2 * The backend-independent part of the reference module.
11 #include "refs/refs-internal.h"
14 #include "submodule.h"
16 #include "argv-array.h"
17 #include "repository.h"
20 * List of all available backends
22 static struct ref_storage_be
*refs_backends
= &refs_be_files
;
24 static struct ref_storage_be
*find_ref_storage_backend(const char *name
)
26 struct ref_storage_be
*be
;
27 for (be
= refs_backends
; be
; be
= be
->next
)
28 if (!strcmp(be
->name
, name
))
33 int ref_storage_backend_exists(const char *name
)
35 return find_ref_storage_backend(name
) != NULL
;
39 * How to handle various characters in refnames:
40 * 0: An acceptable character for refs
42 * 2: ., look for a preceding . to reject .. in refs
43 * 3: {, look for a preceding @ to reject @{ in refs
44 * 4: A bad character: ASCII control characters, and
45 * ":", "?", "[", "\", "^", "~", SP, or TAB
46 * 5: *, reject unless REFNAME_REFSPEC_PATTERN is set
48 static unsigned char refname_disposition
[256] = {
49 1, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
50 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
51 4, 0, 0, 0, 0, 0, 0, 0, 0, 0, 5, 0, 0, 0, 2, 1,
52 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 4, 0, 0, 0, 0, 4,
53 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
54 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 4, 4, 0, 4, 0,
55 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
56 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3, 0, 0, 4, 4
60 * Try to read one refname component from the front of refname.
61 * Return the length of the component found, or -1 if the component is
62 * not legal. It is legal if it is something reasonable to have under
63 * ".git/refs/"; We do not like it if:
65 * - any path component of it begins with ".", or
66 * - it has double dots "..", or
67 * - it has ASCII control characters, or
68 * - it has ":", "?", "[", "\", "^", "~", SP, or TAB anywhere, or
69 * - it has "*" anywhere unless REFNAME_REFSPEC_PATTERN is set, or
70 * - it ends with a "/", or
71 * - it ends with ".lock", or
72 * - it contains a "@{" portion
74 static int check_refname_component(const char *refname
, int *flags
)
79 for (cp
= refname
; ; cp
++) {
81 unsigned char disp
= refname_disposition
[ch
];
87 return -1; /* Refname contains "..". */
91 return -1; /* Refname contains "@{". */
96 if (!(*flags
& REFNAME_REFSPEC_PATTERN
))
97 return -1; /* refspec can't be a pattern */
100 * Unset the pattern flag so that we only accept
101 * a single asterisk for one side of refspec.
103 *flags
&= ~ REFNAME_REFSPEC_PATTERN
;
110 return 0; /* Component has zero length. */
111 if (refname
[0] == '.')
112 return -1; /* Component starts with '.'. */
113 if (cp
- refname
>= LOCK_SUFFIX_LEN
&&
114 !memcmp(cp
- LOCK_SUFFIX_LEN
, LOCK_SUFFIX
, LOCK_SUFFIX_LEN
))
115 return -1; /* Refname ends with ".lock". */
119 int check_refname_format(const char *refname
, int flags
)
121 int component_len
, component_count
= 0;
123 if (!strcmp(refname
, "@"))
124 /* Refname is a single character '@'. */
128 /* We are at the start of a path component. */
129 component_len
= check_refname_component(refname
, &flags
);
130 if (component_len
<= 0)
134 if (refname
[component_len
] == '\0')
136 /* Skip to next component. */
137 refname
+= component_len
+ 1;
140 if (refname
[component_len
- 1] == '.')
141 return -1; /* Refname ends with '.'. */
142 if (!(flags
& REFNAME_ALLOW_ONELEVEL
) && component_count
< 2)
143 return -1; /* Refname has only one component. */
147 int refname_is_safe(const char *refname
)
151 if (skip_prefix(refname
, "refs/", &rest
)) {
154 size_t restlen
= strlen(rest
);
156 /* rest must not be empty, or start or end with "/" */
157 if (!restlen
|| *rest
== '/' || rest
[restlen
- 1] == '/')
161 * Does the refname try to escape refs/?
162 * For example: refs/foo/../bar is safe but refs/foo/../../bar
165 buf
= xmallocz(restlen
);
166 result
= !normalize_path_copy(buf
, rest
) && !strcmp(buf
, rest
);
172 if (!isupper(*refname
) && *refname
!= '_')
180 * Return true if refname, which has the specified oid and flags, can
181 * be resolved to an object in the database. If the referred-to object
182 * does not exist, emit a warning and return false.
184 int ref_resolves_to_object(const char *refname
,
185 const struct object_id
*oid
,
188 if (flags
& REF_ISBROKEN
)
190 if (!has_sha1_file(oid
->hash
)) {
191 error("%s does not point to a valid object!", refname
);
197 char *refs_resolve_refdup(struct ref_store
*refs
,
198 const char *refname
, int resolve_flags
,
199 struct object_id
*oid
, int *flags
)
203 result
= refs_resolve_ref_unsafe(refs
, refname
, resolve_flags
,
205 return xstrdup_or_null(result
);
208 char *resolve_refdup(const char *refname
, int resolve_flags
,
209 struct object_id
*oid
, int *flags
)
211 return refs_resolve_refdup(get_main_ref_store(the_repository
),
212 refname
, resolve_flags
,
216 /* The argument to filter_refs */
223 int refs_read_ref_full(struct ref_store
*refs
, const char *refname
,
224 int resolve_flags
, struct object_id
*oid
, int *flags
)
226 if (refs_resolve_ref_unsafe(refs
, refname
, resolve_flags
, oid
, flags
))
231 int read_ref_full(const char *refname
, int resolve_flags
, struct object_id
*oid
, int *flags
)
233 return refs_read_ref_full(get_main_ref_store(the_repository
), refname
,
234 resolve_flags
, oid
, flags
);
237 int read_ref(const char *refname
, struct object_id
*oid
)
239 return read_ref_full(refname
, RESOLVE_REF_READING
, oid
, NULL
);
242 int ref_exists(const char *refname
)
244 return !!resolve_ref_unsafe(refname
, RESOLVE_REF_READING
, NULL
, NULL
);
247 static int match_ref_pattern(const char *refname
,
248 const struct string_list_item
*item
)
251 if (item
->util
== NULL
) {
252 if (!wildmatch(item
->string
, refname
, 0))
256 if (skip_prefix(refname
, item
->string
, &rest
) &&
257 (!*rest
|| *rest
== '/'))
263 int ref_filter_match(const char *refname
,
264 const struct string_list
*include_patterns
,
265 const struct string_list
*exclude_patterns
)
267 struct string_list_item
*item
;
269 if (exclude_patterns
