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'use strict';
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var os = require('os');
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var semver = require('semver');
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var nameMap = {
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'10.0': '10',
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'6.3': '8.1',
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'6.2': '8',
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'6.1': '7',
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'6.0': 'Vista',
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'5.1': 'XP',
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'5.0': '2000',
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'4.9': 'ME',
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'4.1': '98',
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'4.0': '95'
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};
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module.exports = function (release) {
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var verRe = /\d+\.\d+/;
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var version = verRe.exec(release || os.release());
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// workaround for Windows 10 on node < 3.1.0
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if (!release && process.platform === 'win32' &&
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semver.satisfies(process.version, '>=0.12.0 <3.1.0')) {
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try {
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version = verRe.exec(String(require('child_process').execSync('ver.exe', {timeout: 2000})));
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} catch (err) {}
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}
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if (release && !version) {
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throw new Error('`release` argument doesn\'t match `n.n`');
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}
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return nameMap[(version || [])[0]];
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};
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