5 static struct remote **remotes;
6 static int allocated_remotes;
8 static struct branch **branches;
9 static int allocated_branches;
11 static struct branch *current_branch;
12 static const char *default_remote_name;
14 #define BUF_SIZE (2048)
15 static char buffer[BUF_SIZE];
17 static void add_push_refspec(struct remote *remote, const char *ref)
19 int nr = remote->push_refspec_nr + 1;
20 remote->push_refspec =
21 xrealloc(remote->push_refspec, nr * sizeof(char *));
22 remote->push_refspec[nr-1] = ref;
23 remote->push_refspec_nr = nr;
26 static void add_fetch_refspec(struct remote *remote, const char *ref)
28 int nr = remote->fetch_refspec_nr + 1;
29 remote->fetch_refspec =
30 xrealloc(remote->fetch_refspec, nr * sizeof(char *));
31 remote->fetch_refspec[nr-1] = ref;
32 remote->fetch_refspec_nr = nr;
35 static void add_uri(struct remote *remote, const char *uri)
37 int nr = remote->uri_nr + 1;
39 xrealloc(remote->uri, nr * sizeof(char *));
40 remote->uri[nr-1] = uri;
44 static struct remote *make_remote(const char *name, int len)
48 for (i = 0; i < allocated_remotes; i++) {
53 if (len ? (!strncmp(name, remotes[i]->name, len) &&
54 !remotes[i]->name[len]) :
55 !strcmp(name, remotes[i]->name))
61 empty = allocated_remotes;
62 allocated_remotes += allocated_remotes ? allocated_remotes : 1;
63 remotes = xrealloc(remotes,
64 sizeof(*remotes) * allocated_remotes);
65 memset(remotes + empty, 0,
66 (allocated_remotes - empty) * sizeof(*remotes));
68 remotes[empty] = xcalloc(1, sizeof(struct remote));
70 remotes[empty]->name = xstrndup(name, len);
72 remotes[empty]->name = xstrdup(name);
73 return remotes[empty];
76 static void add_merge(struct branch *branch, const char *name)
78 int nr = branch->merge_nr + 1;
80 xrealloc(branch->merge_name, nr * sizeof(char *));
81 branch->merge_name[nr-1] = name;
82 branch->merge_nr = nr;
85 static struct branch *make_branch(const char *name, int len)
90 for (i = 0; i < allocated_branches; i++) {
95 if (len ? (!strncmp(name, branches[i]->name, len) &&
96 !branches[i]->name[len]) :
97 !strcmp(name, branches[i]->name))
103 empty = allocated_branches;
104 allocated_branches += allocated_branches ? allocated_branches : 1;
105 branches = xrealloc(branches,
106 sizeof(*branches) * allocated_branches);
107 memset(branches + empty, 0,
108 (allocated_branches - empty) * sizeof(*branches));
110 branches[empty] = xcalloc(1, sizeof(struct branch));
112 branches[empty]->name = xstrndup(name, len);
114 branches[empty]->name = xstrdup(name);
115 refname = malloc(strlen(name) + strlen("refs/heads/") + 1);
116 strcpy(refname, "refs/heads/");
117 strcpy(refname + strlen("refs/heads/"),
118 branches[empty]->name);
119 branches[empty]->refname = refname;
121 return branches[empty];
124 static void read_remotes_file(struct remote *remote)
126 FILE *f = fopen(git_path("remotes/%s", remote->name), "r");
130 while (fgets(buffer, BUF_SIZE, f)) {
134 if (!prefixcmp(buffer, "URL:")) {
137 } else if (!prefixcmp(buffer, "Push:")) {
140 } else if (!prefixcmp(buffer, "Pull:")) {
152 while (isspace(p[-1]))
155 switch (value_list) {
157 add_uri(remote, xstrdup(s));
160 add_push_refspec(remote, xstrdup(s));
163 add_fetch_refspec(remote, xstrdup(s));
170 static void read_branches_file(struct remote *remote)
172 const char *slash = strchr(remote->name, '/');
175 int n = slash ? slash - remote->name : 1000;
176 FILE *f = fopen(git_path("branches/%.*s", n, remote->name), "r");
182 s = fgets(buffer, BUF_SIZE, f);
191 while (isspace(p[-1]))
195 len += strlen(slash);
196 p = xmalloc(len + 1);
200 frag = strchr(p, '#');
203 branch = xmalloc(strlen(frag) + 12);
204 strcpy(branch, "refs/heads/");
205 strcat(branch, frag);
207 branch = "refs/heads/master";
210 add_fetch_refspec(remote, branch);
211 remote->fetch_tags = 1; /* always auto-follow */
214 static int handle_config(const char *key, const char *value)
218 struct remote *remote;
219 struct branch *branch;
220 if (!prefixcmp(key, "branch.")) {
222 subkey = strrchr(name, '.');
223 branch = make_branch(name, subkey - name);
228 if (!strcmp(subkey, ".remote")) {
229 branch->remote_name = xstrdup(value);
230 if (branch == current_branch)
231 default_remote_name = branch->remote_name;
232 } else if (!strcmp(subkey, ".merge"))
233 add_merge(branch, xstrdup(value));
236 if (prefixcmp(key, "remote."))
