Fix ruby-grape#383: Inherit settings correctly when performing nested…

… mounts

lib/grape/api.rb

@@ -304,6 +304,13 @@ def mount(mounts)
             app_settings.set :mount_path, mount_path
             app.inherit_settings(app_settings)
           end
+          if app.respond_to?(:endpoints, true) # nested mounts
+            app.endpoints.each do |endpoint|
+              if endpoint.options[:app].respond_to?(:inherit_settings, true)
+                endpoint.options[:app].inherit_settings(settings.clone)
+              end
+            end
+          end
           endpoints << Grape::Endpoint.new(settings.clone, {
             :method => :any,
             :path => path,

spec/grape/api_spec.rb

@@ -1720,6 +1720,23 @@ def self.call(object, env)
         last_response.body.should == 'yo'
       end
 
+      it 'applies the settings to nested mounted apis' do
+        subject.version 'v1', :using => :path
+
+        subject.namespace :cool do
+          inner_app = Class.new(Grape::API)
+          inner_app.get('/awesome') do
+            "yo"
+          end
+          app = Class.new(Grape::API)
+          app.mount inner_app
+          mount app
+        end
+
+        get '/v1/cool/awesome'
+        last_response.body.should == 'yo'
+      end
+
       it 'inherits rescues even when some defined by mounted' do
         subject.rescue_from :all do |e|
           rack_response("rescued from #{e.message}", 202)