2 #include "repository.h"
5 #include "string-list.h"
7 static int inside_git_dir
= -1;
8 static int inside_work_tree
= -1;
9 static int work_tree_config_is_bogus
;
11 static struct startup_info the_startup_info
;
12 struct startup_info
*startup_info
= &the_startup_info
;
15 * The input parameter must contain an absolute path, and it must already be
18 * Find the part of an absolute path that lies inside the work tree by
19 * dereferencing symlinks outside the work tree, for example:
20 * /dir1/repo/dir2/file (work tree is /dir1/repo) -> dir2/file
21 * /dir/file (work tree is /) -> dir/file
22 * /dir/symlink1/symlink2 (symlink1 points to work tree) -> symlink2
23 * /dir/repolink/file (repolink points to /dir/repo) -> file
24 * /dir/repo (exactly equal to work tree) -> (empty string)
26 static int abspath_part_inside_repo(char *path
)
32 const char *work_tree
= get_git_work_tree();
36 wtlen
= strlen(work_tree
);
38 off
= offset_1st_component(path
);
40 /* check if work tree is already the prefix */
41 if (wtlen
<= len
&& !strncmp(path
, work_tree
, wtlen
)) {
42 if (path
[wtlen
] == '/') {
43 memmove(path
, path
+ wtlen
+ 1, len
- wtlen
);
45 } else if (path
[wtlen
- 1] == '/' || path
[wtlen
] == '\0') {
46 /* work tree is the root, or the whole path */
47 memmove(path
, path
+ wtlen
, len
- wtlen
+ 1);
50 /* work tree might match beginning of a symlink to work tree */
56 /* check each '/'-terminated level */
61 if (strcmp(real_path(path0
), work_tree
) == 0) {
62 memmove(path0
, path
+ 1, len
- (path
- path0
));
69 /* check whole path */
70 if (strcmp(real_path(path0
), work_tree
) == 0) {
79 * Normalize "path", prepending the "prefix" for relative paths. If
80 * remaining_prefix is not NULL, return the actual prefix still
81 * remains in the path. For example, prefix = sub1/sub2/ and path is
83 * foo -> sub1/sub2/foo (full prefix)
84 * ../foo -> sub1/foo (remaining prefix is sub1/)
85 * ../../bar -> bar (no remaining prefix)
86 * ../../sub1/sub2/foo -> sub1/sub2/foo (but no remaining prefix)
87 * `pwd`/../bar -> sub1/bar (no remaining prefix)
89 char *prefix_path_gently(const char *prefix
, int len
,
90 int *remaining_prefix
, const char *path
)
92 const char *orig
= path
;
94 if (is_absolute_path(orig
)) {
95 sanitized
= xmallocz(strlen(path
));
97 *remaining_prefix
= 0;
98 if (normalize_path_copy_len(sanitized
, path
, remaining_prefix
)) {
102 if (abspath_part_inside_repo(sanitized
)) {
107 sanitized
= xstrfmt("%.*s%s", len
, len
? prefix
: "", path
);
108 if (remaining_prefix
)
109 *remaining_prefix
= len
;
110 if (normalize_path_copy_len(sanitized
, sanitized
, remaining_prefix
)) {
118 char *prefix_path(const char *prefix
, int len
, const char *path
)
120 char *r
= prefix_path_gently(prefix
, len
, NULL
, path
);
122 die("'%s' is outside repository", path
);
126 int path_inside_repo(const char *prefix
, const char *path
)
128 int len
= prefix
? strlen(prefix
) : 0;
129 char *r
= prefix_path_gently(prefix
, len
, NULL
, path
);
137 int check_filename(const char *prefix
, const char *arg
)
139 char *to_free
= NULL
;
142 if (skip_prefix(arg
, ":/", &arg
)) {
143 if (!*arg
) /* ":/" is root dir, always exists */
146 } else if (skip_prefix(arg
, ":!", &arg
) ||
147 skip_prefix(arg
, ":^", &arg
)) {
148 if (!*arg
) /* excluding everything is silly, but allowed */
153 arg
= to_free
= prefix_filename(prefix
, arg
);
155 if (!lstat(arg
, &st
)) {
157 return 1; /* file exists */
159 if (is_missing_file_error(errno
)) {
161 return 0; /* file does not exist */
163 die_errno("failed to stat '%s'", arg
);
166 static void NORETURN
die_verify_filename(const char *prefix
,
168 int diagnose_misspelt_rev
)
170 if (!diagnose_misspelt_rev
)
171 die(_("%s: no such path in the working tree.\n"
172 "Use 'git <command> -- <path>...' to specify paths that do not exist locally."),
175 * Saying "'(icase)foo' does not exist in the index" when the
176 * user gave us ":(icase)foo" is just stupid. A magic pathspec
177 * begins with a colon and is followed by a non-alnum; do not
178 * let maybe_die_on_misspelt_object_name() even trigger.
