Unable to rename directory using Google Cloud SDK getting 404: No such object:buket/olddirname - directory

Question

I am trying to rename a directory of google cloud using the SDK. I am getting error message of 404 No such object:buketname/previousDirName. Renaming a file works fine but only facing issue in renaming folder.
Here is the code i am using:
if(file_exists(dirname(__DIR__) .'/vendor/autoload.php')){
$selected_bucket = 'BucketName';
$key_file = dirname(__DIR__).'/authkey.json';
$client = new StorageClient([
'keyFilePath' => $key_file,
]);
$bucket = $client->bucket($selected_bucket);
$endpoint = 'https://storage.googleapis.com/'. $selected_bucket;
if(isset($subfolder)){
$adapter = new GoogleStorageAdapter($client, $bucket, $subfolder.'/'); // code to list specific subfolder of the bucket
} else {
$adapter = new GoogleStorageAdapter($client, $bucket);
}
$filesystem = new Filesystem($adapter, Array ( "url" => $endpoint ));
// rename a file
$filesystem->rename('filename.txt', 'newname.txt'); // works fine
// rename a directory
$response = $filesystem->rename('developer', 'developer123');
print_r($response);
die();
}
I tried to debug in the sdk but nothing found. I searched the issue if someone faced the same issue but didn't found any working solution. I found one but the solution was in gsutil.
Please please suggest me what I am missing in case of renaming directory.
Thanks

Answer 1

Google Cloud Storage does not not have the concept of "folder", there are only buckets that contain storage objects (flat namespace) and the meaning of "/" is really imposed by clients (and client libraries). As such, folders can't be renamed atomically and thus you would need to rename each of the contained files, by using the gsutil mv command as you have already figured out, like:
gsutil -d mv gs://my-bucket/folder1 gs://my-bucket/folder2
The -d option will cause it to output the sequence of requests gsutil generates to do the rename and additional debug info needed.
In addition, you could try using the -I option, which reads the file list from stdin and is supported with the mv command, as stated here.
Here you may find an example of code samples as well.