Initial commit

README.md

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 # tconfig
-A simple transparent config file loader for Nodejs applications.
-any config field can be overriden using environmen variables
+A simple and transparent config file loader for Nodejs applications.
+
+
+## install
+```bash
+npm i tconfig
+```
+## Usage
+```javascript
+const conig = require('tconfig');
+
+console.log( config ); // your config object
+```
+
+## Examples
+
+```javascript
+// file: xyz.js
+
+/*
+▾ app/
+    ▾ config/
+       default.js     // port = 3000
+       production.js  // port = 4000
+    xyz.js
+    package.json
+*/
+
+
+console.log( require('tconfig') );
+```
+
+#### Simple case
+```bash
+hari@hari-VirtualBox:~app$ node xyz.js 
+{ port: 3000 }
+
+```
+
+#### Override using NODE_ENV
+values from config/production overides the default one
+
+```bash
+hari@hari-VirtualBox:~app$ env NODE_ENV=production node xyz.js 
+{ port: 5000 }
+```
+
+#### Override using Environtment Variables.
+Default prefix is `TC_`
+
+TC_port will set config.port
+
+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
+Prefix can be changed using Environtment variable
+```bash
+export TC_PREFIX=MYAPP_
+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
+```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' } } }
+
+```
+
+
+
+
+

index.js

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+
+var  path = require('path');
+var configDIR = process.env.CONFIG_DIR || path.resolve( path.join( require.main.paths[0], '..', 'config' ) );
+var env = ( process.env.NODE_ENV || 'development' ).toLowerCase();
+var envPrefix = process.env.TC_PREFIX || 'TC_';
+var envRegex = new RegExp( '^' + envPrefix + '(.*)' );
+var finalConfig = {};
+
+function loadConfig( name ){
+  var out = {};
+  try{
+    out = require( configDIR + '/' + name );
+  } catch(e){
+    out = {};
+  }
+  return out;
+}
+
+/* Implementation of lodash.set function */
+function setProp( object, keys, val ){
+  keys = Array.isArray( keys )? keys : keys.split('.');
+  if( keys.length>1 ){
+    object[keys[0]] = object[keys[0]] || {};
+    return setProp( object[keys[0]], keys.slice(1), val );
+  }
+  object[keys[0]] = val;
+}
+
+Object.assign( finalConfig, loadConfig('default'), loadConfig( env ) );
+
+var envList = Object.keys( process.env ).filter( function(v){
+  var match = v.match( envRegex );
+  if( match ){
+    setProp( finalConfig, match[1].toLowerCase(), process.env[v] );
+  }
+});
+
+
+module.exports = finalConfig;

package.json

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+{
+  "name": "tconfig",
+  "version": "0.0.1",
+  "description": "A simple transparent config file loader for Nodejs applications. any config field can be overriden using environmen variables",
+  "main": "index.js",
+  "scripts": {
+    "test": "mocha -R spec"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/harish2704/tconfig.git"
+  },
+  "keywords": [
+    "config",
+    "env",
+    "override"
+  ],
+  "author": "Harish.K <harish2704@gmail.com>",
+  "license": "MIT",
+  "bugs": {
+    "url": "https://github.com/harish2704/tconfig/issues"
+  },
+  "homepage": "https://github.com/harish2704/tconfig#readme"
+}