Add support for Nushell (#4303)

Co-authored-by: Jen-Chieh Shen <[email protected]>

CHANGELOG.org

@@ -109,6 +109,8 @@
   * Add Hylang support.
   * Add support for clojure-ts derived modes.
   * Add support for installing Ada Language Server.
+  * Add Nushell support
+
 ** Release 8.0.0
   * Add ~lsp-clients-angular-node-get-prefix-command~ to get the Angular server from another location which is still has ~/lib/node_modules~ in it.
   * Set ~lsp-clients-angular-language-server-command~ after the first connection to speed up subsequent connections.

clients/lsp-nushell.el

@@ -0,0 +1,59 @@
+;;; lsp-nushell.el --- lsp-mode ansible integration -*- lexical-binding: t; -*-
+
+;; Copyright (C) 2024 emacs-lsp maintainers
+
+;; Author: lsp-mode maintainers
+;; Keywords: lsp, nushell
+
+;; 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 the nushell Language
+
+;;; Code:
+
+(require 'lsp-mode)
+
+(defgroup lsp-nushell nil
+  "LSP support for nushell."
+  :group 'lsp-mode
+  :link '(url-link "https://github.com/nushell/nushell"))
+
+(defcustom lsp-nushell-language-server-command
+  '("nu" "--lsp")
+  "The command that starts the nushell language server."
+  :type '(repeat :tag "List of string values" string)
+  :group 'lsp-nushell)
+
+(lsp-register-client
+ (make-lsp-client :new-connection (lsp-stdio-connection lsp-nushell-language-server-command)
+                  :activation-fn (lsp-activate-on "nushell")
+                  :priority -1
+                  :initialized-fn (lambda (workspace)
+                                    ;; Nushell server returns an empty list of
+                                    ;; completion options at initialization
+                                    ;; so completionProvider capability is {}
+                                    ;; When using plists, this value is parsed as
+                                    ;; null/nil so we need to force it to "t"
+                                    ;; to enable completion
+                                    (let ((caps (lsp--workspace-server-capabilities workspace)))
+                                      (unless (lsp-get caps :completionProvider)
+                                        (lsp:set-server-capabilities-completion-provider? caps t))))
+                  :server-id 'nushell-ls))
+
+(lsp-consistency-check lsp-nushell)
+
+(provide 'lsp-nushell)
+;;; lsp-nushell.el ends here

docs/lsp-clients.json

@@ -654,6 +654,14 @@
     "installation": "nix-env -i nil || nix profile install nixpkgs#nil",
     "debugger": "Not available"
   },
+  {
+    "name": "nushell",
+    "full-name": "Nushell",
+    "server-name": "nu",
+    "server-url": "https://github.com/nushell/nushell/tree/main/crates/nu-lsp",
+    "installation": "It is included in Nushell >= 0.87.0",
+    "debugger": "Not available"
+  },
   {
     "name": "ocaml",
     "full-name": "OCaml",

lsp-mode.el

@@ -183,7 +183,7 @@ As defined by the Language Server Protocol 3.16."
      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-mojo lsp-metals
-     lsp-mssql lsp-ocaml lsp-openscad lsp-pascal lsp-perl lsp-perlnavigator
+     lsp-mssql lsp-nushell 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
@@ -780,6 +780,7 @@ Changes take effect only when a new session is started."
     ("\\.jq$"  . "jq")
     ("\\.lua$" . "lua")
     ("\\.mdx\\'" . "mdx")
+    ("\\.nu$" . "nushell")
     ("\\.php$" . "php")
     ("\\.rs\\'" . "rust")
     ("\\.spec\\'" . "rpm-spec")
@@ -954,7 +955,9 @@ Changes take effect only when a new session is started."
     (wgsl-mode . "wgsl")
     (jq-mode . "jq")
     (jq-ts-mode . "jq")
-    (protobuf-mode . "protobuf"))
+    (protobuf-mode . "protobuf")
+    (nushell-mode . "nushell")
+    (nushell-ts-mode . "nushell"))
   "Language id configuration.")
 
 (defvar lsp--last-active-workspaces nil

mkdocs.yml

@@ -113,6 +113,7 @@ nav:
     - Nix (nixd-lsp): page/lsp-nix-nixd.md
     - Nix (rnix-lsp): page/lsp-nix-rnix.md
     - Nix (nil): page/lsp-nix-nil.md
+    - Nushell: page/lsp-nushell.md
     - OCaml (ocaml-lsp): page/lsp-ocaml-lsp-server.md
     - OpenSCAD: page/lsp-openscad.md
     - Pascal/Object Pascal: page/lsp-pascal.md