7 /* ISSYMREF=01 and ISPACKED=02 are public interfaces */
8 #define REF_KNOWS_PEELED 04
12 struct ref_list
*next
;
13 unsigned char flag
; /* ISSYMREF? ISPACKED? */
14 unsigned char sha1
[20];
15 unsigned char peeled
[20];
16 char name
[FLEX_ARRAY
];
19 static const char *parse_ref_line(char *line
, unsigned char *sha1
)
22 * 42: the answer to everything.
24 * In this case, it happens to be the answer to
25 * 40 (length of sha1 hex representation)
26 * +1 (space in between hex and name)
27 * +1 (newline at the end of the line)
29 int len
= strlen(line
) - 42;
33 if (get_sha1_hex(line
, sha1
) < 0)
35 if (!isspace(line
[40]))
40 if (line
[len
] != '\n')
47 static struct ref_list
*add_ref(const char *name
, const unsigned char *sha1
,
48 int flag
, struct ref_list
*list
,
49 struct ref_list
**new_entry
)
52 struct ref_list
*entry
;
54 /* Allocate it and add it in.. */
55 len
= strlen(name
) + 1;
56 entry
= xmalloc(sizeof(struct ref_list
) + len
);
57 hashcpy(entry
->sha1
, sha1
);
58 hashclr(entry
->peeled
);
59 if (check_refname_format(name
, REFNAME_ALLOW_ONELEVEL
|REFNAME_DOT_COMPONENT
))
60 die("Reference has invalid format: '%s'", name
);
61 memcpy(entry
->name
, name
, len
);
69 /* merge sort the ref list */
70 static struct ref_list
*sort_ref_list(struct ref_list
*list
)
72 int psize
, qsize
, last_merge_count
, cmp
;
73 struct ref_list
*p
, *q
, *l
, *e
;
74 struct ref_list
*new_list
= list
;
82 last_merge_count
= merge_count
;
95 while (psize
< k
&& q
->next
) {
101 while ((psize
> 0) || (qsize
> 0 && q
)) {
102 if (qsize
== 0 || !q
) {
106 } else if (psize
== 0) {
111 cmp
= strcmp(q
->name
, p
->name
);
116 } else if (cmp
> 0) {
121 if (hashcmp(q
->sha1
, p
->sha1
))
122 die("Duplicated ref, and SHA1s don't match: %s",
124 warning("Duplicated ref: %s", q
->name
);
148 } while ((last_merge_count
!= merge_count
) || (last_merge_count
!= 1));
154 * Future: need to be in "struct repository"
155 * when doing a full libification.
157 static struct cached_refs
{
158 struct cached_refs
*next
;
161 struct ref_list
*loose
;
162 struct ref_list
*packed
;
163 /* The submodule name, or "" for the main repo. */
164 char name
[FLEX_ARRAY
];
167 static struct ref_list
*current_ref
;
169 static struct ref_list
*extra_refs
;
171 static void free_ref_list(struct ref_list
*list
)
173 struct ref_list
*next
;
174 for ( ; list
; list
= next
) {
180 static void clear_cached_refs(struct cached_refs
*ca
)
182 if (ca
->did_loose
&& ca
->loose
)
183 free_ref_list(ca
->loose
);
184 if (ca
->did_packed
&& ca
->packed
)
185 free_ref_list(ca
->packed
);
186 ca
->loose
= ca
->packed
= NULL
;
187 ca
->did_loose
= ca
->did_packed
= 0;
190 static struct cached_refs
*create_cached_refs(const char *submodule
)
193 struct cached_refs
*refs
;
196 len
= strlen(submodule
) + 1;
197 refs
= xmalloc(sizeof(struct cached_refs
) + len
);
199 refs
->did_loose
= refs
->did_packed
= 0;
200 refs
->loose
= refs
->packed
= NULL
;
201 memcpy(refs
->name
, submodule
, len
);
206 * Return a pointer to a cached_refs for the specified submodule. For
207 * the main repository, use submodule==NULL. The returned structure
208 * will be allocated and initialized but not necessarily populated; it
209 * should not be freed.
211 static struct cached_refs
*get_cached_refs(const char *submodule
)
213 struct cached_refs
*refs
= cached_refs
;
217 if (!strcmp(submodule
, refs
->name
))
222 refs
= create_cached_refs(submodule
);
223 refs
->next
= cached_refs
;
228 static void invalidate_cached_refs(void)
230 struct cached_refs
*refs
= cached_refs
;
232 clear_cached_refs(refs
);
237 static struct ref_list
*read_packed_refs(FILE *f
)
239 struct ref_list
*list
= NULL
;
240 struct ref_list
*last
= NULL
;
241 char refline
[PATH_MAX
];
242 int flag
= REF_ISPACKED
;
244 while (fgets(refline
, sizeof(refline
), f
)) {
245 unsigned char sha1
[20];
247 static const char header
[] = "# pack-refs with:";
249 if (!strncmp(refline
, header
, sizeof(header
)-1)) {
250 const char *traits
= refline
+ sizeof(header
) - 1;
251 if (strstr(traits
, " peeled "))
252 flag
|= REF_KNOWS_PEELED
;
253 /* perhaps other traits later as well */
257 name
= parse_ref_line(refline
, sha1
);
259 list
= add_ref(name
, sha1
, flag
, list
, &last
);
264 strlen(refline
) == 42 &&
265 refline
[41] == '\n' &&
266 !get_sha1_hex(refline
+ 1, sha1
))
267 hashcpy(last
->peeled
, sha1
);
269 return sort_ref_list(list
);
272 void add_extra_ref(const char *name
, const unsigned char *sha1
, int flag
)
274 extra_refs
= add_ref(name
, sha1
, flag
, extra_refs
, NULL
);
277 void clear_extra_refs(void)
279 free_ref_list(extra_refs
);
283 static struct ref_list
*get_packed_refs(const char *submodule
)
285 struct cached_refs
*refs
= get_cached_refs(submodule
);
287 if (!refs
->did_packed
) {
288 const char *packed_refs_file
;
292 packed_refs_file
= git_path_submodule(submodule
, "packed-refs");
294 packed_refs_file
= git_path("packed-refs");
295 f
= fopen(packed_refs_file
, "r");
298 refs
->packed
= read_packed_refs(f
);
301 refs
->did_packed
= 1;
306 static struct ref_list
*get_ref_dir(const char *submodule
, const char *base
,
307 struct ref_list
*list
)
313 path
= git_path_submodule(submodule
, "%s", base
);
315 path
= git_path("%s", base
);
322 int baselen
= strlen(base
);
323 char *ref
= xmalloc(baselen
+ 257);
325 memcpy(ref
, base
, baselen
);
326 if (baselen
&& base
[baselen
-1] != '/')
327 ref
[baselen
++] = '/';
329 while ((de
= readdir(dir
)) != NULL
) {
330 unsigned char sha1
[20];
336 if (de
->d_name
[0] == '.')
