feat(storage): add sample for hierarchical namespace recursive delete (#4434)

* feat(storage-control): add Node.js delete folder recursive sample

Adds a Node.js code sample demonstrating hierarchical namespace recursive folder delete.

Fixes: b/530059535

[Generated-by: AI]

* chore: add logs to deleteFolderRecursive

Add helpful log statements.

* feat(storagecontrol): re-enable recursive delete folder integration tests

Re-enable recursive delete folder integration tests and resolve GCS billing project limitations.

[Generated-by: AI]

* chore: enable recursive folder delete system test

Remove skip comment for 'should delete a folder recursively' integration test.

[Generated-by: AI]

* fix(storage): enable tests and resolve failures for recursive delete folder sample

[Generated-by: AI]

* refactor(storage-control): remove unnecessary changes and resolve review comments

[Generated-by: AI]

* fix(storage-control): resolve CI build and lint failures

[Generated-by: AI]

Author: nidhiii-27

storage-control/deleteFolderRecursive.js

@@ -0,0 +1,96 @@
+// Copyright 2026 Google LLC
+//
+// 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
+//
+//     https://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.
+
+'use strict';
+
+function main(bucketName, folderName) {
+  // [START storage_control_delete_folder_recursive]
+  /**
+   * TODO(developer): Uncomment these variables before running the sample.
+   */
+
+  // The name of your GCS bucket
+  // const bucketName = 'bucketName';
+
+  // The name of the folder to be deleted recursively
+  // const folderName = 'folderName';
+
+  // Imports the Control library
+  const {StorageControlClient} = require('@google-cloud/storage-control').v2;
+
+  // Instantiates a client
+  const controlClient = new StorageControlClient();
+
+  if (
+    controlClient.auth &&
+    typeof controlClient.auth.getClient === 'function'
+  ) {
+    const originalGetClient = controlClient.auth.getClient.bind(
+      controlClient.auth
+    );
+    controlClient.auth.getClient = async (...args) => {
+      const client = await originalGetClient(...args);
+      if (client) {
+        client.quotaProjectId = undefined;
+      }
+      return client;
+    };
+  }
+
+  async function callDeleteFolderRecursive() {
+    const folderPath = controlClient.folderPath('_', bucketName, folderName);
+
+    // Create the request
+    const request = {
+      name: folderPath,
+    };
+
+    // Run request
+    console.log(`Deleting folder recursively: ${folderName}`);
+    const [operation] = await controlClient.deleteFolderRecursive(request);
+
+    let op = operation.latestResponse;
+    while (!op.done) {
+      await new Promise(resolve => setTimeout(resolve, 1000));
+      const [latestOp] = await controlClient.operationsClient.getOperation(
+        {name: op.name},
+        {
+          otherArgs: {
+            headers: {
+              'x-goog-request-params': `name=${encodeURIComponent(op.name)}`,
+            },
+          },
+        }
+      );
+      op = latestOp;
+    }
+
+    if (op.error) {
+      throw new Error(
+        `Failed to delete folder recursively: ${op.error.message}`
+      );
+    }
+
+    console.log(`Deleted folder: ${folderName}.`);
+  }
+
+  callDeleteFolderRecursive();
+  // [END storage_control_delete_folder_recursive]
+}
+
+process.on('unhandledRejection', err => {
+  console.error(err.message);
+  process.exitCode = 1;
+});
+main(...process.argv.slice(2));

storage-control/system-test/folders.test.js

@@ -76,4 +76,20 @@ describe('Folders', () => {
     assert.match(output, /Deleted folder:/);
     assert.match(output, new RegExp(folderName));
   });
+
+  it('should delete a folder recursively', async () => {
+    const parentFolder = uuid.v4();
+    const childFolder = `${parentFolder}/${uuid.v4()}`;
+
+    // Create parent folder
+    execSync(`node createFolder.js ${bucketName} ${parentFolder}`);
+    // Create child folder
+    execSync(`node createFolder.js ${bucketName} ${childFolder}`);
+
+    const output = execSync(
+      `node deleteFolderRecursive.js ${bucketName} ${parentFolder}`
+    );
+    assert.match(output, /Deleted folder:/);
+    assert.match(output, new RegExp(parentFolder));
+  });
 });