How to create an empty node?

[gajus]

This is the desired result:

metadata:
  labels:
  # {{ include "app.resource_labels" . | indent 4 }}

Note that labels does not have a value.

This is a valid YAML, though I don't see a way to create it using this API.

[gajus]

Simple example that shows the deficiency:

console.log(YAML.parseDocument(`metadata:
  labels:
  # {{ include "app.resource_labels" . | indent 4 }}`).toString());

Produces:

metadata:
  ? labels
  # {{ include "app.resource_labels" . | indent 4 }}

[eemeli]

Please try this with yaml@next, rather than the v1 branch?

[gajus]

Is it available in any of the tagged versions?

[eemeli]

Yes: npm install yaml@next.

[gajus]

It does not work in next version either.

Produces:

metadata:
  labels: null # {{ include "app.resource_labels" . | indent 4 }}

, which is more correct, but not the original input.

[eemeli]

Perhaps the missing part is setting an appropriate nullStr option? https://eemeli.org/yaml/#tostring-options