baphomet-js/src/logging.ts

let winston = require('winston');
require('winston-daily-rotate-file');

let errorTransport = new (winston.transports.DailyRotateFile)({
    level: 'error',
    filename: 'log/error-%DATE%.log',
    datePattern: 'YYYY-MM-DD',
    zippedArchive: true,
    maxFiles: '7d'
  });

  let combinedTransport = new (winston.transports.DailyRotateFile)({
    filename: 'log/combined-%DATE%.log',
    datePattern: 'YYYY-MM-DD',
    zippedArchive: true,
    maxFiles: '7d'
  });

let logger = winston.createLogger({
    level: 'info',
    format: winston.format.combine(
        winston.format.timestamp(),
        winston.format.splat(),
        winston.format.simple()
    ),
    defaultMeta: { service: 'baphomet-js' },
    transports: [
        errorTransport,
        combinedTransport
    ]
});

if (process.env.NODE_ENV !== 'production') {
    logger.add(new winston.transports.Console({
        format: winston.format.combine(
            winston.format.colorize(),
            winston.format.simple()
        )
    }));
} else {
    logger.add(new winston.transports.Console({
        level: 'error',
        format: winston.format.combine(
            winston.format.colorize(),
            winston.format.simple()
        )
    }));
}

if ('LOG_LEVEL' in process.env) {
    logger.info('LOG_LEVEL: %s', process.env.LOG_LEVEL)
    logger.level = process.env.LOG_LEVEL
}

export { logger };