180 if (!(arg
[0] == ':' && !isalnum(arg
[1])))
181 maybe_die_on_misspelt_object_name(arg
, prefix
);
183 /* ... or fall back the most general message. */
184 die(_("ambiguous argument '%s': unknown revision or path not in the working tree.\n"
185 "Use '--' to separate paths from revisions, like this:\n"
186 "'git <command> [<revision>...] -- [<file>...]'"), arg
);
191 * Check for arguments that don't resolve as actual files,
192 * but which look sufficiently like pathspecs that we'll consider
193 * them such for the purposes of rev/pathspec DWIM parsing.
195 static int looks_like_pathspec(const char *arg
)
197 /* anything with a wildcard character */
198 if (!no_wildcard(arg
))
201 /* long-form pathspec magic */
202 if (starts_with(arg
, ":("))
209 * Verify a filename that we got as an argument for a pathspec
210 * entry. Note that a filename that begins with "-" never verifies
211 * as true, because even if such a filename were to exist, we want
212 * it to be preceded by the "--" marker (or we want the user to
213 * use a format like "./-filename")
215 * The "diagnose_misspelt_rev" is used to provide a user-friendly
216 * diagnosis when dying upon finding that "name" is not a pathname.
217 * If set to 1, the diagnosis will try to diagnose "name" as an
218 * invalid object name (e.g. HEAD:foo). If set to 0, the diagnosis
219 * will only complain about an inexisting file.
221 * This function is typically called to check that a "file or rev"
222 * argument is unambiguous. In this case, the caller will want
223 * diagnose_misspelt_rev == 1 when verifying the first non-rev
224 * argument (which could have been a revision), and
225 * diagnose_misspelt_rev == 0 for the next ones (because we already
226 * saw a filename, there's not ambiguity anymore).
228 void verify_filename(const char *prefix
,
230 int diagnose_misspelt_rev
)
233 die("bad flag '%s' used after filename", arg
);
234 if (looks_like_pathspec(arg
) || check_filename(prefix
, arg
))
236 die_verify_filename(prefix
, arg
, diagnose_misspelt_rev
);
240 * Opposite of the above: the command line did not have -- marker
241 * and we parsed the arg as a refname. It should not be interpretable
244 void verify_non_filename(const char *prefix
, const char *arg
)
246 if (!is_inside_work_tree() || is_inside_git_dir())
250 if (!check_filename(prefix
, arg
))
252 die(_("ambiguous argument '%s': both revision and filename\n"
253 "Use '--' to separate paths from revisions, like this:\n"
254 "'git <command> [<revision>...] -- [<file>...]'"), arg
);
257 int get_common_dir(struct strbuf
*sb
, const char *gitdir
)
259 const char *git_env_common_dir
= getenv(GIT_COMMON_DIR_ENVIRONMENT
);
260 if (git_env_common_dir
) {
261 strbuf_addstr(sb
, git_env_common_dir
);
264 return get_common_dir_noenv(sb
, gitdir
);
268 int get_common_dir_noenv(struct strbuf
*sb
, const char *gitdir
)
270 struct strbuf data
= STRBUF_INIT
;
271 struct strbuf path
= STRBUF_INIT
;
274 strbuf_addf(&path
, "%s/commondir", gitdir
);
275 if (file_exists(path
.buf
)) {
276 if (strbuf_read_file(&data
, path
.buf
, 0) <= 0)
277 die_errno(_("failed to read %s"), path
.buf
);
278 while (data
.len
&& (data
.buf
[data
.len
- 1] == '\n' ||
279 data
.buf
[data
.len
- 1] == '\r'))
281 data
.buf
[data
.len
] = '\0';
283 if (!is_absolute_path(data
.buf
))
284 strbuf_addf(&path
, "%s/", gitdir
);
285 strbuf_addbuf(&path
, &data
);
286 strbuf_add_real_path(sb
, path
.buf
);
289 strbuf_addstr(sb
, gitdir
);
292 strbuf_release(&data
);
293 strbuf_release(&path
);
298 * Test if it looks like we're at a git directory.
301 * - either an objects/ directory _or_ the proper
302 * GIT_OBJECT_DIRECTORY environment variable
303 * - a refs/ directory
304 * - either a HEAD symlink or a HEAD file that is formatted as
305 * a proper "ref:", or a regular file HEAD that has a properly
306 * formatted sha1 object name.
