMENT
) || git_work_tree_cfg
) {
710 if (offset
!= cwd
->len
&& !is_absolute_path(gitdir
))
711 gitdir
= real_pathdup(gitdir
, 1);
713 die_errno("Could not come back to cwd");
714 return setup_explicit_git_dir(gitdir
, cwd
, nongit_ok
);
717 /* #16.2, #17.2, #20.2, #21.2, #24, #25, #28, #29 (see t1510) */
718 if (is_bare_repository_cfg
> 0) {
719 set_git_dir(offset
== cwd
->len
? gitdir
: real_path(gitdir
));
721 die_errno("Could not come back to cwd");
725 /* #0, #1, #5, #8, #9, #12, #13 */
726 set_git_work_tree(".");
727 if (strcmp(gitdir
, DEFAULT_GIT_DIR_ENVIRONMENT
))
730 inside_work_tree
= 1;
731 if (offset
== cwd
->len
)
734 /* Make "offset" point past the '/' (already the case for root dirs) */
735 if (offset
!= offset_1st_component(cwd
->buf
))
737 /* Add a '/' at the end */
738 strbuf_addch(cwd
, '/');
739 return cwd
->buf
+ offset
;
742 /* #16.1, #17.1, #20.1, #21.1, #22.1 (see t1510) */
743 static const char *setup_bare_git_dir(struct strbuf
*cwd
, int offset
,
748 if (check_repository_format_gently(".", nongit_ok
))
751 setenv(GIT_IMPLICIT_WORK_TREE_ENVIRONMENT
, "0", 1);
753 /* --work-tree is set without --git-dir; use discovered one */
754 if (getenv(GIT_WORK_TREE_ENVIRONMENT
) || git_work_tree_cfg
) {
757 gitdir
= offset
== cwd
->len
? "." : xmemdupz(cwd
->buf
, offset
);
759 die_errno("Could not come back to cwd");
760 return setup_explicit_git_dir(gitdir
, cwd
, nongit_ok
);
764 inside_work_tree
= 0;
765 if (offset
!= cwd
->len
) {
767 die_errno("Cannot come back to cwd");
768 root_len
= offset_1st_component(cwd
->buf
);
769 strbuf_setlen(cwd
, offset
> root_len
? offset
: root_len
);
770 set_git_dir(cwd
->buf
);
777 static const char *setup_nongit(const char *cwd
, int *nongit_ok
)
780 die(_("Not a git repository (or any of the parent directories): %s"), DEFAULT_GIT_DIR_ENVIRONMENT
);
782 die_errno(_("Cannot come back to cwd"));
787 static dev_t
get_device_or_die(const char *path
, const char *prefix
, int prefix_len
)
790 if (stat(path
, &buf
)) {
791 die_errno("failed to stat '%*s%s%s'",
793 prefix
? prefix
: "",
794 prefix
? "/" : "", path
);
800 * A "string_list_each_func_t" function that canonicalizes an entry
801 * from GIT_CEILING_DIRECTORIES using real_path_if_valid(), or
802 * discards it if unusable. The presence of an empty entry in
803 * GIT_CEILING_DIRECTORIES turns off canonicalization for all
804 * subsequent entries.
806 static int canonicalize_ceiling_entry(struct string_list_item
*item
,
809 int *empty_entry_found
= cb_data
;
810 char *ceil
= item
->string
;
813 *empty_entry_found
= 1;
815 } else if (!is_absolute_path(ceil
)) {
817 } else if (*empty_entry_found
) {
818 /* Keep entry but do not canonicalize it */
821 char *real_path
= real_pathdup(ceil
, 0);
826 item
->string
= real_path
;
831 enum discovery_result
{
836 /* these are errors */
837 GIT_DIR_HIT_CEILING
= -1,
838 GIT_DIR_HIT_MOUNT_POINT
= -2,
839 GIT_DIR_INVALID_GITFILE
= -3
843 * We cannot decide in this function whether we are in the work tree or
844 * not, since the config can only be read _after_ this function was called.
846 * Also, we avoid changing any global state (such as the current working
847 * directory) to allow early callers.
849 * The directory where the search should start needs to be passed in via the
850 * `dir` parameter; upon return, the `dir` buffer will contain the path of
851 * the directory where the search ended, and `gitdir` will contain the path of
852 * the discovered .git/ directory, if any. If `gitdir` is not absolute, it
853 * is relative to `dir` (i.e. *not* necessarily the cwd).
