util.promisify/shim.js

Polyfill/shim for util.promisify in node versions < v8

'use strict';

var util = require('util');
var getPolyfill = require('./polyfill');

module.exports = function shimUtilPromisify() {
	var polyfill = getPolyfill();
	if (polyfill !== util.promisify) {
		Object.defineProperty(util, 'promisify', {
			configurable: true,
			enumerable: true,
			value: polyfill,
			writable: true
		});
	}
	return polyfill;
};