use yq version4 to update yaml file

im having the following code which works on yq 3 and when I try to upgrade to yq4 it fails

this works on yq3 yq w -i dep.yaml 'spec.spec.image' $(MY_VAL)

on yq4 I got error that it doenst know whow can I make it works I didn't find any match example which can help to my case

Solution

Take a look at the section 'Updating / writing documents' of the migration guide.

The following command should work for your task with version 4 of yq:

dep.yaml before execution

a:
  b: 1
spec:
  spec:
    image: image_old.jpg
c:
  d: 2

MY_VAL="image_new.jpg" yq -i e '.spec.spec.image = strenv(MY_VAL)' dep.yaml

dep.yaml after execution

a:
  b: 1
spec:
  spec:
    image: image_new.jpg
c:
  d: 2