Replace retrieval of the list of tags by a call to native libgit2 function

1 files changed, 11 insertions, 11 deletions

diff --git a/LibGit2Sharp/TagCollection.cs b/LibGit2Sharp/TagCollection.cs
index 38a34335..bdf03a2b 100644
--- a/LibGit2Sharp/TagCollection.cs
+++ b/LibGit2Sharp/TagCollection.cs
@@ -29,7 +29,7 @@ namespace LibGit2Sharp
         {
             get
             {
-                var reference = repo.Refs[FullReferenceNameFrom(name)];
+                var reference = repo.Refs[NormalizeToCanonicalName(name)];
                 return Tag.BuildFromReference(reference);
             }
         }
@@ -38,8 +38,7 @@ namespace LibGit2Sharp
 
         public IEnumerator<Tag> GetEnumerator()
         {
-            var list = repo.Refs.Where(IsATag).Select(Tag.BuildFromReference);
-            return list.GetEnumerator();
+            return Libgit2UnsafeHelper.ListAllTags(this, repo.Handle).GetEnumerator();
         }
 
         IEnumerator IEnumerable.GetEnumerator()
@@ -86,7 +85,7 @@ namespace LibGit2Sharp
 
             GitObject objectToTag = RetrieveObjectToTag(target);
 
-            Reference tagRef = repo.Refs.Create(FullReferenceNameFrom(name), objectToTag.Id);   //TODO: To be replaced by native libgit2 tag_create_lightweight() when available.
+            Reference tagRef = repo.Refs.Create(NormalizeToCanonicalName(name), objectToTag.Id);   //TODO: To be replaced by native libgit2 tag_create_lightweight() when available.
 
             return Tag.BuildFromReference(tagRef);
         }
@@ -109,15 +108,16 @@ namespace LibGit2Sharp
             if (name.Contains("/")) throw new ArgumentException("Tag name cannot contain the character '/'.");
         }
         
-        private static string FullReferenceNameFrom(string name)
+        private static string NormalizeToCanonicalName(string name)
         {
-            EnsureTagName(name);
-            return string.Format("refs/tags/{0}", name);
-        }
+            Ensure.ArgumentNotNullOrEmptyString(name, "name");
 
-        private static bool IsATag(Reference reference)
-        {
-            return reference.Name.StartsWith("refs/tags/");
+            if (name.StartsWith("refs/tags/", StringComparison.Ordinal))
+            {
+                return name;
+            }
+
+            return string.Format("refs/tags/{0}", name);
         }
     }
 }
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