fs-extra-size proposal

fs-extra-size.js

const fs = require('fs-extra');
const path = require('path');

/**
 * Get's the size of a file or directory.
 *
 * @param {string} p The path to the file or directory
 * @returns {number}
 */
function sizeSync(p) {
  const stat = fs.statSync(p);
  if(stat.isFile())
    return stat.size;
  else if(stat.isDirectory())
    return fs.readdirSync(p).reduce((a, e) => a + sizeSync(path.join(p, e)), 0);
  else return 0; // can't take size of a stream/symlink/socket/etc
}

/**
 * Get's the size of a file or directory.
 *
 * @param {string} p The path to the file or directory
 * @returns {Promise<number>}
 */
async function size(p) {
  return fs.stat(p).then(stat => {
    if(stat.isFile())
      return stat.size;
    else if(stat.isDirectory())
      return fs.readdir(p)
        .then(entries => Promise.all(entries.map(e => size(path.join(p, e)))))
        .then(e => e.reduce((a, c) => a + c, 0));
    else return 0; // can't take size of a stream/symlink/socket/etc
  });
}