function regGetValue (key, value, addOpts, cb) {
const outReValue = value.replace(/\W/g, '.')
const outRe = new RegExp(`^\\s+${outReValue}\\s+REG_\\w+\\s+(\\S.*)$`, 'im')
const reg = path.join(process.env.SystemRoot, 'System32', 'reg.exe')
const regArgs = ['query', key, '/v', value].concat(addOpts)
log.silly('reg', 'running', reg, regArgs)
const child = execFile(reg, regArgs, { encoding: 'utf8' },
function (err, stdout, stderr) {
log.silly('reg', 'reg.exe stdout = %j', stdout)
if (err || stderr.trim() !== '') {
log.silly('reg', 'reg.exe err = %j', err && (err.stack || err))
log.silly('reg', 'reg.exe stderr = %j', stderr)
return cb(err, stderr)
}
const result = outRe.exec(stdout)
if (!result) {
log.silly('reg', 'error parsing stdout')
return cb(new Error('Could not parse output of reg.exe'))
}
log.silly('reg', 'found: %j', result[1])
cb(null, result[1])
})
child.stdin.end()
}