239 subkey = strrchr(name, '.');
241 return error("Config with no key for remote %s", name);
242 if (*subkey == '/') {
243 warning("Config remote shorthand cannot begin with '/': %s", name);
246 remote = make_remote(name, subkey - name);
248 /* if we ever have a boolean variable, e.g. "remote.*.disabled"
251 * is a valid way to set it to true; we get NULL in value so
252 * we need to handle it here.
254 * if (!strcmp(subkey, ".disabled")) {
255 * val = git_config_bool(key, value);
260 return 0; /* ignore unknown booleans */
262 if (!strcmp(subkey, ".url")) {
263 add_uri(remote, xstrdup(value));
264 } else if (!strcmp(subkey, ".push")) {
265 add_push_refspec(remote, xstrdup(value));
266 } else if (!strcmp(subkey, ".fetch")) {
267 add_fetch_refspec(remote, xstrdup(value));
268 } else if (!strcmp(subkey, ".receivepack")) {
269 if (!remote->receivepack)
270 remote->receivepack = xstrdup(value);
272 error("more than one receivepack given, using the first");
273 } else if (!strcmp(subkey, ".uploadpack")) {
274 if (!remote->uploadpack)
275 remote->uploadpack = xstrdup(value);
277 error("more than one uploadpack given, using the first");
278 } else if (!strcmp(subkey, ".tagopt")) {
279 if (!strcmp(value, "--no-tags"))
280 remote->fetch_tags = -1;
285 static void read_config(void)
287 unsigned char sha1[20];
288 const char *head_ref;
290 if (default_remote_name) // did this already
292 default_remote_name = xstrdup("origin");
293 current_branch = NULL;
294 head_ref = resolve_ref("HEAD", sha1, 0, &flag);
295 if (head_ref && (flag & REF_ISSYMREF) &&
296 !prefixcmp(head_ref, "refs/heads/")) {
298 make_branch(head_ref + strlen("refs/heads/"), 0);
300 git_config(handle_config);
303 struct refspec *parse_ref_spec(int nr_refspec, const char **refspec)
306 struct refspec *rs = xcalloc(sizeof(*rs), nr_refspec);
307 for (i = 0; i < nr_refspec; i++) {
308 const char *sp, *ep, *gp;
314 gp = strchr(sp, '*');
315 ep = strchr(sp, ':');
316 if (gp && ep && gp > ep)
320 const char *glob = strchr(ep + 1, '*');
324 rs[i].dst = xstrndup(ep + 1,
327 rs[i].dst = xstrdup(ep + 1);
330 ep = sp + strlen(sp);
336 rs[i].src = xstrndup(sp, ep - sp);
341 struct remote *remote_get(const char *name)
347 name = default_remote_name;
348 ret = make_remote(name, 0);
349 if (name[0] != '/') {
351 read_remotes_file(ret);
353 read_branches_file(ret);
359 if (!strcmp(name, ".")) {
360 // we always fetch "refs/*:refs/*", which is trivial
361 add_fetch_refspec(ret, "refs/*:refs/*");
363 ret->fetch = parse_ref_spec(ret->fetch_refspec_nr, ret->fetch_refspec);
364 ret->push = parse_ref_spec(ret->push_refspec_nr, ret->push_refspec);
368 int for_each_remote(each_remote_fn fn, void *priv)
372 for (i = 0; i < allocated_remotes && !result; i++) {
373 struct remote *r = remotes[i];
377 r->fetch = parse_ref_spec(r->fetch_refspec_nr,
380 r->push = parse_ref_spec(r->push_refspec_nr,
382 result = fn(r, priv);
387 int remote_has_uri(struct remote *remote, const char *uri)
390 for (i = 0; i < remote->uri_nr; i++) {
391 if (!strcmp(remote->uri[i], uri))
398 * Returns true if, under the matching rules for fetching, name is the
399 * same as the given full name.
