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_packed_ref_cache(struct ref_cache
*refs
)
163 if (refs
->did_packed
)
164 free_ref_array(&refs
->packed
);
165 refs
->did_packed
= 0;
168 static void clear_loose_ref_cache(struct ref_cache
*refs
)
171 free_ref_array(&refs
->loose
);
175 static struct ref_cache
*create_ref_cache(const char *submodule
)
178 struct ref_cache
*refs
;
181 len
= strlen(submodule
) + 1;
182 refs
= xcalloc(1, sizeof(struct ref_cache
) + len
);
183 memcpy(refs
->name
, submodule
, len
);
188 * Return a pointer to a ref_cache for the specified submodule. For
189 * the main repository, use submodule==NULL. The returned structure
190 * will be allocated and initialized but not necessarily populated; it
191 * should not be freed.
193 static struct ref_cache
*get_ref_cache(const char *submodule
)
195 struct ref_cache
*refs
= ref_cache
;
199 if (!strcmp(submodule
, refs
->name
))
204 refs
= create_ref_cache(submodule
);
205 refs
->next
= ref_cache
;
210 void invalidate_ref_cache(const char *submodule
)
212 struct ref_cache
*refs
= get_ref_cache(submodule
);
213 clear_packed_ref_cache(refs
);
214 clear_loose_ref_cache(refs
);
217 static void read_packed_refs(FILE *f
, struct ref_array
*array
)
219 struct ref_entry
*last
= NULL
;
220 char refline
[PATH_MAX
];
221 int flag
= REF_ISPACKED
;
223 while (fgets(refline
, sizeof(refline
), f
)) {
224 unsigned char sha1
[20];
226 static const char header
[] = "# pack-refs with:";
228 if (!strncmp(refline
, header
, sizeof(header
)-1)) {
229 const char *traits
= refline
+ sizeof(header
) - 1;
230 if (strstr(traits
, " peeled "))
231 flag
|= REF_KNOWS_PEELED
;
232 /* perhaps other traits later as well */
236 name
= parse_ref_line(refline
, sha1
);
238 add_ref(name
, sha1
, flag
, array
, &last
);
243 strlen(refline
) == 42 &&
244 refline
[41] == '\n' &&
245 !get_sha1_hex(refline
+ 1, sha1
))
246 hashcpy(last
->peeled
, sha1
);
248 sort_ref_array(array
);
251 void add_extra_ref(const char *name
, const unsigned char *sha1
, int flag
)
253 add_ref(name
, sha1
, flag
, &extra_refs
, NULL
);
256 void clear_extra_refs(void)
258 free_ref_array(&extra_refs
);
261 static struct ref_array
*get_packed_refs(const char *submodule
)
263 struct ref_cache
*refs
= get_ref_cache(submodule
);
265 if (!refs
->did_packed
) {
266 const char *packed_refs_file
;
270 packed_refs_file
= git_path_submodule(submodule
, "packed-refs");
272 packed_refs_file
= git_path("packed-refs");
273 f
= fopen(packed_refs_file
, "r");
275 read_packed_refs(f
, &refs
->packed
);
278 refs
->did_packed
= 1;
280 return &refs
->packed
;
283 static void get_ref_dir(const char *submodule
, const char *base
,
284 struct ref_array
*array
)
290 path
= git_path_submodule(submodule
, "%s", base
);
292 path
= git_path("%s", base
);
299 int baselen
= strlen(base
);
300 char *ref
= xmalloc(baselen
+ 257);
302 memcpy(ref
, base
, baselen
);
303 if (baselen
&& base
[baselen
-1] != '/')
304 ref
[baselen
++] = '/';
306 while ((de
= readdir(dir
)) != NULL
) {
307 unsigned char sha1
[20];
313 if (de
->d_name
[0] == '.')
315 namelen
= strlen(de
->d_name
);
318 if (has_extension(de
->d_name
, ".lock"))
320 memcpy(ref
+ baselen
, de
->d_name
, namelen
+1);
322 ? git_path_submodule(submodule
, "%s", ref
)
323 : git_path("%s", ref
);
324 if (stat(refdir
, &st
) < 0)
326 if (S_ISDIR(st
.st_mode
)) {
327 get_ref_dir(submodule
, ref
, array
);
333 if (resolve_gitlink_ref(submodule
, ref
, sha1
) < 0) {
338 if (!resolve_ref(ref
, sha1
, 1, &flag
)) {
342 add_ref(ref
, sha1
, flag
, array
, NULL
);
349 struct warn_if_dangling_data
{
355 static int warn_if_dangling_symref(const char *refname
, const unsigned char *sha1
,
356 int flags
, void *cb_data
)
358 struct warn_if_dangling_data
*d
= cb_data
;
359 const char *resolves_to
;
360 unsigned char junk
[20];
362 if (!(flags
& REF_ISSYMREF
))
365 resolves_to
= resolve_ref(refname
, junk
, 0, NULL
);
366 if (!resolves_to
|| strcmp(resolves_to
, d
->refname
))
369 fprintf(d
->fp
, d
->msg_fmt
, refname
);
373 void warn_dangling_symref(FILE *fp
, const char *msg_fmt
, const char *refname
)
375 struct warn_if_dangling_data data
;
378 data
.refname
= refname
;
379 data
.msg_fmt
= msg_fmt
;
380 for_each_rawref(warn_if_dangling_symref
, &data
);
383 static struct ref_array
*get_loose_refs(const char *submodule
)
385 struct ref_cache
*refs
= get_ref_cache(submodule
);
387 if (!refs
->did_loose
) {
388 get_ref_dir(submodule
, "refs", &refs
->loose
);
389 sort_ref_array(&refs
->loose
);
395 /* We allow "recursive" symbolic refs. Only within reason, though */
397 #define MAXREFLEN (1024)
400 * Called by resolve_gitlink_ref_recursive() after it failed to read
401 * from "name", which is "module/.git/<refname>". Find <refname> in
402 * the packed-refs file for the submodule.
