7 /* ISSYMREF=01 and ISPACKED=02 are public interfaces */
8 #define REF_KNOWS_PEELED 04
12 unsigned char flag
; /* ISSYMREF? ISPACKED? */
13 unsigned char sha1
[20];
14 unsigned char peeled
[20];
15 char name
[FLEX_ARRAY
];
20 struct ref_entry
**refs
;
23 static const char *parse_ref_line(char *line
, unsigned char *sha1
)
26 * 42: the answer to everything.
28 * In this case, it happens to be the answer to
29 * 40 (length of sha1 hex representation)
30 * +1 (space in between hex and name)
31 * +1 (newline at the end of the line)
33 int len
= strlen(line
) - 42;
37 if (get_sha1_hex(line
, sha1
) < 0)
39 if (!isspace(line
[40]))
44 if (line
[len
] != '\n')
51 static void add_ref(const char *name
, const unsigned char *sha1
,
52 int flag
, struct ref_array
*refs
,
53 struct ref_entry
**new_entry
)
56 struct ref_entry
*entry
;
58 /* Allocate it and add it in.. */
59 len
= strlen(name
) + 1;
60 entry
= xmalloc(sizeof(struct ref_entry
) + len
);
61 hashcpy(entry
->sha1
, sha1
);
62 hashclr(entry
->peeled
);
63 if (check_refname_format(name
, REFNAME_ALLOW_ONELEVEL
|REFNAME_DOT_COMPONENT
))
64 die("Reference has invalid format: '%s'", name
);
65 memcpy(entry
->name
, name
, len
);
69 ALLOC_GROW(refs
->refs
, refs
->nr
+ 1, refs
->alloc
);
70 refs
->refs
[refs
->nr
++] = entry
;
73 static int ref_entry_cmp(const void *a
, const void *b
)
75 struct ref_entry
*one
= *(struct ref_entry
**)a
;
76 struct ref_entry
*two
= *(struct ref_entry
**)b
;
77 return strcmp(one
->name
, two
->name
);
80 static void sort_ref_array(struct ref_array
*array
)
84 /* Nothing to sort unless there are at least two entries */
88 qsort(array
->refs
, array
->nr
, sizeof(*array
->refs
), ref_entry_cmp
);
90 /* Remove any duplicates from the ref_array */
91 for (; j
< array
->nr
; j
++) {
92 struct ref_entry
*a
= array
->refs
[i
];
93 struct ref_entry
*b
= array
->refs
[j
];
94 if (!strcmp(a
->name
, b
->name
)) {
95 if (hashcmp(a
->sha1
, b
->sha1
))
96 die("Duplicated ref, and SHA1s don't match: %s",
98 warning("Duplicated ref: %s", a
->name
);
103 array
->refs
[i
] = array
->refs
[j
];
108 static struct ref_entry
*search_ref_array(struct ref_array
*array
, const char *name
)
110 struct ref_entry
*e
, **r
;
119 len
= strlen(name
) + 1;
120 e
= xmalloc(sizeof(struct ref_entry
) + len
);
121 memcpy(e
->name
, name
, len
);
123 r
= bsearch(&e
, array
->refs
, array
->nr
, sizeof(*array
->refs
), ref_entry_cmp
);
134 * Future: need to be in "struct repository"
135 * when doing a full libification.
137 static struct ref_cache
{
138 struct ref_cache
*next
;
141 struct ref_array loose
;
142 struct ref_array packed
;
143 /* The submodule name, or "" for the main repo. */
144 char name
[FLEX_ARRAY
];
147 static struct ref_entry
*current_ref
;
149 static struct ref_array extra_refs
;
151 static void free_ref_array(struct ref_array
*array
)
154 for (i
= 0; i
< array
->nr
; i
++)
155 free(array
->refs
[i
]);
157 array
->nr
= array
->alloc
= 0;
161 static void clear_ref_cache(struct ref_cache
*refs
)
164 free_ref_array(&refs
->loose
);
165 if (refs
->did_packed
)
166 free_ref_array(&refs
->packed
);
167 refs
->did_loose
= refs
->did_packed
= 0;
170 static struct ref_cache
*create_ref_cache(const char *submodule
)
173 struct ref_cache
*refs
;
176 len
= strlen(submodule
) + 1;
177 refs
= xcalloc(1, sizeof(struct ref_cache
) + len
);
178 memcpy(refs
->name
, submodule
, len
);
183 * Return a pointer to a ref_cache for the specified submodule. For
184 * the main repository, use submodule==NULL. The returned structure
185 * will be allocated and initialized but not necessarily populated; it
186 * should not be freed.
188 static struct ref_cache
*get_ref_cache(const char *submodule
)
190 struct ref_cache
*refs
= ref_cache
;
194 if (!strcmp(submodule
, refs
->name
))
199 refs
= create_ref_cache(submodule
);
200 refs
->next
= ref_cache
;
205 void invalidate_ref_cache(const char *submodule
)
207 clear_ref_cache(get_ref_cache(submodule
));
210 static void read_packed_refs(FILE *f
, struct ref_array
*array
)
212 struct ref_entry
*last
= NULL
;
213 char refline
[PATH_MAX
];
214 int flag
= REF_ISPACKED
;
216 while (fgets(refline
, sizeof(refline
), f
)) {
217 unsigned char sha1
[20];
219 static const char header
[] = "# pack-refs with:";
221 if (!strncmp(refline
, header
, sizeof(header
)-1)) {
222 const char *traits
= refline
+ sizeof(header
) - 1;
223 if (strstr(traits
, " peeled "))
224 flag
|= REF_KNOWS_PEELED
;
225 /* perhaps other traits later as well */
229 name
= parse_ref_line(refline
, sha1
);
231 add_ref(name
, sha1
, flag
, array
, &last
);
236 strlen(refline
) == 42 &&
237 refline
[41] == '\n' &&
238 !get_sha1_hex(refline
+ 1, sha1
))
239 hashcpy(last
->peeled
, sha1
);
241 sort_ref_array(array
);
244 void add_extra_ref(const char *name
, const unsigned char *sha1
, int flag
)
246 add_ref(name
, sha1
, flag
, &extra_refs
, NULL
);
249 void clear_extra_refs(void)
251 free_ref_array(&extra_refs
);
254 static struct ref_array
*get_packed_refs(const char *submodule
)
256 struct ref_cache
*refs
= get_ref_cache(submodule
);
258 if (!refs
->did_packed
) {
259 const char *packed_refs_file
;
263 packed_refs_file
= git_path_submodule(submodule
, "packed-refs");
265 packed_refs_file
= git_path("packed-refs");
266 f
= fopen(packed_refs_file
, "r");
268 read_packed_refs(f
, &refs
->packed
);
271 refs
->did_packed
= 1;
273 return &refs
->packed
;
276 static void get_ref_dir(const char *submodule
, const char *base
,
277 struct ref_array
*array
)
283 path
= git_path_submodule(submodule
, "%s", base
);
285 path
= git_path("%s", base
);
292 int baselen
= strlen(base
);
293 char *ref
= xmalloc(baselen
+ 257);
295 memcpy(ref
, base
, baselen
);
296 if (baselen
&& base
[baselen
-1] != '/')
297 ref
[baselen
++] = '/';
299 while ((de
= readdir(dir
)) != NULL
) {
300 unsigned char sha1
[20];
306 if (de
->d_name
[0] == '.')
