1 #include "git-compat-util.h"
4 #include "environment.h"
7 #include "object-name.h"
9 #include "repository.h"
13 #include "string-list.h"
14 #include "chdir-notify.h"
16 #include "promisor-remote.h"
22 static int inside_git_dir
= -1;
23 static int inside_work_tree
= -1;
24 static int work_tree_config_is_bogus
;
25 enum allowed_bare_repo
{
26 ALLOWED_BARE_REPO_EXPLICIT
= 0,
27 ALLOWED_BARE_REPO_ALL
,
30 static struct startup_info the_startup_info
;
31 struct startup_info
*startup_info
= &the_startup_info
;
32 const char *tmp_original_cwd
;
35 * The input parameter must contain an absolute path, and it must already be
38 * Find the part of an absolute path that lies inside the work tree by
39 * dereferencing symlinks outside the work tree, for example:
40 * /dir1/repo/dir2/file (work tree is /dir1/repo) -> dir2/file
41 * /dir/file (work tree is /) -> dir/file
42 * /dir/symlink1/symlink2 (symlink1 points to work tree) -> symlink2
43 * /dir/repolink/file (repolink points to /dir/repo) -> file
44 * /dir/repo (exactly equal to work tree) -> (empty string)
46 static int abspath_part_inside_repo(char *path
)
52 const char *work_tree
= get_git_work_tree();
53 struct strbuf realpath
= STRBUF_INIT
;
57 wtlen
= strlen(work_tree
);
59 off
= offset_1st_component(path
);
61 /* check if work tree is already the prefix */
62 if (wtlen
<= len
&& !fspathncmp(path
, work_tree
, wtlen
)) {
63 if (path
[wtlen
] == '/') {
64 memmove(path
, path
+ wtlen
+ 1, len
- wtlen
);
66 } else if (path
[wtlen
- 1] == '/' || path
[wtlen
] == '\0') {
67 /* work tree is the root, or the whole path */
68 memmove(path
, path
+ wtlen
, len
- wtlen
+ 1);
71 /* work tree might match beginning of a symlink to work tree */
77 /* check each '/'-terminated level */
82 strbuf_realpath(&realpath
, path0
, 1);
83 if (fspathcmp(realpath
.buf
, work_tree
) == 0) {
84 memmove(path0
, path
+ 1, len
- (path
- path0
));
85 strbuf_release(&realpath
);
92 /* check whole path */
93 strbuf_realpath(&realpath
, path0
, 1);
94 if (fspathcmp(realpath
.buf
, work_tree
) == 0) {
96 strbuf_release(&realpath
);
100 strbuf_release(&realpath
);
105 * Normalize "path", prepending the "prefix" for relative paths. If
106 * remaining_prefix is not NULL, return the actual prefix still
107 * remains in the path. For example, prefix = sub1/sub2/ and path is
109 * foo -> sub1/sub2/foo (full prefix)
110 * ../foo -> sub1/foo (remaining prefix is sub1/)
111 * ../../bar -> bar (no remaining prefix)
112 * ../../sub1/sub2/foo -> sub1/sub2/foo (but no remaining prefix)
113 * `pwd`/../bar -> sub1/bar (no remaining prefix)
115 char *prefix_path_gently(const char *prefix
, int len
,
116 int *remaining_prefix
, const char *path
)
118 const char *orig
= path
;
120 if (is_absolute_path(orig
)) {
121 sanitized
= xmallocz(strlen(path
));
122 if (remaining_prefix
)
123 *remaining_prefix
= 0;
124 if (normalize_path_copy_len(sanitized
, path
, remaining_prefix
)) {
128 if (abspath_part_inside_repo(sanitized
)) {
133 sanitized
= xstrfmt("%.*s%s", len
, len
? prefix
: "", path
);
134 if (remaining_prefix
)
135 *remaining_prefix
= len
;
136 if (normalize_path_copy_len(sanitized
, sanitized
, remaining_prefix
)) {
144 char *prefix_path(const char *prefix
, int len
, const char *path
)
146 char *r
= prefix_path_gently(prefix
, len
, NULL
, path
);
148 const char *hint_path
= get_git_work_tree();
150 hint_path
= get_git_dir();
151 die(_("'%s' is outside repository at '%s'"), path
,
152 absolute_path(hint_path
));
157 int path_inside_repo(const char *prefix
, const char *path
)
159 int len
= prefix
? strlen(prefix
) : 0;
160 char *r
= prefix_path_gently(prefix
, len
, NULL
, path
);
168 int check_filename(const char *prefix
, const char *arg
)
170 char *to_free
= NULL
;
173 if (skip_prefix(arg
, ":/", &arg
)) {
174 if (!*arg
) /* ":/" is root dir, always exists */
177 } else if (skip_prefix(arg
, ":!", &arg
) ||
178 skip_prefix(arg
, ":^", &arg
)) {
179 if (!*arg
) /* excluding everything is silly, but allowed */
184 arg
= to_free
= prefix_filename(prefix
, arg
);
186 if (!lstat(arg
, &st
)) {
188 return 1; /* file exists */
190 if (is_missing_file_error(errno
)) {
192 return 0; /* file does not exist */
194 die_errno(_("failed to stat '%s'"), arg
);
197 static void NORETURN
die_verify_filename(struct repository
*r
,
200 int diagnose_misspelt_rev
)
202 if (!diagnose_misspelt_rev
)
203 die(_("%s: no such path in the working tree.\n"
204 "Use 'git <command> -- <path>...' to specify paths that do not exist locally."),
207 * Saying "'(icase)foo' does not exist in the index" when the
208 * user gave us ":(icase)foo" is just stupid. A magic pathspec
209 * begins with a colon and is followed by a non-alnum; do not
210 * let maybe_die_on_misspelt_object_name() even trigger.
212 if (!(arg
[0] == ':' && !isalnum(arg
[1])))
213 maybe_die_on_misspelt_object_name(r
, arg
, prefix
);
215 /* ... or fall back the most general message. */
216 die(_("ambiguous argument '%s': unknown revision or path not in the working tree.\n"
217 "Use '--' to separate paths from revisions, like this:\n"
218 "'git <command> [<revision>...] -- [<file>...]'"), arg
);
223 * Check for arguments that don't resolve as actual files,
224 * but which look sufficiently like pathspecs that we'll consider
225 * them such for the purposes of rev/pathspec DWIM parsing.
227 static int looks_like_pathspec(const char *arg
)
233 * Wildcard characters imply the user is looking to match pathspecs
234 * that aren't in the filesystem. Note that this doesn't include
235 * backslash even though it's a glob special; by itself it doesn't
236 * cause any increase in the match. Likewise ignore backslash-escaped
237 * wildcard characters.
239 for (p
= arg
; *p
; p
++) {
242 } else if (is_glob_special(*p
)) {
250 /* long-form pathspec magic */
251 if (starts_with(arg
, ":("))
258 * Verify a filename that we got as an argument for a pathspec
259 * entry. Note that a filename that begins with "-" never verifies
260 * as true, because even if such a filename were to exist, we want
261 * it to be preceded by the "--" marker (or we want the user to
262 * use a format like "./-filename")
264 * The "diagnose_misspelt_rev" is used to provide a user-friendly
265 * diagnosis when dying upon finding that "name" is not a pathname.
266 * If set to 1, the diagnosis will try to diagnose "name" as an
267 * invalid object name (e.g. HEAD:foo). If set to 0, the diagnosis
268 * will only complain about an inexisting file.
270 * This function is typically called to check that a "file or rev"
271 * argument is unambiguous. In this case, the caller will want
272 * diagnose_misspelt_rev == 1 when verifying the first non-rev
273 * argument (which could have been a revision), and
274 * diagnose_misspelt_rev == 0 for the next ones (because we already
275 * saw a filename, there's not ambiguity anymore).