404 static int resolve_gitlink_packed_ref(char *name
, int pathlen
, const char *refname
, unsigned char *result
)
407 struct ref_entry
*ref
;
408 struct ref_array
*array
;
410 /* being defensive: resolve_gitlink_ref() did this for us */
411 if (pathlen
< 6 || memcmp(name
+ pathlen
- 6, "/.git/", 6))
413 name
[pathlen
- 6] = '\0'; /* make it path to the submodule */
414 array
= get_packed_refs(name
);
415 ref
= search_ref_array(array
, refname
);
417 memcpy(result
, ref
->sha1
, 20);
423 static int resolve_gitlink_ref_recursive(char *name
, int pathlen
, const char *refname
, unsigned char *result
, int recursion
)
425 int fd
, len
= strlen(refname
);
426 char buffer
[128], *p
;
428 if (recursion
> MAXDEPTH
|| len
> MAXREFLEN
)
430 memcpy(name
+ pathlen
, refname
, len
+1);
431 fd
= open(name
, O_RDONLY
);
433 return resolve_gitlink_packed_ref(name
, pathlen
, refname
, result
);
435 len
= read(fd
, buffer
, sizeof(buffer
)-1);
439 while (len
&& isspace(buffer
[len
-1]))
443 /* Was it a detached head or an old-fashioned symlink? */
444 if (!get_sha1_hex(buffer
, result
))
448 if (strncmp(buffer
, "ref:", 4))
454 return resolve_gitlink_ref_recursive(name
, pathlen
, p
, result
, recursion
+1);
457 int resolve_gitlink_ref(const char *path
, const char *refname
, unsigned char *result
)
459 int len
= strlen(path
), retval
;
463 while (len
&& path
[len
-1] == '/')
467 gitdir
= xmalloc(len
+ MAXREFLEN
+ 8);
468 memcpy(gitdir
, path
, len
);
469 memcpy(gitdir
+ len
, "/.git", 6);
472 tmp
= read_gitfile(gitdir
);
476 gitdir
= xmalloc(len
+ MAXREFLEN
+ 3);
477 memcpy(gitdir
, tmp
, len
);
480 gitdir
[++len
] = '\0';
481 retval
= resolve_gitlink_ref_recursive(gitdir
, len
, refname
, result
, 0);
487 * Try to read ref from the packed references. On success, set sha1
488 * and return 0; otherwise, return -1.
490 static int get_packed_ref(const char *ref
, unsigned char *sha1
)
492 struct ref_array
*packed
= get_packed_refs(NULL
);
493 struct ref_entry
*entry
= search_ref_array(packed
, ref
);
495 hashcpy(sha1
, entry
->sha1
);
501 const char *resolve_ref(const char *ref
, unsigned char *sha1
, int reading
, int *flag
)
503 int depth
= MAXDEPTH
;
506 static char ref_buffer
[256];
512 if (check_refname_format(ref
, REFNAME_ALLOW_ONELEVEL
))
523 git_snpath(path
, sizeof(path
), "%s", ref
);
525 if (lstat(path
, &st
) < 0) {
529 * The loose reference file does not exist;
530 * check for a packed reference.
532 if (!get_packed_ref(ref
, sha1
)) {
534 *flag
|= REF_ISPACKED
;
537 /* The reference is not a packed reference, either. */
546 /* Follow "normalized" - ie "refs/.." symlinks by hand */
547 if (S_ISLNK(st
.st_mode
)) {
548 len
= readlink(path
, buffer
, sizeof(buffer
)-1);
552 if (!prefixcmp(buffer
, "refs/") &&
553 !check_refname_format(buffer
, 0)) {
554 strcpy(ref_buffer
, buffer
);
557 *flag
|= REF_ISSYMREF
;
562 /* Is it a directory? */
563 if (S_ISDIR(st
.st_mode
)) {
569 * Anything else, just open it and try to use it as
572 fd
= open(path
, O_RDONLY
);
575 len
= read_in_full(fd
, buffer
, sizeof(buffer
)-1);
579 while (len
&& isspace(buffer
[len
-1]))
584 * Is it a symbolic ref?
586 if (prefixcmp(buffer
, "ref:"))
589 while (isspace(*buf
))
591 if (check_refname_format(buf
, REFNAME_ALLOW_ONELEVEL
)) {
592 warning("symbolic reference in %s is formatted incorrectly",
596 ref
= strcpy(ref_buffer
, buf
);
598 *flag
|= REF_ISSYMREF
;
600 /* Please note that FETCH_HEAD has a second line containing other data. */
601 if (get_sha1_hex(buffer
, sha1
) || (buffer
[40] != '\0' && !isspace(buffer
[40]))) {
602 warning("reference in %s is formatted incorrectly", path
);
608 /* The argument to filter_refs */
615 int read_ref(const char *ref
, unsigned char *sha1
)
617 if (resolve_ref(ref
, sha1
, 1, NULL
))
622 #define DO_FOR_EACH_INCLUDE_BROKEN 01
623 static int do_one_ref(const char *base
, each_ref_fn fn
, int trim
,
624 int flags
, void *cb_data
, struct ref_entry
*entry
)
626 if (prefixcmp(entry
->name
, base
))
629 if (!(flags
& DO_FOR_EACH_INCLUDE_BROKEN
)) {
630 if (entry
->flag
& REF_BROKEN
)
631 return 0; /* ignore dangling symref */
632 if (!has_sha1_file(entry
->sha1
)) {
633 error("%s does not point to a valid object!", entry
->name
);
638 return fn(entry
->name
+ trim
, entry
->sha1
, entry
->flag
, cb_data
);
641 static int filter_refs(const char *ref
, const unsigned char *sha
, int flags
,
644 struct ref_filter
*filter
= (struct ref_filter
*)data
;
645 if (fnmatch(filter
->pattern
, ref
, 0))
647 return filter
->fn(ref
, sha
, flags
, filter
->cb_data
);
650 int peel_ref(const char *ref
, unsigned char *sha1
)
653 unsigned char base
[20];
656 if (current_ref
&& (current_ref
->name
== ref
657 || !strcmp(current_ref
->name
, ref
))) {
658 if (current_ref
->flag
& REF_KNOWS_PEELED
) {
659 hashcpy(sha1
, current_ref
->peeled
);
662 hashcpy(base
, current_ref
->sha1
);
666 if (!resolve_ref(ref
, base
, 1, &flag
))
669 if ((flag
& REF_ISPACKED
)) {
670 struct ref_array
*array
= get_packed_refs(NULL
);
671 struct ref_entry
*r
= search_ref_array(array
, ref
);
673 if (r
!= NULL
&& r
->flag
& REF_KNOWS_PEELED
) {
674 hashcpy(sha1
, r
->peeled
);
680 o
= parse_object(base
);
681 if (o
&& o
->type
== OBJ_TAG
) {
682 o
= deref_tag(o
, ref
, 0);
684 hashcpy(sha1
, o
->sha1
);
691 static int do_for_each_ref(const char *submodule
, const char *base
, each_ref_fn fn
,
692 int trim
, int flags
, void *cb_data
)
694 int retval
= 0, i
, p
= 0, l
= 0;
695 struct ref_array
*packed
= get_packed_refs(submodule
);
696 struct ref_array