308 namelen
= strlen(de
->d_name
);
311 if (has_extension(de
->d_name
, ".lock"))
313 memcpy(ref
+ baselen
, de
->d_name
, namelen
+1);
315 ? git_path_submodule(submodule
, "%s", ref
)
316 : git_path("%s", ref
);
317 if (stat(refdir
, &st
) < 0)
319 if (S_ISDIR(st
.st_mode
)) {
320 get_ref_dir(submodule
, ref
, array
);
326 if (resolve_gitlink_ref(submodule
, ref
, sha1
) < 0) {
331 if (!resolve_ref(ref
, sha1
, 1, &flag
)) {
335 add_ref(ref
, sha1
, flag
, array
, NULL
);
342 struct warn_if_dangling_data
{
348 static int warn_if_dangling_symref(const char *refname
, const unsigned char *sha1
,
349 int flags
, void *cb_data
)
351 struct warn_if_dangling_data
*d
= cb_data
;
352 const char *resolves_to
;
353 unsigned char junk
[20];
355 if (!(flags
& REF_ISSYMREF
))
358 resolves_to
= resolve_ref(refname
, junk
, 0, NULL
);
359 if (!resolves_to
|| strcmp(resolves_to
, d
->refname
))
362 fprintf(d
->fp
, d
->msg_fmt
, refname
);
366 void warn_dangling_symref(FILE *fp
, const char *msg_fmt
, const char *refname
)
368 struct warn_if_dangling_data data
;
371 data
.refname
= refname
;
372 data
.msg_fmt
= msg_fmt
;
373 for_each_rawref(warn_if_dangling_symref
, &data
);
376 static struct ref_array
*get_loose_refs(const char *submodule
)
378 struct ref_cache
*refs
= get_ref_cache(submodule
);
380 if (!refs
->did_loose
) {
381 get_ref_dir(submodule
, "refs", &refs
->loose
);
382 sort_ref_array(&refs
->loose
);
388 /* We allow "recursive" symbolic refs. Only within reason, though */
390 #define MAXREFLEN (1024)
392 static int resolve_gitlink_packed_ref(char *name
, int pathlen
, const char *refname
, unsigned char *result
)
395 struct ref_entry
*ref
;
396 struct ref_array
*array
= get_packed_refs(name
);
398 ref
= search_ref_array(array
, refname
);
400 memcpy(result
, ref
->sha1
, 20);
406 static int resolve_gitlink_ref_recursive(char *name
, int pathlen
, const char *refname
, unsigned char *result
, int recursion
)
408 int fd
, len
= strlen(refname
);
409 char buffer
[128], *p
;
411 if (recursion
> MAXDEPTH
|| len
> MAXREFLEN
)
413 memcpy(name
+ pathlen
, refname
, len
+1);
414 fd
= open(name
, O_RDONLY
);
416 return resolve_gitlink_packed_ref(name
, pathlen
, refname
, result
);
418 len
= read(fd
, buffer
, sizeof(buffer
)-1);
422 while (len
&& isspace(buffer
[len
-1]))
426 /* Was it a detached head or an old-fashioned symlink? */
427 if (!get_sha1_hex(buffer
, result
))
431 if (strncmp(buffer
, "ref:", 4))
437 return resolve_gitlink_ref_recursive(name
, pathlen
, p
, result
, recursion
+1);
440 int resolve_gitlink_ref(const char *path
, const char *refname
, unsigned char *result
)
442 int len
= strlen(path
), retval
;
446 while (len
&& path
[len
-1] == '/')
450 gitdir
= xmalloc(len
+ MAXREFLEN
+ 8);
451 memcpy(gitdir
, path
, len
);
452 memcpy(gitdir
+ len
, "/.git", 6);
455 tmp
= read_gitfile(gitdir
);
459 gitdir
= xmalloc(len
+ MAXREFLEN
+ 3);
460 memcpy(gitdir
, tmp
, len
);
463 gitdir
[++len
] = '\0';
464 retval
= resolve_gitlink_ref_recursive(gitdir
, len
, refname
, result
, 0);
470 * Try to read ref from the packed references. On success, set sha1
471 * and return 0; otherwise, return -1.
473 static int get_packed_ref(const char *ref
, unsigned char *sha1
)
475 struct ref_array
*packed
= get_packed_refs(NULL
);
476 struct ref_entry
*entry
= search_ref_array(packed
, ref
);
478 hashcpy(sha1
, entry
->sha1
);
484 const char *resolve_ref(const char *ref
, unsigned char *sha1
, int reading
, int *flag
)
486 int depth
= MAXDEPTH
;
489 static char ref_buffer
[256];
495 if (check_refname_format(ref
, REFNAME_ALLOW_ONELEVEL
))
506 git_snpath(path
, sizeof(path
), "%s", ref
);
508 if (lstat(path
, &st
) < 0) {
512 * The loose reference file does not exist;
513 * check for a packed reference.
515 if (!get_packed_ref(ref
, sha1
)) {
517 *flag
|= REF_ISPACKED
;
520 /* The reference is not a packed reference, either. */
529 /* Follow "normalized" - ie "refs/.." symlinks by hand */
530 if (S_ISLNK(st
.st_mode
)) {
531 len
= readlink(path
, buffer
, sizeof(buffer
)-1);
535 if (!prefixcmp(buffer
, "refs/") &&
536 !check_refname_format(buffer
, 0)) {
537 strcpy(ref_buffer
, buffer
);
540 *flag
|= REF_ISSYMREF
;
545 /* Is it a directory? */
546 if (S_ISDIR(st
.st_mode
)) {
552 * Anything else, just open it and try to use it as
555 fd
= open(path
, O_RDONLY
);
558 len
= read_in_full(fd
, buffer
, sizeof(buffer
)-1);
562 while (len
&& isspace(buffer
[len
-1]))
567 * Is it a symbolic ref?
