feat(lsp-mojo): add LSP support for Mojo 🔥 (#4207)

CHANGELOG.org

@@ -1,5 +1,6 @@
 * Changelog
 ** Unreleased 8.0.1
+  * Add Mojo 🔥 support
   * Add lsp-solidity, using the implementation from NomicFoundation
   * Change rust-analyzer base URL to be github.com/rust-lang/rust-analyzer, rather than rust-analyzer/rust-analyzer.
   * Add [[https://github.com/wader/jq-lsp][jq-lsp]]

clients/lsp-mojo.el

@@ -0,0 +1,50 @@
+;;; lsp-mojo.el --- lsp-mode Mojo integration -*- lexical-binding: t; -*-
+
+;; Copyright (C) 2023 Adam Liter
+
+;; Author: Adam Liter <[email protected]>
+;; Keywords: languages,tools
+
+;; This program is free software; you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation, either version 3 of the License, or
+;; (at your option) any later version.
+
+;; This program is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;; GNU General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+;;; Commentary:
+
+;;  client for Mojo 🔥
+
+;;; Code:
+
+(require 'lsp-mode)
+
+(defgroup lsp-mojo nil
+  "LSP support for Mojo 🔥, using mojo-lsp-server."
+  :group 'lsp-mode
+  :link '(url-link "https://github.com/modularml/mojo"))
+
+(defcustom lsp-mojo-executable "mojo-lsp-server"
+  "The Mojo 🔥 LSP executable to use.
+Leave as just the executable name to use the default behavior of
+finding the executable with variable `exec-path'."
+  :group 'lsp-mojo
+  :type 'string)
+
+(lsp-register-client
+ (make-lsp-client
+  :new-connection (lsp-stdio-connection (lambda () lsp-mojo-executable))
+  :activation-fn (lsp-activate-on "mojo")
+  :server-id 'mojo))
+
+(lsp-consistency-check lsp-mojo)
+
+(provide 'lsp-mojo)
+;;; lsp-mojo.el ends here

lsp-mode.el

@@ -181,7 +181,7 @@ As defined by the Language Server Protocol 3.16."
      lsp-glsl lsp-graphql lsp-hack lsp-grammarly lsp-groovy lsp-haskell lsp-haxe
      lsp-idris lsp-java lsp-javascript lsp-json lsp-kotlin lsp-latex lsp-ltex
      lsp-lua lsp-markdown lsp-marksman lsp-mdx lsp-mint lsp-move lsp-nginx lsp-nim lsp-nix lsp-magik
-     lsp-metals lsp-mssql lsp-ocaml lsp-openscad lsp-pascal lsp-perl lsp-perlnavigator
+     lsp-mojo lsp-metals lsp-mssql lsp-ocaml lsp-openscad lsp-pascal lsp-perl lsp-perlnavigator
      lsp-pls lsp-php lsp-pwsh lsp-pyls lsp-pylsp lsp-pyright lsp-python-ms lsp-purescript
      lsp-r lsp-racket lsp-remark lsp-ruff-lsp lsp-rf lsp-rubocop lsp-rust lsp-semgrep lsp-shader
      lsp-solargraph lsp-sorbet lsp-sourcekit lsp-sonarlint lsp-tailwindcss lsp-tex lsp-terraform
@@ -812,6 +812,7 @@ Changes take effect only when a new session is started."
     (python-mode . "python")
     (python-ts-mode . "python")
     (cython-mode . "python")
+    ("\\(\\.mojo\\|\\.🔥\\)\\'" . "mojo")
     (lsp--render-markdown . "markdown")
     (move-mode . "move")
     (rust-mode . "rust")