Conversion between JSON & YAML is broken in some cases about yq HOT 3 CLOSED

I'll add a concrete example and details when I get a chance

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Here's an example. I've removed the majority of the yaml from the files so it's easy to reproduce.
Given the following yaml files:

# one.yaml
spec:
  jobTemplate:
    spec:

# two.yaml
spec:
  template:
    spec:
      containers:
        - name: task-runner
          args:
            - cp -v -r -L /etc/gitlab/.s3cfg $HOME/.s3cfg && while sleep 3600; do :; done # alpine sleep has no infinity

I want to set spec.jobTemplate.spec in one.yaml equal to spec.template from two.yaml.
Using the following command should achieve that:

yq -y ".spec.jobTemplate.spec = $(yq '.spec.template' two.yaml)" one.yaml

But it causes the line to get broken. If you drop the -y flag and inspect the JSON it's fine and valid.
Interestingly, if you set the value one level shallower i.e.:

yq -y ".spec.jobTemplate = $(yq '.spec.template' two.yaml)" one.yaml

instead of

yq -y ".spec.jobTemplate.spec = $(yq '.spec.template' two.yaml)" one.yaml

it works without breaking the line.

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There is nothing "broken" about the YAML emitted in your test case. As described in the spec, YAML folds whitespace in strings; in other words, unless you escape your whitespace with \ , it will be compressed into a single space, and lines will be wrapped.

As described in the yq help, you can get the behavior that you want by setting the -w/--width option to a large value, for example:

yq -w 99 -y ".spec.jobTemplate.spec = $(yq '.spec.template' two.yaml)" one.yaml

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