chdir

# File lib/shell.rb, line 144
  def chdir(path = nil)
    if iterator?
      cwd_old = @cwd
      begin
        chdir(path)
        yield
      ensure
        chdir(cwd_old)
      end
    else
      path = "~" unless path
      @cwd = expand_path(path)
      notify "current dir: #{@cwd}"
      rehash
      self
    end
  end