Update the generated Gemfile and config/boot.rb to work with bundler 0.9

railties/lib/generators/rails/app/templates/Gemfile

 # Edit this Gemfile to bundle your application's dependencies.
+source :gemcutter
+
 <% if !dev_or_edge? %>
 gem "rails", "<%= Rails::VERSION::STRING %>"
 <% end -%>

railties/lib/generators/rails/app/templates/config/boot.rb

 # Use Bundler (preferred)
-environment = File.expand_path('../../vendor/gems/environment', __FILE__)
-if File.exist?("#{environment}.rb")
-  require environment
-
-# Use 2.x style vendor/rails and RubyGems
-else
-  vendor_rails = File.expand_path('../../vendor/rails', __FILE__)
-  if File.exist?(vendor_rails)
-    Dir["#{vendor_rails}/*/lib"].each { |path| $:.unshift(path) }
-  end
-
+begin
+  require File.expand_path('../../vendor/environment', __FILE__)
+rescue LoadError
   require 'rubygems'
+  require 'bundler'
+  Bundler.setup
+
+  # To use 2.x style vendor/rails and RubyGems
+  #
+  # vendor_rails = File.expand_path('../../vendor/rails', __FILE__)
+  # if File.exist?(vendor_rails)
+  #   Dir["#{vendor_rails}/*/lib"].each { |path| $:.unshift(path) }
+  # end
+  #
+  # require 'rubygems'
 end
 
 <% unless options[:skip_activerecord] -%>