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
)
140 if (starts_with(arg
, ":/")) {
141 if (arg
[2] == '\0') /* ":/" is root dir, always exists */
145 name
= prefix_filename(prefix
, strlen(prefix
), arg
);
148 if (!lstat(name
, &st
))
149 return 1; /* file exists */
150 if (errno
== ENOENT
|| errno
== ENOTDIR
)
151 return 0; /* file does not exist */
152 die_errno("failed to stat '%s'", arg
);
155 static void NORETURN
die_verify_filename(const char *prefix
,
157 int diagnose_misspelt_rev
)
159 if (!diagnose_misspelt_rev
)
160 die(_("%s: no such path in the working tree.\n"
161 "Use 'git <command> -- <path>...' to specify paths that do not exist locally."),
164 * Saying "'(icase)foo' does not exist in the index" when the
165 * user gave us ":(icase)foo" is just stupid. A magic pathspec
166 * begins with a colon and is followed by a non-alnum; do not
167 * let maybe_die_on_misspelt_object_name() even trigger.
169 if (!(arg
[0] == ':' && !isalnum(arg
[1])))
170 maybe_die_on_misspelt_object_name(arg
, prefix
);
172 /* ... or fall back the most general message. */
173 die(_("ambiguous argument '%s': unknown revision or path not in the working tree.\n"
174 "Use '--' to separate paths from revisions, like this:\n"
175 "'git <command> [<revision>...] -- [<file>...]'"), arg
);
180 * Verify a filename that we got as an argument for a pathspec
181 * entry. Note that a filename that begins with "-" never verifies
182 * as true, because even if such a filename were to exist, we want
183 * it to be preceded by the "--" marker (or we want the user to
184 * use a format like "./-filename")
186 * The "diagnose_misspelt_rev" is used to provide a user-friendly
187 * diagnosis when dying upon finding that "name" is not a pathname.
188 * If set to 1, the diagnosis will try to diagnose "name" as an
189 * invalid object name (e.g. HEAD:foo). If set to 0, the diagnosis
190 * will only complain about an inexisting file.
192 * This function is typically called to check that a "file or rev"
193 * argument is unambiguous. In this case, the caller will want
194 * diagnose_misspelt_rev == 1 when verifying the first non-rev
195 * argument (which could have been a revision), and
196 * diagnose_misspelt_rev == 0 for the next ones (because we already
197 * saw a filename, there's not ambiguity anymore).
199 void verify_filename(const char *prefix
,
201 int diagnose_misspelt_rev
)
204 die("bad flag '%s' used after filename", arg
);
205 if (check_filename(prefix
, arg
) || !no_wildcard(arg
))
207 die_verify_filename(prefix
, arg
, diagnose_misspelt_rev
);
211 * Opposite of the above: the command line did not have -- marker
212 * and we parsed the arg as a refname. It should not be interpretable
215 void verify_non_filename(const char *prefix
, const char *arg
)
217 if (!is_inside_work_tree() || is_inside_git_dir())
221 if (!check_filename(prefix
, arg
))
223 die(_("ambiguous argument '%s': both revision and filename\n"
224 "Use '--' to separate paths from revisions, like this:\n"
225 "'git <command> [<revision>...] -- [<file>...]'"), arg
);
228 int get_common_dir(struct strbuf
*sb
, const char *gitdir
)
230 const char *git_env_common_dir
= getenv(GIT_COMMON_DIR_ENVIRONMENT
);
231 if (git_env_common_dir
) {
232 strbuf_addstr(sb
, git_env_common_dir
);
235 return get_common_dir_noenv(sb
, gitdir
);
239 int get_common_dir_noenv(struct strbuf
*sb
, const char *gitdir
)
241 struct strbuf data
= STRBUF_INIT
;
242 struct strbuf path
= STRBUF_INIT
;
245 strbuf_addf(&path
, "%s/commondir", gitdir
);
246 if (file_exists(path
.buf
)) {
247 if (strbuf_read_file(&data
, path
.buf
, 0) <= 0)
248 die_errno(_("failed to read %s"), path
.buf
);
249 while (data
.len
&& (data
.buf
[data
.len
- 1] == '\n' ||
250 data
.buf
[data
.len
- 1] == '\r'))
252 data
.buf
[data
.len
] = '\0';
254 if (!is_absolute_path(data
.buf
))
255 strbuf_addf(&path
, "%s/", gitdir
);
256 strbuf_addbuf(&path
, &data
);
257 strbuf_addstr(sb
, real_path(path
.buf
));
260 strbuf_addstr(sb
, gitdir
);
263 strbuf_release(&data
);
264 strbuf_release(&path
);
269 * Test if it looks like we're at a git directory.
