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"
20 static int inside_git_dir
= -1;
21 static int inside_work_tree
= -1;
22 static int work_tree_config_is_bogus
;
23 enum allowed_bare_repo
{
24 ALLOWED_BARE_REPO_EXPLICIT
= 0,
25 ALLOWED_BARE_REPO_ALL
,
28 static struct startup_info the_startup_info
;
29 struct startup_info
*startup_info
= &the_startup_info
;
30 const char *tmp_original_cwd
;
33 * The input parameter must contain an absolute path, and it must already be
36 * Find the part of an absolute path that lies inside the work tree by
37 * dereferencing symlinks outside the work tree, for example:
38 * /dir1/repo/dir2/file (work tree is /dir1/repo) -> dir2/file
39 * /dir/file (work tree is /) -> dir/file
40 * /dir/symlink1/symlink2 (symlink1 points to work tree) -> symlink2
41 * /dir/repolink/file (repolink points to /dir/repo) -> file
42 * /dir/repo (exactly equal to work tree) -> (empty string)
44 static int abspath_part_inside_repo(char *path
)
50 const char *work_tree
= get_git_work_tree();
51 struct strbuf realpath
= STRBUF_INIT
;
55 wtlen
= strlen(work_tree
);
57 off
= offset_1st_component(path
);
59 /* check if work tree is already the prefix */
60 if (wtlen
<= len
&& !fspathncmp(path
, work_tree
, wtlen
)) {
61 if (path
[wtlen
] == '/') {
62 memmove(path
, path
+ wtlen
+ 1, len
- wtlen
);
64 } else if (path
[wtlen
- 1] == '/' || path
[wtlen
] == '\0') {
65 /* work tree is the root, or the whole path */
66 memmove(path
, path
+ wtlen
, len
- wtlen
+ 1);
69 /* work tree might match beginning of a symlink to work tree */
75 /* check each '/'-terminated level */
80 strbuf_realpath(&realpath
, path0
, 1);
81 if (fspathcmp(realpath
.buf
, work_tree
) == 0) {
82 memmove(path0
, path
+ 1, len
- (path
- path0
));
83 strbuf_release(&realpath
);
90 /* check whole path */
91 strbuf_realpath(&realpath
, path0
, 1);
92 if (fspathcmp(realpath
.buf
, work_tree
) == 0) {
94 strbuf_release(&realpath
);
98 strbuf_release(&realpath
);
103 * Normalize "path", prepending the "prefix" for relative paths. If
104 * remaining_prefix is not NULL, return the actual prefix still
105 * remains in the path. For example, prefix = sub1/sub2/ and path is
107 * foo -> sub1/sub2/foo (full prefix)
108 * ../foo -> sub1/foo (remaining prefix is sub1/)
109 * ../../bar -> bar (no remaining prefix)
110 * ../../sub1/sub2/foo -> sub1/sub2/foo (but no remaining prefix)
111 * `pwd`/../bar -> sub1/bar (no remaining prefix)
113 char *prefix_path_gently(const char *prefix
, int len
,
114 int *remaining_prefix
, const char *path
)
116 const char *orig
= path
;
118 if (is_absolute_path(orig
)) {
119 sanitized
= xmallocz(strlen(path
));
120 if (remaining_prefix
)
121 *remaining_prefix
= 0;
122 if (normalize_path_copy_len(sanitized
, path
, remaining_prefix
)) {
126 if (abspath_part_inside_repo(sanitized
)) {
131 sanitized
= xstrfmt("%.*s%s", len
, len
? prefix
: "", path
);
132 if (remaining_prefix
)
133 *remaining_prefix
= len
;
134 if (normalize_path_copy_len(sanitized
, sanitized
, remaining_prefix
)) {
142 char *prefix_path(const char *prefix
, int len
, const char *path
)
144 char *r
= prefix_path_gently(prefix
, len
, NULL
, path
);
146 const char *hint_path
= get_git_work_tree();
148 hint_path
= get_git_dir();
149 die(_("'%s' is outside repository at '%s'"), path
,
150 absolute_path(hint_path
));
155 int path_inside_repo(const char *prefix
, const char *path
)
157 int len
= prefix
? strlen(prefix
) : 0;
158 char *r
= prefix_path_gently(prefix
, len
, NULL
, path
);
166 int check_filename(const char *prefix
, const char *arg
)
168 char *to_free
= NULL
;
171 if (skip_prefix(arg
, ":/", &arg
)) {
172 if (!*arg
) /* ":/" is root dir, always exists */
175 } else if (skip_prefix(arg
, ":!", &arg
) ||
176 skip_prefix(arg
, ":^", &arg
)) {
177 if (!*arg
) /* excluding everything is silly, but allowed */
182 arg
= to_free
= prefix_filename(prefix
, arg
);
184 if (!lstat(arg
, &st
)) {
186 return 1; /* file exists */
188 if (is_missing_file_error(errno
)) {
190 return 0; /* file does not exist */
192 die_errno(_("failed to stat '%s'"), arg
);
195 static void NORETURN
die_verify_filename(struct repository
*r
,
198 int diagnose_misspelt_rev
)
200 if (!diagnose_misspelt_rev
)
201 die(_("%s: no such path in the working tree.\n"
202 "Use 'git <command> -- <path>...' to specify paths that do not exist locally."),
205 * Saying "'(icase)foo' does not exist in the index" when the
206 * user gave us ":(icase)foo" is just stupid. A magic pathspec
207 * begins with a colon and is followed by a non-alnum; do not
208 * let maybe_die_on_misspelt_object_name() even trigger.
210 if (!(arg
[0] == ':' && !isalnum(arg
[1])))
211 maybe_die_on_misspelt_object_name(r
, arg
, prefix
);
213 /* ... or fall back the most general message. */
214 die(_("ambiguous argument '%s': unknown revision or path not in the working tree.\n"
215 "Use '--' to separate paths from revisions, like this:\n"
216 "'git <command> [<revision>...] -- [<file>...]'"), arg
);
221 * Check for arguments that don't resolve as actual files,
222 * but which look sufficiently like pathspecs that we'll consider
223 * them such for the purposes of rev/pathspec DWIM parsing.
225 static int looks_like_pathspec(const char *arg
)
231 * Wildcard characters imply the user is looking to match pathspecs
232 * that aren't in the filesystem. Note that this doesn't include
233 * backslash even though it's a glob special; by itself it doesn't
234 * cause any increase in the match. Likewise ignore backslash-escaped
235 * wildcard characters.
237 for (p
= arg
; *p
; p
++) {
240 } else if (is_glob_special(*p
)) {
248 /* long-form pathspec magic */
249 if (starts_with(arg
, ":("))
256 * Verify a filename that we got as an argument for a pathspec
257 * entry. Note that a filename that begins with "-" never verifies
258 * as true, because even if such a filename were to exist, we want
259 * it to be preceded by the "--" marker (or we want the user to
260 * use a format like "./-filename")
262 * The "diagnose_misspelt_rev" is used to provide a user-friendly
263 * diagnosis when dying upon finding that "name" is not a pathname.
264 * If set to 1, the diagnosis will try to diagnose "name" as an
265 * invalid object name (e.g. HEAD:foo). If set to 0, the diagnosis
266 * will only complain about an inexisting file.
268 * This function is typically called to check that a "file or rev"
269 * argument is unambiguous. In this case, the caller will want
270 * diagnose_misspelt_rev == 1 when verifying the first non-rev
271 * argument (which could have been a revision), and
272 * diagnose_misspelt_rev == 0 for the next ones (because we already
273 * saw a filename, there's not ambiguity anymore).
