/**
 * This script is the build configuration common to all our Builder packages.
 * We bundle the output using `esbuild`, and do not publish type definitions.
 *
 * `@vercel/build-utils` is marked as external because it's always an implicit
 * dependency when the Builder is invoked by `vercel build`.
 */
import { join } from 'node:path';
import { readFileSync } from 'node:fs';
import { fileURLToPath } from 'node:url';
import { esbuild } from './build.mjs';

export async function buildBuilder(opts, cwd = process.cwd()) {
  const pkgPath = join(cwd, 'package.json');
  const pkg = JSON.parse(readFileSync(pkgPath, 'utf8'));
  const externals = Object.keys(pkg.dependencies || {});

  await esbuild({
    bundle: true,
    external: ['@vercel/build-utils', ...externals],
    ...opts,
  });
}

// If the script is invoked directly, do the
// common case of esbuild + tsc for types
if (fileURLToPath(import.meta.url) === process.argv[1]) {
  await buildBuilder();
}