&& exclude_patterns
->nr
) {
270 for_each_string_list_item(item
, exclude_patterns
) {
271 if (match_ref_pattern(refname
, item
))
276 if (include_patterns
&& include_patterns
->nr
) {
278 for_each_string_list_item(item
, include_patterns
) {
279 if (match_ref_pattern(refname
, item
)) {
291 static int filter_refs(const char *refname
, const struct object_id
*oid
,
292 int flags
, void *data
)
294 struct ref_filter
*filter
= (struct ref_filter
*)data
;
296 if (wildmatch(filter
->pattern
, refname
, 0))
298 return filter
->fn(refname
, oid
, flags
, filter
->cb_data
);
301 enum peel_status
peel_object(const struct object_id
*name
, struct object_id
*oid
)
303 struct object
*o
= lookup_unknown_object(name
->hash
);
305 if (o
->type
== OBJ_NONE
) {
306 int type
= oid_object_info(the_repository
, name
, NULL
);
307 if (type
< 0 || !object_as_type(o
, type
, 0))
311 if (o
->type
!= OBJ_TAG
)
314 o
= deref_tag_noverify(o
);
318 oidcpy(oid
, &o
->oid
);
322 struct warn_if_dangling_data
{
325 const struct string_list
*refnames
;
329 static int warn_if_dangling_symref(const char *refname
, const struct object_id
*oid
,
330 int flags
, void *cb_data
)
332 struct warn_if_dangling_data
*d
= cb_data
;
333 const char *resolves_to
;
335 if (!(flags
& REF_ISSYMREF
))
338 resolves_to
= resolve_ref_unsafe(refname
, 0, NULL
, NULL
);
341 ? strcmp(resolves_to
, d
->refname
)
342 : !string_list_has_string(d
->refnames
, resolves_to
))) {
346 fprintf(d
->fp
, d
->msg_fmt
, refname
);
351 void warn_dangling_symref(FILE *fp
, const char *msg_fmt
, const char *refname
)
353 struct warn_if_dangling_data data
;
356 data
.refname
= refname
;
357 data
.refnames
= NULL
;
358 data
.msg_fmt
= msg_fmt
;
359 for_each_rawref(warn_if_dangling_symref
, &data
);
362 void warn_dangling_symrefs(FILE *fp
, const char *msg_fmt
, const struct string_list
*refnames
)
364 struct warn_if_dangling_data data
;
368 data
.refnames
= refnames
;
369 data
.msg_fmt
= msg_fmt
;
370 for_each_rawref(warn_if_dangling_symref
, &data
);
373 int refs_for_each_tag_ref(struct ref_store
*refs
, each_ref_fn fn
, void *cb_data
)
375 return refs_for_each_ref_in(refs
, "refs/tags/", fn
, cb_data
);
378 int for_each_tag_ref(each_ref_fn fn
, void *cb_data
)
380 return refs_for_each_tag_ref(get_main_ref_store(the_repository
), fn
, cb_data
);
383 int refs_for_each_branch_ref(struct ref_store
*refs
, each_ref_fn fn
, void *cb_data
)
385 return refs_for_each_ref_in(refs
, "refs/heads/", fn
, cb_data
);
388 int for_each_branch_ref(each_ref_fn fn
, void *cb_data
)
390 return refs_for_each_branch_ref(get_main_ref_store(the_repository
), fn
, cb_data
);
393 int refs_for_each_remote_ref(struct ref_store
*refs
, each_ref_fn fn
, void *cb_data
)
395 return refs_for_each_ref_in(refs
, "refs/remotes/", fn
, cb_data
);
398 int for_each_remote_ref(each_ref_fn fn
, void *cb_data
)
400 return refs_for_each_remote_ref(get_main_ref_store(the_repository
), fn
, cb_data
);
403 int head_ref_namespaced(each_ref_fn fn
, void *cb_data
)
405 struct strbuf buf
= STRBUF_INIT
;
407 struct object_id oid
;
410 strbuf_addf(&buf
, "%sHEAD", get_git_namespace());
411 if (!read_ref_full(buf
.buf
, RESOLVE_REF_READING
, &oid
, &flag
))
412 ret
= fn(buf
.buf
, &oid
, flag
, cb_data
);
413 strbuf_release(&buf
);
418 void normalize_glob_ref(struct string_list_item
*item
, const char *prefix
,
421 struct strbuf normalized_pattern
= STRBUF_INIT
;
424 BUG("pattern must not start with '/'");
427 strbuf_addstr(&normalized_pattern
, prefix
);
429 else if (!starts_with(pattern
, "refs/"))
430 strbuf_addstr(&normalized_pattern
, "refs/");
431 strbuf_addstr(&normalized_pattern
, pattern
);
432 strbuf_strip_suffix(&normalized_pattern
, "/");
434 item
->string
= strbuf_detach(&normalized_pattern
, NULL
);
435 item
->util
= has_glob_specials(pattern
) ? NULL
: item
->string
;
436 strbuf_release(&normalized_pattern
);
439 int for_each_glob_ref_in(each_ref_fn fn
, const char *pattern
,
440 const char *prefix
, void *cb_data
)
442 struct strbuf real_pattern
= STRBUF_INIT
;
443 struct ref_filter filter
;
446 if (!prefix
&& !starts_with(pattern
, "refs/"))
447 strbuf_addstr(&real_pattern
, "refs/");
449 strbuf_addstr(&real_pattern
, prefix
);
450 strbuf_addstr(&real_pattern
, pattern
);
452 if (!has_glob_specials(pattern
)) {
453 /* Append implied '/' '*' if not present. */
454 strbuf_complete(&real_pattern
, '/');
455 /* No need to check for '*', there is none. */
456 strbuf_addch(&real_pattern
, '*');
459 filter
.pattern
= real_pattern
.buf
;
461 filter
.cb_data
= cb_data
;
462 ret
= for_each_ref(filter_refs
, &filter
);
464 strbuf_release(&real_pattern
);
468 int for_each_glob_ref(each_ref_fn fn
, const char *pattern
, void *cb_data
)
470 return for_each_glob_ref_in(fn
, pattern
, NULL
, cb_data
);
473 const char *prettify_refname(const char *name
)
475 if (skip_prefix(name
, "refs/heads/", &name
) ||
476 skip_prefix(name
, "refs/tags/", &name
) ||
477 skip_prefix(name
, "refs/remotes/", &name
))
482 static const char *ref_rev_parse_rules
[] = {
488 "refs/remotes/%.*s/HEAD",
492 int refname_match(const char *abbrev_name
, const char *full_name
)
495 const int abbrev_name_len
= strlen(abbrev_name
);
497 for (p
= ref_rev_parse_rules
; *p
; p
++) {
498 if (!strcmp(full_name
, mkpath(*p
, abbrev_name_len
, abbrev_name
))) {
507 * Given a 'prefix' expand it by the rules in 'ref_rev_parse_rules' and add
508 * the results to 'prefixes'
510 void expand_ref_prefix(struct argv_array
*prefixes
, const char *prefix
)
513 int len
= strlen(prefix
);
515 for (p
= ref_rev_parse_rules
; *p
; p
++)
516 argv_array_pushf(prefixes
, *p
, len
, prefix
);
520 * *string and *len will only be substituted, and *string returned (for
521 * later free()ing) if the string passed in is a magic short-hand form
524 static char *substitute_branch_name(const char **string
, int *len
)
526 struct strbuf buf
= STRBUF_INIT
;
527 int ret
= interpret_branch_name(*string
, *len
, &buf
, 0);
531 *string
= strbuf_detach(&buf
, &size
);
533 return (char *)*string
;
539 int dwim_ref(const char *str
, int len
, struct object_id
