* Update Readme

* Update examples
* Version bump

README.md

@@ -38,37 +38,42 @@ hari@hari-VirtualBox:~app$ node xyz.js
 
 ```
 
-#### Override using NODE_ENV
+#### Read additional config based on NODE_ENV variable.
-values from config/production overides the default one
+If we specify NODE_ENV=xyz then, config/xyz.js will overide the values from default.js. **Overriding is a deep merge**
 
 ```bash
 hari@hari-VirtualBox:~app$ env NODE_ENV=production node xyz.js 
-{ port: 5000 }
+{ port: 4000 }
 ```
 
-#### Override using Environtment Variables.
+#### Set any configuration variable using Environtment variable.
+By setting an Environtment variable '<Prefix><key>=<value>', we can set config[key] as value.
 Default prefix is `TC_`
+For eg:
 
-TC_port will set config.port
+  * `TC_port` will set config.port
+
+  * `TC_a.b.c` will set config.a.b.c
 
-TC_a.b.c will set config.a.b.c
 ```bash
 hari@hari-VirtualBox:~app$ env NODE_ENV=production TC_db.mysql.user=root node xyz.js 
 { port: 5000, db: { mysql: { user: 'root' } } }
 ```
 
-#### Override using Environtment Variables. Custom Prefix
+##### Use custom env prefix.
-Prefix can be changed using Environtment variable
+
+default prefix can be changed using Environtment variable by setting `TC_PREFIX` Environtment variable
+
 ```bash
 export TC_PREFIX=MYAPP_
-export MYAPP_PORT=8080
+export MYAPP_port=8080
 hari@hari-VirtualBox:~app$ env MYAPP_db.mysql.user=root node xyz.js 
 { port: 8080, db: { mysql: { user: 'root' } } }
 
 ```
 
 #### use custom config directory
-config directory can be changed using Environtment variable
+config directory can be changed using Environtment variable by setting `CONFIG_DIR` Environtment variable
 ```bash
 hari@hari-VirtualBox:~app$ env CONFIG_DIR=../config TC_PREFIX=MYAPP_ NODE_ENV=production MYAPP_db.mysql.user=root node xyz.js 
 { dir: '../config', db: { mysql: { user: 'root' } } }

example/app/config/default.json

@@ -1,3 +1,7 @@
 {
-	"port":3000
+	"port":3000,
+  "pool":{
+    "min":2,
+    "max":10
+  }
 }

example/app/xyz.js

@@ -1,2 +1,2 @@
 
-console.log( require('tconfig'));
+console.log( require('../../'));

index.js

@@ -40,6 +40,25 @@ function loadConfig( name ){
   return out;
 }
 
+function assignDeep( src, dest1, dest2 ){
+  var key, val;
+  for( key in dest1 ){
+    val = dest1[ key ];
+    if( val.constructor.name === 'Object' ){
+      if( ( !src.hasOwnProperty(key) ) || ( src[ key ].constructor.name !== 'Object' ) ){
+        src[ key ] = {};
+      }
+      assignDeep( src[ key ], val );
+    } else {
+      src[ key ] = val;
+    }
+  }
+  if( dest2 ){
+    assignDeep( src, dest2 );
+  }
+  return src;
+}
+
 /* Implementation of lodash.set function */
 function setProp( object, keys, val ){
   keys = Array.isArray( keys )? keys : keys.split('.');
@@ -50,12 +69,12 @@ function setProp( object, keys, val ){
   object[keys[0]] = val;
 }
 
-Object.assign( finalConfig, loadConfig('default'), loadConfig( env ) );
+assignDeep( finalConfig, loadConfig('default'), loadConfig( env ) );
 
-var envList = Object.keys( process.env ).filter( function(v){
+Object.keys( process.env ).filter( function(v){
   var match = v.match( envRegex );
   if( match ){
-    setProp( finalConfig, match[1].toLowerCase(), process.env[v] );
+    setProp( finalConfig, match[1], process.env[v] );
   }
 });
 

package.json

@@ -1,6 +1,6 @@
 {
   "name": "tconfig",
-  "version": "0.1.1",
+  "version": "0.1.2",
   "description": "A simple transparent config file loader for Nodejs applications. any config field can be overriden using environmen variables",
   "main": "index.js",
   "scripts": {
@@ -20,5 +20,8 @@
   "bugs": {
     "url": "https://github.com/harish2704/tconfig/issues"
   },
-  "homepage": "https://github.com/harish2704/tconfig#readme"
+  "homepage": "https://github.com/harish2704/tconfig#readme",
+  "dependencies": {
+    "lodash.defaultsdeep": "^4.6.0"
+  }
 }