401 static int ref_matches_abbrev(const char *name, const char *full)
403 if (!prefixcmp(name, "refs/") || !strcmp(name, "HEAD"))
404 return !strcmp(name, full);
405 if (prefixcmp(full, "refs/"))
407 if (!prefixcmp(name, "heads/") ||
408 !prefixcmp(name, "tags/") ||
409 !prefixcmp(name, "remotes/"))
410 return !strcmp(name, full + 5);
411 if (prefixcmp(full + 5, "heads/"))
413 return !strcmp(full + 11, name);
416 int remote_find_tracking(struct remote *remote, struct refspec *refspec)
418 int find_src = refspec->src == NULL;
419 char *needle, **result;
423 if (refspec->dst == NULL)
424 return error("find_tracking: need either src or dst");
425 needle = refspec->dst;
426 result = &refspec->src;
428 needle = refspec->src;
429 result = &refspec->dst;
432 for (i = 0; i < remote->fetch_refspec_nr; i++) {
433 struct refspec *fetch = &remote->fetch[i];
434 const char *key = find_src ? fetch->dst : fetch->src;
435 const char *value = find_src ? fetch->src : fetch->dst;
438 if (fetch->pattern) {
439 if (!prefixcmp(needle, key)) {
440 *result = xmalloc(strlen(value) +
443 strcpy(*result, value);
444 strcpy(*result + strlen(value),
445 needle + strlen(key));
446 refspec->force = fetch->force;
449 } else if (!strcmp(needle, key)) {
450 *result = xstrdup(value);
451 refspec->force = fetch->force;
458 struct ref *alloc_ref(unsigned namelen)
460 struct ref *ret = xmalloc(sizeof(struct ref) + namelen);
461 memset(ret, 0, sizeof(struct ref) + namelen);
465 static struct ref *copy_ref(struct ref *ref)
467 struct ref *ret = xmalloc(sizeof(struct ref) + strlen(ref->name) + 1);
468 memcpy(ret, ref, sizeof(struct ref) + strlen(ref->name) + 1);
473 void free_refs(struct ref *ref)
485 static int count_refspec_match(const char *pattern,
487 struct ref **matched_ref)
489 int patlen = strlen(pattern);
490 struct ref *matched_weak = NULL;
491 struct ref *matched = NULL;
495 for (weak_match = match = 0; refs; refs = refs->next) {
496 char *name = refs->name;
497 int namelen = strlen(name);
499 if (namelen < patlen ||
500 memcmp(name + namelen - patlen, pattern, patlen))
502 if (namelen != patlen && name[namelen - patlen - 1] != '/')
505 /* A match is "weak" if it is with refs outside
506 * heads or tags, and did not specify the pattern
507 * in full (e.g. "refs/remotes/origin/master") or at
508 * least from the toplevel (e.g. "remotes/origin/master");
509 * otherwise "git push $URL master" would result in
510 * ambiguity between remotes/origin/master and heads/master
511 * at the remote site.
