Machine Learning Services extension with package management feature (#8622)

* Machine Learning Services extension with package management feature

extensions/machine-learning-services/src/common/utils.ts

@@ -0,0 +1,48 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the Source EULA. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+'use strict';
+
+import * as uuid from 'uuid';
+import * as path from 'path';
+import * as os from 'os';
+import * as fs from 'fs';
+import * as constants from '../common/constants';
+import { promisify } from 'util';
+
+export async function execCommandOnTempFile<T>(content: string, command: (filePath: string) => Promise<T>): Promise<T> {
+	let tempFilePath: string = '';
+	try {
+		tempFilePath = path.join(os.tmpdir(), `ads_ml_temp_${uuid.v4()}`);
+		await fs.promises.writeFile(tempFilePath, content);
+		let result = await command(tempFilePath);
+		return result;
+	}
+	finally {
+		await fs.promises.unlink(tempFilePath);
+	}
+}
+
+export async function exists(path: string): Promise<boolean> {
+	return promisify(fs.exists)(path);
+}
+
+export async function createFolder(dirPath: string): Promise<void> {
+	let folderExists = await exists(dirPath);
+	if (!folderExists) {
+		await fs.promises.mkdir(dirPath);
+	}
+}
+
+export function getPythonInstallationLocation(rootFolder: string) {
+	return path.join(rootFolder, 'python');
+}
+
+export function getPythonExePath(rootFolder: string): string {
+	return path.join(
+		getPythonInstallationLocation(rootFolder),
+		constants.pythonBundleVersion,
+		process.platform === constants.winPlatform ? 'python.exe' : 'bin/python3');
+}