275 void verify_filename(const char *prefix
,
277 int diagnose_misspelt_rev
)
280 die(_("option '%s' must come before non-option arguments"), arg
);
281 if (looks_like_pathspec(arg
) || check_filename(prefix
, arg
))
283 die_verify_filename(the_repository
, prefix
, arg
, diagnose_misspelt_rev
);
287 * Opposite of the above: the command line did not have -- marker
288 * and we parsed the arg as a refname. It should not be interpretable
291 void verify_non_filename(const char *prefix
, const char *arg
)
293 if (!is_inside_work_tree() || is_inside_git_dir())
297 if (!check_filename(prefix
, arg
))
299 die(_("ambiguous argument '%s': both revision and filename\n"
300 "Use '--' to separate paths from revisions, like this:\n"
301 "'git <command> [<revision>...] -- [<file>...]'"), arg
);
304 int get_common_dir(struct strbuf
*sb
, const char *gitdir
)
306 const char *git_env_common_dir
= getenv(GIT_COMMON_DIR_ENVIRONMENT
);
307 if (git_env_common_dir
) {
308 strbuf_addstr(sb
, git_env_common_dir
);
311 return get_common_dir_noenv(sb
, gitdir
);
315 int get_common_dir_noenv(struct strbuf
*sb
, const char *gitdir
)
317 struct strbuf data
= STRBUF_INIT
;
318 struct strbuf path
= STRBUF_INIT
;
321 strbuf_addf(&path
, "%s/commondir", gitdir
);
322 if (file_exists(path
.buf
)) {
323 if (strbuf_read_file(&data
, path
.buf
, 0) <= 0)
324 die_errno(_("failed to read %s"), path
.buf
);
325 while (data
.len
&& (data
.buf
[data
.len
- 1] == '\n' ||
326 data
.buf
[data
.len
- 1] == '\r'))
328 data
.buf
[data
.len
] = '\0';
330 if (!is_absolute_path(data
.buf
))
331 strbuf_addf(&path
, "%s/", gitdir
);
332 strbuf_addbuf(&path
, &data
);
333 strbuf_add_real_path(sb
, path
.buf
);
336 strbuf_addstr(sb
, gitdir
);
339 strbuf_release(&data
);
340 strbuf_release(&path
);
345 * Test if it looks like we're at a git directory.
348 * - either an objects/ directory _or_ the proper
349 * GIT_OBJECT_DIRECTORY environment variable
350 * - a refs/ directory
351 * - either a HEAD symlink or a HEAD file that is formatted as
352 * a proper "ref:", or a regular file HEAD that has a properly
353 * formatted sha1 object name.
355 int is_git_directory(const char *suspect
)
357 struct strbuf path
= STRBUF_INIT
;
361 /* Check worktree-related signatures */
362 strbuf_addstr(&path
, suspect
);
363 strbuf_complete(&path
, '/');
364 strbuf_addstr(&path
, "HEAD");
365 if (validate_headref(path
.buf
))
369 get_common_dir(&path
, suspect
);
372 /* Check non-worktree-related signatures */
373 if (getenv(DB_ENVIRONMENT
)) {
374 if (access(getenv(DB_ENVIRONMENT
), X_OK
))
378 strbuf_setlen(&path
, len
);
379 strbuf_addstr(&path
, "/objects");
380 if (access(path
.buf
, X_OK
))
384 strbuf_setlen(&path
, len
);
385 strbuf_addstr(&path
, "/refs");
386 if (access(path
.buf
, X_OK
))
391 strbuf_release(&path
);
395 int is_nonbare_repository_dir(struct strbuf
*path
)
399 size_t orig_path_len
= path
->len
;
400 assert(orig_path_len
!= 0);
401 strbuf_complete(path
, '/');
402 strbuf_addstr(path
, ".git");
403 if (read_gitfile_gently(path
->buf
, &gitfile_error
) || is_git_directory(path
->buf
))
405 if (gitfile_error
== READ_GITFILE_ERR_OPEN_FAILED
||
406 gitfile_error
== READ_GITFILE_ERR_READ_FAILED
)
408 strbuf_setlen(path
, orig_path_len
);
412 int is_inside_git_dir(void)
414 if (inside_git_dir
< 0)
415 inside_git_dir
= is_inside_dir(get_git_dir());
416 return inside_git_dir
;
419 int is_inside_work_tree(void)
421 if (inside_work_tree
< 0)
422 inside_work_tree
= is_inside_dir(get_git_work_tree());
423 return inside_work_tree
;
426 void setup_work_tree(void)
428 const char *work_tree
;
429 static int initialized
= 0;
434 if (work_tree_config_is_bogus
)
435 die(_("unable to set up work tree using invalid config"));
437 work_tree
= get_git_work_tree();
438 if (!work_tree
|| chdir_notify(work_tree
))
439 die(_("this operation must be run in a work tree"));
442 * Make sure subsequent git processes find correct worktree
443 * if $GIT_WORK_TREE is set relative
445 if (getenv(GIT_WORK_TREE_ENVIRONMENT
))
446 setenv(GIT_WORK_TREE_ENVIRONMENT
, ".", 1);
451 static void setup_original_cwd(void)
453 struct strbuf tmp
= STRBUF_INIT
;
454 const char *worktree
= NULL
;
457 if (!tmp_original_cwd
)
461 * startup_info->original_cwd points to the current working
462 * directory we inherited from our parent process, which is a
463 * directory we want to avoid removing.
465 * For convience, we would like to have the path relative to the
466 * worktree instead of an absolute path.
468 * Yes, startup_info->original_cwd is usually the same as 'prefix',
469 * but differs in two ways:
470 * - prefix has a trailing '/'
471 * - if the user passes '-C' to git, that modifies the prefix but
472 * not startup_info->original_cwd.
475 /* Normalize the directory */
476 if (!strbuf_realpath(&tmp
, tmp_original_cwd
, 0)) {
477 trace2_data_string("setup", the_repository
,
478 "realpath-path", tmp_original_cwd
);
479 trace2_data_string("setup", the_repository
,
480 "realpath-failure", strerror(errno
));
481 free((char*)tmp_original_cwd
);
482 tmp_original_cwd
= NULL
;
486 free((char*)tmp_original_cwd
);
487 tmp_original_cwd
= NULL
;
488 startup_info
->original_cwd
= strbuf_detach(&tmp
, NULL
);
491 * Get our worktree; we only protect the current working directory
492 * if it's in the worktree.
494 worktree
= get_git_work_tree();
496 goto no_prevention_needed
;
498 offset
= dir_inside_of(startup_info
->original_cwd
, worktree
);
501 * If startup_info->original_cwd == worktree, that is already
502 * protected and we don't need original_cwd as a secondary
503 * protection measure.
505 if (!*(startup_info
->original_cwd
+ offset
))
506 goto no_prevention_needed
;
509 * original_cwd was inside worktree; precompose it just as
510 * we do prefix so that built up paths will match
512 startup_info
->original_cwd
= \
513 precompose_string_if_needed(startup_info
->original_cwd
518 no_prevention_needed
:
519 free((char*)startup_info
->original_cwd
);
520 startup_info
->original_cwd
= NULL
;
523 static int read_worktree_config(const char *var
, const char *value
,
524 const struct config_context
*ctx UNUSED
,
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
,
597 const struct config_context
*ctx
, void *vdata
)
599 struct repository_format
*data
= vdata
;
602 if (strcmp(var
, "core.repositoryformatversion") == 0)
603 data
->version
= git_config_int(var
, value
, ctx
->kvi
);
604 else if (skip_prefix(var
, "extensions.", &ext
)) {
605 switch (handle_extension_v0(var
, value
, ext
, data
)) {
606 case EXTENSION_ERROR
:
610 case EXTENSION_UNKNOWN
:
614 switch (handle_extension(var
, value
, ext
, data
)) {
615 case EXTENSION_ERROR
:
618 string_list_append(&data
->v1_only_extensions
, ext
);
620 case EXTENSION_UNKNOWN
:
621 string_list_append(&data
->unknown_extensions
, ext
);
626 return read_worktree_config(var
, value
, ctx
, vdata
);
629 static int check_repository_format_gently(const char *gitdir
, struct repository_format
*candidate
, int *nongit_ok
)
631 struct strbuf sb
= STRBUF_INIT
;
632 struct strbuf err
= STRBUF_INIT
;
635 has_common
= get_common_dir(&sb
, gitdir
);