855 static enum discovery_result
setup_git_directory_gently_1(struct strbuf
*dir
,
856 struct strbuf
*gitdir
,
859 const char *env_ceiling_dirs
= getenv(CEILING_DIRECTORIES_ENVIRONMENT
);
860 struct string_list ceiling_dirs
= STRING_LIST_INIT_DUP
;
861 const char *gitdirenv
;
862 int ceil_offset
= -1, min_offset
= has_dos_drive_prefix(dir
->buf
) ? 3 : 1;
863 dev_t current_device
= 0;
864 int one_filesystem
= 1;
867 * If GIT_DIR is set explicitly, we're not going
868 * to do any discovery, but we still do repository
871 gitdirenv
= getenv(GIT_DIR_ENVIRONMENT
);
873 strbuf_addstr(gitdir
, gitdirenv
);
874 return GIT_DIR_EXPLICIT
;
877 if (env_ceiling_dirs
) {
878 int empty_entry_found
= 0;
880 string_list_split(&ceiling_dirs
, env_ceiling_dirs
, PATH_SEP
, -1);
881 filter_string_list(&ceiling_dirs
, 0,
882 canonicalize_ceiling_entry
, &empty_entry_found
);
883 ceil_offset
= longest_ancestor_length(dir
->buf
, &ceiling_dirs
);
884 string_list_clear(&ceiling_dirs
, 0);
888 ceil_offset
= min_offset
- 2;
891 * Test in the following order (relative to the dir):
892 * - .git (file containing "gitdir: <path>")
901 one_filesystem
= !git_env_bool("GIT_DISCOVERY_ACROSS_FILESYSTEM", 0);
903 current_device
= get_device_or_die(dir
->buf
, NULL
, 0);
905 int offset
= dir
->len
, error_code
= 0;
907 if (offset
> min_offset
)
908 strbuf_addch(dir
, '/');
909 strbuf_addstr(dir
, DEFAULT_GIT_DIR_ENVIRONMENT
);
910 gitdirenv
= read_gitfile_gently(dir
->buf
, die_on_error
?
914 error_code
== READ_GITFILE_ERR_NOT_A_FILE
) {
915 /* NEEDSWORK: fail if .git is not file nor dir */
916 if (is_git_directory(dir
->buf
))
917 gitdirenv
= DEFAULT_GIT_DIR_ENVIRONMENT
;
918 } else if (error_code
!= READ_GITFILE_ERR_STAT_FAILED
)
919 return GIT_DIR_INVALID_GITFILE
;
921 strbuf_setlen(dir
, offset
);
923 strbuf_addstr(gitdir
, gitdirenv
);
924 return GIT_DIR_DISCOVERED
;
927 if (is_git_directory(dir
->buf
)) {
928 strbuf_addstr(gitdir
, ".");
932 if (offset
<= min_offset
)
933 return GIT_DIR_HIT_CEILING
;
935 while (--offset
> ceil_offset
&& !is_dir_sep(dir
->buf
[offset
]))
937 if (offset
<= ceil_offset
)
938 return GIT_DIR_HIT_CEILING
;
940 strbuf_setlen(dir
, offset
> min_offset
? offset
: min_offset
);
941 if (one_filesystem
&&
942 current_device
!= get_device_or_die(dir
->buf
, NULL
, offset
))
943 return GIT_DIR_HIT_MOUNT_POINT
;
947 const char *discover_git_directory(struct strbuf
*gitdir
)
949 struct strbuf dir
= STRBUF_INIT
, err
= STRBUF_INIT
;
950 size_t gitdir_offset
= gitdir
->len
, cwd_len
;
951 struct repository_format candidate
;
953 if (strbuf_getcwd(&dir
))
957 if (setup_git_directory_gently_1(&dir
, gitdir
, 0) <= 0) {
958 strbuf_release(&dir
);
963 * The returned gitdir is relative to dir, and if dir does not reflect
964 * the current working directory, we simply make the gitdir absolute.
966 if (dir
.len
< cwd_len
&& !is_absolute_path(gitdir
->buf
+ gitdir_offset
)) {
967 /* Avoid a trailing "/." */
968 if (!strcmp(".", gitdir
->buf
+ gitdir_offset
))
969 strbuf_setlen(gitdir
, gitdir_offset
);
971 strbuf_addch(&dir
, '/');
972 strbuf_insert(gitdir
, gitdir_offset
, dir
.buf
, dir
.len
);
976 strbuf_addf(&dir
, "%s/config", gitdir
->buf
+ gitdir_offset
);
977 read_repository_format(&candidate
, dir
.buf
);
978 strbuf_release(&dir
);
980 if (verify_repository_format(&candidate
, &err
) < 0) {
981 warning("ignoring git dir '%s': %s",
982 gitdir
->buf
+ gitdir_offset
, err
.buf
);
983 strbuf_release(&err
);
987 return gitdir
->buf
+ gitdir_offset
;
990 const char *setup_git_directory_gently(int *nongit_ok
)
992 static struct strbuf cwd
= STRBUF_INIT
;
993 struct strbuf dir
= STRBUF_INIT
, gitdir
= STRBUF_INIT
;
994 const char *prefix
, *env_prefix
;
997 * We may have read an incomplete configuration before
998 * setting-up the git directory. If so, clear the cache so
999 * that the next queries to the configuration reload complete
1000 * configuration (including the per-repo config file that we
1001 * ignored previously).
