get-module-deps.js

const fs      = require('fs');
const path    = require('path');
const resolve = require('resolve');

const rImport  = /import\s+(.+)\s+from\s+['"]([^'"]+)['"]/;
const rRequire = /require\s*\(['"]([^'")]+)['"]\)/;

const parseDeps = name => {
  return fs.readFileSync(name, 'utf8')
    .replace(/\/\*[\s\S]*?\*\//g, '') // block-comment
    .replace(/(import.*)(\{[\s\S]+\})(.*from)/gm, (m, $1, $2, $3) => {
      return $1 + $2.replace(/\n/g, '') + $3;
    })
    .split('\n')
    .map(line => {
      if (/^\s*\/\//.test(line)) // line-comment
        return null;
      if (rImport.test(line)) {
        return rImport.exec(line)[2];
      }
      if (rRequire.test(line)) {
        return rRequire.exec(line)[1];
      }
      return null;
    })
    .filter(Boolean)
    .map(mod => {
      return resolve.sync(mod, {
        basedir: path.dirname(name),
        extensions: [ '.js', '.jsx', '.es6' ]
      });
    });
};

const findDeps = (name) => {
  let f; // file name
  const c = {}; // cache
  const d = []; // deps
  const q = [ name ]; // pending queue
  while (f = q.pop()) { // eslint-disable-line
    d.push(f);
    if (!c[f]) {
      c[f] = parseDeps(f);
    }
    if (c[f]) {
      q.push.apply(q, c[f]); // eslint-disable-line
    }
  }
  return d.filter((p, i) => d.indexOf(p) === i);
};

console.log(findDeps('./client/pages/index.jsx'));