338 namelen
= strlen(de
->d_name
);
341 if (has_extension(de
->d_name
, ".lock"))
343 memcpy(ref
+ baselen
, de
->d_name
, namelen
+1);
345 ? git_path_submodule(submodule
, "%s", ref
)
346 : git_path("%s", ref
);
347 if (stat(refdir
, &st
) < 0)
349 if (S_ISDIR(st
.st_mode
)) {
350 list
= get_ref_dir(submodule
, ref
, list
);
356 if (resolve_gitlink_ref(submodule
, ref
, sha1
) < 0) {
361 if (!resolve_ref(ref
, sha1
, 1, &flag
)) {
365 list
= add_ref(ref
, sha1
, flag
, list
, NULL
);
370 return sort_ref_list(list
);
373 struct warn_if_dangling_data
{
379 static int warn_if_dangling_symref(const char *refname
, const unsigned char *sha1
,
380 int flags
, void *cb_data
)
382 struct warn_if_dangling_data
*d
= cb_data
;
383 const char *resolves_to
;
384 unsigned char junk
[20];
386 if (!(flags
& REF_ISSYMREF
))
389 resolves_to
= resolve_ref(refname
, junk
, 0, NULL
);
390 if (!resolves_to
|| strcmp(resolves_to
, d
->refname
))
393 fprintf(d
->fp
, d
->msg_fmt
, refname
);
397 void warn_dangling_symref(FILE *fp
, const char *msg_fmt
, const char *refname
)
399 struct warn_if_dangling_data data
;
402 data
.refname
= refname
;
403 data
.msg_fmt
= msg_fmt
;
404 for_each_rawref(warn_if_dangling_symref
, &data
);
407 static struct ref_list
*get_loose_refs(const char *submodule
)
409 struct cached_refs
*refs
= get_cached_refs(submodule
);
411 if (!refs
->did_loose
) {
412 refs
->loose
= get_ref_dir(submodule
, "refs", NULL
);
418 /* We allow "recursive" symbolic refs. Only within reason, though */
420 #define MAXREFLEN (1024)
422 static int resolve_gitlink_packed_ref(char *name
, int pathlen
, const char *refname
, unsigned char *result
)
425 struct ref_list
*packed_refs
;
426 struct ref_list
*ref
;
429 strcpy(name
+ pathlen
, "packed-refs");
430 f
= fopen(name
, "r");
433 packed_refs
= read_packed_refs(f
);
438 if (!strcmp(ref
->name
, refname
)) {
440 memcpy(result
, ref
->sha1
, 20);
445 free_ref_list(packed_refs
);
449 static int resolve_gitlink_ref_recursive(char *name
, int pathlen
, const char *refname
, unsigned char *result
, int recursion
)
451 int fd
, len
= strlen(refname
);
452 char buffer
[128], *p
;
454 if (recursion
> MAXDEPTH
|| len
> MAXREFLEN
)
456 memcpy(name
+ pathlen
, refname
, len
+1);
457 fd
= open(name
, O_RDONLY
);
459 return resolve_gitlink_packed_ref(name
, pathlen
, refname
, result
);
461 len
= read(fd
, buffer
, sizeof(buffer
)-1);
465 while (len
&& isspace(buffer
[len
-1]))
469 /* Was it a detached head or an old-fashioned symlink? */
470 if (!get_sha1_hex(buffer
, result
))
474 if (strncmp(buffer
, "ref:", 4))
480 return resolve_gitlink_ref_recursive(name
, pathlen
, p
, result
, recursion
+1);
483 int resolve_gitlink_ref(const char *path
, const char *refname
, unsigned char *result
)
485 int len
= strlen(path
), retval
;
489 while (len
&& path
[len
-1] == '/')
493 gitdir
= xmalloc(len
+ MAXREFLEN
+ 8);
494 memcpy(gitdir
, path
, len
);
495 memcpy(gitdir
+ len
, "/.git", 6);
498 tmp
= read_gitfile(gitdir
);
502 gitdir
= xmalloc(len
+ MAXREFLEN
+ 3);
503 memcpy(gitdir
, tmp
, len
);
506 gitdir
[++len
] = '\0';
507 retval
= resolve_gitlink_ref_recursive(gitdir
, len
, refname
, result
, 0);
513 * Try to read ref from the packed references. On success, set sha1
514 * and return 0; otherwise, return -1.
516 static int get_packed_ref(const char *ref
, unsigned char *sha1
)
518 struct ref_list
*list
= get_packed_refs(NULL
);
520 if (!strcmp(ref
, list
->name
)) {
521 hashcpy(sha1
, list
->sha1
);
529 const char *resolve_ref(const char *ref
, unsigned char *sha1
, int reading
, int *flag
)
531 int depth
= MAXDEPTH
;
534 static char ref_buffer
[256];
540 if (check_refname_format(ref
, REFNAME_ALLOW_ONELEVEL
))
551 git_snpath(path
, sizeof(path
), "%s", ref
);
553 if (lstat(path
, &st
) < 0) {
557 * The loose reference file does not exist;
558 * check for a packed reference.
560 if (!get_packed_ref(ref
, sha1
)) {
562 *flag
|= REF_ISPACKED
;
565 /* The reference is not a packed reference, either. */
574 /* Follow "normalized" - ie "refs/.." symlinks by hand */
575 if (S_ISLNK(st
.st_mode
)) {
576 len
= readlink(path
, buffer
, sizeof(buffer
)-1);
580 if (!prefixcmp(buffer
, "refs/") &&
581 !check_refname_format(buffer
, 0)) {
582 strcpy(ref_buffer
, buffer
);
585 *flag
|= REF_ISSYMREF
;
590 /* Is it a directory? */
591 if (S_ISDIR(st
.st_mode
)) {
597 * Anything else, just open it and try to use it as
600 fd
= open(path
, O_RDONLY
);
603 len
= read_in_full(fd
, buffer
, sizeof(buffer
)-1);
607 while (len
&& isspace(buffer
[len
-1]))
612 * Is it a symbolic ref?
