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node_modules/pify/readme.md

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+# pify [![Build Status](https://travis-ci.org/sindresorhus/pify.svg?branch=master)](https://travis-ci.org/sindresorhus/pify)
+
+> Promisify a callback-style function
+
+
+## Install
+
+```
+$ npm install --save pify
+```
+
+
+## Usage
+
+```js
+const fs = require('fs');
+const pify = require('pify');
+
+// promisify a single function
+
+pify(fs.readFile)('package.json', 'utf8').then(data => {
+	console.log(JSON.parse(data).name);
+	//=> 'pify'
+});
+
+// or promisify all methods in a module
+
+pify(fs).readFile('package.json', 'utf8').then(data => {
+	console.log(JSON.parse(data).name);
+	//=> 'pify'
+});
+```
+
+
+## API
+
+### pify(input, [promiseModule], [options])
+
+Returns a promise wrapped version of the supplied function or module.
+
+#### input
+
+Type: `function`, `object`
+
+Callback-style function or module whose methods you want to promisify.
+
+#### promiseModule
+
+Type: `function`
+
+Custom promise module to use instead of the native one.
+
+Check out [`pinkie-promise`](https://github.com/floatdrop/pinkie-promise) if you need a tiny promise polyfill.
+
+#### options
+
+##### multiArgs
+
+Type: `boolean`  
+Default: `false`
+
+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.
+
+```js
+const request = require('request');
+const pify = require('pify');
+
+pify(request, {multiArgs: true})('https://sindresorhus.com').then(result => {
+	const [httpResponse, body] = result;
+});
+```
+
+##### include
+
+Type: `array` of (`string`|`regex`)
+
+Methods in a module to promisify. Remaining methods will be left untouched.
+
+##### exclude
+
+Type: `array` of (`string`|`regex`)  
+Default: `[/.+Sync$/]`
+
+Methods in a module **not** to promisify. Methods with names ending with `'Sync'` are excluded by default.
+
+##### excludeMain
+
+Type: `boolean`  
+Default: `false`
+
+By default, if given module is a function itself, this function will be promisified. Turn this option on if you want to promisify only methods of the module.
+
+```js
+const pify = require('pify');
+
+function fn() {
+	return true;
+}
+
+fn.method = (data, callback) => {
+	setImmediate(() => {
+		callback(data, null);
+	});
+};
+
+// promisify methods but not fn()
+const promiseFn = pify(fn, {excludeMain: true});
+
+if (promiseFn()) {
+	promiseFn.method('hi').then(data => {
+		console.log(data);
+	});
+}
+```
+
+
+## License
+
+MIT © [Sindre Sorhus](http://sindresorhus.com)