feat: added odin language support through ols (#4818)

* feat: added odin language support through ols

* fix: removed trace of omnisharp which i used as reference

* fix: had duplicate function from testing

* fix: f-join not handling nil

made the cond a pcase and gave a defulat of the linux versions

* fix: brace in wrong place

Author: samwdp

CHANGELOG.org

@@ -41,6 +41,7 @@
   * Add Python(ty) support
   * Add support for [[https://github.com/tombi-toml/tombi][Tombi language server]] (TOML language).
   * Make lsp-headerline--check-breadcrumb public
+  * Added Odin langauge server support [[https://github.com/DanielGavin/ols][ols]]
 
 ** 9.0.0
   * Add language server config for QML (Qt Modeling Language) using qmlls.

clients/lsp-odin.el

@@ -0,0 +1,114 @@
+;;; lsp-odin.el --- Description -*- lexical-binding: t; -*-
+;;
+;; Copyright (C) 2025 Sam Precious
+;;
+;; Author: Sam Precious <samwdp@gmail.com>
+;; Keywords: lsp, odin
+;;
+;; 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 Odin using the ols language server
+;;
+;;; Code:
+
+(require 'lsp-mode)
+(require 'f)
+
+(defgroup lsp-odin-ols nil
+  "LSP support for Odin, using ols."
+  :group 'lsp-mode
+  :link '(url-link "https://github.com/DanielGavin/ols")
+  :package-version '(lsp-mode . "9.0.0"))
+
+(defcustom lsp-odin-ols-download-url
+  (let ((suffix
+         (pcase system-type
+           ('windows-nt
+            (when (and (string-match "^x86_64-.*" system-configuration)
+                       (version<= "26.4" emacs-version))
+              "ols-x86_64-pc-windows-msvc.zip"))
+           ('darwin
+            (if (string-match "aarch64-.*" system-configuration)
+                "ols-arm64-darwin.zip"
+              "ols-x86_64-darwin.zip"))
+           (_
+            "ols-x86_64-unknown-linux-gnu"))))
+    (when suffix
+      (f-join "https://github.com/DanielGavin/ols/releases/download/nightly/"
+              suffix)))
+  "Automatic download url for ols language server."
+  :group 'lsp-odin-ols
+  :type 'string)
+
+(defcustom lsp-odin-ols-server-install-dir
+  (f-join lsp-server-install-dir "ols/")
+  "Installation directory for ols server."
+  :group 'lsp-odin-ols
+  :type 'directory)
+
+(defcustom lsp-odin-ols-store-path
+  (f-join lsp-odin-ols-server-install-dir "latest" "ols.zip")
+  "The path where ols .zip archive will be stored."
+  :group 'lsp-odin-ols
+  :type 'file)
+
+(defcustom lsp-odin-ols-server-dir
+  (f-join lsp-odin-ols-server-install-dir "latest" "ols")
+  "The path where ols .zip archive will be extracted."
+  :group 'lsp-odin-ols
+  :type 'file)
+
+(defcustom lsp-odin-ols-binary-path
+  (f-join lsp-odin-ols-server-install-dir "latest"
+          (pcase system-type
+            ('windows-nt
+             "ols-x86_64-pc-windows-msvc.exe")
+            ('darwin
+             (if (string-match "aarch64-.*" system-configuration)
+                 "ols-arm64-darwin"
+               "ols-x86_64-darwin"))
+            (_
+             "ols-x86_64-unknown-linux-gnu")))
+  "The path where ols binary after will be stored."
+  :group 'lsp-odin-ols
+  :type 'file)
+
+
+(lsp-dependency
+ 'ols
+ `(:download :url lsp-odin-ols-download-url
+             :decompress :zip
+             :store-path lsp-odin-ols-store-path
+             :binary-path lsp-odin-ols-binary-path
+             :set-executable? t)
+ '(:system "ols"))
+
+(defun lsp-odin--ols-download-server (_client callback error-callback _update?)
+  "Download zip package for ols and install it.
+Will invoke CALLBACK on success, ERROR-CALLBACK on error."
+  (lsp-package-ensure 'ols callback error-callback))
+
+(lsp-register-client
+ (make-lsp-client :new-connection (lsp-stdio-connection lsp-odin-ols-binary-path)
+                  :major-modes '(odin-mode odin-ts-mode)
+                  :language-id "odin"
+                  :activation-fn (lsp-activate-on "odin")
+                  :server-id 'ols
+                  :multi-root t
+                  :download-server-fn #'lsp-odin--ols-download-server))
+
+(provide 'lsp-odin)
+;;; lsp-odin.el ends here

docs/lsp-clients.json

@@ -798,6 +798,14 @@
     "installation-url": "https://github.com/ocaml-lsp/ocaml-language-server#server",
     "debugger": "Not available"
   },
+  {
+    "name": "ols",
+    "full-name": "Odin Language Server",
+    "server-name": "ols",
+    "server-url": "https://github.com/DanielGavin/ols",
+    "installation-url": "https://github.com/DanielGavin/ols",
+    "debugger": "Not available"
+  },
   {
     "name": "openscad",
     "full-name": "OpenSCAD",

lsp-mode.el

@@ -184,7 +184,7 @@ As defined by the Language Server Protocol 3.16."
      lsp-json lsp-kotlin lsp-kubernetes-helm lsp-latex lsp-lisp lsp-ltex
      lsp-ltex-plus lsp-lua lsp-fennel lsp-magik lsp-markdown lsp-marksman
      lsp-matlab lsp-mdx lsp-meson lsp-metals lsp-mint lsp-mojo lsp-move lsp-mssql
-     lsp-nextflow lsp-nginx lsp-nim lsp-nix lsp-nushell lsp-ocaml lsp-openscad
+     lsp-nextflow lsp-nginx lsp-nim lsp-nix lsp-nushell lsp-ocaml lsp-odin lsp-openscad
      lsp-pascal lsp-perl lsp-perlnavigator lsp-php lsp-pls lsp-postgres
      lsp-purescript lsp-pwsh lsp-pyls lsp-pylsp lsp-pyright lsp-python-ms lsp-python-ty
      lsp-qml lsp-r lsp-racket lsp-remark lsp-rf lsp-roc lsp-roslyn lsp-rubocop
@@ -1004,7 +1004,9 @@ Changes take effect only when a new session is started."
     (yang-mode . "yang")
     (matlab-mode . "matlab")
     (message-mode . "plaintext")
-    (mu4e-compose-mode . "plaintext"))
+    (mu4e-compose-mode . "plaintext")
+    (odin-mode . "odin")
+    (odin-ts-mode . "odin"))
   "Language id configuration.")
 
 (defvar lsp--last-active-workspaces nil

mkdocs.yml

@@ -132,6 +132,7 @@ nav:
     - Nix (nil): page/lsp-nix-nil.md
     - Nushell: page/lsp-nushell.md
     - OCaml (ocaml-lsp): page/lsp-ocaml-lsp-server.md
+    - Odin (ols): page/lsp-odin-ols-server.md
     - OpenSCAD: page/lsp-openscad.md
     - Pascal/Object Pascal: page/lsp-pascal.md
     - Perl (PLS): page/lsp-pls.md