614 if (prefixcmp(buffer
, "ref:"))
617 while (isspace(*buf
))
619 if (check_refname_format(buf
, REFNAME_ALLOW_ONELEVEL
)) {
620 warning("symbolic reference in %s is formatted incorrectly",
624 ref
= strcpy(ref_buffer
, buf
);
626 *flag
|= REF_ISSYMREF
;
628 /* Please note that FETCH_HEAD has a second line containing other data. */
629 if (get_sha1_hex(buffer
, sha1
) || (buffer
[40] != '\0' && !isspace(buffer
[40]))) {
630 warning("reference in %s is formatted incorrectly", path
);
636 /* The argument to filter_refs */
643 int read_ref(const char *ref
, unsigned char *sha1
)
645 if (resolve_ref(ref
, sha1
, 1, NULL
))
650 #define DO_FOR_EACH_INCLUDE_BROKEN 01
651 static int do_one_ref(const char *base
, each_ref_fn fn
, int trim
,
652 int flags
, void *cb_data
, struct ref_list
*entry
)
654 if (prefixcmp(entry
->name
, base
))
657 if (!(flags
& DO_FOR_EACH_INCLUDE_BROKEN
)) {
658 if (entry
->flag
& REF_BROKEN
)
659 return 0; /* ignore dangling symref */
660 if (!has_sha1_file(entry
->sha1
)) {
661 error("%s does not point to a valid object!", entry
->name
);
666 return fn(entry
->name
+ trim
, entry
->sha1
, entry
->flag
, cb_data
);
669 static int filter_refs(const char *ref
, const unsigned char *sha
, int flags
,
672 struct ref_filter
*filter
= (struct ref_filter
*)data
;
673 if (fnmatch(filter
->pattern
, ref
, 0))
675 return filter
->fn(ref
, sha
, flags
, filter
->cb_data
);
678 int peel_ref(const char *ref
, unsigned char *sha1
)
681 unsigned char base
[20];
684 if (current_ref
&& (current_ref
->name
== ref
685 || !strcmp(current_ref
->name
, ref
))) {
686 if (current_ref
->flag
& REF_KNOWS_PEELED
) {
687 hashcpy(sha1
, current_ref
->peeled
);
690 hashcpy(base
, current_ref
->sha1
);
694 if (!resolve_ref(ref
, base
, 1, &flag
))
697 if ((flag
& REF_ISPACKED
)) {
698 struct ref_list
*list
= get_packed_refs(NULL
);
701 if (!strcmp(list
->name
, ref
)) {
702 if (list
->flag
& REF_KNOWS_PEELED
) {
703 hashcpy(sha1
, list
->peeled
);
706 /* older pack-refs did not leave peeled ones */
714 o
= parse_object(base
);
715 if (o
&& o
->type
== OBJ_TAG
) {
716 o
= deref_tag(o
, ref
, 0);
718 hashcpy(sha1
, o
->sha1
);
725 static int do_for_each_ref(const char *submodule
, const char *base
, each_ref_fn fn
,
726 int trim
, int flags
, void *cb_data
)
729 struct ref_list
*packed
= get_packed_refs(submodule
);
730 struct ref_list
*loose
= get_loose_refs(submodule
);
732 struct ref_list
*extra
;
734 for (extra
= extra_refs
; extra
; extra
= extra
->next
)
735 retval
= do_one_ref(base
, fn
, trim
, flags
, cb_data
, extra
);
737 while (packed
&& loose
) {
738 struct ref_list
*entry
;
739 int cmp
= strcmp(packed
->name
, loose
->name
);
741 packed
= packed
->next
;
749 packed
= packed
->next
;
751 retval
= do_one_ref(base
, fn
, trim
, flags
, cb_data
, entry
);
756 for (packed
= packed
? packed
: loose
; packed
; packed
= packed
->next
) {
757 retval
= do_one_ref(base
, fn
, trim
, flags
, cb_data
, packed
);
768 static int do_head_ref(const char *submodule
, each_ref_fn fn
, void *cb_data
)
770 unsigned char sha1
[20];
774 if (resolve_gitlink_ref(submodule
, "HEAD", sha1
) == 0)
775 return fn("HEAD", sha1
, 0, cb_data
);
780 if (resolve_ref("HEAD", sha1
, 1, &flag
))
781 return fn("HEAD", sha1
, flag
, cb_data
);
786 int head_ref(each_ref_fn fn
, void *cb_data
)
788 return do_head_ref(NULL
, fn
, cb_data
);
791 int head_ref_submodule(const char *submodule
, each_ref_fn fn
, void *cb_data
)
793 return do_head_ref(submodule
, fn
, cb_data
);
796 int for_each_ref(each_ref_fn fn
, void *cb_data
)
798 return do_for_each_ref(NULL
, "", fn
, 0, 0, cb_data
);
801 int for_each_ref_submodule(const char *submodule
, each_ref_fn fn
, void *cb_data
)
803 return do_for_each_ref(submodule
, "", fn
, 0, 0, cb_data
);
806 int for_each_ref_in(const char *prefix
, each_ref_fn fn
, void *cb_data
)
808 return do_for_each_ref(NULL
, prefix
, fn
, strlen(prefix
), 0, cb_data
);
811 int for_each_ref_in_submodule(const char *submodule
, const char *prefix
,
812 each_ref_fn fn
, void *cb_data
)
814 return do_for_each_ref(submodule
, prefix
, fn
, strlen(prefix
), 0, cb_data
);
817 int for_each_tag_ref(each_ref_fn fn
, void *cb_data
)
819 return for_each_ref_in("refs/tags/", fn
, cb_data
);
822 int for_each_tag_ref_submodule(const char *submodule
, each_ref_fn fn
, void *cb_data
)
824 return for_each_ref_in_submodule(submodule
, "refs/tags/", fn
, cb_data
);
827 int for_each_branch_ref(each_ref_fn fn
, void *cb_data
)
829 return for_each_ref_in("refs/heads/", fn
, cb_data
);
832 int for_each_branch_ref_submodule(const char *submodule
, each_ref_fn fn
, void *cb_data
)
834 return for_each_ref_in_submodule(submodule
, "refs/heads/", fn
, cb_data
);
837 int for_each_remote_ref(each_ref_fn fn
, void *cb_data
)
839 return for_each_ref_in("refs/remotes/", fn
, cb_data
);
842 int for_each_remote_ref_submodule(const char *submodule
, each_ref_fn fn
, void *cb_data
)
844 return for_each_ref_in_submodule(submodule
, "refs/remotes/", fn
, cb_data
);
847 int for_each_replace_ref(each_ref_fn fn
, void *cb_data
)
849 return do_for_each_ref(NULL
, "refs/replace/", fn
, 13, 0, cb_data
);
852 int head_ref_namespaced(each_ref_fn fn
, void *cb_data
)
854 struct strbuf buf
= STRBUF_INIT
;
856 unsigned char sha1
[20];
859 strbuf_addf(&buf
, "%sHEAD", get_git_namespace());
860 if (resolve_ref(buf
.buf
, sha1
, 1, &flag
))
861 ret
= fn(buf
.buf
, sha1
, flag
, cb_data
);
862 strbuf_release(&buf
);
867 int for_each_namespaced_ref(each_ref_fn fn
, void *cb_data
)
869 struct strbuf buf
= STRBUF_INIT
;
871 strbuf_addf(&buf
, "%srefs/", get_git_namespace());
872 ret
= do_for_each_ref(NULL
, buf
.buf
, fn
, 0, 0, cb_data
);
873 strbuf_release(&buf
);
877 int for_each_glob_ref_in(each_ref_fn fn
, const char *pattern
,
878 const char *prefix
, void *cb_data
)
880 struct strbuf real_pattern
= STRBUF_INIT
;
881 struct ref_filter filter
;
884 if (!prefix
&& prefixcmp(pattern
, "refs/"))
885 strbuf_addstr(&real_pattern
, "refs/");
887 strbuf_addstr(&real_pattern
, prefix
);
888 strbuf_addstr(&real_pattern
, pattern
);
890 if (!has_glob_specials(pattern
)) {
891 /* Append implied '/' '*' if not present. */
892 if (real_pattern
.buf
[real_pattern
.len
- 1] != '/')
893 strbuf_addch(&real_pattern
, '/');
894 /* No need to check for '*', there is none. */
895 strbuf_addch(&real_pattern
, '*');
898 filter
.pattern
= real_pattern
.buf
;
900 filter
.cb_data
= cb_data
;
901 ret
= for_each_ref(filter_refs
, &filter
);
903 strbuf_release(&real_pattern
);
907 int for_each_glob_ref(each_ref_fn fn
, const char *pattern
, void *cb_data
)
909 return for_each_glob_ref_in(fn
, pattern
, NULL
, cb_data
);
912 int for_each_rawref(each_ref_fn fn
, void *cb_data
)
914 return do_for_each_ref(NULL
, "", fn
, 0,
915 DO_FOR_EACH_INCLUDE_BROKEN
, cb_data
);
919 * Make sure "ref" is something reasonable to have under ".git/refs/";
920 * We do not like it if:
922 * - any path component of it begins with ".", or
923 * - it has double dots "..", or
924 * - it has ASCII control character, "~", "^", ":" or SP, anywhere, or
925 * - it ends with a "/".
