Require Node.js 6

.gitattributes

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

.gitignore

@@ -1 +1,2 @@
 node_modules
+yarn.lock

.npmrc

@@ -0,0 +1 @@
+package-lock=false

.travis.yml

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

index.js

@@ -3,7 +3,7 @@ const execa = require('execa');
 const lcid = require('lcid');
 const mem = require('mem');
 
-const defaultOpts = {spawn: true};
+const defaultOptions = {spawn: true};
 const defaultLocale = 'en_US';
 
 function getEnvLocale(env) {
@@ -20,8 +20,8 @@ function parseLocale(x) {
 	return getEnvLocale(env);
 }
 
-function getLocale(str) {
-	return (str && str.replace(/[.:].*/, ''));
+function getLocale(string) {
+	return (string && string.replace(/[.:].*/, ''));
 }
 
 function getAppleLocale() {
@@ -58,17 +58,16 @@ function getWinLocale() {
 }
 
 function getWinLocaleSync() {
-	const stdout = execa.sync('wmic', ['os', 'get', 'locale']).stdout;
+	const {stdout} = execa.sync('wmic', ['os', 'get', 'locale']);
 	const lcidCode = parseInt(stdout.replace('Locale', ''), 16);
 	return lcid.from(lcidCode);
 }
 
-module.exports = mem(opts => {
-	opts = opts || defaultOpts;
+module.exports = mem((options = defaultOptions) => {
 	const envLocale = getEnvLocale();
-	let thenable;
 
-	if (envLocale || opts.spawn === false) {
+	let thenable;
+	if (envLocale || options.spawn === false) {
 		thenable = Promise.resolve(getLocale(envLocale));
 	} else if (process.platform === 'win32') {
 		thenable = getWinLocale();
@@ -80,12 +79,11 @@ module.exports = mem(opts => {
 		.catch(() => defaultLocale);
 });
 
-module.exports.sync = mem(opts => {
-	opts = opts || defaultOpts;
+module.exports.sync = mem((options = defaultOptions) => {
 	const envLocale = getEnvLocale();
-	let res;
 
-	if (envLocale || opts.spawn === false) {
+	let res;
+	if (envLocale || options.spawn === false) {
 		res = getLocale(envLocale);
 	} else {
 		try {
@@ -94,7 +92,7 @@ module.exports.sync = mem(opts => {
 			} else {
 				res = getUnixLocaleSync();
 			}
-		} catch (err) {}
+		} catch (_) {}
 	}
 
 	return res || defaultLocale;

license

@@ -1,21 +1,9 @@
-The MIT License (MIT)
+MIT License
 
 Copyright (c) Sindre Sorhus <sindresorhus@gmail.com> (sindresorhus.com)
 
-Permission is hereby granted, free of charge, to any person obtaining a copy
-of this software and associated documentation files (the "Software"), to deal
-in the Software without restriction, including without limitation the rights
-to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-copies of the Software, and to permit persons to whom the Software is
-furnished to do so, subject to the following conditions:
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
 
-The above copyright notice and this permission notice shall be included in
-all copies or substantial portions of the Software.
+The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
 
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-THE SOFTWARE.
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

package.json

@@ -10,7 +10,7 @@
     "url": "sindresorhus.com"
   },
   "engines": {
-    "node": ">=4"
+    "node": ">=6"
   },
   "scripts": {
     "test": "xo && ava"
@@ -33,9 +33,9 @@
     "region"
   ],
   "dependencies": {
-    "execa": "^0.7.0",
-    "lcid": "^1.0.0",
-    "mem": "^1.1.0"
+    "execa": "^0.10.0",
+    "lcid": "^2.0.0",
+    "mem": "^3.0.1"
   },
   "devDependencies": {
     "ava": "*",

readme.md

@@ -10,7 +10,7 @@ POSIX systems: The returned locale refers to the [`LC_MESSAGE`](http://www.gnu.o
 ## Install
 
 ```
-$ npm install --save os-locale
+$ npm install os-locale
 ```
 
 
@@ -19,10 +19,10 @@ $ npm install --save os-locale
 ```js
 const osLocale = require('os-locale');
 
-osLocale().then(locale => {
-	console.log(locale);
+(async () => {
+	console.log(await osLocale());
 	//=> 'en_US'
-});
+})();
 ```
 
 

test.js

@@ -6,20 +6,20 @@ const envVars = ['LC_ALL', 'LANGUAGE', 'LANG', 'LC_MESSAGES'];
 const expectedFallback = 'en_US';
 
 function unsetEnvVars(cache) {
-	envVars.forEach(envVar => {
+	for (const envVar of envVars) {
 		if (process.env[envVar]) {
 			cache[envVar] = process.env[envVar];
 			delete process.env[envVar];
 		}
-	});
+	}
 }
 
 function restoreEnvVars(cache) {
-	envVars.forEach(envVar => {
+	for (const envVar of envVars) {
 		if (cache[envVar]) {
 			process.env[envVar] = cache[envVar];
 		}
-	});
+	}
 }
 
 test('async', async t => {