308 int is_git_directory(const char *suspect
)
310 struct strbuf path
= STRBUF_INIT
;
314 /* Check worktree-related signatures */
315 strbuf_addf(&path
, "%s/HEAD", suspect
);
316 if (validate_headref(path
.buf
))
320 get_common_dir(&path
, suspect
);
323 /* Check non-worktree-related signatures */
324 if (getenv(DB_ENVIRONMENT
)) {
325 if (access(getenv(DB_ENVIRONMENT
), X_OK
))
329 strbuf_setlen(&path
, len
);
330 strbuf_addstr(&path
, "/objects");
331 if (access(path
.buf
, X_OK
))
335 strbuf_setlen(&path
, len
);
336 strbuf_addstr(&path
, "/refs");
337 if (access(path
.buf
, X_OK
))
342 strbuf_release(&path
);
346 int is_nonbare_repository_dir(struct strbuf
*path
)
350 size_t orig_path_len
= path
->len
;
351 assert(orig_path_len
!= 0);
352 strbuf_complete(path
, '/');
353 strbuf_addstr(path
, ".git");
354 if (read_gitfile_gently(path
->buf
, &gitfile_error
) || is_git_directory(path
->buf
))
356 if (gitfile_error
== READ_GITFILE_ERR_OPEN_FAILED
||
357 gitfile_error
== READ_GITFILE_ERR_READ_FAILED
)
359 strbuf_setlen(path
, orig_path_len
);
363 int is_inside_git_dir(void)
365 if (inside_git_dir
< 0)
366 inside_git_dir
= is_inside_dir(get_git_dir());
367 return inside_git_dir
;
370 int is_inside_work_tree(void)
372 if (inside_work_tree
< 0)
373 inside_work_tree
= is_inside_dir(get_git_work_tree());
374 return inside_work_tree
;
377 void setup_work_tree(void)
379 const char *work_tree
, *git_dir
;
380 static int initialized
= 0;
385 if (work_tree_config_is_bogus
)
386 die("unable to set up work tree using invalid config");
388 work_tree
= get_git_work_tree();
389 git_dir
= get_git_dir();
390 if (!is_absolute_path(git_dir
))
391 git_dir
= real_path(get_git_dir());
392 if (!work_tree
|| chdir(work_tree
))
393 die("This operation must be run in a work tree");
396 * Make sure subsequent git processes find correct worktree
397 * if $GIT_WORK_TREE is set relative
399 if (getenv(GIT_WORK_TREE_ENVIRONMENT
))
400 setenv(GIT_WORK_TREE_ENVIRONMENT
, ".", 1);
403 * NEEDSWORK: this call can essentially be set_git_dir(get_git_dir())
404 * which can cause some problems when trying to free the old value of
407 set_git_dir(remove_leading_path(git_dir
, work_tree
));
411 static int check_repo_format(const char *var
, const char *value
, void *vdata
)
413 struct repository_format
*data
= vdata
;
416 if (strcmp(var
, "core.repositoryformatversion") == 0)
417 data
->version
= git_config_int(var
, value
);
418 else if (skip_prefix(var
, "extensions.", &ext
)) {
420 * record any known extensions here; otherwise,
421 * we fall through to recording it as unknown, and
422 * check_repository_format will complain
424 if (!strcmp(ext
, "noop"))
426 else if (!strcmp(ext
, "preciousobjects"))
427 data
->precious_objects
= git_config_bool(var
, value
);
429 string_list_append(&data
->unknown_extensions
, ext
);
430 } else if (strcmp(var
, "core.bare") == 0) {
431 data
->is_bare
= git_config_bool(var
, value
);
432 } else if (strcmp(var
, "core.worktree") == 0) {
434 return config_error_nonbool(var
);
435 data
->work_tree
= xstrdup(value
);
440 static int check_repository_format_gently(const char *gitdir
, int *nongit_ok
)
442 struct strbuf sb
= STRBUF_INIT
;
443 struct strbuf err
= STRBUF_INIT
;
444 struct repository_format candidate
;
447 has_common
= get_common_dir(&sb
, gitdir
);
448 strbuf_addstr(&sb
, "/config");
449 read_repository_format(&candidate
, sb
.buf
);
453 * For historical use of check_repository_format() in git-init,
454 * we treat a missing config as a silent "ok", even when nongit_ok
457 if (candidate
.version
< 0)
460 if (verify_repository_format(&candidate
, &err
) < 0) {
462 warning("%s", err
.buf
);
463 strbuf_release(&err
);
470 repository_format_precious_objects
= candidate
.precious_objects
;
471 string_list_clear(&candidate
.unknown_extensions
, 0);
473 if (candidate
.is_bare
!= -1) {
474 is_bare_repository_cfg
= candidate
.is_bare
;
475 if (is_bare_repository_cfg
== 1)
476 inside_work_tree
= -1;
478 if (candidate
.work_tree
) {
479 free(git_work_tree_cfg