*loose
= get_loose_refs(submodule
);
698 struct ref_array
*extra
= &extra_refs
;
700 for (i
= 0; i
< extra
->nr
; i
++)
701 retval
= do_one_ref(base
, fn
, trim
, flags
, cb_data
, extra
->refs
[i
]);
703 while (p
< packed
->nr
&& l
< loose
->nr
) {
704 struct ref_entry
*entry
;
705 int cmp
= strcmp(packed
->refs
[p
]->name
, loose
->refs
[l
]->name
);
711 entry
= loose
->refs
[l
++];
713 entry
= packed
->refs
[p
++];
715 retval
= do_one_ref(base
, fn
, trim
, flags
, cb_data
, entry
);
725 for (; p
< packed
->nr
; p
++) {
726 retval
= do_one_ref(base
, fn
, trim
, flags
, cb_data
, packed
->refs
[p
]);
737 static int do_head_ref(const char *submodule
, each_ref_fn fn
, void *cb_data
)
739 unsigned char sha1
[20];
743 if (resolve_gitlink_ref(submodule
, "HEAD", sha1
) == 0)
744 return fn("HEAD", sha1
, 0, cb_data
);
749 if (resolve_ref("HEAD", sha1
, 1, &flag
))
750 return fn("HEAD", sha1
, flag
, cb_data
);
755 int head_ref(each_ref_fn fn
, void *cb_data
)
757 return do_head_ref(NULL
, fn
, cb_data
);
760 int head_ref_submodule(const char *submodule
, each_ref_fn fn
, void *cb_data
)
762 return do_head_ref(submodule
, fn
, cb_data
);
765 int for_each_ref(each_ref_fn fn
, void *cb_data
)
767 return do_for_each_ref(NULL
, "", fn
, 0, 0, cb_data
);
770 int for_each_ref_submodule(const char *submodule
, each_ref_fn fn
, void *cb_data
)
772 return do_for_each_ref(submodule
, "", fn
, 0, 0, cb_data
);
775 int for_each_ref_in(const char *prefix
, each_ref_fn fn
, void *cb_data
)
777 return do_for_each_ref(NULL
, prefix
, fn
, strlen(prefix
), 0, cb_data
);
780 int for_each_ref_in_submodule(const char *submodule
, const char *prefix
,
781 each_ref_fn fn
, void *cb_data
)
783 return do_for_each_ref(submodule
, prefix
, fn
, strlen(prefix
), 0, cb_data
);
786 int for_each_tag_ref(each_ref_fn fn
, void *cb_data
)
788 return for_each_ref_in("refs/tags/", fn
, cb_data
);
791 int for_each_tag_ref_submodule(const char *submodule
, each_ref_fn fn
, void *cb_data
)
793 return for_each_ref_in_submodule(submodule
, "refs/tags/", fn
, cb_data
);
796 int for_each_branch_ref(each_ref_fn fn
, void *cb_data
)
798 return for_each_ref_in("refs/heads/", fn
, cb_data
);
801 int for_each_branch_ref_submodule(const char *submodule
, each_ref_fn fn
, void *cb_data
)
803 return for_each_ref_in_submodule(submodule
, "refs/heads/", fn
, cb_data
);
806 int for_each_remote_ref(each_ref_fn fn
, void *cb_data
)
808 return for_each_ref_in("refs/remotes/", fn
, cb_data
);
811 int for_each_remote_ref_submodule(const char *submodule
, each_ref_fn fn
, void *cb_data
)
813 return for_each_ref_in_submodule(submodule
, "refs/remotes/", fn
, cb_data
);
816 int for_each_replace_ref(each_ref_fn fn
, void *cb_data
)
818 return do_for_each_ref(NULL
, "refs/replace/", fn
, 13, 0, cb_data
);
821 int head_ref_namespaced(each_ref_fn fn
, void *cb_data
)
823 struct strbuf buf
= STRBUF_INIT
;
825 unsigned char sha1
[20];
828 strbuf_addf(&buf
, "%sHEAD", get_git_namespace());
829 if (resolve_ref(buf
.buf
, sha1
, 1, &flag
))
830 ret
= fn(buf
.buf
, sha1
, flag
, cb_data
);
831 strbuf_release(&buf
);
836 int for_each_namespaced_ref(each_ref_fn fn
, void *cb_data
)
838 struct strbuf buf
= STRBUF_INIT
;
840 strbuf_addf(&buf
, "%srefs/", get_git_namespace());
841 ret
= do_for_each_ref(NULL
, buf
.buf
, fn
, 0, 0, cb_data
);
842 strbuf_release(&buf
);
846 int for_each_glob_ref_in(each_ref_fn fn
, const char *pattern
,
847 const char *prefix
, void *cb_data
)
849 struct strbuf real_pattern
= STRBUF_INIT
;
850 struct ref_filter filter
;
853 if (!prefix
&& prefixcmp(pattern
, "refs/"))
854 strbuf_addstr(&real_pattern
, "refs/");
856 strbuf_addstr(&real_pattern
, prefix
);
857 strbuf_addstr(&real_pattern
, pattern
);
859 if (!has_glob_specials(pattern
)) {
860 /* Append implied '/' '*' if not present. */
861 if (real_pattern
.buf
[real_pattern
.len
- 1] != '/')
862 strbuf_addch(&real_pattern
, '/');
863 /* No need to check for '*', there is none. */
864 strbuf_addch(&real_pattern
, '*');
867 filter
.pattern
= real_pattern
.buf
;
869 filter
.cb_data
= cb_data
;
870 ret
= for_each_ref(filter_refs
, &filter
);
872 strbuf_release(&real_pattern
);
876 int for_each_glob_ref(each_ref_fn fn
, const char *pattern
, void *cb_data
)
878 return for_each_glob_ref_in(fn
, pattern
, NULL
, cb_data
);
881 int for_each_rawref(each_ref_fn fn
, void *cb_data
)
883 return do_for_each_ref(NULL
, "", fn
, 0,
884 DO_FOR_EACH_INCLUDE_BROKEN
, cb_data
);
888 * Make sure "ref" is something reasonable to have under ".git/refs/";
889 * We do not like it if:
891 * - any path component of it begins with ".", or
892 * - it has double dots "..", or
893 * - it has ASCII control character, "~", "^", ":" or SP, anywhere, or
894 * - it ends with a "/".
895 * - it ends with ".lock"
896 * - it contains a "\" (backslash)
899 /* Return true iff ch is not allowed in reference names. */
900 static inline int bad_ref_char(int ch
)
902 if (((unsigned) ch
) <= ' ' || ch
== 0x7f ||
903 ch
== '~' || ch
== '^' || ch
== ':' || ch
== '\\')
905 /* 2.13 Pattern Matching Notation */
906 if (ch
== '*' || ch
== '?' || ch
== '[') /* Unsupported */
912 * Try to read one refname component from the front of ref. Return
913 * the length of the component found, or -1 if the component is not
916 static int check_refname_component(const char *ref
, int flags
)
921 for (cp
= ref
; ; cp
++) {
923 if (ch
== '\0' || ch
== '/')
925 if (bad_ref_char(ch
))
926 return -1; /* Illegal character in refname. */
927 if (last
== '.' && ch
== '.')
