Logger Library with winston - Fixed for additional log arguments

logger.js

var app = require(process.cwd() + '/app');
var winston = require('winston');

// Set up logger
var customColors = {
  trace: 'white',
  debug: 'green',
  info: 'green',
  warn: 'yellow',
  crit: 'red',
  fatal: 'red'
};

var logger = new(winston.Logger)({
  colors: customColors,
  levels: {
    fatal: 0,
    crit: 1,
    warn: 2,
    info: 3,
    debug: 4,
    trace: 5
  },
  transports: [
  new(winston.transports.Console)({
    level: app.settings.logLevel,
    colorize: true,
    timestamp: true
  })
  // new (winston.transports.File)({ filename: 'somefile.log' })
  ]
});

winston.addColors(customColors);

// Extend logger object to properly log 'Error' types
var origLog = logger.log;

logger.log = function (level, msg) {
  if (msg instanceof Error) {
    var args = Array.prototype.slice.call(arguments);
    args[1] = msg.stack;
    origLog.apply(logger, args);
  } else {
    origLog.apply(logger, arguments);
  }
};
/* LOGGER EXAMPLES
    app.logger.trace('testing');
    app.logger.debug('testing');
    app.logger.info('testing');
    app.logger.warn('testing');
    app.logger.crit('testing');
    app.logger.fatal('testing');
    */

module.exports = logger;