513 if (namelen != patlen &&
514 patlen != namelen - 5 &&
515 prefixcmp(name, "refs/heads/") &&
516 prefixcmp(name, "refs/tags/")) {
517 /* We want to catch the case where only weak
518 * matches are found and there are multiple
519 * matches, and where more than one strong
520 * matches are found, as ambiguous. One
521 * strong match with zero or more weak matches
522 * are acceptable as a unique match.
533 *matched_ref = matched_weak;
537 *matched_ref = matched;
542 static void tail_link_ref(struct ref *ref, struct ref ***tail)
550 static struct ref *try_explicit_object_name(const char *name)
552 unsigned char sha1[20];
558 strcpy(ref->name, "(delete)");
559 hashclr(ref->new_sha1);
562 if (get_sha1(name, sha1))
564 len = strlen(name) + 1;
565 ref = alloc_ref(len);
566 memcpy(ref->name, name, len);
567 hashcpy(ref->new_sha1, sha1);
571 static struct ref *make_linked_ref(const char *name, struct ref ***tail)
576 len = strlen(name) + 1;
577 ret = alloc_ref(len);
578 memcpy(ret->name, name, len);
579 tail_link_ref(ret, tail);
583 static int match_explicit(struct ref *src, struct ref *dst,
584 struct ref ***dst_tail,
588 struct ref *matched_src, *matched_dst;
590 const char *dst_value = rs->dst;
595 matched_src = matched_dst = NULL;
596 switch (count_refspec_match(rs->src, src, &matched_src)) {
600 /* The source could be in the get_sha1() format
601 * not a reference name. :refs/other is a
602 * way to delete 'other' ref at the remote end.
604 matched_src = try_explicit_object_name(rs->src);
607 error("src refspec %s does not match any.",
612 error("src refspec %s matches more than one.",
620 if (dst_value == NULL)
621 dst_value = matched_src->name;
623 switch (count_refspec_match(dst_value, dst, &matched_dst)) {
627 if (!memcmp(dst_value, "refs/", 5))
628 matched_dst = make_linked_ref(dst_value, dst_tail);
630 error("dst refspec %s does not match any "
631 "existing ref on the remote and does "
632 "not start with refs/.", dst_value);
636 error("dst refspec %s matches more than one.",
640 if (errs || matched_dst == NULL)
642 if (matched_dst->peer_ref) {
644 error("dst ref %s receives from more than one src.",
648 matched_dst->peer_ref = matched_src;
649 matched_dst->force = rs->force;
654 static int match_explicit_refs(struct ref *src, struct ref *dst,
655 struct ref ***dst_tail, struct refspec *rs,
659 for (i = errs = 0; i < rs_nr; i++)
660 errs |= match_explicit(src, dst, dst_tail, &rs[i], errs);
664 static struct ref *find_ref_by_name(struct ref *list, const char *name)
666 for ( ; list; list = list->next)
667 if (!strcmp(list->name, name))
672 static const struct refspec *check_pattern_match(const struct refspec *rs,
674 const struct ref *src)
677 for (i = 0; i < rs_nr; i++) {
678 if (rs[i].pattern && !prefixcmp(src->name, rs[i].src))
685 * Note. This is used only by "push"; refspec matching rules for
686 * push and fetch are subtly different, so do not try to reuse it
689 int match_refs(struct ref *src, struct ref *dst, struct ref ***dst_tail,
690 int nr_refspec, char **refspec, int all)
693 parse_ref_spec(nr_refspec, (const char **) refspec);
695 if (match_explicit_refs(src, dst, dst_tail, rs, nr_refspec))
698 /* pick the remainder */
699 for ( ; src; src = src->next) {
700 struct ref *dst_peer;
701 const struct refspec *pat = NULL;
706 pat = check_pattern_match(rs, nr_refspec, src);
710 else if (prefixcmp(src->name, "refs/heads/"))
712 * "matching refs"; traditionally we pushed everything
713 * including refs outside refs/heads/ hierarchy, but
714 * that does not make much sense these days.
