Merge commit 'be3e8236086165e5e45a5a10783823874b3f3ebd' as 'lib/vscode'

lib/vscode/build/npm/preinstall.js

@@ -0,0 +1,34 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+let err = false;
+
+const majorNodeVersion = parseInt(/^(\d+)\./.exec(process.versions.node)[1]);
+
+if (majorNodeVersion < 10 || majorNodeVersion >= 13) {
+	console.error('\033[1;31m*** Please use node >=10 and <=12.\033[0;0m');
+	err = true;
+}
+
+const cp = require('child_process');
+const yarnVersion = cp.execSync('yarn -v', { encoding: 'utf8' }).trim();
+const parsedYarnVersion = /^(\d+)\.(\d+)\./.exec(yarnVersion);
+const majorYarnVersion = parseInt(parsedYarnVersion[1]);
+const minorYarnVersion = parseInt(parsedYarnVersion[2]);
+
+if (majorYarnVersion < 1 || minorYarnVersion < 10) {
+	console.error('\033[1;31m*** Please use yarn >=1.10.1.\033[0;0m');
+	err = true;
+}
+
+if (!/yarn[\w-.]*\.js$|yarnpkg$/.test(process.env['npm_execpath'])) {
+	console.error('\033[1;31m*** Please use yarn to install dependencies.\033[0;0m');
+	err = true;
+}
+
+if (err) {
+	console.error('');
+	process.exit(1);
+}