replace field in a.yaml with field from b.yaml

[hholst80]

This is probably easy but I could not find the right notation how to solve it.

I have a file a.yaml with the contents

bar: "bar"
foo:
- a
- b

and I want to replace foo with the value of foo in the other file b.yaml:

foo:
- c
- d

such that the updated a.yaml has contents

bar: "bar"
foo:
- c
- d

[hholst80]

The current way I am doing is to delete foo from a.yaml and then cat the two files together. That seems like a hack more than a Yaml-aware solution.

[hholst80]

❯ cat a.yaml 
services:
- a
- b
- c

❯ cat b.yaml 
services:
- foobar

❯ yq eval '.images |= load("b.yaml").images' a.yaml
services:
  - foobar