277 void verify_filename(const char *prefix
,
279 int diagnose_misspelt_rev
)
282 die(_("option '%s' must come before non-option arguments"), arg
);
283 if (looks_like_pathspec(arg
) || check_filename(prefix
, arg
))
285 die_verify_filename(the_repository
, prefix
, arg
, diagnose_misspelt_rev
);
289 * Opposite of the above: the command line did not have -- marker
290 * and we parsed the arg as a refname. It should not be interpretable
293 void verify_non_filename(const char *prefix
, const char *arg
)
295 if (!is_inside_work_tree() || is_inside_git_dir())
299 if (!check_filename(prefix
, arg
))
301 die(_("ambiguous argument '%s': both revision and filename\n"
302 "Use '--' to separate paths from revisions, like this:\n"
303 "'git <command> [<revision>...] -- [<file>...]'"), arg
);
306 int get_common_dir(struct strbuf
*sb
, const char *gitdir
)
308 const char *git_env_common_dir
= getenv(GIT_COMMON_DIR_ENVIRONMENT
);
309 if (git_env_common_dir
) {
310 strbuf_addstr(sb
, git_env_common_dir
);
313 return get_common_dir_noenv(sb
, gitdir
);
317 int get_common_dir_noenv(struct strbuf
*sb
, const char *gitdir
)
319 struct strbuf data
= STRBUF_INIT
;
320 struct strbuf path
= STRBUF_INIT
;
323 strbuf_addf(&path
, "%s/commondir", gitdir
);
324 if (file_exists(path
.buf
)) {
325 if (strbuf_read_file(&data
, path
.buf
, 0) <= 0)
326 die_errno(_("failed to read %s"), path
.buf
);
327 while (data
.len
&& (data
.buf
[data
.len
- 1] == '\n' ||
328 data
.buf
[data
.len
- 1] == '\r'))
330 data
.buf
[data
.len
] = '\0';
332 if (!is_absolute_path(data
.buf
))
333 strbuf_addf(&path
, "%s/", gitdir
);
334 strbuf_addbuf(&path
, &data
);
335 strbuf_add_real_path(sb
, path
.buf
);
338 strbuf_addstr(sb
, gitdir
);
341 strbuf_release(&data
);
342 strbuf_release(&path
);
347 * Test if it looks like we're at a git directory.
350 * - either an objects/ directory _or_ the proper
351 * GIT_OBJECT_DIRECTORY environment variable
352 * - a refs/ directory
353 * - either a HEAD symlink or a HEAD file that is formatted as
354 * a proper "ref:", or a regular file HEAD that has a properly
355 * formatted sha1 object name.
357 int is_git_directory(const char *suspect
)
359 struct strbuf path
= STRBUF_INIT
;
363 /* Check worktree-related signatures */
364 strbuf_addstr(&path
, suspect
);
365 strbuf_complete(&path
, '/');
366 strbuf_addstr(&path
, "HEAD");
367 if (validate_headref(path
.buf
))
371 get_common_dir(&path
, suspect
);
374 /* Check non-worktree-related signatures */
375 if (getenv(DB_ENVIRONMENT
)) {
376 if (access(getenv(DB_ENVIRONMENT
), X_OK
))
380 strbuf_setlen(&path
, len
);
381 strbuf_addstr(&path
, "/objects");
382 if (access(path
.buf
, X_OK
))
386 strbuf_setlen(&path
, len
);
387 strbuf_addstr(&path
, "/refs");
388 if (access(path
.buf
, X_OK
))
393 strbuf_release(&path
);
397 int is_nonbare_repository_dir(struct strbuf
*path
)
401 size_t orig_path_len
= path
->len
;
402 assert(orig_path_len
!= 0);
403 strbuf_complete(path
, '/');
404 strbuf_addstr(path
, ".git");
405 if (read_gitfile_gently(path
->buf
, &gitfile_error
) || is_git_directory(path
->buf
))
407 if (gitfile_error
== READ_GITFILE_ERR_OPEN_FAILED
||
408 gitfile_error
== READ_GITFILE_ERR_READ_FAILED
)
410 strbuf_setlen(path
, orig_path_len
);
414 int is_inside_git_dir(void)
416 if (inside_git_dir
< 0)
417 inside_git_dir
= is_inside_dir(get_git_dir());
418 return inside_git_dir
;
421 int is_inside_work_tree(void)
423 if (inside_work_tree
< 0)
424 inside_work_tree
= is_inside_dir(get_git_work_tree());
425 return inside_work_tree
;
428 void setup_work_tree(void)
430 const char *work_tree
;
431 static int initialized
= 0;
436 if (work_tree_config_is_bogus
)
437 die(_("unable to set up work tree using invalid config"));
439 work_tree
= get_git_work_tree();
440 if (!work_tree
|| chdir_notify(work_tree
))
441 die(_("this operation must be run in a work tree"));
444 * Make sure subsequent git processes find correct worktree
445 * if $GIT_WORK_TREE is set relative
447 if (getenv(GIT_WORK_TREE_ENVIRONMENT
))
448 setenv(GIT_WORK_TREE_ENVIRONMENT
, ".", 1);
453 static void setup_original_cwd(void)
455 struct strbuf tmp
= STRBUF_INIT
;
456 const char *worktree
= NULL
;
459 if (!tmp_original_cwd
)
463 * startup_info->original_cwd points to the current working
464 * directory we inherited from our parent process, which is a
465 * directory we want to avoid removing.
467 * For convience, we would like to have the path relative to the
468 * worktree instead of an absolute path.
470 * Yes, startup_info->original_cwd is usually the same as 'prefix',
471 * but differs in two ways:
472 * - prefix has a trailing '/'
473 * - if the user passes '-C' to git, that modifies the prefix but
474 * not startup_info->original_cwd.
477 /* Normalize the directory */
478 if (!strbuf_realpath(&tmp
, tmp_original_cwd
, 0)) {
479 trace2_data_string("setup", the_repository
,
480 "realpath-path", tmp_original_cwd
);
481 trace2_data_string("setup", the_repository
,
482 "realpath-failure", strerror(errno
));
483 free((char*)tmp_original_cwd
);
484 tmp_original_cwd
= NULL
;
488 free((char*)tmp_original_cwd
);
489 tmp_original_cwd
= NULL
;
490 startup_info
->original_cwd
= strbuf_detach(&tmp
, NULL
);
493 * Get our worktree; we only protect the current working directory
494 * if it's in the worktree.
496 worktree
= get_git_work_tree();
498 goto no_prevention_needed
;
500 offset
= dir_inside_of(startup_info
->original_cwd
, worktree
);
503 * If startup_info->original_cwd == worktree, that is already
504 * protected and we don't need original_cwd as a secondary
505 * protection measure.
507 if (!*(startup_info
->original_cwd
+ offset
))
508 goto no_prevention_needed
;
511 * original_cwd was inside worktree; precompose it just as
512 * we do prefix so that built up paths will match
514 startup_info
->original_cwd
= \
515 precompose_string_if_needed(startup_info
->original_cwd
520 no_prevention_needed
:
521 free((char*)startup_info
->original_cwd
);
522 startup_info
->original_cwd
= NULL
;
525 static int read_worktree_config(const char *var
, const char *value
, void *vdata
)
527 struct repository_format
*data
= vdata
;
529 if (strcmp(var
, "core.bare") == 0) {
530 data
->is_bare
= git_config_bool(var
, value
);
531 } else if (strcmp(var
, "core.worktree") == 0) {
533 return config_error_nonbool(var
);
534 free(data
->work_tree
);
535 data
->work_tree
= xstrdup(value
);
540 enum extension_result
{
541 EXTENSION_ERROR
= -1, /* compatible with error(), etc */
542 EXTENSION_UNKNOWN
= 0,
547 * Do not add new extensions to this function. It handles extensions which are
548 * respected even in v0-format repositories for historical compatibility.
550 static enum extension_result
handle_extension_v0(const char *var
,
553 struct repository_format
*data
)
555 if (!strcmp(ext
, "noop")) {
557 } else if (!strcmp(ext
, "preciousobjects")) {
558 data
->precious_objects
= git_config_bool(var
, value
);
560 } else if (!strcmp(ext
, "partialclone")) {
561 data
->partial_clone
= xstrdup(value
);
563 } else if (!strcmp(ext
, "worktreeconfig")) {
564 data
->worktree_config
= git_config_bool(var
, value
);
568 return EXTENSION_UNKNOWN
;
572 * Record any new extensions in this function.
