Require Node.js 8, add TypeScript definition (#9)

.gitattributes

@@ -1,2 +1 @@
-* text=auto
-*.js text eol=lf
+* text=auto eol=lf

.travis.yml

@@ -1,5 +1,4 @@
 language: node_js
 node_js:
+  - '10'
   - '8'
-  - '6'
-  - '4'

index.d.ts

@@ -0,0 +1,20 @@
+/**
+Get a GitHub username from an email address.
+
+@param email - Email address for the user of whom you want the username.
+@param token - GitHub [personal access token](https://github.com/settings/tokens/new).
+@returns The username for the `email`.
+
+@example
+```
+import githubUsername = require('github-username');
+
+(async () => {
+	console.log(await githubUsername('sindresorhus@gmail.com'));
+	//=> 'sindresorhus'
+})();
+```
+*/
+declare function githubUsername(email: string, token: string): Promise<string>;
+
+export = githubUsername;

index.js

@@ -1,8 +1,8 @@
 'use strict';
 const ghGot = require('gh-got');
 
-function searchCommits(email, token) {
-	return ghGot('search/commits', {
+async function searchCommits(email, token) {
+	const result = await ghGot('search/commits', {
 		token,
 		query: {
 			q: `author-email:${email}`,
@@ -14,37 +14,37 @@ function searchCommits(email, token) {
 			accept: 'application/vnd.github.cloak-preview',
 			'user-agent': 'https://github.com/sindresorhus/github-username'
 		}
-	}).then(result => {
-		const data = result.body;
+	});
 
-		if (data.total_count === 0) {
-			throw new Error(`Couldn't find username for \`${email}\``);
-		}
+	const {body: data} = result;
 
-		return data.items[0].author.login;
-	});
+	if (data.total_count === 0) {
+		throw new Error(`Couldn't find username for \`${email}\``);
+	}
+
+	return data.items[0].author.login;
 }
 
-module.exports = (email, token) => {
+module.exports = async (email, token) => {
 	if (!(typeof email === 'string' && email.includes('@'))) {
-		return Promise.reject(new Error('Email required'));
+		throw new Error('Email required');
 	}
 
-	return ghGot('search/users', {
+	const result = await ghGot('search/users', {
 		token,
 		query: {
 			q: `${email} in:email`
 		},
 		headers: {
 			'user-agent': 'https://github.com/sindresorhus/github-username'
 		}
-	}).then(result => {
-		const data = result.body;
+	});
 
-		if (data.total_count === 0) {
-			return searchCommits(email, token);
-		}
+	const {body: data} = result;
 
-		return data.items[0].login;
-	});
+	if (data.total_count === 0) {
+		return searchCommits(email, token);
+	}
+
+	return data.items[0].login;
 };

index.test-d.ts

@@ -0,0 +1,6 @@
+import {expectType} from 'tsd';
+import githubUsername = require('.');
+
+expectType<Promise<string>>(
+	githubUsername('sindresorhus@gmail.com', 'deadbeef')
+);

package.json

@@ -1,40 +1,39 @@
 {
-  "name": "github-username",
-  "version": "4.1.0",
-  "description": "Get a GitHub username from an email address",
-  "license": "MIT",
-  "repository": "sindresorhus/github-username",
-  "author": {
-    "name": "Sindre Sorhus",
-    "email": "sindresorhus@gmail.com",
-    "url": "sindresorhus.com"
-  },
-  "engines": {
-    "node": ">=4"
-  },
-  "scripts": {
-    "test": "xo && ava"
-  },
-  "files": [
-    "index.js"
-  ],
-  "keywords": [
-    "github",
-    "user",
-    "username",
-    "email",
-    "address",
-    "gh",
-    "git"
-  ],
-  "dependencies": {
-    "gh-got": "^6.0.0"
-  },
-  "devDependencies": {
-    "ava": "*",
-    "xo": "*"
-  },
-  "xo": {
-    "esnext": true
-  }
+	"name": "github-username",
+	"version": "4.1.0",
+	"description": "Get a GitHub username from an email address",
+	"license": "MIT",
+	"repository": "sindresorhus/github-username",
+	"author": {
+		"name": "Sindre Sorhus",
+		"email": "sindresorhus@gmail.com",
+		"url": "sindresorhus.com"
+	},
+	"engines": {
+		"node": ">=8"
+	},
+	"scripts": {
+		"test": "xo && ava && tsd"
+	},
+	"files": [
+		"index.js",
+		"index.d.ts"
+	],
+	"keywords": [
+		"github",
+		"user",
+		"username",
+		"email",
+		"address",
+		"gh",
+		"git"
+	],
+	"dependencies": {
+		"gh-got": "^8.1.0"
+	},
+	"devDependencies": {
+		"ava": "^1.4.1",
+		"tsd": "^0.7.2",
+		"xo": "^0.24.0"
+	}
 }

readme.md

@@ -15,10 +15,10 @@ $ npm install github-username
 ```js
 const githubUsername = require('github-username');
 
-githubUsername('sindresorhus@gmail.com').then(username => {
-	console.log(username);
+(async () => {
+	console.log(await githubUsername('sindresorhus@gmail.com'));
 	//=> 'sindresorhus'
-});
+})();
 ```
 
 

test.js

@@ -1,26 +1,26 @@
 import test from 'ava';
-import m from './';
+import githubUsername from '.';
 
 test('gets GitHub username from email', async t => {
-	t.is(await m('sindresorhus@gmail.com'), 'sindresorhus');
+	t.is(await githubUsername('sindresorhus@gmail.com'), 'sindresorhus');
 });
 
 test('gets GitHub username from email using Commit Search API', async t => {
-	t.is(await m('markdotto@gmail.com'), 'mdo');
+	t.is(await githubUsername('markdotto@gmail.com'), 'mdo');
 });
 
 test('rejects when GitHub has no user for the email', async t => {
-	await t.throws(m('nogithubaccount@example.com'));
+	await t.throwsAsync(githubUsername('nogithubaccount@example.com'));
 });
 
 test('rejects when email is missing', async t => {
-	await t.throws(m());
+	await t.throwsAsync(githubUsername());
 });
 
 test('rejects when email is invalid', async t => {
-	await t.throws(m('sindresorhus_gmail.com'));
+	await t.throwsAsync(githubUsername('sindresorhus_gmail.com'));
 });
 
 test('rejects when email is not a string', async t => {
-	await t.throws(m(() => 'sindresorhus_gmail.com'));
+	await t.throwsAsync(githubUsername(() => 'sindresorhus_gmail.com'));
 });