How to remove an empty map from YAML?

[andremicocci]

I need to remove an empty map from a YAML.
Sometimes this map may have values, and sometimes this will appears empty.

My YAML code looks like this:

apiVersion: route.openshift.io/v1
kind: Route
metadata:
  annotations: {}
  creationTimestamp: "2021-03-24T13:16:10Z"

I need to remove annotations: {}

My desired output:

apiVersion: route.openshift.io/v1
kind: Route
metadata:
  creationTimestamp: "2021-03-24T13:16:10Z"

Anybody can helps me?

https://stackoverflow.com/questions/68264327/yq-how-to-remove-an-empty-map-from-yaml

[andremicocci]

This example works!!!

yq e 'del(.metadata.annotations | select(length==0))' yaml

[dalain007]

Can someone updated the doc page with example - for empty : {}

https://mikefarah.gitbook.io/yq/operators/delete

[paulolieuthier]

What if metadata is also empty after annotations is removed? Is there a way to recursively delete an object hierarchy if there are no leaf values?

[flavono123]

https://stackoverflow.com/questions/68264327/how-to-remove-an-empty-map-from-yaml-using-yq
I have answered for that but cannot find in yq's native solutions, I use bash.