272 * - either an objects/ directory _or_ the proper
273 * GIT_OBJECT_DIRECTORY environment variable
274 * - a refs/ directory
275 * - either a HEAD symlink or a HEAD file that is formatted as
276 * a proper "ref:", or a regular file HEAD that has a properly
277 * formatted sha1 object name.
279 int is_git_directory(const char *suspect
)
281 struct strbuf path
= STRBUF_INIT
;
285 /* Check worktree-related signatures */
286 strbuf_addstr(&path
, suspect
);
287 strbuf_complete(&path
, '/');
288 strbuf_addstr(&path
, "HEAD");
289 if (validate_headref(path
.buf
))
293 get_common_dir(&path
, suspect
);
296 /* Check non-worktree-related signatures */
297 if (getenv(DB_ENVIRONMENT
)) {
298 if (access(getenv(DB_ENVIRONMENT
), X_OK
))
302 strbuf_setlen(&path
, len
);
303 strbuf_addstr(&path
, "/objects");
304 if (access(path
.buf
, X_OK
))
308 strbuf_setlen(&path
, len
);
309 strbuf_addstr(&path
, "/refs");
310 if (access(path
.buf
, X_OK
))
315 strbuf_release(&path
);
319 int is_nonbare_repository_dir(struct strbuf
*path
)
323 size_t orig_path_len
= path
->len
;
324 assert(orig_path_len
!= 0);
325 strbuf_complete(path
, '/');
326 strbuf_addstr(path
, ".git");
327 if (read_gitfile_gently(path
->buf
, &gitfile_error
) || is_git_directory(path
->buf
))
329 if (gitfile_error
== READ_GITFILE_ERR_OPEN_FAILED
||
330 gitfile_error
== READ_GITFILE_ERR_READ_FAILED
)
332 strbuf_setlen(path
, orig_path_len
);
336 int is_inside_git_dir(void)
338 if (inside_git_dir
< 0)
339 inside_git_dir
= is_inside_dir(get_git_dir());
340 return inside_git_dir
;
343 int is_inside_work_tree(void)
345 if (inside_work_tree
< 0)
346 inside_work_tree
= is_inside_dir(get_git_work_tree());
347 return inside_work_tree
;
350 void setup_work_tree(void)
352 const char *work_tree
, *git_dir
;
353 static int initialized
= 0;
358 if (work_tree_config_is_bogus
)
359 die("unable to set up work tree using invalid config");
361 work_tree
= get_git_work_tree();
362 git_dir
= get_git_dir();
363 if (!is_absolute_path(git_dir
))
364 git_dir
= real_path(get_git_dir());
365 if (!work_tree
|| chdir(work_tree
))
366 die("This operation must be run in a work tree");
369 * Make sure subsequent git processes find correct worktree
370 * if $GIT_WORK_TREE is set relative
372 if (getenv(GIT_WORK_TREE_ENVIRONMENT
))
373 setenv(GIT_WORK_TREE_ENVIRONMENT
, ".", 1);
375 set_git_dir(remove_leading_path(git_dir
, work_tree
));
379 static int check_repo_format(const char *var
, const char *value
, void *vdata
)
381 struct repository_format
*data
= vdata
;
384 if (strcmp(var
, "core.repositoryformatversion") == 0)
385 data
->version
= git_config_int(var
, value
);
386 else if (skip_prefix(var
, "extensions.", &ext
)) {
388 * record any known extensions here; otherwise,
389 * we fall through to recording it as unknown, and
390 * check_repository_format will complain
392 if (!strcmp(ext
, "noop"))
394 else if (!strcmp(ext
, "preciousobjects"))
395 data
->precious_objects
= git_config_bool(var
, value
);
397 string_list_append(&data
->unknown_extensions
, ext
);
