Builder unbundle message directs to Bulk updating Gem source index for: http://gems.rubyforge.org

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@7789 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

activesupport/lib/active_support.rb

@@ -25,6 +25,13 @@ $:.unshift(File.dirname(__FILE__))
 $:.unshift(File.dirname(__FILE__) + "/active_support/vendor")
 
 require 'rubygems'
+begin
+  require 'builder'
+rescue LoadError
+  $stderr.puts 'Builder has been unbundled from Active Support in Rails 2.0.'
+  $stderr.puts 'Please `gem install builder`'
+  raise
+end
 
 require 'active_support/basic_object'