928 return -1; /* Refname contains "..". */
929 if (last
== '@' && ch
== '{')
930 return -1; /* Refname contains "@{". */
934 return -1; /* Component has zero length. */
936 if (!(flags
& REFNAME_DOT_COMPONENT
))
937 return -1; /* Component starts with '.'. */
939 * Even if leading dots are allowed, don't allow "."
940 * as a component (".." is prevented by a rule above).
943 return -1; /* Component equals ".". */
945 if (cp
- ref
>= 5 && !memcmp(cp
- 5, ".lock", 5))
946 return -1; /* Refname ends with ".lock". */
950 int check_refname_format(const char *ref
, int flags
)
952 int component_len
, component_count
= 0;
955 /* We are at the start of a path component. */
956 component_len
= check_refname_component(ref
, flags
);
957 if (component_len
< 0) {
958 if ((flags
& REFNAME_REFSPEC_PATTERN
) &&
960 (ref
[1] == '\0' || ref
[1] == '/')) {
961 /* Accept one wildcard as a full refname component. */
962 flags
&= ~REFNAME_REFSPEC_PATTERN
;
969 if (ref
[component_len
] == '\0')
971 /* Skip to next component. */
972 ref
+= component_len
+ 1;
975 if (ref
[component_len
- 1] == '.')
976 return -1; /* Refname ends with '.'. */
977 if (!(flags
& REFNAME_ALLOW_ONELEVEL
) && component_count
< 2)
978 return -1; /* Refname has only one component. */
982 const char *prettify_refname(const char *name
)
985 !prefixcmp(name
, "refs/heads/") ? 11 :
986 !prefixcmp(name
, "refs/tags/") ? 10 :
987 !prefixcmp(name
, "refs/remotes/") ? 13 :
991 const char *ref_rev_parse_rules
[] = {
997 "refs/remotes/%.*s/HEAD",
1001 const char *ref_fetch_rules
[] = {
1008 int refname_match(const char *abbrev_name
, const char *full_name
, const char **rules
)
1011 const int abbrev_name_len
= strlen(abbrev_name
);
1013 for (p
= rules
; *p
; p
++) {
1014 if (!strcmp(full_name
, mkpath(*p
, abbrev_name_len
, abbrev_name
))) {
1022 static struct ref_lock
*verify_lock(struct ref_lock
*lock
,
1023 const unsigned char *old_sha1
, int mustexist
)
1025 if (!resolve_ref(lock
->ref_name
, lock
->old_sha1
, mustexist
, NULL
)) {
1026 error("Can't verify ref %s", lock
->ref_name
);
1030 if (hashcmp(lock
->old_sha1
, old_sha1
)) {
1031 error("Ref %s is at %s but expected %s", lock
->ref_name
,
1032 sha1_to_hex(lock
->old_sha1
), sha1_to_hex(old_sha1
));
1039 static int remove_empty_directories(const char *file
)
1041 /* we want to create a file but there is a directory there;
1042 * if that is an empty directory (or a directory that contains
1043 * only empty directories), remove them.
1048 strbuf_init(&path
, 20);
1049 strbuf_addstr(&path
, file
);
1051 result
= remove_dir_recursively(&path
, REMOVE_DIR_EMPTY_ONLY
);
1053 strbuf_release(&path
);
1058 static int is_refname_available(const char *ref
, const char *oldref
,
1059 struct ref_array
*array
, int quiet
)
1061 int i
, namlen
= strlen(ref
); /* e.g. 'foo/bar' */
1062 for (i
= 0; i
< array
->nr
; i
++ ) {
1063 struct ref_entry
*entry
= array
->refs
[i
];
1064 /* entry->name could be 'foo' or 'foo/bar/baz' */
1065 if (!oldref
|| strcmp(oldref
, entry
->name
)) {
1066 int len
= strlen(entry
->name
);
1067 int cmplen
= (namlen
< len
) ? namlen
: len
;
1068 const char *lead
= (namlen
< len
) ? entry
->name
: ref
;
1069 if (!strncmp(ref
, entry
->name
, cmplen
) &&
1070 lead
[cmplen
] == '/') {
1072 error("'%s' exists; cannot create '%s'",
1081 static struct ref_lock
*lock_ref_sha1_basic(const char *ref
, const unsigned char *old_sha1
, int flags
, int *type_p
)
1084 const char *orig_ref
= ref
;
1085 struct ref_lock
*lock
;
1088 int mustexist
= (old_sha1
&& !is_null_sha1(old_sha1
));
1091 lock
= xcalloc(1, sizeof(struct ref_lock
));
1094 ref
= resolve_ref(ref
, lock
->old_sha1
, mustexist
, &type
);
1095 if (!ref
&& errno
== EISDIR
) {
1096 /* we are trying to lock foo but we used to
1097 * have foo/bar which now does not exist;
1098 * it is normal for the empty directory 'foo'
1101 ref_file
= git_path("%s", orig_ref
);
1102 if (remove_empty_directories(ref_file
)) {
1104 error("there are still refs under '%s'", orig_ref
);
1107 ref
= resolve_ref(orig_ref
, lock
->old_sha1
, mustexist
, &type
);
1113 error("unable to resolve reference %s: %s",
1114 orig_ref
, strerror(errno
));
1117 missing
= is_null_sha1(lock
->old_sha1
);
1118 /* When the ref did not exist and we are creating it,
1119 * make sure there is no existing ref that is packed
1120 * whose name begins with our refname, nor a ref whose
1121 * name is a proper prefix of our refname.