574 static enum extension_result
handle_extension(const char *var
,
577 struct repository_format
*data
)
579 if (!strcmp(ext
, "noop-v1")) {
581 } else if (!strcmp(ext
, "objectformat")) {
585 return config_error_nonbool(var
);
586 format
= hash_algo_by_name(value
);
587 if (format
== GIT_HASH_UNKNOWN
)
588 return error(_("invalid value for '%s': '%s'"),
589 "extensions.objectformat", value
);
590 data
->hash_algo
= format
;
593 return EXTENSION_UNKNOWN
;
596 static int check_repo_format(const char *var
, const char *value
, void *vdata
)
598 struct repository_format
*data
= vdata
;
601 if (strcmp(var
, "core.repositoryformatversion") == 0)
602 data
->version
= git_config_int(var
, value
);
603 else if (skip_prefix(var
, "extensions.", &ext
)) {
604 switch (handle_extension_v0(var
, value
, ext
, data
)) {
605 case EXTENSION_ERROR
:
609 case EXTENSION_UNKNOWN
:
613 switch (handle_extension(var
, value
, ext
, data
)) {
614 case EXTENSION_ERROR
:
617 string_list_append(&data
->v1_only_extensions
, ext
);
619 case EXTENSION_UNKNOWN
:
620 string_list_append(&data
->unknown_extensions
, ext
);
625 return read_worktree_config(var
, value
, vdata
);
628 static int check_repository_format_gently(const char *gitdir
, struct repository_format
*candidate
, int *nongit_ok
)
630 struct strbuf sb
= STRBUF_INIT
;
631 struct strbuf err
= STRBUF_INIT
;
634 has_common
= get_common_dir(&sb
, gitdir
);
635 strbuf_addstr(&sb
, "/config");
636 read_repository_format(candidate
, sb
.buf
);
640 * For historical use of check_repository_format() in git-init,
641 * we treat a missing config as a silent "ok", even when nongit_ok
644 if (candidate
->version
< 0)
647 if (verify_repository_format(candidate
, &err
) < 0) {
649 warning("%s", err
.buf
);
650 strbuf_release(&err
);
657 repository_format_precious_objects
= candidate
->precious_objects
;
658 string_list_clear(&candidate
->unknown_extensions
, 0);
659 string_list_clear(&candidate
->v1_only_extensions
, 0);
661 if (candidate
->worktree_config
) {
663 * pick up core.bare and core.worktree from per-worktree
666 strbuf_addf(&sb
, "%s/config.worktree", gitdir
);
667 git_config_from_file(read_worktree_config
, sb
.buf
, candidate
);
673 if (candidate
->is_bare
!= -1) {
674 is_bare_repository_cfg
= candidate
->is_bare
;
675 if (is_bare_repository_cfg
== 1)
676 inside_work_tree
= -1;
678 if (candidate
->work_tree
) {
679 free(git_work_tree_cfg
);
680 git_work_tree_cfg
= xstrdup(candidate
->work_tree
);
681 inside_work_tree
= -1;
688 int upgrade_repository_format(int target_version
)
690 struct strbuf sb
= STRBUF_INIT
;
691 struct strbuf err
= STRBUF_INIT
;
692 struct strbuf repo_version
= STRBUF_INIT
;
693 struct repository_format repo_fmt
= REPOSITORY_FORMAT_INIT
;
695 strbuf_git_common_path(&sb
, the_repository
, "config");
696 read_repository_format(&repo_fmt
, sb
.buf
);
699 if (repo_fmt
.version
>= target_version
)
702 if (verify_repository_format(&repo_fmt
, &err
) < 0) {
703 error("cannot upgrade repository format from %d to %d: %s",
704 repo_fmt
.version
, target_version
, err
.buf
);
705 strbuf_release(&err
);
708 if (!repo_fmt
.version
&& repo_fmt
.unknown_extensions
.nr
)
709 return error("cannot upgrade repository format: "
710 "unknown extension %s",
711 repo_fmt
.unknown_extensions
.items
[0].string
);
713 strbuf_addf(&repo_version
, "%d", target_version
);
714 git_config_set("core.repositoryformatversion", repo_version
.buf
);
715 strbuf_release(&repo_version
);
719 static void init_repository_format(struct repository_format
*format
)
721 const struct repository_format fresh
= REPOSITORY_FORMAT_INIT
;
723 memcpy(format
, &fresh
, sizeof(fresh
));
726 int read_repository_format(struct repository_format
*format
, const char *path
)
728 clear_repository_format(format
);
729 git_config_from_file(check_repo_format
, path
, format
);
730 if (format
->version
== -1)
731 clear_repository_format(format
);
732 return format
->version
;
735 void clear_repository_format(struct repository_format
*format
)
737 string_list_clear(&format
->unknown_extensions
, 0);
738 string_list_clear(&format
->v1_only_extensions
, 0);
739 free(format
->work_tree
);
740 free(format
->partial_clone
);
741 init_repository_format(format
);
744 int verify_repository_format(const struct repository_format
*format
,
747 if (GIT_REPO_VERSION_READ
< format
->version
) {
748 strbuf_addf(err
, _("Expected git repo version <= %d, found %d"),
749 GIT_REPO_VERSION_READ
, format
->version
);
753 if (format
->version
>= 1 && format
->unknown_extensions
.nr
) {
756 strbuf_addstr(err
, Q_("unknown repository extension found:",
757 "unknown repository extensions found:",
758 format
->unknown_extensions
.nr
));
760 for (i
= 0; i
< format
->unknown_extensions
.nr
; i
++)
761 strbuf_addf(err
, "\n\t%s",
762 format
->unknown_extensions
.items
[i
].string
);
766 if (format
->version
== 0 && format
->v1_only_extensions
.nr
) {
770 Q_("repo version is 0, but v1-only extension found:",
771 "repo version is 0, but v1-only extensions found:",
772 format
->v1_only_extensions
.nr
));
774 for (i
= 0; i
< format
->v1_only_extensions
.nr
; i
++)
775 strbuf_addf(err
, "\n\t%s",
776 format
->v1_only_extensions
.items
[i
].string
);
783 void read_gitfile_error_die(int error_code
, const char *path
, const char *dir
)
785 switch (error_code
) {
786 case READ_GITFILE_ERR_STAT_FAILED
:
787 case READ_GITFILE_ERR_NOT_A_FILE
:
788 /* non-fatal; follow return path */
790 case READ_GITFILE_ERR_OPEN_FAILED
:
791 die_errno(_("error opening '%s'"), path
);
792 case READ_GITFILE_ERR_TOO_LARGE
:
793 die(_("too large to be a .git file: '%s'"), path
);
794 case READ_GITFILE_ERR_READ_FAILED
:
795 die(_("error reading %s"), path
);
796 case READ_GITFILE_ERR_INVALID_FORMAT
:
797 die(_("invalid gitfile format: %s"), path
);
798 case READ_GITFILE_ERR_NO_PATH
:
799 die(_("no path in gitfile: %s"), path
);
800 case READ_GITFILE_ERR_NOT_A_REPO
:
801 die(_("not a git repository: %s"), dir
);
803 BUG("unknown error code");
808 * Try to read the location of the git directory from the .git file,
809 * return path to git directory if found. The return value comes from
812 * On failure, if return_error_code is not NULL, return_error_code
813 * will be set to an error code and NULL will be returned. If
814 * return_error_code is NULL the function will die instead (for most
817 const char *read_gitfile_gently(const char *path
, int *return_error_code
)
819 const int max_file_size
= 1 << 20; /* 1MB */
827 static struct strbuf realpath
= STRBUF_INIT
;
829 if (stat(path
, &st
)) {
830 /* NEEDSWORK: discern between ENOENT vs other errors */
831 error_code
= READ_GITFILE_ERR_STAT_FAILED
;
834 if (!S_ISREG(st
.st_mode
)) {
835 error_code
= READ_GITFILE_ERR_NOT_A_FILE
;
838 if (st
.st_size
> max_file_size
) {
839 error_code
= READ_GITFILE_ERR_TOO_LARGE
;
842 fd
= open(path
, O_RDONLY
);
844 error_code
= READ_GITFILE_ERR_OPEN_FAILED
;
847 buf
= xmallocz(st
.st_size
);
848 len
= read_in_full(fd
, buf
, st
.st_size
);
850 if (len
!= st
.st_size
) {
851 error_code
= READ_GITFILE_ERR_READ_FAILED
;
854 if (!starts_with(buf
, "gitdir: ")) {
855 error_code
= READ_GITFILE_ERR_INVALID_FORMAT
;
858 while (buf
[len
- 1] == '\n' || buf
[len
- 1] == '\r')
861 error_code
