Creating "!reference" tag for array

[robross0606]

I need to output some YAML from scratch that looks like this:

  rules:
    - !reference [.artifact-rules, rules]

I tried using the tag command with a custom tag but this doesn't seem to work as expected:

  yq -n '
  {
    "rules": [
      (["artifact-rules", "rules"] tag="!reference")
    ]
  }
  '

Attempting to tag the array results in wiping out the contents of the array for reasons I don't understand:

rules:
  -

However, running without the tag produces the content, though not in the array style I would like:

rules:
  - - artifact-rules
    - rules

Is any of this possible with yq?

[robross0606]

I think I might have figured out at least one way to do it:

  yq -n '
  {
    "rules": [
      (["artifact-rules", "rules"] | . tag="!reference")
    ]
  }
  '

Yields

  rules:
    - !reference
      - .artifact-rules
      - rules

Still not sure if there's some way to change the array style.

[mikefarah]

You can use the style tag to change the array style:

yq -n '.rules = [ [".artifact-rules", "rules"] | . tag = "!reference" | . style= "flow" ]'
rules:
  - !reference [.artifact-rules, rules]