1124 !is_refname_available(ref
, NULL
, get_packed_refs(NULL
), 0)) {
1125 last_errno
= ENOTDIR
;
1129 lock
->lk
= xcalloc(1, sizeof(struct lock_file
));
1131 lflags
= LOCK_DIE_ON_ERROR
;
1132 if (flags
& REF_NODEREF
) {
1134 lflags
|= LOCK_NODEREF
;
1136 lock
->ref_name
= xstrdup(ref
);
1137 lock
->orig_ref_name
= xstrdup(orig_ref
);
1138 ref_file
= git_path("%s", ref
);
1140 lock
->force_write
= 1;
1141 if ((flags
& REF_NODEREF
) && (type
& REF_ISSYMREF
))
1142 lock
->force_write
= 1;
1144 if (safe_create_leading_directories(ref_file
)) {
1146 error("unable to create directory for %s", ref_file
);
1150 lock
->lock_fd
= hold_lock_file_for_update(lock
->lk
, ref_file
, lflags
);
1151 return old_sha1
? verify_lock(lock
, old_sha1
, mustexist
) : lock
;
1159 struct ref_lock
*lock_ref_sha1(const char *ref
, const unsigned char *old_sha1
)
1161 char refpath
[PATH_MAX
];
1162 if (check_refname_format(ref
, 0))
1164 strcpy(refpath
, mkpath("refs/%s", ref
));
1165 return lock_ref_sha1_basic(refpath
, old_sha1
, 0, NULL
);
1168 struct ref_lock
*lock_any_ref_for_update(const char *ref
, const unsigned char *old_sha1
, int flags
)
1170 if (check_refname_format(ref
, REFNAME_ALLOW_ONELEVEL
))
1172 return lock_ref_sha1_basic(ref
, old_sha1
, flags
, NULL
);
1175 static struct lock_file packlock
;
1177 static int repack_without_ref(const char *refname
)
1179 struct ref_array
*packed
;
1180 struct ref_entry
*ref
;
1183 packed
= get_packed_refs(NULL
);
1184 ref
= search_ref_array(packed
, refname
);
1187 fd
= hold_lock_file_for_update(&packlock
, git_path("packed-refs"), 0);
1189 unable_to_lock_error(git_path("packed-refs"), errno
);
1190 return error("cannot delete '%s' from packed refs", refname
);
1193 for (i
= 0; i
< packed
->nr
; i
++) {
1194 char line
[PATH_MAX
+ 100];
1197 ref
= packed
->refs
[i
];
1199 if (!strcmp(refname
, ref
->name
))
1201 len
= snprintf(line
, sizeof(line
), "%s %s\n",
1202 sha1_to_hex(ref
->sha1
), ref
->name
);
1203 /* this should not happen but just being defensive */
1204 if (len
> sizeof(line
))
1205 die("too long a refname '%s'", ref
->name
);
1206 write_or_die(fd
, line
, len
);
1208 return commit_lock_file(&packlock
);
1211 int delete_ref(const char *refname
, const unsigned char *sha1
, int delopt
)
1213 struct ref_lock
*lock
;
1214 int err
, i
= 0, ret
= 0, flag
= 0;
1216 lock
= lock_ref_sha1_basic(refname
, sha1
, 0, &flag
);
1219 if (!(flag
& REF_ISPACKED
) || flag
& REF_ISSYMREF
) {
1223 if (!(delopt
& REF_NODEREF
)) {
1224 i
= strlen(lock
->lk
->filename
) - 5; /* .lock */
1225 lock
->lk
->filename
[i
] = 0;
1226 path
= lock
->lk
->filename
;
1228 path
= git_path("%s", refname
);
1230 err
= unlink_or_warn(path
);
1231 if (err
&& errno
!= ENOENT
)
1234 if (!(delopt
& REF_NODEREF
))
1235 lock
->lk
->filename
[i
] = '.';
1237 /* removing the loose one could have resurrected an earlier
1238 * packed one. Also, if it was not loose we need to repack
1241 ret
|= repack_without_ref(refname
);
1243 unlink_or_warn(git_path("logs/%s", lock
->ref_name
));
1244 invalidate_ref_cache(NULL
);
1250 * People using contrib's git-new-workdir have .git/logs/refs ->
1251 * /some/other/path/.git/logs/refs, and that may live on another device.
1253 * IOW, to avoid cross device rename errors, the temporary renamed log must
1254 * live into logs/refs.
1256 #define TMP_RENAMED_LOG "logs/refs/.tmp-renamed-log"
1258 int rename_ref(const char *oldref
, const char *newref
, const char *logmsg
)
1260 unsigned char sha1
[20], orig_sha1
[20];
1261 int flag
= 0, logmoved
= 0;
1262 struct ref_lock
*lock
;
1263 struct stat loginfo
;
1264 int log
= !lstat(git_path("logs/%s", oldref
), &loginfo
);
1265 const char *symref
= NULL
;
1267 if (log
&& S_ISLNK(loginfo
.st_mode
))
1268 return error("reflog for %s is a symlink", oldref
);
1270 symref
= resolve_ref(oldref
, orig_sha1
, 1, &flag
);
1271 if (flag
& REF_ISSYMREF
)
1272 return error("refname %s is a symbolic ref, renaming it is not supported",
1275 return error("refname %s not found", oldref
);
1277 if (!is_refname_available(newref
, oldref
, get_packed_refs(NULL
), 0))
1280 if (!is_refname_available(newref
, oldref
, get_loose_refs(NULL
), 0))
1283 if (log
&& rename(git_path("logs/%s", oldref
), git_path(TMP_RENAMED_LOG
)))
1284 return error("unable to move logfile logs/%s to "TMP_RENAMED_LOG
": %s",
1285 oldref
, strerror(errno
));
1287 if (delete_ref(oldref
, orig_sha1
, REF_NODEREF
)) {
1288 error("unable to delete old %s", oldref
);
1292 if (resolve_ref(newref
, sha1
, 1, &flag
) && delete_ref(newref
, sha1
, REF_NODEREF
)) {
1293 if (errno
==EISDIR
) {
1294 if (remove_empty_directories(git_path("%s", newref
))) {
1295 error("Directory not empty: %s", newref
);
1299 error("unable to delete existing %s", newref
);
1304 if (log
&& safe_create_leading_directories(git_path("logs/%s", newref
))) {
1305 error("unable to create directory for %s", newref
);
1310 if (log
&& rename(git_path(TMP_RENAMED_LOG
), git_path("logs/%s", newref
))) {
1311 if (errno
==EISDIR
|| errno
==ENOTDIR
) {
1313 * rename(a, b) when b is an existing
1314 * directory ought to result in ISDIR, but
1315 * Solaris 5.8 gives ENOTDIR. Sheesh.
