index.js

/*
	MIT License http://www.opensource.org/licenses/mit-license.php
	Author Maor Frankel
*/

var path = require('path');

function accesorString(value) {
  const childProperties = value.split(".");
  const length = childProperties.length;
  let propertyString = "window";
  let result = "";

  for (let i = 0; i < length; i++) {
    if (i > 0)
      result += "if(!" + propertyString + ") " + propertyString + " = {};\n";
    propertyString += "[" + JSON.stringify(childProperties[i]) + "]";
  }

  result += "module.exports = " + propertyString;
  return result;
}

function propertyString(value) {
  const childProperties = value.split(".");
  const length = childProperties.length;
  let propertyString = "window";

  for (let i = 0; i < length; i++) {
    propertyString += "[" + JSON.stringify(childProperties[i]) + "]";
  }

  return propertyString;
}

module.exports = function (input) {
  return input;
};

module.exports.pitch = function (remainingRequest) {
  // Change the request from an /abolute/path.js to a relative ./path.js
  // This prevents [chunkhash] values from changing when running webpack
  // builds in different directories.
  // this.loadModule('@angular/core', (a,b,c,d) =>{debugger;});
  if (this.query.exclude.some(mdl => this._module.rawRequest.match(new RegExp(mdl)))){
    return;
  }
  if (this.query.modules && this.query.modules.length
    && this.query.modules
      .every(mdl => !this._module.rawRequest.match(new RegExp(mdl))))  {
    return;
  }
  const newRequestPath = remainingRequest.replace(
    this.resourcePath,
    '.' + path.sep + path.relative(this.context, this.resourcePath)
  );

  this.cacheable && this.cacheable();
  if (!this.query || !this.query.namespace || !this.query.modules) throw new Error("query parameter is missing");
  // Determine how to resolve the global object
  let request = this._module.rawRequest.split('!');

  let globalVar;
  if (this._module.userRequest.includes('/node_modules/')) {
    request = request[request.length - 1].replace(/^@/i, '').replace(/\//g, '.');
    globalVar = `${this.query.namespace.replace(/^\?/i, '')}.${request}`;
  } else { //Use modules from parent app
    request = request[request.length - 1].replace(/\.\.\//g, '').replace(/\.\//g, '').replace(/\//g, '.');
    globalVar = `${this.query.namespace}.${request}`;
  }
  
  this._module.userRequest = this._module.userRequest + '-shared';
  return accesorString(globalVar) + " = " +
    "Object.assign(" + propertyString(globalVar) + " || {}, require(" + JSON.stringify("-!" + newRequestPath) + "));";
};

module.exports.Externals = function (options) {
  return function (context, request, callback) {
    if (options.modules.every(mdl => !request.match(new RegExp(mdl)))){
      return callback();
    }
    if (options.exclude && options.exclude.some(mdl => request.match(new RegExp(mdl)))){
      return callback();
    }
    let newRequest = request.split('!');
    newRequest = newRequest[newRequest.length - 1].replace(/^[./@]/i, '').split('/');
    return callback(null, {
      root: [options.namespace].concat(newRequest),
      commonjs: request,
      commonjs2: request,
      amd: request
    });

  }
};