719 const char *dst_side = pat->dst ? pat->dst : pat->src;
720 dst_name = xmalloc(strlen(dst_side) +
722 strlen(pat->src) + 2);
723 strcpy(dst_name, dst_side);
724 strcat(dst_name, src->name + strlen(pat->src));
726 dst_name = xstrdup(src->name);
727 dst_peer = find_ref_by_name(dst, dst_name);
728 if (dst_peer && dst_peer->peer_ref)
729 /* We're already sending something to this ref. */
731 if (!dst_peer && !nr_refspec && !all)
732 /* Remote doesn't have it, and we have no
733 * explicit pattern, and we don't have
737 /* Create a new one and link it */
738 dst_peer = make_linked_ref(dst_name, dst_tail);
739 hashcpy(dst_peer->new_sha1, src->new_sha1);
741 dst_peer->peer_ref = src;
748 struct branch *branch_get(const char *name)
753 if (!name || !*name || !strcmp(name, "HEAD"))
754 ret = current_branch;
756 ret = make_branch(name, 0);
757 if (ret && ret->remote_name) {
758 ret->remote = remote_get(ret->remote_name);
761 ret->merge = xcalloc(sizeof(*ret->merge),
763 for (i = 0; i < ret->merge_nr; i++) {
764 ret->merge[i] = xcalloc(1, sizeof(**ret->merge));
765 ret->merge[i]->src = xstrdup(ret->merge_name[i]);
766 remote_find_tracking(ret->remote,
774 int branch_has_merge_config(struct branch *branch)
776 return branch && !!branch->merge;
779 int branch_merges(struct branch *branch, const char *refname)
784 for (i = 0; i < branch->merge_nr; i++) {
785 if (ref_matches_abbrev(branch->merge[i]->src, refname))
791 static struct ref *get_expanded_map(struct ref *remote_refs,
792 const struct refspec *refspec)
795 struct ref *ret = NULL;
796 struct ref **tail = &ret;
798 int remote_prefix_len = strlen(refspec->src);
799 int local_prefix_len = strlen(refspec->dst);
801 for (ref = remote_refs; ref; ref = ref->next) {
802 if (strchr(ref->name, '^'))
803 continue; /* a dereference item */
804 if (!prefixcmp(ref->name, refspec->src)) {
806 struct ref *cpy = copy_ref(ref);
807 match = ref->name + remote_prefix_len;
809 cpy->peer_ref = alloc_ref(local_prefix_len +
811 sprintf(cpy->peer_ref->name, "%s%s",
812 refspec->dst, match);
814 cpy->peer_ref->force = 1;
823 static struct ref *find_ref_by_name_abbrev(struct ref *refs, const char *name)
826 for (ref = refs; ref; ref = ref->next) {
827 if (ref_matches_abbrev(name, ref->name))
833 struct ref *get_remote_ref(struct ref *remote_refs, const char *name)
835 struct ref *ref = find_ref_by_name_abbrev(remote_refs, name);
838 die("Couldn't find remote ref %s\n", name);
840 return copy_ref(ref);
843 static struct ref *get_local_ref(const char *name)
849 if (!prefixcmp(name, "refs/")) {
850 ret = alloc_ref(strlen(name) + 1);
851 strcpy(ret->name, name);
855 if (!prefixcmp(name, "heads/") ||
856 !prefixcmp(name, "tags/") ||
857 !prefixcmp(name, "remotes/")) {
858 ret = alloc_ref(strlen(name) + 6);
859 sprintf(ret->name, "refs/%s", name);
863 ret = alloc_ref(strlen(name) + 12);
864 sprintf(ret->name, "refs/heads/%s", name);
868 int get_fetch_map(struct ref *remote_refs,
869 const struct refspec *refspec,
872 struct ref *ref_map, *rm;
874 if (refspec->pattern) {
875 ref_map = get_expanded_map(remote_refs, refspec);
877 ref_map = get_remote_ref(remote_refs,
879 refspec->src : "HEAD");
881 ref_map->peer_ref = get_local_ref(refspec->dst);
884 ref_map->peer_ref->force = 1;
887 for (rm = ref_map; rm; rm = rm->next) {
888 if (rm->peer_ref && check_ref_format(rm->peer_ref->name + 5))
889 die("* refusing to create funny ref '%s' locally",
893 tail_link_ref(ref_map, tail);