926 * - it ends with ".lock"
927 * - it contains a "\" (backslash)
930 /* Return true iff ch is not allowed in reference names. */
931 static inline int bad_ref_char(int ch
)
933 if (((unsigned) ch
) <= ' ' || ch
== 0x7f ||
934 ch
== '~' || ch
== '^' || ch
== ':' || ch
== '\\')
936 /* 2.13 Pattern Matching Notation */
937 if (ch
== '*' || ch
== '?' || ch
== '[') /* Unsupported */
943 * Try to read one refname component from the front of ref. Return
944 * the length of the component found, or -1 if the component is not
947 static int check_refname_component(const char *ref
, int flags
)
952 for (cp
= ref
; ; cp
++) {
954 if (ch
== '\0' || ch
== '/')
956 if (bad_ref_char(ch
))
957 return -1; /* Illegal character in refname. */
958 if (last
== '.' && ch
== '.')
959 return -1; /* Refname contains "..". */
960 if (last
== '@' && ch
== '{')
961 return -1; /* Refname contains "@{". */
965 return -1; /* Component has zero length. */
967 if (!(flags
& REFNAME_DOT_COMPONENT
))
968 return -1; /* Component starts with '.'. */
970 * Even if leading dots are allowed, don't allow "."
971 * as a component (".." is prevented by a rule above).
974 return -1; /* Component equals ".". */
976 if (cp
- ref
>= 5 && !memcmp(cp
- 5, ".lock", 5))
977 return -1; /* Refname ends with ".lock". */
981 int check_refname_format(const char *ref
, int flags
)
983 int component_len
, component_count
= 0;
986 /* We are at the start of a path component. */
987 component_len
= check_refname_component(ref
, flags
);
988 if (component_len
< 0) {
989 if ((flags
& REFNAME_REFSPEC_PATTERN
) &&
991 (ref
[1] == '\0' || ref
[1] == '/')) {
992 /* Accept one wildcard as a full refname component. */
993 flags
&= ~REFNAME_REFSPEC_PATTERN
;
1000 if (ref
[component_len
] == '\0')
1002 /* Skip to next component. */
1003 ref
+= component_len
+ 1;
1006 if (ref
[component_len
- 1] == '.')
1007 return -1; /* Refname ends with '.'. */
1008 if (!(flags
& REFNAME_ALLOW_ONELEVEL
) && component_count
< 2)
1009 return -1; /* Refname has only one component. */
1013 const char *prettify_refname(const char *name
)
1016 !prefixcmp(name
, "refs/heads/") ? 11 :
1017 !prefixcmp(name
, "refs/tags/") ? 10 :
1018 !prefixcmp(name
, "refs/remotes/") ? 13 :
1022 const char *ref_rev_parse_rules
[] = {
1027 "refs/remotes/%.*s",
1028 "refs/remotes/%.*s/HEAD",
1032 const char *ref_fetch_rules
[] = {
1039 int refname_match(const char *abbrev_name
, const char *full_name
, const char **rules
)
1042 const int abbrev_name_len
= strlen(abbrev_name
);
1044 for (p
= rules
; *p
; p
++) {
1045 if (!strcmp(full_name
, mkpath(*p
, abbrev_name_len
, abbrev_name
))) {
1053 static struct ref_lock
*verify_lock(struct ref_lock
*lock
,
1054 const unsigned char *old_sha1
, int mustexist
)
1056 if (!resolve_ref(lock
->ref_name
, lock
->old_sha1
, mustexist
, NULL
)) {
1057 error("Can't verify ref %s", lock
->ref_name
);
1061 if (hashcmp(lock
->old_sha1
, old_sha1
)) {
1062 error("Ref %s is at %s but expected %s", lock
->ref_name
,
1063 sha1_to_hex(lock
->old_sha1
), sha1_to_hex(old_sha1
));
1070 static int remove_empty_directories(const char *file
)
1072 /* we want to create a file but there is a directory there;
1073 * if that is an empty directory (or a directory that contains
1074 * only empty directories), remove them.
1079 strbuf_init(&path
, 20);
1080 strbuf_addstr(&path
, file
);
1082 result
= remove_dir_recursively(&path
, REMOVE_DIR_EMPTY_ONLY
);
1084 strbuf_release(&path
);
1089 static int is_refname_available(const char *ref
, const char *oldref
,
1090 struct ref_list
*list
, int quiet
)
1092 int namlen
= strlen(ref
); /* e.g. 'foo/bar' */
1094 /* list->name could be 'foo' or 'foo/bar/baz' */
1095 if (!oldref
|| strcmp(oldref
, list
->name
)) {
1096 int len
= strlen(list
->name
);
1097 int cmplen
= (namlen
< len
) ? namlen
: len
;
1098 const char *lead
= (namlen
< len
) ? list
->name
: ref
;
1099 if (!strncmp(ref
, list
->name
, cmplen
) &&
1100 lead
[cmplen
] == '/') {
1102 error("'%s' exists; cannot create '%s'",
1112 static struct ref_lock
*lock_ref_sha1_basic(const char *ref
, const unsigned char *old_sha1
, int flags
, int *type_p
)
1115 const char *orig_ref
= ref
;
1116 struct ref_lock
*lock
;
1119 int mustexist
= (old_sha1
&& !is_null_sha1(old_sha1
));
1122 lock
= xcalloc(1, sizeof(struct ref_lock
));
1125 ref
= resolve_ref(ref
, lock
->old_sha1
, mustexist
, &type
);
1126 if (!ref
&& errno
== EISDIR
) {
1127 /* we are trying to lock foo but we used to
1128 * have foo/bar which now does not exist;
1129 * it is normal for the empty directory 'foo'
1132 ref_file
= git_path("%s", orig_ref
);
1133 if (remove_empty_directories(ref_file
)) {
1135 error("there are still refs under '%s'", orig_ref
);
1138 ref
= resolve_ref(orig_ref
, lock
->old_sha1
, mustexist
, &type
);
1144 error("unable to resolve reference %s: %s",
1145 orig_ref
, strerror(errno
));
1148 missing
= is_null_sha1(lock
->old_sha1
);
1149 /* When the ref did not exist and we are creating it,
1150 * make sure there is no existing ref that is packed
1151 * whose name begins with our refname, nor a ref whose
1152 * name is a proper prefix of our refname.
