envs

envs
====

Track environment variable usage

Usage
-----

``js
var envs = require('envs');

// enable tracing
env.trace = true;

console.log(envs('NODE_ENV'));
// "production"

console.log(envs('NONEXISTANT', 'my default value'));
// "my default value"

console.log(env.usages);
// { NODE_ENV:
// [ { lineno: '/Users/cameron/Projects/misc/envs/example.js:3:13',
// defaultVal: undefined,
// val: 'production' } ],
// NONEXISTANT:
// [ { lineno: '/Users/cameron/Projects/misc/envs/example.js:6:13',
// defaultVal: 'my default value',
// val: 'my default value' } ] }
`

Testing
-------

`sh
$ npm test
``