index.js

var es = require('event-stream');
var colors = require('colors');

module.exports = function(subString, opt) {

  var substrings = typeof subString === "undefined" ? [] : subString;
  opt = opt || {};

  function occurrences(file,cb){

      // file.contents = new Buffer(String(file.contents).toString());
      if (file.isNull()) {
         // Do nothing if no contents
      }

      if (file.isBuffer()) {
        var string = file.contents.toString();
        string = string.toString('utf8').split(/\r\n|[\n\r\u0085\u2028\u2029]/g);
        var message = "";
        var m = 0;
        var n=0, pos=0;
        var sc = 0;
        while(sc < string.length){
          for (var i = substrings.length - 1; i >= 0; i--) {
            var step=substrings[i].length;

            pos=string[sc].indexOf(substrings[i],pos);
            if(pos>=0){
              n++;
              message = message + "    "+ "["+(sc+1)+"] "+ substrings[i] + " ,\n";
            };
          };
          sc++;
        }
        m = m + n;

        var finalMessage = file.path+" ("+m+")\n" + message;
        if (m === 0) {
          if (opt && opt.logLevel !== 'warn') {
            console.log(finalMessage[opt.color || 'green']);
          }
        } else {
          console.log(finalMessage[opt.color || 'red']);
        }
        message = "";
        cb(null,file);
      }
  }

  return es.map(occurrences);

};