Require Node.js 16 and move to ESM

Fixes #10

.github/workflows/main.yml

@@ -10,13 +10,12 @@ jobs:
       fail-fast: false
       matrix:
         node-version:
-          - 14
-          - 12
-          - 10
-          - 8
+          - 20
+          - 18
+          - 16
     steps:
-      - uses: actions/checkout@v2
-      - uses: actions/setup-node@v1
+      - uses: actions/checkout@v3
+      - uses: actions/setup-node@v3
         with:
           node-version: ${{ matrix.node-version }}
       - run: npm install

index.d.ts

@@ -3,7 +3,7 @@ Check if the process is running inside [Windows Subsystem for Linux](https://msd
 
 @example
 ```
-import isWsl = require('is-wsl');
+import isWsl from 'is-wsl';
 
 // When running inside Windows Subsystem for Linux
 console.log(isWsl);
@@ -12,4 +12,4 @@ console.log(isWsl);
 */
 declare const isWsl: boolean;
 
-export = isWsl;
+export default isWsl;

index.js

@@ -1,7 +1,7 @@
-'use strict';
-const os = require('os');
-const fs = require('fs');
-const isDocker = require('is-docker');
+import process from 'node:process';
+import os from 'node:os';
+import fs from 'node:fs';
+import isDocker from 'is-docker';
 
 const isWsl = () => {
 	if (process.platform !== 'linux') {
@@ -17,15 +17,11 @@ const isWsl = () => {
 	}
 
 	try {
-		return fs.readFileSync('/proc/version', 'utf8').toLowerCase().includes('microsoft') ?
-			!isDocker() : false;
-	} catch (_) {
+		return fs.readFileSync('/proc/version', 'utf8').toLowerCase().includes('microsoft')
+			? !isDocker() : false;
+	} catch {
 		return false;
 	}
 };
 
-if (process.env.__IS_WSL_TEST__) {
-	module.exports = isWsl;
-} else {
-	module.exports = isWsl();
-}
+export default process.env.__IS_WSL_TEST__ ? isWsl : isWsl();

index.test-d.ts

@@ -1,4 +1,4 @@
 import {expectType} from 'tsd';
-import isWsl = require('.');
+import isWsl from './index.js';
 
 expectType<boolean>(isWsl);

license

@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) Sindre Sorhus <sindresorhus@gmail.com> (sindresorhus.com)
+Copyright (c) Sindre Sorhus <sindresorhus@gmail.com> (https://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:
 

package.json

@@ -10,8 +10,13 @@
 		"email": "sindresorhus@gmail.com",
 		"url": "https://sindresorhus.com"
 	},
+	"type": "module",
+	"exports": {
+		"types": "./index.d.ts",
+		"default": "./index.js"
+	},
 	"engines": {
-		"node": ">=8"
+		"node": ">=16"
 	},
 	"scripts": {
 		"test": "xo && ava && tsd"
@@ -34,13 +39,19 @@
 		"is"
 	],
 	"dependencies": {
-		"is-docker": "^2.0.0"
+		"is-docker": "^3.0.0"
 	},
 	"devDependencies": {
-		"ava": "^1.4.1",
-		"clear-module": "^3.2.0",
-		"proxyquire": "^2.1.0",
-		"tsd": "^0.7.2",
-		"xo": "^0.24.0"
+		"ava": "^5.3.1",
+		"esmock": "^2.3.6",
+		"tsd": "^0.28.1",
+		"xo": "^0.55.1"
+	},
+	"ava": {
+		"serial": true,
+		"nodeArguments": [
+			"--loader=esmock",
+			"--no-warnings"
+		]
 	}
 }

readme.md

@@ -6,28 +6,16 @@ Can be useful if you need to work around unimplemented or buggy features in WSL.
 
 ## Install
 
-```
-$ npm install is-wsl
+```sh
+npm install is-wsl
 ```
 
 ## Usage
 
 ```js
-const isWsl = require('is-wsl');
+import isWsl from 'is-wsl';
 
 // When running inside Windows Subsystem for Linux
 console.log(isWsl);
 //=> true
 ```
-
----
-
-<div align="center">
-	<b>
-		<a href="https://tidelift.com/subscription/pkg/npm-is-wsl?utm_source=npm-is-wsl&utm_medium=referral&utm_campaign=readme">Get professional support for this package 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>

test.js

@@ -1,21 +1,19 @@
+import process from 'node:process';
 import test from 'ava';
-import proxyquire from 'proxyquire';
-import clearModule from 'clear-module';
+import esmock from 'esmock';
 
-test.beforeEach(() => {
-	clearModule('.');
-});
+const requireFresh = modulePath => import(`${modulePath}?cacheBust=${Date.now()}`);
 