398 } else if (strcmp(var
, "core.bare") == 0) {
399 data
->is_bare
= git_config_bool(var
, value
);
400 } else if (strcmp(var
, "core.worktree") == 0) {
402 return config_error_nonbool(var
);
403 data
->work_tree
= xstrdup(value
);
408 static int check_repository_format_gently(const char *gitdir
, int *nongit_ok
)
410 struct strbuf sb
= STRBUF_INIT
;
411 struct strbuf err
= STRBUF_INIT
;
412 struct repository_format candidate
;
415 has_common
= get_common_dir(&sb
, gitdir
);
416 strbuf_addstr(&sb
, "/config");
417 read_repository_format(&candidate
, sb
.buf
);
421 * For historical use of check_repository_format() in git-init,
422 * we treat a missing config as a silent "ok", even when nongit_ok
425 if (candidate
.version
< 0)
428 if (verify_repository_format(&candidate
, &err
) < 0) {
430 warning("%s", err
.buf
);
431 strbuf_release(&err
);
438 repository_format_precious_objects
= candidate
.precious_objects
;
439 string_list_clear(&candidate
.unknown_extensions
, 0);
441 if (candidate
.is_bare
!= -1) {
442 is_bare_repository_cfg
= candidate
.is_bare
;
443 if (is_bare_repository_cfg
== 1)
444 inside_work_tree
= -1;
446 if (candidate
.work_tree
) {
447 free(git_work_tree_cfg
);
448 git_work_tree_cfg
= candidate
.work_tree
;
449 inside_work_tree
= -1;
452 free(candidate
.work_tree
);
458 int read_repository_format(struct repository_format
*format
, const char *path
)
460 memset(format
, 0, sizeof(*format
));
461 format
->version
= -1;
462 format
->is_bare
= -1;
463 string_list_init(&format
->unknown_extensions
, 1);
464 git_config_from_file(check_repo_format
, path
, format
);
465 return format
->version
;
468 int verify_repository_format(const struct repository_format
*format
,
471 if (GIT_REPO_VERSION_READ
< format
->version
) {
472 strbuf_addf(err
, _("Expected git repo version <= %d, found %d"),
473 GIT_REPO_VERSION_READ
, format
->version
);
477 if (format
->version
>= 1 && format
->unknown_extensions
.nr
) {
480 strbuf_addstr(err
, _("unknown repository extensions found:"));
482 for (i
= 0; i
< format
->unknown_extensions
.nr
; i
++)
483 strbuf_addf(err
, "\n\t%s",
484 format
->unknown_extensions
.items
[i
].string
);
491 void read_gitfile_error_die(int error_code
, const char *path
, const char *dir
)
493 switch (error_code
) {
494 case READ_GITFILE_ERR_STAT_FAILED
:
495 case READ_GITFILE_ERR_NOT_A_FILE
:
496 /* non-fatal; follow return path */
498 case READ_GITFILE_ERR_OPEN_FAILED
:
499 die_errno("Error opening '%s'", path
);
500 case READ_GITFILE_ERR_TOO_LARGE
:
501 die("Too large to be a .git file: '%s'", path
);
502 case READ_GITFILE_ERR_READ_FAILED
:
503 die("Error reading %s", path
);
504 case READ_GITFILE_ERR_INVALID_FORMAT
:
505 die("Invalid gitfile format: %s", path
);
506 case READ_GITFILE_ERR_NO_PATH
:
507 die("No path in gitfile: %s", path
);
508 case READ_GITFILE_ERR_NOT_A_REPO
:
509 die("Not a git repository: %s", dir
);
511 die("BUG: unknown error code");
516 * Try to read the location of the git directory from the .git file,
517 * return path to git directory if found.
