rename build to .build

.build/postinstall.js

@@ -0,0 +1,29 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+const fs = require('fs');
+const path = require('path');
+const cp = require('child_process');
+const npm = process.platform === 'win32' ? 'npm.cmd' : 'npm';
+
+function npmInstall(location) {
+	const result = cp.spawnSync(npm, ['install'], {
+		cwd: location,
+		stdio: 'inherit'
+	});
+
+	if (result.error || result.status !== 0) {
+		process.exit(1);
+	}
+}
+
+
+const cwd = process.cwd();
+for (const element of fs.readdirSync(cwd)) {
+	const fullpath = path.join(cwd, element, 'package.json');
+	if (fs.existsSync(fullpath)) {
+		npmInstall(path.join(cwd, element));
+	}
+}