Patch for the `encoding` npm-package to use with webpack. (From: https://github.com/andris9/encoding/issues/18#issuecomment-319721150)

iconv-patch.js

// IIFE
(function() {

'use strict';

// node
var fs = require('fs');
var path = require('path');

// Patch encoding module due to iconv issues -> make it use iconv-lite
(function() {
  var PATCH_VERSION = '0.1.12';
  var PATCH_MODULE = 'encoding';
  var PATCH_REASON = 'Use iconv-lite instead of iconv, helpful for webpack bundling';
  console.log('patching `%s`(%s) module', PATCH_MODULE, PATCH_VERSION);
  var pathToModule = path.dirname(require.resolve(PATCH_MODULE + '/package.json'));
  var pathToModulePackage = path.join(pathToModule, 'package.json');
  var pathToModulePatchedFile1 = path.join(pathToModule, 'lib/iconv-loader.js');
  var pathToModulePatchedFile2 = path.join(pathToModule, 'lib/encoding.js');
  var moduleInfo = require(pathToModulePackage);
  if (moduleInfo.version !== PATCH_VERSION) {
    console.error(
      'patching `encoding` failed - expected `%s` but detected `%s`',
      PATCH_VERSION,
      moduleInfo.version
    );
    process.exit(1);
  }
  var contents;
  if (fs.existsSync(pathToModulePatchedFile1)) {
    contents = [
      '\'use strict\';',
      'module.exports = require(\'iconv-lite\');',
      '',
    ].join('\n');
    fs.writeFileSync(pathToModulePatchedFile1, contents);
  } else {
    console.error('patching `%s` failed because the file does not exist in', PATCH_MODULE, pathToModule);
    process.exit(1);
  }
  if (fs.existsSync(pathToModulePatchedFile2)) {
    contents = fs.readFileSync(pathToModulePatchedFile2).toString();
    contents = contents.replace('console.error(E);','');
    fs.writeFileSync(pathToModulePatchedFile2, contents);
  } else {
    console.error('patching `%s` failed because the file does not exist in', PATCH_MODULE, pathToModule);
    process.exit(1);
  }
  console.log('patching `%s`, reason: `%s` - completed', PATCH_MODULE, PATCH_REASON);
})();

})(this);