2 #include "repository.h"
5 #include "string-list.h"
6 #include "chdir-notify.h"
8 static int inside_git_dir
= -1;
9 static int inside_work_tree
= -1;
10 static int work_tree_config_is_bogus
;
12 static struct startup_info the_startup_info
;
13 struct startup_info
*startup_info
= &the_startup_info
;
16 * The input parameter must contain an absolute path, and it must already be
19 * Find the part of an absolute path that lies inside the work tree by
20 * dereferencing symlinks outside the work tree, for example:
21 * /dir1/repo/dir2/file (work tree is /dir1/repo) -> dir2/file
22 * /dir/file (work tree is /) -> dir/file
23 * /dir/symlink1/symlink2 (symlink1 points to work tree) -> symlink2
24 * /dir/repolink/file (repolink points to /dir/repo) -> file
25 * /dir/repo (exactly equal to work tree) -> (empty string)
27 static int abspath_part_inside_repo(char *path
)
33 const char *work_tree
= get_git_work_tree();
37 wtlen
= strlen(work_tree
);
39 off
= offset_1st_component(path
);
41 /* check if work tree is already the prefix */
42 if (wtlen
<= len
&& !strncmp(path
, work_tree
, wtlen
)) {
43 if (path
[wtlen
] == '/') {
44 memmove(path
, path
+ wtlen
+ 1, len
- wtlen
);
46 } else if (path
[wtlen
- 1] == '/' || path
[wtlen
] == '\0') {
47 /* work tree is the root, or the whole path */
48 memmove(path
, path
+ wtlen
, len
- wtlen
+ 1);
51 /* work tree might match beginning of a symlink to work tree */
57 /* check each '/'-terminated level */
62 if (strcmp(real_path(path0
), work_tree
) == 0) {
63 memmove(path0
, path
+ 1, len
- (path
- path0
));
70 /* check whole path */
71 if (strcmp(real_path(path0
), work_tree
) == 0) {
80 * Normalize "path", prepending the "prefix" for relative paths. If
81 * remaining_prefix is not NULL, return the actual prefix still
82 * remains in the path. For example, prefix = sub1/sub2/ and path is
84 * foo -> sub1/sub2/foo (full prefix)
85 * ../foo -> sub1/foo (remaining prefix is sub1/)
86 * ../../bar -> bar (no remaining prefix)
87 * ../../sub1/sub2/foo -> sub1/sub2/foo (but no remaining prefix)
88 * `pwd`/../bar -> sub1/bar (no remaining prefix)
90 char *prefix_path_gently(const char *prefix
, int len
,
91 int *remaining_prefix
, const char *path
)
93 const char *orig
= path
;
95 if (is_absolute_path(orig
)) {
96 sanitized
= xmallocz(strlen(path
));
98 *remaining_prefix
= 0;
99 if (normalize_path_copy_len(sanitized
, path
, remaining_prefix
)) {
103 if (abspath_part_inside_repo(sanitized
)) {
108 sanitized
= xstrfmt("%.*s%s", len
, len
? prefix
: "", path
);
109 if (remaining_prefix
)
110 *remaining_prefix
= len
;
111 if (normalize_path_copy_len(sanitized
, sanitized
, remaining_prefix
)) {
119 char *prefix_path(const char *prefix
, int len
, const char *path
)
121 char *r
= prefix_path_gently(prefix
, len
, NULL
, path
);
123 die(_("'%s' is outside repository"), path
);
127 int path_inside_repo(const char *prefix
, const char *path
)
129 int len
= prefix
? strlen(prefix
) : 0;
130 char *r
= prefix_path_gently(prefix
, len
, NULL
, path
);
138 int check_filename(const char *prefix
, const char *arg
)
140 char *to_free
= NULL
;
143 if (skip_prefix(arg
, ":/", &arg
)) {
144 if (!*arg
) /* ":/" is root dir, always exists */
147 } else if (skip_prefix(arg
, ":!", &arg
) ||
148 skip_prefix(arg
, ":^", &arg
)) {
149 if (!*arg
) /* excluding everything is silly, but allowed */
154 arg
= to_free
= prefix_filename(prefix
, arg
);
156 if (!lstat(arg
, &st
)) {
158 return 1; /* file exists */
160 if (is_missing_file_error(errno
)) {
162 return 0; /* file does not exist */
164 die_errno(_("failed to stat '%s'"), arg
);
167 static void NORETURN
die_verify_filename(const char *prefix
,
169 int diagnose_misspelt_rev
)
171 if (!diagnose_misspelt_rev
)
172 die(_("%s: no such path in the working tree.\n"
173 "Use 'git <command> -- <path>...' to specify paths that do not exist locally."),
176 * Saying "'(icase)foo' does not exist in the index" when the
177 * user gave us ":(icase)foo" is just stupid. A magic pathspec
178 * begins with a colon and is followed by a non-alnum; do not
179 * let maybe_die_on_misspelt_object_name() even trigger.
