create_class_cache

# File lib/rdoc/ri/driver.rb, line 377
  def create_class_cache
    class_cache = OpenStructHash.new

    if(@use_cache)
      # Dump the documentation directories to a file in the cache, so that
      # we only will use the cache for future instantiations with identical
      # documentation directories.
      File.open @cache_doc_dirs_path, "wb" do |fp|
        fp << @doc_dirs.join("\n")
      end
    end

    classes = map_dirs('**/cdesc*.yaml') { |f| Dir[f] }
    warn "Updating class cache with #{classes.size} classes..."
    populate_class_cache class_cache, classes

    write_cache class_cache, class_cache_file_path

    class_cache
  end