@moonset/util/lib/log.ts

Moonset Utils

const winston = require('winston');

export const logger = winston.createLogger({
  level: 'info',
  format: winston.format.json(),
  defaultMeta: {service: 'user-service'},
  transports: [
    //
    // - Write all logs with level `error` and below to `error.log`
    // - Write all logs with level `info` and below to `combined.log`
    //
    new winston.transports.File({
      filename: './build/log/error.log',
      level: 'error',
    }),
    new winston.transports.File({filename: './build/log/combined.log'}),
  ],
});

//
// If we're not in production then log to the `console` with the format:
// `${info.level}: ${info.message} JSON.stringify({ ...rest }) `
//
if (process.env.NODE_ENV !== 'production') {
  logger.add(new winston.transports.Console({
    level: process.env.LOG_LEVEL || 'info',
    format: winston.format.simple(),
  }));
}