519 * On failure, if return_error_code is not NULL, return_error_code
520 * will be set to an error code and NULL will be returned. If
521 * return_error_code is NULL the function will die instead (for most
524 const char *read_gitfile_gently(const char *path
, int *return_error_code
)
526 const int max_file_size
= 1 << 20; /* 1MB */
535 if (stat(path
, &st
)) {
536 /* NEEDSWORK: discern between ENOENT vs other errors */
537 error_code
= READ_GITFILE_ERR_STAT_FAILED
;
540 if (!S_ISREG(st
.st_mode
)) {
541 error_code
= READ_GITFILE_ERR_NOT_A_FILE
;
544 if (st
.st_size
> max_file_size
) {
545 error_code
= READ_GITFILE_ERR_TOO_LARGE
;
548 fd
= open(path
, O_RDONLY
);
550 error_code
= READ_GITFILE_ERR_OPEN_FAILED
;
553 buf
= xmallocz(st
.st_size
);
554 len
= read_in_full(fd
, buf
, st
.st_size
);
556 if (len
!= st
.st_size
) {
557 error_code
= READ_GITFILE_ERR_READ_FAILED
;
560 if (!starts_with(buf
, "gitdir: ")) {
561 error_code
= READ_GITFILE_ERR_INVALID_FORMAT
;
564 while (buf
[len
- 1] == '\n' || buf
[len
- 1] == '\r')
567 error_code
= READ_GITFILE_ERR_NO_PATH
;
573 if (!is_absolute_path(dir
) && (slash
= strrchr(path
, '/'))) {
574 size_t pathlen
= slash
+1 - path
;
575 dir
= xstrfmt("%.*s%.*s", (int)pathlen
, path
,
576 (int)(len
- 8), buf
+ 8);
580 if (!is_git_directory(dir
)) {
581 error_code
= READ_GITFILE_ERR_NOT_A_REPO
;
584 path
= real_path(dir
);
587 if (return_error_code
)
588 *return_error_code
= error_code
;
590 read_gitfile_error_die(error_code
, path
, dir
);
593 return error_code
? NULL
: path
;
596 static const char *setup_explicit_git_dir(const char *gitdirenv
,
600 const char *work_tree_env
= getenv(GIT_WORK_TREE_ENVIRONMENT
);
601 const char *worktree
;
605 if (PATH_MAX
- 40 < strlen(gitdirenv
))
606 die("'$%s' too big", GIT_DIR_ENVIRONMENT
);
608 gitfile
= (char*)read_gitfile(gitdirenv
);
610 gitfile
= xstrdup(gitfile
);
614 if (!is_git_directory(gitdirenv
)) {
620 die("Not a git repository: '%s'", gitdirenv
);
623 if (check_repository_format_gently(gitdirenv
, nongit_ok
)) {
628 /* #3, #7, #11, #15, #19, #23, #27, #31 (see t1510) */
630 set_git_work_tree(work_tree_env
);
631 else if (is_bare_repository_cfg
> 0) {
632 if (git_work_tree_cfg
) {
634 warning("core.bare and core.worktree do not make sense");
635 work_tree_config_is_bogus
= 1;
639 set_git_dir(gitdirenv
);
643 else if (git_work_tree_cfg
) { /* #6, #14 */
644 if (is_absolute_path(git_work_tree_cfg
))
645 set_git_work_tree(git_work_tree_cfg
);
648 if (chdir(gitdirenv
))
649 die_errno("Could not chdir to '%s'", gitdirenv
);
650 if (chdir(git_work_tree_cfg
))
651 die_errno("Could not chdir to '%s'", git_work_tree_cfg
);
652 core_worktree
= xgetcwd();
654 die_errno("Could not come back to cwd");
655 set_git_work_tree(core_worktree
);
659 else if (!git_env_bool(GIT_IMPLICIT_WORK_TREE_ENVIRONMENT
, 1)) {
661 set_git_dir(gitdirenv
);
666 set_git_work_tree(".");
668 /* set_git_work_tree() must have been called by now */
669 worktree
= get_git_work_tree();
671 /* both get_git_work_tree() and cwd are already normalized */
672 if (!strcmp(cwd