*oid
, char **ref
)
541 char *last_branch
= substitute_branch_name(&str
, &len
);
542 int refs_found
= expand_ref(str
, len
, oid
, ref
);
547 int expand_ref(const char *str
, int len
, struct object_id
*oid
, char **ref
)
551 struct strbuf fullref
= STRBUF_INIT
;
554 for (p
= ref_rev_parse_rules
; *p
; p
++) {
555 struct object_id oid_from_ref
;
556 struct object_id
*this_result
;
559 this_result
= refs_found
? &oid_from_ref
: oid
;
560 strbuf_reset(&fullref
);
561 strbuf_addf(&fullref
, *p
, len
, str
);
562 r
= resolve_ref_unsafe(fullref
.buf
, RESOLVE_REF_READING
,
567 if (!warn_ambiguous_refs
)
569 } else if ((flag
& REF_ISSYMREF
) && strcmp(fullref
.buf
, "HEAD")) {
570 warning("ignoring dangling symref %s.", fullref
.buf
);
571 } else if ((flag
& REF_ISBROKEN
) && strchr(fullref
.buf
, '/')) {
572 warning("ignoring broken ref %s.", fullref
.buf
);
575 strbuf_release(&fullref
);
579 int dwim_log(const char *str
, int len
, struct object_id
*oid
, char **log
)
581 char *last_branch
= substitute_branch_name(&str
, &len
);
584 struct strbuf path
= STRBUF_INIT
;
587 for (p
= ref_rev_parse_rules
; *p
; p
++) {
588 struct object_id hash
;
589 const char *ref
, *it
;
592 strbuf_addf(&path
, *p
, len
, str
);
593 ref
= resolve_ref_unsafe(path
.buf
, RESOLVE_REF_READING
,
597 if (reflog_exists(path
.buf
))
599 else if (strcmp(ref
, path
.buf
) && reflog_exists(ref
))
607 if (!warn_ambiguous_refs
)
610 strbuf_release(&path
);
615 static int is_per_worktree_ref(const char *refname
)
617 return !strcmp(refname
, "HEAD") ||
618 starts_with(refname
, "refs/bisect/");
621 static int is_pseudoref_syntax(const char *refname
)
625 for (c
= refname
; *c
; c
++) {
626 if (!isupper(*c
) && *c
!= '-' && *c
!= '_')
633 enum ref_type
ref_type(const char *refname
)
635 if (is_per_worktree_ref(refname
))
636 return REF_TYPE_PER_WORKTREE
;
637 if (is_pseudoref_syntax(refname
))
638 return REF_TYPE_PSEUDOREF
;
639 return REF_TYPE_NORMAL
;
642 long get_files_ref_lock_timeout_ms(void)
644 static int configured
= 0;
646 /* The default timeout is 100 ms: */
647 static int timeout_ms
= 100;
650 git_config_get_int("core.filesreflocktimeout", &timeout_ms
);
657 static int write_pseudoref(const char *pseudoref
, const struct object_id
*oid
,
658 const struct object_id
*old_oid
, struct strbuf
*err
)
660 const char *filename
;
662 static struct lock_file lock
;
663 struct strbuf buf
= STRBUF_INIT
;
669 strbuf_addf(&buf
, "%s\n", oid_to_hex(oid
));
671 filename
= git_path("%s", pseudoref
);
672 fd
= hold_lock_file_for_update_timeout(&lock
, filename
,
674 get_files_ref_lock_timeout_ms());
676 strbuf_addf(err
, "could not open '%s' for writing: %s",
677 filename
, strerror(errno
));
682 struct object_id actual_old_oid
;
684 if (read_ref(pseudoref
, &actual_old_oid
))
685 die("could not read ref '%s'", pseudoref
);
686 if (oidcmp(&actual_old_oid
, old_oid
)) {
687 strbuf_addf(err
, "unexpected sha1 when writing '%s'", pseudoref
);
688 rollback_lock_file(&lock
);
693 if (write_in_full(fd
, buf
.buf
, buf
.len
) < 0) {
694 strbuf_addf(err
, "could not write to '%s'", filename
);
695 rollback_lock_file(&lock
);
699 commit_lock_file(&lock
);
702 strbuf_release(&buf
);
706 static int delete_pseudoref(const char *pseudoref
, const struct object_id
*old_oid
)
708 static struct lock_file lock
;
709 const char *filename
;
711 filename
= git_path("%s", pseudoref
);
713 if (old_oid
&& !is_null_oid(old_oid
)) {
715 struct object_id actual_old_oid
;
717 fd
= hold_lock_file_for_update_timeout(
718 &lock
, filename
, LOCK_DIE_ON_ERROR
,
719 get_files_ref_lock_timeout_ms());
721 die_errno(_("Could not open '%s' for writing"), filename
);
722 if (read_ref(pseudoref
, &actual_old_oid
))
723 die("could not read ref '%s'", pseudoref
);
724 if (oidcmp(&actual_old_oid
, old_oid
)) {
725 warning("Unexpected sha1 when deleting %s", pseudoref
);
726 rollback_lock_file(&lock
);
731 rollback_lock_file(&lock
);
739 int refs_delete_ref(struct ref_store
*refs
, const char *msg
,
741 const struct object_id
*old_oid
,
744 struct ref_transaction
*transaction
;
745 struct strbuf err
= STRBUF_INIT
;
747 if (ref_type(refname
) == REF_TYPE_PSEUDOREF
) {
748 assert(refs
== get_main_ref_store(the_repository
));
749 return delete_pseudoref(refname
, old_oid
);
752 transaction
= ref_store_transaction_begin(refs
, &err
);
754 ref_transaction_delete(transaction
, refname
, old_oid
,
756 ref_transaction_commit(transaction
, &err
)) {
757 error("%s", err
.buf
);
758 ref_transaction_free(transaction
);
759 strbuf_release(&err
);
762 ref_transaction_free(transaction
);
763 strbuf_release(&err
);
767 int delete_ref(const char *msg
, const char *refname
,
768 const struct object_id
*old_oid
, unsigned int flags
)
770 return refs_delete_ref(get_main_ref_store(the_repository
), msg
, refname
,
774 int copy_reflog_msg(char *buf
, const char *msg
)
781 while ((c
= *msg
++)) {
782 if (wasspace
&& isspace(c
))
784 wasspace
= isspace(c
);
789 while (buf
< cp
&& isspace(cp
[-1]))
795 int should_autocreate_reflog(const char *refname
)
797 switch (log_all_ref_updates
) {
798 case LOG_REFS_ALWAYS
:
800 case LOG_REFS_NORMAL
:
801 return starts_with(refname
, "refs/heads/") ||
802 starts_with(refname
, "refs/remotes/") ||
803 starts_with(refname
, "refs/notes/") ||
804 !strcmp(refname
, "HEAD");
810 int is_branch(const char *refname
)
812 return !strcmp(refname
, "HEAD") || starts_with(refname
, "refs/heads/");
815 struct read_ref_at_cb
{
820 struct object_id
*oid
;
823 struct object_id ooid
;
824 struct object_id noid
;
828 timestamp_t
*cutoff_time
;
833 static int read_ref_at_ent(struct object_id
*ooid
, struct object_id
*noid
,
834 const char *email
, timestamp_t timestamp
, int tz
,
835 const char *message
, void *cb_data
)
837 struct read_ref_at_cb
*cb
= cb_data
;
841 cb
->date
= timestamp
;
843 if (timestamp
<= cb
->at_time
|| cb
->cnt
== 0) {
845 *cb
->msg
= xstrdup(message
);
847 *cb
->cutoff_time
= timestamp
;
851 *cb
->cutoff_cnt
= cb
->reccnt
- 1;
853 * we have not yet updated cb->[n|o]oid so they still
854 * hold the values for the previous record.
