readdir-tree.js

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

const fsp = fs.promises;


/**
 * Creates a directory tree
 * @param {string} dirname Path to directory to read
 * @returns {object} A directory tree
 */
async function readdirTree (dirname) {
  const baseDir = {};
  const queue = [{ base: baseDir, dir: dirname }];
  
  while (queue.length) {
    const { base, dir } = queue.shift();
    const listing = fsp.readdir(dir, { withFileTypes: true });
    
    for (const item of listing) {
      if (item.isDirectory()) {
        const tree = {};
        const fullDir = path.join(dir, item.name);
        
        base[item.name] = tree;
        queue.push({ base: tree, dir: fullDir });
      } else {
        base[item.name] = true;
      }
    }
  }
  
  return baseDir;
}