Add configurable log directory path

README.md

@@ -68,10 +68,14 @@ Default use will create two log files:
 
 Log files have daily rotation and keeps 3 back copies.
 
-Currently the only supported config options are `name` which configures the log file name and name property of the log entry.
+Currently the only supported config options are:
+
+-`name` which configures the log file name and name property of the log entry.
+-`path` which configures the log directory (relative) to use.
 
       app.use(koaJsonLogger({
-        name: 'myCoolApp'
+        name: 'myCoolApp',
+        path: 'logs'
       }));
 
 When you throw an application error it's best to always use `this.throw`

lib/koa-json-logger.js

@@ -1,6 +1,7 @@
 'use strict';
 
-var bunyan = require('bunyan'),
+var path = require('path'),
+  bunyan = require('bunyan'),
   uuid = require('uuid');
 
 function reqSerializer(ctx) {
@@ -33,7 +34,8 @@ module.exports = function koaLogger(opts) {
 
   opts = opts || {};
 
-  var defaultName = opts.name || 'myapp';
+  var defaultName = opts.name || 'myapp',
+    defaultPath = opts.path || 'log';
 
   // Standard Logger
   // daily rotation
@@ -50,7 +52,7 @@ module.exports = function koaLogger(opts) {
     streams: [
       {
         level: 'info',
-        path: 'log/' + defaultName + '.log',
+        path: path.join(defaultPath, defaultName + '.log'),
         period: '1d',
         count: 3
       }
@@ -74,7 +76,7 @@ module.exports = function koaLogger(opts) {
     streams: [
       {
         level: 'error',
-        path: 'log/' + defaultName + '_error.log',
+        path: path.join(defaultPath, defaultName + '_error.log'),
         period: '1d',
         count: 3
       }