);
480 git_work_tree_cfg
= candidate
.work_tree
;
481 inside_work_tree
= -1;
484 free(candidate
.work_tree
);
490 int read_repository_format(struct repository_format
*format
, const char *path
)
492 memset(format
, 0, sizeof(*format
));
493 format
->version
= -1;
494 format
->is_bare
= -1;
495 string_list_init(&format
->unknown_extensions
, 1);
496 git_config_from_file(check_repo_format
, path
, format
);
497 return format
->version
;
500 int verify_repository_format(const struct repository_format
*format
,
503 if (GIT_REPO_VERSION_READ
< format
->version
) {
504 strbuf_addf(err
, _("Expected git repo version <= %d, found %d"),
505 GIT_REPO_VERSION_READ
, format
->version
);
509 if (format
->version
>= 1 && format
->unknown_extensions
.nr
) {
512 strbuf_addstr(err
, _("unknown repository extensions found:"));
514 for (i
= 0; i
< format
->unknown_extensions
.nr
; i
++)
515 strbuf_addf(err
, "\n\t%s",
516 format
->unknown_extensions
.items
[i
].string
);
523 void read_gitfile_error_die(int error_code
, const char *path
, const char *dir
)
525 switch (error_code
) {
526 case READ_GITFILE_ERR_STAT_FAILED
:
527 case READ_GITFILE_ERR_NOT_A_FILE
:
528 /* non-fatal; follow return path */
530 case READ_GITFILE_ERR_OPEN_FAILED
:
531 die_errno("Error opening '%s'", path
);
532 case READ_GITFILE_ERR_TOO_LARGE
:
533 die("Too large to be a .git file: '%s'", path
);
534 case READ_GITFILE_ERR_READ_FAILED
:
535 die("Error reading %s", path
);
536 case READ_GITFILE_ERR_INVALID_FORMAT
:
537 die("Invalid gitfile format: %s", path
);
538 case READ_GITFILE_ERR_NO_PATH
:
539 die("No path in gitfile: %s", path
);
540 case READ_GITFILE_ERR_NOT_A_REPO
:
541 die("Not a git repository: %s", dir
);
543 die("BUG: unknown error code");
548 * Try to read the location of the git directory from the .git file,
549 * return path to git directory if found.
551 * On failure, if return_error_code is not NULL, return_error_code
552 * will be set to an error code and NULL will be returned. If
553 * return_error_code is NULL the function will die instead (for most
556 const char *read_gitfile_gently(const char *path
, int *return_error_code
)
558 const int max_file_size
= 1 << 20; /* 1MB */
567 if (stat(path
, &st
)) {
568 /* NEEDSWORK: discern between ENOENT vs other errors */
569 error_code
= READ_GITFILE_ERR_STAT_FAILED
;
572 if (!S_ISREG(st
.st_mode
)) {
573 error_code
= READ_GITFILE_ERR_NOT_A_FILE
;
576 if (st
.st_size
> max_file_size
) {
577 error_code
= READ_GITFILE_ERR_TOO_LARGE
;
580 fd
= open(path
, O_RDONLY
);
582 error_code
= READ_GITFILE_ERR_OPEN_FAILED
;
585 buf
= xmallocz(st
.st_size
);
586 len
= read_in_full(fd
, buf
, st
.st_size
);
588 if (len
!= st
.st_size
) {
589 error_code
= READ_GITFILE_ERR_READ_FAILED
;
592 if (!starts_with(buf
, "gitdir: ")) {
593 error_code
= READ_GITFILE_ERR_INVALID_FORMAT
;
596 while (buf
[len
- 1] == '\n' || buf
[len
- 1] == '\r')
599 error_code
= READ_GITFILE_ERR_NO_PATH
;
605 if (!is_absolute_path(dir
) && (slash
= strrchr(path
, '/'))) {
606 size_t pathlen
= slash
+1 - path
;
607 dir
= xstrfmt("%.*s%.*s", (int)pathlen
, path
,
608 (int)(len
- 8), buf
+ 8);
612 if (!is_git_directory(dir
)) {
613 error_code
= READ_GITFILE_ERR_NOT_A_REPO
;
616 path
= real_path(dir
);
619 if (return_error_code
)
620 *return_error_code
= error_code
;
622 read_gitfile_error_die(error_code
, path
, dir
);
625 return error_code
? NULL
: path
;
628 static const char *setup_explicit_git_dir(const char *gitdirenv
,
632 const char *work_tree_env
= getenv(GIT_WORK_TREE_ENVIRONMENT
);
633 const char *worktree
;
637 if (PATH_MAX
- 40 < strlen(gitdirenv
))
638 die("'$%s' too big", GIT_DIR_ENVIRONMENT
);
640 gitfile
= (char*)read_gitfile(gitdirenv
);
642 gitfile
= xstrdup(gitfile
);
646 if (!is_git_directory(gitdirenv
)) {
652 die("Not a git repository: '%s'", gitdirenv
);
655 if (check_repository_format_gently(gitdirenv
, nongit_ok
)) {
660 /* #3, #7, #11, #15, #19, #23, #27, #31 (see t1510) */
662 set_git_work_tree(work_tree_env
);
663 else if (is_bare_repository_cfg
