How do I get document injected into systemjs-builder for bundling a angular 4.0.0 app?

Question

I'm trying to bundle an angular 4.0.0 app.

I've tried browserify but the new angular-loader plugin (that allows for not needing the moduleId in components with templateUrl) does not get called and so the templates end up with the wrong path.

So I moved to systemjs-builder but the problem is that when it runs that plugin it crashes saying that document is not defined.

Is there a way to inject document into the builder?

Or am I doing something wrong?

This is the simple builder I'm testing ( the systemjs-config is the angular quickstart one).

var path = require("path"); 
var Builder = require('systemjs-builder');

var builder = new Builder('src/frontend', 'src/frontend/systemjs.config.js');

builder .bundle('main.js', 'bundle.js') 
.then(function() {   
     console.log('Build complete'); 
}) 
.catch(function(err) {   
     console.log('Build error');   
     console.log(err); 
});

Answer 1

I have been looking for the solution to this problem for long hours. As I could not find it, I modified systemjs-angular-loader.js to bypass the error. With this hack systemjs-builder is now working.

var templateUrlRegex = /templateUrl\s*:(\s*['"`](.*?)['"`]\s*)/gm;
var stylesRegex = /styleUrls *:(\s*\[[^\]]*?\])/g;
var stringRegex = /(['`"])((?:[^\\]\\\1|.)*?)\1/g;

module.exports.translate = function(load){
  if (load.source.indexOf('moduleId') != -1) return load;

  var document=document || null;
  if(document){
    var url = document.createElement('a');
    url.href = load.address;

    var basePathParts = url.pathname.split('/');

    basePathParts.pop();
    var basePath = basePathParts.join('/');

    var baseHref = document.createElement('a');
    baseHref.href = this.baseURL;
    baseHref = baseHref.pathname;

    if (!baseHref.startsWith('/base/')) { // it is not karma
      basePath = basePath.replace(baseHref, '');
    }
  }
  else{
    var address=load.address;
    address=address.replace('file:///'+__dirname+'/', '');
    var basePathParts = address.split('/');

    basePathParts.pop();
    var basePath = basePathParts.join('/');
  }

  load.source = load.source
    .replace(templateUrlRegex, function(match, quote, url){
      var resolvedUrl = url;

      if (url.startsWith('.')) {
        resolvedUrl = basePath + url.substr(1);
      }

      return 'templateUrl: "' + resolvedUrl + '"';
    })
    .replace(stylesRegex, function(match, relativeUrls) {
      var urls = [];

      while ((match = stringRegex.exec(relativeUrls)) !== null) {
        if (match[2].startsWith('.')) {
          urls.push('"' + basePath + match[2].substr(1) + '"');
        } else {
          urls.push('"' + match[2] + '"');
        }
      }

      return "styleUrls: [" + urls.join(', ') + "]";
    });

  return load;
};