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"
21 static int inside_git_dir
= -1;
22 static int inside_work_tree
= -1;
23 static int work_tree_config_is_bogus
;
24 enum allowed_bare_repo
{
25 ALLOWED_BARE_REPO_EXPLICIT
= 0,
26 ALLOWED_BARE_REPO_ALL
,
29 static struct startup_info the_startup_info
;
30 struct startup_info
*startup_info
= &the_startup_info
;
31 const char *tmp_original_cwd
;
34 * The input parameter must contain an absolute path, and it must already be
37 * Find the part of an absolute path that lies inside the work tree by
38 * dereferencing symlinks outside the work tree, for example:
39 * /dir1/repo/dir2/file (work tree is /dir1/repo) -> dir2/file
40 * /dir/file (work tree is /) -> dir/file
41 * /dir/symlink1/symlink2 (symlink1 points to work tree) -> symlink2
42 * /dir/repolink/file (repolink points to /dir/repo) -> file
43 * /dir/repo (exactly equal to work tree) -> (empty string)
45 static int abspath_part_inside_repo(char *path
)
51 const char *work_tree
= get_git_work_tree();
52 struct strbuf realpath
= STRBUF_INIT
;
56 wtlen
= strlen(work_tree
);
58 off
= offset_1st_component(path
);
60 /* check if work tree is already the prefix */
61 if (wtlen
<= len
&& !fspathncmp(path
, work_tree
, wtlen
)) {
62 if (path
[wtlen
] == '/') {
63 memmove(path
, path
+ wtlen
+ 1, len
- wtlen
);
65 } else if (path
[wtlen
- 1] == '/' || path
[wtlen
] == '\0') {
66 /* work tree is the root, or the whole path */
67 memmove(path
, path
+ wtlen
, len
- wtlen
+ 1);
70 /* work tree might match beginning of a symlink to work tree */
76 /* check each '/'-terminated level */
81 strbuf_realpath(&realpath
, path0
, 1);
82 if (fspathcmp(realpath
.buf
, work_tree
) == 0) {
83 memmove(path0
, path
+ 1, len
- (path
- path0
));
84 strbuf_release(&realpath
);
91 /* check whole path */
92 strbuf_realpath(&realpath
, path0
, 1);
93 if (fspathcmp(realpath
.buf
, work_tree
) == 0) {
95 strbuf_release(&realpath
);
99 strbuf_release(&realpath
);
104 * Normalize "path", prepending the "prefix" for relative paths. If
105 * remaining_prefix is not NULL, return the actual prefix still
106 * remains in the path. For example, prefix = sub1/sub2/ and path is
108 * foo -> sub1/sub2/foo (full prefix)
109 * ../foo -> sub1/foo (remaining prefix is sub1/)
110 * ../../bar -> bar (no remaining prefix)
111 * ../../sub1/sub2/foo -> sub1/sub2/foo (but no remaining prefix)
112 * `pwd`/../bar -> sub1/bar (no remaining prefix)
114 char *prefix_path_gently(const char *prefix
, int len
,
115 int *remaining_prefix
, const char *path
)
117 const char *orig
= path
;
119 if (is_absolute_path(orig
)) {
120 sanitized
= xmallocz(strlen(path
));
121 if (remaining_prefix
)
122 *remaining_prefix
= 0;
123 if (normalize_path_copy_len(sanitized
, path
, remaining_prefix
)) {
127 if (abspath_part_inside_repo(sanitized
)) {
132 sanitized
= xstrfmt("%.*s%s", len
, len
? prefix
: "", path
);
133 if (remaining_prefix
)
134 *remaining_prefix
= len
;
135 if (normalize_path_copy_len(sanitized
, sanitized
, remaining_prefix
)) {
143 char *prefix_path(const char *prefix
, int len
, const char *path
)
145 char *r
= prefix_path_gently(prefix
, len
, NULL
, path
);
147 const char *hint_path
= get_git_work_tree();
149 hint_path
= get_git_dir();
150 die(_("'%s' is outside repository at '%s'"), path
,
151 absolute_path(hint_path
));
156 int path_inside_repo(const char *prefix
, const char *path
)
158 int len
= prefix
? strlen(prefix
) : 0;
159 char *r
= prefix_path_gently(prefix
, len
, NULL
, path
);
167 int check_filename(const char *prefix
, const char *arg
)
169 char *to_free
= NULL
;
172 if (skip_prefix(arg
, ":/", &arg
)) {
173 if (!*arg
) /* ":/" is root dir, always exists */
176 } else if (skip_prefix(arg
, ":!", &arg
) ||
177 skip_prefix(arg
, ":^", &arg
)) {
178 if (!*arg
) /* excluding everything is silly, but allowed */
183 arg
= to_free
= prefix_filename(prefix
, arg
);
185 if (!lstat(arg
, &st
)) {
187 return 1; /* file exists */
189 if (is_missing_file_error(errno
)) {
191 return 0; /* file does not exist */
193 die_errno(_("failed to stat '%s'"), arg
);
196 static void NORETURN
die_verify_filename(struct repository
*r
,
199 int diagnose_misspelt_rev
)
201 if (!diagnose_misspelt_rev
)
202 die(_("%s: no such path in the working tree.\n"
203 "Use 'git <command> -- <path>...' to specify paths that do not exist locally."),
206 * Saying "'(icase)foo' does not exist in the index" when the
207 * user gave us ":(icase)foo" is just stupid. A magic pathspec
208 * begins with a colon and is followed by a non-alnum; do not
209 * let maybe_die_on_misspelt_object_name() even trigger.
211 if (!(arg
[0] == ':' && !isalnum(arg
[1])))
212 maybe_die_on_misspelt_object_name(r
, arg
, prefix
);
214 /* ... or fall back the most general message. */
215 die(_("ambiguous argument '%s': unknown revision or path not in the working tree.\n"
216 "Use '--' to separate paths from revisions, like this:\n"
217 "'git <command> [<revision>...] -- [<file>...]'"), arg
);
222 * Check for arguments that don't resolve as actual files,
223 * but which look sufficiently like pathspecs that we'll consider
224 * them such for the purposes of rev/pathspec DWIM parsing.
226 static int looks_like_pathspec(const char *arg
)
232 * Wildcard characters imply the user is looking to match pathspecs
233 * that aren't in the filesystem. Note that this doesn't include
234 * backslash even though it's a glob special; by itself it doesn't
235 * cause any increase in the match. Likewise ignore backslash-escaped
236 * wildcard characters.
238 for (p
= arg
; *p
; p
++) {
241 } else if (is_glob_special(*p
)) {
249 /* long-form pathspec magic */
250 if (starts_with(arg
, ":("))
257 * Verify a filename that we got as an argument for a pathspec
258 * entry. Note that a filename that begins with "-" never verifies
259 * as true, because even if such a filename were to exist, we want
260 * it to be preceded by the "--" marker (or we want the user to
261 * use a format like "./-filename")
263 * The "diagnose_misspelt_rev" is used to provide a user-friendly
264 * diagnosis when dying upon finding that "name" is not a pathname.
265 * If set to 1, the diagnosis will try to diagnose "name" as an
266 * invalid object name (e.g. HEAD:foo). If set to 0, the diagnosis
267 * will only complain about an inexisting file.
269 * This function is typically called to check that a "file or rev"
270 * argument is unambiguous. In this case, the caller will want
271 * diagnose_misspelt_rev == 1 when verifying the first non-rev
272 * argument (which could have been a revision), and
273 * diagnose_misspelt_rev == 0 for the next ones (because we already
274 * saw a filename, there's not ambiguity anymore).
276 void verify_filename(const char *prefix
,
278 int diagnose_misspelt_rev
)
281 die(_("option '%s' must come before non-option arguments"), arg
);
282 if (looks_like_pathspec(arg
) || check_filename(prefix
, arg
))
284 die_verify_filename(the_repository
, prefix
, arg
, diagnose_misspelt_rev
);
288 * Opposite of the above: the command line did not have -- marker
289 * and we parsed the arg as a refname. It should not be interpretable
292 void verify_non_filename(const char *prefix
, const char *arg
)
294 if (!is_inside_work_tree() || is_inside_git_dir())
298 if (!check_filename(prefix
, arg
))
300 die(_("ambiguous argument '%s': both revision and filename\n"
301 "Use '--' to separate paths from revisions, like this:\n"
302 "'git <command> [<revision>...] -- [<file>...]'"), arg
);
305 int get_common_dir(struct strbuf
*sb
, const char *gitdir
)
307 const char *git_env_common_dir
= getenv(GIT_COMMON_DIR_ENVIRONMENT
);
308 if (git_env_common_dir
) {
309 strbuf_addstr(sb
, git_env_common_dir
);
312 return get_common_dir_noenv(sb
, gitdir
);
316 int get_common_dir_noenv(struct strbuf
*sb
, const char *gitdir
)
318 struct strbuf data
= STRBUF_INIT
;
319 struct strbuf path
= STRBUF_INIT
;
322 strbuf_addf(&path
, "%s/commondir", gitdir
);
323 if (file_exists(path
.buf
)) {
324 if (strbuf_read_file(&data
, path
.buf
, 0) <= 0)
325 die_errno(_("failed to read %s"), path
.buf
);
326 while (data
.len
&& (data
.buf
[data
.len
- 1] == '\n' ||
327 data
.buf
[data
.len
- 1] == '\r'))
329 data
.buf
[data
.len
] = '\0';
331 if (!is_absolute_path(data
.buf
))
332 strbuf_addf(&path
, "%s/", gitdir
);
333 strbuf_addbuf(&path
, &data
);
334 strbuf_add_real_path(sb
, path
.buf
);
337 strbuf_addstr(sb
, gitdir
);
340 strbuf_release(&data
);
341 strbuf_release(&path
);
346 * Test if it looks like we're at a git directory.
