Utility to generate meaningful, unique S3 bucket names

s3-bucket-name-generator.js

// Requires Node 8
// Usage node index.js your-bucket-name

const promisify = require("util").promisify;
const shasum = require("shasum");

const randomBytes = promisify(require("crypto").randomBytes);

(async () => {
  try {
    const prefix = "some-appropriate-prefix-";
    const desiredName = process.argv[2];
    if (!desiredName) throw new Error("You must name your bucket!");

    const randBuf = await randomBytes(256);

    const hash = shasum(randBuf, "sha256");
    console.log(`${prefix}${desiredName}-${hash.substring(0, 6)}`.toLowerCase());
  } catch (e) {
    console.log("Error thrown generating bucket name", e);
  }
})();