(Continued from ocaml/odoc#156 (comment))

We recently introduced support for Reason syntax generation in odoc.

Specifically, the following option is now implemented:

$ odoc html [--syntax=<ml|re>]   (default=ml)

It would be great if dune had the ability to pass this option to odoc and thus allow users to generate either or both syntaxes.

A few options were discussed:

1. Introduce different targets for each syntax: @doc and @reason-doc (suggested by @rgrinberg).
2. Decide which syntax to generate based on the file extension (suggested by @diml).

The second option seems very natural and doesn't require user-facing changes but it also doesn't allow the generation of both syntaxes at the same time.

Note: The --lang option mentioned in this issues was renamed to --syntax.