Fix for "Python extension loading..." text never disappears (#14969)

* Fix event

* Explicitly activate component adapter

* Fix lint error

Author: Kartik Raj

src/client/extensionActivation.ts

@@ -8,7 +8,11 @@
 import { CodeActionKind, debug, DebugConfigurationProvider, languages, OutputChannel, window } from 'vscode';
 
 import { registerTypes as activationRegisterTypes } from './activation/serviceRegistry';
-import { IExtensionActivationManager, ILanguageServerExtension } from './activation/types';
+import {
+    IExtensionActivationManager,
+    IExtensionSingleActivationService,
+    ILanguageServerExtension
+} from './activation/types';
 import { registerTypes as appRegisterTypes } from './application/serviceRegistry';
 import { IApplicationDiagnostics } from './application/types';
 import { DebugService } from './common/application/debugService';
@@ -38,6 +42,7 @@ import { registerTypes as debugConfigurationRegisterTypes } from './debugger/ext
 import { IDebugConfigurationService, IDebuggerBanner } from './debugger/extension/types';
 import { registerTypes as formattersRegisterTypes } from './formatters/serviceRegistry';
 import {
+    IComponentAdapter,
     IInterpreterLocatorProgressHandler,
     IInterpreterLocatorProgressService,
     IInterpreterService
@@ -153,6 +158,11 @@ async function activateLegacy(ext: ExtensionState): Promise<ActivationResult> {
 
     // "initialize" "services"
 
+    // There's a bug now due to which IExtensionSingleActivationService is only activated in background.
+    // However for some cases particularly IComponentAdapter we need to block on activation before rest
+    // of the extension is activated. Hence explicitly activate it for now.
+    await serviceContainer.get<IExtensionSingleActivationService>(IComponentAdapter).activate();
+
     const interpreterManager = serviceContainer.get<IInterpreterService>(IInterpreterService);
     interpreterManager.initialize();
 

src/client/pythonEnvironments/legacyIOC.ts

@@ -171,7 +171,7 @@ class ComponentAdapter implements IComponentAdapter, IExtensionSingleActivationS
     }
 
     public get onRefreshed(): vscode.Event<void> | undefined {
-        return this.enabled ? this.refreshing.event : undefined;
+        return this.enabled ? this.refreshed.event : undefined;
     }
 
     // IInterpreterHelper