sindresorhus

pify

const processFn = (fn, options) => function (...args) {

	if (!(input !== null && (objType === 'object' || objType === 'function'))) {

		throw new TypeError(`Expected \`input\` to be a \`Function\` or \`Object\`, got \`${input === null ? 'null' : objType}\``);

		const match = pattern => typeof pattern === 'string' ? key === pattern : pattern.test(key);

		return options.include ? options.include.some(match) : !options.exclude.some(match);

		ret = (...args) => options.excludeMain ? input(...args) : processFn(input, options)(...args);

			return options.excludeMain ? input(...args) : processFn(input, options).apply(this, args);

		ret = Object.create(Object.getPrototypeOf(input));

	for (const key in input) { // eslint-disable-line guard-for-in

		ret[key] = typeof property === 'function' && filter(key) ? processFn(property, options) : property;

	"description": "Promisify a callback-style function",

		"optimization-test": "node --allow-natives-syntax optimization-test.js"

# pify [![Build Status](https://travis-ci.org/sindresorhus/pify.svg?branch=master)](https://travis-ci.org/sindresorhus/pify)

		<a href="https://tidelift.com/subscription/pkg/npm-pify?utm_source=npm-pify&utm_medium=referral&utm_campaign=readme">Get professional support for 'pify' with a Tidelift subscription</a>

		Tidelift helps make open source sustainable for maintainers while giving companies<br>assurances about security, maintenance, and licensing for their dependencies.

pify(fs.readFile)('package.json', 'utf8').then(data => {

pify(fs).readFile('package.json', 'utf8').then(data => {

Returns a `Promise` wrapped version of the supplied function or module.

Callback-style function or module whose methods you want to promisify.

By default, the promisified function will only return the second argument from the callback, which works fine for most APIs. This option can be useful for modules like `request` that return multiple arguments. Turning this on will make it return an array of all arguments from the callback, excluding the error argument, instead of just the second argument. This also applies to rejections, where it returns an array of all the callback arguments, including the error.

pify(request, {multiArgs: true})('https://sindresorhus.com').then(result => {

Methods in a module to promisify. Remaining methods will be left untouched.

Methods in a module **not** to promisify. Methods with names ending with `'Sync'` are excluded by default.

If given module is a function itself, it will be promisified. Turn this option on if you want to promisify only methods of the module.

const promiseFn = pify(fn, {excludeMain: true});

		@@ -55,3 +55,5 @@ 'use strict';
		if (objType === 'function') {
		ret = (...args) => options.excludeMain ? input(...args) : processFn(input, options)(...args);
		ret = function (...args) {
		return options.excludeMain ? input(...args) : processFn(input, options).apply(this, args);
		};
		} else {
		@@ -58,0 +60,0 @@ ret = Object.create(Object.getPrototypeOf(input));

		{
		"name": "pify",
		"version": "4.0.0",
		"version": "4.0.1",
		"description": "Promisify a callback-style function",
		@@ -46,7 +46,7 @@ "license": "MIT",
		"devDependencies": {
		"ava": "*",
		"ava": "^0.25.0",
		"pinkie-promise": "^2.0.0",
		"v8-natives": "^1.1.0",
		"xo": "*"
		"xo": "^0.23.0"
		}
		}

		@@ -5,3 +5,17 @@ # pify [![Build Status](https://travis-ci.org/sindresorhus/pify.svg?branch=master)](https://travis-ci.org/sindresorhus/pify)

		---

		<div align="center">
		<b>
		<a href="https://tidelift.com/subscription/pkg/npm-pify?utm_source=npm-pify&utm_medium=referral&utm_campaign=readme">Get professional support for 'pify' with a Tidelift subscription</a>
		</b>
		<br>
		<sub>
		Tidelift helps make open source sustainable for maintainers while giving companies<br>assurances about security, maintenance, and licensing for their dependencies.
		</sub>
		</div>

		---


		## Install
		@@ -8,0 +22,0 @@

Improved metrics