define subscriptions before other files are required

lib/rspec/core.rb

@@ -1,33 +1,36 @@
-require 'rspec/core/kernel_extensions'
-require 'rspec/core/object_extensions'
-require 'rspec/core/load_path'
-require 'rspec/core/deprecation'
-require 'rspec/core/formatters'
+module RSpec
+  class << self
+    def subscriptions
+      @subscriptions ||= Hash.new {|h,k| h[k] = []}
+    end
 
-require 'rspec/core/hooks'
-require 'rspec/core/subject'
-require 'rspec/core/let'
-require 'rspec/core/metadata'
-require 'rspec/core/pending'
+    # Supported events:
+    #   example_group_started
+    #   example_started
+    #   example_initialized
+    #   example_executed
+    #   example_finished
+    def subscribe(event, &callback)
+      subscriptions[event] << callback
+    end
 
-require 'rspec/core/around_proxy'
-require 'rspec/core/world'
-require 'rspec/core/notifier'
-require 'rspec/core/configuration'
-require 'rspec/core/option_parser'
-require 'rspec/core/configuration_options'
-require 'rspec/core/command_line'
-require 'rspec/core/drb_command_line'
-require 'rspec/core/runner'
-require 'rspec/core/example'
-require 'rspec/core/shared_example_group'
-require 'rspec/core/example_group'
-require 'rspec/core/version'
-require 'rspec/core/errors'
+    def publish(event, *args)
+      subscriptions[event].each {|callback| callback.call(*args)}
+    end
+    def world
+      @world ||= RSpec::Core::World.new
+    end
 
-module RSpec
-  module Core
+    def configuration
+      @configuration ||= RSpec::Core::Configuration.new
+    end
 
+    def configure
+      yield configuration if block_given?
+    end
+  end
+
+  module Core
     def self.install_directory
       @install_directory ||= File.expand_path(File.dirname(__FILE__))
     end
@@ -46,40 +49,35 @@ def self.world
       RSpec.deprecate('RSpec::Core.world', 'RSpec.world', '2.0.0')
       RSpec.world
     end
-
-  end
-
-  def self.world
-    @world ||= RSpec::Core::World.new
-  end
-
-  def self.configuration
-    @configuration ||= RSpec::Core::Configuration.new
-  end
-
-  def self.configure
-    yield configuration if block_given?
-  end
-
-  def self.subscriptions
-    @subscriptions ||= Hash.new {|h,k| h[k] = []}
   end
+end
 
-  # Supported events:
-  #   example_group_started
-  #   example_started
-  #   example_initialized
-  #   example_executed
-  #   example_finished
-  def self.subscribe(event, &callback)
-    subscriptions[event] << callback
-  end
+require 'rspec/core/kernel_extensions'
+require 'rspec/core/object_extensions'
+require 'rspec/core/load_path'
+require 'rspec/core/deprecation'
+require 'rspec/core/formatters'
 
-  def self.publish(event, *args)
-    subscriptions[event].each {|callback| callback.call(*args)}
-  end
-end
+require 'rspec/core/hooks'
+require 'rspec/core/subject'
+require 'rspec/core/let'
+require 'rspec/core/metadata'
+require 'rspec/core/pending'
 
+require 'rspec/core/around_proxy'
+require 'rspec/core/world'
+require 'rspec/core/notifier'
+require 'rspec/core/configuration'
+require 'rspec/core/option_parser'
+require 'rspec/core/configuration_options'
+require 'rspec/core/command_line'
+require 'rspec/core/drb_command_line'
+require 'rspec/core/runner'
+require 'rspec/core/example'
+require 'rspec/core/shared_example_group'
+require 'rspec/core/example_group'
+require 'rspec/core/version'
+require 'rspec/core/errors'
 require 'rspec/core/backward_compatibility'
 
 # TODO - make this configurable with default 'on'