Windows: Refactor Shell Scripts to Node.js for Cross-Platform Compatibility (#784)

scripts/setup-dev.js

@@ -0,0 +1,42 @@
+/**
+ * @license
+ * Copyright 2025 Google LLC
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import { execSync } from 'child_process';
+
+try {
+  execSync('command -v npm', { stdio: 'ignore' });
+} catch {
+  console.log('npm not found. Installing npm via nvm...');
+  try {
+    execSync(
+      'curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.40.3/install.sh | bash',
+      { stdio: 'inherit' },
+    );
+    const nvmsh = `\\. "$HOME/.nvm/nvm.sh"`;
+    execSync(`${nvmsh} && nvm install 22`, { stdio: 'inherit' });
+    execSync(`${nvmsh} && node -v`, { stdio: 'inherit' });
+    execSync(`${nvmsh} && nvm current`, { stdio: 'inherit' });
+    execSync(`${nvmsh} && npm -v`, { stdio: 'inherit' });
+  } catch {
+    console.error('Failed to install nvm or node.');
+    process.exit(1);
+  }
+}
+
+console.log('Development environment setup complete.');