181 if (!(arg
[0] == ':' && !isalnum(arg
[1])))
182 maybe_die_on_misspelt_object_name(arg
, prefix
);
184 /* ... or fall back the most general message. */
185 die(_("ambiguous argument '%s': unknown revision or path not in the working tree.\n"
186 "Use '--' to separate paths from revisions, like this:\n"
187 "'git <command> [<revision>...] -- [<file>...]'"), arg
);
192 * Check for arguments that don't resolve as actual files,
193 * but which look sufficiently like pathspecs that we'll consider
194 * them such for the purposes of rev/pathspec DWIM parsing.
196 static int looks_like_pathspec(const char *arg
)
198 /* anything with a wildcard character */
199 if (!no_wildcard(arg
))
202 /* long-form pathspec magic */
203 if (starts_with(arg
, ":("))
210 * Verify a filename that we got as an argument for a pathspec
211 * entry. Note that a filename that begins with "-" never verifies
212 * as true, because even if such a filename were to exist, we want
213 * it to be preceded by the "--" marker (or we want the user to
214 * use a format like "./-filename")
216 * The "diagnose_misspelt_rev" is used to provide a user-friendly
217 * diagnosis when dying upon finding that "name" is not a pathname.
218 * If set to 1, the diagnosis will try to diagnose "name" as an
219 * invalid object name (e.g. HEAD:foo). If set to 0, the diagnosis
220 * will only complain about an inexisting file.
222 * This function is typically called to check that a "file or rev"
223 * argument is unambiguous. In this case, the caller will want
224 * diagnose_misspelt_rev == 1 when verifying the first non-rev
225 * argument (which could have been a revision), and
226 * diagnose_misspelt_rev == 0 for the next ones (because we already
227 * saw a filename, there's not ambiguity anymore).
229 void verify_filename(const char *prefix
,
231 int diagnose_misspelt_rev
)
234 die(_("option '%s' must come before non-option arguments"), arg
);
235 if (looks_like_pathspec(arg
) || check_filename(prefix
, arg
))
237 die_verify_filename(prefix
, arg
, diagnose_misspelt_rev
);
241 * Opposite of the above: the command line did not have -- marker
242 * and we parsed the arg as a refname. It should not be interpretable
245 void verify_non_filename(const char *prefix
, const char *arg
)
247 if (!is_inside_work_tree() || is_inside_git_dir())
251 if (!check_filename(prefix
, arg
))
253 die(_("ambiguous argument '%s': both revision and filename\n"
254 "Use '--' to separate paths from revisions, like this:\n"
255 "'git <command> [<revision>...] -- [<file>...]'"), arg
);
258 int get_common_dir(struct strbuf
*sb
, const char *gitdir
)
260 const char *git_env_common_dir
= getenv(GIT_COMMON_DIR_ENVIRONMENT
);
261 if (git_env_common_dir
) {
262 strbuf_addstr(sb
, git_env_common_dir
);
265 return get_common_dir_noenv(sb
, gitdir
);
269 int get_common_dir_noenv(struct strbuf
*sb
, const char *gitdir
)
271 struct strbuf data
= STRBUF_INIT
;
272 struct strbuf path
= STRBUF_INIT
;
275 strbuf_addf(&path
, "%s/commondir", gitdir
);
276 if (file_exists(path
.buf
)) {
277 if (strbuf_read_file(&data
, path
.buf
, 0) <= 0)
278 die_errno(_("failed to read %s"), path
.buf
);
279 while (data
.len
&& (data
.buf
[data
.len
- 1] == '\n' ||
280 data
.buf
[data
.len
- 1] == '\r'))
282 data
.buf
[data
.len
] = '\0';
284 if (!is_absolute_path(data
.buf
))
285 strbuf_addf(&path
, "%s/", gitdir
);
286 strbuf_addbuf(&path
, &data
);
287 strbuf_add_real_path(sb
, path
.buf
);
290 strbuf_addstr(sb
, gitdir
);
293 strbuf_release(&data
);
294 strbuf_release(&path
);
299 * Test if it looks like we're at a git directory.