636 strbuf_addstr(&sb
, "/config");
637 read_repository_format(candidate
, sb
.buf
);
641 * For historical use of check_repository_format() in git-init,
642 * we treat a missing config as a silent "ok", even when nongit_ok
645 if (candidate
->version
< 0)
648 if (verify_repository_format(candidate
, &err
) < 0) {
650 warning("%s", err
.buf
);
651 strbuf_release(&err
);
658 repository_format_precious_objects
= candidate
->precious_objects
;
659 string_list_clear(&candidate
->unknown_extensions
, 0);
660 string_list_clear(&candidate
->v1_only_extensions
, 0);
662 if (candidate
->worktree_config
) {
664 * pick up core.bare and core.worktree from per-worktree
667 strbuf_addf(&sb
, "%s/config.worktree", gitdir
);
668 git_config_from_file(read_worktree_config
, sb
.buf
, candidate
);
674 if (candidate
->is_bare
!= -1) {
675 is_bare_repository_cfg
= candidate
->is_bare
;
676 if (is_bare_repository_cfg
== 1)
677 inside_work_tree
= -1;
679 if (candidate
->work_tree
) {
680 free(git_work_tree_cfg
);
681 git_work_tree_cfg
= xstrdup(candidate
->work_tree
);
682 inside_work_tree
= -1;
689 int upgrade_repository_format(int target_version
)
691 struct strbuf sb
= STRBUF_INIT
;
692 struct strbuf err
= STRBUF_INIT
;
693 struct strbuf repo_version
= STRBUF_INIT
;
694 struct repository_format repo_fmt
= REPOSITORY_FORMAT_INIT
;
697 strbuf_git_common_path(&sb
, the_repository
, "config");
698 read_repository_format(&repo_fmt
, sb
.buf
);
701 if (repo_fmt
.version
>= target_version
) {
706 if (verify_repository_format(&repo_fmt
, &err
) < 0) {
707 ret
= error("cannot upgrade repository format from %d to %d: %s",
708 repo_fmt
.version
, target_version
, err
.buf
);
711 if (!repo_fmt
.version
&& repo_fmt
.unknown_extensions
.nr
) {
712 ret
= error("cannot upgrade repository format: "
713 "unknown extension %s",
714 repo_fmt
.unknown_extensions
.items
[0].string
);
718 strbuf_addf(&repo_version
, "%d", target_version
);
719 git_config_set("core.repositoryformatversion", repo_version
.buf
);
724 clear_repository_format(&repo_fmt
);
725 strbuf_release(&repo_version
);
726 strbuf_release(&err
);
730 static void init_repository_format(struct repository_format
*format
)
732 const struct repository_format fresh
= REPOSITORY_FORMAT_INIT
;
734 memcpy(format
, &fresh
, sizeof(fresh
));
737 int read_repository_format(struct repository_format
*format
, const char *path
)
739 clear_repository_format(format
);
740 git_config_from_file(check_repo_format
, path
, format
);
741 if (format
->version
== -1)
742 clear_repository_format(format
);
743 return format
->version
;
746 void clear_repository_format(struct repository_format
*format
)
748 string_list_clear(&format
->unknown_extensions
, 0);
749 string_list_clear(&format
->v1_only_extensions
, 0);
750 free(format
->work_tree
);
751 free(format
->partial_clone
);
752 init_repository_format(format
);
755 int verify_repository_format(const struct repository_format
*format
,
758 if (GIT_REPO_VERSION_READ
< format
->version
) {
759 strbuf_addf(err
, _("Expected git repo version <= %d, found %d"),
760 GIT_REPO_VERSION_READ
, format
->version
);
764 if (format
->version
>= 1 && format
->unknown_extensions
.nr
) {
767 strbuf_addstr(err
, Q_("unknown repository extension found:",
768 "unknown repository extensions found:",
769 format
->unknown_extensions
.nr
));
771 for (i
= 0; i
< format
->unknown_extensions
.nr
; i
++)
772 strbuf_addf(err
, "\n\t%s",
773 format
->unknown_extensions
.items
[i
].string
);
777 if (format
->version
== 0 && format
->v1_only_extensions
.nr
) {
781 Q_("repo version is 0, but v1-only extension found:",
782 "repo version is 0, but v1-only extensions found:",
783 format
->v1_only_extensions
.nr
));
785 for (i
= 0; i
< format
->v1_only_extensions
.nr
; i
++)
786 strbuf_addf(err
, "\n\t%s",
787 format
->v1_only_extensions
.items
[i
].string
);
794 void read_gitfile_error_die(int error_code
, const char *path
, const char *dir
)
796 switch (error_code
) {
797 case READ_GITFILE_ERR_STAT_FAILED
:
798 case READ_GITFILE_ERR_NOT_A_FILE
:
799 /* non-fatal; follow return path */
801 case READ_GITFILE_ERR_OPEN_FAILED
:
802 die_errno(_("error opening '%s'"), path
);
803 case READ_GITFILE_ERR_TOO_LARGE
:
804 die(_("too large to be a .git file: '%s'"), path
);
805 case READ_GITFILE_ERR_READ_FAILED
:
806 die(_("error reading %s"), path
);
807 case READ_GITFILE_ERR_INVALID_FORMAT
:
808 die(_("invalid gitfile format: %s"), path
);
809 case READ_GITFILE_ERR_NO_PATH
:
810 die(_("no path in gitfile: %s"), path
);
811 case READ_GITFILE_ERR_NOT_A_REPO
:
812 die(_("not a git repository: %s"), dir
);
814 BUG("unknown error code");
819 * Try to read the location of the git directory from the .git file,
820 * return path to git directory if found. The return value comes from
823 * On failure, if return_error_code is not NULL, return_error_code
824 * will be set to an error code and NULL will be returned. If
825 * return_error_code is NULL the function will die instead (for most
828 const char *read_gitfile_gently(const char *path
, int *return_error_code
)
830 const int max_file_size
= 1 << 20; /* 1MB */
838 static struct strbuf realpath
= STRBUF_INIT
;
840 if (stat(path
, &st
)) {
841 /* NEEDSWORK: discern between ENOENT vs other errors */
842 error_code
= READ_GITFILE_ERR_STAT_FAILED
;
845 if (!S_ISREG(st
.st_mode
)) {
846 error_code
= READ_GITFILE_ERR_NOT_A_FILE
;
849 if (st
.st_size
> max_file_size
) {
850 error_code
= READ_GITFILE_ERR_TOO_LARGE
;
853 fd
= open(path
, O_RDONLY
);
855 error_code
= READ_GITFILE_ERR_OPEN_FAILED
;
858 buf
= xmallocz(st
.st_size
);
859 len
= read_in_full(fd
, buf
, st
.st_size
);
861 if (len
!= st
.st_size
) {
862 error_code
= READ_GITFILE_ERR_READ_FAILED
;
865 if (!starts_with(buf
, "gitdir: ")) {
866 error_code
= READ_GITFILE_ERR_INVALID_FORMAT
;
869 while (buf
[len
- 1] == '\n' || buf
[len
- 1] == '\r')
872 error_code
= READ_GITFILE_ERR_NO_PATH
;
878 if (!is_absolute_path(dir
) && (slash
= strrchr(path
, '/'))) {
879 size_t pathlen
= slash
+1 - path
;
880 dir
= xstrfmt("%.*s%.*s", (int)pathlen
, path
,
881 (int)(len
- 8), buf
+ 8);
885 if (!is_git_directory(dir
)) {
886 error_code
= READ_GITFILE_ERR_NOT_A_REPO
;
890 strbuf_realpath(&realpath
, dir
, 1);
894 if (return_error_code
)
895 *return_error_code
= error_code
;
897 read_gitfile_error_die(error_code
, path
, dir
);
900 return error_code
? NULL
: path
;
903 static const char *setup_explicit_git_dir(const char *gitdirenv
,
905 struct repository_format
*repo_fmt
,
908 const char *work_tree_env
= getenv(GIT_WORK_TREE_ENVIRONMENT
);
909 const char *worktree
;
913 if (PATH_MAX
- 40 < strlen(gitdirenv
))
914 die(_("'$%s' too big"), GIT_DIR_ENVIRONMENT
);
916 gitfile
= (char*)read_gitfile(gitdirenv
);
918 gitfile
= xstrdup(gitfile
);
922 if (!is_git_directory(gitdirenv
)) {
928 die(_("not a git repository: '%s'"), gitdirenv
);
931 if (check_repository_format_gently(gitdirenv
, repo_fmt
, nongit_ok
)) {
936 /* #3, #7, #11, #15, #19, #23, #27, #31 (see t1510) */
938 set_git_work_tree(work_tree_env
);
939 else if (is_bare_repository_cfg
> 0) {
940 if (git_work_tree_cfg
) {
942 warning("core.bare and core.worktree do not make sense");
