Ability to have end stream token

[alexandrebrg]

Hello 👋

yamlfmt allows to have the start token ---, but doesn't yet allow for end token .... That would be very useful for projects where this is needed, as for now yamlfmt will just remove the end token, making projects linters fail.

Implementation would be similiar to include_document_start.

[alexandrebrg]

I'd be happy to help if needed :)

[braydonk]

Hi @alexandrebrg thanks for the feature request! I think it makes sense.

I think the only way to do this where yamlfmt actually handles multi-document files properly is to modify the yaml library. It shouldn't be too difficult, I forget if in the Node data structure there is an end to the document, but I am reasonably certain that it should work by adding something to the function that triggers on a yaml_DOCUMENT_END_EVENT here:
https://github.com/braydonk/yaml/blob/10bcc859418b821726f51e2beb7406449cf0b4a2/emitterc.go#L499-L527
If you are willing to give it a shot I would certainly encourage it! My time is even more limited to work on this project recently. I'll be happy to review any PRs to braydonk/yaml and can tag a new release whenever it gets merged so it can be used in yamlfmt.