1317 if (remove_empty_directories(git_path("logs/%s", newref
))) {
1318 error("Directory not empty: logs/%s", newref
);
1323 error("unable to move logfile "TMP_RENAMED_LOG
" to logs/%s: %s",
1324 newref
, strerror(errno
));
1330 lock
= lock_ref_sha1_basic(newref
, NULL
, 0, NULL
);
1332 error("unable to lock %s for update", newref
);
1335 lock
->force_write
= 1;
1336 hashcpy(lock
->old_sha1
, orig_sha1
);
1337 if (write_ref_sha1(lock
, orig_sha1
, logmsg
)) {
1338 error("unable to write current sha1 into %s", newref
);
1345 lock
= lock_ref_sha1_basic(oldref
, NULL
, 0, NULL
);
1347 error("unable to lock %s for rollback", oldref
);
1351 lock
->force_write
= 1;
1352 flag
= log_all_ref_updates
;
1353 log_all_ref_updates
= 0;
1354 if (write_ref_sha1(lock
, orig_sha1
, NULL
))
1355 error("unable to write current sha1 into %s", oldref
);
1356 log_all_ref_updates
= flag
;
1359 if (logmoved
&& rename(git_path("logs/%s", newref
), git_path("logs/%s", oldref
)))
1360 error("unable to restore logfile %s from %s: %s",
1361 oldref
, newref
, strerror(errno
));
1362 if (!logmoved
&& log
&&
1363 rename(git_path(TMP_RENAMED_LOG
), git_path("logs/%s", oldref
)))
1364 error("unable to restore logfile %s from "TMP_RENAMED_LOG
": %s",
1365 oldref
, strerror(errno
));
1370 int close_ref(struct ref_lock
*lock
)
1372 if (close_lock_file(lock
->lk
))
1378 int commit_ref(struct ref_lock
*lock
)
1380 if (commit_lock_file(lock
->lk
))
1386 void unlock_ref(struct ref_lock
*lock
)
1388 /* Do not free lock->lk -- atexit() still looks at them */
1390 rollback_lock_file(lock
->lk
);
1391 free(lock
->ref_name
);
1392 free(lock
->orig_ref_name
);
1397 * copy the reflog message msg to buf, which has been allocated sufficiently
1398 * large, while cleaning up the whitespaces. Especially, convert LF to space,
1399 * because reflog file is one line per entry.
1401 static int copy_msg(char *buf
, const char *msg
)
1408 while ((c
= *msg
++)) {
1409 if (wasspace
&& isspace(c
))
1411 wasspace
= isspace(c
);
1416 while (buf
< cp
&& isspace(cp
[-1]))
1422 int log_ref_setup(const char *ref_name
, char *logfile
, int bufsize
)
1424 int logfd
, oflags
= O_APPEND
| O_WRONLY
;
1426 git_snpath(logfile
, bufsize
, "logs/%s", ref_name
);
1427 if (log_all_ref_updates
&&
1428 (!prefixcmp(ref_name
, "refs/heads/") ||
1429 !prefixcmp(ref_name
, "refs/remotes/") ||
1430 !prefixcmp(ref_name
, "refs/notes/") ||
1431 !strcmp(ref_name
, "HEAD"))) {
1432 if (safe_create_leading_directories(logfile
) < 0)
1433 return error("unable to create directory for %s",
1438 logfd
= open(logfile
, oflags
, 0666);
1440 if (!(oflags
& O_CREAT
) && errno
== ENOENT
)
1443 if ((oflags
& O_CREAT
) && errno
== EISDIR
) {
1444 if (remove_empty_directories(logfile
)) {
1445 return error("There are still logs under '%s'",
1448 logfd
= open(logfile
, oflags
, 0666);
1452 return error("Unable to append to %s: %s",
1453 logfile
, strerror(errno
));
1456 adjust_shared_perm(logfile
);
1461 static int log_ref_write(const char *ref_name
, const unsigned char *old_sha1
,
1462 const unsigned char *new_sha1
, const char *msg
)
1464 int logfd
, result
, written
, oflags
= O_APPEND
| O_WRONLY
;
1465 unsigned maxlen
, len
;
1467 char log_file
[PATH_MAX
];
1469 const char *committer
;
1471 if (log_all_ref_updates
< 0)
1472 log_all_ref_updates
= !is_bare_repository();
1474 result
= log_ref_setup(ref_name
, log_file
, sizeof(log_file
));
1478 logfd
= open(log_file
, oflags
);
1481 msglen
= msg
? strlen(msg
) : 0;
1482 committer
= git_committer_info(0);
1483 maxlen
= strlen(committer
) + msglen
+ 100;
1484 logrec
= xmalloc(maxlen
);
1485 len
= sprintf(logrec
, "%s %s %s\n",
1486 sha1_to_hex(old_sha1
),
1487 sha1_to_hex(new_sha1
),
1490 len
+= copy_msg(logrec
+ len
- 1, msg
) - 1;
1491 written
= len
<= maxlen
? write_in_full(logfd
, logrec
, len
) : -1;
1493 if (close(logfd
) != 0 || written
!= len
)
1494 return error("Unable to append to %s", log_file
);
1498 static int is_branch(const char *refname
)
1500 return !strcmp(refname
, "HEAD") || !prefixcmp(refname
, "refs/heads/");
1503 int write_ref_sha1(struct ref_lock
*lock
,
1504 const unsigned char *sha1
, const char *logmsg
)
1506 static char term
= '\n';
1511 if (!lock
->force_write
&& !hashcmp(lock
->old_sha1
, sha1
)) {
1515 o
= parse_object(sha1
);
1517 error("Trying to write ref %s with nonexistent object %s",
1518 lock
->ref_name
, sha1_to_hex(sha1
));
1522 if (o
->type
!= OBJ_COMMIT
&& is_branch(lock
->ref_name
)) {
1523 error("Trying to write non-commit object %s to branch %s",
1524 sha1_to_hex(sha1
), lock
->ref_name
);
1528 if (write_in_full(lock
->lock_fd
, sha1_to_hex(sha1
), 40) != 40 ||
1529 write_in_full(lock
->lock_fd
, &term
, 1) != 1
1530 || close_ref(lock
) < 0) {
1531 error("Couldn't write %s", lock
->lk
->filename
);
1535 clear_loose_ref_cache(get_ref_cache(NULL
));
1536 if (log_ref_write(lock
->ref_name
, lock
->old_sha1
, sha1
, logmsg
) < 0 ||
1537 (strcmp(lock
->ref_name
, lock
->orig_ref_name
) &&
1538 log_ref_write(lock
->orig_ref_name
, lock
->old_sha1
, sha1
, logmsg
) < 0)) {
1542 if (strcmp(lock
->orig_ref_name
, "HEAD") != 0) {
1544 * Special hack: If a branch is updated directly and HEAD
1545 * points to it (may happen on the remote side of a push
1546 * for example) then logically the HEAD reflog should be
1548 * A generic solution implies reverse symref information,
1549 * but finding all symrefs pointing to the given branch
1550 * would be rather costly for this rare event (the direct
1551 * update of a branch) to be worth it. So let's cheat and
1552 * check with HEAD only which should cover 99% of all usage
1553 * scenarios (even 100% of the default ones).