349 * - either an objects/ directory _or_ the proper
350 * GIT_OBJECT_DIRECTORY environment variable
351 * - a refs/ directory
352 * - either a HEAD symlink or a HEAD file that is formatted as
353 * a proper "ref:", or a regular file HEAD that has a properly
354 * formatted sha1 object name.
356 int is_git_directory(const char *suspect
)
358 struct strbuf path
= STRBUF_INIT
;
362 /* Check worktree-related signatures */
363 strbuf_addstr(&path
, suspect
);
364 strbuf_complete(&path
, '/');
365 strbuf_addstr(&path
, "HEAD");
366 if (validate_headref(path
.buf
))
370 get_common_dir(&path
, suspect
);
373 /* Check non-worktree-related signatures */
374 if (getenv(DB_ENVIRONMENT
)) {
375 if (access(getenv(DB_ENVIRONMENT
), X_OK
))
379 strbuf_setlen(&path
, len
);
380 strbuf_addstr(&path
, "/objects");
381 if (access(path
.buf
, X_OK
))
385 strbuf_setlen(&path
, len
);
386 strbuf_addstr(&path
, "/refs");
387 if (access(path
.buf
, X_OK
))
392 strbuf_release(&path
);
396 int is_nonbare_repository_dir(struct strbuf
*path
)
400 size_t orig_path_len
= path
->len
;
401 assert(orig_path_len
!= 0);
402 strbuf_complete(path
, '/');
403 strbuf_addstr(path
, ".git");
404 if (read_gitfile_gently(path
->buf
, &gitfile_error
) || is_git_directory(path
->buf
))
406 if (gitfile_error
== READ_GITFILE_ERR_OPEN_FAILED
||
407 gitfile_error
== READ_GITFILE_ERR_READ_FAILED
)
409 strbuf_setlen(path
, orig_path_len
);
413 int is_inside_git_dir(void)
415 if (inside_git_dir
< 0)
416 inside_git_dir
= is_inside_dir(get_git_dir());
417 return inside_git_dir
;
420 int is_inside_work_tree(void)
422 if (inside_work_tree
< 0)
423 inside_work_tree
= is_inside_dir(get_git_work_tree());
424 return inside_work_tree
;
427 void setup_work_tree(void)
429 const char *work_tree
;
430 static int initialized
= 0;
435 if (work_tree_config_is_bogus
)
436 die(_("unable to set up work tree using invalid config"));
438 work_tree
= get_git_work_tree();
439 if (!work_tree
|| chdir_notify(work_tree
))
440 die(_("this operation must be run in a work tree"));
443 * Make sure subsequent git processes find correct worktree
444 * if $GIT_WORK_TREE is set relative
446 if (getenv(GIT_WORK_TREE_ENVIRONMENT
))
447 setenv(GIT_WORK_TREE_ENVIRONMENT
, ".", 1);
452 static void setup_original_cwd(void)
454 struct strbuf tmp
= STRBUF_INIT
;
455 const char *worktree
= NULL
;
458 if (!tmp_original_cwd
)
462 * startup_info->original_cwd points to the current working
463 * directory we inherited from our parent process, which is a
464 * directory we want to avoid removing.
466 * For convience, we would like to have the path relative to the
467 * worktree instead of an absolute path.
469 * Yes, startup_info->original_cwd is usually the same as 'prefix',
470 * but differs in two ways:
471 * - prefix has a trailing '/'
472 * - if the user passes '-C' to git, that modifies the prefix but
473 * not startup_info->original_cwd.
476 /* Normalize the directory */
477 if (!strbuf_realpath(&tmp
, tmp_original_cwd
, 0)) {
478 trace2_data_string("setup", the_repository
,
479 "realpath-path", tmp_original_cwd
);
480 trace2_data_string("setup", the_repository
,
481 "realpath-failure", strerror(errno
));
482 free((char*)tmp_original_cwd
);
483 tmp_original_cwd
= NULL
;
487 free((char*)tmp_original_cwd
);
488 tmp_original_cwd
= NULL
;
489 startup_info
->original_cwd
= strbuf_detach(&tmp
, NULL
);
492 * Get our worktree; we only protect the current working directory
493 * if it's in the worktree.
495 worktree
= get_git_work_tree();
497 goto no_prevention_needed
;
499 offset
= dir_inside_of(startup_info
->original_cwd
, worktree
);
502 * If startup_info->original_cwd == worktree, that is already
503 * protected and we don't need original_cwd as a secondary
504 * protection measure.
506 if (!*(startup_info
->original_cwd
+ offset
))
507 goto no_prevention_needed
;
510 * original_cwd was inside worktree; precompose it just as
511 * we do prefix so that built up paths will match
513 startup_info
->original_cwd
= \
514 precompose_string_if_needed(startup_info
->original_cwd
519 no_prevention_needed
:
520 free((char*)startup_info
->original_cwd
);
521 startup_info
->original_cwd
= NULL
;
524 static int read_worktree_config(const char *var
, const char *value
,
525 const struct config_context
*ctx UNUSED
,
528 struct repository_format
*data
= vdata
;
530 if (strcmp(var
, "core.bare") == 0) {
531 data
->is_bare
= git_config_bool(var
, value
);
532 } else if (strcmp(var
, "core.worktree") == 0) {
534 return config_error_nonbool(var
);
535 free(data
->work_tree
);
536 data
->work_tree
= xstrdup(value
);
541 enum extension_result
{
542 EXTENSION_ERROR
= -1, /* compatible with error(), etc */
543 EXTENSION_UNKNOWN
= 0,
548 * Do not add new extensions to this function. It handles extensions which are
549 * respected even in v0-format repositories for historical compatibility.
551 static enum extension_result
handle_extension_v0(const char *var
,
554 struct repository_format
*data
)
556 if (!strcmp(ext
, "noop")) {
558 } else if (!strcmp(ext
, "preciousobjects")) {
559 data
->precious_objects
= git_config_bool(var
, value
);
561 } else if (!strcmp(ext
, "partialclone")) {
562 data
->partial_clone
= xstrdup(value
);
564 } else if (!strcmp(ext
, "worktreeconfig")) {
565 data
->worktree_config
= git_config_bool(var
, value
);
569 return EXTENSION_UNKNOWN
;
573 * Record any new extensions in this function.
