let powershellPath;

const path = require('path');

const Spawner = require('./spawner');

if (process.env.SystemRoot) {

const system32Path = path.join(process.env.SystemRoot, 'System32');

powershellPath = path.join(

system32Path,

'WindowsPowerShell',

'v1.0',

'powershell.exe'

);

} else {

powershellPath = 'powershell.exe';

}

// Spawn powershell.exe and callback when it completes

const spawnPowershell = function(args, callback) {

// Set encoding and execute the command, capture the output, and return it

// via .NET's console in order to have consistent UTF-8 encoding.

// See http://stackoverflow.com/questions/22349139/utf-8-output-from-powershell

// to address https://github.com/atom/atom/issues/5063

args[0] = `\

[Console]::OutputEncoding=[System.Text.Encoding]::UTF8

$output=${args[0]}

[Console]::WriteLine($output)\

`;

args.unshift('-command');

args.unshift('RemoteSigned');

args.unshift('-ExecutionPolicy');

args.unshift('-noprofile');

Spawner.spawn(powershellPath, args, callback);

};

// Get the user's PATH environment variable registry value.

//

// * `callback` The {Function} to call after registry operation is done.

// It will be invoked with the same arguments provided by {Spawner.spawn}.

//

// Returns the user's path {String}.

exports.getPath = callback =>

spawnPowershell(

["[environment]::GetEnvironmentVariable('Path','User')"],

function(error, stdout) {

if (error != null) {

return callback(error);

}

const pathOutput = stdout.replace(/^\s+|\s+$/g, '');

return callback(null, pathOutput);

}

);