= READ_GITFILE_ERR_NO_PATH
;
867 if (!is_absolute_path(dir
) && (slash
= strrchr(path
, '/'))) {
868 size_t pathlen
= slash
+1 - path
;
869 dir
= xstrfmt("%.*s%.*s", (int)pathlen
, path
,
870 (int)(len
- 8), buf
+ 8);
874 if (!is_git_directory(dir
)) {
875 error_code
= READ_GITFILE_ERR_NOT_A_REPO
;
879 strbuf_realpath(&realpath
, dir
, 1);
883 if (return_error_code
)
884 *return_error_code
= error_code
;
886 read_gitfile_error_die(error_code
, path
, dir
);
889 return error_code
? NULL
: path
;
892 static const char *setup_explicit_git_dir(const char *gitdirenv
,
894 struct repository_format
*repo_fmt
,
897 const char *work_tree_env
= getenv(GIT_WORK_TREE_ENVIRONMENT
);
898 const char *worktree
;
902 if (PATH_MAX
- 40 < strlen(gitdirenv
))
903 die(_("'$%s' too big"), GIT_DIR_ENVIRONMENT
);
905 gitfile
= (char*)read_gitfile(gitdirenv
);
907 gitfile
= xstrdup(gitfile
);
911 if (!is_git_directory(gitdirenv
)) {
917 die(_("not a git repository: '%s'"), gitdirenv
);
920 if (check_repository_format_gently(gitdirenv
, repo_fmt
, nongit_ok
)) {
925 /* #3, #7, #11, #15, #19, #23, #27, #31 (see t1510) */
927 set_git_work_tree(work_tree_env
);
928 else if (is_bare_repository_cfg
> 0) {
929 if (git_work_tree_cfg
) {
931 warning("core.bare and core.worktree do not make sense");
932 work_tree_config_is_bogus
= 1;
936 set_git_dir(gitdirenv
, 0);
940 else if (git_work_tree_cfg
) { /* #6, #14 */
941 if (is_absolute_path(git_work_tree_cfg
))
942 set_git_work_tree(git_work_tree_cfg
);
945 if (chdir(gitdirenv
))
946 die_errno(_("cannot chdir to '%s'"), gitdirenv
);
947 if (chdir(git_work_tree_cfg
))
948 die_errno(_("cannot chdir to '%s'"), git_work_tree_cfg
);
949 core_worktree
= xgetcwd();
951 die_errno(_("cannot come back to cwd"));
952 set_git_work_tree(core_worktree
);
956 else if (!git_env_bool(GIT_IMPLICIT_WORK_TREE_ENVIRONMENT
, 1)) {
958 set_git_dir(gitdirenv
, 0);
963 set_git_work_tree(".");
965 /* set_git_work_tree() must have been called by now */
966 worktree
= get_git_work_tree();
968 /* both get_git_work_tree() and cwd are already normalized */
969 if (!strcmp(cwd
->buf
, worktree
)) { /* cwd == worktree */
970 set_git_dir(gitdirenv
, 0);
975 offset
= dir_inside_of(cwd
->buf
, worktree
);
976 if (offset
>= 0) { /* cwd inside worktree? */
977 set_git_dir(gitdirenv
, 1);
979 die_errno(_("cannot chdir to '%s'"), worktree
);
980 strbuf_addch(cwd
, '/');
982 return cwd
->buf
+ offset
;
985 /* cwd outside worktree */
986 set_git_dir(gitdirenv
, 0);
991 static const char *setup_discovered_git_dir(const char *gitdir
,
992 struct strbuf
*cwd
, int offset
,
993 struct repository_format
*repo_fmt
,
996 if (check_repository_format_gently(gitdir
, repo_fmt
, nongit_ok
))
999 /* --work-tree is set without --git-dir; use discovered one */
1000 if (getenv(GIT_WORK_TREE_ENVIRONMENT
) || git_work_tree_cfg
) {
1001 char *to_free
= NULL
;
1004 if (offset
!= cwd
->len
&& !is_absolute_path(gitdir
))
1005 gitdir
= to_free
= real_pathdup(gitdir
, 1);
1006 if (chdir(cwd
->buf
))
1007 die_errno(_("cannot come back to cwd"));
1008 ret
= setup_explicit_git_dir(gitdir
, cwd
, repo_fmt
, nongit_ok
);
1013 /* #16.2, #17.2, #20.2, #21.2, #24, #25, #28, #29 (see t1510) */
1014 if (is_bare_repository_cfg
> 0) {
1015 set_git_dir(gitdir
, (offset
!= cwd
->len
));
1016 if (chdir(cwd
->buf
))
1017 die_errno(_("cannot come back to cwd"));
1021 /* #0, #1, #5, #8, #9, #12, #13 */
1022 set_git_work_tree(".");
1023 if (strcmp(gitdir
, DEFAULT_GIT_DIR_ENVIRONMENT
))
1024 set_git_dir(gitdir
, 0);
1026 inside_work_tree
= 1;
1027 if (offset
>= cwd
->len
)
1030 /* Make "offset" point past the '/' (already the case for root dirs) */
1031 if (offset
!= offset_1st_component(cwd
->buf
))
1033 /* Add a '/' at the end */
1034 strbuf_addch(cwd
, '/');
1035 return cwd
->buf
+ offset
;
1038 /* #16.1, #17.1, #20.1, #21.1, #22.1 (see t1510) */
1039 static const char *setup_bare_git_dir(struct strbuf
*cwd
, int offset
,
1040 struct repository_format
*repo_fmt
,
1045 if (check_repository_format_gently(".", repo_fmt
, nongit_ok
))
1048 setenv(GIT_IMPLICIT_WORK_TREE_ENVIRONMENT
, "0", 1);
1050 /* --work-tree is set without --git-dir; use discovered one */
1051 if (getenv(GIT_WORK_TREE_ENVIRONMENT
) || git_work_tree_cfg
) {
1052 static const char *gitdir
;
1054 gitdir
= offset
== cwd
->len
? "." : xmemdupz(cwd
->buf
, offset
);
1055 if (chdir(cwd
->buf
))
1056 die_errno(_("cannot come back to cwd"));
1057 return setup_explicit_git_dir(gitdir
, cwd
, repo_fmt
, nongit_ok
);
1061 inside_work_tree
= 0;
1062 if (offset
!= cwd
->len
) {
1063 if (chdir(cwd
->buf
))
1064 die_errno(_("cannot come back to cwd"));
1065 root_len
= offset_1st_component(cwd
->buf
);
1066 strbuf_setlen(cwd
, offset
> root_len
? offset
: root_len
);
1067 set_git_dir(cwd
->buf
, 0);
1070 set_git_dir(".", 0);
1074 static dev_t
get_device_or_die(const char *path
, const char *prefix
, int prefix_len
)
1077 if (stat(path
, &buf
)) {
1078 die_errno(_("failed to stat '%*s%s%s'"),
1080 prefix
? prefix
: "",
1081 prefix
? "/" : "", path
);
1087 * A "string_list_each_func_t" function that canonicalizes an entry
1088 * from GIT_CEILING_DIRECTORIES using real_pathdup(), or
1089 * discards it if unusable. The presence of an empty entry in
1090 * GIT_CEILING_DIRECTORIES turns off canonicalization for all
1091 * subsequent entries.
1093 static int canonicalize_ceiling_entry(struct string_list_item
*item
,
1096 int *empty_entry_found
= cb_data
;
1097 char *ceil
= item
->string
;
1100 *empty_entry_found
= 1;
1102 } else if (!is_absolute_path(ceil
)) {
1104 } else if (*empty_entry_found
) {
1105 /* Keep entry but do not canonicalize it */
1108 char *real_path
= real_pathdup(ceil
, 0);
1113 item
->string
= real_path
;
1118 struct safe_directory_data
{
1123 static int safe_directory_cb(const char *key
, const char *value
, void *d
)
1125 struct safe_directory_data
*data
= d
;
1127 if (strcmp(key
, "safe.directory"))
1130 if (!value
|| !*value
) {
1132 } else if (!strcmp(value
, "*")) {
1135 const char *interpolated
= NULL
;
1137 if (!git_config_pathname(&interpolated
, key
, value
) &&
1138 !fspathcmp(data
->path
, interpolated
? interpolated
: value
))
1141 free((char *)interpolated
);
1148 * Check if a repository is safe, by verifying the ownership of the
1149 * worktree (if any), the git directory, and the gitfile (if any).
1151 * Exemptions for known-safe repositories can be added via `safe.directory`
1152 * config settings; for non-bare repositories, their worktree needs to be
1153 * added, for bare ones their git directory.
1155 static int ensure_valid_ownership(const char *gitfile
,
1156 const char *worktree
, const char *gitdir
,
1157 struct strbuf
*report
)
1159 struct safe_directory_data data
= {
1160 .path
= worktree
? worktree
: gitdir
1163 if (!git_env_bool("GIT_TEST_ASSUME_DIFFERENT_OWNER", 0) &&
1164 (!gitfile
|| is_path_owned_by_current_user(gitfile
, report
)) &&
1165 (!worktree
|| is_path_owned_by_current_user(worktree
, report
)) &&
1166 (!gitdir
|| is_path_owned_by_current_user(gitdir
, report
)))
1170 * data.path is the "path" that identifies the repository and it is
1171 * constant regardless of what failed above. data.is_safe should be
1172 * initialized to false, and might be changed by the callback.