1006 * Let's assume that we are in a git repository.
1007 * If it turns out later that we are somewhere else, the value will be
1008 * updated accordingly.
1013 if (strbuf_getcwd(&cwd
))
1014 die_errno(_("Unable to read current working directory"));
1015 strbuf_addbuf(&dir
, &cwd
);
1017 switch (setup_git_directory_gently_1(&dir
, &gitdir
, 1)) {
1021 case GIT_DIR_EXPLICIT
:
1022 prefix
= setup_explicit_git_dir(gitdir
.buf
, &cwd
, nongit_ok
);
1024 case GIT_DIR_DISCOVERED
:
1025 if (dir
.len
< cwd
.len
&& chdir(dir
.buf
))
1026 die(_("Cannot change to '%s'"), dir
.buf
);
1027 prefix
= setup_discovered_git_dir(gitdir
.buf
, &cwd
, dir
.len
,
1031 if (dir
.len
< cwd
.len
&& chdir(dir
.buf
))
1032 die(_("Cannot change to '%s'"), dir
.buf
);
1033 prefix
= setup_bare_git_dir(&cwd
, dir
.len
, nongit_ok
);
1035 case GIT_DIR_HIT_CEILING
:
1036 prefix
= setup_nongit(cwd
.buf
, nongit_ok
);
1038 case GIT_DIR_HIT_MOUNT_POINT
:
1041 strbuf_release(&cwd
);
1042 strbuf_release(&dir
);
1045 die(_("Not a git repository (or any parent up to mount point %s)\n"
1046 "Stopping at filesystem boundary (GIT_DISCOVERY_ACROSS_FILESYSTEM not set)."),
1049 die("BUG: unhandled setup_git_directory_1() result");
1052 env_prefix
= getenv(GIT_TOPLEVEL_PREFIX_ENVIRONMENT
);
1054 prefix
= env_prefix
;
1057 setenv(GIT_PREFIX_ENVIRONMENT
, prefix
, 1);
1059 setenv(GIT_PREFIX_ENVIRONMENT
, "", 1);
1061 startup_info
->have_repository
= !nongit_ok
|| !*nongit_ok
;
1062 startup_info
->prefix
= prefix
;
1064 strbuf_release(&dir
);
1065 strbuf_release(&gitdir
);
1070 int git_config_perm(const char *var
, const char *value
)
1078 if (!strcmp(value
, "umask"))
1080 if (!strcmp(value
, "group"))
1082 if (!strcmp(value
, "all") ||
1083 !strcmp(value
, "world") ||
1084 !strcmp(value
, "everybody"))
1085 return PERM_EVERYBODY
;
1087 /* Parse octal numbers */
1088 i
= strtol(value
, &endptr
, 8);
1090 /* If not an octal number, maybe true/false? */
1092 return git_config_bool(var
, value
) ? PERM_GROUP
: PERM_UMASK
;
1095 * Treat values 0, 1 and 2 as compatibility cases, otherwise it is
1096 * a chmod value to restrict to.
1099 case PERM_UMASK
: /* 0 */
1101 case OLD_PERM_GROUP
: /* 1 */
1103 case OLD_PERM_EVERYBODY
: /* 2 */
1104 return PERM_EVERYBODY
;
1107 /* A filemode value was given: 0xxx */
1109 if ((i
& 0600) != 0600)
1110 die(_("Problem with core.sharedRepository filemode value "
1111 "(0%.3o).\nThe owner of files must always have "
1112 "read and write permissions."), i
);
1115 * Mask filemode value. Others can not get write permission.
1116 * x flags for directories are handled separately.
1121 void check_repository_format(void)
1123 check_repository_format_gently(get_git_dir(), NULL
);
1124 startup_info
->have_repository
= 1;
1128 * Returns the "prefix", a path to the current working directory
1129 * relative to the work tree root, or NULL, if the current working
1130 * directory is not a strict subdirectory of the work tree root. The
1131 * prefix always ends with a '/' character.
1133 const char *setup_git_directory(void)
1135 return setup_git_directory_gently(NULL
);
1138 const char *resolve_gitdir_gently(const char *suspect
, int *return_error_code
)
1140 if (is_git_directory(suspect
))
1142 return read_gitfile_gently(suspect
, return_error_code
);
1145 /* if any standard file descriptor is missing open it to /dev/null */
1146 void sanitize_stdfds(void)
1148 int fd
= open("/dev/null", O_RDWR
, 0);
1149 while (fd
!= -1 && fd
< 2)
1152 die_errno("open /dev/null or dup failed");
1159 #ifdef NO_POSIX_GOODIES
1167 die_errno("fork failed");
1172 die_errno("setsid failed");