Walk a Node project's dependency tree and list the dependencies and their versions

walk.mjs

import fs from 'fs/promises';
import treeify from 'treeify';

const result = await readModDir('.');
console.log(treeify.asTree(result, true));

async function readModDir(modDirPath) {
  const dirEntries = await fs.readdir(new URL(modDirPath, import.meta.url));
  const hasNodeModules = dirEntries.some(entry => entry === 'node_modules');
  const pkgSrc = await fs.readFile(new URL(`${modDirPath}/package.json`, import.meta.url));
  const pkg = JSON.parse(pkgSrc);
  const deps = hasNodeModules ? await readNodeModules(modDirPath) : {};
  const result = {
    [pkg.name]: {
      version: pkg.version
    }
  };
  if (deps && Object.keys(deps).length > 0) {
    result.deps = deps;
  }
  return result;
}

async function readNodeModules(modDirPath) {
  const basePath = `${modDirPath}/node_modules`;
  const dirEntries = await fs.readdir(new URL(basePath, import.meta.url));
  const result = {};

  for (const entry of dirEntries.filter(e => e.startsWith('.') === false)) {
    if (entry.startsWith('@')) {
      const subDirEntries = await fs.readdir(new URL(`${basePath}/${entry}`, import.meta.url));
      for (const subEntry of subDirEntries) {
        const scopedDir = await readModDir(`${basePath}/${entry}/${subEntry}`);
        result[entry] = scopedDir;
      }
      continue;
    }

    const modInfo = await readModDir(`${basePath}/${entry}`);
    result[entry] = modInfo[entry];
  }

  return result;
}