Show proper warning for outdated Copilot Chat in the next build (microsoft#213852)

Author: roblourens

src/vs/workbench/contrib/chat/browser/chatParticipantContributions.ts

@@ -23,6 +23,9 @@ import { ChatAgentLocation, IChatAgentData, IChatAgentService } from 'vs/workben
 import { IRawChatParticipantContribution } from 'vs/workbench/contrib/chat/common/chatParticipantContribTypes';
 import { isProposedApiEnabled } from 'vs/workbench/services/extensions/common/extensions';
 import * as extensionsRegistry from 'vs/workbench/services/extensions/common/extensionsRegistry';
+import { INotificationService, Severity } from 'vs/platform/notification/common/notification';
+import { Action } from 'vs/base/common/actions';
+import { ICommandService } from 'vs/platform/commands/common/commands';
 
 const chatParticipantExtensionPoint = extensionsRegistry.ExtensionsRegistry.registerExtensionPoint<IRawChatParticipantContribution[]>({
 	extensionPoint: 'chatParticipants',
@@ -116,6 +119,8 @@ export class ChatExtensionPointHandler implements IWorkbenchContribution {
 		@IProductService private readonly productService: IProductService,
 		@IContextKeyService private readonly contextService: IContextKeyService,
 		@ILogService private readonly logService: ILogService,
+		@INotificationService private readonly notificationService: INotificationService,
+		@ICommandService private readonly commandService: ICommandService,
 	) {
 		this._viewContainer = this.registerViewContainer();
 		this.registerListeners();
@@ -159,6 +164,23 @@ export class ChatExtensionPointHandler implements IWorkbenchContribution {
 	private handleAndRegisterChatExtensions(): void {
 		chatParticipantExtensionPoint.setHandler((extensions, delta) => {
 			for (const extension of delta.added) {
+				// Detect old version of Copilot Chat extension.
+				// TODO@roblourens remove after one release, after this we will rely on things like the API version
+				if (extension.value.some(participant => participant.id === 'github.copilot.default' && !participant.fullName)) {
+					this.notificationService.notify({
+						severity: Severity.Error,
+						message: localize('chatFailErrorMessage', "Chat failed to load. Please ensure that the GitHub Copilot Chat extension is up to date."),
+						actions: {
+							primary: [
+								new Action('showExtension', localize('action.showExtension', "Show Extension"), undefined, true, () => {
+									return this.commandService.executeCommand('workbench.extensions.action.showExtensionsWithIds', ['GitHub.copilot-chat']);
+								})
+							]
+						}
+					});
+					continue;
+				}
+
 				if (this.productService.quality === 'stable' && !isProposedApiEnabled(extension.description, 'chatParticipantPrivate')) {
 					this.logService.warn(`Chat participants are not yet enabled in VS Code Stable (${extension.description.identifier.value})`);
 					continue;