code: function(cfg, callback) {
    // Input files
    var files = cfg.input_files;
  
    // Output dir
    var outputPath = cfg.output_dir;
  
    if (files.length > 0) {
      new gear.Queue({registry: taskRegistry}) // register tasks
      .log(formatLog('Copying files:', files))
      .copyFiles({input: files, output: outputPath}, callback)
      .log(formatLog('Copied files to: ', outputPath))
      .run(callback);
    } else {
      callback();
    }
  }
docs: Copies files
  
  @param {Object} cfg Build configuration
  @param {Function} callback Task complete callback