Make old sha1 optional with git update-ref -d
[gitweb.git] / remote.c
index 65ff4141d1317a581942a8979dfe50c0e09eb502..91e3b112bb5ffa151a8ede9391d3bd88ea4d3500 100644 (file)
--- a/remote.c
+++ b/remote.c
@@ -2,6 +2,16 @@
 #include "remote.h"
 #include "refs.h"
 
+static struct refspec s_tag_refspec = {
+       0,
+       1,
+       0,
+       "refs/tags/",
+       "refs/tags/"
+};
+
+const struct refspec *tag_refspec = &s_tag_refspec;
+
 struct counted_string {
        size_t len;
        const char *s;
@@ -288,7 +298,7 @@ static void read_branches_file(struct remote *remote)
        remote->fetch_tags = 1; /* always auto-follow */
 }
 
-static int handle_config(const char *key, const char *value)
+static int handle_config(const char *key, const char *value, void *cb)
 {
        const char *name;
        const char *subkey;
@@ -410,7 +420,7 @@ static void read_config(void)
                current_branch =
                        make_branch(head_ref + strlen("refs/heads/"), 0);
        }
-       git_config(handle_config);
+       git_config(handle_config, NULL);
        alias_all_urls();
 }
 
@@ -434,6 +444,16 @@ static struct refspec *parse_refspec_internal(int nr_refspec, const char **refsp
                }
 
                rhs = strrchr(lhs, ':');
+
+               /*
+                * Before going on, special case ":" (or "+:") as a refspec
+                * for matching refs.
+                */
+               if (!fetch && rhs == lhs && rhs[1] == '\0') {
+                       rs[i].matching = 1;
+                       continue;
+               }
+
                if (rhs) {
                        rhs++;
                        rlen = strlen(rhs);
@@ -691,6 +711,13 @@ struct ref *alloc_ref(unsigned namelen)
        return ret;
 }
 
+struct ref *alloc_ref_from_str(const char* str)
+{
+       struct ref *ret = alloc_ref(strlen(str) + 1);
+       strcpy(ret->name, str);
+       return ret;
+}
+
 static struct ref *copy_ref(const struct ref *ref)
 {
        struct ref *ret = xmalloc(sizeof(struct ref) + strlen(ref->name) + 1);
@@ -711,13 +738,22 @@ struct ref *copy_ref_list(const struct ref *ref)
        return ret;
 }
 
+void free_ref(struct ref *ref)
+{
+       if (!ref)
+               return;
+       free(ref->remote_status);
+       free(ref->symref);
+       free(ref);
+}
+
 void free_refs(struct ref *ref)
 {
        struct ref *next;
        while (ref) {
                next = ref->next;
                free(ref->peer_ref);
-               free(ref);
+               free_ref(ref);
                ref = next;
        }
 }
@@ -788,7 +824,6 @@ static struct ref *try_explicit_object_name(const char *name)
 {
        unsigned char sha1[20];
        struct ref *ref;
-       int len;
 
        if (!*name) {
                ref = alloc_ref(20);
@@ -798,25 +833,38 @@ static struct ref *try_explicit_object_name(const char *name)
        }
        if (get_sha1(name, sha1))
                return NULL;
-       len = strlen(name) + 1;
-       ref = alloc_ref(len);
-       memcpy(ref->name, name, len);
+       ref = alloc_ref_from_str(name);
        hashcpy(ref->new_sha1, sha1);
        return ref;
 }
 
 static struct ref *make_linked_ref(const char *name, struct ref ***tail)
 {
-       struct ref *ret;
-       size_t len;
-
-       len = strlen(name) + 1;
-       ret = alloc_ref(len);
-       memcpy(ret->name, name, len);
+       struct ref *ret = alloc_ref_from_str(name);
        tail_link_ref(ret, tail);
        return ret;
 }
 
+static char *guess_ref(const char *name, struct ref *peer)
+{
+       struct strbuf buf = STRBUF_INIT;
+       unsigned char sha1[20];
+
+       const char *r = resolve_ref(peer->name, sha1, 1, NULL);
+       if (!r)
+               return NULL;
+
+       if (!prefixcmp(r, "refs/heads/"))
+               strbuf_addstr(&buf, "refs/heads/");
+       else if (!prefixcmp(r, "refs/tags/"))
+               strbuf_addstr(&buf, "refs/tags/");
+       else
+               return NULL;
+
+       strbuf_addstr(&buf, name);
+       return strbuf_detach(&buf, NULL);
+}
+
 static int match_explicit(struct ref *src, struct ref *dst,
                          struct ref ***dst_tail,
                          struct refspec *rs,
@@ -825,8 +873,9 @@ static int match_explicit(struct ref *src, struct ref *dst,
        struct ref *matched_src, *matched_dst;
 
        const char *dst_value = rs->dst;
+       char *dst_guess;
 
