How to extract data with parent key's name included in output

[jimbuitt-trovata]

I'm attempting to strip out sections of a YAML file to generate a new YAML file from a subset of its keys. To do that, I need to extract keys and their values while keeping the desired key in the output.

For example, if I have test.yaml like the following:

rootkey1:
  subkey1:
    a: b
    c: d
rootkey2:
  subkey2:
    e: f
    g: h
rootkey3:
  subkey3:
    i: j
    k: l

To extract rootkey2, normally I would run:

yq .rootkey2 test.yaml

which gives:

subkey2:
  e: f
  g: h

However, I would like to get the output:

rootkey2:
  subkey2:
     e: f
     g: h

Is there a query that gets me both the key name and its value?

Thanks!

[mikefarah]

Good question - I've just updated the docs with an example:https://mikefarah.gitbook.io/yq/operators/path#set-path-to-prune-deep-paths)

(fixed link)