Fallback to apipie views when application override isn't present

Before this change apipie-rails required all views to be copied into the
application's view folder even when only one of the files contained some
modification. After this change it is possible to override just a single
view.

Author: Tomas Strachota

lib/tasks/apipie.rake

@@ -100,17 +100,14 @@ namespace :apipie do
   # Attempt to use the Rails application views, otherwise default to built in views
   def renderer
     return @apipie_renderer if @apipie_renderer
-    base_path = if File.directory?("#{Rails.root}/app/views/apipie/apipies")
-                  "#{Rails.root}/app/views/apipie/apipies"
-                else
-                  File.expand_path("../../../app/views/apipie/apipies", __FILE__)
-                end
-    layouts_path = if File.directory?("#{Rails.root}/app/views/layouts/apipie")
-                     "#{Rails.root}/app/views/layouts"
-                   else
-                     File.expand_path("../../../app/views/layouts", __FILE__)
-                   end
-    @apipie_renderer = ActionView::Base.new([base_path, layouts_path])
+
+    base_paths = [File.expand_path("../../../app/views/apipie/apipies", __FILE__)]
+    base_paths.unshift("#{Rails.root}/app/views/apipie/apipies") if File.directory?("#{Rails.root}/app/views/apipie/apipies")
+
+    layouts_paths = [File.expand_path("../../../app/views/layouts", __FILE__)]
+    layouts_paths.unshift("#{Rails.root}/app/views/layouts") if File.directory?("#{Rails.root}/app/views/layouts/apipie")
+
+    @apipie_renderer = ActionView::Base.new(base_paths + layouts_paths)
     @apipie_renderer.singleton_class.send(:include, ApipieHelper)
     return @apipie_renderer
   end