caller

#### caller

Figure out your caller (thanks to @substack).

##### Initialization Time Caller
``javascript
// foo.js

var bar = require('bar');
`

`javascript
// bar.js

var caller = require('caller');
console.log(caller()); // /path/to/foo.js
`

##### Runtime Caller
`javascript
// foo.js

var bar = require('bar');
bar.doWork();
`

`javascript
// bar.js

var caller = require('caller');

exports.doWork = function () {
console.log(caller()); // /path/to/foo.js
};
`

$3

Caller also accepts a depth argument for tracing back further (defaults to 1).

`javascript
// foo.js

var bar = require('bar');
bar.doWork();
`

`javascript
// bar.js

var baz = require('baz');

exports.doWork = function () {
baz.doWork();
};
`

`javascript
// baz.js

var caller = require('caller');

exports.doWork = function () {
console.log(caller(2)); // /path/to/foo.js
};
``