ocamllsp: add support for the dune filetype (#1884)

* ocamllsp: add dune as supported language

ocaml-lsp-server-1.11.3 enables 'dune' rpc integration
(you need a running `dune build --watch` command which provides the RPC
server).
This allows to reformat `dune` files, and to see `dune` and other build
errors as soon as you change a file (e.g. quite useful on newly created
files which would otherwise show an LSP error until first build).

Signed-off-by: Edwin Török <edwin@etorok.net>

* ocamllsp: dune-project and dune-workspace also mark roots

Although most dune projects will also have a *.opam file,
this file might be generated by the build system.
Newer versions of dune have a dune-project file to mark the root though,
and users can create a dune-workspace file as well.

Note that `dune` files themselves do NOT mark the root: they can be
present in subdirs too.

The rules on how `dune` itself finds the root are documented here:
https://dune.readthedocs.io/en/stable/usage.html#finding-the-root
"The root of the current workspace is determined by looking up a
dune-workspace or dune-project file in the current directory and its
parent directories. Dune requires at least one of these two files to
operate."

Signed-off-by: Edwin Török <edwin@etorok.net>

0 files changed, 0 insertions, 0 deletions