> 0) {
664 if (git_work_tree_cfg
) {
666 warning("core.bare and core.worktree do not make sense");
667 work_tree_config_is_bogus
= 1;
671 set_git_dir(gitdirenv
);
675 else if (git_work_tree_cfg
) { /* #6, #14 */
676 if (is_absolute_path(git_work_tree_cfg
))
677 set_git_work_tree(git_work_tree_cfg
);
680 if (chdir(gitdirenv
))
681 die_errno("Could not chdir to '%s'", gitdirenv
);
682 if (chdir(git_work_tree_cfg
))
683 die_errno("Could not chdir to '%s'", git_work_tree_cfg
);
684 core_worktree
= xgetcwd();
686 die_errno("Could not come back to cwd");
687 set_git_work_tree(core_worktree
);
691 else if (!git_env_bool(GIT_IMPLICIT_WORK_TREE_ENVIRONMENT
, 1)) {
693 set_git_dir(gitdirenv
);
698 set_git_work_tree(".");
700 /* set_git_work_tree() must have been called by now */
701 worktree
= get_git_work_tree();
703 /* both get_git_work_tree() and cwd are already normalized */
704 if (!strcmp(cwd
->buf
, worktree
)) { /* cwd == worktree */
705 set_git_dir(gitdirenv
);
710 offset
= dir_inside_of(cwd
->buf
, worktree
);
711 if (offset
>= 0) { /* cwd inside worktree? */
712 set_git_dir(real_path(gitdirenv
));
714 die_errno("Could not chdir to '%s'", worktree
);
715 strbuf_addch(cwd
, '/');
717 return cwd
->buf
+ offset
;
720 /* cwd outside worktree */
721 set_git_dir(gitdirenv
);
726 static const char *setup_discovered_git_dir(const char *gitdir
,
727 struct strbuf
*cwd
, int offset
,
730 if (check_repository_format_gently(gitdir
, nongit_ok
))
733 /* --work-tree is set without --git-dir; use discovered one */
734 if (getenv(GIT_WORK_TREE_ENVIRONMENT
) || git_work_tree_cfg
) {
735 char *to_free
= NULL
;
738 if (offset
!= cwd
->len
&& !is_absolute_path(gitdir
))
739 gitdir
= to_free
= real_pathdup(gitdir
, 1);
741 die_errno("Could not come back to cwd");
742 ret
= setup_explicit_git_dir(gitdir
, cwd
, nongit_ok
);
747 /* #16.2, #17.2, #20.2, #21.2, #24, #25, #28, #29 (see t1510) */
748 if (is_bare_repository_cfg
> 0) {
749 set_git_dir(offset
== cwd
->len
? gitdir
: real_path(gitdir
));
751 die_errno("Could not come back to cwd");
755 /* #0, #1, #5, #8, #9, #12, #13 */
756 set_git_work_tree(".");
757 if (strcmp(gitdir
, DEFAULT_GIT_DIR_ENVIRONMENT
))
760 inside_work_tree
= 1;
761 if (offset
== cwd
->len
)
764 /* Make "offset" point past the '/' (already the case for root dirs) */
765 if (offset
!= offset_1st_component(cwd
->buf
))
767 /* Add a '/' at the end */
768 strbuf_addch(cwd
, '/');
769 return cwd
->buf
+ offset
;
772 /* #16.1, #17.1, #20.1, #21.1, #22.1 (see t1510) */
773 static const char *setup_bare_git_dir(struct strbuf
*cwd
, int offset
,
778 if (check_repository_format_gently(".", nongit_ok
))
781 setenv(GIT_IMPLICIT_WORK_TREE_ENVIRONMENT
, "0", 1);
783 /* --work-tree is set without --git-dir; use discovered one */
784 if (getenv(GIT_WORK_TREE_ENVIRONMENT
) || git_work_tree_cfg
) {
785 static const char *gitdir
;
787 gitdir
= offset
== cwd
->len
? "." : xmemdupz(cwd
->buf
, offset
);
789 die_errno("Could not come back to cwd");
790 return setup_explicit_git_dir(gitdir
, cwd
, nongit_ok
);
794 inside_work_tree
= 0;
795 if (offset
!= cwd
->len
) {
797 die_errno("Cannot come back to cwd");
798 root_len
= offset_1st_component(cwd
->buf
);
799 strbuf_setlen(cwd
, offset
> root_len
? offset
: root_len
);
800 set_git_dir(cwd
->buf
);
807 static const char *setup_nongit(const char *cwd
, int *nongit_ok
)
810 die(_("Not a git repository (or any of the parent directories): %s"), DEFAULT_GIT_DIR_ENVIRONMENT
);
812 die_errno(_("Cannot come back to cwd"));
817 static dev_t
get_device_or_die(const char *path
, const char *prefix
, int prefix_len
)
820 if (stat(path
, &buf
)) {
821 die_errno("failed to stat '%*s%s%s'",
823 prefix
? prefix
: "",
824 prefix
? "/" : "", path
);
830 * A "string_list_each_func_t" function that canonicalizes an entry
831 * from GIT_CEILING_DIRECTORIES using real_path_if_valid(), or
832 * discards it if unusable. The presence of an empty entry in
833 * GIT_CEILING_DIRECTORIES turns off canonicalization for all
834 * subsequent entries.
