Traverse the directory tree in Node.js, starting from the current working directory, searching for a "package.json" file with a specific attribute while excluding the node_modules folder and files starting with a dot (.)

find-package-with-attribute.js

import fs from 'fs';
import path from 'path';

const traverseTree = (dir, attribute, cacheTravese = '') => {
  const files = fs.readdirSync(dir);
  for (const file of files) {
    if (
      file === 'node_modules' ||
      file.startsWith('.') ||
      file === cacheTravese
    ) {
      // eslint-disable-next-line no-continue
      continue;
    }

    const filePath = path.join(dir, file);
    const stats = fs.statSync(filePath);

    if (stats.isDirectory()) {
      const found = traverseTree(filePath, attribute);
      if (found) {
        return found;
      }
    } else if (file === 'package.json') {
      const contents = fs.readFileSync(filePath, 'utf-8');
      const json = JSON.parse(contents);
      if (json[attribute]) {
        return filePath;
      }
    }
  }

  return null;
};

const findPackageJson = (dir, attribute, cacheTravese = '') => {
  const foundPath = traverseTree(dir, attribute, cacheTravese);

  if (foundPath) {
    return foundPath;
  }

  if (dir !== '/') {
    const parentDir = path.resolve(dir, '..');
    const cachePrevDir = path.basename(dir);
    return findPackageJson(parentDir, attribute, cachePrevDir);
  }
  
  return null;
};

const cwd = process.cwd();
const attributeKey = 'workspaces';

const foundPath = findPackageJson(cwd, attributeKey);
if (foundPath) {
  console.info(
    `Found package.json with attribute ${attributeKey} at: ${foundPath}
relative path from cwd: ${cwd} ==> ${path.dirname(
      path.relative(cwd, foundPath)
    )}`
  );
} else {
  console.info(
    `No package.json with attribute ${attributeKey} found in workspace tree`
  );
}