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export default async function machineId(original = false): Promise<string> {  let guid: string;
  switch (Deno.build.os) {    case "linux": {      let output = "";      try {        output = await exec([          "cat",          "/var/lib/dbus/machine-id",          "/etc/machine-id",        ]);      } catch {        output = await exec(["hostname"]);      }      guid = output        .substring(0, output.indexOf("\n"))        .replace(/\r+|\n+|\s+/gi, "")        .toLowerCase();      break;    }
    case "darwin": {      const output = await exec([        "ioreg",        "-rd1",        "-c",        "IOPlatformExpertDevice",      ]);      guid = output        .split("IOPlatformUUID")[1]        .split("\n")[0]        .replace(/\=|\s+|\"/gi, "")        .toLowerCase();      break;    }
    case "windows": {      const output = await exec([        "REG",        "QUERY",        "HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Cryptography",        "/v",        "MachineGuid",      ]);      guid = output        .split("REG_SZ")[1]        .replace(/\r+|\n+|\s+/gi, "")        .toLowerCase();      break;    }  }
  if (original) {    return guid;  }
  return hash(guid);}
async function exec(cmd: string[]): Promise<string> {  let p: Deno.Process;
  try {    p = Deno.run({      cmd,      stdout: "piped",      stderr: "piped",    });
    const { code } = await p.status();
    if (code === 0) {      const rawOutput = await p.output();      const outputString = new TextDecoder().decode(rawOutput);      return outputString;    } else {      const rawError = await p.stderrOutput();      const errorString = new TextDecoder().decode(rawError);      throw new Error(errorString);    }  } finally {    p!.stderr?.close();    p!.close();  }}
async function hash(guid: string): Promise<string> {  const data = new TextEncoder().encode(guid);  const buf = await crypto.subtle.digest("SHA-256", data);  return Array.from(new Uint8Array(buf))    .map((b) => b.toString(16).padStart(2, "0"))    .join("");}
if (import.meta.main) {  console.log(await machineId());}