836 static int canonicalize_ceiling_entry(struct string_list_item
*item
,
839 int *empty_entry_found
= cb_data
;
840 char *ceil
= item
->string
;
843 *empty_entry_found
= 1;
845 } else if (!is_absolute_path(ceil
)) {
847 } else if (*empty_entry_found
) {
848 /* Keep entry but do not canonicalize it */
851 char *real_path
= real_pathdup(ceil
, 0);
856 item
->string
= real_path
;
861 enum discovery_result
{
866 /* these are errors */
867 GIT_DIR_HIT_CEILING
= -1,
868 GIT_DIR_HIT_MOUNT_POINT
= -2,
869 GIT_DIR_INVALID_GITFILE
= -3
873 * We cannot decide in this function whether we are in the work tree or
874 * not, since the config can only be read _after_ this function was called.
876 * Also, we avoid changing any global state (such as the current working
877 * directory) to allow early callers.
879 * The directory where the search should start needs to be passed in via the
880 * `dir` parameter; upon return, the `dir` buffer will contain the path of
881 * the directory where the search ended, and `gitdir` will contain the path of
882 * the discovered .git/ directory, if any. If `gitdir` is not absolute, it
883 * is relative to `dir` (i.e. *not* necessarily the cwd).
885 static enum discovery_result
setup_git_directory_gently_1(struct strbuf
*dir
,
886 struct strbuf
*gitdir
,
889 const char *env_ceiling_dirs
= getenv(CEILING_DIRECTORIES_ENVIRONMENT
);
890 struct string_list ceiling_dirs
= STRING_LIST_INIT_DUP
;
891 const char *gitdirenv
;
892 int ceil_offset
= -1, min_offset
= has_dos_drive_prefix(dir
->buf
) ? 3 : 1;
893 dev_t current_device
= 0;
894 int one_filesystem
= 1;
897 * If GIT_DIR is set explicitly, we're not going
898 * to do any discovery, but we still do repository
901 gitdirenv
= getenv(GIT_DIR_ENVIRONMENT
);
903 strbuf_addstr(gitdir
, gitdirenv
);
904 return GIT_DIR_EXPLICIT
;
907 if (env_ceiling_dirs
) {
908 int empty_entry_found
= 0;
910 string_list_split(&ceiling_dirs
, env_ceiling_dirs
, PATH_SEP
, -1);
911 filter_string_list(&ceiling_dirs
, 0,
912 canonicalize_ceiling_entry
, &empty_entry_found
);
913 ceil_offset
= longest_ancestor_length(dir
->buf
, &ceiling_dirs
);
914 string_list_clear(&ceiling_dirs
, 0);
918 ceil_offset
= min_offset
- 2;
921 * Test in the following order (relative to the dir):
922 * - .git (file containing "gitdir: <path>")
931 one_filesystem
= !git_env_bool("GIT_DISCOVERY_ACROSS_FILESYSTEM", 0);
933 current_device
= get_device_or_die(dir
->buf
, NULL
, 0);
935 int offset
= dir
->len
, error_code
= 0;
937 if (offset
> min_offset
)
938 strbuf_addch(dir
, '/');
939 strbuf_addstr(dir
, DEFAULT_GIT_DIR_ENVIRONMENT
);
940 gitdirenv
= read_gitfile_gently(dir
->buf
, die_on_error
?
