Kustomize: Patching configMapGenerator with json values from file

Dear community,

could you please suggest if it is possible to have patch in kustomize for configMapGenerator with json values from file.

For instance I have a patch file:

But I’d like to have a magic way to specify file path in “value” section to include data in json format.

Something like this:

- patch: |-
    - op: replace
      path: /some/existing/path
      value: @pure_json_data.json 

As a real-world example - I want to patch Grafana dashboards per environment. But these dashboards are extremely huge json file and for everyone in my team it would be nicer/convenient to store these dashboards in standalone files.

It might be already implemeted - could you please point me?)

Thank you,