bun js script to get a online minecraft launch string from prismlauncher on linux

mcacc.ts

#!/usr/bin/env bun
import fs from 'fs';

const args = [...process.argv].splice(2);

let filter = (username: string) => true;

if (args.length > 0) {
  filter = (username: string) => username.toLowerCase().startsWith(args[0].toLowerCase());
}

const accounts = JSON.parse(fs.readFileSync(`${Bun.env.HOME}/.local/share/PrismLauncher/accounts.json`).toString());

const profile = accounts.accounts.filter(v => filter(v.profile.name))[0];

if (!profile) {
  console.error("Could not find profile! Available accounts: " + accounts.accounts.map(v => v.profile.name).join(', '));
  process.exit(1);
}

const cstr = `--accessToken "${profile.ygg.token}" --username ${profile.profile.name} --userType msa`;

const proc = Bun.spawn(["wl-copy"], {
  stdin: "pipe",
  stdout: "ignore",
  stderr: "inherit",
});

proc.stdin.write(cstr);
proc.stdin.end();

const code = await proc.exited;
if (code !== 0) throw new Error(`wl-copy exited with code ${code}`);

console.log("Copied args to launch mc as " + profile.profile.name)