Reason & OCaml
Being authored in Reason, Onivim supports Reason as well as sister languages like OCaml.
Onivim comes out-of-the-box with support for syntax highlighting and language detection for Reason & OCaml.
However, to get the most out of Onivim for these languages, you'll need a language server - we recommend ocaml-lsp.
Setup for a native esy project
If you're building a Reason or OCaml project with esy, simply add the following to the devDependencies of your package.json or esy.json:
"devDependencies": {
"@opam/ocaml-lsp-server": "ocaml/ocaml-lsp:ocaml-lsp-server.opam"
}
Run esy to install and build, and open Onivim in the directory of your project.
Setup for a native opam project
You can install ocaml-lsp-server via these OPAM commands:
$ opam pin add ocaml-lsp-server https://github.com/ocaml/ocaml-lsp.git
$ opam install ocaml-lsp-server
Build your project, and then open Onivim in the directory of your project.
FAQ
I'm not getting completions or diagnostics - what can I try?
The tooling depends on the project being built - so make sure your project is built before you open Onivim.
Why isn't ocaml-lsp bundled with Onivim?
The ocamllsp binary depends on Merlin, which is tightly coupled to the OCaml compiler version being used - therefore, we rely on the environment to supply the correct ocamllsp binary for the current compiler version.