1555 unsigned char head_sha1
[20];
1557 const char *head_ref
;
1558 head_ref
= resolve_ref("HEAD", head_sha1
, 1, &head_flag
);
1559 if (head_ref
&& (head_flag
& REF_ISSYMREF
) &&
1560 !strcmp(head_ref
, lock
->ref_name
))
1561 log_ref_write("HEAD", lock
->old_sha1
, sha1
, logmsg
);
1563 if (commit_ref(lock
)) {
1564 error("Couldn't set %s", lock
->ref_name
);
1572 int create_symref(const char *ref_target
, const char *refs_heads_master
,
1575 const char *lockpath
;
1577 int fd
, len
, written
;
1578 char *git_HEAD
= git_pathdup("%s", ref_target
);
1579 unsigned char old_sha1
[20], new_sha1
[20];
1581 if (logmsg
&& read_ref(ref_target
, old_sha1
))
1584 if (safe_create_leading_directories(git_HEAD
) < 0)
1585 return error("unable to create directory for %s", git_HEAD
);
1587 #ifndef NO_SYMLINK_HEAD
1588 if (prefer_symlink_refs
) {
1590 if (!symlink(refs_heads_master
, git_HEAD
))
1592 fprintf(stderr
, "no symlink - falling back to symbolic ref\n");
1596 len
= snprintf(ref
, sizeof(ref
), "ref: %s\n", refs_heads_master
);
1597 if (sizeof(ref
) <= len
) {
1598 error("refname too long: %s", refs_heads_master
);
1599 goto error_free_return
;
1601 lockpath
= mkpath("%s.lock", git_HEAD
);
1602 fd
= open(lockpath
, O_CREAT
| O_EXCL
| O_WRONLY
, 0666);
1604 error("Unable to open %s for writing", lockpath
);
1605 goto error_free_return
;
1607 written
= write_in_full(fd
, ref
, len
);
1608 if (close(fd
) != 0 || written
!= len
) {
1609 error("Unable to write to %s", lockpath
);
1610 goto error_unlink_return
;
1612 if (rename(lockpath
, git_HEAD
) < 0) {
1613 error("Unable to create %s", git_HEAD
);
1614 goto error_unlink_return
;
1616 if (adjust_shared_perm(git_HEAD
)) {
1617 error("Unable to fix permissions on %s", lockpath
);
1618 error_unlink_return
:
1619 unlink_or_warn(lockpath
);
1625 #ifndef NO_SYMLINK_HEAD
1628 if (logmsg
&& !read_ref(refs_heads_master
, new_sha1
))
1629 log_ref_write(ref_target
, old_sha1
, new_sha1
, logmsg
);
1635 static char *ref_msg(const char *line
, const char *endp
)
1639 ep
= memchr(line
, '\n', endp
- line
);
1642 return xmemdupz(line
, ep
- line
);
1645 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
)
1647 const char *logfile
, *logdata
, *logend
, *rec
, *lastgt
, *lastrec
;
1649 int logfd
, tz
, reccnt
= 0;
1652 unsigned char logged_sha1
[20];
1656 logfile
= git_path("logs/%s", ref
);
1657 logfd
= open(logfile
, O_RDONLY
, 0);
1659 die_errno("Unable to read log '%s'", logfile
);
1662 die("Log %s is empty.", logfile
);
1663 mapsz
= xsize_t(st
.st_size
);
1664 log_mapped
= xmmap(NULL
, mapsz
, PROT_READ
, MAP_PRIVATE
, logfd
, 0);
1665 logdata
= log_mapped
;
1669 rec
= logend
= logdata
+ st
.st_size
;
1670 while (logdata
< rec
) {
1672 if (logdata
< rec
&& *(rec
-1) == '\n')
1675 while (logdata
< rec
&& *(rec
-1) != '\n') {
1681 die("Log %s is corrupt.", logfile
);
1682 date
= strtoul(lastgt
+ 1, &tz_c
, 10);
1683 if (date
<= at_time
|| cnt
== 0) {
1684 tz
= strtoul(tz_c
, NULL
, 10);
1686 *msg
= ref_msg(rec
, logend
);
1688 *cutoff_time
= date
;
1692 *cutoff_cnt
= reccnt
- 1;
1694 if (get_sha1_hex(lastrec
, logged_sha1
))
1695 die("Log %s is corrupt.", logfile
);
1696 if (get_sha1_hex(rec
+ 41, sha1
))
1697 die("Log %s is corrupt.", logfile
);
1698 if (hashcmp(logged_sha1
, sha1
)) {
1699 warning("Log %s has gap after %s.",
1700 logfile
, show_date(date
, tz
, DATE_RFC2822
));
1703 else if (date
== at_time
) {
1704 if (get_sha1_hex(rec
+ 41, sha1
))
1705 die("Log %s is corrupt.", logfile
);
1708 if (get_sha1_hex(rec
+ 41, logged_sha1
))
1709 die("Log %s is corrupt.", logfile
);
1710 if (hashcmp(logged_sha1
, sha1
)) {
1711 warning("Log %s unexpectedly ended on %s.",
1712 logfile
, show_date(date
, tz
, DATE_RFC2822
));
1715 munmap(log_mapped
, mapsz
);
1724 while (rec
< logend
&& *rec
!= '>' && *rec
!= '\n')
1726 if (rec
== logend
|| *rec
== '\n')
1727 die("Log %s is corrupt.", logfile
);
1728 date
= strtoul(rec
+ 1, &tz_c
, 10);
1729 tz
= strtoul(tz_c
, NULL
, 10);
1730 if (get_sha1_hex(logdata
, sha1
))
1731 die("Log %s is corrupt.", logfile
);
1732 if (is_null_sha1(sha1
)) {
1733 if (get_sha1_hex(logdata
+ 41, sha1
))
1734 die("Log %s is corrupt.", logfile
);
1737 *msg
= ref_msg(logdata
, logend
);
1738 munmap(log_mapped
, mapsz
);
1741 *cutoff_time
= date
;
1745 *cutoff_cnt
= reccnt
;
1749 int for_each_recent_reflog_ent(const char *ref
, each_reflog_ent_fn fn
, long ofs
, void *cb_data
)
1751 const char *logfile
;
1753 struct strbuf sb
= STRBUF_INIT
;
1756 logfile
= git_path("logs/%s", ref
);
1757 logfp
= fopen(logfile
, "r");
1762 struct stat statbuf
;
1763 if (fstat(fileno(logfp
), &statbuf
) ||
1764 statbuf
.st_size
< ofs
||
1765 fseek(logfp
, -ofs
, SEEK_END
) ||
1766 strbuf_getwholeline(&sb
, logfp
, '\n')) {
1768 strbuf_release(&sb
);
1773 while (!strbuf_getwholeline(&sb
, logfp
, '\n')) {
1774 unsigned char osha1
[20], nsha1
[20];
1775 char *email_end
, *message
;
1776 unsigned long timestamp
;
1779 /* old SP new SP name <email> SP time TAB msg LF */
1780 if (sb
.len
< 83 || sb
.buf
[sb
.len
- 1] != '\n' ||
1781 get_sha1_hex(sb
.buf
, osha1
) || sb
.buf
[40] != ' ' ||
1782 get_sha1_hex(sb
.buf
+ 41, nsha1
) || sb
.buf
[81] != ' ' ||
1783 !(email_end
= strchr(sb
.buf
+ 82, '>')) ||
1784 email_end
[1] != ' ' ||
1785 !(timestamp
= strtoul(email_end
+ 2, &message
, 10)) ||
1786 !message
|| message
[0] != ' ' ||
1787 (message
[1] != '+' && message
[1] != '-') ||
1788 !isdigit(message
[2]) || !isdigit(message
[3]) ||
1789 !isdigit(message
[4]) || !isdigit(message
[5]))
1790 continue; /* corrupt? */
1791 email_end
[1] = '\0';
1792 tz
= strtol(message
+ 1, NULL
, 10);
1793 if (message
[6] != '\t')
1797 ret
= fn(osha1
, nsha1
, sb
.buf
+ 82, timestamp
, tz
, message
,
1803 strbuf_release(&sb
);
1807 int for_each_reflog_ent(const char *ref
, each_reflog_ent_fn fn
, void *cb_data
)
1809 return for_each_recent_reflog_ent(ref
, fn
, 0, cb_data
);
1812 static int do_for_each_reflog(const char *base
, each_ref_fn fn
, void *cb_data
)
1814 DIR *dir
= opendir(git_path("logs/%s", base
));
1819 int baselen
= strlen(base
);
1820 char *log
= xmalloc(baselen
+ 257);
1822 memcpy(log
, base
, baselen
);
1823 if (baselen
&& base
[baselen
-1] != '/')
1824 log
[baselen
++] = '/';
1826 while ((de
= readdir(dir
)) != NULL
) {
1830 if (de
->d_name
[0] == '.')