943 work_tree_config_is_bogus
= 1;
947 set_git_dir(gitdirenv
, 0);
951 else if (git_work_tree_cfg
) { /* #6, #14 */
952 if (is_absolute_path(git_work_tree_cfg
))
953 set_git_work_tree(git_work_tree_cfg
);
956 if (chdir(gitdirenv
))
957 die_errno(_("cannot chdir to '%s'"), gitdirenv
);
958 if (chdir(git_work_tree_cfg
))
959 die_errno(_("cannot chdir to '%s'"), git_work_tree_cfg
);
960 core_worktree
= xgetcwd();
962 die_errno(_("cannot come back to cwd"));
963 set_git_work_tree(core_worktree
);
967 else if (!git_env_bool(GIT_IMPLICIT_WORK_TREE_ENVIRONMENT
, 1)) {
969 set_git_dir(gitdirenv
, 0);
974 set_git_work_tree(".");
976 /* set_git_work_tree() must have been called by now */
977 worktree
= get_git_work_tree();
979 /* both get_git_work_tree() and cwd are already normalized */
980 if (!strcmp(cwd
->buf
, worktree
)) { /* cwd == worktree */
981 set_git_dir(gitdirenv
, 0);
986 offset
= dir_inside_of(cwd
->buf
, worktree
);
987 if (offset
>= 0) { /* cwd inside worktree? */
988 set_git_dir(gitdirenv
, 1);
990 die_errno(_("cannot chdir to '%s'"), worktree
);
991 strbuf_addch(cwd
, '/');
993 return cwd
->buf
+ offset
;
996 /* cwd outside worktree */
997 set_git_dir(gitdirenv
, 0);
1002 static const char *setup_discovered_git_dir(const char *gitdir
,
1003 struct strbuf
*cwd
, int offset
,
1004 struct repository_format
*repo_fmt
,
1007 if (check_repository_format_gently(gitdir
, repo_fmt
, nongit_ok
))
1010 /* --work-tree is set without --git-dir; use discovered one */
1011 if (getenv(GIT_WORK_TREE_ENVIRONMENT
) || git_work_tree_cfg
) {
1012 char *to_free
= NULL
;
1015 if (offset
!= cwd
->len
&& !is_absolute_path(gitdir
))
1016 gitdir
= to_free
= real_pathdup(gitdir
, 1);
1017 if (chdir(cwd
->buf
))
1018 die_errno(_("cannot come back to cwd"));
1019 ret
= setup_explicit_git_dir(gitdir
, cwd
, repo_fmt
, nongit_ok
);
1024 /* #16.2, #17.2, #20.2, #21.2, #24, #25, #28, #29 (see t1510) */
1025 if (is_bare_repository_cfg
> 0) {
1026 set_git_dir(gitdir
, (offset
!= cwd
->len
));
1027 if (chdir(cwd
->buf
))
1028 die_errno(_("cannot come back to cwd"));
1032 /* #0, #1, #5, #8, #9, #12, #13 */
1033 set_git_work_tree(".");
1034 if (strcmp(gitdir
, DEFAULT_GIT_DIR_ENVIRONMENT
))
1035 set_git_dir(gitdir
, 0);
1037 inside_work_tree
= 1;
1038 if (offset
>= cwd
->len
)
1041 /* Make "offset" point past the '/' (already the case for root dirs) */
1042 if (offset
!= offset_1st_component(cwd
->buf
))
1044 /* Add a '/' at the end */
1045 strbuf_addch(cwd
, '/');
1046 return cwd
->buf
+ offset
;
1049 /* #16.1, #17.1, #20.1, #21.1, #22.1 (see t1510) */
1050 static const char *setup_bare_git_dir(struct strbuf
*cwd
, int offset
,
1051 struct repository_format
*repo_fmt
,
1056 if (check_repository_format_gently(".", repo_fmt
, nongit_ok
))
1059 setenv(GIT_IMPLICIT_WORK_TREE_ENVIRONMENT
, "0", 1);
1061 /* --work-tree is set without --git-dir; use discovered one */
1062 if (getenv(GIT_WORK_TREE_ENVIRONMENT
) || git_work_tree_cfg
) {
1063 static const char *gitdir
;
1065 gitdir
= offset
== cwd
->len
? "." : xmemdupz(cwd
->buf
, offset
);
1066 if (chdir(cwd
->buf
))
1067 die_errno(_("cannot come back to cwd"));
1068 return setup_explicit_git_dir(gitdir
, cwd
, repo_fmt
, nongit_ok
);
1072 inside_work_tree
= 0;
1073 if (offset
!= cwd
->len
) {
1074 if (chdir(cwd
->buf
))
1075 die_errno(_("cannot come back to cwd"));
1076 root_len
= offset_1st_component(cwd
->buf
);
1077 strbuf_setlen(cwd
, offset
> root_len
? offset
: root_len
);
1078 set_git_dir(cwd
->buf
, 0);
1081 set_git_dir(".", 0);
1085 static dev_t
get_device_or_die(const char *path
, const char *prefix
, int prefix_len
)
1088 if (stat(path
, &buf
)) {
1089 die_errno(_("failed to stat '%*s%s%s'"),
1091 prefix
? prefix
: "",
1092 prefix
? "/" : "", path
);
1098 * A "string_list_each_func_t" function that canonicalizes an entry
1099 * from GIT_CEILING_DIRECTORIES using real_pathdup(), or
1100 * discards it if unusable. The presence of an empty entry in
1101 * GIT_CEILING_DIRECTORIES turns off canonicalization for all
1102 * subsequent entries.
1104 static int canonicalize_ceiling_entry(struct string_list_item
*item
,
1107 int *empty_entry_found
= cb_data
;
1108 char *ceil
= item
->string
;
1111 *empty_entry_found
= 1;
1113 } else if (!is_absolute_path(ceil
)) {
1115 } else if (*empty_entry_found
) {
1116 /* Keep entry but do not canonicalize it */
1119 char *real_path
= real_pathdup(ceil
, 0);
1124 item
->string
= real_path
;
1129 struct safe_directory_data
{
1134 static int safe_directory_cb(const char *key
, const char *value
,
1135 const struct config_context
*ctx UNUSED
, void *d
)
1137 struct safe_directory_data
*data
= d
;
1139 if (strcmp(key
, "safe.directory"))
1142 if (!value
|| !*value
) {
1144 } else if (!strcmp(value
, "*")) {
1147 const char *interpolated
= NULL
;
1149 if (!git_config_pathname(&interpolated
, key
, value
) &&
1150 !fspathcmp(data
->path
, interpolated
? interpolated
: value
))
1153 free((char *)interpolated
);
1160 * Check if a repository is safe, by verifying the ownership of the
1161 * worktree (if any), the git directory, and the gitfile (if any).
1163 * Exemptions for known-safe repositories can be added via `safe.directory`
1164 * config settings; for non-bare repositories, their worktree needs to be
1165 * added, for bare ones their git directory.
1167 static int ensure_valid_ownership(const char *gitfile
,
1168 const char *worktree
, const char *gitdir
,
1169 struct strbuf
*report
)
1171 struct safe_directory_data data
= {
1172 .path
= worktree
? worktree
: gitdir
1175 if (!git_env_bool("GIT_TEST_ASSUME_DIFFERENT_OWNER", 0) &&
1176 (!gitfile
|| is_path_owned_by_current_user(gitfile
, report
)) &&
1177 (!worktree
|| is_path_owned_by_current_user(worktree
, report
)) &&
1178 (!gitdir
|| is_path_owned_by_current_user(gitdir
, report
)))
1182 * data.path is the "path" that identifies the repository and it is
1183 * constant regardless of what failed above. data.is_safe should be
1184 * initialized to false, and might be changed by the callback.
1186 git_protected_config(safe_directory_cb
, &data
);
1188 return data
.is_safe
;
1191 static int allowed_bare_repo_cb(const char *key
, const char *value
,
1192 const struct config_context
*ctx UNUSED
,
1195 enum allowed_bare_repo
*allowed_bare_repo
= d
;
1197 if (strcasecmp(key
, "safe.bareRepository"))
1200 if (!strcmp(value
, "explicit")) {
1201 *allowed_bare_repo
= ALLOWED_BARE_REPO_EXPLICIT
;
1204 if (!strcmp(value
, "all")) {
1205 *allowed_bare_repo
= ALLOWED_BARE_REPO_ALL
;
1211 static enum allowed_bare_repo
get_allowed_bare_repo(void)
1213 enum allowed_bare_repo result
= ALLOWED_BARE_REPO_ALL
;
1214 git_protected_config(allowed_bare_repo_cb
, &result
);
1218 static const char *allowed_bare_repo_to_string(
1219 enum allowed_bare_repo allowed_bare_repo
)
1221 switch (allowed_bare_repo
) {
1222 case ALLOWED_BARE_REPO_EXPLICIT
:
1224 case ALLOWED_BARE_REPO_ALL
:
1227 BUG("invalid allowed_bare_repo %d",
1234 * We cannot decide in this function whether we are in the work tree or
1235 * not, since the config can only be read _after_ this function was called.
