Add duplicate function

confection.go

@@ -27,3 +27,16 @@ func unmarshal(body []byte, target interface{}) error {
 
 	return nil
 }
+
+func duplicate(original interface{}) interface{} {
+	// Get the interface value
+	val := reflect.ValueOf(original)
+	// We expect a pointer to a struct, so now we need the underlying staruct
+	val = reflect.Indirect(val)
+	// Now we need the type (name) of this struct
+	typ := val.Type()
+	// Creating a duplicate instance of that struct
+	dupe := reflect.New(typ).Interface()
+
+	return dupe
+}

confection_test.go

@@ -42,3 +42,12 @@ func TestUnmarshal(t *testing.T) {
 		t.Errorf("Expected Bar to equal %q, got %q", 1, conf.Bar)
 	}
 }
+
+func TestDuplicate(t *testing.T) {
+	var i interface{} = &testConf{}
+
+	dupe := duplicate(i)
+	if _, ok := dupe.(*testConf); !ok {
+		t.Error("Duplication failed")
+	}
+}