[LocalSource] Tuning.

lib/cocoapods/local_pod.rb

@@ -518,7 +518,7 @@ module Pod
       end
 
       def root
-        Pathname.new(@top_specification.defined_in_file).dirname
+        @root ||= Pathname.new(@top_specification.source[:local]).expand_path
       end
 
       def implode

lib/cocoapods/specification.rb

@@ -390,11 +390,7 @@ module Pod
     end
 
     def pod_destroot
-      if local?
-        local_path
-      else
-        config.project_pods_root + top_level_parent.name
-      end
+      config.project_pods_root + top_level_parent.name
     end
 
     def self.pattern_list(patterns)