build(aio): change examples to CLI (#19248)

PR Close #19248

aio/tools/examples/shared/boilerplate/systemjs/src/systemjs-angular-loader.js

@@ -0,0 +1,49 @@
+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 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, '');
+  }
+
+  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;
+};