569 if (prefixcmp(buffer
, "ref:"))
572 while (isspace(*buf
))
574 if (check_refname_format(buf
, REFNAME_ALLOW_ONELEVEL
)) {
575 warning("symbolic reference in %s is formatted incorrectly",
579 ref
= strcpy(ref_buffer
, buf
);
581 *flag
|= REF_ISSYMREF
;
583 /* Please note that FETCH_HEAD has a second line containing other data. */
584 if (get_sha1_hex(buffer
, sha1
) || (buffer
[40] != '\0' && !isspace(buffer
[40]))) {
585 warning("reference in %s is formatted incorrectly", path
);
591 /* The argument to filter_refs */
598 int read_ref(const char *ref
, unsigned char *sha1
)
600 if (resolve_ref(ref
, sha1
, 1, NULL
))
605 #define DO_FOR_EACH_INCLUDE_BROKEN 01
606 static int do_one_ref(const char *base
, each_ref_fn fn
, int trim
,
607 int flags
, void *cb_data
, struct ref_entry
*entry
)
609 if (prefixcmp(entry
->name
, base
))
612 if (!(flags
& DO_FOR_EACH_INCLUDE_BROKEN
)) {
613 if (entry
->flag
& REF_BROKEN
)
614 return 0; /* ignore dangling symref */
615 if (!has_sha1_file(entry
->sha1
)) {
616 error("%s does not point to a valid object!", entry
->name
);
621 return fn(entry
->name
+ trim
, entry
->sha1
, entry
->flag
, cb_data
);
624 static int filter_refs(const char *ref
, const unsigned char *sha
, int flags
,
627 struct ref_filter
*filter
= (struct ref_filter
*)data
;
628 if (fnmatch(filter
->pattern
, ref
, 0))
630 return filter
->fn(ref
, sha
, flags
, filter
->cb_data
);
633 int peel_ref(const char *ref
, unsigned char *sha1
)
636 unsigned char base
[20];
639 if (current_ref
&& (current_ref
->name
== ref
640 || !strcmp(current_ref
->name
, ref
))) {
641 if (current_ref
->flag
& REF_KNOWS_PEELED
) {
642 hashcpy(sha1
, current_ref
->peeled
);
645 hashcpy(base
, current_ref
->sha1
);
649 if (!resolve_ref(ref
, base
, 1, &flag
))
652 if ((flag
& REF_ISPACKED
)) {
653 struct ref_array
*array
= get_packed_refs(NULL
);
654 struct ref_entry
*r
= search_ref_array(array
, ref
);
656 if (r
!= NULL
&& r
->flag
& REF_KNOWS_PEELED
) {
657 hashcpy(sha1
, r
->peeled
);
663 o
= parse_object(base
);
664 if (o
&& o
->type
== OBJ_TAG
) {
665 o
= deref_tag(o
, ref
, 0);
667 hashcpy(sha1
, o
->sha1
);
674 static int do_for_each_ref(const char *submodule
, const char *base
, each_ref_fn fn
,
675 int trim
, int flags
, void *cb_data
)
677 int retval
= 0, i
, p
= 0, l
= 0;
678 struct ref_array
*packed
= get_packed_refs(submodule
);
679 struct ref_array
*loose
= get_loose_refs(submodule
);
681 struct ref_array
*extra
= &extra_refs
;
683 for (i
= 0; i
< extra
->nr
; i
++)
684 retval
= do_one_ref(base
, fn
, trim
, flags
, cb_data
, extra
->refs
[i
]);
686 while (p
< packed
->nr
&& l
< loose
->nr
) {
687 struct ref_entry
*entry
;
688 int cmp
= strcmp(packed
->refs
[p
]->name
, loose
->refs
[l
]->name
);
694 entry
= loose
->refs
[l
++];
696 entry
= packed
->refs
[p
++];
698 retval
= do_one_ref(base
, fn
, trim
, flags
, cb_data
, entry
);
708 for (; p
< packed
->nr
; p
++) {
709 retval
= do_one_ref(base
, fn
, trim
, flags
, cb_data
, packed
->refs
[p
]);
720 static int do_head_ref(const char *submodule
, each_ref_fn fn
, void *cb_data
)
722 unsigned char sha1
[20];
726 if (resolve_gitlink_ref(submodule
, "HEAD", sha1
) == 0)
727 return fn("HEAD", sha1
, 0, cb_data
);
732 if (resolve_ref("HEAD", sha1
, 1, &flag
))
733 return fn("HEAD", sha1
, flag
, cb_data
);
738 int head_ref(each_ref_fn fn
, void *cb_data
)
740 return do_head_ref(NULL
, fn
, cb_data
);
743 int head_ref_submodule(const char *submodule
, each_ref_fn fn
, void *cb_data
)
745 return do_head_ref(submodule
, fn
, cb_data
);
748 int for_each_ref(each_ref_fn fn
, void *cb_data
)
750 return do_for_each_ref(NULL
, "", fn
, 0, 0, cb_data
);
753 int for_each_ref_submodule(const char *submodule
, each_ref_fn fn
, void *cb_data
)
755 return do_for_each_ref(submodule
, "", fn
, 0, 0, cb_data
);
758 int for_each_ref_in(const char *prefix
, each_ref_fn fn
, void *cb_data
)
760 return do_for_each_ref(NULL
, prefix
, fn
, strlen(prefix
), 0, cb_data
);
763 int for_each_ref_in_submodule(const char *submodule
, const char *prefix
,
764 each_ref_fn fn
, void *cb_data
)
766 return do_for_each_ref(submodule
, prefix
, fn
, strlen(prefix
), 0, cb_data
);
769 int for_each_tag_ref(each_ref_fn fn
, void *cb_data
)
771 return for_each_ref_in("refs/tags/", fn
, cb_data
);
774 int for_each_tag_ref_submodule(const char *submodule
, each_ref_fn fn
, void *cb_data
)
776 return for_each_ref_in_submodule(submodule
, "refs/tags/", fn
, cb_data
);
779 int for_each_branch_ref(each_ref_fn fn
, void *cb_data
)
781 return for_each_ref_in("refs/heads/", fn
, cb_data
);
784 int for_each_branch_ref_submodule(const char *submodule
, each_ref_fn fn
, void *cb_data
)
786 return for_each_ref_in_submodule(submodule
, "refs/heads/", fn
, cb_data
);
789 int for_each_remote_ref(each_ref_fn fn
, void *cb_data
)
791 return for_each_ref_in("refs/remotes/", fn
, cb_data
);
794 int for_each_remote_ref_submodule(const char *submodule
, each_ref_fn fn
, void *cb_data
)
796 return for_each_ref_in_submodule(submodule
, "refs/remotes/", fn
, cb_data
);
799 int for_each_replace_ref(each_ref_fn fn
, void *cb_data
)
801 return do_for_each_ref(NULL
, "refs/replace/", fn
, 13, 0, cb_data
);
804 int head_ref_namespaced(each_ref_fn fn
, void *cb_data
)
806 struct strbuf buf
= STRBUF_INIT
;
808 unsigned char sha1
[20];
811 strbuf_addf(&buf
, "%sHEAD", get_git_namespace());
812 if (resolve_ref(buf
.buf
, sha1
, 1, &flag
))
813 ret
= fn(buf
.buf
, sha1
, flag
, cb_data
);
814 strbuf_release(&buf
);
819 int for_each_namespaced_ref(each_ref_fn fn
, void *cb_data
)
821 struct strbuf buf
= STRBUF_INIT
;
823 strbuf_addf(&buf
, "%srefs/", get_git_namespace());
824 ret
= do_for_each_ref(NULL
, buf
.buf
, fn
, 0, 0, cb_data
);
825 strbuf_release(&buf
);
829 int for_each_glob_ref_in(each_ref_fn fn
, const char *pattern
,
830 const char *prefix
, void *cb_data
)
832 struct strbuf real_pattern
= STRBUF_INIT
;
833 struct ref_filter filter
;
836 if (!prefix
&& prefixcmp(pattern
, "refs/"))
837 strbuf_addstr(&real_pattern
, "refs/");
839 strbuf_addstr(&real_pattern
, prefix
);
840 strbuf_addstr(&real_pattern
, pattern
);
842 if (!has_glob_specials(pattern
)) {
843 /* Append implied '/' '*' if not present. */
844 if (real_pattern
.buf
[real_pattern
.len
- 1] != '/')
845 strbuf_addch(&real_pattern
, '/');
846 /* No need to check for '*', there is none. */
847 strbuf_addch(&real_pattern
, '*');
850 filter
.pattern
= real_pattern
.buf
;
852 filter
.cb_data
= cb_data
;
853 ret
= for_each_ref(filter_refs
, &filter
);
855 strbuf_release(&real_pattern
);
859 int for_each_glob_ref(each_ref_fn fn
, const char *pattern
, void *cb_data
)
861 return for_each_glob_ref_in(fn
, pattern
, NULL
, cb_data
);
864 int for_each_rawref(each_ref_fn fn
, void *cb_data
)
866 return do_for_each_ref(NULL
, "", fn
, 0,
867 DO_FOR_EACH_INCLUDE_BROKEN
, cb_data
);
871 * Make sure "ref" is something reasonable to have under ".git/refs/";
872 * We do not like it if:
874 * - any path component of it begins with ".", or
875 * - it has double dots "..", or
876 * - it has ASCII control character, "~", "^", ":" or SP, anywhere, or
877 * - it ends with a "/".