575 static enum extension_result
handle_extension(const char *var
,
578 struct repository_format
*data
)
580 if (!strcmp(ext
, "noop-v1")) {
582 } else if (!strcmp(ext
, "objectformat")) {
586 return config_error_nonbool(var
);
587 format
= hash_algo_by_name(value
);
588 if (format
== GIT_HASH_UNKNOWN
)
589 return error(_("invalid value for '%s': '%s'"),
590 "extensions.objectformat", value
);
591 data
->hash_algo
= format
;
594 return EXTENSION_UNKNOWN
;
597 static int check_repo_format(const char *var
, const char *value
,
598 const struct config_context
*ctx
, void *vdata
)
600 struct repository_format
*data
= vdata
;
603 if (strcmp(var
, "core.repositoryformatversion") == 0)
604 data
->version
= git_config_int(var
, value
, ctx
->kvi
);
605 else if (skip_prefix(var
, "extensions.", &ext
)) {
606 switch (handle_extension_v0(var
, value
, ext
, data
)) {
607 case EXTENSION_ERROR
:
611 case EXTENSION_UNKNOWN
:
615 switch (handle_extension(var
, value
, ext
, data
)) {
616 case EXTENSION_ERROR
:
619 string_list_append(&data
->v1_only_extensions
, ext
);
621 case EXTENSION_UNKNOWN
:
622 string_list_append(&data
->unknown_extensions
, ext
);
627 return read_worktree_config(var
, value
, ctx
, vdata
);
630 static int check_repository_format_gently(const char *gitdir
, struct repository_format
*candidate
, int *nongit_ok
)
632 struct strbuf sb
= STRBUF_INIT
;
633 struct strbuf err
= STRBUF_INIT
;
636 has_common
= get_common_dir(&sb
, gitdir
);
637 strbuf_addstr(&sb
, "/config");
638 read_repository_format(candidate
, sb
.buf
);
642 * For historical use of check_repository_format() in git-init,
643 * we treat a missing config as a silent "ok", even when nongit_ok
646 if (candidate
->version
< 0)
649 if (verify_repository_format(candidate
, &err
) < 0) {
651 warning("%s", err
.buf
);
652 strbuf_release(&err
);
659 repository_format_precious_objects
= candidate
->precious_objects
;
660 string_list_clear(&candidate
->unknown_extensions
, 0);
661 string_list_clear(&candidate
->v1_only_extensions
, 0);
663 if (candidate
->worktree_config
) {
665 * pick up core.bare and core.worktree from per-worktree
668 strbuf_addf(&sb
, "%s/config.worktree", gitdir
);
669 git_config_from_file(read_worktree_config
, sb
.buf
, candidate
);
675 if (candidate
->is_bare
!= -1) {
676 is_bare_repository_cfg
= candidate
->is_bare
;
677 if (is_bare_repository_cfg
== 1)
678 inside_work_tree
= -1;
680 if (candidate
->work_tree
) {
681 free(git_work_tree_cfg
);
682 git_work_tree_cfg
= xstrdup(candidate
->work_tree
);
683 inside_work_tree
= -1;
690 int upgrade_repository_format(int target_version
)
692 struct strbuf sb
= STRBUF_INIT
;
693 struct strbuf err
= STRBUF_INIT
;
694 struct strbuf repo_version
= STRBUF_INIT
;
695 struct repository_format repo_fmt
= REPOSITORY_FORMAT_INIT
;
698 strbuf_git_common_path(&sb
, the_repository
, "config");
699 read_repository_format(&repo_fmt
, sb
.buf
);
702 if (repo_fmt
.version
>= target_version
) {
707 if (verify_repository_format(&repo_fmt
, &err
) < 0) {
708 ret
= error("cannot upgrade repository format from %d to %d: %s",
709 repo_fmt
.version
, target_version
, err
.buf
);
712 if (!repo_fmt
.version
&& repo_fmt
.unknown_extensions
.nr
) {
713 ret
= error("cannot upgrade repository format: "
714 "unknown extension %s",
715 repo_fmt
.unknown_extensions
.items
[0].string
);
719 strbuf_addf(&repo_version
, "%d", target_version
);
720 git_config_set("core.repositoryformatversion", repo_version
.buf
);
725 clear_repository_format(&repo_fmt
);
726 strbuf_release(&repo_version
);
727 strbuf_release(&err
);
731 static void init_repository_format(struct repository_format
*format
)
733 const struct repository_format fresh
= REPOSITORY_FORMAT_INIT
;
735 memcpy(format
, &fresh
, sizeof(fresh
));
738 int read_repository_format(struct repository_format
*format
, const char *path
)
740 clear_repository_format(format
);
741 git_config_from_file(check_repo_format
, path
, format
);
742 if (format
->version
== -1)
743 clear_repository_format(format
);
744 return format
->version
;
747 void clear_repository_format(struct repository_format
*format
)
749 string_list_clear(&format
->unknown_extensions
, 0);
750 string_list_clear(&format
->v1_only_extensions
, 0);
751 free(format
->work_tree
);
752 free(format
->partial_clone
);
753 init_repository_format(format
);
756 int verify_repository_format(const struct repository_format
*format
,
759 if (GIT_REPO_VERSION_READ
< format
->version
) {
760 strbuf_addf(err
, _("Expected git repo version <= %d, found %d"),
761 GIT_REPO_VERSION_READ
, format
->version
);
765 if (format
->version
>= 1 && format
->unknown_extensions
.nr
) {
768 strbuf_addstr(err
, Q_("unknown repository extension found:",
769 "unknown repository extensions found:",
770 format
->unknown_extensions
.nr
));
772 for (i
= 0; i
< format
->unknown_extensions
.nr
; i
++)
773 strbuf_addf(err
, "\n\t%s",
774 format
->unknown_extensions
.items
[i
].string
);
778 if (format
->version
== 0 && format
->v1_only_extensions
.nr
) {
782 Q_("repo version is 0, but v1-only extension found:",
783 "repo version is 0, but v1-only extensions found:",
784 format
->v1_only_extensions
.nr
));
786 for (i
= 0; i
< format
->v1_only_extensions
.nr
; i
++)
787 strbuf_addf(err
, "\n\t%s",
788 format
->v1_only_extensions
.items
[i
].string
);
795 void read_gitfile_error_die(int error_code
, const char *path
, const char *dir
)
797 switch (error_code
) {
798 case READ_GITFILE_ERR_STAT_FAILED
:
799 case READ_GITFILE_ERR_NOT_A_FILE
:
800 /* non-fatal; follow return path */
802 case READ_GITFILE_ERR_OPEN_FAILED
:
803 die_errno(_("error opening '%s'"), path
);
804 case READ_GITFILE_ERR_TOO_LARGE
:
805 die(_("too large to be a .git file: '%s'"), path
);
806 case READ_GITFILE_ERR_READ_FAILED
:
807 die(_("error reading %s"), path
);
808 case READ_GITFILE_ERR_INVALID_FORMAT
:
809 die(_("invalid gitfile format: %s"), path
);
810 case READ_GITFILE_ERR_NO_PATH
:
811 die(_("no path in gitfile: %s"), path
);
812 case READ_GITFILE_ERR_NOT_A_REPO
:
813 die(_("not a git repository: %s"), dir
);
815 BUG("unknown error code");
820 * Try to read the location of the git directory from the .git file,
821 * return path to git directory if found. The return value comes from
824 * On failure, if return_error_code is not NULL, return_error_code
825 * will be set to an error code and NULL will be returned. If
826 * return_error_code is NULL the function will die instead (for most
829 const char *read_gitfile_gently(const char *path
, int *return_error_code
)
831 const int max_file_size
= 1 << 20; /* 1MB */
839 static struct strbuf realpath
= STRBUF_INIT
;
841 if (stat(path
, &st
)) {
842 /* NEEDSWORK: discern between ENOENT vs other errors */
843 error_code
= READ_GITFILE_ERR_STAT_FAILED
;
846 if (!S_ISREG(st
.st_mode
)) {
847 error_code
= READ_GITFILE_ERR_NOT_A_FILE
;
850 if (st
.st_size
> max_file_size
) {
851 error_code
= READ_GITFILE_ERR_TOO_LARGE
;
854 fd
= open(path
, O_RDONLY
);
856 error_code
= READ_GITFILE_ERR_OPEN_FAILED
;
859 buf
= xmallocz(st
.st_size
);
860 len
= read_in_full(fd
, buf
, st
.st_size
);
862 if (len
!= st
.st_size
) {
863 error_code
= READ_GITFILE_ERR_READ_FAILED
;
866 if (!starts_with(buf
, "gitdir: ")) {
867 error_code
= READ_GITFILE_ERR_INVALID_FORMAT
;
870 while (buf
[len
- 1] == '\n' || buf
[len
- 1] == '\r')
873 error_code
= READ_GITFILE_ERR_NO_PATH
;
879 if (!is_absolute_path(dir
) && (slash
= strrchr(path
, '/'))) {
880 size_t pathlen
= slash
+1 - path
;
881 dir
= xstrfmt("%.*s%.*s", (int)pathlen
, path
,
882 (int)(len
- 8), buf
+ 8);
886 if (!is_git_directory(dir
)) {
887 error_code
= READ_GITFILE_ERR_NOT_A_REPO
;
891 strbuf_realpath(&realpath
, dir
, 1);
895 if (return_error_code
)
896 *return_error_code
= error_code
;
898 read_gitfile_error_die(error_code
, path
, dir
);
901 return error_code
? NULL
: path
;