302 * - either an objects/ directory _or_ the proper
303 * GIT_OBJECT_DIRECTORY environment variable
304 * - a refs/ directory
305 * - either a HEAD symlink or a HEAD file that is formatted as
306 * a proper "ref:", or a regular file HEAD that has a properly
307 * formatted sha1 object name.
309 int is_git_directory(const char *suspect
)
311 struct strbuf path
= STRBUF_INIT
;
315 /* Check worktree-related signatures */
316 strbuf_addstr(&path
, suspect
);
317 strbuf_complete(&path
, '/');
318 strbuf_addstr(&path
, "HEAD");
319 if (validate_headref(path
.buf
))
323 get_common_dir(&path
, suspect
);
326 /* Check non-worktree-related signatures */
327 if (getenv(DB_ENVIRONMENT
)) {
328 if (access(getenv(DB_ENVIRONMENT
), X_OK
))
332 strbuf_setlen(&path
, len
);
333 strbuf_addstr(&path
, "/objects");
334 if (access(path
.buf
, X_OK
))
338 strbuf_setlen(&path
, len
);
339 strbuf_addstr(&path
, "/refs");
340 if (access(path
.buf
, X_OK
))
345 strbuf_release(&path
);
349 int is_nonbare_repository_dir(struct strbuf
*path
)
353 size_t orig_path_len
= path
->len
;
354 assert(orig_path_len
!= 0);
355 strbuf_complete(path
, '/');
356 strbuf_addstr(path
, ".git");
357 if (read_gitfile_gently(path
->buf
, &gitfile_error
) || is_git_directory(path
->buf
))
359 if (gitfile_error
== READ_GITFILE_ERR_OPEN_FAILED
||
360 gitfile_error
== READ_GITFILE_ERR_READ_FAILED
)
362 strbuf_setlen(path
, orig_path_len
);
366 int is_inside_git_dir(void)
368 if (inside_git_dir
< 0)
369 inside_git_dir
= is_inside_dir(get_git_dir());
370 return inside_git_dir
;
373 int is_inside_work_tree(void)
375 if (inside_work_tree
< 0)
376 inside_work_tree
= is_inside_dir(get_git_work_tree());
377 return inside_work_tree
;
380 void setup_work_tree(void)
382 const char *work_tree
;
383 static int initialized
= 0;
388 if (work_tree_config_is_bogus
)
389 die(_("unable to set up work tree using invalid config"));
391 work_tree
= get_git_work_tree();
392 if (!work_tree
|| chdir_notify(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);
405 static int check_repo_format(const char *var
, const char *value
, void *vdata
)
407 struct repository_format
*data
= vdata
;
410 if (strcmp(var
, "core.repositoryformatversion") == 0)
411 data
->version
= git_config_int(var
, value
);
412 else if (skip_prefix(var
, "extensions.", &ext
)) {
414 * record any known extensions here; otherwise,
415 * we fall through to recording it as unknown, and
416 * check_repository_format will complain
418 if (!strcmp(ext
, "noop"))
420 else if (!strcmp(ext
, "preciousobjects"))
421 data
->precious_objects
= git_config_bool(var
, value
);
422 else if (!strcmp(ext
, "partialclone")) {
424 return config_error_nonbool(var
);
425 data
->partial_clone
= xstrdup(value
);
427 string_list_append(&data
->unknown_extensions
, ext
);
428 } else if (strcmp(var
, "core.bare") == 0) {
429 data
->is_bare
= git_config_bool(var
, value
);
430 } else if (strcmp(var
, "core.worktree") == 0) {
432 return config_error_nonbool(var
);
433 data
->work_tree
= xstrdup(value
);
438 static int check_repository_format_gently(const char *gitdir
, struct repository_format
*candidate
, int *nongit_ok
)
440 struct strbuf sb
= STRBUF_INIT
;
441 struct strbuf err
= STRBUF_INIT
;
444 has_common
= get_common_dir(&sb
, gitdir
);
445 strbuf_addstr(&sb
, "/config");
446 read_repository_format(candidate
, sb
.buf
);
450 * For historical use of check_repository_format() in git-init,
451 * we treat a missing config as a silent "ok", even when nongit_ok
454 if (candidate
->version
< 0)
457 if (verify_repository_format(candidate
, &err
) < 0) {
459 warning("%s", err