878 * - it ends with ".lock"
879 * - it contains a "\" (backslash)
882 /* Return true iff ch is not allowed in reference names. */
883 static inline int bad_ref_char(int ch
)
885 if (((unsigned) ch
) <= ' ' || ch
== 0x7f ||
886 ch
== '~' || ch
== '^' || ch
== ':' || ch
== '\\')
888 /* 2.13 Pattern Matching Notation */
889 if (ch
== '*' || ch
== '?' || ch
== '[') /* Unsupported */
895 * Try to read one refname component from the front of ref. Return
896 * the length of the component found, or -1 if the component is not
899 static int check_refname_component(const char *ref
, int flags
)
904 for (cp
= ref
; ; cp
++) {
906 if (ch
== '\0' || ch
== '/')
908 if (bad_ref_char(ch
))
909 return -1; /* Illegal character in refname. */
910 if (last
== '.' && ch
== '.')
911 return -1; /* Refname contains "..". */
912 if (last
== '@' && ch
== '{')
913 return -1; /* Refname contains "@{". */
917 return -1; /* Component has zero length. */
919 if (!(flags
& REFNAME_DOT_COMPONENT
))
920 return -1; /* Component starts with '.'. */
922 * Even if leading dots are allowed, don't allow "."
923 * as a component (".." is prevented by a rule above).
926 return -1; /* Component equals ".". */
928 if (cp
- ref
>= 5 && !memcmp(cp
- 5, ".lock", 5))
929 return -1; /* Refname ends with ".lock". */
933 int check_refname_format(const char *ref
, int flags
)
935 int component_len
, component_count
= 0;
938 /* We are at the start of a path component. */
939 component_len
= check_refname_component(ref
, flags
);
940 if (component_len
< 0) {
941 if ((flags
& REFNAME_REFSPEC_PATTERN
) &&
943 (ref
[1] == '\0' || ref
[1] == '/')) {
944 /* Accept one wildcard as a full refname component. */
945 flags
&= ~REFNAME_REFSPEC_PATTERN
;
952 if (ref
[component_len
] == '\0')
954 /* Skip to next component. */
955 ref
+= component_len
+ 1;
958 if (ref
[component_len
- 1] == '.')
959 return -1; /* Refname ends with '.'. */
960 if (!(flags
& REFNAME_ALLOW_ONELEVEL
) && component_count
< 2)
961 return -1; /* Refname has only one component. */
965 const char *prettify_refname(const char *name
)
968 !prefixcmp(name
, "refs/heads/") ? 11 :
969 !prefixcmp(name
, "refs/tags/") ? 10 :
970 !prefixcmp(name
, "refs/remotes/") ? 13 :
974 const char *ref_rev_parse_rules
[] = {
980 "refs/remotes/%.*s/HEAD",
984 const char *ref_fetch_rules
[] = {
991 int refname_match(const char *abbrev_name
, const char *full_name
, const char **rules
)
994 const int abbrev_name_len
= strlen(abbrev_name
);
996 for (p
= rules
; *p
; p
++) {
997 if (!strcmp(full_name
, mkpath(*p
, abbrev_name_len
, abbrev_name
))) {
1005 static struct ref_lock
*verify_lock(struct ref_lock
*lock
,
1006 const unsigned char *old_sha1
, int mustexist
)
1008 if (!resolve_ref(lock
->ref_name
, lock
->old_sha1
, mustexist
, NULL
)) {
1009 error("Can't verify ref %s", lock
->ref_name
);
1013 if (hashcmp(lock
->old_sha1
, old_sha1
)) {
1014 error("Ref %s is at %s but expected %s", lock
->ref_name
,
1015 sha1_to_hex(lock
->old_sha1
), sha1_to_hex(old_sha1
));
1022 static int remove_empty_directories(const char *file
)
1024 /* we want to create a file but there is a directory there;
1025 * if that is an empty directory (or a directory that contains
1026 * only empty directories), remove them.
1031 strbuf_init(&path
, 20);
1032 strbuf_addstr(&path
, file
);
1034 result
= remove_dir_recursively(&path
, REMOVE_DIR_EMPTY_ONLY
);
1036 strbuf_release(&path
);
1041 static int is_refname_available(const char *ref
, const char *oldref
,
1042 struct ref_array
*array
, int quiet
)
1044 int i
, namlen
= strlen(ref
); /* e.g. 'foo/bar' */
1045 for (i
= 0; i
< array
->nr
; i
++ ) {
1046 struct ref_entry
*entry
= array
->refs
[i
];
1047 /* entry->name could be 'foo' or 'foo/bar/baz' */
1048 if (!oldref
|| strcmp(oldref
, entry
->name
)) {
1049 int len
= strlen(entry
->name
);
1050 int cmplen
= (namlen
< len
) ? namlen
: len
;
1051 const char *lead
= (namlen
< len
) ? entry
->name
: ref
;
1052 if (!strncmp(ref
, entry
->name
, cmplen
) &&
1053 lead
[cmplen
] == '/') {
1055 error("'%s' exists; cannot create '%s'",
1064 static struct ref_lock
*lock_ref_sha1_basic(const char *ref
, const unsigned char *old_sha1
, int flags
, int *type_p
)
1067 const char *orig_ref
= ref
;
1068 struct ref_lock
*lock
;
1071 int mustexist
= (old_sha1
&& !is_null_sha1(old_sha1
));
1074 lock
= xcalloc(1, sizeof(struct ref_lock
));
1077 ref
= resolve_ref(ref
, lock
->old_sha1
, mustexist
, &type
);
1078 if (!ref
&& errno
== EISDIR
) {
1079 /* we are trying to lock foo but we used to
1080 * have foo/bar which now does not exist;
1081 * it is normal for the empty directory 'foo'
1084 ref_file
= git_path("%s", orig_ref
);
1085 if (remove_empty_directories(ref_file
)) {
1087 error("there are still refs under '%s'", orig_ref
);
1090 ref
= resolve_ref(orig_ref
, lock
->old_sha1
, mustexist
, &type
);
1096 error("unable to resolve reference %s: %s",
1097 orig_ref
, strerror(errno
));
1100 missing
= is_null_sha1(lock
->old_sha1
);
1101 /* When the ref did not exist and we are creating it,
1102 * make sure there is no existing ref that is packed
1103 * whose name begins with our refname, nor a ref whose
1104 * name is a proper prefix of our refname.
