Using Async to parse many metrics log files

async-parse-metrics_txt.js

var populateMetrics = function() {
  metricsFiles = [];

  var addMetric = function(file, callback) {
      fs.stat(path + '/' + file, function(err, stats) {
        if(stats.isDirectory()) {
          fs.stat(path + '/' + file + '/Metrics.txt', function(err, stats) {
            if(err) {
              callback();
            } else {
              metricsFiles.push(path + '/' + file + '/Metrics.txt');
              callback();
            }
          })
        } else callback();
      });    
  };

  fs.readdir(path, function(err, files) {
    if(err) console.log(err);

    async.forEach(files, addMetric, function(err) {
      if(err) console.log(err);
      console.log('************************\n' + metricsFiles.length + ' metric files found');
      scanMetrics();
    });
  });
};