From db54f20da51db2b3d8264ba42c55ce060ce21f6c Mon Sep 17 00:00:00 2001
From: Julia DeMille <8127111+judemille@users.noreply.github.com>
Date: Thu, 2 May 2024 13:52:42 -0500
Subject: [PATCH] Add support for mesonlsp (#4442)

---
 CHANGELOG.org         |   1 +
 clients/lsp-meson.el  | 126 ++++++++++++++++++++++++++++++++++++++++++
 docs/lsp-clients.json |   8 +++
 lsp-mode.el           |   2 +-
 mkdocs.yml            |   1 +
 5 files changed, 137 insertions(+), 1 deletion(-)
 create mode 100644 clients/lsp-meson.el

diff --git a/CHANGELOG.org b/CHANGELOG.org
index 1ef6ae56d9..e7629a2319 100644
--- a/CHANGELOG.org
+++ b/CHANGELOG.org
@@ -2,6 +2,7 @@
 ** Unreleased 9.0.1
   * Add support for GNAT Project (~gpr-mode~, ~gpr-ts-mode~).
   * Add SQL support
+  * Add support for Meson build system. (~meson-mode~).
 ** 9.0.0
   * Add language server config for QML (Qt Modeling Language) using qmlls.
   * Add new configuration options for lsp-html. Now able to toggle documentation hovers. Custom data is no longer experimental, and is now a vector.
diff --git a/clients/lsp-meson.el b/clients/lsp-meson.el
new file mode 100644
index 0000000000..00ffa01373
--- /dev/null
+++ b/clients/lsp-meson.el
@@ -0,0 +1,126 @@
+;;; lsp-meson.el --- lsp client for meson -*- lexical-binding: t; -*-
+
+;; Copyright (C) 2024 emacs-lsp maintainers
+
+;; Author: emacs-lsp maintainers
+;; Keywords: lsp, meson
+
+;; 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 Meson language.
+;;
+;;; Code:
+
+(require 'lsp-mode)
+
+(defgroup lsp-meson nil
+  "LSP support for Meson."
+  :group 'lsp-mode
+  :link '(url-link "https://github.com/JCWasmx86/mesonlsp"))
+
+(defcustom lsp-meson-server-executable '("mesonlsp")
+  "The meson language server executable to use."
+  :group 'lsp-meson
+  :risky t
+  :type '(repeat string))
+
+(defcustom lsp-meson-ignore-subproject-diagnostics nil
+  "Ignore diagnostics from subprojects."
+  :type '(choice
+          (const :tag "Off" nil)
+          (const :tag "All subprojects" t)
+          (lsp-repeatable-vector :tag "Specific subprojects" string))
+  :group 'lsp-meson)
+
+(defcustom lsp-meson-no-auto-downloads nil
+  "Never automatically download subprojects/wraps."
+  :type '(boolean)
+  :group 'lsp-meson)
+
+(defcustom lsp-meson-disable-inlay-hints nil
+  "Disable inlay hints."
+  :type '(boolean)
+  :group 'lsp-meson)
+
+(defgroup lsp-meson-linting nil
+  "Linting settings for mesonlsp."
+  :group 'lsp-meson)
+
+(defcustom lsp-meson-disable-name-linting nil
+  "Disable checking whether variable names are snake_case."
+  :type '(boolean)
+  :group 'lsp-meson-linting)
+
+(defcustom lsp-meson-disable-all-id-lints nil
+  "Disable linting for unknown string literals relating to compiler/machine IDs."
+  :type '(boolean)
+  :group 'lsp-meson-linting)
+
+(defcustom lsp-meson-disable-compiler-id-linting nil
+  "Disable lints for unknown IDs compared against `compiler.get_id()'."
+  :type '(boolean)
+  :group 'lsp-meson-linting)
+
+(defcustom lsp-meson-disable-compiler-argument-id-linting nil
+  "Disable lints for unknown IDs compared against `compiler.get_argument_syntax()'."
+  :type '(boolean)
+  :group 'lsp-meson-linting)
+
+(defcustom lsp-meson-disable-linker-id-linting nil
+  "Disable lints for unknown IDs compared against `compiler.get_linker_id()'."
+  :type '(boolean)
+  :group 'lsp-meson-linting)
+
+(defcustom lsp-meson-disable-cpu-family-linting nil
+  "Disable lints for unknown IDs compared against `X_machine.cpu_family()'."
+  :type '(boolean)
+  :group 'lsp-meson-linting)
+
+(defcustom lsp-meson-disable-os-family-linting nil
+  "Disable lints for unknown IDs compared against `X_machine.system()'."