->buf
, worktree
)) { /* cwd == worktree */
673 set_git_dir(gitdirenv
);
678 offset
= dir_inside_of(cwd
->buf
, worktree
);
679 if (offset
>= 0) { /* cwd inside worktree? */
680 set_git_dir(real_path(gitdirenv
));
682 die_errno("Could not chdir to '%s'", worktree
);
683 strbuf_addch(cwd
, '/');
685 return cwd
->buf
+ offset
;
688 /* cwd outside worktree */
689 set_git_dir(gitdirenv
);
694 static const char *setup_discovered_git_dir(const char *gitdir
,
695 struct strbuf
*cwd
, int offset
,
698 if (check_repository_format_gently(gitdir
, nongit_ok
))
701 /* --work-tree is set without --git-dir; use discovered one */
702 if (getenv(GIT_WORK_TREE_ENVIRONMENT
) || git_work_tree_cfg
) {
703 if (offset
!= cwd
->len
&& !is_absolute_path(gitdir
))
704 gitdir
= real_pathdup(gitdir
);
706 die_errno("Could not come back to cwd");
707 return setup_explicit_git_dir(gitdir
, cwd
, nongit_ok
);
710 /* #16.2, #17.2, #20.2, #21.2, #24, #25, #28, #29 (see t1510) */
711 if (is_bare_repository_cfg
> 0) {
712 set_git_dir(offset
== cwd
->len
? gitdir
: real_path(gitdir
));
714 die_errno("Could not come back to cwd");
718 /* #0, #1, #5, #8, #9, #12, #13 */
719 set_git_work_tree(".");
720 if (strcmp(gitdir
, DEFAULT_GIT_DIR_ENVIRONMENT
))
723 inside_work_tree
= 1;
724 if (offset
== cwd
->len
)
727 /* Make "offset" point past the '/' (already the case for root dirs) */
728 if (offset
!= offset_1st_component(cwd
->buf
))
730 /* Add a '/' at the end */
731 strbuf_addch(cwd
, '/');
732 return cwd
->buf
+ offset
;
735 /* #16.1, #17.1, #20.1, #21.1, #22.1 (see t1510) */
736 static const char *setup_bare_git_dir(struct strbuf
*cwd
, int offset
,
741 if (check_repository_format_gently(".", nongit_ok
))
744 setenv(GIT_IMPLICIT_WORK_TREE_ENVIRONMENT
, "0", 1);
746 /* --work-tree is set without --git-dir; use discovered one */
747 if (getenv(GIT_WORK_TREE_ENVIRONMENT
) || git_work_tree_cfg
) {
750 gitdir
= offset
== cwd
->len
? "." : xmemdupz(cwd
->buf
, offset
);
752 die_errno("Could not come back to cwd");
753 return setup_explicit_git_dir(gitdir
, cwd
, nongit_ok
);
757 inside_work_tree
= 0;
758 if (offset
!= cwd
->len
) {
760 die_errno("Cannot come back to cwd");
761 root_len
= offset_1st_component(cwd
->buf
);
762 strbuf_setlen(cwd
, offset
> root_len
? offset
: root_len
);
763 set_git_dir(cwd
->buf
);
770 static const char *setup_nongit(const char *cwd
, int *nongit_ok
)
773 die(_("Not a git repository (or any of the parent directories): %s"), DEFAULT_GIT_DIR_ENVIRONMENT
);
775 die_errno(_("Cannot come back to cwd"));
780 static dev_t
get_device_or_die(const char *path
, const char *prefix
, int prefix_len
)
783 if (stat(path
, &buf
)) {
784 die_errno("failed to stat '%*s%s%s'",
786 prefix
? prefix
: "",
787 prefix
? "/" : "", path
);
793 * A "string_list_each_func_t" function that canonicalizes an entry
794 * from GIT_CEILING_DIRECTORIES using real_path_if_valid(), or
795 * discards it if unusable. The presence of an empty entry in
796 * GIT_CEILING_DIRECTORIES turns off canonicalization for all
797 * subsequent entries.