904 static const char *setup_explicit_git_dir(const char *gitdirenv
,
906 struct repository_format
*repo_fmt
,
909 const char *work_tree_env
= getenv(GIT_WORK_TREE_ENVIRONMENT
);
910 const char *worktree
;
914 if (PATH_MAX
- 40 < strlen(gitdirenv
))
915 die(_("'$%s' too big"), GIT_DIR_ENVIRONMENT
);
917 gitfile
= (char*)read_gitfile(gitdirenv
);
919 gitfile
= xstrdup(gitfile
);
923 if (!is_git_directory(gitdirenv
)) {
929 die(_("not a git repository: '%s'"), gitdirenv
);
932 if (check_repository_format_gently(gitdirenv
, repo_fmt
, nongit_ok
)) {
937 /* #3, #7, #11, #15, #19, #23, #27, #31 (see t1510) */
939 set_git_work_tree(work_tree_env
);
940 else if (is_bare_repository_cfg
> 0) {
941 if (git_work_tree_cfg
) {
943 warning("core.bare and core.worktree do not make sense");
944 work_tree_config_is_bogus
= 1;
948 set_git_dir(gitdirenv
, 0);
952 else if (git_work_tree_cfg
) { /* #6, #14 */
953 if (is_absolute_path(git_work_tree_cfg
))
954 set_git_work_tree(git_work_tree_cfg
);
957 if (chdir(gitdirenv
))
958 die_errno(_("cannot chdir to '%s'"), gitdirenv
);
959 if (chdir(git_work_tree_cfg
))
960 die_errno(_("cannot chdir to '%s'"), git_work_tree_cfg
);
961 core_worktree
= xgetcwd();
963 die_errno(_("cannot come back to cwd"));
964 set_git_work_tree(core_worktree
);
968 else if (!git_env_bool(GIT_IMPLICIT_WORK_TREE_ENVIRONMENT
, 1)) {
970 set_git_dir(gitdirenv
, 0);
975 set_git_work_tree(".");
977 /* set_git_work_tree() must have been called by now */
978 worktree
= get_git_work_tree();
980 /* both get_git_work_tree() and cwd are already normalized */
981 if (!strcmp(cwd
->buf
, worktree
)) { /* cwd == worktree */
982 set_git_dir(gitdirenv
, 0);
987 offset
= dir_inside_of(cwd
->buf
, worktree
);
988 if (offset
>= 0) { /* cwd inside worktree? */
989 set_git_dir(gitdirenv
, 1);
991 die_errno(_("cannot chdir to '%s'"), worktree
);
992 strbuf_addch(cwd
, '/');
994 return cwd
->buf
+ offset
;
997 /* cwd outside worktree */
998 set_git_dir(gitdirenv
, 0);
1003 static const char *setup_discovered_git_dir(const char *gitdir
,
1004 struct strbuf
*cwd
, int offset
,
1005 struct repository_format
*repo_fmt
,
1008 if (check_repository_format_gently(gitdir
, repo_fmt
, nongit_ok
))
1011 /* --work-tree is set without --git-dir; use discovered one */
1012 if (getenv(GIT_WORK_TREE_ENVIRONMENT
) || git_work_tree_cfg
) {
1013 char *to_free
= NULL
;
1016 if (offset
!= cwd
->len
&& !is_absolute_path(gitdir
))
1017 gitdir
= to_free
= real_pathdup(gitdir
, 1);
1018 if (chdir(cwd
->buf
))
1019 die_errno(_("cannot come back to cwd"));
1020 ret
= setup_explicit_git_dir(gitdir
, cwd
, repo_fmt
, nongit_ok
);
1025 /* #16.2, #17.2, #20.2, #21.2, #24, #25, #28, #29 (see t1510) */
1026 if (is_bare_repository_cfg
> 0) {
1027 set_git_dir(gitdir
, (offset
!= cwd
->len
));
1028 if (chdir(cwd
->buf
))
1029 die_errno(_("cannot come back to cwd"));
1033 /* #0, #1, #5, #8, #9, #12, #13 */
1034 set_git_work_tree(".");
1035 if (strcmp(gitdir
, DEFAULT_GIT_DIR_ENVIRONMENT
))
1036 set_git_dir(gitdir
, 0);
1038 inside_work_tree
= 1;
1039 if (offset
>= cwd
->len
)
1042 /* Make "offset" point past the '/' (already the case for root dirs) */
1043 if (offset
!= offset_1st_component(cwd
->buf
))
1045 /* Add a '/' at the end */
1046 strbuf_addch(cwd
, '/');
1047 return cwd
->buf
+ offset
;
1050 /* #16.1, #17.1, #20.1, #21.1, #22.1 (see t1510) */
1051 static const char *setup_bare_git_dir(struct strbuf
*cwd
, int offset
,
1052 struct repository_format
*repo_fmt
,
1057 if (check_repository_format_gently(".", repo_fmt
, nongit_ok
))
1060 setenv(GIT_IMPLICIT_WORK_TREE_ENVIRONMENT
, "0", 1);
1062 /* --work-tree is set without --git-dir; use discovered one */
1063 if (getenv(GIT_WORK_TREE_ENVIRONMENT
) || git_work_tree_cfg
) {
1064 static const char *gitdir
;
1066 gitdir
= offset
== cwd
->len
? "." : xmemdupz(cwd
->buf
, offset
);
1067 if (chdir(cwd
->buf
))
1068 die_errno(_("cannot come back to cwd"));
1069 return setup_explicit_git_dir(gitdir
, cwd
, repo_fmt
, nongit_ok
);
1073 inside_work_tree
= 0;
1074 if (offset
!= cwd
->len
) {
1075 if (chdir(cwd
->buf
))
1076 die_errno(_("cannot come back to cwd"));
1077 root_len
= offset_1st_component(cwd
->buf
);
1078 strbuf_setlen(cwd
, offset
> root_len
? offset
: root_len
);
1079 set_git_dir(cwd
->buf
, 0);
1082 set_git_dir(".", 0);
1086 static dev_t
get_device_or_die(const char *path
, const char *prefix
, int prefix_len
)
1089 if (stat(path
, &buf
)) {
1090 die_errno(_("failed to stat '%*s%s%s'"),
1092 prefix
? prefix
: "",
1093 prefix
? "/" : "", path
);
1099 * A "string_list_each_func_t" function that canonicalizes an entry
1100 * from GIT_CEILING_DIRECTORIES using real_pathdup(), or
1101 * discards it if unusable. The presence of an empty entry in
1102 * GIT_CEILING_DIRECTORIES turns off canonicalization for all
1103 * subsequent entries.
1105 static int canonicalize_ceiling_entry(struct string_list_item
*item
,
1108 int *empty_entry_found
= cb_data
;
1109 char *ceil
= item
->string
;
1112 *empty_entry_found
= 1;
1114 } else if (!is_absolute_path(ceil
)) {
1116 } else if (*empty_entry_found
) {
1117 /* Keep entry but do not canonicalize it */
1120 char *real_path
= real_pathdup(ceil
, 0);
1125 item
->string
= real_path
;
1130 struct safe_directory_data
{
1135 static int safe_directory_cb(const char *key
, const char *value
,
1136 const struct config_context
*ctx UNUSED
, void *d
)
1138 struct safe_directory_data
*data
= d
;
1140 if (strcmp(key
, "safe.directory"))
1143 if (!value
|| !*value
) {
1145 } else if (!strcmp(value
, "*")) {
1148 const char *interpolated
= NULL
;
1150 if (!git_config_pathname(&interpolated
, key
, value
) &&
1151 !fspathcmp(data
->path
, interpolated
? interpolated
: value
))
1154 free((char *)interpolated
);
1161 * Check if a repository is safe, by verifying the ownership of the
1162 * worktree (if any), the git directory, and the gitfile (if any).
1164 * Exemptions for known-safe repositories can be added via `safe.directory`
1165 * config settings; for non-bare repositories, their worktree needs to be
1166 * added, for bare ones their git directory.
1168 static int ensure_valid_ownership(const char *gitfile
,
1169 const char *worktree
, const char *gitdir
,
1170 struct strbuf
*report
)
1172 struct safe_directory_data data
= {
1173 .path
= worktree
? worktree
: gitdir
1176 if (!git_env_bool("GIT_TEST_ASSUME_DIFFERENT_OWNER", 0) &&
1177 (!gitfile
|| is_path_owned_by_current_user(gitfile
, report
)) &&
1178 (!worktree
|| is_path_owned_by_current_user(worktree
, report
)) &&
1179 (!gitdir
|| is_path_owned_by_current_user(gitdir
, report
)))
1183 * data.path is the "path" that identifies the repository and it is
1184 * constant regardless of what failed above. data.is_safe should be
1185 * initialized to false, and might be changed by the callback.
1187 git_protected_config(safe_directory_cb
, &data
);
1189 return data
.is_safe
;
1192 static int allowed_bare_repo_cb(const char *key
, const char *value
,
1193 const struct config_context
*ctx UNUSED
,
1196 enum allowed_bare_repo
*allowed_bare_repo
= d
;
1198 if (strcasecmp(key
, "safe.bareRepository"))
1201 if (!strcmp(value
, "explicit")) {
1202 *allowed_bare_repo
= ALLOWED_BARE_REPO_EXPLICIT
;
1205 if (!strcmp(value
, "all")) {
1206 *allowed_bare_repo
= ALLOWED_BARE_REPO_ALL
;
1212 static enum allowed_bare_repo
get_allowed_bare_repo(void)
1214 enum allowed_bare_repo result
= ALLOWED_BARE_REPO_ALL
;
1215 git_protected_config(allowed_bare_repo_cb
, &result
);
1219 static const char *allowed_bare_repo_to_string(
1220 enum allowed_bare_repo allowed_bare_repo
)
1222 switch (allowed_bare_repo
) {
1223 case ALLOWED_BARE_REPO_EXPLICIT
:
1225 case ALLOWED_BARE_REPO_ALL
:
1228 BUG("invalid allowed_bare_repo %d",
1235 * We cannot decide in this function whether we are in the work tree or
1236 * not, since the config can only be read _after_ this function was called.
