Script for re-exporting all .ts(x) files in a directory

export-all.mjs

import { readdir, readFile, writeFile, access, stat } from 'node:fs/promises';
import { resolve } from 'node:path';

const [, , path] = process.argv;

const HEADER = '// AUTO-GENERATED by export-all.mjs DO NOT CHANGE!';

if (!path) {
  console.error('Missing argument PATH')
  process.exit(1);
}

const indexFilePath = resolve(path, 'index.ts');

if ((await access(indexFilePath).then(_ => true, _ => false))) {
  const indexContent = await readFile(indexFilePath, { encoding: 'utf-8' });
  if (!indexContent.startsWith(HEADER)) {
    console.error('Index already exists!');
    process.exit(2);
  }
  console.info('Replacing existing index.ts');
}

let indexContent = HEADER + "\n\n";
let indexExports = 0;

try {
  const pattern = /\.tsx?$/gm;
  const files = await readdir(path);
  for (const file of files) {
    if (file === 'index.ts') continue;
    if (!file.match(pattern) && !(await stat(resolve(path, file))).isDirectory()) {
      console.log('Skipping %o', file);
      continue;
    }
    const fileWithoutExt = file.replace(pattern, '');
    indexContent += `export * from './${fileWithoutExt}';\n`;
    indexExports++;
  }

  if (indexExports < 1) {
    console.warn('No exports found in path %o, skipping!', path);
    process.exit(0);
  }

  await writeFile(indexFilePath, indexContent);
  // console.log('Output:\n' + indexContent);
  console.info('Added %o exports to %o!', indexExports, indexFilePath);
} catch (err) {
  console.error(err);
}