.buf
);
460 strbuf_release(&err
);
467 repository_format_precious_objects
= candidate
->precious_objects
;
468 repository_format_partial_clone
= candidate
->partial_clone
;
469 string_list_clear(&candidate
->unknown_extensions
, 0);
471 if (candidate
->is_bare
!= -1) {
472 is_bare_repository_cfg
= candidate
->is_bare
;
473 if (is_bare_repository_cfg
== 1)
474 inside_work_tree
= -1;
476 if (candidate
->work_tree
) {
477 free(git_work_tree_cfg
);
478 git_work_tree_cfg
= candidate
->work_tree
;
479 inside_work_tree
= -1;
482 free(candidate
->work_tree
);
488 int read_repository_format(struct repository_format
*format
, const char *path
)
490 memset(format
, 0, sizeof(*format
));
491 format
->version
= -1;
492 format
->is_bare
= -1;
493 format
->hash_algo
= GIT_HASH_SHA1
;
494 string_list_init(&format
->unknown_extensions
, 1);
495 git_config_from_file(check_repo_format
, path
, format
);
496 return format
->version
;
499 int verify_repository_format(const struct repository_format
*format
,
502 if (GIT_REPO_VERSION_READ
< format
->version
) {
503 strbuf_addf(err
, _("Expected git repo version <= %d, found %d"),
504 GIT_REPO_VERSION_READ
, format
->version
);
508 if (format
->version
>= 1 && format
->unknown_extensions
.nr
) {
511 strbuf_addstr(err
, _("unknown repository extensions found:"));
513 for (i
= 0; i
< format
->unknown_extensions
.nr
; i
++)
514 strbuf_addf(err
, "\n\t%s",
515 format
->unknown_extensions
.items
[i
].string
);
522 void read_gitfile_error_die(int error_code
, const char *path
, const char *dir
)
524 switch (error_code
) {
525 case READ_GITFILE_ERR_STAT_FAILED
:
526 case READ_GITFILE_ERR_NOT_A_FILE
:
527 /* non-fatal; follow return path */
529 case READ_GITFILE_ERR_OPEN_FAILED
:
530 die_errno(_("error opening '%s'"), path
);
531 case READ_GITFILE_ERR_TOO_LARGE
:
532 die(_("too large to be a .git file: '%s'"), path
);
533 case READ_GITFILE_ERR_READ_FAILED
:
534 die(_("error reading %s"), path
);
535 case READ_GITFILE_ERR_INVALID_FORMAT
:
536 die(_("invalid gitfile format: %s"), path
);
537 case READ_GITFILE_ERR_NO_PATH
:
538 die(_("no path in gitfile: %s"), path
);
539 case READ_GITFILE_ERR_NOT_A_REPO
:
540 die(_("not a git repository: %s"), dir
);
542 BUG("unknown error code");
547 * Try to read the location of the git directory from the .git file,
548 * return path to git directory if found. The return value comes from
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
,
630 struct repository_format
*repo_fmt
,
633 const char *work_tree_env
= getenv(GIT_WORK_TREE_ENVIRONMENT
);
634 const char *worktree
;
638 if (PATH_MAX
- 40 < strlen(gitdirenv
))
639 die(_("'$%s' too big"), GIT_DIR_ENVIRONMENT
);
641 gitfile
= (char*)read_gitfile(gitdirenv
);
643 gitfile
= xstrdup(gitfile
);
647 if (!is_git_directory(gitdirenv
)) {
653 die(_("not a git repository: '%s'"), gitdirenv
);
656 if (check_repository_format_gently(gitdirenv
, repo_fmt
, nongit_ok
)) {
661 /* #3, #7, #11, #15, #19, #23, #27, #31 (see t1510) */
663 set_git_work_tree(work_tree_env
);
664 else if (is_bare_repository_cfg
> 0) {
665 if (git_work_tree_cfg
) {
667 warning("core.bare and core.worktree do not make sense");
668 work_tree_config_is_bogus
= 1;
672 set_git_dir(gitdirenv
);
676 else if (git_work_tree_cfg
) { /* #6, #14 */
677 if (is_absolute_path(git_work_tree_cfg
))
678 set_git_work_tree(git_work_tree_cfg
);
681 if (chdir(gitdirenv
))
682 die_errno(_("cannot chdir to '%s'"), gitdirenv
);
683 if (chdir(git_work_tree_cfg
))
684 die_errno(_("cannot chdir to '%s'"), git_work_tree_cfg
);
685 core_worktree
= xgetcwd();
687 die_errno(_("cannot come back to cwd"));
