gistfile1.txt

const fs = require('fs');
const path = require('path');
const { files } = require('.next/next-server.js.nft.json');
const { nodeFileTrace } = require('@vercel/nft');

const getAllFiles = async dirPath => {
  let files = [];
  const dirEntries = await fs.promises.readdir(dirPath, { withFileTypes: true });
  for (const entry of dirEntries) {
    const filePath = path.join(dirPath, entry.name);
    if (entry.isDirectory()) {
      files = files.concat(await getAllFiles(filePath));
    } else {
      files.push(filePath);
    }
  }
  return files;
};

(async () => {
  const { fileList } = await nodeFileTrace(['server.js', 'next.config.js'], {
    base: basePath,
  });
  const filesToKeep = new Set(
    files.map(file => path.resolve('.next', file))
        .concat(Array.from(fileList).map((file) => path.resolve('.next', file)))
        .concat(await getAllFiles(path.resolve(`${basePath}/node_modules/next/dist/compiled/`)))
  );

  const allFiles = await getAllFiles('node_modules');
  await Promise.all(
    allFiles
      .filter(file => !filesToKeep.has(file))
      .map(file => fs.promises.unlink(file))
  );
})();