find-webpack-unrequired.js

var exec = require('child_process').exec;
var config = require('./src/browser.webpack.config.js');
var compiler = require('webpack')(config);
var path = require('path');

compiler.run(function (err, stats) {
  if (err) {
    throw err
  }

  var json = stats.toJson({
    assets: true,
    modules: true
  });

  if (json.errors.length > 0) {
    console.log(json.errors.join('\n'));
    throw 'Webpack errors';
  }

  var modules = json.modules.filter(function (m) { return m.name.match(/\/src\//); });
  var usedFiles = modules.map(function (m) {
    return path.resolve(__dirname, m.name);
  });

  getFiles(__dirname + '/src/core', function (err, results) {
    if (err) { throw err; }

    var unused = results.filter(function (file) {
      return usedFiles.indexOf(file) === -1;
    });

    console.log(unused);
    console.log('Used:', usedFiles.length, 'Files:', results.length, 'Unused:', unused.length);
  });
});


function getFiles(path, done) {
  exec('find ' + path + ' -type f', function (err, results) {
    if (err) { return done(err); }

    done(null, results.trim().split('\n'));
  });
}