1174 git_protected_config(safe_directory_cb
, &data
);
1176 return data
.is_safe
;
1179 static int allowed_bare_repo_cb(const char *key
, const char *value
, void *d
)
1181 enum allowed_bare_repo
*allowed_bare_repo
= d
;
1183 if (strcasecmp(key
, "safe.bareRepository"))
1186 if (!strcmp(value
, "explicit")) {
1187 *allowed_bare_repo
= ALLOWED_BARE_REPO_EXPLICIT
;
1190 if (!strcmp(value
, "all")) {
1191 *allowed_bare_repo
= ALLOWED_BARE_REPO_ALL
;
1197 static enum allowed_bare_repo
get_allowed_bare_repo(void)
1199 enum allowed_bare_repo result
= ALLOWED_BARE_REPO_ALL
;
1200 git_protected_config(allowed_bare_repo_cb
, &result
);
1204 static const char *allowed_bare_repo_to_string(
1205 enum allowed_bare_repo allowed_bare_repo
)
1207 switch (allowed_bare_repo
) {
1208 case ALLOWED_BARE_REPO_EXPLICIT
:
1210 case ALLOWED_BARE_REPO_ALL
:
1213 BUG("invalid allowed_bare_repo %d",
1219 enum discovery_result
{
1224 /* these are errors */
1225 GIT_DIR_HIT_CEILING
= -1,
1226 GIT_DIR_HIT_MOUNT_POINT
= -2,
1227 GIT_DIR_INVALID_GITFILE
= -3,
1228 GIT_DIR_INVALID_OWNERSHIP
= -4,
1229 GIT_DIR_DISALLOWED_BARE
= -5,
1233 * We cannot decide in this function whether we are in the work tree or
1234 * not, since the config can only be read _after_ this function was called.
1236 * Also, we avoid changing any global state (such as the current working
1237 * directory) to allow early callers.
1239 * The directory where the search should start needs to be passed in via the
1240 * `dir` parameter; upon return, the `dir` buffer will contain the path of
1241 * the directory where the search ended, and `gitdir` will contain the path of
1242 * the discovered .git/ directory, if any. If `gitdir` is not absolute, it
1243 * is relative to `dir` (i.e. *not* necessarily the cwd).
1245 static enum discovery_result
setup_git_directory_gently_1(struct strbuf
*dir
,
1246 struct strbuf
*gitdir
,
1247 struct strbuf
*report
,
1250 const char *env_ceiling_dirs
= getenv(CEILING_DIRECTORIES_ENVIRONMENT
);
1251 struct string_list ceiling_dirs
= STRING_LIST_INIT_DUP
;
1252 const char *gitdirenv
;
1253 int ceil_offset
= -1, min_offset
= offset_1st_component(dir
->buf
);
1254 dev_t current_device
= 0;
1255 int one_filesystem
= 1;
1258 * If GIT_DIR is set explicitly, we're not going
1259 * to do any discovery, but we still do repository
1262 gitdirenv
= getenv(GIT_DIR_ENVIRONMENT
);
1264 strbuf_addstr(gitdir
, gitdirenv
);
1265 return GIT_DIR_EXPLICIT
;
1268 if (env_ceiling_dirs
) {
1269 int empty_entry_found
= 0;
1271 string_list_split(&ceiling_dirs
, env_ceiling_dirs
, PATH_SEP
, -1);
1272 filter_string_list(&ceiling_dirs
, 0,
1273 canonicalize_ceiling_entry
, &empty_entry_found
);
1274 ceil_offset
= longest_ancestor_length(dir
->buf
, &ceiling_dirs
);
1275 string_list_clear(&ceiling_dirs
, 0);
1278 if (ceil_offset
< 0)
1279 ceil_offset
= min_offset
- 2;
1281 if (min_offset
&& min_offset
== dir
->len
&&
1282 !is_dir_sep(dir
->buf
[min_offset
- 1])) {
1283 strbuf_addch(dir
, '/');
1288 * Test in the following order (relative to the dir):
1289 * - .git (file containing "gitdir: <path>")
1298 one_filesystem
= !git_env_bool("GIT_DISCOVERY_ACROSS_FILESYSTEM", 0);
1300 current_device
= get_device_or_die(dir
->buf
, NULL
, 0);
1302 int offset
= dir
->len
, error_code
= 0;
1303 char *gitdir_path
= NULL
;
1304 char *gitfile
= NULL
;
1306 if (offset
> min_offset
)
1307 strbuf_addch(dir
, '/');
1308 strbuf_addstr(dir
, DEFAULT_GIT_DIR_ENVIRONMENT
);
1309 gitdirenv
= read_gitfile_gently(dir
->buf
, die_on_error
?
1310 NULL
: &error_code
);
1313 error_code
== READ_GITFILE_ERR_NOT_A_FILE
) {
1314 /* NEEDSWORK: fail if .git is not file nor dir */
1315 if (is_git_directory(dir
->buf
)) {
1316 gitdirenv
= DEFAULT_GIT_DIR_ENVIRONMENT
;
1317 gitdir_path
= xstrdup(dir
->buf
);
1319 } else if (error_code
!= READ_GITFILE_ERR_STAT_FAILED
)
1320 return GIT_DIR_INVALID_GITFILE
;
1322 gitfile
= xstrdup(dir
->buf
);
1324 * Earlier, we tentatively added DEFAULT_GIT_DIR_ENVIRONMENT
1325 * to check that directory for a repository.
1326 * Now trim that tentative addition away, because we want to
1327 * focus on the real directory we are in.
1329 strbuf_setlen(dir
, offset
);
1331 enum discovery_result ret
;
1332 const char *gitdir_candidate
=
1333 gitdir_path
? gitdir_path
: gitdirenv
;
1335 if (ensure_valid_ownership(gitfile
, dir
->buf
,
1336 gitdir_candidate
, report
)) {
1337 strbuf_addstr(gitdir
, gitdirenv
);
1338 ret
= GIT_DIR_DISCOVERED
;
1340 ret
= GIT_DIR_INVALID_OWNERSHIP
;
1343 * Earlier, during discovery, we might have allocated
1344 * string copies for gitdir_path or gitfile so make
1345 * sure we don't leak by freeing them now, before
1346 * leaving the loop and function.
1348 * Note: gitdirenv will be non-NULL whenever these are
1349 * allocated, therefore we need not take care of releasing
1350 * them outside of this conditional block.
1358 if (is_git_directory(dir
->buf
)) {
1359 trace2_data_string("setup", NULL
, "implicit-bare-repository", dir
->buf
);
1360 if (get_allowed_bare_repo() == ALLOWED_BARE_REPO_EXPLICIT
)
1361 return GIT_DIR_DISALLOWED_BARE
;
1362 if (!ensure_valid_ownership(NULL
, NULL
, dir
->buf
, report
))
1363 return GIT_DIR_INVALID_OWNERSHIP
;
1364 strbuf_addstr(gitdir
, ".");
1365 return GIT_DIR_BARE
;
1368 if (offset
<= min_offset
)
1369 return GIT_DIR_HIT_CEILING
;
1371 while (--offset
> ceil_offset
&& !is_dir_sep(dir
->buf
[offset
]))
1373 if (offset
<= ceil_offset
)
1374 return GIT_DIR_HIT_CEILING
;
1376 strbuf_setlen(dir
, offset
> min_offset
? offset
: min_offset
);
1377 if (one_filesystem
&&
1378 current_device
!= get_device_or_die(dir
->buf
, NULL
, offset
))
1379 return GIT_DIR_HIT_MOUNT_POINT
;
1383 int discover_git_directory(struct strbuf
*commondir
,
1384 struct strbuf
*gitdir
)
1386 struct strbuf dir
= STRBUF_INIT
, err
= STRBUF_INIT
;
1387 size_t gitdir_offset
= gitdir
->len
, cwd_len
;
1388 size_t commondir_offset
= commondir
->len
;
1389 struct repository_format candidate
= REPOSITORY_FORMAT_INIT
;
1391 if (strbuf_getcwd(&dir
))
1395 if (setup_git_directory_gently_1(&dir
, gitdir
, NULL
, 0) <= 0) {
1396 strbuf_release(&dir
);
1401 * The returned gitdir is relative to dir, and if dir does not reflect
1402 * the current working directory, we simply make the gitdir absolute.
1404 if (dir
.len
< cwd_len
&& !is_absolute_path(gitdir
->buf
+ gitdir_offset
)) {
1405 /* Avoid a trailing "/." */
1406 if (!strcmp(".", gitdir
->buf
+ gitdir_offset
))
1407 strbuf_setlen(gitdir
, gitdir_offset
);
1409 strbuf_addch(&dir
, '/');
1410 strbuf_insert(gitdir
, gitdir_offset
, dir
.buf
, dir
.len
);
1413 get_common_dir(commondir
, gitdir
->buf
+ gitdir_offset
);
1416 strbuf_addf(&dir
, "%s/config", commondir
->buf
+ commondir_offset
);
1417 read_repository_format(&candidate
, dir
.buf
);
1418 strbuf_release(&dir
);
1420 if (verify_repository_format(&candidate
, &err
) < 0) {
1421 warning("ignoring git dir '%s': %s",
1422 gitdir
->buf
+ gitdir_offset
, err
.buf
);
1423 strbuf_release(&err
);
1424 strbuf_setlen(commondir
, commondir_offset
);
1425 strbuf_setlen(gitdir
, gitdir_offset
);
1426 clear_repository_format(&candidate
);
1430 clear_repository_format(&candidate
);
1434 const char *setup_git_directory_gently(int *nongit_ok
)
1436 static struct strbuf cwd
= STRBUF_INIT
;
1437 struct strbuf dir
= STRBUF_INIT
, gitdir
= STRBUF_INIT
, report
= STRBUF_INIT
;
1438 const char *prefix
= NULL
;
1439 struct repository_format repo_fmt
= REPOSITORY_FORMAT_INIT
;
1442 * We may have read an incomplete configuration before
1443 * setting-up the git directory. If so, clear the cache so
1444 * that the next queries to the configuration reload complete
1445 * configuration (including the per-repo config file that we
1446 * ignored previously).