1237 * Also, we avoid changing any global state (such as the current working
1238 * directory) to allow early callers.
1240 * The directory where the search should start needs to be passed in via the
1241 * `dir` parameter; upon return, the `dir` buffer will contain the path of
1242 * the directory where the search ended, and `gitdir` will contain the path of
1243 * the discovered .git/ directory, if any. If `gitdir` is not absolute, it
1244 * is relative to `dir` (i.e. *not* necessarily the cwd).
1246 static enum discovery_result
setup_git_directory_gently_1(struct strbuf
*dir
,
1247 struct strbuf
*gitdir
,
1248 struct strbuf
*report
,
1251 const char *env_ceiling_dirs
= getenv(CEILING_DIRECTORIES_ENVIRONMENT
);
1252 struct string_list ceiling_dirs
= STRING_LIST_INIT_DUP
;
1253 const char *gitdirenv
;
1254 int ceil_offset
= -1, min_offset
= offset_1st_component(dir
->buf
);
1255 dev_t current_device
= 0;
1256 int one_filesystem
= 1;
1259 * If GIT_DIR is set explicitly, we're not going
1260 * to do any discovery, but we still do repository
1263 gitdirenv
= getenv(GIT_DIR_ENVIRONMENT
);
1265 strbuf_addstr(gitdir
, gitdirenv
);
1266 return GIT_DIR_EXPLICIT
;
1269 if (env_ceiling_dirs
) {
1270 int empty_entry_found
= 0;
1272 string_list_split(&ceiling_dirs
, env_ceiling_dirs
, PATH_SEP
, -1);
1273 filter_string_list(&ceiling_dirs
, 0,
1274 canonicalize_ceiling_entry
, &empty_entry_found
);
1275 ceil_offset
= longest_ancestor_length(dir
->buf
, &ceiling_dirs
);
1276 string_list_clear(&ceiling_dirs
, 0);
1279 if (ceil_offset
< 0)
1280 ceil_offset
= min_offset
- 2;
1282 if (min_offset
&& min_offset
== dir
->len
&&
1283 !is_dir_sep(dir
->buf
[min_offset
- 1])) {
1284 strbuf_addch(dir
, '/');
1289 * Test in the following order (relative to the dir):
1290 * - .git (file containing "gitdir: <path>")
1299 one_filesystem
= !git_env_bool("GIT_DISCOVERY_ACROSS_FILESYSTEM", 0);
1301 current_device
= get_device_or_die(dir
->buf
, NULL
, 0);
1303 int offset
= dir
->len
, error_code
= 0;
1304 char *gitdir_path
= NULL
;
1305 char *gitfile
= NULL
;
1307 if (offset
> min_offset
)
1308 strbuf_addch(dir
, '/');
1309 strbuf_addstr(dir
, DEFAULT_GIT_DIR_ENVIRONMENT
);
1310 gitdirenv
= read_gitfile_gently(dir
->buf
, die_on_error
?
1311 NULL
: &error_code
);
1314 error_code
== READ_GITFILE_ERR_NOT_A_FILE
) {
1315 /* NEEDSWORK: fail if .git is not file nor dir */
1316 if (is_git_directory(dir
->buf
)) {
1317 gitdirenv
= DEFAULT_GIT_DIR_ENVIRONMENT
;
1318 gitdir_path
= xstrdup(dir
->buf
);
1320 } else if (error_code
!= READ_GITFILE_ERR_STAT_FAILED
)
1321 return GIT_DIR_INVALID_GITFILE
;
1323 gitfile
= xstrdup(dir
->buf
);
1325 * Earlier, we tentatively added DEFAULT_GIT_DIR_ENVIRONMENT
1326 * to check that directory for a repository.
1327 * Now trim that tentative addition away, because we want to
1328 * focus on the real directory we are in.
1330 strbuf_setlen(dir
, offset
);
1332 enum discovery_result ret
;
1333 const char *gitdir_candidate
=
1334 gitdir_path
? gitdir_path
: gitdirenv
;
1336 if (ensure_valid_ownership(gitfile
, dir
->buf
,
1337 gitdir_candidate
, report
)) {
1338 strbuf_addstr(gitdir
, gitdirenv
);
1339 ret
= GIT_DIR_DISCOVERED
;
1341 ret
= GIT_DIR_INVALID_OWNERSHIP
;
1344 * Earlier, during discovery, we might have allocated
1345 * string copies for gitdir_path or gitfile so make
1346 * sure we don't leak by freeing them now, before
1347 * leaving the loop and function.
1349 * Note: gitdirenv will be non-NULL whenever these are
1350 * allocated, therefore we need not take care of releasing
1351 * them outside of this conditional block.
1359 if (is_git_directory(dir
->buf
)) {
1360 trace2_data_string("setup", NULL
, "implicit-bare-repository", dir
->buf
);
1361 if (get_allowed_bare_repo() == ALLOWED_BARE_REPO_EXPLICIT
)
1362 return GIT_DIR_DISALLOWED_BARE
;
1363 if (!ensure_valid_ownership(NULL
, NULL
, dir
->buf
, report
))
1364 return GIT_DIR_INVALID_OWNERSHIP
;
1365 strbuf_addstr(gitdir
, ".");
1366 return GIT_DIR_BARE
;
1369 if (offset
<= min_offset
)
1370 return GIT_DIR_HIT_CEILING
;
1372 while (--offset
> ceil_offset
&& !is_dir_sep(dir
->buf
[offset
]))
1374 if (offset
<= ceil_offset
)
1375 return GIT_DIR_HIT_CEILING
;
1377 strbuf_setlen(dir
, offset
> min_offset
? offset
: min_offset
);
1378 if (one_filesystem
&&
1379 current_device
!= get_device_or_die(dir
->buf
, NULL
, offset
))
1380 return GIT_DIR_HIT_MOUNT_POINT
;
1384 enum discovery_result
discover_git_directory_reason(struct strbuf
*commondir
,
1385 struct strbuf
*gitdir
)
1387 struct strbuf dir
= STRBUF_INIT
, err
= STRBUF_INIT
;
1388 size_t gitdir_offset
= gitdir
->len
, cwd_len
;
1389 size_t commondir_offset
= commondir
->len
;
1390 struct repository_format candidate
= REPOSITORY_FORMAT_INIT
;
1391 enum discovery_result result
;
1393 if (strbuf_getcwd(&dir
))
1394 return GIT_DIR_CWD_FAILURE
;
1397 result
= setup_git_directory_gently_1(&dir
, gitdir
, NULL
, 0);
1399 strbuf_release(&dir
);
1404 * The returned gitdir is relative to dir, and if dir does not reflect
1405 * the current working directory, we simply make the gitdir absolute.
1407 if (dir
.len
< cwd_len
&& !is_absolute_path(gitdir
->buf
+ gitdir_offset
)) {
1408 /* Avoid a trailing "/." */
1409 if (!strcmp(".", gitdir
->buf
+ gitdir_offset
))
1410 strbuf_setlen(gitdir
, gitdir_offset
);
1412 strbuf_addch(&dir
, '/');
1413 strbuf_insert(gitdir
, gitdir_offset
, dir
.buf
, dir
.len
);
1416 get_common_dir(commondir
, gitdir
->buf
+ gitdir_offset
);
1419 strbuf_addf(&dir
, "%s/config", commondir
->buf
+ commondir_offset
);
1420 read_repository_format(&candidate
, dir
.buf
);
1421 strbuf_release(&dir
);
1423 if (verify_repository_format(&candidate
, &err
) < 0) {
1424 warning("ignoring git dir '%s': %s",
1425 gitdir
->buf
+ gitdir_offset
, err
.buf
);
1426 strbuf_release(&err
);
1427 strbuf_setlen(commondir
, commondir_offset
);
1428 strbuf_setlen(gitdir
, gitdir_offset
);
1429 clear_repository_format(&candidate
);
1430 return GIT_DIR_INVALID_FORMAT
;
1433 clear_repository_format(&candidate
);
1437 const char *setup_git_directory_gently(int *nongit_ok
)
1439 static struct strbuf cwd
= STRBUF_INIT
;
1440 struct strbuf dir
= STRBUF_INIT
, gitdir
= STRBUF_INIT
, report
= STRBUF_INIT
;
1441 const char *prefix
= NULL
;
1442 struct repository_format repo_fmt
= REPOSITORY_FORMAT_INIT
;
1445 * We may have read an incomplete configuration before
1446 * setting-up the git directory. If so, clear the cache so
1447 * that the next queries to the configuration reload complete
1448 * configuration (including the per-repo config file that we
1449 * ignored previously).
