Remove certain fields from a YAML map object using yq - yaml

Question

I have some tricky thing that I need to do for a yaml file, this is how it looks before
Before
apiVersion: v1
items:
- apiVersion: core.k8s.com/v1alpha1
kind: Test
metadata:
creationTimestamp: '2022-02-097T19:511:11Z'
finalizers:
- cuv.ssf.com
generation: 1
name: bar
namespace: foo
resourceVersion: '12236'
uid: 0117657e8
spec:
certificateIssuer:
acme:
email: myemail
provider:
credentials: dst
type: foo
domain: vst
type: bar
status:
conditions:
- lastTransitionTime: '2022-02-09T19:50:12Z'
message: test
observedGeneration: 1
reason: Ready
status: 'True'
type: Ready
lastOperation:
description: test
state: Succeeded
type: Reconcile
https://codebeautify.org/yaml-validator/y22fe4943
I need to remove all the fields under section metadata and the tricky part is to keep only the name and namespace
in addition to removing the status section at all, it should look like following
After
apiVersion: v1
items:
- apiVersion: core.k8s.com/v1alpha1
kind: Test
metadata:
name: bar
namespace: foo
spec:
certificateIssuer:
acme:
email: myemail
provider:
credentials: dst
type: foo
domain: vst
type: bar
After link
https://codebeautify.org/yaml-validator/y220531ef
Using yq (https://github.com/mikefarah/yq/) version 4.19.1

Answer 1

Using mikefarah/yq (aka Go yq), you could do something like below. Using del for deleting an entry and with_entries for selecting known fields
yq '.items[] |= (del(.status) | .metadata |= with_entries(select(.key == "name" or .key == "namespace")))' yaml
Starting v4.18.1, the eval flag is the default action, so the e flag can be avoided

Answer 2

This should work using yq in the implementaion of https://github.com/kislyuk/yq (not https://github.com/mikefarah/yq), and the -y (or -Y) flag:
yq -y '.items[] |= (del(.status) | .metadata |= {name, namespace})'
apiVersion: v1
items:
- apiVersion: core.k8s.com/v1alpha1
kind: Test
metadata:
name: bar
namespace: foo
spec:
certificateIssuer:
acme:
email: myemail
provider:
credentials: dst
type: foo
domain: vst
type: bar