Implement Language Server Protocol for ytt

[pivotaljohn]

Write a Language Server Protocol for ytt files (i.e. Starlark within YAML).

(TODO: there is a lot that can be packed into an LSP; enumerate the features so that we can prioritize and tackle.)

(Potentially) Useful Resources:

• https://github.com/juliosueiras/terraform-lsp
• https://github.com/mauve/vscode-terraform
• https://github.com/Microsoft/tolerant-php-parser
• https://github.com/dagger/cuelsp

Related Issues:

• add fmt command to format YAML files #13
• Add experimental Schemas feature #214

Related Conversations:

• "Has anyone found a workaround for keeping syntaxically correct k8s spec files annotated with ytt directives and thus avoid invalid warnings from IDEs?"
  #carvel (~2022-07-06)

• "... it’s [atom] that complains about the two fields existing..."
  #carvel (~2020-10-12)

[iuliancristea]

@pivotaljohn - are there any plans to implement this?

I'm personally interested in JetBrains' Custom Language Support but I guess that has narrower reach.

[prembhaskal]

there are no items in backlog for this, but feel free to give it a try and we could also discuss in our next carvel community meeting.

[KoljaKrueckmeyer]

+1 for this feature request