-test('inside WSL 1', t => {
+test('inside WSL 1', async t => {
 	process.env.__IS_WSL_TEST__ = true;
 
 	const originalPlatform = process.platform;
 	Object.defineProperty(process, 'platform', {value: 'linux'});
 
-	const isWsl = proxyquire('.', {
+	const isWsl = await esmock('./index.js', {
 		fs: {
-			readFileSync: () => 'Linux version 3.4.0-Microsoft (Microsoft@Microsoft.com) (gcc version 4.7 (GCC) ) #1 SMP PREEMPT Wed Dec 31 14:42:53 PST 2014'
-		}
+			readFileSync: () => 'Linux version 3.4.0-Microsoft (Microsoft@Microsoft.com) (gcc version 4.7 (GCC) ) #1 SMP PREEMPT Wed Dec 31 14:42:53 PST 2014',
+		},
 	});
 
 	t.true(isWsl());
@@ -24,16 +22,16 @@ test('inside WSL 1', t => {
 	Object.defineProperty(process, 'platform', {value: originalPlatform});
 });
 
-test('inside WSL 2', t => {
+test('inside WSL 2', async t => {
 	process.env.__IS_WSL_TEST__ = true;
 
 	const originalPlatform = process.platform;
 	Object.defineProperty(process, 'platform', {value: 'linux'});
 
-	const isWsl = proxyquire('.', {
+	const isWsl = await esmock('./index.js', {
 		fs: {
-			readFileSync: () => 'Linux version 4.19.43-microsoft-standard (oe-user@oe-host) (gcc version 7.3.0 (GCC)) #1 SMP Mon May 20 19:35:22 UTC 2019'
-		}
+			readFileSync: () => 'Linux version 4.19.43-microsoft-standard (oe-user@oe-host) (gcc version 7.3.0 (GCC)) #1 SMP Mon May 20 19:35:22 UTC 2019',
+		},
 	});
 
 	t.true(isWsl());
@@ -42,32 +40,33 @@ test('inside WSL 2', t => {
 	Object.defineProperty(process, 'platform', {value: originalPlatform});
 });
 
-test('not inside WSL', t => {
+test('not inside WSL', async t => {
 	process.env.__IS_WSL_TEST__ = true;
 
 	const originalPlatform = process.platform;
 	Object.defineProperty(process, 'platform', {value: 'darwin'});
 
-	const isWsl = require('.');
+	const {default: isWsl} = await requireFresh('./index.js');
+
 	t.false(isWsl());
 
 	delete process.env.__IS_WSL_TEST__;
 	Object.defineProperty(process, 'platform', {value: originalPlatform});
 });
 
-test('not inside WSL, but inside Linux', t => {
+test('not inside WSL, but inside Linux', async t => {
 	process.env.__IS_WSL_TEST__ = true;
 
 	const originalPlatform = process.platform;
 	Object.defineProperty(process, 'platform', {value: 'linux'});
 
-	const isWsl = proxyquire('.', {
+	const isWsl = await esmock('./index.js', {
 		fs: {
-			readFileSync: () => 'Linux version 4.19.43-standard (oe-user@oe-host) (gcc version 7.3.0 (GCC)) #1 SMP Mon May 20 19:35:22 UTC 2019'
+			readFileSync: () => 'Linux version 4.19.43-standard (oe-user@oe-host) (gcc version 7.3.0 (GCC)) #1 SMP Mon May 20 19:35:22 UTC 2019',
 		},
 		os: {
-			release: () => ''
-		}
+			release: () => '',
+		},
 	});
 
 	t.false(isWsl());
@@ -76,20 +75,20 @@ test('not inside WSL, but inside Linux', t => {
 	Object.defineProperty(process, 'platform', {value: originalPlatform});
 });
 
-test('inside WSL, but inside docker', t => {
+test('inside WSL, but inside docker', async t => {
 	process.env.__IS_WSL_TEST__ = true;
 
 	const originalPlatform = process.platform;
 	Object.defineProperty(process, 'platform', {value: 'linux'});
 
-	const isWsl = proxyquire('.', {
+	const isWsl = await esmock('./index.js', {
 		fs: {
-			readFileSync: () => 'Linux version 4.19.43-microsoft-standard (oe-user@oe-host) (gcc version 7.3.0 (GCC)) #1 SMP Mon May 20 19:35:22 UTC 2019'
+			readFileSync: () => 'Linux version 4.19.43-microsoft-standard (oe-user@oe-host) (gcc version 7.3.0 (GCC)) #1 SMP Mon May 20 19:35:22 UTC 2019',
 		},
 		'is-docker': () => true,
 		os: {
-			release: () => 'microsoft'
-		}
+			release: () => 'microsoft',
+		},
 	});
 
 	t.false(isWsl());