yq has introduced '!!merge' inside yml file and not sure why

[kelly-scalapay]

Ive used yq to modify and add extra steps to a bitbucket pipelines yml file and noticed that its changed the below:

    Pipeline-Deploy-Foo:
      - step:
          <<: *Deploy-Foo-Auto
          trigger: automatic

To the below:

    Pipeline-Deploy-Foo:
      - step:
          !!merge <<: *Deploy-Foo-Auto
          trigger: automatic

This area of the yml file wasn't modified or inserted as part of the yq command so i'm not sure why its made this change in the file. Is there a way I can have it not introduce the !!merge word infront of the <<?

thanks

[mikefarah]

That's because <<: is no longer part of the yaml standard (1.2) - so for compatibility, the underlying yaml parser places that tag explicitly in.

See https://mikefarah.gitbook.io/yq/usage/tips-and-tricks#yq-adds-a-merge-tag-automatically