chdir

# File lib/shell.rb, line 152
  def chdir(path = nil, verbose = @verbose)
    check_point

    if iterator?
      notify("chdir(with block) #{path}") if verbose
      cwd_old = @cwd
      begin
        chdir(path, nil)
        yield
      ensure
        chdir(cwd_old, nil)
      end
    else
      notify("chdir #{path}") if verbose
      path = "~" unless path
      @cwd = expand_path(path)
      notify "current dir: #{@cwd}"
      rehash
      Void.new(self)
    end
  end