1155 !is_refname_available(ref
, NULL
, get_packed_refs(NULL
), 0)) {
1156 last_errno
= ENOTDIR
;
1160 lock
->lk
= xcalloc(1, sizeof(struct lock_file
));
1162 lflags
= LOCK_DIE_ON_ERROR
;
1163 if (flags
& REF_NODEREF
) {
1165 lflags
|= LOCK_NODEREF
;
1167 lock
->ref_name
= xstrdup(ref
);
1168 lock
->orig_ref_name
= xstrdup(orig_ref
);
1169 ref_file
= git_path("%s", ref
);
1171 lock
->force_write
= 1;
1172 if ((flags
& REF_NODEREF
) && (type
& REF_ISSYMREF
))
1173 lock
->force_write
= 1;
1175 if (safe_create_leading_directories(ref_file
)) {
1177 error("unable to create directory for %s", ref_file
);
1181 lock
->lock_fd
= hold_lock_file_for_update(lock
->lk
, ref_file
, lflags
);
1182 return old_sha1
? verify_lock(lock
, old_sha1
, mustexist
) : lock
;
1190 struct ref_lock
*lock_ref_sha1(const char *ref
, const unsigned char *old_sha1
)
1192 char refpath
[PATH_MAX
];
1193 if (check_refname_format(ref
, 0))
1195 strcpy(refpath
, mkpath("refs/%s", ref
));
1196 return lock_ref_sha1_basic(refpath
, old_sha1
, 0, NULL
);
1199 struct ref_lock
*lock_any_ref_for_update(const char *ref
, const unsigned char *old_sha1
, int flags
)
1201 if (check_refname_format(ref
, REFNAME_ALLOW_ONELEVEL
))
1203 return lock_ref_sha1_basic(ref
, old_sha1
, flags
, NULL
);
1206 static struct lock_file packlock
;
1208 static int repack_without_ref(const char *refname
)
1210 struct ref_list
*list
, *packed_ref_list
;
1214 packed_ref_list
= get_packed_refs(NULL
);
1215 for (list
= packed_ref_list
; list
; list
= list
->next
) {
1216 if (!strcmp(refname
, list
->name
)) {
1223 fd
= hold_lock_file_for_update(&packlock
, git_path("packed-refs"), 0);
1225 unable_to_lock_error(git_path("packed-refs"), errno
);
1226 return error("cannot delete '%s' from packed refs", refname
);
1229 for (list
= packed_ref_list
; list
; list
= list
->next
) {
1230 char line
[PATH_MAX
+ 100];
1233 if (!strcmp(refname
, list
->name
))
1235 len
= snprintf(line
, sizeof(line
), "%s %s\n",
1236 sha1_to_hex(list
->sha1
), list
->name
);
1237 /* this should not happen but just being defensive */
1238 if (len
> sizeof(line
))
1239 die("too long a refname '%s'", list
->name
);
1240 write_or_die(fd
, line
, len
);
1242 return commit_lock_file(&packlock
);
1245 int delete_ref(const char *refname
, const unsigned char *sha1
, int delopt
)
1247 struct ref_lock
*lock
;
1248 int err
, i
= 0, ret
= 0, flag
= 0;
1250 lock
= lock_ref_sha1_basic(refname
, sha1
, 0, &flag
);
1253 if (!(flag
& REF_ISPACKED
) || flag
& REF_ISSYMREF
) {
1257 if (!(delopt
& REF_NODEREF
)) {
1258 i
= strlen(lock
->lk
->filename
) - 5; /* .lock */
1259 lock
->lk
->filename
[i
] = 0;
1260 path
= lock
->lk
->filename
;
1262 path
= git_path("%s", refname
);
1264 err
= unlink_or_warn(path
);
1265 if (err
&& errno
!= ENOENT
)
1268 if (!(delopt
& REF_NODEREF
))
1269 lock
->lk
->filename
[i
] = '.';
1271 /* removing the loose one could have resurrected an earlier
1272 * packed one. Also, if it was not loose we need to repack
1275 ret
|= repack_without_ref(refname
);
1277 unlink_or_warn(git_path("logs/%s", lock
->ref_name
));
1278 invalidate_cached_refs();
1284 * People using contrib's git-new-workdir have .git/logs/refs ->
1285 * /some/other/path/.git/logs/refs, and that may live on another device.
1287 * IOW, to avoid cross device rename errors, the temporary renamed log must
1288 * live into logs/refs.
1290 #define TMP_RENAMED_LOG "logs/refs/.tmp-renamed-log"
1292 int rename_ref(const char *oldref
, const char *newref
, const char *logmsg
)
1294 static const char renamed_ref
[] = "RENAMED-REF";
1295 unsigned char sha1
[20], orig_sha1
[20];
1296 int flag
= 0, logmoved
= 0;
1297 struct ref_lock
*lock
;
1298 struct stat loginfo
;
1299 int log
= !lstat(git_path("logs/%s", oldref
), &loginfo
);
1300 const char *symref
= NULL
;
1302 if (log
&& S_ISLNK(loginfo
.st_mode
))
1303 return error("reflog for %s is a symlink", oldref
);
1305 symref
= resolve_ref(oldref
, orig_sha1
, 1, &flag
);
1306 if (flag
& REF_ISSYMREF
)
1307 return error("refname %s is a symbolic ref, renaming it is not supported",
1310 return error("refname %s not found", oldref
);
1312 if (!is_refname_available(newref
, oldref
, get_packed_refs(NULL
), 0))
1315 if (!is_refname_available(newref
, oldref
, get_loose_refs(NULL
), 0))
1318 lock
= lock_ref_sha1_basic(renamed_ref
, NULL
, 0, NULL
);
1320 return error("unable to lock %s", renamed_ref
);
1321 lock
->force_write
= 1;
1322 if (write_ref_sha1(lock
, orig_sha1
, logmsg
))
1323 return error("unable to save current sha1 in %s", renamed_ref
);
1325 if (log
&& rename(git_path("logs/%s", oldref
), git_path(TMP_RENAMED_LOG
)))
1326 return error("unable to move logfile logs/%s to "TMP_RENAMED_LOG
": %s",
1327 oldref
, strerror(errno
));
1329 if (delete_ref(oldref
, orig_sha1
, REF_NODEREF
)) {
1330 error("unable to delete old %s", oldref
);
1334 if (resolve_ref(newref
, sha1
, 1, &flag
) && delete_ref(newref
, sha1
, REF_NODEREF
)) {
1335 if (errno
==EISDIR
) {
1336 if (remove_empty_directories(git_path("%s", newref
))) {
1337 error("Directory not empty: %s", newref
);
1341 error("unable to delete existing %s", newref
);
1346 if (log
&& safe_create_leading_directories(git_path("logs/%s", newref
))) {
1347 error("unable to create directory for %s", newref
);
1352 if (log
&& rename(git_path(TMP_RENAMED_LOG
), git_path("logs/%s", newref
))) {
1353 if (errno
==EISDIR
|| errno
==ENOTDIR
) {
1355 * rename(a, b) when b is an existing
1356 * directory ought to result in ISDIR, but
1357 * Solaris 5.8 gives ENOTDIR. Sheesh.
