update_ri_cache

# File lib/rubygems/doc_manager.rb, line 63
  def self.update_ri_cache
    load_rdoc rescue return

    return unless defined? RDoc::VERSION # RDoc 1 does not have VERSION

    require 'rdoc/ri/driver'

    options = {
      :use_cache => true,
      :use_system => true,
      :use_site => true,
      :use_home => true,
      :use_gems => true,
      :formatter => RDoc::RI::Formatter,
    }

    RDoc::RI::Driver.new(options).class_cache
  end