1107 !is_refname_available(ref
, NULL
, get_packed_refs(NULL
), 0)) {
1108 last_errno
= ENOTDIR
;
1112 lock
->lk
= xcalloc(1, sizeof(struct lock_file
));
1114 lflags
= LOCK_DIE_ON_ERROR
;
1115 if (flags
& REF_NODEREF
) {
1117 lflags
|= LOCK_NODEREF
;
1119 lock
->ref_name
= xstrdup(ref
);
1120 lock
->orig_ref_name
= xstrdup(orig_ref
);
1121 ref_file
= git_path("%s", ref
);
1123 lock
->force_write
= 1;
1124 if ((flags
& REF_NODEREF
) && (type
& REF_ISSYMREF
))
1125 lock
->force_write
= 1;
1127 if (safe_create_leading_directories(ref_file
)) {
1129 error("unable to create directory for %s", ref_file
);
1133 lock
->lock_fd
= hold_lock_file_for_update(lock
->lk
, ref_file
, lflags
);
1134 return old_sha1
? verify_lock(lock
, old_sha1
, mustexist
) : lock
;
1142 struct ref_lock
*lock_ref_sha1(const char *ref
, const unsigned char *old_sha1
)
1144 char refpath
[PATH_MAX
];
1145 if (check_refname_format(ref
, 0))
1147 strcpy(refpath
, mkpath("refs/%s", ref
));
1148 return lock_ref_sha1_basic(refpath
, old_sha1
, 0, NULL
);
1151 struct ref_lock
*lock_any_ref_for_update(const char *ref
, const unsigned char *old_sha1
, int flags
)
1153 if (check_refname_format(ref
, REFNAME_ALLOW_ONELEVEL
))
1155 return lock_ref_sha1_basic(ref
, old_sha1
, flags
, NULL
);
1158 static struct lock_file packlock
;
1160 static int repack_without_ref(const char *refname
)
1162 struct ref_array
*packed
;
1163 struct ref_entry
*ref
;
1166 packed
= get_packed_refs(NULL
);
1167 ref
= search_ref_array(packed
, refname
);
1170 fd
= hold_lock_file_for_update(&packlock
, git_path("packed-refs"), 0);
1172 unable_to_lock_error(git_path("packed-refs"), errno
);
1173 return error("cannot delete '%s' from packed refs", refname
);
1176 for (i
= 0; i
< packed
->nr
; i
++) {
1177 char line
[PATH_MAX
+ 100];
1180 ref
= packed
->refs
[i
];
1182 if (!strcmp(refname
, ref
->name
))
1184 len
= snprintf(line
, sizeof(line
), "%s %s\n",
1185 sha1_to_hex(ref
->sha1
), ref
->name
);
1186 /* this should not happen but just being defensive */
1187 if (len
> sizeof(line
))
1188 die("too long a refname '%s'", ref
->name
);
1189 write_or_die(fd
, line
, len
);
1191 return commit_lock_file(&packlock
);
1194 int delete_ref(const char *refname
, const unsigned char *sha1
, int delopt
)
1196 struct ref_lock
*lock
;
1197 int err
, i
= 0, ret
= 0, flag
= 0;
1199 lock
= lock_ref_sha1_basic(refname
, sha1
, 0, &flag
);
1202 if (!(flag
& REF_ISPACKED
) || flag
& REF_ISSYMREF
) {
1206 if (!(delopt
& REF_NODEREF
)) {
1207 i
= strlen(lock
->lk
->filename
) - 5; /* .lock */
1208 lock
->lk
->filename
[i
] = 0;
1209 path
= lock
->lk
->filename
;
1211 path
= git_path("%s", refname
);
1213 err
= unlink_or_warn(path
);
1214 if (err
&& errno
!= ENOENT
)
1217 if (!(delopt
& REF_NODEREF
))
1218 lock
->lk
->filename
[i
] = '.';
1220 /* removing the loose one could have resurrected an earlier
1221 * packed one. Also, if it was not loose we need to repack
1224 ret
|= repack_without_ref(refname
);
1226 unlink_or_warn(git_path("logs/%s", lock
->ref_name
));
1227 invalidate_ref_cache(NULL
);
1233 * People using contrib's git-new-workdir have .git/logs/refs ->
1234 * /some/other/path/.git/logs/refs, and that may live on another device.
1236 * IOW, to avoid cross device rename errors, the temporary renamed log must
1237 * live into logs/refs.
1239 #define TMP_RENAMED_LOG "logs/refs/.tmp-renamed-log"
1241 int rename_ref(const char *oldref
, const char *newref
, const char *logmsg
)
1243 static const char renamed_ref
[] = "RENAMED-REF";
1244 unsigned char sha1
[20], orig_sha1
[20];
1245 int flag
= 0, logmoved
= 0;
1246 struct ref_lock
*lock
;
1247 struct stat loginfo
;
1248 int log
= !lstat(git_path("logs/%s", oldref
), &loginfo
);
1249 const char *symref
= NULL
;
1251 if (log
&& S_ISLNK(loginfo
.st_mode
))
1252 return error("reflog for %s is a symlink", oldref
);
1254 symref
= resolve_ref(oldref
, orig_sha1
, 1, &flag
);
1255 if (flag
& REF_ISSYMREF
)
1256 return error("refname %s is a symbolic ref, renaming it is not supported",
1259 return error("refname %s not found", oldref
);
1261 if (!is_refname_available(newref
, oldref
, get_packed_refs(NULL
), 0))
1264 if (!is_refname_available(newref
, oldref
, get_loose_refs(NULL
), 0))
1267 lock
= lock_ref_sha1_basic(renamed_ref
, NULL
, 0, NULL
);
1269 return error("unable to lock %s", renamed_ref
);
1270 lock
->force_write
= 1;
1271 if (write_ref_sha1(lock
, orig_sha1
, logmsg
))
1272 return error("unable to save current sha1 in %s", renamed_ref
);
1274 if (log
&& rename(git_path("logs/%s", oldref
), git_path(TMP_RENAMED_LOG
)))
1275 return error("unable to move logfile logs/%s to "TMP_RENAMED_LOG
": %s",
1276 oldref
, strerror(errno
));
1278 if (delete_ref(oldref
, orig_sha1
, REF_NODEREF
)) {
1279 error("unable to delete old %s", oldref
);
1283 if (resolve_ref(newref
, sha1
, 1, &flag
) && delete_ref(newref
, sha1
, REF_NODEREF
)) {
1284 if (errno
==EISDIR
) {
1285 if (remove_empty_directories(git_path("%s", newref
))) {
1286 error("Directory not empty: %s", newref
);
1290 error("unable to delete existing %s", newref
);
1295 if (log
&& safe_create_leading_directories(git_path("logs/%s", newref
))) {
1296 error("unable to create directory for %s", newref
);
1301 if (log
&& rename(git_path(TMP_RENAMED_LOG
), git_path("logs/%s", newref
))) {
1302 if (errno
==EISDIR
|| errno
==ENOTDIR
) {
1304 * rename(a, b) when b is an existing
1305 * directory ought to result in ISDIR, but
1306 * Solaris 5.8 gives ENOTDIR. Sheesh.
