entry-loader.js

var SingleEntryPlugin = require('webpack/lib/SingleEntryPlugin');
var utils = require('loader-utils');

module.exports = function() {
  // ...
};

module.exports.pitch = function(request) {
  this.addDependency(request);
  var query = utils.parseQuery(this.query);
  var compiler = createCompiler(this, request, {
    filename: query.name,
  });
  runCompiler(compiler, this.async());
};

function runCompiler(compiler, callback) {
  compiler.runAsChild(function(error, entries) {
    if (error) {
      callback(error);
    } else if (entries[0]) {
      var url = entries[0].files[0];
      callback(null, getSource(url));
    } else {
      callback(null, null);
    }
  });
}

function createCompiler(loader, request, options) {
  loader.options.resolve.alias['react'] =
    '/Users/danielhusar/src/intercom-js/node_modules/react-16';
  loader.options.resolve.alias['react-dom'] =
    '/Users/danielhusar/src/intercom-js/node_modules/react-dom-16';

  var compiler = getCompilation(loader).createChildCompiler('entry', options);
  var plugin = new SingleEntryPlugin(loader.context, '!!' + request, 'main');

  compiler.parentCompilation.compiler.options.resolve.alias['react'] =
    '/Users/danielhusar/src/intercom-js/node_modules/react-16';
  compiler.parentCompilation.compiler.options.resolve.alias['react-dom'] =
    '/Users/danielhusar/src/intercom-js/node_modules/react-dom-16';

  compiler.options.resolve.alias['react'] =
    '/Users/danielhusar/src/intercom-js/node_modules/react-16';
  compiler.options.resolve.alias['react-dom'] =
    '/Users/danielhusar/src/intercom-js/node_modules/react-dom-16';

  //console.log(options);
  compiler.apply(plugin);
  var subCache = 'subcache ' + __dirname + ' ' + request;
  compiler.plugin('compilation', function(compilation) {
    compilation.compiler.options.resolve = {
      alias: {
        react: '/Users/danielhusar/src/intercom-js/node_modules/react-16',
        'react-dom': '/Users/danielhusar/src/intercom-js/node_modules/react-dom-16',
      },
    };

    compilation.options.resolve = {
      alias: {
        react: '/Users/danielhusar/src/intercom-js/node_modules/react-16',
        'react-dom': '/Users/danielhusar/src/intercom-js/node_modules/react-dom-16',
      },
    };

    if (!compilation.cache) {
      return;
    }
    if (!compilation.cache[subCache]) {
      compilation.cache[subCache] = {};
    }
    compilation.cache = compilation.cache[subCache];
  });
  return compiler;
}

function getSource(url) {
  return 'module.exports = __webpack_public_path__ + ' + JSON.stringify(url);
}

function getCompilation(loader) {
  return loader._compilation;
}