Add azcli extension (#16029)

extensions/azcli/src/common/utils.ts

@@ -0,0 +1,34 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the Source EULA. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+import * as azdataExt from 'azdata-ext';
+import * as which from 'which';
+import * as loc from '../localizedConstants';
+
+export class NoAzdataError extends Error implements azdataExt.ErrorWithLink {
+	constructor() {
+		super(loc.noAzdata);
+	}
+
+	public get messageWithLink(): string {
+		return loc.noAzdataWithLink;
+	}
+}
+/**
+ * Searches for the first instance of the specified executable in the PATH environment variable
+ * @param exe The executable to search for
+ */
+export function searchForCmd(exe: string): Promise<string> {
+	// Note : This is separated out to allow for easy test stubbing
+	return new Promise<string>((resolve, reject) => which(exe, (err, path) => err ? reject(err) : resolve(<any>path)));
+}
+
+/**
+ * Gets the message to display for a given error object that may be a variety of types.
+ * @param error The error object
+ */
+export function getErrorMessage(error: any): string {
+	return error.message ?? error;
+}