Add Windows Server detection and require Node.js 4 (#7)

Author: silverwind

.travis.yml

@@ -3,5 +3,3 @@ language: node_js
 node_js:
   - '6'
   - '4'
-  - '0.12'
-  - '0.10'

index.js

@@ -1,35 +1,40 @@
+/* eslint-disable quote-props */
 'use strict';
-var os = require('os');
-var semver = require('semver');
+const os = require('os');
+const execa = require('execa');
 
-var nameMap = {
+// Reference: https://www.gaijin.at/en/lstwinver.php
+const nameMap = {
 	'10.0': '10',
 	'6.3': '8.1',
 	'6.2': '8',
 	'6.1': '7',
 	'6.0': 'Vista',
+	'5.2': 'Server 2003',
 	'5.1': 'XP',
 	'5.0': '2000',
 	'4.9': 'ME',
 	'4.1': '98',
 	'4.0': '95'
 };
 
-module.exports = function (release) {
-	var verRe = /\d+\.\d+/;
-	var version = verRe.exec(release || os.release());
-
-	// workaround for Windows 10 on node < 3.1.0
-	if (!release && process.platform === 'win32' &&
-		semver.satisfies(process.version, '>=0.12.0 <3.1.0')) {
-		try {
-			version = verRe.exec(String(require('child_process').execSync('ver.exe', {timeout: 2000})));
-		} catch (err) {}
-	}
+module.exports = release => {
+	const version = /\d+\.\d+/.exec(release || os.release());
 
 	if (release && !version) {
 		throw new Error('`release` argument doesn\'t match `n.n`');
 	}
 
-	return nameMap[(version || [])[0]];
+	const ver = (version || [])[0];
+
+	// Server 2008, 2012 and 2016 versions are ambiguous with desktop versions
+	if (!release && ['6.1', '6.2', '6.3', '10.0'].indexOf(ver) !== -1) {
+		const stdout = execa.sync('wmic', ['os', 'get', 'Caption']).stdout || '';
+		const year = (stdout.match(/2008|2012|2016/) || [])[0];
+		if (year) {
+			return `Server ${year}`;
+		}
+	}
+
+	return nameMap[ver];
 };

package.json

@@ -10,7 +10,7 @@
     "url": "sindresorhus.com"
   },
   "engines": {
-    "node": ">=0.10.0"
+    "node": ">=4"
   },
   "scripts": {
     "test": "xo && ava"
@@ -32,7 +32,7 @@
     "version"
   ],
   "dependencies": {
-    "semver": "^5.0.1"
+    "execa": "^0.7.0"
   },
   "devDependencies": {
     "ava": "*",

readme.md

@@ -42,6 +42,7 @@ Type: `string`
 
 By default the current OS is used, but you can supply a custom release number, which is the output of [`os.release()`](http://nodejs.org/api/os.html#os_os_release).
 
+Note: Most Windows Server versions cannot be detected based on the release number alone. There is runtime detection in place to work around this, but it will only be used if no argument is supplied.
 
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