1308 if (remove_empty_directories(git_path("logs/%s", newref
))) {
1309 error("Directory not empty: logs/%s", newref
);
1314 error("unable to move logfile "TMP_RENAMED_LOG
" to logs/%s: %s",
1315 newref
, strerror(errno
));
1321 lock
= lock_ref_sha1_basic(newref
, NULL
, 0, NULL
);
1323 error("unable to lock %s for update", newref
);
1326 lock
->force_write
= 1;
1327 hashcpy(lock
->old_sha1
, orig_sha1
);
1328 if (write_ref_sha1(lock
, orig_sha1
, logmsg
)) {
1329 error("unable to write current sha1 into %s", newref
);
1336 lock
= lock_ref_sha1_basic(oldref
, NULL
, 0, NULL
);
1338 error("unable to lock %s for rollback", oldref
);
1342 lock
->force_write
= 1;
1343 flag
= log_all_ref_updates
;
1344 log_all_ref_updates
= 0;
1345 if (write_ref_sha1(lock
, orig_sha1
, NULL
))
1346 error("unable to write current sha1 into %s", oldref
);
1347 log_all_ref_updates
= flag
;
1350 if (logmoved
&& rename(git_path("logs/%s", newref
), git_path("logs/%s", oldref
)))
1351 error("unable to restore logfile %s from %s: %s",
1352 oldref
, newref
, strerror(errno
));
1353 if (!logmoved
&& log
&&
1354 rename(git_path(TMP_RENAMED_LOG
), git_path("logs/%s", oldref
)))
1355 error("unable to restore logfile %s from "TMP_RENAMED_LOG
": %s",
1356 oldref
, strerror(errno
));
1361 int close_ref(struct ref_lock
*lock
)
1363 if (close_lock_file(lock
->lk
))
1369 int commit_ref(struct ref_lock
*lock
)
1371 if (commit_lock_file(lock
->lk
))
1377 void unlock_ref(struct ref_lock
*lock
)
1379 /* Do not free lock->lk -- atexit() still looks at them */
1381 rollback_lock_file(lock
->lk
);
1382 free(lock
->ref_name
);
1383 free(lock
->orig_ref_name
);
1388 * copy the reflog message msg to buf, which has been allocated sufficiently
1389 * large, while cleaning up the whitespaces. Especially, convert LF to space,
1390 * because reflog file is one line per entry.
1392 static int copy_msg(char *buf
, const char *msg
)
1399 while ((c
= *msg
++)) {
1400 if (wasspace
&& isspace(c
))
1402 wasspace
= isspace(c
);
1407 while (buf
< cp
&& isspace(cp
[-1]))
1413 int log_ref_setup(const char *ref_name
, char *logfile
, int bufsize
)
1415 int logfd
, oflags
= O_APPEND
| O_WRONLY
;
1417 git_snpath(logfile
, bufsize
, "logs/%s", ref_name
);
1418 if (log_all_ref_updates
&&
1419 (!prefixcmp(ref_name
, "refs/heads/") ||
1420 !prefixcmp(ref_name
, "refs/remotes/") ||
1421 !prefixcmp(ref_name
, "refs/notes/") ||
1422 !strcmp(ref_name
, "HEAD"))) {
1423 if (safe_create_leading_directories(logfile
) < 0)
1424 return error("unable to create directory for %s",
1429 logfd
= open(logfile
, oflags
, 0666);
1431 if (!(oflags
& O_CREAT
) && errno
== ENOENT
)
1434 if ((oflags
& O_CREAT
) && errno
== EISDIR
) {
1435 if (remove_empty_directories(logfile
)) {
1436 return error("There are still logs under '%s'",
1439 logfd
= open(logfile
, oflags
, 0666);
1443 return error("Unable to append to %s: %s",
1444 logfile
, strerror(errno
));
1447 adjust_shared_perm(logfile
);
1452 static int log_ref_write(const char *ref_name
, const unsigned char *old_sha1
,
1453 const unsigned char *new_sha1
, const char *msg
)
1455 int logfd
, result
, written
, oflags
= O_APPEND
| O_WRONLY
;
1456 unsigned maxlen
, len
;
1458 char log_file
[PATH_MAX
];
1460 const char *committer
;
1462 if (log_all_ref_updates
< 0)
1463 log_all_ref_updates
= !is_bare_repository();
1465 result
= log_ref_setup(ref_name
, log_file
, sizeof(log_file
));
1469 logfd
= open(log_file
, oflags
);
1472 msglen
= msg
? strlen(msg
) : 0;
1473 committer
= git_committer_info(0);
1474 maxlen
= strlen(committer
) + msglen
+ 100;
1475 logrec
= xmalloc(maxlen
);
1476 len
= sprintf(logrec
, "%s %s %s\n",
1477 sha1_to_hex(old_sha1
),
1478 sha1_to_hex(new_sha1
),
1481 len
+= copy_msg(logrec
+ len
- 1, msg
) - 1;
1482 written
= len
<= maxlen
? write_in_full(logfd
, logrec
, len
) : -1;
1484 if (close(logfd
) != 0 || written
!= len
)
1485 return error("Unable to append to %s", log_file
);
1489 static int is_branch(const char *refname
)
1491 return !strcmp(refname
, "HEAD") || !prefixcmp(refname
, "refs/heads/");
1494 int write_ref_sha1(struct ref_lock
*lock
,
1495 const unsigned char *sha1
, const char *logmsg
)
1497 static char term
= '\n';
1502 if (!lock
->force_write
&& !hashcmp(lock
->old_sha1
, sha1
)) {
1506 o
= parse_object(sha1
);
1508 error("Trying to write ref %s with nonexistent object %s",
1509 lock
->ref_name
, sha1_to_hex(sha1
));
1513 if (o
->type
!= OBJ_COMMIT
&& is_branch(lock
->ref_name
)) {
1514 error("Trying to write non-commit object %s to branch %s",
1515 sha1_to_hex(sha1
), lock
->ref_name
);
1519 if (write_in_full(lock
->lock_fd
, sha1_to_hex(sha1
), 40) != 40 ||
1520 write_in_full(lock
->lock_fd
, &term
, 1) != 1
1521 || close_ref(lock
) < 0) {
1522 error("Couldn't write %s", lock
->lk
->filename
);
1526 invalidate_ref_cache(NULL
);
1527 if (log_ref_write(lock
->ref_name
, lock
->old_sha1
, sha1
, logmsg
) < 0 ||
1528 (strcmp(lock
->ref_name
, lock
->orig_ref_name
) &&
1529 log_ref_write(lock
->orig_ref_name
, lock
->old_sha1
, sha1
, logmsg
) < 0)) {
1533 if (strcmp(lock
->orig_ref_name
, "HEAD") != 0) {
1535 * Special hack: If a branch is updated directly and HEAD
1536 * points to it (may happen on the remote side of a push
1537 * for example) then logically the HEAD reflog should be
1539 * A generic solution implies reverse symref information,
1540 * but finding all symrefs pointing to the given branch
1541 * would be rather costly for this rare event (the direct
1542 * update of a branch) to be worth it. So let's cheat and
1543 * check with HEAD only which should cover 99% of all usage
1544 * scenarios (even 100% of the default ones).
