move locate_head() to remote.c
[git/git.git] / remote.c
index c8b7ea4..49a183e 100644 (file)
--- a/remote.c
+++ b/remote.c
@@ -1451,3 +1451,40 @@ struct ref *get_local_heads(void)
        for_each_ref(one_local_ref, &local_tail);
        return local_refs;
 }
+
+const struct ref *guess_remote_head(const struct ref *refs,
+                                   const struct ref *mapped_refs,
+                                   const struct ref **remote_head_p)
+{
+       const struct ref *remote_head = NULL;
+       const struct ref *remote_master = NULL;
+       const struct ref *r;
+       for (r = refs; r; r = r->next)
+               if (!strcmp(r->name, "HEAD"))
+                       remote_head = r;
+
+       for (r = mapped_refs; r; r = r->next)
+               if (!strcmp(r->name, "refs/heads/master"))
+                       remote_master = r;
+
+       if (remote_head_p)
+               *remote_head_p = remote_head;
+
+       /* If there's no HEAD value at all, never mind. */
+       if (!remote_head)
+               return NULL;
+
+       /* If refs/heads/master could be right, it is. */
+       if (remote_master && !hashcmp(remote_master->old_sha1,
+                                     remote_head->old_sha1))
+               return remote_master;
+
+       /* Look for another ref that points there */
+       for (r = mapped_refs; r; r = r->next)
+               if (r != remote_head &&
+                   !hashcmp(r->old_sha1, remote_head->old_sha1))
+                       return r;
+
+       /* Nothing is the same */
+       return NULL;
+}