module.exports = function(hljs) {
  return {
    case_insensitive: true,
    keywords: {
      flow: 'if else goto for in do call exit not exist errorlevel defined equ neq lss leq gtr geq',
      keyword: 'shift cd dir echo setlocal endlocal set pause copy',
      stream: 'prn nul lpt3 lpt2 lpt1 con com4 com3 com2 com1 aux',
      winutils: 'ping net ipconfig taskkill xcopy ren del'
    },
    contains: [
      {
        className: 'envvar', begin: '%%[^ ]'
      },
      {
        className: 'envvar', begin: '%[^ ]+?%'
      },
      {
        className: 'envvar', begin: '![^ ]+?!'
      },
      {
        className: 'number', begin: '\\b\\d+',
        relevance: 0
      },
      {
        className: 'comment',
        begin: '@?rem', end: '$'
      }
    ]
  };
};