1546 unsigned char head_sha1
[20];
1548 const char *head_ref
;
1549 head_ref
= resolve_ref("HEAD", head_sha1
, 1, &head_flag
);
1550 if (head_ref
&& (head_flag
& REF_ISSYMREF
) &&
1551 !strcmp(head_ref
, lock
->ref_name
))
1552 log_ref_write("HEAD", lock
->old_sha1
, sha1
, logmsg
);
1554 if (commit_ref(lock
)) {
1555 error("Couldn't set %s", lock
->ref_name
);
1563 int create_symref(const char *ref_target
, const char *refs_heads_master
,
1566 const char *lockpath
;
1568 int fd
, len
, written
;
1569 char *git_HEAD
= git_pathdup("%s", ref_target
);
1570 unsigned char old_sha1
[20], new_sha1
[20];
1572 if (logmsg
&& read_ref(ref_target
, old_sha1
))
1575 if (safe_create_leading_directories(git_HEAD
) < 0)
1576 return error("unable to create directory for %s", git_HEAD
);
1578 #ifndef NO_SYMLINK_HEAD
1579 if (prefer_symlink_refs
) {
1581 if (!symlink(refs_heads_master
, git_HEAD
))
1583 fprintf(stderr
, "no symlink - falling back to symbolic ref\n");
1587 len
= snprintf(ref
, sizeof(ref
), "ref: %s\n", refs_heads_master
);
1588 if (sizeof(ref
) <= len
) {
1589 error("refname too long: %s", refs_heads_master
);
1590 goto error_free_return
;
1592 lockpath
= mkpath("%s.lock", git_HEAD
);
1593 fd
= open(lockpath
, O_CREAT
| O_EXCL
| O_WRONLY
, 0666);
1595 error("Unable to open %s for writing", lockpath
);
1596 goto error_free_return
;
1598 written
= write_in_full(fd
, ref
, len
);
1599 if (close(fd
) != 0 || written
!= len
) {
1600 error("Unable to write to %s", lockpath
);
1601 goto error_unlink_return
;
1603 if (rename(lockpath
, git_HEAD
) < 0) {
1604 error("Unable to create %s", git_HEAD
);
1605 goto error_unlink_return
;
1607 if (adjust_shared_perm(git_HEAD
)) {
1608 error("Unable to fix permissions on %s", lockpath
);
1609 error_unlink_return
:
1610 unlink_or_warn(lockpath
);
1616 #ifndef NO_SYMLINK_HEAD
1619 if (logmsg
&& !read_ref(refs_heads_master
, new_sha1
))
1620 log_ref_write(ref_target
, old_sha1
, new_sha1
, logmsg
);
1626 static char *ref_msg(const char *line
, const char *endp
)
1630 ep
= memchr(line
, '\n', endp
- line
);
1633 return xmemdupz(line
, ep
- line
);
1636 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
)
1638 const char *logfile
, *logdata
, *logend
, *rec
, *lastgt
, *lastrec
;
1640 int logfd
, tz
, reccnt
= 0;
1643 unsigned char logged_sha1
[20];
1647 logfile
= git_path("logs/%s", ref
);
1648 logfd
= open(logfile
, O_RDONLY
, 0);
1650 die_errno("Unable to read log '%s'", logfile
);
1653 die("Log %s is empty.", logfile
);
1654 mapsz
= xsize_t(st
.st_size
);
1655 log_mapped
= xmmap(NULL
, mapsz
, PROT_READ
, MAP_PRIVATE
, logfd
, 0);
1656 logdata
= log_mapped
;
1660 rec
= logend
= logdata
+ st
.st_size
;
1661 while (logdata
< rec
) {
1663 if (logdata
< rec
&& *(rec
-1) == '\n')
1666 while (logdata
< rec
&& *(rec
-1) != '\n') {
1672 die("Log %s is corrupt.", logfile
);
1673 date
= strtoul(lastgt
+ 1, &tz_c
, 10);
1674 if (date
<= at_time
|| cnt
== 0) {
1675 tz
= strtoul(tz_c
, NULL
, 10);
1677 *msg
= ref_msg(rec
, logend
);
1679 *cutoff_time
= date
;
1683 *cutoff_cnt
= reccnt
- 1;
1685 if (get_sha1_hex(lastrec
, logged_sha1
))
1686 die("Log %s is corrupt.", logfile
);
1687 if (get_sha1_hex(rec
+ 41, sha1
))
1688 die("Log %s is corrupt.", logfile
);
1689 if (hashcmp(logged_sha1
, sha1
)) {
1690 warning("Log %s has gap after %s.",
1691 logfile
, show_date(date
, tz
, DATE_RFC2822
));
1694 else if (date
== at_time
) {
1695 if (get_sha1_hex(rec
+ 41, sha1
))
1696 die("Log %s is corrupt.", logfile
);
1699 if (get_sha1_hex(rec
+ 41, logged_sha1
))
1700 die("Log %s is corrupt.", logfile
);
1701 if (hashcmp(logged_sha1
, sha1
)) {
1702 warning("Log %s unexpectedly ended on %s.",
1703 logfile
, show_date(date
, tz
, DATE_RFC2822
));
1706 munmap(log_mapped
, mapsz
);
1715 while (rec
< logend
&& *rec
!= '>' && *rec
!= '\n')
1717 if (rec
== logend
|| *rec
== '\n')
1718 die("Log %s is corrupt.", logfile
);
1719 date
= strtoul(rec
+ 1, &tz_c
, 10);
1720 tz
= strtoul(tz_c
, NULL
, 10);
1721 if (get_sha1_hex(logdata
, sha1
))
1722 die("Log %s is corrupt.", logfile
);
1723 if (is_null_sha1(sha1
)) {
1724 if (get_sha1_hex(logdata
+ 41, sha1
))
1725 die("Log %s is corrupt.", logfile
);
1728 *msg
= ref_msg(logdata
, logend
);
1729 munmap(log_mapped
, mapsz
);
1732 *cutoff_time
= date
;
1736 *cutoff_cnt
= reccnt
;
1740 int for_each_recent_reflog_ent(const char *ref
, each_reflog_ent_fn fn
, long ofs
, void *cb_data
)
1742 const char *logfile
;
1744 struct strbuf sb
= STRBUF_INIT
;
1747 logfile
= git_path("logs/%s", ref
);
1748 logfp
= fopen(logfile
, "r");
1753 struct stat statbuf
;
1754 if (fstat(fileno(logfp
), &statbuf
) ||
1755 statbuf
.st_size
< ofs
||
1756 fseek(logfp
, -ofs
, SEEK_END
) ||
1757 strbuf_getwholeline(&sb
, logfp
, '\n')) {
1759 strbuf_release(&sb
);
1764 while (!strbuf_getwholeline(&sb
, logfp
, '\n')) {
1765 unsigned char osha1
[20], nsha1
[20];
1766 char *email_end
, *message
;
1767 unsigned long timestamp
;
1770 /* old SP new SP name <email> SP time TAB msg LF */
1771 if (sb
.len
< 83 || sb
.buf
[sb
.len
- 1] != '\n' ||
1772 get_sha1_hex(sb
.buf
, osha1
) || sb
.buf
[40] != ' ' ||
1773 get_sha1_hex(sb
.buf
+ 41, nsha1
) || sb
.buf
[81] != ' ' ||
1774 !(email_end
= strchr(sb
.buf
+ 82, '>')) ||
1775 email_end
[1] != ' ' ||
1776 !(timestamp
= strtoul(email_end
+ 2, &message
, 10)) ||
1777 !message
|| message
[0] != ' ' ||
1778 (message
[1] != '+' && message
[1] != '-') ||
1779 !isdigit(message
[2]) || !isdigit(message
[3]) ||
1780 !isdigit(message
[4]) || !isdigit(message
[5]))
1781 continue; /* corrupt? */
1782 email_end
[1] = '\0';
1783 tz
= strtol(message
+ 1, NULL
, 10);
1784 if (message
[6] != '\t')
1788 ret
= fn(osha1
, nsha1
, sb
.buf
+ 82, timestamp
, tz
, message
,
1794 strbuf_release(&sb
);
1798 int for_each_reflog_ent(const char *ref
, each_reflog_ent_fn fn
, void *cb_data
)
1800 return for_each_recent_reflog_ent(ref
, fn
, 0, cb_data
);
1803 static int do_for_each_reflog(const char *base
, each_ref_fn fn
, void *cb_data
)
1805 DIR *dir
= opendir(git_path("logs/%s", base
));
1810 int baselen
= strlen(base
);
1811 char *log
= xmalloc(baselen
+ 257);
1813 memcpy(log
, base
, baselen
);
1814 if (baselen
&& base
[baselen
-1] != '/')
1815 log
[baselen
++] = '/';
1817 while ((de
= readdir(dir
)) != NULL
) {
1821 if (de
->d_name
[0] == '.')