1451 * Let's assume that we are in a git repository.
1452 * If it turns out later that we are somewhere else, the value will be
1453 * updated accordingly.
1458 if (strbuf_getcwd(&cwd
))
1459 die_errno(_("Unable to read current working directory"));
1460 strbuf_addbuf(&dir
, &cwd
);
1462 switch (setup_git_directory_gently_1(&dir
, &gitdir
, &report
, 1)) {
1463 case GIT_DIR_EXPLICIT
:
1464 prefix
= setup_explicit_git_dir(gitdir
.buf
, &cwd
, &repo_fmt
, nongit_ok
);
1466 case GIT_DIR_DISCOVERED
:
1467 if (dir
.len
< cwd
.len
&& chdir(dir
.buf
))
1468 die(_("cannot change to '%s'"), dir
.buf
);
1469 prefix
= setup_discovered_git_dir(gitdir
.buf
, &cwd
, dir
.len
,
1470 &repo_fmt
, nongit_ok
);
1473 if (dir
.len
< cwd
.len
&& chdir(dir
.buf
))
1474 die(_("cannot change to '%s'"), dir
.buf
);
1475 prefix
= setup_bare_git_dir(&cwd
, dir
.len
, &repo_fmt
, nongit_ok
);
1477 case GIT_DIR_HIT_CEILING
:
1479 die(_("not a git repository (or any of the parent directories): %s"),
1480 DEFAULT_GIT_DIR_ENVIRONMENT
);
1483 case GIT_DIR_HIT_MOUNT_POINT
:
1485 die(_("not a git repository (or any parent up to mount point %s)\n"
1486 "Stopping at filesystem boundary (GIT_DISCOVERY_ACROSS_FILESYSTEM not set)."),
1490 case GIT_DIR_INVALID_OWNERSHIP
:
1492 struct strbuf quoted
= STRBUF_INIT
;
1494 strbuf_complete(&report
, '\n');
1495 sq_quote_buf_pretty("ed
, dir
.buf
);
1496 die(_("detected dubious ownership in repository at '%s'\n"
1498 "To add an exception for this directory, call:\n"
1500 "\tgit config --global --add safe.directory %s"),
1501 dir
.buf
, report
.buf
, quoted
.buf
);
1505 case GIT_DIR_DISALLOWED_BARE
:
1507 die(_("cannot use bare repository '%s' (safe.bareRepository is '%s')"),
1509 allowed_bare_repo_to_string(get_allowed_bare_repo()));
1515 * As a safeguard against setup_git_directory_gently_1 returning
1516 * this value, fallthrough to BUG. Otherwise it is possible to
1517 * set startup_info->have_repository to 1 when we did nothing to
1518 * find a repository.
1521 BUG("unhandled setup_git_directory_gently_1() result");
1525 * At this point, nongit_ok is stable. If it is non-NULL and points
1526 * to a non-zero value, then this means that we haven't found a
1527 * repository and that the caller expects startup_info to reflect
1530 * Regardless of the state of nongit_ok, startup_info->prefix and
1531 * the GIT_PREFIX environment variable must always match. For details
1532 * see Documentation/config/alias.txt.
1534 if (nongit_ok
&& *nongit_ok
)
1535 startup_info
->have_repository
= 0;
1537 startup_info
->have_repository
= 1;
1540 * Not all paths through the setup code will call 'set_git_dir()' (which
1541 * directly sets up the environment) so in order to guarantee that the
1542 * environment is in a consistent state after setup, explicitly setup
1543 * the environment if we have a repository.
1545 * NEEDSWORK: currently we allow bogus GIT_DIR values to be set in some
1546 * code paths so we also need to explicitly setup the environment if
1547 * the user has set GIT_DIR. It may be beneficial to disallow bogus
1548 * GIT_DIR values at some point in the future.
1550 if (/* GIT_DIR_EXPLICIT, GIT_DIR_DISCOVERED, GIT_DIR_BARE */
1551 startup_info
->have_repository
||
1552 /* GIT_DIR_EXPLICIT */
1553 getenv(GIT_DIR_ENVIRONMENT
)) {
1554 if (!the_repository
->gitdir
) {
1555 const char *gitdir
= getenv(GIT_DIR_ENVIRONMENT
);
1557 gitdir
= DEFAULT_GIT_DIR_ENVIRONMENT
;
1558 setup_git_env(gitdir
);
1560 if (startup_info
->have_repository
) {
1561 repo_set_hash_algo(the_repository
, repo_fmt
.hash_algo
);
1562 the_repository
->repository_format_worktree_config
=
1563 repo_fmt
.worktree_config
;
1564 /* take ownership of repo_fmt.partial_clone */
1565 the_repository
->repository_format_partial_clone
=
1566 repo_fmt
.partial_clone
;
1567 repo_fmt
.partial_clone
= NULL
;
1571 * Since precompose_string_if_needed() needs to look at
1572 * the core.precomposeunicode configuration, this
1573 * has to happen after the above block that finds
1574 * out where the repository is, i.e. a preparation
1575 * for calling git_config_get_bool().
1578 prefix
= precompose_string_if_needed(prefix
);
1579 startup_info
->prefix
= prefix
;
1580 setenv(GIT_PREFIX_ENVIRONMENT
, prefix
, 1);
1582 startup_info
->prefix
= NULL
;
1583 setenv(GIT_PREFIX_ENVIRONMENT
, "", 1);
1586 setup_original_cwd();
1588 strbuf_release(&dir
);
1589 strbuf_release(&gitdir
);
1590 strbuf_release(&report
);
1591 clear_repository_format(&repo_fmt
);
1596 int git_config_perm(const char *var
, const char *value
)
1604 if (!strcmp(value
, "umask"))
1606 if (!strcmp(value
, "group"))
1608 if (!strcmp(value
, "all") ||
1609 !strcmp(value
, "world") ||
1610 !strcmp(value
, "everybody"))
1611 return PERM_EVERYBODY
;
1613 /* Parse octal numbers */
1614 i
= strtol(value
, &endptr
, 8);
1616 /* If not an octal number, maybe true/false? */
1618 return git_config_bool(var
, value
) ? PERM_GROUP
: PERM_UMASK
;
1621 * Treat values 0, 1 and 2 as compatibility cases, otherwise it is
1622 * a chmod value to restrict to.
1625 case PERM_UMASK
: /* 0 */
1627 case OLD_PERM_GROUP
: /* 1 */
1629 case OLD_PERM_EVERYBODY
: /* 2 */
1630 return PERM_EVERYBODY
;
1633 /* A filemode value was given: 0xxx */
1635 if ((i
& 0600) != 0600)
1636 die(_("problem with core.sharedRepository filemode value "
1637 "(0%.3o).\nThe owner of files must always have "
1638 "read and write permissions."), i
);
1641 * Mask filemode value. Others can not get write permission.
1642 * x flags for directories are handled separately.
1647 void check_repository_format(struct repository_format
*fmt
)
1649 struct repository_format repo_fmt
= REPOSITORY_FORMAT_INIT
;
1652 check_repository_format_gently(get_git_dir(), fmt
, NULL
);
1653 startup_info
->have_repository
= 1;
1654 repo_set_hash_algo(the_repository
, fmt
->hash_algo
);
1655 the_repository
->repository_format_worktree_config
=
1656 fmt
->worktree_config
;
1657 the_repository
->repository_format_partial_clone
=
1658 xstrdup_or_null(fmt
->partial_clone
);
1659 clear_repository_format(&repo_fmt
);
1663 * Returns the "prefix", a path to the current working directory
1664 * relative to the work tree root, or NULL, if the current working
1665 * directory is not a strict subdirectory of the work tree root. The
1666 * prefix always ends with a '/' character.
