From 06109151feffa4e0103377775c4de5a5b4f773ae Mon Sep 17 00:00:00 2001
From: "Harish.K" <harish2704@gmail.com>
Date: Wed, 7 Dec 2016 14:30:28 +0530
Subject: [PATCH] Initial commit

---
 README.md    | 82 ++++++++++++++++++++++++++++++++++++++++++++++++++--
 index.js     | 39 +++++++++++++++++++++++++
 package.json | 24 +++++++++++++++
 3 files changed, 143 insertions(+), 2 deletions(-)
 create mode 100644 index.js
 create mode 100644 package.json

diff --git a/README.md b/README.md
index ea8812a..7bb7b8d 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,81 @@
 # 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' } } }
+
+```
+
+
+
+
+
diff --git a/index.js b/index.js
new file mode 100644
index 0000000..f6dc17c
--- /dev/null
+++ b/index.js
@@ -0,0 +1,39 @@
+
+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;
diff --git a/package.json b/package.json
new file mode 100644
index 0000000..94ecf41
--- /dev/null
+++ b/package.json
@@ -0,0 +1,24 @@
+{
+  "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"
+}