1359 if (remove_empty_directories(git_path("logs/%s", newref
))) {
1360 error("Directory not empty: logs/%s", newref
);
1365 error("unable to move logfile "TMP_RENAMED_LOG
" to logs/%s: %s",
1366 newref
, strerror(errno
));
1372 lock
= lock_ref_sha1_basic(newref
, NULL
, 0, NULL
);
1374 error("unable to lock %s for update", newref
);
1377 lock
->force_write
= 1;
1378 hashcpy(lock
->old_sha1
, orig_sha1
);
1379 if (write_ref_sha1(lock
, orig_sha1
, logmsg
)) {
1380 error("unable to write current sha1 into %s", newref
);
1387 lock
= lock_ref_sha1_basic(oldref
, NULL
, 0, NULL
);
1389 error("unable to lock %s for rollback", oldref
);
1393 lock
->force_write
= 1;
1394 flag
= log_all_ref_updates
;
1395 log_all_ref_updates
= 0;
1396 if (write_ref_sha1(lock
, orig_sha1
, NULL
))
1397 error("unable to write current sha1 into %s", oldref
);
1398 log_all_ref_updates
= flag
;
1401 if (logmoved
&& rename(git_path("logs/%s", newref
), git_path("logs/%s", oldref
)))
1402 error("unable to restore logfile %s from %s: %s",
1403 oldref
, newref
, strerror(errno
));
1404 if (!logmoved
&& log
&&
1405 rename(git_path(TMP_RENAMED_LOG
), git_path("logs/%s", oldref
)))
1406 error("unable to restore logfile %s from "TMP_RENAMED_LOG
": %s",
1407 oldref
, strerror(errno
));
1412 int close_ref(struct ref_lock
*lock
)
1414 if (close_lock_file(lock
->lk
))
1420 int commit_ref(struct ref_lock
*lock
)
1422 if (commit_lock_file(lock
->lk
))
1428 void unlock_ref(struct ref_lock
*lock
)
1430 /* Do not free lock->lk -- atexit() still looks at them */
1432 rollback_lock_file(lock
->lk
);
1433 free(lock
->ref_name
);
1434 free(lock
->orig_ref_name
);
1439 * copy the reflog message msg to buf, which has been allocated sufficiently
1440 * large, while cleaning up the whitespaces. Especially, convert LF to space,
1441 * because reflog file is one line per entry.
1443 static int copy_msg(char *buf
, const char *msg
)
1450 while ((c
= *msg
++)) {
1451 if (wasspace
&& isspace(c
))
1453 wasspace
= isspace(c
);
1458 while (buf
< cp
&& isspace(cp
[-1]))
1464 int log_ref_setup(const char *ref_name
, char *logfile
, int bufsize
)
1466 int logfd
, oflags
= O_APPEND
| O_WRONLY
;
1468 git_snpath(logfile
, bufsize
, "logs/%s", ref_name
);
1469 if (log_all_ref_updates
&&
1470 (!prefixcmp(ref_name
, "refs/heads/") ||
1471 !prefixcmp(ref_name
, "refs/remotes/") ||
1472 !prefixcmp(ref_name
, "refs/notes/") ||
1473 !strcmp(ref_name
, "HEAD"))) {
1474 if (safe_create_leading_directories(logfile
) < 0)
1475 return error("unable to create directory for %s",
1480 logfd
= open(logfile
, oflags
, 0666);
1482 if (!(oflags
& O_CREAT
) && errno
== ENOENT
)
1485 if ((oflags
& O_CREAT
) && errno
== EISDIR
) {
1486 if (remove_empty_directories(logfile
)) {
1487 return error("There are still logs under '%s'",
1490 logfd
= open(logfile
, oflags
, 0666);
1494 return error("Unable to append to %s: %s",
1495 logfile
, strerror(errno
));
1498 adjust_shared_perm(logfile
);
1503 static int log_ref_write(const char *ref_name
, const unsigned char *old_sha1
,
1504 const unsigned char *new_sha1
, const char *msg
)
1506 int logfd
, result
, written
, oflags
= O_APPEND
| O_WRONLY
;
1507 unsigned maxlen
, len
;
1509 char log_file
[PATH_MAX
];
1511 const char *committer
;
1513 if (log_all_ref_updates
< 0)
1514 log_all_ref_updates
= !is_bare_repository();
1516 result
= log_ref_setup(ref_name
, log_file
, sizeof(log_file
));
1520 logfd
= open(log_file
, oflags
);
1523 msglen
= msg
? strlen(msg
) : 0;
1524 committer
= git_committer_info(0);
1525 maxlen
= strlen(committer
) + msglen
+ 100;
1526 logrec
= xmalloc(maxlen
);
1527 len
= sprintf(logrec
, "%s %s %s\n",
1528 sha1_to_hex(old_sha1
),
1529 sha1_to_hex(new_sha1
),
1532 len
+= copy_msg(logrec
+ len
- 1, msg
) - 1;
1533 written
= len
<= maxlen
? write_in_full(logfd
, logrec
, len
) : -1;
1535 if (close(logfd
) != 0 || written
!= len
)
1536 return error("Unable to append to %s", log_file
);
1540 static int is_branch(const char *refname
)
1542 return !strcmp(refname
, "HEAD") || !prefixcmp(refname
, "refs/heads/");
1545 int write_ref_sha1(struct ref_lock
*lock
,
1546 const unsigned char *sha1
, const char *logmsg
)
1548 static char term
= '\n';
1553 if (!lock
->force_write
&& !hashcmp(lock
->old_sha1
, sha1
)) {
1557 o
= parse_object(sha1
);
1559 error("Trying to write ref %s with nonexistent object %s",
1560 lock
->ref_name
, sha1_to_hex(sha1
));
1564 if (o
->type
!= OBJ_COMMIT
&& is_branch(lock
->ref_name
)) {
1565 error("Trying to write non-commit object %s to branch %s",
1566 sha1_to_hex(sha1
), lock
->ref_name
);
1570 if (write_in_full(lock
->lock_fd
, sha1_to_hex(sha1
), 40) != 40 ||
1571 write_in_full(lock
->lock_fd
, &term
, 1) != 1
1572 || close_ref(lock
) < 0) {
1573 error("Couldn't write %s", lock
->lk
->filename
);
1577 invalidate_cached_refs();
1578 if (log_ref_write(lock
->ref_name
, lock
->old_sha1
, sha1
, logmsg
) < 0 ||
1579 (strcmp(lock
->ref_name
, lock
->orig_ref_name
) &&
1580 log_ref_write(lock
->orig_ref_name
, lock
->old_sha1
, sha1
, logmsg
) < 0)) {
1584 if (strcmp(lock
->orig_ref_name
, "HEAD") != 0) {
1586 * Special hack: If a branch is updated directly and HEAD
1587 * points to it (may happen on the remote side of a push
1588 * for example) then logically the HEAD reflog should be
1590 * A generic solution implies reverse symref information,
1591 * but finding all symrefs pointing to the given branch
1592 * would be rather costly for this rare event (the direct
1593 * update of a branch) to be worth it. So let's cheat and
1594 * check with HEAD only which should cover 99% of all usage
1595 * scenarios (even 100% of the default ones).