688 set_git_work_tree(core_worktree
);
692 else if (!git_env_bool(GIT_IMPLICIT_WORK_TREE_ENVIRONMENT
, 1)) {
694 set_git_dir(gitdirenv
);
699 set_git_work_tree(".");
701 /* set_git_work_tree() must have been called by now */
702 worktree
= get_git_work_tree();
704 /* both get_git_work_tree() and cwd are already normalized */
705 if (!strcmp(cwd
->buf
, worktree
)) { /* cwd == worktree */
706 set_git_dir(gitdirenv
);
711 offset
= dir_inside_of(cwd
->buf
, worktree
);
712 if (offset
>= 0) { /* cwd inside worktree? */
713 set_git_dir(real_path(gitdirenv
));
715 die_errno(_("cannot chdir to '%s'"), worktree
);
716 strbuf_addch(cwd
, '/');
718 return cwd
->buf
+ offset
;
721 /* cwd outside worktree */
722 set_git_dir(gitdirenv
);
727 static const char *setup_discovered_git_dir(const char *gitdir
,
728 struct strbuf
*cwd
, int offset
,
729 struct repository_format
*repo_fmt
,
732 if (check_repository_format_gently(gitdir
, repo_fmt
, nongit_ok
))
735 /* --work-tree is set without --git-dir; use discovered one */
736 if (getenv(GIT_WORK_TREE_ENVIRONMENT
) || git_work_tree_cfg
) {
737 char *to_free
= NULL
;
740 if (offset
!= cwd
->len
&& !is_absolute_path(gitdir
))
741 gitdir
= to_free
= real_pathdup(gitdir
, 1);
743 die_errno(_("cannot come back to cwd"));
744 ret
= setup_explicit_git_dir(gitdir
, cwd
, repo_fmt
, nongit_ok
);
749 /* #16.2, #17.2, #20.2, #21.2, #24, #25, #28, #29 (see t1510) */
750 if (is_bare_repository_cfg
> 0) {
751 set_git_dir(offset
== cwd
->len
? gitdir
: real_path(gitdir
));
753 die_errno(_("cannot come back to cwd"));
757 /* #0, #1, #5, #8, #9, #12, #13 */
758 set_git_work_tree(".");
759 if (strcmp(gitdir
, DEFAULT_GIT_DIR_ENVIRONMENT
))
762 inside_work_tree
= 1;
763 if (offset
== cwd
->len
)
766 /* Make "offset" point past the '/' (already the case for root dirs) */
767 if (offset
!= offset_1st_component(cwd
->buf
))
769 /* Add a '/' at the end */
770 strbuf_addch(cwd
, '/');
771 return cwd
->buf
+ offset
;
774 /* #16.1, #17.1, #20.1, #21.1, #22.1 (see t1510) */
775 static const char *setup_bare_git_dir(struct strbuf
*cwd
, int offset
,
776 struct repository_format
*repo_fmt
,
781 if (check_repository_format_gently(".", repo_fmt
, nongit_ok
))
784 setenv(GIT_IMPLICIT_WORK_TREE_ENVIRONMENT
, "0", 1);
786 /* --work-tree is set without --git-dir; use discovered one */
787 if (getenv(GIT_WORK_TREE_ENVIRONMENT
) || git_work_tree_cfg
) {
788 static const char *gitdir
;
790 gitdir
= offset
== cwd
->len
? "." : xmemdupz(cwd
->buf
, offset
);
792 die_errno(_("cannot come back to cwd"));
793 return setup_explicit_git_dir(gitdir
, cwd
, repo_fmt
, nongit_ok
);
797 inside_work_tree
= 0;
798 if (offset
!= cwd
->len
) {
800 die_errno(_("cannot come back to cwd"));
801 root_len
= offset_1st_component(cwd
->buf
);
802 strbuf_setlen(cwd
, offset
> root_len
? offset
: root_len
);
803 set_git_dir(cwd
->buf
);
810 static const char *setup_nongit(const char *cwd
, int *nongit_ok
)
813 die(_("not a git repository (or any of the parent directories): %s"), DEFAULT_GIT_DIR_ENVIRONMENT
);
815 die_errno(_("cannot come back to cwd"));
820 static dev_t
get_device_or_die(const char *path
, const char *prefix
, int prefix_len
)
823 if (stat(path
, &buf
)) {
824 die_errno(_("failed to stat '%*s%s%s'"),
826 prefix
? prefix
: "",
827 prefix
? "/" : "", path
);
833 * A "string_list_each_func_t" function that canonicalizes an entry
834 * from GIT_CEILING_DIRECTORIES using real_path_if_valid(), or
835 * discards it if unusable. The presence of an empty entry in
836 * GIT_CEILING_DIRECTORIES turns off canonicalization for all
837 * subsequent entries.
