Monkey patch to make ruby exit codes work with continuous integration

exit_code_patch.rb

# Monkey Patch ruby because of a bug introduced in ruby versions greater than 1.9.2
# For some reason the exit code is all wrong in later version of ruby and even though
# the issue was closed as sorted it's still broken in ruby version 1.9.3-p194.
# (see  http://redmine.ruby-lang.org/issues/5218 for more information)
# Put this in spec_helper.rb or test_helper.rb so that it only affects specs and the CI server.
if defined?(RUBY_ENGINE) && RUBY_ENGINE == "ruby" && RUBY_VERSION >= "1.9"
  module Kernel
    alias :__at_exit :at_exit
    def at_exit(&block)
      __at_exit do
        exit_status = $!.status if $!.is_a?(SystemExit)
        block.call
        exit exit_status if exit_status
      end
    end
  end
end