1668 const char *setup_git_directory(void)
1670 return setup_git_directory_gently(NULL
);
1673 const char *resolve_gitdir_gently(const char *suspect
, int *return_error_code
)
1675 if (is_git_directory(suspect
))
1677 return read_gitfile_gently(suspect
, return_error_code
);
1680 /* if any standard file descriptor is missing open it to /dev/null */
1681 void sanitize_stdfds(void)
1683 int fd
= xopen("/dev/null", O_RDWR
);
1692 #ifdef NO_POSIX_GOODIES
1700 die_errno(_("fork failed"));
1705 die_errno(_("setsid failed"));
1714 #ifdef NO_TRUSTABLE_FILEMODE
1715 #define TEST_FILEMODE 0
1717 #define TEST_FILEMODE 1
1720 #define GIT_DEFAULT_HASH_ENVIRONMENT "GIT_DEFAULT_HASH"
1722 static void copy_templates_1(struct strbuf
*path
, struct strbuf
*template_path
,
1725 size_t path_baselen
= path
->len
;
1726 size_t template_baselen
= template_path
->len
;
1729 /* Note: if ".git/hooks" file exists in the repository being
1730 * re-initialized, /etc/core-git/templates/hooks/update would
1731 * cause "git init" to fail here. I think this is sane but
1732 * it means that the set of templates we ship by default, along
1733 * with the way the namespace under .git/ is organized, should
1734 * be really carefully chosen.
1736 safe_create_dir(path
->buf
, 1);
1737 while ((de
= readdir(dir
)) != NULL
) {
1738 struct stat st_git
, st_template
;
1741 strbuf_setlen(path
, path_baselen
);
1742 strbuf_setlen(template_path
, template_baselen
);
1744 if (de
->d_name
[0] == '.')
1746 strbuf_addstr(path
, de
->d_name
);
1747 strbuf_addstr(template_path
, de
->d_name
);
1748 if (lstat(path
->buf
, &st_git
)) {
1749 if (errno
!= ENOENT
)
1750 die_errno(_("cannot stat '%s'"), path
->buf
);
1755 if (lstat(template_path
->buf
, &st_template
))
1756 die_errno(_("cannot stat template '%s'"), template_path
->buf
);
1758 if (S_ISDIR(st_template
.st_mode
)) {
1759 DIR *subdir
= opendir(template_path
->buf
);
1761 die_errno(_("cannot opendir '%s'"), template_path
->buf
);
1762 strbuf_addch(path
, '/');
1763 strbuf_addch(template_path
, '/');
1764 copy_templates_1(path
, template_path
, subdir
);
1769 else if (S_ISLNK(st_template
.st_mode
)) {
1770 struct strbuf lnk
= STRBUF_INIT
;
1771 if (strbuf_readlink(&lnk
, template_path
->buf
,
1772 st_template
.st_size
) < 0)
1773 die_errno(_("cannot readlink '%s'"), template_path
->buf
);
1774 if (symlink(lnk
.buf
, path
->buf
))
1775 die_errno(_("cannot symlink '%s' '%s'"),
1776 lnk
.buf
, path
->buf
);
1777 strbuf_release(&lnk
);
1779 else if (S_ISREG(st_template
.st_mode
)) {
1780 if (copy_file(path
->buf
, template_path
->buf
, st_template
.st_mode
))
1781 die_errno(_("cannot copy '%s' to '%s'"),
1782 template_path
->buf
, path
->buf
);
1785 error(_("ignoring template %s"), template_path
->buf
);
1789 static void copy_templates(const char *template_dir
, const char *init_template_dir
)
1791 struct strbuf path
= STRBUF_INIT
;
1792 struct strbuf template_path
= STRBUF_INIT
;
1793 size_t template_len
;
1794 struct repository_format template_format
= REPOSITORY_FORMAT_INIT
;
1795 struct strbuf err
= STRBUF_INIT
;
1797 char *to_free
= NULL
;
1800 template_dir
= getenv(TEMPLATE_DIR_ENVIRONMENT
);
1802 template_dir
= init_template_dir
;
1804 template_dir
= to_free
= system_path(DEFAULT_GIT_TEMPLATE_DIR
);
1805 if (!template_dir
[0]) {
1810 strbuf_addstr(&template_path
, template_dir
);
1811 strbuf_complete(&template_path
, '/');
1812 template_len
= template_path
.len
;
1814 dir
= opendir(template_path
.buf
);
1816 warning(_("templates not found in %s"), template_dir
);
1820 /* Make sure that template is from the correct vintage */
1821 strbuf_addstr(&template_path
, "config");
1822 read_repository_format(&template_format
, template_path
.buf
);
1823 strbuf_setlen(&template_path
, template_len
);
1826 * No mention of version at all is OK, but anything else should be
1829 if (template_format
.version
>= 0 &&
1830 verify_repository_format(&template_format
, &err
) < 0) {
1831 warning(_("not copying templates from '%s': %s"),
1832 template_dir
, err
.buf
);
1833 strbuf_release(&err
);
1834 goto close_free_return
;
1837 strbuf_addstr(&path
, get_git_common_dir());
1838 strbuf_complete(&path
, '/');
1839 copy_templates_1(&path
, &template_path
, dir
);
1844 strbuf_release(&path
);
1845 strbuf_release(&template_path
);
1846 clear_repository_format(&template_format
);
1850 * If the git_dir is not directly inside the working tree, then git will not
1851 * find it by default, and we need to set the worktree explicitly.
1853 static int needs_work_tree_config(const char *git_dir
, const char *work_tree
)
1855 if (!strcmp(work_tree
, "/") && !strcmp(git_dir
, "/.git"))
1857 if (skip_prefix(git_dir
, work_tree
, &git_dir
) &&
1858 !strcmp(git_dir
, "/.git"))
1863 void initialize_repository_version(int hash_algo
, int reinit
)
1865 char repo_version_string
[10];
1866 int repo_version
= GIT_REPO_VERSION
;
1868 if (hash_algo
!= GIT_HASH_SHA1
)
1869 repo_version
= GIT_REPO_VERSION_READ
;
1871 /* This forces creation of new config file */
1872 xsnprintf(repo_version_string
, sizeof(repo_version_string
),
1873 "%d", repo_version
);
1874 git_config_set("core.repositoryformatversion", repo_version_string
);
1876 if (hash_algo
!= GIT_HASH_SHA1
)
1877 git_config_set("extensions.objectformat",
1878 hash_algos
[hash_algo
].name
);
1880 git_config_set_gently("extensions.objectformat", NULL
);
1883 static int create_default_files(const char *template_path
,
1884 const char *original_git_dir
,
1885 const char *initial_branch
,
1886 const struct repository_format
*fmt
,
1887 int prev_bare_repository
,
1888 int init_shared_repository
,
1892 struct strbuf buf
= STRBUF_INIT
;
1897 struct strbuf err
= STRBUF_INIT
;
1898 const char *init_template_dir
= NULL
;
1899 const char *work_tree
= get_git_work_tree();
1902 * First copy the templates -- we might have the default
1903 * config file there, in which case we would want to read
1904 * from it after installing.
1906 * Before reading that config, we also need to clear out any cached
1907 * values (since we've just potentially changed what's available on
1910 git_config_get_pathname("init.templatedir", &init_template_dir
);
1911 copy_templates(template_path
, init_template_dir
);
1912 free((char *)init_template_dir
);
1914 reset_shared_repository();
1915 git_config(git_default_config
, NULL
);
1918 * We must make sure command-line options continue to override any
1919 * values we might have just re-read from the config.
1921 if (init_shared_repository
!= -1)
1922 set_shared_repository(init_shared_repository
);
1924 * TODO: heed core.bare from config file in templates if no
1925 * command-line override given
1927 is_bare_repository_cfg
= prev_bare_repository
|| !work_tree
;
1928 /* TODO (continued):
1930 * Unfortunately, the line above is equivalent to
1931 * is_bare_repository_cfg = !work_tree;
1932 * which ignores the config entirely even if no `--[no-]bare`
1933 * command line option was present.
1935 * To see why, note that before this function, there was this call:
1936 * prev_bare_repository = is_bare_repository()
1937 * expanding the right hand side:
1938 * = is_bare_repository_cfg && !get_git_work_tree()
1939 * = is_bare_repository_cfg && !work_tree
1940 * note that the last simplification above is valid because nothing
1941 * calls repo_init() or set_git_work_tree() between any of the
1942 * relevant calls in the code, and thus the !get_git_work_tree()
1943 * calls will return the same result each time. So, what we are
1944 * interested in computing is the right hand side of the line of
1945 * code just above this comment:
1946 * prev_bare_repository || !work_tree
1947 * = is_bare_repository_cfg && !work_tree || !work_tree
1949 * because "A && !B || !B == !B" for all boolean values of A & B.