1597 unsigned char head_sha1
[20];
1599 const char *head_ref
;
1600 head_ref
= resolve_ref("HEAD", head_sha1
, 1, &head_flag
);
1601 if (head_ref
&& (head_flag
& REF_ISSYMREF
) &&
1602 !strcmp(head_ref
, lock
->ref_name
))
1603 log_ref_write("HEAD", lock
->old_sha1
, sha1
, logmsg
);
1605 if (commit_ref(lock
)) {
1606 error("Couldn't set %s", lock
->ref_name
);
1614 int create_symref(const char *ref_target
, const char *refs_heads_master
,
1617 const char *lockpath
;
1619 int fd
, len
, written
;
1620 char *git_HEAD
= git_pathdup("%s", ref_target
);
1621 unsigned char old_sha1
[20], new_sha1
[20];
1623 if (logmsg
&& read_ref(ref_target
, old_sha1
))
1626 if (safe_create_leading_directories(git_HEAD
) < 0)
1627 return error("unable to create directory for %s", git_HEAD
);
1629 #ifndef NO_SYMLINK_HEAD
1630 if (prefer_symlink_refs
) {
1632 if (!symlink(refs_heads_master
, git_HEAD
))
1634 fprintf(stderr
, "no symlink - falling back to symbolic ref\n");
1638 len
= snprintf(ref
, sizeof(ref
), "ref: %s\n", refs_heads_master
);
1639 if (sizeof(ref
) <= len
) {
1640 error("refname too long: %s", refs_heads_master
);
1641 goto error_free_return
;
1643 lockpath
= mkpath("%s.lock", git_HEAD
);
1644 fd
= open(lockpath
, O_CREAT
| O_EXCL
| O_WRONLY
, 0666);
1646 error("Unable to open %s for writing", lockpath
);
1647 goto error_free_return
;
1649 written
= write_in_full(fd
, ref
, len
);
1650 if (close(fd
) != 0 || written
!= len
) {
1651 error("Unable to write to %s", lockpath
);
1652 goto error_unlink_return
;
1654 if (rename(lockpath
, git_HEAD
) < 0) {
1655 error("Unable to create %s", git_HEAD
);
1656 goto error_unlink_return
;
1658 if (adjust_shared_perm(git_HEAD
)) {
1659 error("Unable to fix permissions on %s", lockpath
);
1660 error_unlink_return
:
1661 unlink_or_warn(lockpath
);
1667 #ifndef NO_SYMLINK_HEAD
1670 if (logmsg
&& !read_ref(refs_heads_master
, new_sha1
))
1671 log_ref_write(ref_target
, old_sha1
, new_sha1
, logmsg
);
1677 static char *ref_msg(const char *line
, const char *endp
)
1681 ep
= memchr(line
, '\n', endp
- line
);
1684 return xmemdupz(line
, ep
- line
);
1687 int read_ref_at(const char *ref
, unsigned long at_time
, int cnt
, unsigned char *sha1
, char **msg
, unsigned long *cutoff_time
, int *cutoff_tz
, int *cutoff_cnt
)
1689 const char *logfile
, *logdata
, *logend
, *rec
, *lastgt
, *lastrec
;
1691 int logfd
, tz
, reccnt
= 0;
1694 unsigned char logged_sha1
[20];
1698 logfile
= git_path("logs/%s", ref
);
1699 logfd
= open(logfile
, O_RDONLY
, 0);
1701 die_errno("Unable to read log '%s'", logfile
);
1704 die("Log %s is empty.", logfile
);
1705 mapsz
= xsize_t(st
.st_size
);
1706 log_mapped
= xmmap(NULL
, mapsz
, PROT_READ
, MAP_PRIVATE
, logfd
, 0);
1707 logdata
= log_mapped
;
1711 rec
= logend
= logdata
+ st
.st_size
;
1712 while (logdata
< rec
) {
1714 if (logdata
< rec
&& *(rec
-1) == '\n')
1717 while (logdata
< rec
&& *(rec
-1) != '\n') {
1723 die("Log %s is corrupt.", logfile
);
1724 date
= strtoul(lastgt
+ 1, &tz_c
, 10);
1725 if (date
<= at_time
|| cnt
== 0) {
1726 tz
= strtoul(tz_c
, NULL
, 10);
1728 *msg
= ref_msg(rec
, logend
);
1730 *cutoff_time
= date
;
1734 *cutoff_cnt
= reccnt
- 1;
1736 if (get_sha1_hex(lastrec
, logged_sha1
))
1737 die("Log %s is corrupt.", logfile
);
1738 if (get_sha1_hex(rec
+ 41, sha1
))
1739 die("Log %s is corrupt.", logfile
);
1740 if (hashcmp(logged_sha1
, sha1
)) {
1741 warning("Log %s has gap after %s.",
1742 logfile
, show_date(date
, tz
, DATE_RFC2822
));
1745 else if (date
== at_time
) {
1746 if (get_sha1_hex(rec
+ 41, sha1
))
1747 die("Log %s is corrupt.", logfile
);
1750 if (get_sha1_hex(rec
+ 41, logged_sha1
))
1751 die("Log %s is corrupt.", logfile
);
1752 if (hashcmp(logged_sha1
, sha1
)) {
1753 warning("Log %s unexpectedly ended on %s.",
1754 logfile
, show_date(date
, tz
, DATE_RFC2822
));
1757 munmap(log_mapped
, mapsz
);
1766 while (rec
< logend
&& *rec
!= '>' && *rec
!= '\n')
1768 if (rec
== logend
|| *rec
== '\n')
1769 die("Log %s is corrupt.", logfile
);
1770 date
= strtoul(rec
+ 1, &tz_c
, 10);
1771 tz
= strtoul(tz_c
, NULL
, 10);
1772 if (get_sha1_hex(logdata
, sha1
))
1773 die("Log %s is corrupt.", logfile
);
1774 if (is_null_sha1(sha1
)) {
1775 if (get_sha1_hex(logdata
+ 41, sha1
))
1776 die("Log %s is corrupt.", logfile
);
1779 *msg
= ref_msg(logdata
, logend
);
1780 munmap(log_mapped
, mapsz
);
1783 *cutoff_time
= date
;
1787 *cutoff_cnt
= reccnt
;
1791 int for_each_recent_reflog_ent(const char *ref
, each_reflog_ent_fn fn
, long ofs
, void *cb_data
)
1793 const char *logfile
;
1795 struct strbuf sb
= STRBUF_INIT
;
1798 logfile
= git_path("logs/%s", ref
);
1799 logfp
= fopen(logfile
, "r");
1804 struct stat statbuf
;
1805 if (fstat(fileno(logfp
), &statbuf
) ||
1806 statbuf
.st_size
< ofs
||
1807 fseek(logfp
, -ofs
, SEEK_END
) ||
1808 strbuf_getwholeline(&sb
, logfp
, '\n')) {
1810 strbuf_release(&sb
);
1815 while (!strbuf_getwholeline(&sb
, logfp
, '\n')) {
1816 unsigned char osha1
[20], nsha1
[20];
1817 char *email_end
, *message
;
1818 unsigned long timestamp
;
1821 /* old SP new SP name <email> SP time TAB msg LF */
1822 if (sb
.len
< 83 || sb
.buf
[sb
.len
- 1] != '\n' ||
1823 get_sha1_hex(sb
.buf
, osha1
) || sb
.buf
[40] != ' ' ||
1824 get_sha1_hex(sb
.buf
+ 41, nsha1
) || sb
.buf
[81] != ' ' ||
1825 !(email_end
= strchr(sb
.buf
+ 82, '>')) ||
1826 email_end
[1] != ' ' ||
1827 !(timestamp
= strtoul(email_end
+ 2, &message
, 10)) ||
1828 !message
|| message
[0] != ' ' ||
1829 (message
[1] != '+' && message
[1] != '-') ||
1830 !isdigit(message
[2]) || !isdigit(message
[3]) ||
1831 !isdigit(message
[4]) || !isdigit(message
[5]))
1832 continue; /* corrupt? */
1833 email_end
[1] = '\0';
1834 tz
= strtol(message
+ 1, NULL
, 10);
1835 if (message
[6] != '\t')
1839 ret
= fn(osha1
, nsha1
, sb
.buf
+ 82, timestamp
, tz
, message
,
1845 strbuf_release(&sb
);
1849 int for_each_reflog_ent(const char *ref
, each_reflog_ent_fn fn
, void *cb_data
)
1851 return for_each_recent_reflog_ent(ref
, fn
, 0, cb_data
);
1854 static int do_for_each_reflog(const char *base
, each_ref_fn fn
, void *cb_data
)
1856 DIR *dir
= opendir(git_path("logs/%s", base
));
1861 int baselen
= strlen(base
);
1862 char *log
= xmalloc(baselen
+ 257);
1864 memcpy(log
, base
, baselen
);
1865 if (baselen
&& base
[baselen
-1] != '/')
1866 log
[baselen
++] = '/';
1868 while ((de
= readdir(dir
)) != NULL
) {
1872 if (de
->d_name
[0] == '.')