856 if (!is_null_oid(&cb
->ooid
)) {
857 oidcpy(cb
->oid
, noid
);
858 if (oidcmp(&cb
->ooid
, noid
))
859 warning("Log for ref %s has gap after %s.",
860 cb
->refname
, show_date(cb
->date
, cb
->tz
, DATE_MODE(RFC2822
)));
862 else if (cb
->date
== cb
->at_time
)
863 oidcpy(cb
->oid
, noid
);
864 else if (oidcmp(noid
, cb
->oid
))
865 warning("Log for ref %s unexpectedly ended on %s.",
866 cb
->refname
, show_date(cb
->date
, cb
->tz
,
867 DATE_MODE(RFC2822
)));
868 oidcpy(&cb
->ooid
, ooid
);
869 oidcpy(&cb
->noid
, noid
);
873 oidcpy(&cb
->ooid
, ooid
);
874 oidcpy(&cb
->noid
, noid
);
880 static int read_ref_at_ent_oldest(struct object_id
*ooid
, struct object_id
*noid
,
881 const char *email
, timestamp_t timestamp
,
882 int tz
, const char *message
, void *cb_data
)
884 struct read_ref_at_cb
*cb
= cb_data
;
887 *cb
->msg
= xstrdup(message
);
889 *cb
->cutoff_time
= timestamp
;
893 *cb
->cutoff_cnt
= cb
->reccnt
;
894 oidcpy(cb
->oid
, ooid
);
895 if (is_null_oid(cb
->oid
))
896 oidcpy(cb
->oid
, noid
);
897 /* We just want the first entry */
901 int read_ref_at(const char *refname
, unsigned int flags
, timestamp_t at_time
, int cnt
,
902 struct object_id
*oid
, char **msg
,
903 timestamp_t
*cutoff_time
, int *cutoff_tz
, int *cutoff_cnt
)
905 struct read_ref_at_cb cb
;
907 memset(&cb
, 0, sizeof(cb
));
908 cb
.refname
= refname
;
909 cb
.at_time
= at_time
;
912 cb
.cutoff_time
= cutoff_time
;
913 cb
.cutoff_tz
= cutoff_tz
;
914 cb
.cutoff_cnt
= cutoff_cnt
;
917 for_each_reflog_ent_reverse(refname
, read_ref_at_ent
, &cb
);
920 if (flags
& GET_OID_QUIETLY
)
923 die("Log for %s is empty.", refname
);
928 for_each_reflog_ent(refname
, read_ref_at_ent_oldest
, &cb
);
933 struct ref_transaction
*ref_store_transaction_begin(struct ref_store
*refs
,
936 struct ref_transaction
*tr
;
939 tr
= xcalloc(1, sizeof(struct ref_transaction
));
940 tr
->ref_store
= refs
;
944 struct ref_transaction
*ref_transaction_begin(struct strbuf
*err
)
946 return ref_store_transaction_begin(get_main_ref_store(the_repository
), err
);
949 void ref_transaction_free(struct ref_transaction
*transaction
)
956 switch (transaction
->state
) {
957 case REF_TRANSACTION_OPEN
:
958 case REF_TRANSACTION_CLOSED
:
961 case REF_TRANSACTION_PREPARED
:
962 die("BUG: free called on a prepared reference transaction");
965 die("BUG: unexpected reference transaction state");
969 for (i
= 0; i
< transaction
->nr
; i
++) {
970 free(transaction
->updates
[i
]->msg
);
971 free(transaction
->updates
[i
]);
973 free(transaction
->updates
);
977 struct ref_update
*ref_transaction_add_update(
978 struct ref_transaction
*transaction
,
979 const char *refname
, unsigned int flags
,
980 const struct object_id
*new_oid
,
981 const struct object_id
*old_oid
,
984 struct ref_update
*update
;
986 if (transaction
->state
!= REF_TRANSACTION_OPEN
)
987 die("BUG: update called for transaction that is not open");
989 FLEX_ALLOC_STR(update
, refname
, refname
);
990 ALLOC_GROW(transaction
->updates
, transaction
->nr
+ 1, transaction
->alloc
);
991 transaction
->updates
[transaction
->nr
++] = update
;
993 update
->flags
= flags
;
995 if (flags
& REF_HAVE_NEW
)
996 oidcpy(&update
->new_oid
, new_oid
);
997 if (flags
& REF_HAVE_OLD
)
998 oidcpy(&update
->old_oid
, old_oid
);
999 update
->msg
= xstrdup_or_null(msg
);
1003 int ref_transaction_update(struct ref_transaction
*transaction
,
1004 const char *refname
,
1005 const struct object_id
*new_oid
,
1006 const struct object_id
*old_oid
,
1007 unsigned int flags
, const char *msg
,
1012 if ((new_oid
&& !is_null_oid(new_oid
)) ?
1013 check_refname_format(refname
, REFNAME_ALLOW_ONELEVEL
) :
1014 !refname_is_safe(refname
)) {
1015 strbuf_addf(err
, "refusing to update ref with bad name '%s'",
1020 if (flags
& ~REF_TRANSACTION_UPDATE_ALLOWED_FLAGS
)
1021 BUG("illegal flags 0x%x passed to ref_transaction_update()", flags
);
1023 flags
|= (new_oid
? REF_HAVE_NEW
: 0) | (old_oid
? REF_HAVE_OLD
: 0);
1025 ref_transaction_add_update(transaction
, refname
, flags
,
1026 new_oid
, old_oid
, msg
);
1030 int ref_transaction_create(struct ref_transaction
*transaction
,
1031 const char *refname
,
1032 const struct object_id
*new_oid
,
1033 unsigned int flags
, const char *msg
,
1036 if (!new_oid
|| is_null_oid(new_oid
))
1037 die("BUG: create called without valid new_oid");
1038 return ref_transaction_update(transaction
, refname
, new_oid
,
1039 &null_oid
, flags
, msg
, err
);
1042 int ref_transaction_delete(struct ref_transaction
*transaction
,
1043 const char *refname
,
1044 const struct object_id
*old_oid
,
1045 unsigned int flags
, const char *msg
,
1048 if (old_oid
&& is_null_oid(old_oid
))
1049 die("BUG: delete called with old_oid set to zeros");
1050 return ref_transaction_update(transaction
, refname
,
1055 int ref_transaction_verify(struct ref_transaction
*transaction
,
1056 const char *refname
,
1057 const struct object_id
*old_oid
,
1062 die("BUG: verify called with old_oid set to NULL");
1063 return ref_transaction_update(transaction
, refname
,
1068 int refs_update_ref(struct ref_store
*refs
, const char *msg
,
1069 const char *refname
, const struct object_id
*new_oid
,
1070 const struct object_id
*old_oid
, unsigned int flags
,
1071 enum action_on_err onerr
)
1073 struct ref_transaction
*t
= NULL
;
1074 struct strbuf err
= STRBUF_INIT
;
1077 if (ref_type(refname
) == REF_TYPE_PSEUDOREF
) {
1078 assert(refs
== get_main_ref_store(the_repository
));
1079 ret
= write_pseudoref(refname
, new_oid
, old_oid
, &err
);
1081 t
= ref_store_transaction_begin(refs
, &err
);
1083 ref_transaction_update(t
, refname
, new_oid
, old_oid
,
1084 flags
, msg
, &err
) ||
1085 ref_transaction_commit(t
, &err
)) {
1087 ref_transaction_free(t
);
1091 const char *str
= "update_ref failed for ref '%s': %s";
1094 case UPDATE_REFS_MSG_ON_ERR
:
1095 error(str
, refname
, err
.buf
);
1097 case UPDATE_REFS_DIE_ON_ERR
:
1098 die(str
, refname
, err
.buf
);
1100 case UPDATE_REFS_QUIET_ON_ERR
:
1103 strbuf_release(&err
);
1106 strbuf_release(&err
);
1108 ref_transaction_free(t
);
1112 int update_ref(const char *msg
, const char *refname
,
1113 const struct object_id
*new_oid
,
1114 const struct object_id
*old_oid
,
1115 unsigned int flags
, enum action_on_err onerr
)
1117 return refs_update_ref(get_main_ref_store(the_repository
), msg
, refname
, new_oid
,
1118 old_oid
, flags
, onerr
);
1121 char *shorten_unambiguous_ref(const char *refname
, int strict
)
1124 static char **scanf_fmts
;
1125 static int nr_rules
;
1127 struct strbuf resolved_buf
= STRBUF_INIT
;
1131 * Pre-generate scanf formats from ref_rev_parse_rules[].
