retag

#!/usr/bin/env node

import process from 'node:process';
import child_process from 'node:child_process';
import { promisify } from 'node:util';
import { readFile } from 'node:fs/promises';

const execFile = promisify(child_process.execFile);

async function main() {
  let version;
  if (process.argv.length == 2) {
    const content = await readFile('./package.json', { encoding: 'utf8' });
    version = JSON.parse(content).version;
  }
  else if (process.argv.length == 3) {
    version = process.argv[2];
  }
  else {
    throw new Error(`Invalid args ${process.argv.join(', ')}`);
  }

  const res = version.match(/^v?((([0-9]+)\.[0-9]+)\.[0-9]+)$/);
  if (res === null) {
    throw new Error(`Invalid version ${version}`);
  }

  const [ , patch, minor, major ] = res;

  const { stdout, stderr } = await execFile('git', ['rev-parse', '--verify', '--quiet', `v${patch}`]);
  if (stderr.length) {
    process.stderr.write(stderr);
  }
  const tagRef = stdout.trim();

  for (const tag of [minor, major]) {
    await execFile('git', ['update-ref', `refs/tags/v${tag}`, tagRef]);
    process.stdout.write(`v${tag}\n`);
  }
}

main();