1953 * We would have created the above under user's umask -- under
1954 * shared-repository settings, we would need to fix them up.
1956 if (get_shared_repository()) {
1957 adjust_shared_perm(get_git_dir());
1961 * We need to create a "refs" dir in any case so that older
1962 * versions of git can tell that this is a repository.
1964 safe_create_dir(git_path("refs"), 1);
1965 adjust_shared_perm(git_path("refs"));
1967 if (refs_init_db(&err
))
1968 die("failed to set up refs db: %s", err
.buf
);
1971 * Point the HEAD symref to the initial branch with if HEAD does
1974 path
= git_path_buf(&buf
, "HEAD");
1975 reinit
= (!access(path
, R_OK
)
1976 || readlink(path
, junk
, sizeof(junk
)-1) != -1);
1980 if (!initial_branch
)
1981 initial_branch
= git_default_branch_name(quiet
);
1983 ref
= xstrfmt("refs/heads/%s", initial_branch
);
1984 if (check_refname_format(ref
, 0) < 0)
1985 die(_("invalid initial branch name: '%s'"),
1988 if (create_symref("HEAD", ref
, NULL
) < 0)
1993 initialize_repository_version(fmt
->hash_algo
, 0);
1995 /* Check filemode trustability */
1996 path
= git_path_buf(&buf
, "config");
1997 filemode
= TEST_FILEMODE
;
1998 if (TEST_FILEMODE
&& !lstat(path
, &st1
)) {
2000 filemode
= (!chmod(path
, st1
.st_mode
^ S_IXUSR
) &&
2001 !lstat(path
, &st2
) &&
2002 st1
.st_mode
!= st2
.st_mode
&&
2003 !chmod(path
, st1
.st_mode
));
2004 if (filemode
&& !reinit
&& (st1
.st_mode
& S_IXUSR
))
2007 git_config_set("core.filemode", filemode
? "true" : "false");
2009 if (is_bare_repository())
2010 git_config_set("core.bare", "true");
2012 git_config_set("core.bare", "false");
2013 /* allow template config file to override the default */
2014 if (log_all_ref_updates
== LOG_REFS_UNSET
)
2015 git_config_set("core.logallrefupdates", "true");
2016 if (needs_work_tree_config(original_git_dir
, work_tree
))
2017 git_config_set("core.worktree", work_tree
);
2021 /* Check if symlink is supported in the work tree */
2022 path
= git_path_buf(&buf
, "tXXXXXX");
2023 if (!close(xmkstemp(path
)) &&
2025 !symlink("testing", path
) &&
2026 !lstat(path
, &st1
) &&
2027 S_ISLNK(st1
.st_mode
))
2028 unlink(path
); /* good */
2030 git_config_set("core.symlinks", "false");
2032 /* Check if the filesystem is case-insensitive */
2033 path
= git_path_buf(&buf
, "CoNfIg");
2034 if (!access(path
, F_OK
))
2035 git_config_set("core.ignorecase", "true");
2036 probe_utf8_pathname_composition();
2039 strbuf_release(&buf
);
2043 static void create_object_directory(void)
2045 struct strbuf path
= STRBUF_INIT
;
2048 strbuf_addstr(&path
, get_object_directory());
2051 safe_create_dir(path
.buf
, 1);
2053 strbuf_setlen(&path
, baselen
);
2054 strbuf_addstr(&path
, "/pack");
2055 safe_create_dir(path
.buf
, 1);
2057 strbuf_setlen(&path
, baselen
);
2058 strbuf_addstr(&path
, "/info");
2059 safe_create_dir(path
.buf
, 1);
2061 strbuf_release(&path
);
2064 static void separate_git_dir(const char *git_dir
, const char *git_link
)
2068 if (!stat(git_link
, &st
)) {
2071 if (S_ISREG(st
.st_mode
))
2072 src
= read_gitfile(git_link
);
2073 else if (S_ISDIR(st
.st_mode
))
2076 die(_("unable to handle file type %d"), (int)st
.st_mode
);
2078 if (rename(src
, git_dir
))
2079 die_errno(_("unable to move %s to %s"), src
, git_dir
);
2080 repair_worktrees(NULL
, NULL
);
2083 write_file(git_link
, "gitdir: %s", git_dir
);
2086 static void validate_hash_algorithm(struct repository_format
*repo_fmt
, int hash
)
2088 const char *env
= getenv(GIT_DEFAULT_HASH_ENVIRONMENT
);
2090 * If we already have an initialized repo, don't allow the user to
2091 * specify a different algorithm, as that could cause corruption.
2092 * Otherwise, if the user has specified one on the command line, use it.
2094 if (repo_fmt
->version
>= 0 && hash
!= GIT_HASH_UNKNOWN
&& hash
!= repo_fmt
->hash_algo
)
2095 die(_("attempt to reinitialize repository with different hash"));
2096 else if (hash
!= GIT_HASH_UNKNOWN
)
2097 repo_fmt
->hash_algo
= hash
;
2099 int env_algo
= hash_algo_by_name(env
);
2100 if (env_algo
== GIT_HASH_UNKNOWN
)
2101 die(_("unknown hash algorithm '%s'"), env
);
2102 repo_fmt
->hash_algo
= env_algo
;
2106 int init_db(const char *git_dir
, const char *real_git_dir
,
2107 const char *template_dir
, int hash
, const char *initial_branch
,
2108 int init_shared_repository
, unsigned int flags
)
2111 int exist_ok
= flags
& INIT_DB_EXIST_OK
;
2112 char *original_git_dir
= real_pathdup(git_dir
, 1);
2113 struct repository_format repo_fmt
= REPOSITORY_FORMAT_INIT
;
2114 int prev_bare_repository
;
2119 if (!exist_ok
&& !stat(git_dir
, &st
))
2120 die(_("%s already exists"), git_dir
);
2122 if (!exist_ok
&& !stat(real_git_dir
, &st
))
2123 die(_("%s already exists"), real_git_dir
);
2125 set_git_dir(real_git_dir
, 1);
2126 git_dir
= get_git_dir();
2127 separate_git_dir(git_dir
, original_git_dir
);
2130 set_git_dir(git_dir
, 1);
2131 git_dir
= get_git_dir();
2133 startup_info
->have_repository
= 1;
2135 /* Ensure `core.hidedotfiles` is processed */
2136 git_config(platform_core_config
, NULL
);
2138 safe_create_dir(git_dir
, 0);
2140 prev_bare_repository
= is_bare_repository();
2142 /* Check to see if the repository version is right.
2143 * Note that a newly created repository does not have
2144 * config file, so this will not fail. What we are catching
2145 * is an attempt to reinitialize new repository with an old tool.
2147 check_repository_format(&repo_fmt
);
2149 validate_hash_algorithm(&repo_fmt
, hash
);
2151 reinit
= create_default_files(template_dir
, original_git_dir
,
2152 initial_branch
, &repo_fmt
,
2153 prev_bare_repository
,
2154 init_shared_repository
,
2155 flags
& INIT_DB_QUIET
);
2156 if (reinit
&& initial_branch
)
2157 warning(_("re-init: ignored --initial-branch=%s"),
2160 create_object_directory();
2162 if (get_shared_repository()) {
2164 /* We do not spell "group" and such, so that
2165 * the configuration can be read by older version
2166 * of git. Note, we use octal numbers for new share modes,
2167 * and compatibility values for PERM_GROUP and
2170 if (get_shared_repository() < 0)
2171 /* force to the mode value */
2172 xsnprintf(buf
, sizeof(buf
), "0%o", -get_shared_repository());
2173 else if (get_shared_repository() == PERM_GROUP
)
2174 xsnprintf(buf
, sizeof(buf
), "%d", OLD_PERM_GROUP
);
2175 else if (get_shared_repository() == PERM_EVERYBODY
)
2176 xsnprintf(buf
, sizeof(buf
), "%d", OLD_PERM_EVERYBODY
);
2178 BUG("invalid value for shared_repository");
2179 git_config_set("core.sharedrepository", buf
);
2180 git_config_set("receive.denyNonFastforwards", "true");
2183 if (!(flags
& INIT_DB_QUIET
)) {
2184 int len
= strlen(git_dir
);
2187 printf(get_shared_repository()
2188 ? _("Reinitialized existing shared Git repository in %s%s\n")
2189 : _("Reinitialized existing Git repository in %s%s\n"),
2190 git_dir
, len
&& git_dir
[len
-1] != '/' ? "/" : "");
2192 printf(get_shared_repository()
2193 ? _("Initialized empty shared Git repository in %s%s\n")
2194 : _("Initialized empty Git repository in %s%s\n"),
2195 git_dir
, len
&& git_dir
[len
-1] != '/' ? "/" : "");
2198 free(original_git_dir
);