839 static int canonicalize_ceiling_entry(struct string_list_item
*item
,
842 int *empty_entry_found
= cb_data
;
843 char *ceil
= item
->string
;
846 *empty_entry_found
= 1;
848 } else if (!is_absolute_path(ceil
)) {
850 } else if (*empty_entry_found
) {
851 /* Keep entry but do not canonicalize it */
854 char *real_path
= real_pathdup(ceil
, 0);
859 item
->string
= real_path
;
864 enum discovery_result
{
869 /* these are errors */
870 GIT_DIR_HIT_CEILING
= -1,
871 GIT_DIR_HIT_MOUNT_POINT
= -2,
872 GIT_DIR_INVALID_GITFILE
= -3
876 * We cannot decide in this function whether we are in the work tree or
877 * not, since the config can only be read _after_ this function was called.
879 * Also, we avoid changing any global state (such as the current working
880 * directory) to allow early callers.
882 * The directory where the search should start needs to be passed in via the
883 * `dir` parameter; upon return, the `dir` buffer will contain the path of
884 * the directory where the search ended, and `gitdir` will contain the path of
885 * the discovered .git/ directory, if any. If `gitdir` is not absolute, it
886 * is relative to `dir` (i.e. *not* necessarily the cwd).
888 static enum discovery_result
setup_git_directory_gently_1(struct strbuf
*dir
,
889 struct strbuf
*gitdir
,
892 const char *env_ceiling_dirs
= getenv(CEILING_DIRECTORIES_ENVIRONMENT
);
893 struct string_list ceiling_dirs
= STRING_LIST_INIT_DUP
;
894 const char *gitdirenv
;
895 int ceil_offset
= -1, min_offset
= has_dos_drive_prefix(dir
->buf
) ? 3 : 1;
896 dev_t current_device
= 0;
897 int one_filesystem
= 1;
900 * If GIT_DIR is set explicitly, we're not going
901 * to do any discovery, but we still do repository
904 gitdirenv
= getenv(GIT_DIR_ENVIRONMENT
);
906 strbuf_addstr(gitdir
, gitdirenv
);
907 return GIT_DIR_EXPLICIT
;
910 if (env_ceiling_dirs
) {
911 int empty_entry_found
= 0;
913 string_list_split(&ceiling_dirs
, env_ceiling_dirs
, PATH_SEP
, -1);
914 filter_string_list(&ceiling_dirs
, 0,
915 canonicalize_ceiling_entry
, &empty_entry_found
);
916 ceil_offset
= longest_ancestor_length(dir
->buf
, &ceiling_dirs
);
917 string_list_clear(&ceiling_dirs
, 0);
921 ceil_offset
= min_offset
- 2;
924 * Test in the following order (relative to the dir):
925 * - .git (file containing "gitdir: <path>")
934 one_filesystem
= !git_env_bool("GIT_DISCOVERY_ACROSS_FILESYSTEM", 0);
936 current_device
= get_device_or_die(dir
->buf
, NULL
, 0);
938 int offset
= dir
->len
, error_code
= 0;
940 if (offset
> min_offset
)
941 strbuf_addch(dir
, '/');
942 strbuf_addstr(dir
, DEFAULT_GIT_DIR_ENVIRONMENT
);
943 gitdirenv
= read_gitfile_gently(dir
->buf
, die_on_error
?