1238 * Also, we avoid changing any global state (such as the current working
1239 * directory) to allow early callers.
1241 * The directory where the search should start needs to be passed in via the
1242 * `dir` parameter; upon return, the `dir` buffer will contain the path of
1243 * the directory where the search ended, and `gitdir` will contain the path of
1244 * the discovered .git/ directory, if any. If `gitdir` is not absolute, it
1245 * is relative to `dir` (i.e. *not* necessarily the cwd).
1247 static enum discovery_result
setup_git_directory_gently_1(struct strbuf
*dir
,
1248 struct strbuf
*gitdir
,
1249 struct strbuf
*report
,
1252 const char *env_ceiling_dirs
= getenv(CEILING_DIRECTORIES_ENVIRONMENT
);
1253 struct string_list ceiling_dirs
= STRING_LIST_INIT_DUP
;
1254 const char *gitdirenv
;
1255 int ceil_offset
= -1, min_offset
= offset_1st_component(dir
->buf
);
1256 dev_t current_device
= 0;
1257 int one_filesystem
= 1;
1260 * If GIT_DIR is set explicitly, we're not going
1261 * to do any discovery, but we still do repository
1264 gitdirenv
= getenv(GIT_DIR_ENVIRONMENT
);
1266 strbuf_addstr(gitdir
, gitdirenv
);
1267 return GIT_DIR_EXPLICIT
;
1270 if (env_ceiling_dirs
) {
1271 int empty_entry_found
= 0;
1273 string_list_split(&ceiling_dirs
, env_ceiling_dirs
, PATH_SEP
, -1);
1274 filter_string_list(&ceiling_dirs
, 0,
1275 canonicalize_ceiling_entry
, &empty_entry_found
);
1276 ceil_offset
= longest_ancestor_length(dir
->buf
, &ceiling_dirs
);
1277 string_list_clear(&ceiling_dirs
, 0);
1280 if (ceil_offset
< 0)
1281 ceil_offset
= min_offset
- 2;
1283 if (min_offset
&& min_offset
== dir
->len
&&
1284 !is_dir_sep(dir
->buf
[min_offset
- 1])) {
1285 strbuf_addch(dir
, '/');
1290 * Test in the following order (relative to the dir):
1291 * - .git (file containing "gitdir: <path>")
1300 one_filesystem
= !git_env_bool("GIT_DISCOVERY_ACROSS_FILESYSTEM", 0);
1302 current_device
= get_device_or_die(dir
->buf
, NULL
, 0);
1304 int offset
= dir
->len
, error_code
= 0;
1305 char *gitdir_path
= NULL
;
1306 char *gitfile
= NULL
;
1308 if (offset
> min_offset
)
1309 strbuf_addch(dir
, '/');
1310 strbuf_addstr(dir
, DEFAULT_GIT_DIR_ENVIRONMENT
);
1311 gitdirenv
= read_gitfile_gently(dir
->buf
, die_on_error
?
1312 NULL
: &error_code
);
1315 error_code
== READ_GITFILE_ERR_NOT_A_FILE
) {
1316 /* NEEDSWORK: fail if .git is not file nor dir */
1317 if (is_git_directory(dir
->buf
)) {
1318 gitdirenv
= DEFAULT_GIT_DIR_ENVIRONMENT
;
1319 gitdir_path
= xstrdup(dir
->buf
);
1321 } else if (error_code
!= READ_GITFILE_ERR_STAT_FAILED
)
1322 return GIT_DIR_INVALID_GITFILE
;
1324 gitfile
= xstrdup(dir
->buf
);
1326 * Earlier, we tentatively added DEFAULT_GIT_DIR_ENVIRONMENT
1327 * to check that directory for a repository.
1328 * Now trim that tentative addition away, because we want to
1329 * focus on the real directory we are in.
1331 strbuf_setlen(dir
, offset
);
1333 enum discovery_result ret
;
1334 const char *gitdir_candidate
=
1335 gitdir_path
? gitdir_path
: gitdirenv
;
1337 if (ensure_valid_ownership(gitfile
, dir
->buf
,
1338 gitdir_candidate
, report
)) {
1339 strbuf_addstr(gitdir
, gitdirenv
);
1340 ret
= GIT_DIR_DISCOVERED
;
1342 ret
= GIT_DIR_INVALID_OWNERSHIP
;
1345 * Earlier, during discovery, we might have allocated
1346 * string copies for gitdir_path or gitfile so make
1347 * sure we don't leak by freeing them now, before
1348 * leaving the loop and function.
1350 * Note: gitdirenv will be non-NULL whenever these are
1351 * allocated, therefore we need not take care of releasing
1352 * them outside of this conditional block.
1360 if (is_git_directory(dir
->buf
)) {
1361 trace2_data_string("setup", NULL
, "implicit-bare-repository", dir
->buf
);
1362 if (get_allowed_bare_repo() == ALLOWED_BARE_REPO_EXPLICIT
)
1363 return GIT_DIR_DISALLOWED_BARE
;
1364 if (!ensure_valid_ownership(NULL
, NULL
, dir
->buf
, report
))
1365 return GIT_DIR_INVALID_OWNERSHIP
;
1366 strbuf_addstr(gitdir
, ".");
1367 return GIT_DIR_BARE
;
1370 if (offset
<= min_offset
)
1371 return GIT_DIR_HIT_CEILING
;
1373 while (--offset
> ceil_offset
&& !is_dir_sep(dir
->buf
[offset
]))
1375 if (offset
<= ceil_offset
)
1376 return GIT_DIR_HIT_CEILING
;
1378 strbuf_setlen(dir
, offset
> min_offset
? offset
: min_offset
);
1379 if (one_filesystem
&&
1380 current_device
!= get_device_or_die(dir
->buf
, NULL
, offset
))
1381 return GIT_DIR_HIT_MOUNT_POINT
;
1385 enum discovery_result
discover_git_directory_reason(struct strbuf
*commondir
,
1386 struct strbuf
*gitdir
)
1388 struct strbuf dir
= STRBUF_INIT
, err
= STRBUF_INIT
;
1389 size_t gitdir_offset
= gitdir
->len
, cwd_len
;
1390 size_t commondir_offset
= commondir
->len
;
1391 struct repository_format candidate
= REPOSITORY_FORMAT_INIT
;
1392 enum discovery_result result
;
1394 if (strbuf_getcwd(&dir
))
1395 return GIT_DIR_CWD_FAILURE
;
1398 result
= setup_git_directory_gently_1(&dir
, gitdir
, NULL
, 0);
1400 strbuf_release(&dir
);
1405 * The returned gitdir is relative to dir, and if dir does not reflect
1406 * the current working directory, we simply make the gitdir absolute.
1408 if (dir
.len
< cwd_len
&& !is_absolute_path(gitdir
->buf
+ gitdir_offset
)) {
1409 /* Avoid a trailing "/." */
1410 if (!strcmp(".", gitdir
->buf
+ gitdir_offset
))
1411 strbuf_setlen(gitdir
, gitdir_offset
);
1413 strbuf_addch(&dir
, '/');
1414 strbuf_insert(gitdir
, gitdir_offset
, dir
.buf
, dir
.len
);
1417 get_common_dir(commondir
, gitdir
->buf
+ gitdir_offset
);
1420 strbuf_addf(&dir
, "%s/config", commondir
->buf
+ commondir_offset
);
1421 read_repository_format(&candidate
, dir
.buf
);
1422 strbuf_release(&dir
);
1424 if (verify_repository_format(&candidate
, &err
) < 0) {
1425 warning("ignoring git dir '%s': %s",
1426 gitdir
->buf
+ gitdir_offset
, err
.buf
);
1427 strbuf_release(&err
);
1428 strbuf_setlen(commondir
, commondir_offset
);
1429 strbuf_setlen(gitdir
, gitdir_offset
);
1430 clear_repository_format(&candidate
);
1431 return GIT_DIR_INVALID_FORMAT
;
1434 clear_repository_format(&candidate
);
1438 const char *setup_git_directory_gently(int *nongit_ok
)
1440 static struct strbuf cwd
= STRBUF_INIT
;
1441 struct strbuf dir
= STRBUF_INIT
, gitdir
= STRBUF_INIT
, report
= STRBUF_INIT
;
1442 const char *prefix
= NULL
;
1443 struct repository_format repo_fmt
= REPOSITORY_FORMAT_INIT
;
1446 * We may have read an incomplete configuration before
1447 * setting-up the git directory. If so, clear the cache so
1448 * that the next queries to the configuration reload complete
1449 * configuration (including the per-repo config file that we
1450 * ignored previously).