799 static int canonicalize_ceiling_entry(struct string_list_item
*item
,
802 int *empty_entry_found
= cb_data
;
803 char *ceil
= item
->string
;
806 *empty_entry_found
= 1;
808 } else if (!is_absolute_path(ceil
)) {
810 } else if (*empty_entry_found
) {
811 /* Keep entry but do not canonicalize it */
814 char *real_path
= real_pathdup(ceil
);
819 item
->string
= real_path
;
824 enum discovery_result
{
829 /* these are errors */
830 GIT_DIR_HIT_CEILING
= -1,
831 GIT_DIR_HIT_MOUNT_POINT
= -2,
832 GIT_DIR_INVALID_GITFILE
= -3
836 * We cannot decide in this function whether we are in the work tree or
837 * not, since the config can only be read _after_ this function was called.
839 * Also, we avoid changing any global state (such as the current working
840 * directory) to allow early callers.
842 * The directory where the search should start needs to be passed in via the
843 * `dir` parameter; upon return, the `dir` buffer will contain the path of
844 * the directory where the search ended, and `gitdir` will contain the path of
845 * the discovered .git/ directory, if any. If `gitdir` is not absolute, it
846 * is relative to `dir` (i.e. *not* necessarily the cwd).
848 static enum discovery_result
setup_git_directory_gently_1(struct strbuf
*dir
,
849 struct strbuf
*gitdir
,
852 const char *env_ceiling_dirs
= getenv(CEILING_DIRECTORIES_ENVIRONMENT
);
853 struct string_list ceiling_dirs
= STRING_LIST_INIT_DUP
;
854 const char *gitdirenv
;
855 int ceil_offset
= -1, min_offset
= has_dos_drive_prefix(dir
->buf
) ? 3 : 1;
856 dev_t current_device
= 0;
857 int one_filesystem
= 1;
860 * If GIT_DIR is set explicitly, we're not going
861 * to do any discovery, but we still do repository
864 gitdirenv
= getenv(GIT_DIR_ENVIRONMENT
);
866 strbuf_addstr(gitdir
, gitdirenv
);
867 return GIT_DIR_EXPLICIT
;
870 if (env_ceiling_dirs
) {
871 int empty_entry_found
= 0;
873 string_list_split(&ceiling_dirs
, env_ceiling_dirs
, PATH_SEP
, -1);
874 filter_string_list(&ceiling_dirs
, 0,
875 canonicalize_ceiling_entry
, &empty_entry_found
);
876 ceil_offset
= longest_ancestor_length(dir
->buf
, &ceiling_dirs
);
877 string_list_clear(&ceiling_dirs
, 0);
881 ceil_offset
= min_offset
- 2;
884 * Test in the following order (relative to the dir):
885 * - .git (file containing "gitdir: <path>")
894 one_filesystem
= !git_env_bool("GIT_DISCOVERY_ACROSS_FILESYSTEM", 0);
896 current_device
= get_device_or_die(dir
->buf
, NULL
, 0);
898 int offset
= dir
->len
, error_code
= 0;
900 if (offset
> min_offset
)
901 strbuf_addch(dir
, '/');
902 strbuf_addstr(dir
, DEFAULT_GIT_DIR_ENVIRONMENT
);
903 gitdirenv
= read_gitfile_gently(dir
->buf
, die_on_error
?
