Get MacOS Machine ID

MachineId.kt

// Java version of node-machine-id. Used to identify a Mac, for software installation or licenses purposes.
// See the node project at https://github.com/automation-stack/node-machine-id

suspend fun machineId(): String {
    val platformUUID = getPlatformUUID()
    return DigestUtils.sha256Hex(platformUUID)
}

private fun expose(result: String): String {
    val startIndex = result.substringAfter("IOPlatformUUID").substringBefore("\n")
    val regex = "=|\\s+|\"".toRegex()
    return startIndex.replace(regex, "")
        .lowercase();
}

private suspend fun getPlatformUUID(): String {
    return expose(execSync("ioreg -rd1 -c IOPlatformExpertDevice"))
}

private suspend fun execSync(command: String): String = withContext(Dispatchers.IO) {
    val proc = Runtime.getRuntime().exec(command)

    val reader = BufferedReader(InputStreamReader(proc.inputStream))

    val string = buildString {
        do {
            val line = reader.readLine()
            if(line!=null) {
                appendLine(line)
            }
        } while (line != null)
    }
    proc.waitFor()
    string
}