Switch from ActiveSupports delegate method to Ruby 1.9+ def_delegator

middleman-core/lib/middleman-core/application.rb

@@ -33,6 +33,8 @@ require 'middleman-core/core_extensions/extensions'
 # Core Middleman Class
 module Middleman
   class Application
+    extend Forwardable
+
     # Global configuration
     include Configuration::Global
 
@@ -57,13 +59,13 @@ module Middleman
     def self.root
       ENV['MM_ROOT'] || Dir.pwd
     end
-    delegate :root, to: :"self.class"
+    def_delegator :"self.class", :root
 
     # Pathname-addressed root
     def self.root_path
       Pathname(root)
     end
-    delegate :root_path, to: :"self.class"
+    def_delegator :"self.class", :root_path
 
     # Name of the source directory
     # @return [String]
@@ -180,7 +182,7 @@ module Middleman
     attr_reader :template_context_class
 
     attr_reader :generic_template_context
-    delegate :link_to, :image_tag, :asset_path, to: :generic_template_context
+    def_delegators :@generic_template_context, :link_to, :image_tag, :asset_path
 
     # Initialize the Middleman project
     def initialize
@@ -242,7 +244,7 @@ module Middleman
       File.join(root, config[:source])
     end
 
-    delegate :instrument, to: ::Middleman::Util
+    def_delegator ::Middleman::Util, :instrument
 
     # Work around this bug: http://bugs.ruby-lang.org/issues/4521
     # where Ruby will call to_s/inspect while printing exception
@@ -256,8 +258,6 @@ module Middleman
     # Hooks clones _hooks from the class to the instance.
     # https://github.com/apotonick/hooks/blob/master/lib/hooks/instance_hooks.rb#L10
     # Middleman expects the same list of hooks for class and instance hooks:
-    def _hooks
-      self.class._hooks
-    end
+    def_delegator :"self.class", :_hooks
   end
 end

middleman-core/lib/middleman-core/config_context.rb

@@ -1,9 +1,11 @@
 module Middleman
   class ConfigContext
+    extend Forwardable
+
     attr_reader :app
 
     # Whitelist methods that can reach out.
-    delegate :config, :logger, :activate, :use, :map, :mime_type, :data, :files, :root, to: :app
+    def_delegators :@app, :config, :logger, :activate, :use, :map, :mime_type, :data, :files, :root
 
     def initialize(app, template_context_class)
       @app = app

middleman-core/lib/middleman-core/configuration.rb

@@ -5,7 +5,7 @@ module Middleman
     module Global
       def self.included(app)
         app.send :extend, ClassMethods
-        app.send :delegate, :config, to: :"self.class"
+        app.send :def_delegator, :"self.class", :config
       end
 
       module ClassMethods

middleman-core/lib/middleman-core/core_extensions/extensions.rb

@@ -16,7 +16,7 @@ module Middleman
         app.config[:autoload_sprockets] = (ENV['AUTOLOAD_SPROCKETS'] == 'true') if ENV['AUTOLOAD_SPROCKETS']
 
         app.extend ClassMethods
-        app.delegate :configure, to: :"self.class"
+        app.def_delegator :"self.class", :configure
       end
 
       module ClassMethods

middleman-core/lib/middleman-core/core_extensions/file_watcher.rb

@@ -53,9 +53,12 @@ module Middleman
 
       # Core File Change API class
       class API
+        extend Forwardable
+
         attr_reader :app
         attr_reader :known_paths
-        delegate :logger, to: :app
+
+        def_delegator :@app, :logger
 
         # Initialize api and internal path cache
         def initialize(app)

middleman-core/lib/middleman-core/core_extensions/i18n.rb

@@ -52,7 +52,7 @@ class Middleman::CoreExtensions::Internationalization < ::Middleman::Extension
     end
   end
 