947 error_code
== READ_GITFILE_ERR_NOT_A_FILE
) {
948 /* NEEDSWORK: fail if .git is not file nor dir */
949 if (is_git_directory(dir
->buf
))
950 gitdirenv
= DEFAULT_GIT_DIR_ENVIRONMENT
;
951 } else if (error_code
!= READ_GITFILE_ERR_STAT_FAILED
)
952 return GIT_DIR_INVALID_GITFILE
;
954 strbuf_setlen(dir
, offset
);
956 strbuf_addstr(gitdir
, gitdirenv
);
957 return GIT_DIR_DISCOVERED
;
960 if (is_git_directory(dir
->buf
)) {
961 strbuf_addstr(gitdir
, ".");
965 if (offset
<= min_offset
)
966 return GIT_DIR_HIT_CEILING
;
968 while (--offset
> ceil_offset
&& !is_dir_sep(dir
->buf
[offset
]))
970 if (offset
<= ceil_offset
)
971 return GIT_DIR_HIT_CEILING
;
973 strbuf_setlen(dir
, offset
> min_offset
? offset
: min_offset
);
974 if (one_filesystem
&&
975 current_device
!= get_device_or_die(dir
->buf
, NULL
, offset
))
976 return GIT_DIR_HIT_MOUNT_POINT
;
980 int discover_git_directory(struct strbuf
*commondir
,
981 struct strbuf
*gitdir
)
983 struct strbuf dir
= STRBUF_INIT
, err
= STRBUF_INIT
;
984 size_t gitdir_offset
= gitdir
->len
, cwd_len
;
985 size_t commondir_offset
= commondir
->len
;
986 struct repository_format candidate
;
988 if (strbuf_getcwd(&dir
))
992 if (setup_git_directory_gently_1(&dir
, gitdir
, 0) <= 0) {
993 strbuf_release(&dir
);
998 * The returned gitdir is relative to dir, and if dir does not reflect
999 * the current working directory, we simply make the gitdir absolute.
1001 if (dir
.len
< cwd_len
&& !is_absolute_path(gitdir
->buf
+ gitdir_offset
)) {
1002 /* Avoid a trailing "/." */
1003 if (!strcmp(".", gitdir
->buf
+ gitdir_offset
))
1004 strbuf_setlen(gitdir
, gitdir_offset
);
1006 strbuf_addch(&dir
, '/');
1007 strbuf_insert(gitdir
, gitdir_offset
, dir
.buf
, dir
.len
);
1010 get_common_dir(commondir
, gitdir
->buf
+ gitdir_offset
);
1013 strbuf_addf(&dir
, "%s/config", commondir
->buf
+ commondir_offset
);
1014 read_repository_format(&candidate
, dir
.buf
);
1015 strbuf_release(&dir
);
1017 if (verify_repository_format(&candidate
, &err
) < 0) {
1018 warning("ignoring git dir '%s': %s",
1019 gitdir
->buf
+ gitdir_offset
, err
.buf
);
1020 strbuf_release(&err
);
1021 strbuf_setlen(commondir
, commondir_offset
);
1022 strbuf_setlen(gitdir
, gitdir_offset
);
1029 const char *setup_git_directory_gently(int *nongit_ok
)
1031 static struct strbuf cwd
= STRBUF_INIT
;
1032 struct strbuf dir
= STRBUF_INIT
, gitdir
= STRBUF_INIT
;
1034 struct repository_format repo_fmt
;
1037 * We may have read an incomplete configuration before
1038 * setting-up the git directory. If so, clear the cache so
1039 * that the next queries to the configuration reload complete
1040 * configuration (including the per-repo config file that we
1041 * ignored previously).
1046 * Let's assume that we are in a git repository.
1047 * If it turns out later that we are somewhere else, the value will be
1048 * updated accordingly.
1053 if (strbuf_getcwd(&cwd
))
1054 die_errno(_("Unable to read current working directory"));
1055 strbuf_addbuf(&dir
, &cwd
);
1057 switch (setup_git_directory_gently_1(&dir
, &gitdir
, 1)) {
1061 case GIT_DIR_EXPLICIT
:
1062 prefix
= setup_explicit_git_dir(gitdir
.buf
, &cwd
, &repo_fmt
, nongit_ok
);
1064 case GIT_DIR_DISCOVERED
:
1065 if (dir
.len
< cwd
.len
&& chdir(dir
.buf
))
1066 die(_("cannot change to '%s'"), dir
.buf
);
1067 prefix
= setup_discovered_git_dir(gitdir
.buf
, &cwd
, dir
.len
,
1068 &repo_fmt
, nongit_ok
);
1071 if (dir
.len
< cwd
.len
&& chdir(dir
.buf
))
1072 die(_("cannot change to '%s'"), dir
.buf
);
1073 prefix
= setup_bare_git_dir(&cwd
, dir
.len
, &repo_fmt
, nongit_ok
);
1075 case GIT_DIR_HIT_CEILING
:
1076 prefix
= setup_nongit(cwd
.buf
, nongit_ok
);
1078 case GIT_DIR_HIT_MOUNT_POINT
:
1081 strbuf_release(&cwd
);
1082 strbuf_release(&dir
);
1085 die(_("not a git repository (or any parent up to mount point %s)\n"
1086 "Stopping at filesystem boundary (GIT_DISCOVERY_ACROSS_FILESYSTEM not set)."),
1089 BUG("unhandled setup_git_directory_1() result");
1093 setenv(GIT_PREFIX_ENVIRONMENT
, prefix
, 1);
1095 setenv(GIT_PREFIX_ENVIRONMENT
, "", 1);
1097 startup_info
->have_repository
= !nongit_ok
|| !*nongit_ok
;
1098 startup_info
->prefix
= prefix
;
1101 * Not all paths through the setup code will call 'set_git_dir()' (which
1102 * directly sets up the environment) so in order to guarantee that the
1103 * environment is in a consistent state after setup, explicitly setup
1104 * the environment if we have a repository.