-       if (rs->pattern)
+       if (rs->pattern || rs->matching)
                return errs;
 
        matched_src = matched_dst = NULL;
@@ -871,10 +920,15 @@ static int match_explicit(struct ref *src, struct ref *dst,
        case 0:
                if (!memcmp(dst_value, "refs/", 5))
                        matched_dst = make_linked_ref(dst_value, dst_tail);
+               else if((dst_guess = guess_ref(dst_value, matched_src)))
+                       matched_dst = make_linked_ref(dst_guess, dst_tail);
                else
-                       error("dst refspec %s does not match any "
-                             "existing ref on the remote and does "
-                             "not start with refs/.", dst_value);
+                       error("unable to push to unqualified destination: %s\n"
+                             "The destination refspec neither matches an "
+                             "existing ref on the remote nor\n"
+                             "begins with refs/, and we are unable to "
+                             "guess a prefix based on the source ref.",
+                             dst_value);
                break;
        default:
                matched_dst = NULL;
@@ -911,13 +965,23 @@ static const struct refspec *check_pattern_match(const struct refspec *rs,
                                                 const struct ref *src)
 {
        int i;
+       int matching_refs = -1;
        for (i = 0; i < rs_nr; i++) {
+               if (rs[i].matching &&
+                   (matching_refs == -1 || rs[i].force)) {
+                       matching_refs = i;
+                       continue;
+               }
+
                if (rs[i].pattern &&
                    !prefixcmp(src->name, rs[i].src) &&
                    src->name[strlen(rs[i].src)] == '/')
                        return rs + i;
        }
-       return NULL;
+       if (matching_refs != -1)
+               return rs + matching_refs;
+       else
+               return NULL;
 }
 
 /*
@@ -928,11 +992,16 @@ static const struct refspec *check_pattern_match(const struct refspec *rs,
 int match_refs(struct ref *src, struct ref *dst, struct ref ***dst_tail,
               int nr_refspec, const char **refspec, int flags)
 {
-       struct refspec *rs =
-               parse_push_refspec(nr_refspec, (const char **) refspec);
+       struct refspec *rs;
        int send_all = flags & MATCH_REFS_ALL;
        int send_mirror = flags & MATCH_REFS_MIRROR;
+       static const char *default_refspec[] = { ":", 0 };
 
+       if (!nr_refspec) {
+               nr_refspec = 1;
+               refspec = default_refspec;
+       }
+       rs = parse_push_refspec(nr_refspec, (const char **) refspec);
        if (match_explicit_refs(src, dst, dst_tail, rs, nr_refspec))
                return -1;
 
@@ -943,48 +1012,50 @@ int match_refs(struct ref *src, struct ref *dst, struct ref ***dst_tail,
                char *dst_name;
                if (src->peer_ref)
                        continue;
-               if (nr_refspec) {
-                       pat = check_pattern_match(rs, nr_refspec, src);
-                       if (!pat)
-                               continue;
-               }
-               else if (!send_mirror && prefixcmp(src->name, "refs/heads/"))
+
+               pat = check_pattern_match(rs, nr_refspec, src);
+               if (!pat)
+                       continue;
+
+               if (pat->matching) {
                        /*
                         * "matching refs"; traditionally we pushed everything
                         * including refs outside refs/heads/ hierarchy, but
                         * that does not make much sense these days.
                         */
-                       continue;
+                       if (!send_mirror && prefixcmp(src->name, "refs/heads/"))
+                               continue;
+                       dst_name = xstrdup(src->name);
 
-               if (pat) {
+               } else {
                        const char *dst_side = pat->dst ? pat->dst : pat->src;
                        dst_name = xmalloc(strlen(dst_side) +
                                           strlen(src->name) -
                                           strlen(pat->src) + 2);
                        strcpy(dst_name, dst_side);
                        strcat(dst_name, src->name + strlen(pat->src));
-               } else
-                       dst_name = xstrdup(src->name);
+               }
                dst_peer = find_ref_by_name(dst, dst_name);
-               if (dst_peer && dst_peer->peer_ref)
-                       /* We're already sending something to this ref. */
-                       goto free_name;
+               if (dst_peer) {
+                       if (dst_peer->peer_ref)
+                               /* We're already sending something to this ref. */
+                               goto free_name;
+
+               } else {
+                       if (pat->matching && !(send_all || send_mirror))
+                               /*
+                                * Remote doesn't have it, and we have no
+                                * explicit pattern, and we don't have
+                                * --all nor --mirror.
+                                */
+                               goto free_name;
 
-               if (!dst_peer && !nr_refspec && !(send_all || send_mirror))
-                       /*
-                        * Remote doesn't have it, and we have no
-                        * explicit pattern, and we don't have
-                        * --all nor --mirror.
-                        */
-                       goto free_name;
-               if (!dst_peer) {
                        /* Create a new one and link it */
                        dst_peer = make_linked_ref(dst_name, dst_tail);
                        hashcpy(dst_peer->new_sha1, src->new_sha1);
                }
                dst_peer->peer_ref = src;
-               if (pat)
-                       dst_peer->force = pat->force;
+               dst_peer->force = pat->force;
        free_name:
                free(dst_name);
        }
@@ -1090,9 +1161,7 @@ static struct ref *get_local_ref(const char *name)
                return NULL;
 
        if (!prefixcmp(name, "refs/")) {
-               ret = alloc_ref(strlen(name) + 1);
-               strcpy(ret->name, name);
-               return ret;
+               return alloc_ref_from_str(name);
        }
 
        if (!prefixcmp(name, "heads/") ||
@@ -1151,3 +1220,15 @@ int get_fetch_map(const struct ref *remote_refs,
 
        return 0;
 }
+
+int resolve_remote_symref(struct ref *ref, struct ref *list)
+{
+       if (!ref->symref)
+               return 0;
+       for (; list; list = list->next)
+               if (!strcmp(ref->symref, list->name)) {
+                       hashcpy(ref->old_sha1, list->old_sha1);
+                       return 0;
+               }
+       return 1;
+}