winston singleton

app.js

'use strict';

const logger = require('./logger');

const util = require('./util');

util.doStuff();

logger.js

'use strict';

const winston = require('winston');

winston.remove(winston.transports.Console);
winston.add(winston.transports.Console, {
  colorize: true,
  json: false,
  level: 'debug'
});

winston.add(winston.transports.File, {
  name: 'file-log',
  filename: 'debug.log',
  json: false,
  level: 'debug'
});

module.exports = winston;

util.js

'use strict';

const logger = require('winston');

module.exports = {
  doStuff() {
    logger.info('oh hi');
  }
};