944 error_code
== READ_GITFILE_ERR_NOT_A_FILE
) {
945 /* NEEDSWORK: fail if .git is not file nor dir */
946 if (is_git_directory(dir
->buf
))
947 gitdirenv
= DEFAULT_GIT_DIR_ENVIRONMENT
;
948 } else if (error_code
!= READ_GITFILE_ERR_STAT_FAILED
)
949 return GIT_DIR_INVALID_GITFILE
;
951 strbuf_setlen(dir
, offset
);
953 strbuf_addstr(gitdir
, gitdirenv
);
954 return GIT_DIR_DISCOVERED
;
957 if (is_git_directory(dir
->buf
)) {
958 strbuf_addstr(gitdir
, ".");
962 if (offset
<= min_offset
)
963 return GIT_DIR_HIT_CEILING
;
965 while (--offset
> ceil_offset
&& !is_dir_sep(dir
->buf
[offset
]))
967 if (offset
<= ceil_offset
)
968 return GIT_DIR_HIT_CEILING
;
970 strbuf_setlen(dir
, offset
> min_offset
? offset
: min_offset
);
971 if (one_filesystem
&&
972 current_device
!= get_device_or_die(dir
->buf
, NULL
, offset
))
973 return GIT_DIR_HIT_MOUNT_POINT
;
977 int discover_git_directory(struct strbuf
*commondir
,
978 struct strbuf
*gitdir
)
980 struct strbuf dir
= STRBUF_INIT
, err
= STRBUF_INIT
;
981 size_t gitdir_offset
= gitdir
->len
, cwd_len
;
982 size_t commondir_offset
= commondir
->len
;
983 struct repository_format candidate
;
985 if (strbuf_getcwd(&dir
))
989 if (setup_git_directory_gently_1(&dir
, gitdir
, 0) <= 0) {
990 strbuf_release(&dir
);
995 * The returned gitdir is relative to dir, and if dir does not reflect
996 * the current working directory, we simply make the gitdir absolute.
998 if (dir
.len
< cwd_len
&& !is_absolute_path(gitdir
->buf
+ gitdir_offset
)) {
999 /* Avoid a trailing "/." */
1000 if (!strcmp(".", gitdir
->buf
+ gitdir_offset
))
1001 strbuf_setlen(gitdir
, gitdir_offset
);
1003 strbuf_addch(&dir
, '/');
1004 strbuf_insert(gitdir
, gitdir_offset
, dir
.buf
, dir
.len
);
1007 get_common_dir(commondir
, gitdir
->buf
+ gitdir_offset
);
1010 strbuf_addf(&dir
, "%s/config", commondir
->buf
+ commondir_offset
);
1011 read_repository_format(&candidate
, dir
.buf
);
1012 strbuf_release(&dir
);
1014 if (verify_repository_format(&candidate
, &err
) < 0) {
1015 warning("ignoring git dir '%s': %s",
1016 gitdir
->buf
+ gitdir_offset
, err
.buf
);
1017 strbuf_release(&err
);
1018 strbuf_setlen(commondir
, commondir_offset
);
1019 strbuf_setlen(gitdir
, gitdir_offset
);
1026 const char *setup_git_directory_gently(int *nongit_ok
)
1028 static struct strbuf cwd
= STRBUF_INIT
;
1029 struct strbuf dir
= STRBUF_INIT
, gitdir
= STRBUF_INIT
;
1030 const char *prefix
, *env_prefix
;
1033 * We may have read an incomplete configuration before
1034 * setting-up the git directory. If so, clear the cache so
1035 * that the next queries to the configuration reload complete
1036 * configuration (including the per-repo config file that we
1037 * ignored previously).
1042 * Let's assume that we are in a git repository.
1043 * If it turns out later that we are somewhere else, the value will be
1044 * updated accordingly.
1049 if (strbuf_getcwd(&cwd
))
1050 die_errno(_("Unable to read current working directory"));
1051 strbuf_addbuf(&dir
, &cwd
);
1053 switch (setup_git_directory_gently_1(&dir
, &gitdir
, 1)) {
1057 case GIT_DIR_EXPLICIT
:
1058 prefix
= setup_explicit_git_dir(gitdir
.buf
, &cwd
, nongit_ok
);
1060 case GIT_DIR_DISCOVERED
:
1061 if (dir
.len
< cwd
.len
&& chdir(dir
.buf
))
1062 die(_("Cannot change to '%s'"), dir
.buf
);
1063 prefix
= setup_discovered_git_dir(gitdir
.buf
, &cwd
, dir
.len
,
1067 if (dir
.len
< cwd
.len
&& chdir(dir
.buf
))
1068 die(_("Cannot change to '%s'"), dir
.buf
);
1069 prefix
= setup_bare_git_dir(&cwd
, dir
.len
, nongit_ok
);
1071 case GIT_DIR_HIT_CEILING
:
1072 prefix
= setup_nongit(cwd
.buf
, nongit_ok
);
1074 case GIT_DIR_HIT_MOUNT_POINT
:
1077 strbuf_release(&cwd
);
1078 strbuf_release(&dir
);
1081 die(_("Not a git repository (or any parent up to mount point %s)\n"
1082 "Stopping at filesystem boundary (GIT_DISCOVERY_ACROSS_FILESYSTEM not set)."),
1085 die("BUG: unhandled setup_git_directory_1() result");
1089 * NEEDSWORK: This was a hack in order to get ls-files and grep to have
1090 * properly formated output when recursing submodules. Once ls-files
1091 * and grep have been changed to perform this recursing in-process this
1092 * needs to be removed.
