pseudo code for loading np browser shims

src/core/public/core_system.ts

@@ -100,7 +100,7 @@ export class CoreSystem {
     });
   }
 
-  public start() {
+  public async start() {
     try {
       // ensure the rootDomElement is empty
       this.rootDomElement.textContent = '';
@@ -125,7 +125,7 @@ export class CoreSystem {
         notifications,
       });
 
-      this.legacyPlatform.start({
+      await this.legacyPlatform.start({
         i18n,
         injectedMetadata,
         fatalErrors,

src/core/public/legacy/legacy_service.ts

@@ -54,7 +54,7 @@ export interface LegacyPlatformParams {
 export class LegacyPlatformService {
   constructor(private readonly params: LegacyPlatformParams) {}
 
-  public start(deps: Deps) {
+  public async start(deps: Deps) {
     const {
       i18n,
       injectedMetadata,
@@ -86,6 +86,28 @@ export class LegacyPlatformService {
     // the bootstrap module can modify the environment a bit first
     const bootstrapModule = this.loadBootstrapModule();
 
+    // emulates new platform-like loading cycle
+    // can replace hacks and chrome uiExports
+
+    // shim plugin instantiation
+    // @ts-ignore
+    const plugins = injectedMetadata.getSortedPluginNames().map((name: string) => {
+      const { shim } = require(`plugins/${name}/np_plugin`);
+      return { name, plugin: shim() };
+    });
+
+    // shim setup task
+    for (const { name, plugin } of plugins) {
+      const { shim } = require(`plugins/${name}/np_plugin_setup`);
+      await shim(plugin);
+    }
+
+    // shim start task
+    for (const { name, plugin } of plugins) {
+      const { shim } = require(`plugins/${name}/np_plugin_start`);
+      await shim(plugin);
+    }
+
     // require the files that will tie into the legacy platform
     this.params.requireLegacyFiles();