# File lib/rubygems.rb, line 444 def self.ensure_gem_subdirectories dir = Gem.dir require 'fileutils' old_umask = File.umask File.umask old_umask | 022 %w[cache doc gems specifications].each do |name| subdir = File.join dir, name next if File.exist? subdir FileUtils.mkdir_p subdir rescue nil # in case of perms issues -- lame end ensure File.umask old_umask end