907 error_code
== READ_GITFILE_ERR_NOT_A_FILE
) {
908 /* NEEDSWORK: fail if .git is not file nor dir */
909 if (is_git_directory(dir
->buf
))
910 gitdirenv
= DEFAULT_GIT_DIR_ENVIRONMENT
;
911 } else if (error_code
!= READ_GITFILE_ERR_STAT_FAILED
)
912 return GIT_DIR_INVALID_GITFILE
;
914 strbuf_setlen(dir
, offset
);
916 strbuf_addstr(gitdir
, gitdirenv
);
917 return GIT_DIR_DISCOVERED
;
920 if (is_git_directory(dir
->buf
)) {
921 strbuf_addstr(gitdir
, ".");
925 if (offset
<= min_offset
)
926 return GIT_DIR_HIT_CEILING
;
928 while (--offset
> ceil_offset
&& !is_dir_sep(dir
->buf
[offset
]))
930 if (offset
<= ceil_offset
)
931 return GIT_DIR_HIT_CEILING
;
933 strbuf_setlen(dir
, offset
> min_offset
? offset
: min_offset
);
934 if (one_filesystem
&&
935 current_device
!= get_device_or_die(dir
->buf
, NULL
, offset
))
936 return GIT_DIR_HIT_MOUNT_POINT
;
940 const char *discover_git_directory(struct strbuf
*gitdir
)
942 struct strbuf dir
= STRBUF_INIT
, err
= STRBUF_INIT
;
943 size_t gitdir_offset
= gitdir
->len
, cwd_len
;
944 struct repository_format candidate
;
946 if (strbuf_getcwd(&dir
))
950 if (setup_git_directory_gently_1(&dir
, gitdir
, 0) <= 0) {
951 strbuf_release(&dir
);
956 * The returned gitdir is relative to dir, and if dir does not reflect
957 * the current working directory, we simply make the gitdir absolute.
959 if (dir
.len
< cwd_len
&& !is_absolute_path(gitdir
->buf
+ gitdir_offset
)) {
960 /* Avoid a trailing "/." */
961 if (!strcmp(".", gitdir
->buf
+ gitdir_offset
))
962 strbuf_setlen(gitdir
, gitdir_offset
);
964 strbuf_addch(&dir
, '/');
965 strbuf_insert(gitdir
, gitdir_offset
, dir
.buf
, dir
.len
);
969 strbuf_addf(&dir
, "%s/config", gitdir
->buf
+ gitdir_offset
);
970 read_repository_format(&candidate
, dir
.buf
);
971 strbuf_release(&dir
);
973 if (verify_repository_format(&candidate
, &err
) < 0) {
974 warning("ignoring git dir '%s': %s",
975 gitdir
->buf
+ gitdir_offset
, err
.buf
);
976 strbuf_release(&err
);
980 return gitdir
->buf
+ gitdir_offset
;
983 const char *setup_git_directory_gently(int *nongit_ok
)
985 static struct strbuf cwd
= STRBUF_INIT
;
986 struct strbuf dir
= STRBUF_INIT
, gitdir
= STRBUF_INIT
;
990 * We may have read an incomplete configuration before
991 * setting-up the git directory. If so, clear the cache so
992 * that the next queries to the configuration reload complete
993 * configuration (including the per-repo config file that we
994 * ignored previously).
999 * Let's assume that we are in a git repository.
1000 * If it turns out later that we are somewhere else, the value will be
1001 * updated accordingly.
