text: var moment = require('moment');
  var through = require('through2');
  var path = require('path');
  
  module.exports = function(options){
    return through.obj(function(obj, enc, cb){
      
      options || (options = {});
      
      var format = options.f || options.format || 'YYYYMMDD-HHmm';
  
      var workingPath = obj.newPath || obj.oldPath;
      var dirname = path.dirname(workingPath);
      var extname = path.extname(workingPath);
      var basename = path.basename(workingPath, extname);
  
      this.push({
        oldPath: obj.oldPath,
        newPath: path.join(
          dirname,
          basename + '.' + moment().format(format) + extname
        )
      });
  
      cb();
    });
  };