1454 * Let's assume that we are in a git repository.
1455 * If it turns out later that we are somewhere else, the value will be
1456 * updated accordingly.
1461 if (strbuf_getcwd(&cwd
))
1462 die_errno(_("Unable to read current working directory"));
1463 strbuf_addbuf(&dir
, &cwd
);
1465 switch (setup_git_directory_gently_1(&dir
, &gitdir
, &report
, 1)) {
1466 case GIT_DIR_EXPLICIT
:
1467 prefix
= setup_explicit_git_dir(gitdir
.buf
, &cwd
, &repo_fmt
, nongit_ok
);
1469 case GIT_DIR_DISCOVERED
:
1470 if (dir
.len
< cwd
.len
&& chdir(dir
.buf
))
1471 die(_("cannot change to '%s'"), dir
.buf
);
1472 prefix
= setup_discovered_git_dir(gitdir
.buf
, &cwd
, dir
.len
,
1473 &repo_fmt
, nongit_ok
);
1476 if (dir
.len
< cwd
.len
&& chdir(dir
.buf
))
1477 die(_("cannot change to '%s'"), dir
.buf
);
1478 prefix
= setup_bare_git_dir(&cwd
, dir
.len
, &repo_fmt
, nongit_ok
);
1480 case GIT_DIR_HIT_CEILING
:
1482 die(_("not a git repository (or any of the parent directories): %s"),
1483 DEFAULT_GIT_DIR_ENVIRONMENT
);
1486 case GIT_DIR_HIT_MOUNT_POINT
:
1488 die(_("not a git repository (or any parent up to mount point %s)\n"
1489 "Stopping at filesystem boundary (GIT_DISCOVERY_ACROSS_FILESYSTEM not set)."),
1493 case GIT_DIR_INVALID_OWNERSHIP
:
1495 struct strbuf quoted
= STRBUF_INIT
;
1497 strbuf_complete(&report
, '\n');
1498 sq_quote_buf_pretty("ed
, dir
.buf
);
1499 die(_("detected dubious ownership in repository at '%s'\n"
1501 "To add an exception for this directory, call:\n"
1503 "\tgit config --global --add safe.directory %s"),
1504 dir
.buf
, report
.buf
, quoted
.buf
);
1508 case GIT_DIR_DISALLOWED_BARE
:
1510 die(_("cannot use bare repository '%s' (safe.bareRepository is '%s')"),
1512 allowed_bare_repo_to_string(get_allowed_bare_repo()));
1516 case GIT_DIR_CWD_FAILURE
:
1517 case GIT_DIR_INVALID_FORMAT
:
1519 * As a safeguard against setup_git_directory_gently_1 returning
1520 * these values, fallthrough to BUG. Otherwise it is possible to
1521 * set startup_info->have_repository to 1 when we did nothing to
1522 * find a repository.
1525 BUG("unhandled setup_git_directory_gently_1() result");
1529 * At this point, nongit_ok is stable. If it is non-NULL and points
1530 * to a non-zero value, then this means that we haven't found a
1531 * repository and that the caller expects startup_info to reflect
1534 * Regardless of the state of nongit_ok, startup_info->prefix and
1535 * the GIT_PREFIX environment variable must always match. For details
1536 * see Documentation/config/alias.txt.
1538 if (nongit_ok
&& *nongit_ok
)
1539 startup_info
->have_repository
= 0;
1541 startup_info
->have_repository
= 1;
1544 * Not all paths through the setup code will call 'set_git_dir()' (which
1545 * directly sets up the environment) so in order to guarantee that the
1546 * environment is in a consistent state after setup, explicitly setup
1547 * the environment if we have a repository.
1549 * NEEDSWORK: currently we allow bogus GIT_DIR values to be set in some
1550 * code paths so we also need to explicitly setup the environment if
1551 * the user has set GIT_DIR. It may be beneficial to disallow bogus
1552 * GIT_DIR values at some point in the future.
1554 if (/* GIT_DIR_EXPLICIT, GIT_DIR_DISCOVERED, GIT_DIR_BARE */
1555 startup_info
->have_repository
||
1556 /* GIT_DIR_EXPLICIT */
1557 getenv(GIT_DIR_ENVIRONMENT
)) {
1558 if (!the_repository
->gitdir
) {
1559 const char *gitdir
= getenv(GIT_DIR_ENVIRONMENT
);
1561 gitdir
= DEFAULT_GIT_DIR_ENVIRONMENT
;
1562 setup_git_env(gitdir
);
1564 if (startup_info
->have_repository
) {
1565 repo_set_hash_algo(the_repository
, repo_fmt
.hash_algo
);
1566 the_repository
->repository_format_worktree_config
=
1567 repo_fmt
.worktree_config
;
1568 /* take ownership of repo_fmt.partial_clone */
1569 the_repository
->repository_format_partial_clone
=
1570 repo_fmt
.partial_clone
;
1571 repo_fmt
.partial_clone
= NULL
;
1575 * Since precompose_string_if_needed() needs to look at
1576 * the core.precomposeunicode configuration, this
1577 * has to happen after the above block that finds
1578 * out where the repository is, i.e. a preparation
1579 * for calling git_config_get_bool().
1582 prefix
= precompose_string_if_needed(prefix
);
1583 startup_info
->prefix
= prefix
;
1584 setenv(GIT_PREFIX_ENVIRONMENT
, prefix
, 1);
1586 startup_info
->prefix
= NULL
;
1587 setenv(GIT_PREFIX_ENVIRONMENT
, "", 1);
1590 setup_original_cwd();
1592 strbuf_release(&dir
);
1593 strbuf_release(&gitdir
);
1594 strbuf_release(&report
);
1595 clear_repository_format(&repo_fmt
);
1600 int git_config_perm(const char *var
, const char *value
)
1608 if (!strcmp(value
, "umask"))
1610 if (!strcmp(value
, "group"))
1612 if (!strcmp(value
, "all") ||
1613 !strcmp(value
, "world") ||
1614 !strcmp(value
, "everybody"))
1615 return PERM_EVERYBODY
;
1617 /* Parse octal numbers */
1618 i
= strtol(value
, &endptr
, 8);
1620 /* If not an octal number, maybe true/false? */
1622 return git_config_bool(var
, value
) ? PERM_GROUP
: PERM_UMASK
;
1625 * Treat values 0, 1 and 2 as compatibility cases, otherwise it is
1626 * a chmod value to restrict to.
1629 case PERM_UMASK
: /* 0 */
1631 case OLD_PERM_GROUP
: /* 1 */
1633 case OLD_PERM_EVERYBODY
: /* 2 */
1634 return PERM_EVERYBODY
;
1637 /* A filemode value was given: 0xxx */
1639 if ((i
& 0600) != 0600)
1640 die(_("problem with core.sharedRepository filemode value "
1641 "(0%.3o).\nThe owner of files must always have "
1642 "read and write permissions."), i
);
1645 * Mask filemode value. Others can not get write permission.
1646 * x flags for directories are handled separately.
1651 void check_repository_format(struct repository_format
*fmt
)
1653 struct repository_format repo_fmt
= REPOSITORY_FORMAT_INIT
;
1656 check_repository_format_gently(get_git_dir(), fmt
, NULL
);
1657 startup_info
->have_repository
= 1;
1658 repo_set_hash_algo(the_repository
, fmt
->hash_algo
);
1659 the_repository
->repository_format_worktree_config
=
1660 fmt
->worktree_config
;
1661 the_repository
->repository_format_partial_clone
=
1662 xstrdup_or_null(fmt
->partial_clone
);
1663 clear_repository_format(&repo_fmt
);
1667 * Returns the "prefix", a path to the current working directory
1668 * relative to the work tree root, or NULL, if the current working
1669 * directory is not a strict subdirectory of the work tree root. The
1670 * prefix always ends with a '/' character.
