replace system files with a new one

Rakefile

@@ -1,10 +1,7 @@
 # Add your own tasks in files placed in lib/tasks ending in .rake,
 # for example lib/tasks/capistrano.rake, and they will automatically be available to Rake.
 
-require(File.join(File.dirname(__FILE__), 'config', 'boot'))
-
+require File.expand_path('../config/application', __FILE__)
 require 'rake'
-require 'rake/testtask'
-require 'rake/rdoctask'
 
-require 'tasks/rails'
+Rubykaigi::Application.load_tasks

config/boot.rb

@@ -1,128 +1,6 @@
-# Don't change this file!
-# Configure your app in config/environment.rb and config/environments/*.rb
+require 'rubygems'
 
-RAILS_ROOT = "#{File.dirname(__FILE__)}/.." unless defined?(RAILS_ROOT)
+# Set up gems listed in the Gemfile.
+ENV['BUNDLE_GEMFILE'] ||= File.expand_path('../../Gemfile', __FILE__)
 
-module Rails
-  class << self
-    def boot!
-      unless booted?
-        preinitialize
-        pick_boot.run
-      end
-    end
-
-    def booted?
-      defined? Rails::Initializer
-    end
-
-    def pick_boot
-      (vendor_rails? ? VendorBoot : GemBoot).new
-    end
-
-    def vendor_rails?
-      File.exist?("#{RAILS_ROOT}/vendor/rails")
-    end
-
-    def preinitialize
-      load(preinitializer_path) if File.exist?(preinitializer_path)
-    end
-
-    def preinitializer_path
-      "#{RAILS_ROOT}/config/preinitializer.rb"
-    end
-  end
-
-  class Boot
-    def run
-      load_initializer
-      Rails::Initializer.run(:set_load_path)
-    end
-  end
-
-  class VendorBoot < Boot
-    def load_initializer
-      require "#{RAILS_ROOT}/vendor/rails/railties/lib/initializer"
-      Rails::Initializer.run(:install_gem_spec_stubs)
-      Rails::GemDependency.add_frozen_gem_path
-    end
-  end
-
-  class GemBoot < Boot
-    def load_initializer
-      self.class.load_rubygems
-      load_rails_gem
-      require 'initializer'
-    end
-
-    def load_rails_gem
-      if version = self.class.gem_version
-        gem 'rails', version
-      else
-        gem 'rails'
-      end
-    rescue Gem::LoadError => load_error
-      $stderr.puts %(Missing the Rails #{version} gem. Please `gem install -v=#{version} rails`, update your RAILS_GEM_VERSION setting in config/environment.rb for the Rails version you do have installed, or comment out RAILS_GEM_VERSION to use the latest version installed.)
-      exit 1
-    end
-
-    class << self
-      def rubygems_version
-        Gem::RubyGemsVersion rescue nil
-      end
-
-      def gem_version
-        if defined? RAILS_GEM_VERSION
-          RAILS_GEM_VERSION
-        elsif ENV.include?('RAILS_GEM_VERSION')
-          ENV['RAILS_GEM_VERSION']
-        else
-          parse_gem_version(read_environment_rb)
-        end
-      end
-
-      def load_rubygems
-        min_version = '1.3.2'
-        require 'rubygems'
-        unless rubygems_version >= min_version
-          $stderr.puts %Q(Rails requires RubyGems >= #{min_version} (you have #{rubygems_version}). Please `gem update --system` and try again.)
-          exit 1
-        end
-
-      rescue LoadError
-        $stderr.puts %Q(Rails requires RubyGems >= #{min_version}. Please install RubyGems and try again: http://rubygems.rubyforge.org)
-        exit 1
-      end
-
-      def parse_gem_version(text)
-        $1 if text =~ /^[^#]*RAILS_GEM_VERSION\s*=\s*["']([!~<>=]*\s*[\d.]+)["']/
-      end
-
-      private
-        def read_environment_rb
-          File.read("#{RAILS_ROOT}/config/environment.rb")
-        end
-    end
-  end
-end
-
-class Rails::Boot
-  def run
-    load_initializer
-    extend_environment
-    Rails::Initializer.run(:set_load_path)
-  end
-
-  def extend_environment
-    Rails::Initializer.class_eval do
-      old_load = instance_method(:load_environment)
-      define_method(:load_environment) do
-        Bundler.require :default, Rails.env
-        old_load.bind(self).call
-      end
-    end
-  end
-end
-
-# All that for this:
-Rails.boot!
+require 'bundler/setup' if File.exists?(ENV['BUNDLE_GEMFILE'])