index.js

var Log = require('./log');

function convertLogs(event) {
	var LogEvent = {
		event: event.data,
		tags: event.tags
	};

	if (event.request) {
		LogEvent.request = event.request;
	}
	
	if (LogEvent.event instanceof Error) {
		LogEvent.event = LogEvent.event.toString();
	}

	if (LogEvent.tags.indexOf('hapi') !== -1) {
		LogEvent.comp = 'hapi';
		Log.info(LogEvent);
	} else if (LogEvent.tags.indexOf('trace') !== -1) {
		Log.trace(LogEvent);
	} else if (LogEvent.tags.indexOf('debug') !== -1) {
		Log.debug(LogEvent);
	} else if (LogEvent.tags.indexOf('info') !== -1) {
		Log.info(LogEvent);
	} else if (LogEvent.tags.indexOf('warn') !== -1) {
		Log.warn(LogEvent);
	} else if (LogEvent.tags.indexOf('error') !== -1) {
		Log.error(LogEvent);
	} else if (LogEvent.tags.indexOf('fatal') !== -1) {
		Log.fatal(LogEvent);
	} else {
		Log.info(LogEvent);
	}
}

var api = new Hapi.Server();

api.pack.events.on('log', function(event, tags) {
	convertLogs(event);
});

api.pack.events.on('request', function(request, event, tags) {
	convertLogs(event);
});

log.js

'use strict';
var bunyan = require('bunyan');
var stream = require('stream');

function mapLevels(logLevel) {
	switch(logLevel) {
		case 10:
			return 'TRACE';
		case 20:
			return 'DEBUG';
		case 30:
			return 'INFO';
		case 40:
			return 'WARN';
		case 50:
			return 'ERROR';
		case 60:
			return 'FATAL';
		default:
			return "UNKNOWN";
	}

}

var prettyStream = new stream.Writable();
prettyStream._write = function(chunk, encoding, callback) {
	try {
		var logObj = JSON.parse(chunk.toString());
		var msg = logObj.msg;
		if (!msg || msg === '') {
			msg = logObj.event;
		}

		if (!msg) {
			return callback();
		}

		var comp = logObj.name;
		if (logObj.comp) {
			comp = logObj.comp;
		}

		if (logObj.request) {
			if (msg.method) {
				console.log('[' + comp + ']','[' + mapLevels(logObj.level) + ']', '[' + logObj.request + ']', msg.method, msg.url);
			} else {
				console.log('[' + comp + ']','[' + mapLevels(logObj.level) + ']', '[' + logObj.request + ']', msg);
			}
		} else {
			console.log('[' + comp + ']','[' + mapLevels(logObj.level) + ']', msg);
		}
	} catch (err) {
		console.error(err);
	}
	callback();
};

var log = bunyan.createLogger(
{
	name: 'yourname',
	streams: [
		{
			path: 'yourlog.log'
		},
		{
			stream: prettyStream,
			level: 'trace'
		}
	]
});

module.exports = log;