ocaml-language-server

A language server for OCaml and related languages

Synopsis

This is an implementation of the language server protocol for OCaml and related languages like BuckleScript and Reason.

Server Clients

For a full-featured client for this server see vscode-reasonml.

The language server protocol is still quite new but many other clients are being developed:

• atom-languageclient
• emacs-lsp
• sublime-lsp
• nvim-langserver-shim
• vim-lsp

NOTE: Most of these clients have not yet been tested with the server.

Server Capabilities

• OCaml support
• Reason support
• incremental document synchronization
• code action provider
• code lens provider
• completion provider
• definition provider
• document formatting provider (Reason)
• document highlight provider
• document range formatting provider (Reason)
• document symbol provider
• hover provider
• references provider
• workspace symbol provider

Installing the Server

Requirements

• OCaml 4.02.3 or greater
• Reason 1.4.0 (optional)
• merlin 2.5.0 or greater

The server can be installed with npm:

npm install -g ocaml-language-server

Launching the Server

The server can be launched in the following ways:

ocaml-language-server --node-ipc
ocaml-language-server --socket={number}
ocaml-language-server --stdio

For node-based clients like vscode-reasonml --node-ipc is the most efficient approach. Clients written in other languages should use --stdio or --socket.

Building the server

Execute the following steps:

yarn install
yarn run compile