Merging kubeconfig JSON and YAML - kubernetes

Question

I have two kubeconfigs file, the first one is following which I use to communicate with the cluster and the second one is for Aquasec which is in JSON format. How can I merge these two?
apiVersion: v1
clusters:
- cluster:
certificate-authority-data: DATA+OMITTED
server: https://656835E69F31E2933asdAFAKE3F5904sadFDDC112dsasa7.yld432.eu-west-2.eks.amazonaws.com
name: arn:aws:eks:eu-west-2:test651666:cluster/Magento
- cluster:
certificate-authority-data: DATA+OMITTED
server: https://kubernetes.docker.internal:6443
name: docker-desktop
- cluster:
certificate-authority-data: DATA+OMITTED
server: https://192.142.242.111:6443
name: kubernetes
contexts:
- context:
cluster: arn:aws:eks:eu-west-2:test651666:cluster/testing
user: arn:aws:eks:eu-west-2:test651666:cluster/testing
name: arn:aws:eks:eu-west-2:test651666:cluster/testing
- context:
cluster: docker-desktop
user: docker-desktop
name: docker-desktop
- context:
cluster: docker-desktop
user: docker-desktop
name: docker-for-desktop
- context:
cluster: kubernetes
user: kubernetes-admin
name: kubernetes-admin#kubernetes
current-context: arn:aws:eks:eu-west-2:test651666:cluster/testing
kind: Config
preferences: {}
users:
- name: arn:aws:eks:eu-west-2:test651666:cluster/testing

Answer 1

You can set the KUBECONFIG environment variable to multiple config files delimited by : and kubectl will automatically merge them behind the scenes.
For example:
export KUBECONFIG=config:my-config.json
In the export above, config is the default config file contained within ~/.kube and my-config.json would be your second config file, which you said is in JSON format.
You can see the merged config using this command, which shows a unified view of the configuration that kubectl is currently using:
kubectl config view
Because kubectl automatically merges multiple configs, you shouldn't need to save the merged config to a file. But if you really want to do that, you can redirect the output, like this:
kubectl config view --flatten > merged-config.yaml
Check out Mastering the KUBECONFIG file, Organizing Cluster Access Using kubeconfig Files for more explanation and to see some other examples.