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'use strict';


/**
 * Module wrapper of @substack's `caller.js`
 * @original: https://github.com/substack/node-resolve/blob/master/lib/caller.js
 * @blessings: https://twitter.com/eriktoth/statuses/413719312273125377
 * @see https://code.google.com/p/v8/wiki/JavaScriptStackTraceApi
 */
module.exports = function () {
    var pst, stack, file, frame;

    pst = Error.prepareStackTrace;
    Error.prepareStackTrace = function (_, stack) {
        Error.prepareStackTrace = pst;
        return stack;
    };

    stack = (new Error()).stack;
    stack = stack.slice(2);

    do {
        frame = stack.shift();
        file = frame && frame.getFileName()
    } while (stack.length && file === 'module.js');

    return file;
};