wizard for deploying bdc (#7183)

* wip

* wip2

* wip eod 820

* wip 822

* text component improvements and misc changes

* aria-label

* targetClusterPage wip

* target cluster page

* target cluster page

* wip 827

* wip deployment profile page

* profile page

* service settings page

* wip 0903

* 0909 wip

* 0910

* 0911

* sql instance and working directory

* notebooks

* docker version on windows

* EULA env var

* 917 updates

* address comments

* use async file access

* fix the summary page display issue for ad auth

* add save json file buttons

* use promise for private methds

* review feedbacks

* refactor

* pass json to notebooks

* fix no tool scenario

* bypass tool check if installed

* update hint text

* update notebooks

* workaround azdata first time use

* comments

* accept eula and some text update

* fix the error in package.json

* promise instead of thenable

* comments

* fix typo

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

@@ -0,0 +1,52 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the Source EULA. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+import * as path from 'path';
+import * as os from 'os';
+import * as yamljs from 'yamljs';
+import * as fs from 'fs';
+
+export interface KubeClusterContext {
+	name: string;
+	isCurrentContext: boolean;
+}
+
+export interface IKubeService {
+	getDefautConfigPath(): string;
+	getClusterContexts(configFile: string): Promise<KubeClusterContext[]>;
+}
+
+export class KubeService implements IKubeService {
+	getDefautConfigPath(): string {
+		return path.join(os.homedir(), '.kube', 'config');
+	}
+
+	getClusterContexts(configFile: string): Promise<KubeClusterContext[]> {
+		return fs.promises.access(configFile).catch((error) => {
+			if (error && error.code === 'ENOENT') {
+				return [];
+			} else {
+				throw error;
+			}
+		}).then(() => {
+			const config = yamljs.load(configFile);
+			const rawContexts = <any[]>config['contexts'];
+			const currentContext = <string>config['current-context'];
+			const contexts: KubeClusterContext[] = [];
+			if (currentContext && rawContexts && rawContexts.length > 0) {
+				rawContexts.forEach(rawContext => {
+					const name = <string>rawContext['name'];
+					if (name) {
+						contexts.push({
+							name: name,
+							isCurrentContext: name === currentContext
+						});
+					}
+				});
+			}
+			return contexts;
+		});
+	}
+}