1672 const char *setup_git_directory(void)
1674 return setup_git_directory_gently(NULL
);
1677 const char *resolve_gitdir_gently(const char *suspect
, int *return_error_code
)
1679 if (is_git_directory(suspect
))
1681 return read_gitfile_gently(suspect
, return_error_code
);
1684 /* if any standard file descriptor is missing open it to /dev/null */
1685 void sanitize_stdfds(void)
1687 int fd
= xopen("/dev/null", O_RDWR
);
1696 #ifdef NO_POSIX_GOODIES
1704 die_errno(_("fork failed"));
1709 die_errno(_("setsid failed"));
1718 #ifdef NO_TRUSTABLE_FILEMODE
1719 #define TEST_FILEMODE 0
1721 #define TEST_FILEMODE 1
1724 #define GIT_DEFAULT_HASH_ENVIRONMENT "GIT_DEFAULT_HASH"
1726 static void copy_templates_1(struct strbuf
*path
, struct strbuf
*template_path
,
1729 size_t path_baselen
= path
->len
;
1730 size_t template_baselen
= template_path
->len
;
1733 /* Note: if ".git/hooks" file exists in the repository being
1734 * re-initialized, /etc/core-git/templates/hooks/update would
1735 * cause "git init" to fail here. I think this is sane but
1736 * it means that the set of templates we ship by default, along
1737 * with the way the namespace under .git/ is organized, should
1738 * be really carefully chosen.
1740 safe_create_dir(path
->buf
, 1);
1741 while ((de
= readdir(dir
)) != NULL
) {
1742 struct stat st_git
, st_template
;
1745 strbuf_setlen(path
, path_baselen
);
1746 strbuf_setlen(template_path
, template_baselen
);
1748 if (de
->d_name
[0] == '.')
1750 strbuf_addstr(path
, de
->d_name
);
1751 strbuf_addstr(template_path
, de
->d_name
);
1752 if (lstat(path
->buf
, &st_git
)) {
1753 if (errno
!= ENOENT
)
1754 die_errno(_("cannot stat '%s'"), path
->buf
);
1759 if (lstat(template_path
->buf
, &st_template
))
1760 die_errno(_("cannot stat template '%s'"), template_path
->buf
);
1762 if (S_ISDIR(st_template
.st_mode
)) {
1763 DIR *subdir
= opendir(template_path
->buf
);
1765 die_errno(_("cannot opendir '%s'"), template_path
->buf
);
1766 strbuf_addch(path
, '/');
1767 strbuf_addch(template_path
, '/');
1768 copy_templates_1(path
, template_path
, subdir
);
1773 else if (S_ISLNK(st_template
.st_mode
)) {
1774 struct strbuf lnk
= STRBUF_INIT
;
1775 if (strbuf_readlink(&lnk
, template_path
->buf
,
1776 st_template
.st_size
) < 0)
1777 die_errno(_("cannot readlink '%s'"), template_path
->buf
);
1778 if (symlink(lnk
.buf
, path
->buf
))
1779 die_errno(_("cannot symlink '%s' '%s'"),
1780 lnk
.buf
, path
->buf
);
1781 strbuf_release(&lnk
);
1783 else if (S_ISREG(st_template
.st_mode
)) {
1784 if (copy_file(path
->buf
, template_path
->buf
, st_template
.st_mode
))
1785 die_errno(_("cannot copy '%s' to '%s'"),
1786 template_path
->buf
, path
->buf
);
1789 error(_("ignoring template %s"), template_path
->buf
);
1793 static void copy_templates(const char *template_dir
, const char *init_template_dir
)
1795 struct strbuf path
= STRBUF_INIT
;
1796 struct strbuf template_path
= STRBUF_INIT
;
1797 size_t template_len
;
1798 struct repository_format template_format
= REPOSITORY_FORMAT_INIT
;
1799 struct strbuf err
= STRBUF_INIT
;
1801 char *to_free
= NULL
;
1804 template_dir
= getenv(TEMPLATE_DIR_ENVIRONMENT
);
1806 template_dir
= init_template_dir
;
1808 template_dir
= to_free
= system_path(DEFAULT_GIT_TEMPLATE_DIR
);
1809 if (!template_dir
[0]) {
1814 strbuf_addstr(&template_path
, template_dir
);
1815 strbuf_complete(&template_path
, '/');
1816 template_len
= template_path
.len
;
1818 dir
= opendir(template_path
.buf
);
1820 warning(_("templates not found in %s"), template_dir
);
1824 /* Make sure that template is from the correct vintage */
1825 strbuf_addstr(&template_path
, "config");
1826 read_repository_format(&template_format
, template_path
.buf
);
1827 strbuf_setlen(&template_path
, template_len
);
1830 * No mention of version at all is OK, but anything else should be
1833 if (template_format
.version
>= 0 &&
1834 verify_repository_format(&template_format
, &err
) < 0) {
1835 warning(_("not copying templates from '%s': %s"),
1836 template_dir
, err
.buf
);
1837 strbuf_release(&err
);
1838 goto close_free_return
;
1841 strbuf_addstr(&path
, get_git_common_dir());
1842 strbuf_complete(&path
, '/');
1843 copy_templates_1(&path
, &template_path
, dir
);
1848 strbuf_release(&path
);
1849 strbuf_release(&template_path
);
1850 clear_repository_format(&template_format
);
1854 * If the git_dir is not directly inside the working tree, then git will not
1855 * find it by default, and we need to set the worktree explicitly.
1857 static int needs_work_tree_config(const char *git_dir
, const char *work_tree
)
1859 if (!strcmp(work_tree
, "/") && !strcmp(git_dir
, "/.git"))
1861 if (skip_prefix(git_dir
, work_tree
, &git_dir
) &&
1862 !strcmp(git_dir
, "/.git"))
1867 void initialize_repository_version(int hash_algo
, int reinit
)
1869 char repo_version_string
[10];
1870 int repo_version
= GIT_REPO_VERSION
;
1872 if (hash_algo
!= GIT_HASH_SHA1
)
1873 repo_version
= GIT_REPO_VERSION_READ
;
1875 /* This forces creation of new config file */
1876 xsnprintf(repo_version_string
, sizeof(repo_version_string
),
1877 "%d", repo_version
);
1878 git_config_set("core.repositoryformatversion", repo_version_string
);
1880 if (hash_algo
!= GIT_HASH_SHA1
)
1881 git_config_set("extensions.objectformat",
1882 hash_algos
[hash_algo
].name
);
1884 git_config_set_gently("extensions.objectformat", NULL
);
1887 static int create_default_files(const char *template_path
,
1888 const char *original_git_dir
,
1889 const char *initial_branch
,
1890 const struct repository_format
*fmt
,
1891 int prev_bare_repository
,
1892 int init_shared_repository
,
1896 struct strbuf buf
= STRBUF_INIT
;
1901 struct strbuf err
= STRBUF_INIT
;
1902 const char *init_template_dir
= NULL
;
1903 const char *work_tree
= get_git_work_tree();
1906 * First copy the templates -- we might have the default
1907 * config file there, in which case we would want to read
1908 * from it after installing.
1910 * Before reading that config, we also need to clear out any cached
1911 * values (since we've just potentially changed what's available on
1914 git_config_get_pathname("init.templatedir", &init_template_dir
);
1915 copy_templates(template_path
, init_template_dir
);
1916 free((char *)init_template_dir
);
1918 reset_shared_repository();
1919 git_config(git_default_config
, NULL
);
1922 * We must make sure command-line options continue to override any
1923 * values we might have just re-read from the config.
1925 if (init_shared_repository
!= -1)
1926 set_shared_repository(init_shared_repository
);
1928 * TODO: heed core.bare from config file in templates if no
1929 * command-line override given
1931 is_bare_repository_cfg
= prev_bare_repository
|| !work_tree
;
1932 /* TODO (continued):
1934 * Unfortunately, the line above is equivalent to
1935 * is_bare_repository_cfg = !work_tree;
1936 * which ignores the config entirely even if no `--[no-]bare`
1937 * command line option was present.
1939 * To see why, note that before this function, there was this call:
1940 * prev_bare_repository = is_bare_repository()
1941 * expanding the right hand side:
1942 * = is_bare_repository_cfg && !get_git_work_tree()
1943 * = is_bare_repository_cfg && !work_tree
1944 * note that the last simplification above is valid because nothing
1945 * calls repo_init() or set_git_work_tree() between any of the
1946 * relevant calls in the code, and thus the !get_git_work_tree()
1947 * calls will return the same result each time. So, what we are
1948 * interested in computing is the right hand side of the line of
1949 * code just above this comment:
1950 * prev_bare_repository || !work_tree
1951 * = is_bare_repository_cfg && !work_tree || !work_tree
1953 * because "A && !B || !B == !B" for all boolean values of A & B.
1957 * We would have created the above under user's umask -- under
1958 * shared-repository settings, we would need to fix them up.
1960 if (get_shared_repository()) {
1961 adjust_shared_perm(get_git_dir());
1965 * We need to create a "refs" dir in any case so that older
1966 * versions of git can tell that this is a repository.
