CODEWITHSUNDEEP
yamlyq
majan
majan

Reputation: 139

How to add a field in a yaml file after a specific key in yaml

Hello I have multiple yaml files which I need to updated, and to each file I need to add one or two lines after imagename line. I want use yq, but I am able only to add new value at end of yaml file

My file

containers:
  container1:
    name: service
    org: "company:"
    imagename: thirdparty-ingestion-service
    tagprefix: "-"
    tag: 772x0-69
    ports:
      - port: 6066
        name: debug
      - port: 11100

How it should look

containers:
  container1:
    name: service
    org: "company:"
    imagename: thirdparty-ingestion-service
    imageprefix: ""
    tagprefix: "-"
    tag: 72x0-69
    ports:
      - port: 6066
        name: debug
      - port: 11100

How I added so far

yq .containers.container1.imageprefix="" values.yaml

Upvotes: 0

Views: 1679

Answers (1)

pmf
pmf

Reputation: 36131

While items of an array do have an order, fields within objects do not, so inserting a new field at the desired position may very well not be respected by the next application processing the resulting data. That said, for the time being, collecting the fields (and their values) into an array, modifying their order, then re-assembling the object, will do the job. However, different trickery is needed depending on which implementation of yq you want to use.

Using kislyuk/yq:

.containers.container1 |= with_entries(
  ., (select(.key == "imagename") | {key: "imageprefix", value: ""})
)

Using mikefarah/yq:

.containers.container1 |= (
  to_entries
  | (.[] | select(.key == "imagename") | key + 1) as $i
  | .[:$i] + [{"key": "imageprefix", "value": ""}] + .[$i:]
  | from_entries
)

Upvotes: 1

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