gistfile1.js

  grunt.registerMultiTask('dragon', 'Dragon Rawwr', function () {
    var options = this.options();

    var commentWrap = ['/*!', '!*/'];
    var stringWrap = ['"!!', '!!"'];
    var mediaPrefix = '@media(max-width:1337)//MEDIA';

    var preCompile = function(contents) {
      /* Replace...
        @property "html";
        color: red;
        @property "/html";
      */
      contents = contents.replace(/@property(["a-z0-9 \/]*);/ig, commentWrap[0]+'property$1;'+commentWrap[1]);

      // Replace <xen:xmlsyntax />
      contents = contents.replace(/((<xen:|<\/xen:)[a-z0-9@_ \-\.="'\/]*>)/gi, commentWrap[0]+'$1'+commentWrap[1]);

      // Replace {xen: methods, arg, arg2}
      contents = contents.replace(/(\{xen:[a-z0-9_ \-\.="'@+,*\/]*})/gi, commentWrap[0]+'$1'+commentWrap[1]+stringWrap[0]+stringWrap[1]);

      // @media (max-width something) needs a custom replace due to compiler not playing nice
      contents = contents.replace(/(@media[a-z0-9_ \-\.="'@+,*\{\}\(\):\!*\/]*){[ ]*\n/gi, mediaPrefix+'$1\n{'); // { same line
      contents = contents.replace(/(@media[a-z0-9_ \-\.="'@+,*\{\}\(\):\!*\/]*)/gi, mediaPrefix+'$1'); // { next line

      // xenforo variables need to be strings out
      contents = contents.replace(/@(?!media|keyframes|font-face|import)([a-z\.\-]*)/ig, stringWrap[0]+'@$1'+stringWrap[1]);

      return contents;
    };

    var escapeRegex = function(regex) {
      return regex.replace(/([.?*+^$[\]\\(){}|-])/g, "\\$1");
    }

    var postCompile = function(contents) {
      contents = contents.replace(new RegExp(escapeRegex(commentWrap[0]), 'g'), '');
      contents = contents.replace(new RegExp(escapeRegex(commentWrap[1]), 'g'), '');
      contents = contents.replace(new RegExp(escapeRegex(stringWrap[0]), 'g'), '');
      contents = contents.replace(new RegExp(escapeRegex(stringWrap[1]), 'g'), '');
      contents = contents.replace(new RegExp(escapeRegex(mediaPrefix), 'g'), '');

      return contents;
    };

    var contents = preCompile(grunt.file.read('test.scss'));

    grunt.file.write('test2.css', contents);
    grunt.file.write('test3.css', postCompile(contents));
  });