1455 * Let's assume that we are in a git repository.
1456 * If it turns out later that we are somewhere else, the value will be
1457 * updated accordingly.
1462 if (strbuf_getcwd(&cwd
))
1463 die_errno(_("Unable to read current working directory"));
1464 strbuf_addbuf(&dir
, &cwd
);
1466 switch (setup_git_directory_gently_1(&dir
, &gitdir
, &report
, 1)) {
1467 case GIT_DIR_EXPLICIT
:
1468 prefix
= setup_explicit_git_dir(gitdir
.buf
, &cwd
, &repo_fmt
, nongit_ok
);
1470 case GIT_DIR_DISCOVERED
:
1471 if (dir
.len
< cwd
.len
&& chdir(dir
.buf
))
1472 die(_("cannot change to '%s'"), dir
.buf
);
1473 prefix
= setup_discovered_git_dir(gitdir
.buf
, &cwd
, dir
.len
,
1474 &repo_fmt
, nongit_ok
);
1477 if (dir
.len
< cwd
.len
&& chdir(dir
.buf
))
1478 die(_("cannot change to '%s'"), dir
.buf
);
1479 prefix
= setup_bare_git_dir(&cwd
, dir
.len
, &repo_fmt
, nongit_ok
);
1481 case GIT_DIR_HIT_CEILING
:
1483 die(_("not a git repository (or any of the parent directories): %s"),
1484 DEFAULT_GIT_DIR_ENVIRONMENT
);
1487 case GIT_DIR_HIT_MOUNT_POINT
:
1489 die(_("not a git repository (or any parent up to mount point %s)\n"
1490 "Stopping at filesystem boundary (GIT_DISCOVERY_ACROSS_FILESYSTEM not set)."),
1494 case GIT_DIR_INVALID_OWNERSHIP
:
1496 struct strbuf quoted
= STRBUF_INIT
;
1498 strbuf_complete(&report
, '\n');
1499 sq_quote_buf_pretty("ed
, dir
.buf
);
1500 die(_("detected dubious ownership in repository at '%s'\n"
1502 "To add an exception for this directory, call:\n"
1504 "\tgit config --global --add safe.directory %s"),
1505 dir
.buf
, report
.buf
, quoted
.buf
);
1509 case GIT_DIR_DISALLOWED_BARE
:
1511 die(_("cannot use bare repository '%s' (safe.bareRepository is '%s')"),
1513 allowed_bare_repo_to_string(get_allowed_bare_repo()));
1517 case GIT_DIR_CWD_FAILURE
:
1518 case GIT_DIR_INVALID_FORMAT
:
1520 * As a safeguard against setup_git_directory_gently_1 returning
1521 * these values, fallthrough to BUG. Otherwise it is possible to
1522 * set startup_info->have_repository to 1 when we did nothing to
1523 * find a repository.
1526 BUG("unhandled setup_git_directory_gently_1() result");
1530 * At this point, nongit_ok is stable. If it is non-NULL and points
1531 * to a non-zero value, then this means that we haven't found a
1532 * repository and that the caller expects startup_info to reflect
1535 * Regardless of the state of nongit_ok, startup_info->prefix and
1536 * the GIT_PREFIX environment variable must always match. For details
1537 * see Documentation/config/alias.txt.
1539 if (nongit_ok
&& *nongit_ok
)
1540 startup_info
->have_repository
= 0;
1542 startup_info
->have_repository
= 1;
1545 * Not all paths through the setup code will call 'set_git_dir()' (which
1546 * directly sets up the environment) so in order to guarantee that the
1547 * environment is in a consistent state after setup, explicitly setup
1548 * the environment if we have a repository.
1550 * NEEDSWORK: currently we allow bogus GIT_DIR values to be set in some
1551 * code paths so we also need to explicitly setup the environment if
1552 * the user has set GIT_DIR. It may be beneficial to disallow bogus
1553 * GIT_DIR values at some point in the future.
1555 if (/* GIT_DIR_EXPLICIT, GIT_DIR_DISCOVERED, GIT_DIR_BARE */
1556 startup_info
->have_repository
||
1557 /* GIT_DIR_EXPLICIT */
1558 getenv(GIT_DIR_ENVIRONMENT
)) {
1559 if (!the_repository
->gitdir
) {
1560 const char *gitdir
= getenv(GIT_DIR_ENVIRONMENT
);
1562 gitdir
= DEFAULT_GIT_DIR_ENVIRONMENT
;
1563 setup_git_env(gitdir
);
1565 if (startup_info
->have_repository
) {
1566 repo_set_hash_algo(the_repository
, repo_fmt
.hash_algo
);
1567 the_repository
->repository_format_worktree_config
=
1568 repo_fmt
.worktree_config
;
1569 /* take ownership of repo_fmt.partial_clone */
1570 the_repository
->repository_format_partial_clone
=
1571 repo_fmt
.partial_clone
;
1572 repo_fmt
.partial_clone
= NULL
;
1576 * Since precompose_string_if_needed() needs to look at
1577 * the core.precomposeunicode configuration, this
1578 * has to happen after the above block that finds
1579 * out where the repository is, i.e. a preparation
1580 * for calling git_config_get_bool().
1583 prefix
= precompose_string_if_needed(prefix
);
1584 startup_info
->prefix
= prefix
;
1585 setenv(GIT_PREFIX_ENVIRONMENT
, prefix
, 1);
1587 startup_info
->prefix
= NULL
;
1588 setenv(GIT_PREFIX_ENVIRONMENT
, "", 1);
1591 setup_original_cwd();
1593 strbuf_release(&dir
);
1594 strbuf_release(&gitdir
);
1595 strbuf_release(&report
);
1596 clear_repository_format(&repo_fmt
);
1601 int git_config_perm(const char *var
, const char *value
)
1609 if (!strcmp(value
, "umask"))
1611 if (!strcmp(value
, "group"))
1613 if (!strcmp(value
, "all") ||
1614 !strcmp(value
, "world") ||
1615 !strcmp(value
, "everybody"))
1616 return PERM_EVERYBODY
;
1618 /* Parse octal numbers */
1619 i
= strtol(value
, &endptr
, 8);
1621 /* If not an octal number, maybe true/false? */
1623 return git_config_bool(var
, value
) ? PERM_GROUP
: PERM_UMASK
;
1626 * Treat values 0, 1 and 2 as compatibility cases, otherwise it is
1627 * a chmod value to restrict to.
1630 case PERM_UMASK
: /* 0 */
1632 case OLD_PERM_GROUP
: /* 1 */
1634 case OLD_PERM_EVERYBODY
: /* 2 */
1635 return PERM_EVERYBODY
;
1638 /* A filemode value was given: 0xxx */
1640 if ((i
& 0600) != 0600)
1641 die(_("problem with core.sharedRepository filemode value "
1642 "(0%.3o).\nThe owner of files must always have "
1643 "read and write permissions."), i
);
1646 * Mask filemode value. Others can not get write permission.
1647 * x flags for directories are handled separately.
1652 void check_repository_format(struct repository_format
*fmt
)
1654 struct repository_format repo_fmt
= REPOSITORY_FORMAT_INIT
;
1657 check_repository_format_gently(get_git_dir(), fmt
, NULL
);
1658 startup_info
->have_repository
= 1;
1659 repo_set_hash_algo(the_repository
, fmt
->hash_algo
);
1660 the_repository
->repository_format_worktree_config
=
1661 fmt
->worktree_config
;
1662 the_repository
->repository_format_partial_clone
=
1663 xstrdup_or_null(fmt
->partial_clone
);
1664 clear_repository_format(&repo_fmt
);
1668 * Returns the "prefix", a path to the current working directory
1669 * relative to the work tree root, or NULL, if the current working
1670 * directory is not a strict subdirectory of the work tree root. The
1671 * prefix always ends with a '/' character.
1673 const char *setup_git_directory(void)
1675 return setup_git_directory_gently(NULL
);
1678 const char *resolve_gitdir_gently(const char *suspect
, int *return_error_code
)
1680 if (is_git_directory(suspect
))
1682 return read_gitfile_gently(suspect
, return_error_code
);
1685 /* if any standard file descriptor is missing open it to /dev/null */
1686 void sanitize_stdfds(void)
1688 int fd
= xopen("/dev/null", O_RDWR
);
1697 #ifdef NO_POSIX_GOODIES
1705 die_errno(_("fork failed"));
1710 die_errno(_("setsid failed"));
1719 #ifdef NO_TRUSTABLE_FILEMODE
1720 #define TEST_FILEMODE 0
1722 #define TEST_FILEMODE 1
1725 #define GIT_DEFAULT_HASH_ENVIRONMENT "GIT_DEFAULT_HASH"
1727 static void copy_templates_1(struct strbuf
*path
, struct strbuf
*template_path
,
1730 size_t path_baselen
= path
->len
;
1731 size_t template_baselen
= template_path
->len
;
1734 /* Note: if ".git/hooks" file exists in the repository being
1735 * re-initialized, /etc/core-git/templates/hooks/update would
1736 * cause "git init" to fail here. I think this is sane but
1737 * it means that the set of templates we ship by default, along
1738 * with the way the namespace under .git/ is organized, should
1739 * be really carefully chosen.
