vscode perf cli (#170953)

- add vscode-perf module
- add script to run perfs

scripts/code-perf.js

@@ -0,0 +1,73 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+// @ts-check
+
+const path = require('path');
+const perf = require('@vscode/vscode-perf');
+
+const VSCODE_FOLDER = path.join(__dirname, '..');
+
+async function main() {
+
+	const args = [...process.argv];
+
+	// get build arg from args
+	let buildArgIndex = args.indexOf('--build');
+	buildArgIndex = buildArgIndex === -1 ? args.indexOf('-b') : buildArgIndex;
+	if (buildArgIndex === -1) {
+		args.push('--build');
+		args.push(getLocalCLIPath());
+	} else {
+		const exePath = args[buildArgIndex + 1];
+		args.splice(buildArgIndex + 1, 1, getExePath(exePath));
+	}
+
+	args.push('--folder');
+	args.push(VSCODE_FOLDER);
+	args.push('--file');
+	args.push(path.join(VSCODE_FOLDER, 'package.json'));
+
+	await perf(args);
+}
+
+/**
+ * @param {string} buildPath
+ * @returns {string}
+ */
+function getExePath(buildPath) {
+	buildPath = path.normalize(path.resolve(buildPath));
+	if (buildPath === path.normalize(getLocalCLIPath())) {
+		return buildPath;
+	}
+	let relativeExePath;
+	switch (process.platform) {
+		case 'darwin':
+			relativeExePath = path.join('Contents', 'MacOS', 'Electron');
+			break;
+		case 'linux': {
+			const product = require(path.join(buildPath, 'resources', 'app', 'product.json'));
+			relativeExePath = product.applicationName;
+			break;
+		}
+		case 'win32': {
+			const product = require(path.join(buildPath, 'resources', 'app', 'product.json'));
+			relativeExePath = `${product.nameShort}.exe`;
+			break;
+		}
+		default:
+			throw new Error('Unsupported platform.');
+	}
+	return buildPath.endsWith(relativeExePath) ? buildPath : path.join(buildPath, relativeExePath);
+}
+
+/**
+ * @returns {string}
+ */
+function getLocalCLIPath() {
+	return process.platform === 'win32' ? path.join(VSCODE_FOLDER, 'scripts', 'code-cli.bat') : path.join(VSCODE_FOLDER, 'scripts', 'code-cli.sh');
+}
+
+main();