'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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