Lotus Application Frameworks Isolation

readme.md

It would be necessary something like:

MyApp::Application.configuration.frameworks << [:controller]
MyApp::Application.load!

This way, we would not load Lotus::View into memory, duplicate and configure it, since we wouldn't be using it.

lotus.patch

diff --git a/lib/lotus/application.rb b/lib/lotus/application.rb
index e730b41..3b1d07c 100644
--- a/lib/lotus/application.rb
+++ b/lib/lotus/application.rb
@@ -1,5 +1,4 @@
 require 'lotus/utils/class_attribute'
-require 'lotus/frameworks'
 require 'lotus/configuration'
 require 'lotus/loader'
 require 'lotus/rendering_policy'
diff --git a/lib/lotus/frameworks.rb b/lib/lotus/frameworks.rb
index 1f12cc5..e69de29 100644
--- a/lib/lotus/frameworks.rb
+++ b/lib/lotus/frameworks.rb
@@ -1,26 +0,0 @@
-require 'lotus/router'
-require 'lotus/controller'
-require 'lotus/view'
-
-module Lotus
-  module Frameworks
-    module Action
-      module Rack
-        protected
-        def response
-          super << self
-        end
-      end
-    end
-  end
-end
-
-Lotus::Action::Rack.class_eval do
-  prepend Lotus::Frameworks::Action::Rack
-end
-
-Lotus::Action.class_eval do
-  def to_rendering
-    exposures.merge(format: format)
-  end
-end
diff --git a/lib/lotus/frameworks/controller.rb b/lib/lotus/frameworks/controller.rb
new file mode 100644
index 0000000..66ef21e
--- /dev/null
+++ b/lib/lotus/frameworks/controller.rb
@@ -0,0 +1,24 @@
+require 'lotus/controller'
+
+module Lotus
+  module Frameworks
+    module Action
+      module Rack
+        protected
+        def response
+          super << self
+        end
+      end
+    end
+  end
+end
+
+Lotus::Action::Rack.class_eval do
+  prepend Lotus::Frameworks::Action::Rack
+end
+
+Lotus::Action.class_eval do
+  def to_rendering
+    exposures.merge(format: format)
+  end
+end
diff --git a/lib/lotus/frameworks/router.rb b/lib/lotus/frameworks/router.rb
new file mode 100644
index 0000000..6037544
--- /dev/null
+++ b/lib/lotus/frameworks/router.rb
@@ -0,0 +1 @@
+require 'lotus/router'
diff --git a/lib/lotus/frameworks/view.rb b/lib/lotus/frameworks/view.rb
new file mode 100644
index 0000000..816bc3a
--- /dev/null
+++ b/lib/lotus/frameworks/view.rb
@@ -0,0 +1 @@
+require 'lotus/view'
diff --git a/lib/lotus/loader.rb b/lib/lotus/loader.rb
index e038d7f..6e1d04c 100644
--- a/lib/lotus/loader.rb
+++ b/lib/lotus/loader.rb
@@ -23,7 +23,6 @@ module Lotus
         load_configuration!
         load_frameworks!
         load_application!
-        finalize!
       end
     end
 
@@ -38,27 +37,39 @@ module Lotus
       config = configuration
 
       unless application_module.const_defined?('Controller')
-        controller = Lotus::Controller.duplicate(application_module) do
-          handle_exceptions config.handle_exceptions
-          default_format    config.default_format
+        if configuration.frameworks.include?(:controller)
+          require "lotus/frameworks/controller"
 
-          modules { include Lotus::Action::Cookies } if config.cookies
-        end
+          controller = Lotus::Controller.duplicate(application_module) do
+            handle_exceptions config.handle_exceptions
+            default_format    config.default_format
+
+            modules { include Lotus::Action::Cookies } if config.cookies
+          end
 
-        application_module.const_set('Controller', controller)
+          application_module.const_set('Controller', controller)
+        end
       end
 
       unless application_module.const_defined?('View')
-        view = Lotus::View.duplicate(application_module) do
-          root   config.templates
-          layout config.layout
-        end
+        if configuration.frameworks.include?(:view)
+          require "lotus/frameworks/view"
+
+          view = Lotus::View.duplicate(application_module) do
+            root   config.templates
+            layout config.layout
+          end
 
-        application_module.const_set('View', view)
+          application_module.const_set('View', view)
+
+          finalize!
+        end
       end
     end
 
     def load_application!
+      return if application.is_a?(Class)
+
       configuration.load_paths.load!(configuration.root)
       load_rack!
     end
@@ -70,7 +81,7 @@ module Lotus
     end
 
     def load_rack!
-      return if application.is_a?(Class)
+      require "lotus/frameworks/router"
 
       namespace = configuration.namespace || application_module