1006 if (strbuf_getcwd(&cwd
))
1007 die_errno(_("Unable to read current working directory"));
1008 strbuf_addbuf(&dir
, &cwd
);
1010 switch (setup_git_directory_gently_1(&dir
, &gitdir
, 1)) {
1014 case GIT_DIR_EXPLICIT
:
1015 prefix
= setup_explicit_git_dir(gitdir
.buf
, &cwd
, nongit_ok
);
1017 case GIT_DIR_DISCOVERED
:
1018 if (dir
.len
< cwd
.len
&& chdir(dir
.buf
))
1019 die(_("Cannot change to '%s'"), dir
.buf
);
1020 prefix
= setup_discovered_git_dir(gitdir
.buf
, &cwd
, dir
.len
,
1024 if (dir
.len
< cwd
.len
&& chdir(dir
.buf
))
1025 die(_("Cannot change to '%s'"), dir
.buf
);
1026 prefix
= setup_bare_git_dir(&cwd
, dir
.len
, nongit_ok
);
1028 case GIT_DIR_HIT_CEILING
:
1029 prefix
= setup_nongit(cwd
.buf
, nongit_ok
);
1031 case GIT_DIR_HIT_MOUNT_POINT
:
1034 strbuf_release(&cwd
);
1035 strbuf_release(&dir
);
1038 die(_("Not a git repository (or any parent up to mount point %s)\n"
1039 "Stopping at filesystem boundary (GIT_DISCOVERY_ACROSS_FILESYSTEM not set)."),
1042 die("BUG: unhandled setup_git_directory_1() result");
1046 setenv(GIT_PREFIX_ENVIRONMENT
, prefix
, 1);
1048 setenv(GIT_PREFIX_ENVIRONMENT
, "", 1);
1050 startup_info
->have_repository
= !nongit_ok
|| !*nongit_ok
;
1051 startup_info
->prefix
= prefix
;
1053 strbuf_release(&dir
);
1054 strbuf_release(&gitdir
);
1059 int git_config_perm(const char *var
, const char *value
)
1067 if (!strcmp(value
, "umask"))
1069 if (!strcmp(value
, "group"))
1071 if (!strcmp(value
, "all") ||
1072 !strcmp(value
, "world") ||
1073 !strcmp(value
, "everybody"))
1074 return PERM_EVERYBODY
;
1076 /* Parse octal numbers */
1077 i
= strtol(value
, &endptr
, 8);
1079 /* If not an octal number, maybe true/false? */
1081 return git_config_bool(var
, value
) ? PERM_GROUP
: PERM_UMASK
;
1084 * Treat values 0, 1 and 2 as compatibility cases, otherwise it is
1085 * a chmod value to restrict to.
1088 case PERM_UMASK
: /* 0 */
1090 case OLD_PERM_GROUP
: /* 1 */
1092 case OLD_PERM_EVERYBODY
: /* 2 */
1093 return PERM_EVERYBODY
;
1096 /* A filemode value was given: 0xxx */
1098 if ((i
& 0600) != 0600)
1099 die(_("Problem with core.sharedRepository filemode value "
1100 "(0%.3o).\nThe owner of files must always have "
1101 "read and write permissions."), i
);
1104 * Mask filemode value. Others can not get write permission.
1105 * x flags for directories are handled separately.
1110 void check_repository_format(void)
1112 check_repository_format_gently(get_git_dir(), NULL
);
1113 startup_info
->have_repository
= 1;
1117 * Returns the "prefix", a path to the current working directory
1118 * relative to the work tree root, or NULL, if the current working
1119 * directory is not a strict subdirectory of the work tree root. The
1120 * prefix always ends with a '/' character.
1122 const char *setup_git_directory(void)
1124 return setup_git_directory_gently(NULL
);
1127 const char *resolve_gitdir_gently(const char *suspect
, int *return_error_code
)
1129 if (is_git_directory(suspect
))
1131 return read_gitfile_gently(suspect
, return_error_code
);
1134 /* if any standard file descriptor is missing open it to /dev/null */
1135 void sanitize_stdfds(void)
1137 int fd
= open("/dev/null", O_RDWR
, 0);
1138 while (fd
!= -1 && fd
< 2)
1141 die_errno("open /dev/null or dup failed");
1148 #ifdef NO_POSIX_GOODIES
1156 die_errno("fork failed");
1161 die_errno("setsid failed");