module: add :lang ada

modules/lang/ada/README.org

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+:PROPERTIES:
+:ID:       0903d239-7eab-47d7-8b88-00420fe6a50f
+:END:
+#+title:     :lang ada
+#+subtitle:  In strong typing we (blindly) trust
+#+created:   September 13, 2025
+#+since:     25.10.0
+
+* Description :unfold:
+This module adds support for the Ada and SPARK programming languages.
+
+- Syntax highlighting (optionally via tree-sitter)
+- Code completion (via company or corfu)
+- LSP support (with [[https://github.com/AdaCore/ada_language_server][ada_language_server]])
+- Alire integration (alr build, alr run, alr clean)
+
+** Maintainers
+*This module needs a maintainer.* [[doom-contrib-maintainer:][Become a maintainer?]]
+
+** Module flags
+# Flags should be in alphanumerical order.
+- +lsp ::
+  Enable LSP support for ~ada-mode~ / ~ada-ts-mode~. Requires [[doom-module::tools lsp]]
+  and a langserver (supports [[https://github.com/AdaCore/ada_language_server][ada_language_server]]).
+- +tree-sitter ::
+  Leverages tree-sitter for better syntax highlighting and structural text
+  editing. Requires [[doom-module::tools tree-sitter]] and Emacs 29.1+.
+
+** Packages
+- [[doom-package:ada-mode]]
+- [[doom-package:ada-ts-mode]] if [[doom-module:+tree-sitter]]
+
+** Hacks
+- ~ada-ts-mode~ has been advised not to set ~treesit-language-source-alist~ and
+  ~eglot-server-programs~ buffer-locally, because this overrides global settings
+  (by the user or Doom modules) in a non-standard way.
+
+** TODO Changelog
+# This section will be machine generated. Don't edit it by hand.
+/This module does not have a changelog yet./
+
+* Installation
+[[id:01cffea4-3329-45e2-a892-95a384ab2338][Enable this module in your ~doom!~ block.]]
+
+#+begin_quote
+󱌣 /No installation steps have been documented./ [[doom-contrib-module:][Document them?]]
+#+end_quote
+
+* Usage
+#+begin_quote
+󱌣 This module has no usage documentation yet. [[doom-contrib-module:][Write some?]]
+#+end_quote
+
+* TODO Configuration
+#+begin_quote
+󱌣 This module has no configuration documentation yet. [[doom-contrib-module:][Write some?]]
+#+end_quote
+
+* Troubleshooting
+/There are no known problems with this module./ [[doom-report:][Report one?]]
+
+* Frequently asked questions
+/This module has no FAQs yet./ [[doom-suggest-faq:][Ask one?]]
+
+* TODO Appendix
+#+begin_quote
+󱌣 This module has no appendix yet. [[doom-contrib-module:][Write one?]]
+#+end_quote

modules/lang/ada/auoload.el

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+;;; lang/ada/auoload.el -*- lexical-binding: t; -*-
+
+(defun +ada--barf-unless-project ()
+  (unless (locate-dominating-file defaul-directory "alire.toml")
+    (user-error "Not inside an Alire project")))
+
+
+;;;###autoload
+(defun +ada/alr-build ()
+  "Run 'alr build' in the current project."
+  (interactive)
+  (+ada--barf-unless-project)
+  (compile "alr build"))
+
+;;;###autoload
+(defun +ada/alr-run ()
+  "Run 'alr run' in the current project."
+  (interactive)
+  (+ada--barf-unless-project)
+  (compile "alr run"))
+
+;;;###autoload
+(defun +ada/alr-clean ()
+  "Run 'alr clean' in the current project."
+  (interactive)
+  (+ada--barf-unless-project)
+  (compile "alr clean"))

modules/lang/ada/config.el

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+;;; lang/ada/config.el -*- lexical-binding: t; -*-
+
+;;
+;;; Packages
+
+(defun +ada-common-config (mode)
+  (when (modulep! +lsp)
+    (add-hook (intern (format "%s-local-vars-hook" mode)) #'lsp! 'append))
+
+  (map! :map ,(intern (format "%s-map" mode))
+        :localleader
+        :desc "Build Alire Project" "b" #'+ada/alr-build
+        :desc "Run Alire Project"   "r" #'+ada/alr-run
+        :desc "Clean Alire Project" "c" #'+ada/alr-clean))
+
+
+(use-package! ada-mode
+  :mode "\\.gpr\\'"
+  :config
+  (+ada-common-config 'ada-mode))
+
+
+(use-package! ada-ts-mode
+  :when (modulep! +tree-sitter)
+  :defer t
+  :init
+  (set-tree-sitter! 'ada-mode 'ada-ts-mode
+    '((ada :url "https://github.com/briot/tree-sitter-ada")))
+  :config
+  (+ada-common-config 'ada-ts-mode)
+
+  (setq ada-ts-mode-grammar-install nil)  ; redundant w/ `treesit-auto-install-grammar'
+
+  ;; HACK: `ada-ts-mode' sets buffer-local values for
+  ;;   `treesit-language-source-alist' and `eglot-server-program' during major
+  ;;   mode activation. This is poor ettiquite, overshadowing any user changes
+  ;;   to the global values of these variables. Not to mention, it's redundant
+  ;;   with ~set-tree-sitter!~ and ~eglot~ already handling support for
+  ;;   ada-ts-mode.
+  ;; REVIEW: Undo buffer-local changes to these variables upstream.
+  (defadvice! +ada--suppress-side-effects-a (&rest _)
+    :after #'ada-ts-mode
+    (kill-local-variable 'treesit-language-source-alist)
+    (kill-local-variable 'eglot-server-programs)))

modules/lang/ada/doctor.el

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+;;; lang/ada/doctor.el -*- lexical-binding: t; -*-
+
+(unless (executable-find "alr")
+  (warn! "Alire (alr) not found in $PATH"))
+
+(when (modulep! +lsp)
+  (unless (executable-find "ada_language_server")
+    (warn! "ada_language_server not found in $PATH; LSP support won't work")))

modules/lang/ada/packages.el

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+;; -*- no-byte-compile: t; -*-
+;;; lang/ada/packages.el
+
+(package! ada-mode :pin "ce8a2dfebc2b738f32b61dbe2668f7acb885db93")
+(when (and (modulep! +tree-sitter) (treesit-available-p))
+  (package! ada-ts-mode :pin "d0c1c124b236b402b884188948cb1f3502ef8779"))