Show splash window until bundled extensions have been loaded (#4570)

* Show splash window until bundled extensions have been loaded

Signed-off-by: Juho Heikka <juho.heikka@gmail.com>

* Remove unnecessary variable.

Signed-off-by: Juho Heikka <juho.heikka@gmail.com>

* Refactor autoInitExtensions

Signed-off-by: Juho Heikka <juho.heikka@gmail.com>

* Add timeout to waiting for bundled extensions to load

Signed-off-by: Juho Heikka <juho.heikka@gmail.com>

src/extensions/extension-loader/extension-loader.ts

@@ -255,7 +255,8 @@ export class ExtensionLoader {
 
   loadOnClusterManagerRenderer() {
     logger.debug(`${logModule}: load on main renderer (cluster manager)`);
-    this.autoInitExtensions(async (extension: LensRendererExtension) => {
+
+    return this.autoInitExtensions(async (extension: LensRendererExtension) => {
       const removeItems = [
         registries.GlobalPageRegistry.getInstance().add(extension.globalPages, extension),
         registries.AppPreferenceRegistry.getInstance().add(extension.appPreferences),
@@ -311,7 +312,9 @@ export class ExtensionLoader {
   }
 
   protected autoInitExtensions(register: (ext: LensExtension) => Promise<Disposer[]>) {
-    return reaction(() => this.toJSON(), installedExtensions => {
+    const loadingExtensions: { isBundled: boolean, loaded: Promise<void> }[] = [];
+
+    reaction(() => this.toJSON(), installedExtensions => {
       for (const [extId, extension] of installedExtensions) {
         const alreadyInit = this.instances.has(extId) || this.nonInstancesByName.has(extension.manifest.name);
 
@@ -326,7 +329,14 @@ export class ExtensionLoader {
 
             const instance = new LensExtensionClass(extension);
 
-            instance.enable(register);
+            const loaded = instance.enable(register).catch((err) => {
+              logger.error(`${logModule}: failed to enable`, { ext: extension, err });
+            });
+
+            loadingExtensions.push({
+              isBundled: extension.isBundled,
+              loaded,
+            });
             this.instances.set(extId, instance);
           } catch (err) {
             logger.error(`${logModule}: activation extension error`, { ext: extension, err });
@@ -338,6 +348,8 @@ export class ExtensionLoader {
     }, {
       fireImmediately: true,
     });
+
+    return loadingExtensions;
   }
 
   protected requireExtension(extension: InstalledExtension): LensExtensionConstructor | null {