feat: add fennel-ls support

clients/lsp-fennel.el

@@ -0,0 +1,48 @@
+;;; lsp-fennel.el --- lsp-mode for the fennel-ls -*- lexical-binding: t; -*-
+
+;; Copyright (C) 2024 Merrick Luo
+
+;; Author: Merrick Luo
+;; Keywords: languages
+
+;; 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:
+
+;; LSP client for fennel-ls - an language server for fennel.
+
+;;; Code:
+
+(require 'lsp-mode)
+
+(defgroup lsp-fennel nil
+  "LSP support for the fennel-ls language server."
+  :group 'lsp-mode
+  :link '(url-link "https://git.sr.ht/~xerool/fennel-ls"))
+
+;; TODO: consider find in luarocks install location
+(defun lsp-fennel--ls-command ()
+  (executable-find "fennel-ls"))
+
+(lsp-register-client
+ (make-lsp-client
+  :new-connection (lsp-stdio-connection #'lsp-fennel--ls-command)
+  :activation-fn (lsp-activate-on "fennel")
+  :priority -2
+  :server-id 'fennel-ls))
+
+(lsp-consistency-check lsp-fennel)
+
+(provide 'lsp-fennel)
+;;; lsp-fennel.el ends here

lsp-mode.el

@@ -783,6 +783,7 @@ Changes take effect only when a new session is started."
     ("\\.jsonnet$" . "jsonnet")
     ("\\.jsx$" . "javascriptreact")
     ("\\.lua$" . "lua")
+    ("\\.fnl$" . "fennel")
     ("\\.mdx\\'" . "mdx")
     ("\\.nu$" . "nushell")
     ("\\.php$" . "php")