1132 * Generate a format suitable for scanf from a
1133 * ref_rev_parse_rules rule by interpolating "%s" at the
1134 * location of the "%.*s".
1136 size_t total_len
= 0;
1139 /* the rule list is NULL terminated, count them first */
1140 for (nr_rules
= 0; ref_rev_parse_rules
[nr_rules
]; nr_rules
++)
1141 /* -2 for strlen("%.*s") - strlen("%s"); +1 for NUL */
1142 total_len
+= strlen(ref_rev_parse_rules
[nr_rules
]) - 2 + 1;
1144 scanf_fmts
= xmalloc(st_add(st_mult(sizeof(char *), nr_rules
), total_len
));
1147 for (i
= 0; i
< nr_rules
; i
++) {
1148 assert(offset
< total_len
);
1149 scanf_fmts
[i
] = (char *)&scanf_fmts
[nr_rules
] + offset
;
1150 offset
+= snprintf(scanf_fmts
[i
], total_len
- offset
,
1151 ref_rev_parse_rules
[i
], 2, "%s") + 1;
1155 /* bail out if there are no rules */
1157 return xstrdup(refname
);
1159 /* buffer for scanf result, at most refname must fit */
1160 short_name
= xstrdup(refname
);
1162 /* skip first rule, it will always match */
1163 for (i
= nr_rules
- 1; i
> 0 ; --i
) {
1165 int rules_to_fail
= i
;
1168 if (1 != sscanf(refname
, scanf_fmts
[i
], short_name
))
1171 short_name_len
= strlen(short_name
);
1174 * in strict mode, all (except the matched one) rules
1175 * must fail to resolve to a valid non-ambiguous ref
1178 rules_to_fail
= nr_rules
;
1181 * check if the short name resolves to a valid ref,
1182 * but use only rules prior to the matched one
1184 for (j
= 0; j
< rules_to_fail
; j
++) {
1185 const char *rule
= ref_rev_parse_rules
[j
];
1187 /* skip matched rule */
1192 * the short name is ambiguous, if it resolves
1193 * (with this previous rule) to a valid ref
1194 * read_ref() returns 0 on success
1196 strbuf_reset(&resolved_buf
);
1197 strbuf_addf(&resolved_buf
, rule
,
1198 short_name_len
, short_name
);
1199 if (ref_exists(resolved_buf
.buf
))
1204 * short name is non-ambiguous if all previous rules
1205 * haven't resolved to a valid ref
1207 if (j
== rules_to_fail
) {
1208 strbuf_release(&resolved_buf
);
1213 strbuf_release(&resolved_buf
);
1215 return xstrdup(refname
);
1218 static struct string_list
*hide_refs
;
1220 int parse_hide_refs_config(const char *var
, const char *value
, const char *section
)
1223 if (!strcmp("transfer.hiderefs", var
) ||
1224 (!parse_config_key(var
, section
, NULL
, NULL
, &key
) &&
1225 !strcmp(key
, "hiderefs"))) {
1230 return config_error_nonbool(var
);
1231 ref
= xstrdup(value
);
1233 while (len
&& ref
[len
- 1] == '/')
1236 hide_refs
= xcalloc(1, sizeof(*hide_refs
));
1237 hide_refs
->strdup_strings
= 1;
1239 string_list_append(hide_refs
, ref
);
1244 int ref_is_hidden(const char *refname
, const char *refname_full
)
1250 for (i
= hide_refs
->nr
- 1; i
>= 0; i
--) {
1251 const char *match
= hide_refs
->items
[i
].string
;
1252 const char *subject
;
1256 if (*match
== '!') {
1261 if (*match
== '^') {
1262 subject
= refname_full
;
1268 /* refname can be NULL when namespaces are used. */
1270 skip_prefix(subject
, match
, &p
) &&
1277 const char *find_descendant_ref(const char *dirname
,
1278 const struct string_list
*extras
,
1279 const struct string_list
*skip
)
1287 * Look at the place where dirname would be inserted into
1288 * extras. If there is an entry at that position that starts
1289 * with dirname (remember, dirname includes the trailing
1290 * slash) and is not in skip, then we have a conflict.
1292 for (pos
= string_list_find_insert_index(extras
, dirname
, 0);
1293 pos
< extras
->nr
; pos
++) {
1294 const char *extra_refname
= extras
->items
[pos
].string
;
1296 if (!starts_with(extra_refname
, dirname
))
1299 if (!skip
|| !string_list_has_string(skip
, extra_refname
))
1300 return extra_refname
;
1305 int refs_rename_ref_available(struct ref_store
*refs
,
1306 const char *old_refname
,
1307 const char *new_refname
)
1309 struct string_list skip
= STRING_LIST_INIT_NODUP
;
1310 struct strbuf err
= STRBUF_INIT
;
1313 string_list_insert(&skip
, old_refname
);
1314 ok
= !refs_verify_refname_available(refs
, new_refname
,
1317 error("%s", err
.buf
);
1319 string_list_clear(&skip
, 0);
1320 strbuf_release(&err
);
1324 int refs_head_ref(struct ref_store
*refs
, each_ref_fn fn
, void *cb_data
)
1326 struct object_id oid
;
1329 if (!refs_read_ref_full(refs
, "HEAD", RESOLVE_REF_READING
,
1331 return fn("HEAD", &oid
, flag
, cb_data
);
1336 int head_ref(each_ref_fn fn
, void *cb_data
)
1338 return refs_head_ref(get_main_ref_store(the_repository
), fn
, cb_data
);
1341 struct ref_iterator
*refs_ref_iterator_begin(
1342 struct ref_store
*refs
,
1343 const char *prefix
, int trim
, int flags
)
1345 struct ref_iterator
*iter
;
1347 if (ref_paranoia
< 0)
1348 ref_paranoia
= git_env_bool("GIT_REF_PARANOIA", 0);
1350 flags
|= DO_FOR_EACH_INCLUDE_BROKEN
;
1352 iter
= refs
->be
->iterator_begin(refs
, prefix
, flags
);
1355 * `iterator_begin()` already takes care of prefix, but we
1356 * might need to do some trimming:
1359 iter
= prefix_ref_iterator_begin(iter
, "", trim
);
1361 /* Sanity check for subclasses: */
1363 BUG("reference iterator is not ordered");
1369 * Call fn for each reference in the specified submodule for which the
1370 * refname begins with prefix. If trim is non-zero, then trim that
1371 * many characters off the beginning of each refname before passing
1372 * the refname to fn. flags can be DO_FOR_EACH_INCLUDE_BROKEN to
1373 * include broken references in the iteration. If fn ever returns a
1374 * non-zero value, stop the iteration and return that value;
1375 * otherwise, return 0.
