simple-fs-server/keyout.ts

import { Command } from "https://deno.land/x/cliffy@v0.25.6/mod.ts";
import { prepareSecretKey } from "./util/secret.ts";

export const key_out_cmd = new Command();
key_out_cmd.name("keyout")
  .description("Output the secret key.")
  .option(
    "-f, --file <file:string>",
    "The file to output the key to. (default: stdout)",
  )
  .option("--dotenv", "Output the key in dotenv format.")
  .action(async ({ file, dotenv }) => {
    const key = await prepareSecretKey();
    const keyout = await crypto.subtle.exportKey("jwk", key);
    let out = JSON.stringify(keyout);
    if (dotenv) {
      out = [`SECRET_KEY='${out}'`].join("\n");
    }

    if (file) {
      await Deno.writeTextFile(file, out);
    } else {
      console.log(out);
    }
  });

if (import.meta.main) {
  await key_out_cmd.parse(Deno.args);
}