-  delegate :logger, to: :app
+  def_delegator :@app, :logger
 
   def langs
     @langs ||= known_languages

middleman-core/lib/middleman-core/core_extensions/request.rb

@@ -146,8 +146,9 @@ module Middleman
 
       # Methods to be mixed-in to Middleman::Application
       module InstanceMethods
-        delegate :use, to: :"self.class"
-        delegate :map, to: :"self.class"
+        def self.included(app)
+          app.send :def_delegators, :"self.class", :use, :map
+        end
 
         def call(env)
           dup.call!(env)

middleman-core/lib/middleman-core/extension.rb

@@ -1,4 +1,3 @@
-require 'active_support/core_ext/module/delegation'
 require 'active_support/core_ext/class/attribute'
 require 'middleman-core/configuration'
 
@@ -65,6 +64,8 @@ module Middleman
   #
   # @see http://middlemanapp.com/advanced/custom/ Middleman Custom Extensions Documentation
   class Extension
+    extend Forwardable
+
     # @!attribute supports_multiple_instances
     #   @!scope class
     #   @return [Boolean] whether or not an extension can be activated multiple times, generating multiple instances of the extension.
@@ -175,7 +176,7 @@ module Middleman
     #   @param [Symbol] name The name the extension was registered under
     #   @param [Proc] block A callback to run when the named extension is activated
     #   @return [void]
-    delegate :after_extension_activated, to: :"::Middleman::Extension"
+    def_delegator :"::Middleman::Extension", :after_extension_activated
 
     # Extensions are instantiated when they are activated.
     # @param [Class] klass The Middleman::Application class

middleman-core/lib/middleman-core/file_renderer.rb

@@ -3,11 +3,13 @@ require 'active_support/core_ext/string/output_safety'
 
 module Middleman
   class FileRenderer
+    extend Forwardable
+
     def self.cache
       @_cache ||= ::Tilt::Cache.new
     end
 
-    delegate :cache, to: :"self.class"
+    def_delegator :"self.class", :cache
 
     def initialize(app, path)
       @app = app

middleman-core/lib/middleman-core/preview_server.rb

@@ -8,8 +8,10 @@ module Middleman
     DEFAULT_PORT = 4567
 
     class << self
+      extend Forwardable
+
       attr_reader :app, :host, :port
-      delegate :logger, to: :app
+      def_delegator :app, :logger
 
       # Start an instance of Middleman::Application
       # @return [void]

middleman-core/lib/middleman-core/sitemap/store.rb

@@ -54,7 +54,7 @@ module Middleman
           register_resource_list_manipulator(k, m)
         end
 
-        @app.config_context.class.send :delegate, :sitemap, to: :app
+        @app.config_context.class.send :def_delegator, :app, :sitemap
       end
 
       # Register an object which can transform the sitemap resource list. Best to register

middleman-core/lib/middleman-core/template_context.rb

@@ -11,6 +11,8 @@ module Middleman
   # A new context is created for each render of a path, but that context is shared through
   # the request, passed from template, to layouts and partials.
   class TemplateContext
+    extend Forwardable
+
     # Allow templates to directly access the current app instance.
     # @return [Middleman::Application]
     attr_reader :app
@@ -19,7 +21,7 @@ module Middleman
     attr_accessor :current_engine
 
     # Shorthand references to global values on the app instance.
-    delegate :config, :logger, :sitemap, :server?, :build?, :environment?, :data, :extensions, :source_dir, :root, to: :app
+    def_delegators :@app, :config, :logger, :sitemap, :server?, :build?, :environment?, :data, :extensions, :source_dir, :root
 
     # Initialize a context with the current app and predefined locals and options hashes.
     #
@@ -154,7 +156,7 @@ module Middleman
       file_renderer = ::Middleman::FileRenderer.new(@app, path)
       file_renderer.render(locs, opts, self, &block)
     end
-  
+
     def current_path
       @locs[:current_path]
     end

middleman-core/lib/middleman-core/template_renderer.rb

@@ -5,11 +5,13 @@ require 'middleman-core/file_renderer'
 
 module Middleman
   class TemplateRenderer
+    extend Forwardable
+
     def self.cache
       @_cache ||= ::Tilt::Cache.new
     end
 
-    delegate :cache, to: :"self.class"
+    def_delegator :"self.class", :cache
 
     # Custom error class for handling
     class TemplateNotFound < RuntimeError; end