Cloud Function storage trigger on folder of a particular Bucket

Question

I have a scenario for executing a cloud function when something is changed in particular folder of a bucket. While I am deploying a function using cli and passing BUCKET/FOLDERNAME as a trigger, it was giving me an error invalid arguments. Is there any one to give trigger at FOLDER level?

Answer 1

You can only specify a bucket name. You cannot specify a folder within the bucket.

A key point to note is that the namespace for buckets is flat. Folders are emulated, they don't actually exist. All objects in a bucket have the bucket as the parent, not a directory.

What you can actually do is implement an if condition inside of your function to only do stuff if the request contains an object with the name of your folder. Keep in mind that by following this approach your function will still be triggered for every object uploaded to your bucket.