1377 static int do_for_each_ref(struct ref_store
*refs
, const char *prefix
,
1378 each_ref_fn fn
, int trim
, int flags
, void *cb_data
)
1380 struct ref_iterator
*iter
;
1385 iter
= refs_ref_iterator_begin(refs
, prefix
, trim
, flags
);
1387 return do_for_each_ref_iterator(iter
, fn
, cb_data
);
1390 int refs_for_each_ref(struct ref_store
*refs
, each_ref_fn fn
, void *cb_data
)
1392 return do_for_each_ref(refs
, "", fn
, 0, 0, cb_data
);
1395 int for_each_ref(each_ref_fn fn
, void *cb_data
)
1397 return refs_for_each_ref(get_main_ref_store(the_repository
), fn
, cb_data
);
1400 int refs_for_each_ref_in(struct ref_store
*refs
, const char *prefix
,
1401 each_ref_fn fn
, void *cb_data
)
1403 return do_for_each_ref(refs
, prefix
, fn
, strlen(prefix
), 0, cb_data
);
1406 int for_each_ref_in(const char *prefix
, each_ref_fn fn
, void *cb_data
)
1408 return refs_for_each_ref_in(get_main_ref_store(the_repository
), prefix
, fn
, cb_data
);
1411 int for_each_fullref_in(const char *prefix
, each_ref_fn fn
, void *cb_data
, unsigned int broken
)
1413 unsigned int flag
= 0;
1416 flag
= DO_FOR_EACH_INCLUDE_BROKEN
;
1417 return do_for_each_ref(get_main_ref_store(the_repository
),
1418 prefix
, fn
, 0, flag
, cb_data
);
1421 int refs_for_each_fullref_in(struct ref_store
*refs
, const char *prefix
,
1422 each_ref_fn fn
, void *cb_data
,
1423 unsigned int broken
)
1425 unsigned int flag
= 0;
1428 flag
= DO_FOR_EACH_INCLUDE_BROKEN
;
1429 return do_for_each_ref(refs
, prefix
, fn
, 0, flag
, cb_data
);
1432 int for_each_replace_ref(struct repository
*r
, each_ref_fn fn
, void *cb_data
)
1434 return do_for_each_ref(get_main_ref_store(r
),
1435 git_replace_ref_base
, fn
,
1436 strlen(git_replace_ref_base
),
1437 DO_FOR_EACH_INCLUDE_BROKEN
, cb_data
);
1440 int for_each_namespaced_ref(each_ref_fn fn
, void *cb_data
)
1442 struct strbuf buf
= STRBUF_INIT
;
1444 strbuf_addf(&buf
, "%srefs/", get_git_namespace());
1445 ret
= do_for_each_ref(get_main_ref_store(the_repository
),
1446 buf
.buf
, fn
, 0, 0, cb_data
);
1447 strbuf_release(&buf
);
1451 int refs_for_each_rawref(struct ref_store
*refs
, each_ref_fn fn
, void *cb_data
)
1453 return do_for_each_ref(refs
, "", fn
, 0,
1454 DO_FOR_EACH_INCLUDE_BROKEN
, cb_data
);
1457 int for_each_rawref(each_ref_fn fn
, void *cb_data
)
1459 return refs_for_each_rawref(get_main_ref_store(the_repository
), fn
, cb_data
);
1462 int refs_read_raw_ref(struct ref_store
*ref_store
,
1463 const char *refname
, struct object_id
*oid
,
1464 struct strbuf
*referent
, unsigned int *type
)
1466 return ref_store
->be
->read_raw_ref(ref_store
, refname
, oid
, referent
, type
);
1469 /* This function needs to return a meaningful errno on failure */
1470 const char *refs_resolve_ref_unsafe(struct ref_store
*refs
,
1471 const char *refname
,
1473 struct object_id
*oid
, int *flags
)
1475 static struct strbuf sb_refname
= STRBUF_INIT
;
1476 struct object_id unused_oid
;
1483 flags
= &unused_flags
;
1487 if (check_refname_format(refname
, REFNAME_ALLOW_ONELEVEL
)) {
1488 if (!(resolve_flags
& RESOLVE_REF_ALLOW_BAD_NAME
) ||
1489 !refname_is_safe(refname
)) {
1495 * dwim_ref() uses REF_ISBROKEN to distinguish between
1496 * missing refs and refs that were present but invalid,
1497 * to complain about the latter to stderr.
1499 * We don't know whether the ref exists, so don't set
1502 *flags
|= REF_BAD_NAME
;
1505 for (symref_count
= 0; symref_count
< SYMREF_MAXDEPTH
; symref_count
++) {
1506 unsigned int read_flags
= 0;
1508 if (refs_read_raw_ref(refs
, refname
,
1509 oid
, &sb_refname
, &read_flags
)) {
1510 *flags
|= read_flags
;
1512 /* In reading mode, refs must eventually resolve */
1513 if (resolve_flags
& RESOLVE_REF_READING
)
1517 * Otherwise a missing ref is OK. But the files backend
1518 * may show errors besides ENOENT if there are
1519 * similarly-named refs.
1521 if (errno
!= ENOENT
&&
1527 if (*flags
& REF_BAD_NAME
)
1528 *flags
|= REF_ISBROKEN
;
1532 *flags
|= read_flags
;
1534 if (!(read_flags
& REF_ISSYMREF
)) {
1535 if (*flags
& REF_BAD_NAME
) {
1537 *flags
|= REF_ISBROKEN
;
1542 refname
= sb_refname
.buf
;
1543 if (resolve_flags
& RESOLVE_REF_NO_RECURSE
) {
1547 if (check_refname_format(refname
, REFNAME_ALLOW_ONELEVEL
)) {
1548 if (!(resolve_flags
& RESOLVE_REF_ALLOW_BAD_NAME
) ||
1549 !refname_is_safe(refname
)) {
1554 *flags
|= REF_ISBROKEN
| REF_BAD_NAME
;
1562 /* backend functions */
1563 int refs_init_db(struct strbuf
*err
)
1565 struct ref_store
*refs
= get_main_ref_store(the_repository
);
1567 return refs
->be
->init_db(refs
, err
);
1570 const char *resolve_ref_unsafe(const char *refname
, int resolve_flags
,
1571 struct object_id
*oid
, int *flags
)
1573 return refs_resolve_ref_unsafe(get_main_ref_store(the_repository
), refname
,
1574 resolve_flags
, oid
, flags
);
1577 int resolve_gitlink_ref(const char *submodule
, const char *refname
,
1578 struct object_id
*oid
)
1580 struct ref_store
*refs
;
1583 refs
= get_submodule_ref_store(submodule
);
1588 if (!refs_resolve_ref_unsafe(refs
, refname
, 0, oid
, &flags
) ||
1594 struct ref_store_hash_entry
1596 struct hashmap_entry ent
; /* must be the first member! */
1598 struct ref_store
*refs
;
1600 /* NUL-terminated identifier of the ref store: */
1601 char name
[FLEX_ARRAY
];
1604 static int ref_store_hash_cmp(const void *unused_cmp_data
,
1605 const void *entry
, const void *entry_or_key
,
1606 const void *keydata
)
1608 const struct ref_store_hash_entry
*e1
= entry
, *e2
= entry_or_key
;
1609 const char *name
= keydata
? keydata
: e2
->name
;
1611 return strcmp(e1
->name
, name
);
1614 static struct ref_store_hash_entry
*alloc_ref_store_hash_entry(
1615 const char *name
, struct ref_store
*refs
)
1617 struct ref_store_hash_entry
*entry
;
1619 FLEX_ALLOC_STR(entry
, name
, name
);
1620 hashmap_entry_init(entry
, strhash(name
));
1625 /* A hashmap of ref_stores, stored by submodule name: */
1626 static struct hashmap submodule_ref_stores
;
1628 /* A hashmap of ref_stores, stored by worktree id: */
1629 static struct hashmap worktree_ref_stores
;
1632 * Look up a ref store by name. If that ref_store hasn't been
1633 * registered yet, return NULL.