1741 safe_create_dir(path
->buf
, 1);
1742 while ((de
= readdir(dir
)) != NULL
) {
1743 struct stat st_git
, st_template
;
1746 strbuf_setlen(path
, path_baselen
);
1747 strbuf_setlen(template_path
, template_baselen
);
1749 if (de
->d_name
[0] == '.')
1751 strbuf_addstr(path
, de
->d_name
);
1752 strbuf_addstr(template_path
, de
->d_name
);
1753 if (lstat(path
->buf
, &st_git
)) {
1754 if (errno
!= ENOENT
)
1755 die_errno(_("cannot stat '%s'"), path
->buf
);
1760 if (lstat(template_path
->buf
, &st_template
))
1761 die_errno(_("cannot stat template '%s'"), template_path
->buf
);
1763 if (S_ISDIR(st_template
.st_mode
)) {
1764 DIR *subdir
= opendir(template_path
->buf
);
1766 die_errno(_("cannot opendir '%s'"), template_path
->buf
);
1767 strbuf_addch(path
, '/');
1768 strbuf_addch(template_path
, '/');
1769 copy_templates_1(path
, template_path
, subdir
);
1774 else if (S_ISLNK(st_template
.st_mode
)) {
1775 struct strbuf lnk
= STRBUF_INIT
;
1776 if (strbuf_readlink(&lnk
, template_path
->buf
,
1777 st_template
.st_size
) < 0)
1778 die_errno(_("cannot readlink '%s'"), template_path
->buf
);
1779 if (symlink(lnk
.buf
, path
->buf
))
1780 die_errno(_("cannot symlink '%s' '%s'"),
1781 lnk
.buf
, path
->buf
);
1782 strbuf_release(&lnk
);
1784 else if (S_ISREG(st_template
.st_mode
)) {
1785 if (copy_file(path
->buf
, template_path
->buf
, st_template
.st_mode
))
1786 die_errno(_("cannot copy '%s' to '%s'"),
1787 template_path
->buf
, path
->buf
);
1790 error(_("ignoring template %s"), template_path
->buf
);
1794 static void copy_templates(const char *template_dir
, const char *init_template_dir
)
1796 struct strbuf path
= STRBUF_INIT
;
1797 struct strbuf template_path
= STRBUF_INIT
;
1798 size_t template_len
;
1799 struct repository_format template_format
= REPOSITORY_FORMAT_INIT
;
1800 struct strbuf err
= STRBUF_INIT
;
1802 char *to_free
= NULL
;
1805 template_dir
= getenv(TEMPLATE_DIR_ENVIRONMENT
);
1807 template_dir
= init_template_dir
;
1809 template_dir
= to_free
= system_path(DEFAULT_GIT_TEMPLATE_DIR
);
1810 if (!template_dir
[0]) {
1815 strbuf_addstr(&template_path
, template_dir
);
1816 strbuf_complete(&template_path
, '/');
1817 template_len
= template_path
.len
;
1819 dir
= opendir(template_path
.buf
);
1821 warning(_("templates not found in %s"), template_dir
);
1825 /* Make sure that template is from the correct vintage */
1826 strbuf_addstr(&template_path
, "config");
1827 read_repository_format(&template_format
, template_path
.buf
);
1828 strbuf_setlen(&template_path
, template_len
);
1831 * No mention of version at all is OK, but anything else should be
1834 if (template_format
.version
>= 0 &&
1835 verify_repository_format(&template_format
, &err
) < 0) {
1836 warning(_("not copying templates from '%s': %s"),
1837 template_dir
, err
.buf
);
1838 strbuf_release(&err
);
1839 goto close_free_return
;
1842 strbuf_addstr(&path
, get_git_common_dir());
1843 strbuf_complete(&path
, '/');
1844 copy_templates_1(&path
, &template_path
, dir
);
1849 strbuf_release(&path
);
1850 strbuf_release(&template_path
);
1851 clear_repository_format(&template_format
);
1855 * If the git_dir is not directly inside the working tree, then git will not
1856 * find it by default, and we need to set the worktree explicitly.
1858 static int needs_work_tree_config(const char *git_dir
, const char *work_tree
)
1860 if (!strcmp(work_tree
, "/") && !strcmp(git_dir
, "/.git"))
1862 if (skip_prefix(git_dir
, work_tree
, &git_dir
) &&
1863 !strcmp(git_dir
, "/.git"))
1868 void initialize_repository_version(int hash_algo
, int reinit
)
1870 char repo_version_string
[10];
1871 int repo_version
= GIT_REPO_VERSION
;
1873 if (hash_algo
!= GIT_HASH_SHA1
)
1874 repo_version
= GIT_REPO_VERSION_READ
;
1876 /* This forces creation of new config file */
1877 xsnprintf(repo_version_string
, sizeof(repo_version_string
),
1878 "%d", repo_version
);
1879 git_config_set("core.repositoryformatversion", repo_version_string
);
1881 if (hash_algo
!= GIT_HASH_SHA1
)
1882 git_config_set("extensions.objectformat",
1883 hash_algos
[hash_algo
].name
);
1885 git_config_set_gently("extensions.objectformat", NULL
);
1888 static int is_reinit(void)
1890 struct strbuf buf
= STRBUF_INIT
;
1894 git_path_buf(&buf
, "HEAD");
1895 ret
= !access(buf
.buf
, R_OK
) || readlink(buf
.buf
, junk
, sizeof(junk
) - 1) != -1;
1896 strbuf_release(&buf
);
1900 static void create_reference_database(const char *initial_branch
, int quiet
)
1902 struct strbuf err
= STRBUF_INIT
;
1903 int reinit
= is_reinit();
1906 * We need to create a "refs" dir in any case so that older versions of
1907 * Git can tell that this is a repository. This serves two main purposes:
1909 * - Clients will know to stop walking the parent-directory chain when
1910 * detecting the Git repository. Otherwise they may end up detecting
1911 * a Git repository in a parent directory instead.
1913 * - Instead of failing to detect a repository with unknown reference
1914 * format altogether, old clients will print an error saying that
1915 * they do not understand the reference format extension.
1917 safe_create_dir(git_path("refs"), 1);
1918 adjust_shared_perm(git_path("refs"));
1920 if (refs_init_db(&err
))
1921 die("failed to set up refs db: %s", err
.buf
);
1924 * Point the HEAD symref to the initial branch with if HEAD does
1930 if (!initial_branch
)
1931 initial_branch
= git_default_branch_name(quiet
);
1933 ref
= xstrfmt("refs/heads/%s", initial_branch
);
1934 if (check_refname_format(ref
, 0) < 0)
1935 die(_("invalid initial branch name: '%s'"),
1938 if (create_symref("HEAD", ref
, NULL
) < 0)
1943 if (reinit
&& initial_branch
)
1944 warning(_("re-init: ignored --initial-branch=%s"),
1947 strbuf_release(&err
);
1950 static int create_default_files(const char *template_path
,
1951 const char *original_git_dir
,
1952 const char *initial_branch
,
1953 const struct repository_format
*fmt
,
1954 int prev_bare_repository
,
1955 int init_shared_repository
,
1959 struct strbuf buf
= STRBUF_INIT
;
1963 const char *init_template_dir
= NULL
;
1964 const char *work_tree
= get_git_work_tree();
1967 * First copy the templates -- we might have the default
1968 * config file there, in which case we would want to read
1969 * from it after installing.
1971 * Before reading that config, we also need to clear out any cached
1972 * values (since we've just potentially changed what's available on
1975 git_config_get_pathname("init.templatedir", &init_template_dir
);
1976 copy_templates(template_path
, init_template_dir
);
1977 free((char *)init_template_dir
);
1979 reset_shared_repository();
1980 git_config(git_default_config
, NULL
);
1982 reinit
= is_reinit();
1985 * We must make sure command-line options continue to override any
1986 * values we might have just re-read from the config.
