All files / common logger.ts

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import winston from 'winston';
 
// Singleton logger instance
let loggerInstance: winston.Logger | null = null;
 
function createLogger(): winston.Logger {
  return winston.createLogger({
    level: process.env.LOG_LEVEL || 'info',
    format: winston.format.combine(
      winston.format.timestamp(),
      winston.format.errors({ stack: true }),
      winston.format.splat(),
      winston.format.printf(({ timestamp, level, message, label, ...meta }) => {
        const labelStr = label ? `[${String(label)}] ` : '';
        const metaStr = Object.keys(meta).length
          ? ` ${JSON.stringify(meta)}`
          : '';
        return `${String(timestamp)} ${labelStr}${String(level)}: ${String(message)}${metaStr}`;
      })
    ),
    transports: [new winston.transports.Console()],
  });
}
 
export function getLogger(label?: string): winston.Logger {
  if (!loggerInstance) {
    loggerInstance = createLogger();
  }
  return loggerInstance.child({ label });
}