Wrap ref creation in elixir

lib/geef.ex

@@ -4,6 +4,7 @@ defmodule Geef do
     quote do
       alias Geef.Repository
       alias Geef.Odb
+      alias Geef.Oid
       alias Geef.Reference
       alias Geef.Object
       alias Geef.Commit

lib/geef/reference.ex

@@ -8,6 +8,19 @@ defrecord Geef.Reference, Record.extract(:geef_reference, from: "src/geef_record
   defp maybe_ref({:ok, ref}), do: {:ok, Reference.from_erl ref}
   defp maybe_ref(err = {:error, _}), do: err
 
+  def create(repo, name, target, force // :false) do
+    :geef_ref.create(repo, name, target, force) |> maybe_ref
+  end
+  def create!(repo, name, target, force // :false) do
+    create(repo, name, target, force) |> assert_ok
+  end
+  def create_symbolic(repo, name, target, force // :false) do
+    :geef_ref.create(repo, name, target, force) |> maybe_ref
+  end
+  def create_symbolic!(repo, name, target, force // :false) do
+    create(repo, name, target, force) |> assert_ok
+  end
+
   def lookup(repo, name), do: :geef_ref.lookup(repo, name) |> maybe_ref
   def lookup!(repo, name), do: lookup(repo, name) |> assert_ok