class Utils::ConfigFile::SshTunnel

def copy_paste(enable = false, &block)
  if @copy_paste
    @copy_paste
  else
    if block
      @copy_paste = CopyPaste.new(&block)
    elsif enable
      @copy_paste = CopyPaste.new {}
    end
  end
end

def initialize
  super
  self.terminal_multiplexer = terminal_multiplexer
end

def multiplexer_attach(session)
  case @multiplexer
  when 'screen'
    'screen -DUR "%s"' % session
  when 'tmux'
    'tmux -u attach -d -t "%s"' % session
  end
end

def multiplexer_list
  case @multiplexer
  when 'screen'
    'screen -ls'
  when 'tmux'
    'tmux ls'
  end
end

def multiplexer_new(session)
  case @multiplexer
  when 'screen'
    'false'
  when 'tmux'
    'tmux -u new -s "%s"' % session
  end
end

def terminal_multiplexer=(terminal_multiplexer)
  @multiplexer = terminal_multiplexer.to_s
  @multiplexer =~ /\A(screen|tmux)\z/ or
    fail "invalid terminal_multiplexer #{terminal_multiplexer.inspect} was configured"
end