1874 namelen
= strlen(de
->d_name
);
1877 if (has_extension(de
->d_name
, ".lock"))
1879 memcpy(log
+ baselen
, de
->d_name
, namelen
+1);
1880 if (stat(git_path("logs/%s", log
), &st
) < 0)
1882 if (S_ISDIR(st
.st_mode
)) {
1883 retval
= do_for_each_reflog(log
, fn
, cb_data
);
1885 unsigned char sha1
[20];
1886 if (!resolve_ref(log
, sha1
, 0, NULL
))
1887 retval
= error("bad ref for %s", log
);
1889 retval
= fn(log
, sha1
, 0, cb_data
);
1902 int for_each_reflog(each_ref_fn fn
, void *cb_data
)
1904 return do_for_each_reflog("", fn
, cb_data
);
1907 int update_ref(const char *action
, const char *refname
,
1908 const unsigned char *sha1
, const unsigned char *oldval
,
1909 int flags
, enum action_on_err onerr
)
1911 static struct ref_lock
*lock
;
1912 lock
= lock_any_ref_for_update(refname
, oldval
, flags
);
1914 const char *str
= "Cannot lock the ref '%s'.";
1916 case MSG_ON_ERR
: error(str
, refname
); break;
1917 case DIE_ON_ERR
: die(str
, refname
); break;
1918 case QUIET_ON_ERR
: break;
1922 if (write_ref_sha1(lock
, sha1
, action
) < 0) {
1923 const char *str
= "Cannot update the ref '%s'.";
1925 case MSG_ON_ERR
: error(str
, refname
); break;
1926 case DIE_ON_ERR
: die(str
, refname
); break;
1927 case QUIET_ON_ERR
: break;
1934 int ref_exists(char *refname
)
1936 unsigned char sha1
[20];
1937 return !!resolve_ref(refname
, sha1
, 1, NULL
);
1940 struct ref
*find_ref_by_name(const struct ref
*list
, const char *name
)
1942 for ( ; list
; list
= list
->next
)
1943 if (!strcmp(list
->name
, name
))
1944 return (struct ref
*)list
;
1949 * generate a format suitable for scanf from a ref_rev_parse_rules
1950 * rule, that is replace the "%.*s" spec with a "%s" spec
1952 static void gen_scanf_fmt(char *scanf_fmt
, const char *rule
)
1956 spec
= strstr(rule
, "%.*s");
1957 if (!spec
|| strstr(spec
+ 4, "%.*s"))
1958 die("invalid rule in ref_rev_parse_rules: %s", rule
);
1960 /* copy all until spec */
1961 strncpy(scanf_fmt
, rule
, spec
- rule
);
1962 scanf_fmt
[spec
- rule
] = '\0';
1964 strcat(scanf_fmt
, "%s");
1965 /* copy remaining rule */
1966 strcat(scanf_fmt
, spec
+ 4);
1971 char *shorten_unambiguous_ref(const char *ref
, int strict
)
1974 static char **scanf_fmts
;
1975 static int nr_rules
;
1978 /* pre generate scanf formats from ref_rev_parse_rules[] */
1980 size_t total_len
= 0;
1982 /* the rule list is NULL terminated, count them first */
1983 for (; ref_rev_parse_rules
[nr_rules
]; nr_rules
++)
1984 /* no +1 because strlen("%s") < strlen("%.*s") */
1985 total_len
+= strlen(ref_rev_parse_rules
[nr_rules
]);
1987 scanf_fmts
= xmalloc(nr_rules
* sizeof(char *) + total_len
);
1990 for (i
= 0; i
< nr_rules
; i
++) {
1991 scanf_fmts
[i
] = (char *)&scanf_fmts
[nr_rules
]
1993 gen_scanf_fmt(scanf_fmts
[i
], ref_rev_parse_rules
[i
]);
1994 total_len
+= strlen(ref_rev_parse_rules
[i
]);
1998 /* bail out if there are no rules */
2000 return xstrdup(ref
);
2002 /* buffer for scanf result, at most ref must fit */
2003 short_name
= xstrdup(ref
);
2005 /* skip first rule, it will always match */
2006 for (i
= nr_rules
- 1; i
> 0 ; --i
) {
2008 int rules_to_fail
= i
;
2011 if (1 != sscanf(ref
, scanf_fmts
[i
], short_name
))
2014 short_name_len
= strlen(short_name
);
2017 * in strict mode, all (except the matched one) rules
2018 * must fail to resolve to a valid non-ambiguous ref
2021 rules_to_fail
= nr_rules
;
2024 * check if the short name resolves to a valid ref,
2025 * but use only rules prior to the matched one
2027 for (j
= 0; j
< rules_to_fail
; j
++) {
2028 const char *rule
= ref_rev_parse_rules
[j
];
2029 unsigned char short_objectname
[20];
2030 char refname
[PATH_MAX
];
2032 /* skip matched rule */
2037 * the short name is ambiguous, if it resolves
2038 * (with this previous rule) to a valid ref
2039 * read_ref() returns 0 on success
2041 mksnpath(refname
, sizeof(refname
),
2042 rule
, short_name_len
, short_name
);
2043 if (!read_ref(refname
, short_objectname
))
2048 * short name is non-ambiguous if all previous rules
2049 * haven't resolved to a valid ref
2051 if (j
== rules_to_fail
)
2056 return xstrdup(ref
);