# File lib/multiruby.rb, line 282
  def self.setup_dirs(download = true)
    %w(build install versions tmp).each do |dir|
      unless test ?d, dir then
        puts "creating #{dir}"
        Dir.mkdir dir
        if dir == "versions" && download then
          warn "  Downloading initial ruby tarballs to ~/.multiruby/versions:"
          %w(1.8 1.9).each do |v|
            self.fetch_tar v
          end
          warn "  ...done"
          warn "  Put other ruby tarballs in ~/.multiruby/versions to use them."
        end
      end
    end
  end