1106 * NEEDSWORK: currently we allow bogus GIT_DIR values to be set in some
1107 * code paths so we also need to explicitly setup the environment if
1108 * the user has set GIT_DIR. It may be beneficial to disallow bogus
1109 * GIT_DIR values at some point in the future.
1111 if (startup_info
->have_repository
|| getenv(GIT_DIR_ENVIRONMENT
)) {
1112 if (!the_repository
->gitdir
) {
1113 const char *gitdir
= getenv(GIT_DIR_ENVIRONMENT
);
1115 gitdir
= DEFAULT_GIT_DIR_ENVIRONMENT
;
1116 setup_git_env(gitdir
);
1118 if (startup_info
->have_repository
)
1119 repo_set_hash_algo(the_repository
, repo_fmt
.hash_algo
);
1122 strbuf_release(&dir
);
1123 strbuf_release(&gitdir
);
1128 int git_config_perm(const char *var
, const char *value
)
1136 if (!strcmp(value
, "umask"))
1138 if (!strcmp(value
, "group"))
1140 if (!strcmp(value
, "all") ||
1141 !strcmp(value
, "world") ||
1142 !strcmp(value
, "everybody"))
1143 return PERM_EVERYBODY
;
1145 /* Parse octal numbers */
1146 i
= strtol(value
, &endptr
, 8);
1148 /* If not an octal number, maybe true/false? */
1150 return git_config_bool(var
, value
) ? PERM_GROUP
: PERM_UMASK
;
1153 * Treat values 0, 1 and 2 as compatibility cases, otherwise it is
1154 * a chmod value to restrict to.
1157 case PERM_UMASK
: /* 0 */
1159 case OLD_PERM_GROUP
: /* 1 */
1161 case OLD_PERM_EVERYBODY
: /* 2 */
1162 return PERM_EVERYBODY
;
1165 /* A filemode value was given: 0xxx */
1167 if ((i
& 0600) != 0600)
1168 die(_("problem with core.sharedRepository filemode value "
1169 "(0%.3o).\nThe owner of files must always have "
1170 "read and write permissions."), i
);
1173 * Mask filemode value. Others can not get write permission.
1174 * x flags for directories are handled separately.
1179 void check_repository_format(void)
1181 struct repository_format repo_fmt
;
1182 check_repository_format_gently(get_git_dir(), &repo_fmt
, NULL
);
1183 startup_info
->have_repository
= 1;
1187 * Returns the "prefix", a path to the current working directory
1188 * relative to the work tree root, or NULL, if the current working
1189 * directory is not a strict subdirectory of the work tree root. The
1190 * prefix always ends with a '/' character.
1192 const char *setup_git_directory(void)
1194 return setup_git_directory_gently(NULL
);
1197 const char *resolve_gitdir_gently(const char *suspect
, int *return_error_code
)
1199 if (is_git_directory(suspect
))
1201 return read_gitfile_gently(suspect
, return_error_code
);
1204 /* if any standard file descriptor is missing open it to /dev/null */
1205 void sanitize_stdfds(void)
1207 int fd
= open("/dev/null", O_RDWR
, 0);
1208 while (fd
!= -1 && fd
< 2)
1211 die_errno(_("open /dev/null or dup failed"));
1218 #ifdef NO_POSIX_GOODIES
1226 die_errno(_("fork failed"));
1231 die_errno(_("setsid failed"));