Merge from vscode cfbd1999769f4f08dce29629fb92fdc0fac53829

build/lib/preLaunch.ts

@@ -0,0 +1,65 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the Source EULA. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+'use strict';
+
+// @ts-check
+
+import * as path from 'path';
+import { spawn } from 'child_process';
+import { promises as fs } from 'fs';
+
+const yarn = process.platform === 'win32' ? 'yarn.cmd' : 'yarn';
+const rootDir = path.resolve(__dirname, '..', '..');
+
+function runProcess(command: string, args: ReadonlyArray<string> = []) {
+	return new Promise((resolve, reject) => {
+		const child = spawn(command, args, { cwd: rootDir, stdio: 'inherit', env: process.env });
+		child.on('exit', err => !err ? resolve() : process.exit(err ?? 1));
+		child.on('error', reject);
+	});
+}
+
+async function exists(subdir: string) {
+	try {
+		await fs.stat(path.join(rootDir, subdir));
+		return true;
+	} catch {
+		return false;
+	}
+}
+
+async function ensureNodeModules() {
+	if (!(await exists('node_modules'))) {
+		await runProcess(yarn);
+	}
+}
+
+async function getElectron() {
+	await runProcess(yarn, ['electron']);
+}
+
+async function ensureCompiled() {
+	if (!(await exists('out'))) {
+		await runProcess(yarn, ['compile']);
+	}
+}
+
+async function main() {
+	await ensureNodeModules();
+	await getElectron();
+	await ensureCompiled();
+
+	// Can't require this until after dependencies are installed
+	const { getBuiltInExtensions } = require('./builtInExtensions');
+	await getBuiltInExtensions();
+}
+
+if (require.main === module) {
+	main().catch(err => {
+		console.error(err);
+		process.exit(1);
+	});
+}