1094 env_prefix
= getenv(GIT_TOPLEVEL_PREFIX_ENVIRONMENT
);
1096 prefix
= env_prefix
;
1099 setenv(GIT_PREFIX_ENVIRONMENT
, prefix
, 1);
1101 setenv(GIT_PREFIX_ENVIRONMENT
, "", 1);
1103 startup_info
->have_repository
= !nongit_ok
|| !*nongit_ok
;
1104 startup_info
->prefix
= prefix
;
1107 * Not all paths through the setup code will call 'set_git_dir()' (which
1108 * directly sets up the environment) so in order to guarantee that the
1109 * environment is in a consistent state after setup, explicitly setup
1110 * the environment if we have a repository.
1112 * NEEDSWORK: currently we allow bogus GIT_DIR values to be set in some
1113 * code paths so we also need to explicitly setup the environment if
1114 * the user has set GIT_DIR. It may be beneficial to disallow bogus
1115 * GIT_DIR values at some point in the future.
1117 if (startup_info
->have_repository
|| getenv(GIT_DIR_ENVIRONMENT
)) {
1118 if (!the_repository
->gitdir
) {
1119 const char *gitdir
= getenv(GIT_DIR_ENVIRONMENT
);
1121 gitdir
= DEFAULT_GIT_DIR_ENVIRONMENT
;
1122 repo_set_gitdir(the_repository
, gitdir
);
1127 strbuf_release(&dir
);
1128 strbuf_release(&gitdir
);
1133 int git_config_perm(const char *var
, const char *value
)
1141 if (!strcmp(value
, "umask"))
1143 if (!strcmp(value
, "group"))
1145 if (!strcmp(value
, "all") ||
1146 !strcmp(value
, "world") ||
1147 !strcmp(value
, "everybody"))
1148 return PERM_EVERYBODY
;
1150 /* Parse octal numbers */
1151 i
= strtol(value
, &endptr
, 8);
1153 /* If not an octal number, maybe true/false? */
1155 return git_config_bool(var
, value
) ? PERM_GROUP
: PERM_UMASK
;
1158 * Treat values 0, 1 and 2 as compatibility cases, otherwise it is
1159 * a chmod value to restrict to.
1162 case PERM_UMASK
: /* 0 */
1164 case OLD_PERM_GROUP
: /* 1 */
1166 case OLD_PERM_EVERYBODY
: /* 2 */
1167 return PERM_EVERYBODY
;
1170 /* A filemode value was given: 0xxx */
1172 if ((i
& 0600) != 0600)
1173 die(_("Problem with core.sharedRepository filemode value "
1174 "(0%.3o).\nThe owner of files must always have "
1175 "read and write permissions."), i
);
1178 * Mask filemode value. Others can not get write permission.
1179 * x flags for directories are handled separately.
1184 void check_repository_format(void)
1186 check_repository_format_gently(get_git_dir(), NULL
);
1187 startup_info
->have_repository
= 1;
1191 * Returns the "prefix", a path to the current working directory
1192 * relative to the work tree root, or NULL, if the current working
1193 * directory is not a strict subdirectory of the work tree root. The
1194 * prefix always ends with a '/' character.
1196 const char *setup_git_directory(void)
1198 return setup_git_directory_gently(NULL
);
1201 const char *resolve_gitdir_gently(const char *suspect
, int *return_error_code
)
1203 if (is_git_directory(suspect
))
1205 return read_gitfile_gently(suspect
, return_error_code
);
1208 /* if any standard file descriptor is missing open it to /dev/null */
1209 void sanitize_stdfds(void)
1211 int fd
= open("/dev/null", O_RDWR
, 0);
1212 while (fd
!= -1 && fd
< 2)
1215 die_errno("open /dev/null or dup failed");
1222 #ifdef NO_POSIX_GOODIES
1230 die_errno("fork failed");
1235 die_errno("setsid failed");