1968 safe_create_dir(git_path("refs"), 1);
1969 adjust_shared_perm(git_path("refs"));
1971 if (refs_init_db(&err
))
1972 die("failed to set up refs db: %s", err
.buf
);
1975 * Point the HEAD symref to the initial branch with if HEAD does
1978 path
= git_path_buf(&buf
, "HEAD");
1979 reinit
= (!access(path
, R_OK
)
1980 || readlink(path
, junk
, sizeof(junk
)-1) != -1);
1984 if (!initial_branch
)
1985 initial_branch
= git_default_branch_name(quiet
);
1987 ref
= xstrfmt("refs/heads/%s", initial_branch
);
1988 if (check_refname_format(ref
, 0) < 0)
1989 die(_("invalid initial branch name: '%s'"),
1992 if (create_symref("HEAD", ref
, NULL
) < 0)
1997 initialize_repository_version(fmt
->hash_algo
, 0);
1999 /* Check filemode trustability */
2000 path
= git_path_buf(&buf
, "config");
2001 filemode
= TEST_FILEMODE
;
2002 if (TEST_FILEMODE
&& !lstat(path
, &st1
)) {
2004 filemode
= (!chmod(path
, st1
.st_mode
^ S_IXUSR
) &&
2005 !lstat(path
, &st2
) &&
2006 st1
.st_mode
!= st2
.st_mode
&&
2007 !chmod(path
, st1
.st_mode
));
2008 if (filemode
&& !reinit
&& (st1
.st_mode
& S_IXUSR
))
2011 git_config_set("core.filemode", filemode
? "true" : "false");
2013 if (is_bare_repository())
2014 git_config_set("core.bare", "true");
2016 git_config_set("core.bare", "false");
2017 /* allow template config file to override the default */
2018 if (log_all_ref_updates
== LOG_REFS_UNSET
)
2019 git_config_set("core.logallrefupdates", "true");
2020 if (needs_work_tree_config(original_git_dir
, work_tree
))
2021 git_config_set("core.worktree", work_tree
);
2025 /* Check if symlink is supported in the work tree */
2026 path
= git_path_buf(&buf
, "tXXXXXX");
2027 if (!close(xmkstemp(path
)) &&
2029 !symlink("testing", path
) &&
2030 !lstat(path
, &st1
) &&
2031 S_ISLNK(st1
.st_mode
))
2032 unlink(path
); /* good */
2034 git_config_set("core.symlinks", "false");
2036 /* Check if the filesystem is case-insensitive */
2037 path
= git_path_buf(&buf
, "CoNfIg");
2038 if (!access(path
, F_OK
))
2039 git_config_set("core.ignorecase", "true");
2040 probe_utf8_pathname_composition();
2043 strbuf_release(&buf
);
2047 static void create_object_directory(void)
2049 struct strbuf path
= STRBUF_INIT
;
2052 strbuf_addstr(&path
, get_object_directory());
2055 safe_create_dir(path
.buf
, 1);
2057 strbuf_setlen(&path
, baselen
);
2058 strbuf_addstr(&path
, "/pack");
2059 safe_create_dir(path
.buf
, 1);
2061 strbuf_setlen(&path
, baselen
);
2062 strbuf_addstr(&path
, "/info");
2063 safe_create_dir(path
.buf
, 1);
2065 strbuf_release(&path
);
2068 static void separate_git_dir(const char *git_dir
, const char *git_link
)
2072 if (!stat(git_link
, &st
)) {
2075 if (S_ISREG(st
.st_mode
))
2076 src
= read_gitfile(git_link
);
2077 else if (S_ISDIR(st
.st_mode
))
2080 die(_("unable to handle file type %d"), (int)st
.st_mode
);
2082 if (rename(src
, git_dir
))
2083 die_errno(_("unable to move %s to %s"), src
, git_dir
);
2084 repair_worktrees(NULL
, NULL
);
2087 write_file(git_link
, "gitdir: %s", git_dir
);
2090 static void validate_hash_algorithm(struct repository_format
*repo_fmt
, int hash
)
2092 const char *env
= getenv(GIT_DEFAULT_HASH_ENVIRONMENT
);
2094 * If we already have an initialized repo, don't allow the user to
2095 * specify a different algorithm, as that could cause corruption.
2096 * Otherwise, if the user has specified one on the command line, use it.
2098 if (repo_fmt
->version
>= 0 && hash
!= GIT_HASH_UNKNOWN
&& hash
!= repo_fmt
->hash_algo
)
2099 die(_("attempt to reinitialize repository with different hash"));
2100 else if (hash
!= GIT_HASH_UNKNOWN
)
2101 repo_fmt
->hash_algo
= hash
;
2103 int env_algo
= hash_algo_by_name(env
);
2104 if (env_algo
== GIT_HASH_UNKNOWN
)
2105 die(_("unknown hash algorithm '%s'"), env
);
2106 repo_fmt
->hash_algo
= env_algo
;
2110 int init_db(const char *git_dir
, const char *real_git_dir
,
2111 const char *template_dir
, int hash
, const char *initial_branch
,
2112 int init_shared_repository
, unsigned int flags
)
2115 int exist_ok
= flags
& INIT_DB_EXIST_OK
;
2116 char *original_git_dir
= real_pathdup(git_dir
, 1);
2117 struct repository_format repo_fmt
= REPOSITORY_FORMAT_INIT
;
2118 int prev_bare_repository
;
2123 if (!exist_ok
&& !stat(git_dir
, &st
))
2124 die(_("%s already exists"), git_dir
);
2126 if (!exist_ok
&& !stat(real_git_dir
, &st
))
2127 die(_("%s already exists"), real_git_dir
);
2129 set_git_dir(real_git_dir
, 1);
2130 git_dir
= get_git_dir();
2131 separate_git_dir(git_dir
, original_git_dir
);
2134 set_git_dir(git_dir
, 1);
2135 git_dir
= get_git_dir();
2137 startup_info
->have_repository
= 1;
2139 /* Ensure `core.hidedotfiles` is processed */
2140 git_config(platform_core_config
, NULL
);
2142 safe_create_dir(git_dir
, 0);
2144 prev_bare_repository
= is_bare_repository();
2146 /* Check to see if the repository version is right.
2147 * Note that a newly created repository does not have
2148 * config file, so this will not fail. What we are catching
2149 * is an attempt to reinitialize new repository with an old tool.
2151 check_repository_format(&repo_fmt
);
2153 validate_hash_algorithm(&repo_fmt
, hash
);
2155 reinit
= create_default_files(template_dir
, original_git_dir
,
2156 initial_branch
, &repo_fmt
,
2157 prev_bare_repository
,
2158 init_shared_repository
,
2159 flags
& INIT_DB_QUIET
);
2160 if (reinit
&& initial_branch
)
2161 warning(_("re-init: ignored --initial-branch=%s"),
2164 create_object_directory();
2166 if (get_shared_repository()) {
2168 /* We do not spell "group" and such, so that
2169 * the configuration can be read by older version
2170 * of git. Note, we use octal numbers for new share modes,
2171 * and compatibility values for PERM_GROUP and
2174 if (get_shared_repository() < 0)
2175 /* force to the mode value */
2176 xsnprintf(buf
, sizeof(buf
), "0%o", -get_shared_repository());
2177 else if (get_shared_repository() == PERM_GROUP
)
2178 xsnprintf(buf
, sizeof(buf
), "%d", OLD_PERM_GROUP
);
2179 else if (get_shared_repository() == PERM_EVERYBODY
)
2180 xsnprintf(buf
, sizeof(buf
), "%d", OLD_PERM_EVERYBODY
);
2182 BUG("invalid value for shared_repository");
2183 git_config_set("core.sharedrepository", buf
);
2184 git_config_set("receive.denyNonFastforwards", "true");
2187 if (!(flags
& INIT_DB_QUIET
)) {
2188 int len
= strlen(git_dir
);
2191 printf(get_shared_repository()
2192 ? _("Reinitialized existing shared Git repository in %s%s\n")
2193 : _("Reinitialized existing Git repository in %s%s\n"),
2194 git_dir
, len
&& git_dir
[len
-1] != '/' ? "/" : "");
2196 printf(get_shared_repository()
2197 ? _("Initialized empty shared Git repository in %s%s\n")
2198 : _("Initialized empty Git repository in %s%s\n"),
2199 git_dir
, len
&& git_dir
[len
-1] != '/' ? "/" : "");
2202 clear_repository_format(&repo_fmt
);
2203 free(original_git_dir
);