module.exports = function(hljs) {
  var VARIABLE = {
    className: 'variable',
    begin: /\$\(/, end: /\)/,
    contains: [hljs.BACKSLASH_ESCAPE]
  };
  return {
    aliases: ['mk', 'mak'],
    contains: [
      hljs.HASH_COMMENT_MODE,
      {
        begin: /^\w+\s*\W*=/, returnBegin: true,
        relevance: 0,
        starts: {
          className: 'constant',
          end: /\s*\W*=/, excludeEnd: true,
          starts: {
            end: /$/,
            relevance: 0,
            contains: [
              VARIABLE
            ]
          }
        }
      },
      {
        className: 'title',
        begin: /^[\w]+:\s*$/
      },
      {
        className: 'phony',
        begin: /^\.PHONY:/, end: /$/,
        keywords: '.PHONY', lexemes: /[\.\w]+/
      },
      {
        begin: /^\t+/, end: /$/,
        relevance: 0,
        contains: [
          hljs.QUOTE_STRING_MODE,
          VARIABLE
        ]
      }
    ]
  };
};