1988 if (init_shared_repository
!= -1)
1989 set_shared_repository(init_shared_repository
);
1991 * TODO: heed core.bare from config file in templates if no
1992 * command-line override given
1994 is_bare_repository_cfg
= prev_bare_repository
|| !work_tree
;
1995 /* TODO (continued):
1997 * Unfortunately, the line above is equivalent to
1998 * is_bare_repository_cfg = !work_tree;
1999 * which ignores the config entirely even if no `--[no-]bare`
2000 * command line option was present.
2002 * To see why, note that before this function, there was this call:
2003 * prev_bare_repository = is_bare_repository()
2004 * expanding the right hand side:
2005 * = is_bare_repository_cfg && !get_git_work_tree()
2006 * = is_bare_repository_cfg && !work_tree
2007 * note that the last simplification above is valid because nothing
2008 * calls repo_init() or set_git_work_tree() between any of the
2009 * relevant calls in the code, and thus the !get_git_work_tree()
2010 * calls will return the same result each time. So, what we are
2011 * interested in computing is the right hand side of the line of
2012 * code just above this comment:
2013 * prev_bare_repository || !work_tree
2014 * = is_bare_repository_cfg && !work_tree || !work_tree
2016 * because "A && !B || !B == !B" for all boolean values of A & B.
2020 * We would have created the above under user's umask -- under
2021 * shared-repository settings, we would need to fix them up.
2023 if (get_shared_repository()) {
2024 adjust_shared_perm(get_git_dir());
2027 create_reference_database(initial_branch
, quiet
);
2028 initialize_repository_version(fmt
->hash_algo
, 0);
2030 /* Check filemode trustability */
2031 path
= git_path_buf(&buf
, "config");
2032 filemode
= TEST_FILEMODE
;
2033 if (TEST_FILEMODE
&& !lstat(path
, &st1
)) {
2035 filemode
= (!chmod(path
, st1
.st_mode
^ S_IXUSR
) &&
2036 !lstat(path
, &st2
) &&
2037 st1
.st_mode
!= st2
.st_mode
&&
2038 !chmod(path
, st1
.st_mode
));
2039 if (filemode
&& !reinit
&& (st1
.st_mode
& S_IXUSR
))
2042 git_config_set("core.filemode", filemode
? "true" : "false");
2044 if (is_bare_repository())
2045 git_config_set("core.bare", "true");
2047 git_config_set("core.bare", "false");
2048 /* allow template config file to override the default */
2049 if (log_all_ref_updates
== LOG_REFS_UNSET
)
2050 git_config_set("core.logallrefupdates", "true");
2051 if (needs_work_tree_config(original_git_dir
, work_tree
))
2052 git_config_set("core.worktree", work_tree
);
2056 /* Check if symlink is supported in the work tree */
2057 path
= git_path_buf(&buf
, "tXXXXXX");
2058 if (!close(xmkstemp(path
)) &&
2060 !symlink("testing", path
) &&
2061 !lstat(path
, &st1
) &&
2062 S_ISLNK(st1
.st_mode
))
2063 unlink(path
); /* good */
2065 git_config_set("core.symlinks", "false");
2067 /* Check if the filesystem is case-insensitive */
2068 path
= git_path_buf(&buf
, "CoNfIg");
2069 if (!access(path
, F_OK
))
2070 git_config_set("core.ignorecase", "true");
2071 probe_utf8_pathname_composition();
2074 strbuf_release(&buf
);
2078 static void create_object_directory(void)
2080 struct strbuf path
= STRBUF_INIT
;
2083 strbuf_addstr(&path
, get_object_directory());
2086 safe_create_dir(path
.buf
, 1);
2088 strbuf_setlen(&path
, baselen
);
2089 strbuf_addstr(&path
, "/pack");
2090 safe_create_dir(path
.buf
, 1);
2092 strbuf_setlen(&path
, baselen
);
2093 strbuf_addstr(&path
, "/info");
2094 safe_create_dir(path
.buf
, 1);
2096 strbuf_release(&path
);
2099 static void separate_git_dir(const char *git_dir
, const char *git_link
)
2103 if (!stat(git_link
, &st
)) {
2106 if (S_ISREG(st
.st_mode
))
2107 src
= read_gitfile(git_link
);
2108 else if (S_ISDIR(st
.st_mode
))
2111 die(_("unable to handle file type %d"), (int)st
.st_mode
);
2113 if (rename(src
, git_dir
))
2114 die_errno(_("unable to move %s to %s"), src
, git_dir
);
2115 repair_worktrees(NULL
, NULL
);
2118 write_file(git_link
, "gitdir: %s", git_dir
);
2121 static void validate_hash_algorithm(struct repository_format
*repo_fmt
, int hash
)
2123 const char *env
= getenv(GIT_DEFAULT_HASH_ENVIRONMENT
);
2125 * If we already have an initialized repo, don't allow the user to
2126 * specify a different algorithm, as that could cause corruption.
2127 * Otherwise, if the user has specified one on the command line, use it.
2129 if (repo_fmt
->version
>= 0 && hash
!= GIT_HASH_UNKNOWN
&& hash
!= repo_fmt
->hash_algo
)
2130 die(_("attempt to reinitialize repository with different hash"));
2131 else if (hash
!= GIT_HASH_UNKNOWN
)
2132 repo_fmt
->hash_algo
= hash
;
2134 int env_algo
= hash_algo_by_name(env
);
2135 if (env_algo
== GIT_HASH_UNKNOWN
)
2136 die(_("unknown hash algorithm '%s'"), env
);
2137 repo_fmt
->hash_algo
= env_algo
;
2141 int init_db(const char *git_dir
, const char *real_git_dir
,
2142 const char *template_dir
, int hash
, const char *initial_branch
,
2143 int init_shared_repository
, unsigned int flags
)
2146 int exist_ok
= flags
& INIT_DB_EXIST_OK
;
2147 char *original_git_dir
= real_pathdup(git_dir
, 1);
2148 struct repository_format repo_fmt
= REPOSITORY_FORMAT_INIT
;
2149 int prev_bare_repository
;
2154 if (!exist_ok
&& !stat(git_dir
, &st
))
2155 die(_("%s already exists"), git_dir
);
2157 if (!exist_ok
&& !stat(real_git_dir
, &st
))
2158 die(_("%s already exists"), real_git_dir
);
2160 set_git_dir(real_git_dir
, 1);
2161 git_dir
= get_git_dir();
2162 separate_git_dir(git_dir
, original_git_dir
);
2165 set_git_dir(git_dir
, 1);
2166 git_dir
= get_git_dir();
2168 startup_info
->have_repository
= 1;
2170 /* Ensure `core.hidedotfiles` is processed */
2171 git_config(platform_core_config
, NULL
);
2173 safe_create_dir(git_dir
, 0);
2175 prev_bare_repository
= is_bare_repository();
2177 /* Check to see if the repository version is right.
2178 * Note that a newly created repository does not have
2179 * config file, so this will not fail. What we are catching
2180 * is an attempt to reinitialize new repository with an old tool.
2182 check_repository_format(&repo_fmt
);
2184 validate_hash_algorithm(&repo_fmt
, hash
);
2186 reinit
= create_default_files(template_dir
, original_git_dir
,
2187 initial_branch
, &repo_fmt
,
2188 prev_bare_repository
,
2189 init_shared_repository
,
2190 flags
& INIT_DB_QUIET
);
2192 create_object_directory();
2194 if (get_shared_repository()) {
2196 /* We do not spell "group" and such, so that
2197 * the configuration can be read by older version
2198 * of git. Note, we use octal numbers for new share modes,
2199 * and compatibility values for PERM_GROUP and
2202 if (get_shared_repository() < 0)
2203 /* force to the mode value */
2204 xsnprintf(buf
, sizeof(buf
), "0%o", -get_shared_repository());
2205 else if (get_shared_repository() == PERM_GROUP
)
2206 xsnprintf(buf
, sizeof(buf
), "%d", OLD_PERM_GROUP
);
2207 else if (get_shared_repository() == PERM_EVERYBODY
)
2208 xsnprintf(buf
, sizeof(buf
), "%d", OLD_PERM_EVERYBODY
);
2210 BUG("invalid value for shared_repository");
2211 git_config_set("core.sharedrepository", buf
);
2212 git_config_set("receive.denyNonFastforwards", "true");
2215 if (!(flags
& INIT_DB_QUIET
)) {
2216 int len
= strlen(git_dir
);
2219 printf(get_shared_repository()
2220 ? _("Reinitialized existing shared Git repository in %s%s\n")
2221 : _("Reinitialized existing Git repository in %s%s\n"),
2222 git_dir
, len
&& git_dir
[len
-1] != '/' ? "/" : "");
2224 printf(get_shared_repository()
2225 ? _("Initialized empty shared Git repository in %s%s\n")
2226 : _("Initialized empty Git repository in %s%s\n"),
2227 git_dir
, len
&& git_dir
[len
-1] != '/' ? "/" : "");
2230 clear_repository_format(&repo_fmt
);
2231 free(original_git_dir
);