1635 static struct ref_store
*lookup_ref_store_map(struct hashmap
*map
,
1638 struct ref_store_hash_entry
*entry
;
1640 if (!map
->tablesize
)
1641 /* It's initialized on demand in register_ref_store(). */
1644 entry
= hashmap_get_from_hash(map
, strhash(name
), name
);
1645 return entry
? entry
->refs
: NULL
;
1649 * Create, record, and return a ref_store instance for the specified
1652 static struct ref_store
*ref_store_init(const char *gitdir
,
1655 const char *be_name
= "files";
1656 struct ref_storage_be
*be
= find_ref_storage_backend(be_name
);
1657 struct ref_store
*refs
;
1660 die("BUG: reference backend %s is unknown", be_name
);
1662 refs
= be
->init(gitdir
, flags
);
1666 struct ref_store
*get_main_ref_store(struct repository
*r
)
1672 BUG("attempting to get main_ref_store outside of repository");
1674 r
->refs
= ref_store_init(r
->gitdir
, REF_STORE_ALL_CAPS
);
1679 * Associate a ref store with a name. It is a fatal error to call this
1680 * function twice for the same name.
1682 static void register_ref_store_map(struct hashmap
*map
,
1684 struct ref_store
*refs
,
1687 if (!map
->tablesize
)
1688 hashmap_init(map
, ref_store_hash_cmp
, NULL
, 0);
1690 if (hashmap_put(map
, alloc_ref_store_hash_entry(name
, refs
)))
1691 die("BUG: %s ref_store '%s' initialized twice", type
, name
);
1694 struct ref_store
*get_submodule_ref_store(const char *submodule
)
1696 struct strbuf submodule_sb
= STRBUF_INIT
;
1697 struct ref_store
*refs
;
1698 char *to_free
= NULL
;
1704 len
= strlen(submodule
);
1705 while (len
&& is_dir_sep(submodule
[len
- 1]))
1711 /* We need to strip off one or more trailing slashes */
1712 submodule
= to_free
= xmemdupz(submodule
, len
);
1714 refs
= lookup_ref_store_map(&submodule_ref_stores
, submodule
);
1718 strbuf_addstr(&submodule_sb
, submodule
);
1719 if (!is_nonbare_repository_dir(&submodule_sb
))
1722 if (submodule_to_gitdir(&submodule_sb
, submodule
))
1725 /* assume that add_submodule_odb() has been called */
1726 refs
= ref_store_init(submodule_sb
.buf
,
1727 REF_STORE_READ
| REF_STORE_ODB
);
1728 register_ref_store_map(&submodule_ref_stores
, "submodule",
1732 strbuf_release(&submodule_sb
);
1738 struct ref_store
*get_worktree_ref_store(const struct worktree
*wt
)
1740 struct ref_store
*refs
;
1744 return get_main_ref_store(the_repository
);
1746 id
= wt
->id
? wt
->id
: "/";
1747 refs
= lookup_ref_store_map(&worktree_ref_stores
, id
);
1752 refs
= ref_store_init(git_common_path("worktrees/%s", wt
->id
),
1753 REF_STORE_ALL_CAPS
);
1755 refs
= ref_store_init(get_git_common_dir(),
1756 REF_STORE_ALL_CAPS
);
1759 register_ref_store_map(&worktree_ref_stores
, "worktree",
1764 void base_ref_store_init(struct ref_store
*refs
,
1765 const struct ref_storage_be
*be
)
1770 /* backend functions */
1771 int refs_pack_refs(struct ref_store
*refs
, unsigned int flags
)
1773 return refs
->be
->pack_refs(refs
, flags
);
1776 int refs_peel_ref(struct ref_store
*refs
, const char *refname
,
1777 struct object_id
*oid
)
1780 struct object_id base
;
1782 if (current_ref_iter
&& current_ref_iter
->refname
== refname
) {
1783 struct object_id peeled
;
1785 if (ref_iterator_peel(current_ref_iter
, &peeled
))
1787 oidcpy(oid
, &peeled
);
1791 if (refs_read_ref_full(refs
, refname
,
1792 RESOLVE_REF_READING
, &base
, &flag
))
1795 return peel_object(&base
, oid
);
1798 int peel_ref(const char *refname
, struct object_id
*oid
)
1800 return refs_peel_ref(get_main_ref_store(the_repository
), refname
, oid
);
1803 int refs_create_symref(struct ref_store
*refs
,
1804 const char *ref_target
,
1805 const char *refs_heads_master
,
1808 return refs
->be
->create_symref(refs
, ref_target
,
1813 int create_symref(const char *ref_target
, const char *refs_heads_master
,
1816 return refs_create_symref(get_main_ref_store(the_repository
), ref_target
,
1817 refs_heads_master
, logmsg
);
1820 int ref_update_reject_duplicates(struct string_list
*refnames
,
1823 size_t i
, n
= refnames
->nr
;
1827 for (i
= 1; i
< n
; i
++) {
1828 int cmp
= strcmp(refnames
->items
[i
- 1].string
,
1829 refnames
->items
[i
].string
);
1833 "multiple updates for ref '%s' not allowed.",
1834 refnames
->items
[i
].string
);
1836 } else if (cmp
> 0) {
1837 die("BUG: ref_update_reject_duplicates() received unsorted list");
1843 int ref_transaction_prepare(struct ref_transaction
*transaction
,
1846 struct ref_store
*refs
= transaction
->ref_store
;
1848 switch (transaction
->state
) {
1849 case REF_TRANSACTION_OPEN
:
1852 case REF_TRANSACTION_PREPARED
:
1853 die("BUG: prepare called twice on reference transaction");
1855 case REF_TRANSACTION_CLOSED
:
1856 die("BUG: prepare called on a closed reference transaction");
1859 die("BUG: unexpected reference transaction state");
1863 if (getenv(GIT_QUARANTINE_ENVIRONMENT
)) {
1865 _("ref updates forbidden inside quarantine environment"));
1869 return refs
->be
->transaction_prepare(refs
, transaction
, err
);
1872 int ref_transaction_abort(struct ref_transaction
*transaction
,
1875 struct ref_store
*refs
= transaction
->ref_store
;
1878 switch (transaction
->state
) {
1879 case REF_TRANSACTION_OPEN
:
1880 /* No need to abort explicitly. */
1882 case REF_TRANSACTION_PREPARED
:
1883 ret
= refs
->be
->transaction_abort(refs
, transaction
, err
);
1885 case REF_TRANSACTION_CLOSED
:
1886 die("BUG: abort called on a closed reference transaction");
1889 die("BUG: unexpected reference transaction state");
1893 ref_transaction_free(transaction
);
1897 int ref_transaction_commit(struct ref_transaction
*transaction
,
1900 struct ref_store
*refs
= transaction
->ref_store
;
1903 switch (transaction
->state
) {
1904 case REF_TRANSACTION_OPEN
:
1905 /* Need to prepare first. */
1906 ret
= ref_transaction_prepare(transaction
, err
);
1910 case REF_TRANSACTION_PREPARED
:
1911 /* Fall through to finish. */
1913 case REF_TRANSACTION_CLOSED
:
1914 die("BUG: commit called on a closed reference transaction");
1917 die("BUG: unexpected reference transaction state");
1921 return refs
->be
->transaction_finish(refs
, transaction
, err
);
1924 int refs_verify_refname_available(struct ref_store
*refs
,
1925 const char *refname
,
1926 const struct string_list
*extras
,
1927 const struct string_list
*skip
,
1931 const char *extra_refname
;
1932 struct strbuf dirname
= STRBUF_INIT
;
1933 struct strbuf referent
= STRBUF_INIT
;
1934 struct object_id oid
;
1936 struct ref_iterator
*iter
;
1941 * For the sake of comments in this function, suppose that
1942 * refname is "refs/foo/bar".