+  :type '(boolean)
+  :group 'lsp-meson-linting)
+
+(defun lsp-meson--make-init-options ()
+  "Init options for mesonlsp."
+  `(:others (:ignoreDiagnosticsFromSubprojects
+             ,(if (vectorp lsp-meson-ignore-subproject-diagnostics)
+                  lsp-meson-ignore-subproject-diagnostics
+                (lsp-json-bool lsp-meson-ignore-subproject-diagnostics))
+             :neverDownloadAutomatically ,(lsp-json-bool lsp-meson-no-auto-downloads)
+             :disableInlayHints ,(lsp-json-bool lsp-meson-disable-inlay-hints))
+    :linting (:disableNameLinting ,(lsp-json-bool lsp-meson-disable-name-linting)
+              :disableAllIdLinting ,(lsp-json-bool lsp-meson-disable-all-id-lints)
+              :disableCompilerIdLinting ,(lsp-json-bool lsp-meson-disable-compiler-id-linting)
+              :disableCompilerArgumentIdLinting ,(lsp-json-bool lsp-meson-disable-compiler-argument-id-linting)
+              :disableLinkerIdLinting ,(lsp-json-bool lsp-meson-disable-linker-id-linting)
+              :disableCpuFamilyLinting ,(lsp-json-bool lsp-meson-disable-cpu-family-linting)
+              :disableOsFamilyLinting ,(lsp-json-bool lsp-meson-disable-os-family-linting))))
+
+(lsp-register-client
+ (make-lsp-client
+  :new-connection (lsp-stdio-connection (lambda () (append lsp-meson-server-executable '("--lsp"))))
+  :activation-fn (lsp-activate-on "meson")
+  :multi-root nil
+  :priority -1
+  :major-modes '(meson-mode)
+  :initialization-options #'lsp-meson--make-init-options
+  :server-id 'mesonlsp))
+
+(lsp-consistency-check lsp-meson)
+
+(provide 'lsp-meson)
+;;; lsp-meson.el ends here
diff --git a/docs/lsp-clients.json b/docs/lsp-clients.json
index 739b20cce6..decd95185a 100644
--- a/docs/lsp-clients.json
+++ b/docs/lsp-clients.json
@@ -591,6 +591,14 @@
     "installation-url": "https://github.com/artempyanykh/marksman",
     "debugger": "Not available"
   },
+  {
+    "name": "meson",
+    "full-name": "Meson",
+    "server-name": "mesonlsp",
+    "server-url": "https://github.com/JCWasmx86/mesonlsp",
+    "installation-url": "https://github.com/JCWasmx86/mesonlsp",
+    "debugger": "Not available"
+  },
   {
     "name": "millet",
     "full-name": "Standard ML (Millet)",
diff --git a/lsp-mode.el b/lsp-mode.el
index 9893caa2b2..6a50af0bbd 100644
--- a/lsp-mode.el
+++ b/lsp-mode.el
@@ -181,7 +181,7 @@ As defined by the Language Server Protocol 3.16."
      lsp-gdscript lsp-gleam lsp-glsl lsp-go lsp-golangci-lint lsp-grammarly
      lsp-graphql lsp-groovy lsp-hack lsp-haskell lsp-haxe lsp-idris lsp-java
      lsp-javascript lsp-jq lsp-json lsp-kotlin lsp-latex lsp-lisp lsp-ltex
-     lsp-lua lsp-magik lsp-markdown lsp-marksman lsp-mdx lsp-metals lsp-mint
+     lsp-lua lsp-magik lsp-markdown lsp-marksman lsp-mdx lsp-meson lsp-metals lsp-mint
      lsp-mojo lsp-move lsp-mssql lsp-nginx lsp-nim lsp-nix lsp-nushell lsp-ocaml
      lsp-openscad lsp-pascal lsp-perl lsp-perlnavigator lsp-php lsp-pls
      lsp-purescript lsp-pwsh lsp-pyls lsp-pylsp lsp-pyright lsp-python-ms
diff --git a/mkdocs.yml b/mkdocs.yml
index fe28a7e520..d24b22498f 100644
--- a/mkdocs.yml
+++ b/mkdocs.yml
@@ -108,6 +108,7 @@ nav:
     - Magik: page/lsp-magik.md
     - Markdown: page/lsp-markdown.md
     - Marksman: page/lsp-marksman.md
+    - Meson: page/lsp-meson.md
     - Move: page/lsp-move.md
     - MDX: page/lsp-mdx.md
     - MSSQL: https://emacs-lsp.github.io/lsp-mssql