import winston from 'winston';
import path from 'path';
const logLevel = process.env.LOG_LEVEL || 'info';
const nodeEnv = process.env.NODE_ENV || 'development';
// Custom format for structured logging
const structuredFormat = winston.format.combine(
winston.format.timestamp(),
winston.format.errors({ stack: true }),
winston.format.metadata({
fillExcept: ['message', 'level', 'timestamp', 'label']
}),
winston.format.json()
);
// Console format for development
const consoleFormat = winston.format.combine(
winston.format.colorize(),
winston.format.timestamp({ format: 'YYYY-MM-DD HH:mm:ss' }),
winston.format.printf(({ timestamp, level, message, label, ...metadata }) => {
let msg = `${timestamp} [${label}] ${level}: ${message}`;
if (Object.keys(metadata).length > 0) {
msg += ` ${JSON.stringify(metadata)}`;
}
return msg;
})
);
// Create logger factory
export const createLogger = (label: string): winston.Logger => {
const transports: winston.transport[] = [];
// Console transport - disabled for MCP mode to avoid stdout/stderr pollution
const isMCPMode = process.env.MCP_MODE === 'true' || process.argv.includes('--mcp');
if (nodeEnv !== 'test' && !isMCPMode) {
transports.push(
new winston.transports.Console({
format: nodeEnv === 'development' ? consoleFormat : structuredFormat,
})
);
}
// File transport for production
if (nodeEnv === 'production') {
const logDir = process.env.LOG_DIR || '/var/log/jamf-mcp-server';
transports.push(
new winston.transports.File({
filename: path.join(logDir, 'error.log'),
level: 'error',
format: structuredFormat,
maxsize: 10485760, // 10MB
maxFiles: 5,
})
);
transports.push(
new winston.transports.File({
filename: path.join(logDir, 'combined.log'),
format: structuredFormat,
maxsize: 10485760, // 10MB
maxFiles: 10,
})
);
}
return winston.createLogger({
level: logLevel,
format: winston.format.combine(
winston.format.label({ label }),
winston.format.timestamp(),
winston.format.errors({ stack: true })
),
transports,
// Don't exit on uncaught errors
exitOnError: false,
});
};
// Default logger for general use
export const logger = createLogger('jamf-mcp-server');
// Log unhandled rejections and exceptions
if (nodeEnv !== 'test') {
process.on('unhandledRejection', (reason, promise) => {
logger.error('Unhandled Rejection at:', { promise, reason });
});
process.on('uncaughtException', (error) => {
logger.error('Uncaught Exception:', error);
// Give the logger time to write before exiting
setTimeout(() => process.exit(1), 1000);
});
}
