dns-updater.cmd

@echo off
REM dns-updater.cmd - Windows wrapper to run dns-updater.bundle.js with bun
REM Usage: dns-updater.cmd [args]

REM Determine the directory of this script
set SCRIPT_DIR=%~dp0

REM Execute the bundled script using bun
bun "%SCRIPT_DIR%dns-updater.js" %*

dns-updater.js

#!/usr/bin/env bun
// @bun

// dns-updater.ts
import { promises as fs } from "fs";
function printHelp() {
  console.error(`Usage: dns-updater.ts --zone ZONE --record RECORD --type TYPE --name NAME --content CONTENT [--ttl TTL] [--token-file PATH]`);
  process.exit(1);
}
function parseArgs() {
  const args = {};
  const argv = process.argv.slice(2);
  let i = 0;
  while (i < argv.length) {
    const arg = argv[i++];
    switch (arg) {
      case "-z":
      case "--zone":
        args.zone = argv[i++];
        break;
      case "-r":
      case "--record":
        args.record = argv[i++];
        break;
      case "-t":
      case "--type":
        args.rtype = argv[i++];
        break;
      case "-n":
      case "--name":
        args.name = argv[i++];
        break;
      case "-c":
      case "--content":
        args.content = argv[i++];
        break;
      case "--ttl":
        args.ttl = parseInt(argv[i++], 10);
        break;
      case "--token-file":
        args.tokenFile = argv[i++];
        break;
      case "-h":
      case "--help":
        printHelp();
      default:
        console.error(`Unknown argument: ${arg}`);
        printHelp();
    }
  }
  if (!args.zone || !args.record || !args.rtype || !args.name || !args.content) {
    printHelp();
  }
  const homeDir = process.env.HOME || process.env.USERPROFILE;
  return {
    zone: args.zone,
    record: args.record,
    rtype: args.rtype,
    name: args.name,
    content: args.content,
    ttl: args.ttl ?? 1,
    tokenFile: args.tokenFile ?? `${homeDir}/.cloudflare-token`
  };
}
async function main() {
  const args = parseArgs();
  let token;
  try {
    token = (await fs.readFile(args.tokenFile, "utf8")).trim();
  } catch (e) {
    console.error(`Error reading token file '${args.tokenFile}': ${e.message || e}`);
    process.exit(1);
  }
  const url = `https://api.cloudflare.com/client/v4/zones/${args.zone}/dns_records/${args.record}`;
  const payload = {
    type: args.rtype,
    name: args.name,
    content: args.content,
    ttl: args.ttl
  };
  let response;
  try {
    response = await fetch(url, {
      method: "PUT",
      headers: {
        "Content-Type": "application/json",
        Authorization: `Bearer ${token}`
      },
      body: JSON.stringify(payload)
    });
  } catch (e) {
    console.error(`Unexpected error: ${e.message || e}`);
    process.exit(1);
  }
  const body = await response.text();
  console.log(body);
  let result;
  try {
    result = JSON.parse(body);
  } catch (e) {
    console.error(`Failed to parse response: ${e.message || e}`);
    process.exit(1);
  }
  if (!response.ok || !result.success) {
    console.error(`Error: ${body}`);
    process.exit(1);
  }
}
main();