Fix stringify error from resource deployment extension (#14059)

* Fix stringify error from resource deployment extension

* add comment

extensions/resource-deployment/src/common/utils.ts

@@ -71,3 +71,22 @@ export async function tryExecuteAction<T>(action: () => T | PromiseLike<T>): Pro
 	}
 	return { result, error };
 }
+
+export function deepClone<T>(obj: T): T {
+	if (!obj || typeof obj !== 'object') {
+		return obj;
+	}
+	if (obj instanceof RegExp) {
+		// See https://github.com/Microsoft/TypeScript/issues/10990
+		return obj as any;
+	}
+	const result: any = Array.isArray(obj) ? [] : {};
+	Object.keys(<any>obj).forEach((key: string) => {
+		if ((<any>obj)[key] && typeof (<any>obj)[key] === 'object') {
+			result[key] = deepClone((<any>obj)[key]);
+		} else {
+			result[key] = (<any>obj)[key];
+		}
+	});
+	return result;
+}

extensions/resource-deployment/src/services/resourceTypeService.ts

@@ -17,6 +17,7 @@ import { IPlatformService } from './platformService';
 import { IToolsService } from './toolsService';
 import * as loc from './../localizedConstants';
 import { ResourceTypeWizard } from '../ui/resourceTypeWizard';
+import { deepClone } from '../common/utils';
 
 const localize = nls.loadMessageBundle();
 
@@ -40,7 +41,11 @@ export class ResourceTypeService implements IResourceTypeService {
 			vscode.extensions.all.forEach((extension) => {
 				const extensionResourceTypes = extension.packageJSON.contributes && extension.packageJSON.contributes.resourceDeploymentTypes as ResourceType[];
 				if (extensionResourceTypes) {
-					extensionResourceTypes.forEach((resourceType: ResourceType) => {
+					extensionResourceTypes.forEach((extensionResourceType: ResourceType) => {
+						// Clone the object - we modify it by adding complex types and so if we modify the original contribution then
+						// we can break VS Code functionality since it will sometimes pass this object over the RPC layer which requires
+						// stringifying it - which can break with some of the complex types we add.
+						const resourceType = deepClone(extensionResourceType);
 						this.updatePathProperties(resourceType, extension.extensionPath);
 						resourceType.getProvider = (selectedOptions) => { return this.getProvider(resourceType, selectedOptions); };
 						resourceType.getOkButtonText = (selectedOptions) => { return this.getOkButtonText(resourceType, selectedOptions); };