simplify load process

lib/kaminari.rb

@@ -1,32 +1,18 @@
 module Kaminari
-  def self.frameworks
-    frameworks = []
-    case
-      when rails?   then frameworks << 'rails'
-      when sinatra? then frameworks << 'sinatra/base'
-      when grape?   then frameworks << 'grape'
-    end
-    frameworks
-  end
+end
 
-  def self.load_framework!
-    show_warning if frameworks.empty?
-    frameworks.each do |framework|
-      begin
-        require framework
-      rescue NameError => e
-        raise "Failed to load framework #{framework.inspect}. Have you added it to Gemfile?"
-      end
-    end
-  end
+# load Rails/Railtie
+begin
+  require 'rails'
+rescue LoadError
+  #do nothing
+end
 
-  def self.show_warning
-    $stderr.puts <<-EOC
+$stderr.puts <<-EOC if !defined?(Rails) && !defined?(Sinatra) && !defined?(Grape)
 warning: no framework detected.
 would you check out if your Gemfile appropriately configured?
 ---- e.g. ----
 when Rails:
-    gem 'rails'
     gem 'kaminari'
 
 when Sinatra/Padrino:
@@ -35,49 +21,18 @@ when Sinatra/Padrino:
 when Grape:
     gem 'kaminari', :require => 'kaminari/grape'
 
-    EOC
-  end
+EOC
 
-  def self.load_kaminari!
-    require 'kaminari/config'
-    require 'kaminari/helpers/action_view_extension'
-    require 'kaminari/helpers/paginator'
-    require 'kaminari/models/page_scope_methods'
-    require 'kaminari/models/configuration_methods'
-  end
+# load Kaminari components
+require 'kaminari/config'
+require 'kaminari/helpers/action_view_extension'
+require 'kaminari/helpers/paginator'
+require 'kaminari/models/page_scope_methods'
+require 'kaminari/models/configuration_methods'
+require 'kaminari/hooks'
 
-  def self.hook!
-    load_framework!
-    load_kaminari!
-    require 'kaminari/hooks'
-    if rails?
-      require 'kaminari/railtie'
-      require 'kaminari/engine'
-    elsif sinatra?
-      require 'kaminari/sinatra'
-    elsif grape?
-      require 'kaminari/grape'
-    else
-      Kaminari::Hooks.init!
-    end
-  end
-
-  def self.load!
-    hook!
-  end
-
-  private
-  def self.rails?
-    defined?(::Rails)
-  end
-
-  def self.sinatra?
-    defined?(::Sinatra)
-  end
-
-  def self.grape?
-    defined?(::Grape)
-  end
+# if not using Railtie, call `Kaminari::Hooks.init!` directly
+if defined? Rails
+  require 'kaminari/railtie'
+  require 'kaminari/engine'
 end
-
-Kaminari.load!

lib/kaminari/grape.rb

@@ -1,10 +1,4 @@
-begin
-  require 'grape'
-rescue LoadError
-  raise LoadError, "couldn't load `grape`, check out if appropriately bundled grape gem?"
-end
-
+require 'grape'
 require 'kaminari'
 
 Kaminari::Hooks.init!
-

lib/kaminari/hooks.rb

@@ -6,10 +6,19 @@ module Kaminari
         ::ActiveRecord::Base.send :include, Kaminari::ActiveRecordExtension
       end
 
+      begin; require 'data_mapper'; rescue LoadError; end
+      if defined? ::DataMapper
+        require 'kaminari/models/data_mapper_extension'
+        ::DataMapper::Collection.send :include, Kaminari::DataMapperExtension::Collection
+        ::DataMapper::Model.append_extensions Kaminari::DataMapperExtension::Model
+        # ::DataMapper::Model.send :extend, Kaminari::DataMapperExtension::Model
+      end
+
+      begin; require 'mongoid'; rescue LoadError; end
       if defined? ::Mongoid
         require 'kaminari/models/mongoid_extension'
-        ::Mongoid::Document.send :include, Kaminari::MongoidExtension::Document
         ::Mongoid::Criteria.send :include, Kaminari::MongoidExtension::Criteria
+        ::Mongoid::Document.send :include, Kaminari::MongoidExtension::Document
       end
 
       ActiveSupport.on_load(:mongo_mapper) do
@@ -18,13 +27,6 @@ module Kaminari
         ::Plucky::Query.send :include, Kaminari::PluckyCriteriaMethods
         ::Plucky::Query.send :include, Kaminari::PageScopeMethods
       end
-
-      if defined? ::DataMapper
-        require 'kaminari/models/data_mapper_extension'
-        ::DataMapper::Collection.send :include, Kaminari::DataMapperExtension::Collection
-        ::DataMapper::Model.append_extensions Kaminari::DataMapperExtension::Model
-        # ::DataMapper::Model.send :extend, Kaminari::DataMapperExtension::Model
-      end
       require 'kaminari/models/array_extension'
 
       ActiveSupport.on_load(:action_view) do

lib/kaminari/sinatra.rb

@@ -1,13 +1,5 @@
-begin
-  require 'sinatra/base'
-rescue LoadError
-  raise LoadError, "couldn't load `sinatra/base`, check out if appropriately bundled sinatra gem?"
-end
-
+require 'sinatra/base'
 require 'kaminari'
-module Kaminari::Helpers
-end
 require 'kaminari/helpers/sinatra_helpers'
 
 Kaminari::Hooks.init!
-