Deleting object incorrectly deleting attribute, how to delete object?

[CraigRubendall]

I'm using yq 4.20.1.

I'm working with my kubernetes site.yaml file. What I need to do is to remove any PodDisruptionBudget objects.

I can find them properly using this command:

yq eval 'select(.kind == "PodDisruptionBudget")' site.yaml

when I try to delete using a similar syntax:

yq eval 'del(.kind == "PodDisruptionBudget")' site.yaml

the result is that the kind attribute is removed from all objects (including non-PodDisruptionBudget ones)!

I've also tried several other variants:

yq eval 'del(select(.kind == "PodDisruptionBudget"))' site.yaml # doesn't remove anything

yq eval 'del(. | select(.kind == "PodDisruptionBudget"))' site.yaml # doesn't remove anything

I need to end up with a valid site.yaml file so the answer shouldn't flatten or otherwise disrupt the remaining items in the file contents.

What is the proper syntax for doing so?

[mikefarah]

Without having a representative sample file it's hard to know what the syntax should be.

Assuming its something like this:

- kind: thing
  other: stuff
- kind: PodDisruptionBudget
  interesting: things
- kind: bingo
  meow: cat

Then the command to delete the entry with the kind=PodDistruptionBudget is:

yq 'del(.[] | select(.kind == "PodDisruptionBudget"))' file.yaml

which leaves:

- kind: thing
  other: stuff
- kind: bingo
  meow: cat

What happens under the hood is:

• splat the array into it's individual elements
• pipe through select, to only select the ones with .kind=="PodDisruptionBudget"
• delete those