scaffold.express.lib.logger.js

var fs = require('fs-extra'),
	path = require('path'),
	bunyan = require('bunyan');

var logDir = path.resolve(path.join('./', 'log'));

fs.ensureDir(logDir);

module.exports = bunyan.createLogger({
	name: 'app-name',
	streams: [
		{
			level: 'debug',
			stream: process.stdout
		},
		{
			level: 'error',
			type: 'rotating-file',
	        path: path.join(logDir, 'error.log'),
	        period: '1d',   // daily rotation
	        count: 3        // keep 3 back copies
		},
		{
			level: 'info',
			type: 'rotating-file',
	        path: path.join(logDir, 'run.log'),
	        period: '1d',   // daily rotation
	        count: 1        // keep 3 back copies
		},
		{
			level: 'debug',
			type: 'rotating-file',
	        path: path.join(logDir, 'debug.log'),
	        period: '1h',
	        count: 3
		}
	]
});