Merge branch 'sv/first-parent'

[git.git] / remote.c

diff --git a/remote.c b/remote.c
index 65ff4141d1317a581942a8979dfe50c0e09eb502..91cbb72ddeba1c60dab7aad2105e1c004ea6e198 100644 (file)
--- a/remote.c
+++ b/remote.c
@@ -691,6 +691,13 @@ 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 +718,22 @@ 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 +804,6 @@ 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 +813,38 @@ 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,
@@ -825,6 +853,7 @@ 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)
                return errs;
@@ -871,10 +900,15 @@ 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;
@@ -1090,9 +1124,7 @@ 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 +1183,15 @@ 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;
+}