1947 strbuf_grow(&dirname
, strlen(refname
) + 1);
1948 for (slash
= strchr(refname
, '/'); slash
; slash
= strchr(slash
+ 1, '/')) {
1949 /* Expand dirname to the new prefix, not including the trailing slash: */
1950 strbuf_add(&dirname
, refname
+ dirname
.len
, slash
- refname
- dirname
.len
);
1953 * We are still at a leading dir of the refname (e.g.,
1954 * "refs/foo"; if there is a reference with that name,
1955 * it is a conflict, *unless* it is in skip.
1957 if (skip
&& string_list_has_string(skip
, dirname
.buf
))
1960 if (!refs_read_raw_ref(refs
, dirname
.buf
, &oid
, &referent
, &type
)) {
1961 strbuf_addf(err
, "'%s' exists; cannot create '%s'",
1962 dirname
.buf
, refname
);
1966 if (extras
&& string_list_has_string(extras
, dirname
.buf
)) {
1967 strbuf_addf(err
, "cannot process '%s' and '%s' at the same time",
1968 refname
, dirname
.buf
);
1974 * We are at the leaf of our refname (e.g., "refs/foo/bar").
1975 * There is no point in searching for a reference with that
1976 * name, because a refname isn't considered to conflict with
1977 * itself. But we still need to check for references whose
1978 * names are in the "refs/foo/bar/" namespace, because they
1981 strbuf_addstr(&dirname
, refname
+ dirname
.len
);
1982 strbuf_addch(&dirname
, '/');
1984 iter
= refs_ref_iterator_begin(refs
, dirname
.buf
, 0,
1985 DO_FOR_EACH_INCLUDE_BROKEN
);
1986 while ((ok
= ref_iterator_advance(iter
)) == ITER_OK
) {
1988 string_list_has_string(skip
, iter
->refname
))
1991 strbuf_addf(err
, "'%s' exists; cannot create '%s'",
1992 iter
->refname
, refname
);
1993 ref_iterator_abort(iter
);
1997 if (ok
!= ITER_DONE
)
1998 die("BUG: error while iterating over references");
2000 extra_refname
= find_descendant_ref(dirname
.buf
, extras
, skip
);
2002 strbuf_addf(err
, "cannot process '%s' and '%s' at the same time",
2003 refname
, extra_refname
);
2008 strbuf_release(&referent
);
2009 strbuf_release(&dirname
);
2013 int refs_for_each_reflog(struct ref_store
*refs
, each_ref_fn fn
, void *cb_data
)
2015 struct ref_iterator
*iter
;
2017 iter
= refs
->be
->reflog_iterator_begin(refs
);
2019 return do_for_each_ref_iterator(iter
, fn
, cb_data
);
2022 int for_each_reflog(each_ref_fn fn
, void *cb_data
)
2024 return refs_for_each_reflog(get_main_ref_store(the_repository
), fn
, cb_data
);
2027 int refs_for_each_reflog_ent_reverse(struct ref_store
*refs
,
2028 const char *refname
,
2029 each_reflog_ent_fn fn
,
2032 return refs
->be
->for_each_reflog_ent_reverse(refs
, refname
,
2036 int for_each_reflog_ent_reverse(const char *refname
, each_reflog_ent_fn fn
,
2039 return refs_for_each_reflog_ent_reverse(get_main_ref_store(the_repository
),
2040 refname
, fn
, cb_data
);
2043 int refs_for_each_reflog_ent(struct ref_store
*refs
, const char *refname
,
2044 each_reflog_ent_fn fn
, void *cb_data
)
2046 return refs
->be
->for_each_reflog_ent(refs
, refname
, fn
, cb_data
);
2049 int for_each_reflog_ent(const char *refname
, each_reflog_ent_fn fn
,
2052 return refs_for_each_reflog_ent(get_main_ref_store(the_repository
), refname
,
2056 int refs_reflog_exists(struct ref_store
*refs
, const char *refname
)
2058 return refs
->be
->reflog_exists(refs
, refname
);
2061 int reflog_exists(const char *refname
)
2063 return refs_reflog_exists(get_main_ref_store(the_repository
), refname
);
2066 int refs_create_reflog(struct ref_store
*refs
, const char *refname
,
2067 int force_create
, struct strbuf
*err
)
2069 return refs
->be
->create_reflog(refs
, refname
, force_create
, err
);
2072 int safe_create_reflog(const char *refname
, int force_create
,
2075 return refs_create_reflog(get_main_ref_store(the_repository
), refname
,
2079 int refs_delete_reflog(struct ref_store
*refs
, const char *refname
)
2081 return refs
->be
->delete_reflog(refs
, refname
);
2084 int delete_reflog(const char *refname
)
2086 return refs_delete_reflog(get_main_ref_store(the_repository
), refname
);
2089 int refs_reflog_expire(struct ref_store
*refs
,
2090 const char *refname
, const struct object_id
*oid
,
2092 reflog_expiry_prepare_fn prepare_fn
,
2093 reflog_expiry_should_prune_fn should_prune_fn
,
2094 reflog_expiry_cleanup_fn cleanup_fn
,
2095 void *policy_cb_data
)
2097 return refs
->be
->reflog_expire(refs
, refname
, oid
, flags
,
2098 prepare_fn
, should_prune_fn
,
2099 cleanup_fn
, policy_cb_data
);
2102 int reflog_expire(const char *refname
, const struct object_id
*oid
,
2104 reflog_expiry_prepare_fn prepare_fn
,
2105 reflog_expiry_should_prune_fn should_prune_fn
,
2106 reflog_expiry_cleanup_fn cleanup_fn
,
2107 void *policy_cb_data
)
2109 return refs_reflog_expire(get_main_ref_store(the_repository
),
2110 refname
, oid
, flags
,
2111 prepare_fn
, should_prune_fn
,
2112 cleanup_fn
, policy_cb_data
);
2115 int initial_ref_transaction_commit(struct ref_transaction
*transaction
,
2118 struct ref_store
*refs
= transaction
->ref_store
;
2120 return refs
->be
->initial_transaction_commit(refs
, transaction
, err
);
2123 int refs_delete_refs(struct ref_store
*refs
, const char *msg
,
2124 struct string_list
*refnames
, unsigned int flags
)
2126 return refs
->be
->delete_refs(refs
, msg
, refnames
, flags
);
2129 int delete_refs(const char *msg
, struct string_list
*refnames
,
2132 return refs_delete_refs(get_main_ref_store(the_repository
), msg
, refnames
, flags
);
2135 int refs_rename_ref(struct ref_store
*refs
, const char *oldref
,
2136 const char *newref
, const char *logmsg
)
2138 return refs
->be
->rename_ref(refs
, oldref
, newref
, logmsg
);
2141 int rename_ref(const char *oldref
, const char *newref
, const char *logmsg
)
2143 return refs_rename_ref(get_main_ref_store(the_repository
), oldref
, newref
, logmsg
);
2146 int refs_copy_existing_ref(struct ref_store
*refs
, const char *oldref
,
2147 const char *newref
, const char *logmsg
)
2149 return refs
->be
->copy_ref(refs
, oldref
, newref
, logmsg
);
2152 int copy_existing_ref(const char *oldref
, const char *newref
, const char *logmsg
)
2154 return refs_copy_existing_ref(get_main_ref_store(the_repository
), oldref
, newref
, logmsg
);