1832 namelen
= strlen(de
->d_name
);
1835 if (has_extension(de
->d_name
, ".lock"))
1837 memcpy(log
+ baselen
, de
->d_name
, namelen
+1);
1838 if (stat(git_path("logs/%s", log
), &st
) < 0)
1840 if (S_ISDIR(st
.st_mode
)) {
1841 retval
= do_for_each_reflog(log
, fn
, cb_data
);
1843 unsigned char sha1
[20];
1844 if (!resolve_ref(log
, sha1
, 0, NULL
))
1845 retval
= error("bad ref for %s", log
);
1847 retval
= fn(log
, sha1
, 0, cb_data
);
1860 int for_each_reflog(each_ref_fn fn
, void *cb_data
)
1862 return do_for_each_reflog("", fn
, cb_data
);
1865 int update_ref(const char *action
, const char *refname
,
1866 const unsigned char *sha1
, const unsigned char *oldval
,
1867 int flags
, enum action_on_err onerr
)
1869 static struct ref_lock
*lock
;
1870 lock
= lock_any_ref_for_update(refname
, oldval
, flags
);
1872 const char *str
= "Cannot lock 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;
1880 if (write_ref_sha1(lock
, sha1
, action
) < 0) {
1881 const char *str
= "Cannot update the ref '%s'.";
1883 case MSG_ON_ERR
: error(str
, refname
); break;
1884 case DIE_ON_ERR
: die(str
, refname
); break;
1885 case QUIET_ON_ERR
: break;
1892 int ref_exists(const char *refname
)
1894 unsigned char sha1
[20];
1895 return !!resolve_ref(refname
, sha1
, 1, NULL
);
1898 struct ref
*find_ref_by_name(const struct ref
*list
, const char *name
)
1900 for ( ; list
; list
= list
->next
)
1901 if (!strcmp(list
->name
, name
))
1902 return (struct ref
*)list
;
1907 * generate a format suitable for scanf from a ref_rev_parse_rules
1908 * rule, that is replace the "%.*s" spec with a "%s" spec
1910 static void gen_scanf_fmt(char *scanf_fmt
, const char *rule
)
1914 spec
= strstr(rule
, "%.*s");
1915 if (!spec
|| strstr(spec
+ 4, "%.*s"))
1916 die("invalid rule in ref_rev_parse_rules: %s", rule
);
1918 /* copy all until spec */
1919 strncpy(scanf_fmt
, rule
, spec
- rule
);
1920 scanf_fmt
[spec
- rule
] = '\0';
1922 strcat(scanf_fmt
, "%s");
1923 /* copy remaining rule */
1924 strcat(scanf_fmt
, spec
+ 4);
1929 char *shorten_unambiguous_ref(const char *ref
, int strict
)
1932 static char **scanf_fmts
;
1933 static int nr_rules
;
1936 /* pre generate scanf formats from ref_rev_parse_rules[] */
1938 size_t total_len
= 0;
1940 /* the rule list is NULL terminated, count them first */
1941 for (; ref_rev_parse_rules
[nr_rules
]; nr_rules
++)
1942 /* no +1 because strlen("%s") < strlen("%.*s") */
1943 total_len
+= strlen(ref_rev_parse_rules
[nr_rules
]);
1945 scanf_fmts
= xmalloc(nr_rules
* sizeof(char *) + total_len
);
1948 for (i
= 0; i
< nr_rules
; i
++) {
1949 scanf_fmts
[i
] = (char *)&scanf_fmts
[nr_rules
]
1951 gen_scanf_fmt(scanf_fmts
[i
], ref_rev_parse_rules
[i
]);
1952 total_len
+= strlen(ref_rev_parse_rules
[i
]);
1956 /* bail out if there are no rules */
1958 return xstrdup(ref
);
1960 /* buffer for scanf result, at most ref must fit */
1961 short_name
= xstrdup(ref
);
1963 /* skip first rule, it will always match */
1964 for (i
= nr_rules
- 1; i
> 0 ; --i
) {
1966 int rules_to_fail
= i
;
1969 if (1 != sscanf(ref
, scanf_fmts
[i
], short_name
))
1972 short_name_len
= strlen(short_name
);
1975 * in strict mode, all (except the matched one) rules
1976 * must fail to resolve to a valid non-ambiguous ref
1979 rules_to_fail
= nr_rules
;
1982 * check if the short name resolves to a valid ref,
1983 * but use only rules prior to the matched one
1985 for (j
= 0; j
< rules_to_fail
; j
++) {
1986 const char *rule
= ref_rev_parse_rules
[j
];
1987 unsigned char short_objectname
[20];
1988 char refname
[PATH_MAX
];
1990 /* skip matched rule */
1995 * the short name is ambiguous, if it resolves
1996 * (with this previous rule) to a valid ref
1997 * read_ref() returns 0 on success
1999 mksnpath(refname
, sizeof(refname
),
2000 rule
, short_name_len
, short_name
);
2001 if (!read_ref(refname
, short_objectname
))
2006 * short name is non-ambiguous if all previous rules
2007 * haven't resolved to a valid ref
2009 if (j
== rules_to_fail
)
2014 return xstrdup(ref
);