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KDL support
Is your feature request related to a problem? Please describe. KDL is a configurations language with compatibility with JSON & XML with a subjectively more terse syntax while supporting nesting unlike TOML. While KDL has type annotations, it doesn’t have advanced types like Nickel such as ADTs. I would like to use Nickel to assert types, or import/export KDL documents.
Describe the solution you'd like
nickel export --format kdl, import "document.kdl"
Describe alternatives you've considered Using some KDL→JSON→Nickel pipeline.
Additional context There are Rust libraries for parsing KDL already. Other projects like Zellij have been picking it up as a configuration language (I am considering this too).
Hi, thanks for the proposal. We don't have a well-defined policy about adding export format support right now, but I don't think it'd be an issue to add KDL - at least we would gladly accept contributions on this front. Do you expect the export to preserves some of the types though? That might a bit more involved.
Do you expect the export to preserves some of the types though? That might a bit more involved.
The annotations seem to be to help tools with parsing, but don’t need to exist.
For project-adjacent implementations:
- Rust: https://github.com/kdl-org/kdl-rs
- OCaml: https://github.com/eilvelia/ocaml-kdl/