1823 namelen
= strlen(de
->d_name
);
1826 if (has_extension(de
->d_name
, ".lock"))
1828 memcpy(log
+ baselen
, de
->d_name
, namelen
+1);
1829 if (stat(git_path("logs/%s", log
), &st
) < 0)
1831 if (S_ISDIR(st
.st_mode
)) {
1832 retval
= do_for_each_reflog(log
, fn
, cb_data
);
1834 unsigned char sha1
[20];
1835 if (!resolve_ref(log
, sha1
, 0, NULL
))
1836 retval
= error("bad ref for %s", log
);
1838 retval
= fn(log
, sha1
, 0, cb_data
);
1851 int for_each_reflog(each_ref_fn fn
, void *cb_data
)
1853 return do_for_each_reflog("", fn
, cb_data
);
1856 int update_ref(const char *action
, const char *refname
,
1857 const unsigned char *sha1
, const unsigned char *oldval
,
1858 int flags
, enum action_on_err onerr
)
1860 static struct ref_lock
*lock
;
1861 lock
= lock_any_ref_for_update(refname
, oldval
, flags
);
1863 const char *str
= "Cannot lock the ref '%s'.";
1865 case MSG_ON_ERR
: error(str
, refname
); break;
1866 case DIE_ON_ERR
: die(str
, refname
); break;
1867 case QUIET_ON_ERR
: break;
1871 if (write_ref_sha1(lock
, sha1
, action
) < 0) {
1872 const char *str
= "Cannot update the ref '%s'.";
1874 case MSG_ON_ERR
: error(str
, refname
); break;
1875 case DIE_ON_ERR
: die(str
, refname
); break;
1876 case QUIET_ON_ERR
: break;
1883 int ref_exists(const char *refname
)
1885 unsigned char sha1
[20];
1886 return !!resolve_ref(refname
, sha1
, 1, NULL
);
1889 struct ref
*find_ref_by_name(const struct ref
*list
, const char *name
)
1891 for ( ; list
; list
= list
->next
)
1892 if (!strcmp(list
->name
, name
))
1893 return (struct ref
*)list
;
1898 * generate a format suitable for scanf from a ref_rev_parse_rules
1899 * rule, that is replace the "%.*s" spec with a "%s" spec
1901 static void gen_scanf_fmt(char *scanf_fmt
, const char *rule
)
1905 spec
= strstr(rule
, "%.*s");
1906 if (!spec
|| strstr(spec
+ 4, "%.*s"))
1907 die("invalid rule in ref_rev_parse_rules: %s", rule
);
1909 /* copy all until spec */
1910 strncpy(scanf_fmt
, rule
, spec
- rule
);
1911 scanf_fmt
[spec
- rule
] = '\0';
1913 strcat(scanf_fmt
, "%s");
1914 /* copy remaining rule */
1915 strcat(scanf_fmt
, spec
+ 4);
1920 char *shorten_unambiguous_ref(const char *ref
, int strict
)
1923 static char **scanf_fmts
;
1924 static int nr_rules
;
1927 /* pre generate scanf formats from ref_rev_parse_rules[] */
1929 size_t total_len
= 0;
1931 /* the rule list is NULL terminated, count them first */
1932 for (; ref_rev_parse_rules
[nr_rules
]; nr_rules
++)
1933 /* no +1 because strlen("%s") < strlen("%.*s") */
1934 total_len
+= strlen(ref_rev_parse_rules
[nr_rules
]);
1936 scanf_fmts
= xmalloc(nr_rules
* sizeof(char *) + total_len
);
1939 for (i
= 0; i
< nr_rules
; i
++) {
1940 scanf_fmts
[i
] = (char *)&scanf_fmts
[nr_rules
]
1942 gen_scanf_fmt(scanf_fmts
[i
], ref_rev_parse_rules
[i
]);
1943 total_len
+= strlen(ref_rev_parse_rules
[i
]);
1947 /* bail out if there are no rules */
1949 return xstrdup(ref
);
1951 /* buffer for scanf result, at most ref must fit */
1952 short_name
= xstrdup(ref
);
1954 /* skip first rule, it will always match */
1955 for (i
= nr_rules
- 1; i
> 0 ; --i
) {
1957 int rules_to_fail
= i
;
1960 if (1 != sscanf(ref
, scanf_fmts
[i
], short_name
))
1963 short_name_len
= strlen(short_name
);
1966 * in strict mode, all (except the matched one) rules
1967 * must fail to resolve to a valid non-ambiguous ref
1970 rules_to_fail
= nr_rules
;
1973 * check if the short name resolves to a valid ref,
1974 * but use only rules prior to the matched one
1976 for (j
= 0; j
< rules_to_fail
; j
++) {
1977 const char *rule
= ref_rev_parse_rules
[j
];
1978 unsigned char short_objectname
[20];
1979 char refname
[PATH_MAX
];
1981 /* skip matched rule */
1986 * the short name is ambiguous, if it resolves
1987 * (with this previous rule) to a valid ref
1988 * read_ref() returns 0 on success
1990 mksnpath(refname
, sizeof(refname
),
1991 rule
, short_name_len
, short_name
);
1992 if (!read_ref(refname
, short_objectname
))
1997 * short name is non-ambiguous if all previous rules
1998 * haven't resolved to a valid ref
2000 if (j
== rules_to_fail
)
2005 return xstrdup(ref
);