Moving to Doom Emacs!

.emacs.d/modules/lang/csharp/README.org

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+#+TITLE: :lang csharp
+
+* Table of Contents :TOC:
+- [[#description][Description]]
+  - [[#module-flags][Module Flags]]
+  - [[#plugins][Plugins]]
+- [[#prerequisites][Prerequisites]]
+  - [[#macos][MacOS]]
+  - [[#arch-linux][Arch Linux]]
+  - [[#nixos][NixOS]]
+
+* Description
+This module adds C# support to Emacs. Powered by omnisharp (directly or through
+LSP).
+
+** Module Flags
++ =+lsp= Enables omnisharp through LSP support (requires omnisharp).
++ =+unity= Enables special support for the [[https://unity.com/][Unity game engine]] (particularly,
+  support for HLSL shaders).
+
+** Plugins
++ [[https://github.com/josteink/csharp-mode][csharp-mode]]
++ [[https://github.com/OmniSharp/omnisharp-emacs][omnisharp]]* (not =+lsp=)
++ [[https://github.com/midnightSuyama/shader-mode][shader-mode]]* (=+unity=)
+
+* Prerequisites
+This module needs:
+
++ omnisharp (with the ~+lsp~ flag, this must be installed externally. Without
+  it, use ~M-x omnisharp-install-server~)
++ .NET SDKs (on Windows)
++ Mono (on UNIX platforms)
+
+** TODO MacOS
+** Arch Linux
+#+BEGIN_SRC sh
+sudo pacman --needed --noconfirm -S mono
+#+END_SRC
+** TODO NixOS

.emacs.d/modules/lang/csharp/autoload.el

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+;;; lang/csharp/autoload.el -*- lexical-binding: t; -*-
+
+;;;###autoload
+(defun +csharp-sp-point-in-type-p (id action context)
+  "Return t if point is in the right place for C# angle-brackets."
+  (and (sp-in-code-p id action context)
+       (cond ((eq action 'insert)
+              (sp-point-after-word-p id action context))
+             ((eq action 'autoskip)
+              (/= (char-before) 32)))))

.emacs.d/modules/lang/csharp/config.el

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+;;; lang/csharp/config.el -*- lexical-binding: t; -*-
+
+(after! csharp-mode
+  (add-hook 'csharp-mode-hook #'rainbow-delimiters-mode)
+
+  (when (featurep! +lsp)
+    (add-hook 'csharp-mode-local-vars-hook #'lsp!))
+
+  (set-electric! 'csharp-mode :chars '(?\n ?\}))
+  (set-rotate-patterns! 'csharp-mode
+    :symbols '(("public" "protected" "private")
+               ("class" "struct")))
+  (sp-local-pair 'csharp-mode "<" ">"
+                 :when '(+csharp-sp-point-in-type-p)
+                 :post-handlers '(("| " "SPC"))))
+
+
+(use-package! omnisharp
+  :unless (featurep! +lsp)
+  :hook (csharp-mode . omnisharp-mode)
+  :commands omnisharp-install-server
+  :preface
+  (setq omnisharp-auto-complete-want-documentation nil
+        omnisharp-cache-directory (concat doom-etc-dir "omnisharp"))
+  :config
+  (defun +csharp-cleanup-omnisharp-server-h ()
+    "Clean up the omnisharp server once you kill the last csharp-mode buffer."
+    (unless (doom-buffers-in-mode 'csharp-mode (buffer-list))
+      (omnisharp-stop-server)))
+  (add-hook! 'csharp-mode-hook
+    (add-hook 'kill-buffer-hook #'+csharp-cleanup-omnisharp-server-h nil t))
+
+  (set-company-backend! 'csharp-mode 'company-omnisharp)
+  (set-lookup-handlers! 'csharp-mode
+    :definition #'omnisharp-go-to-definition
+    :references #'omnisharp-find-usages
+    :documentation #'omnisharp-current-type-documentation)
+
+  (map! :localleader
+        :map omnisharp-mode-map
+        "b" #'omnisharp-recompile
+        (:prefix "r"
+          "u"  #'omnisharp-fix-usings
+          "r"  #'omnisharp-rename
+          "a"  #'omnisharp-show-last-auto-complete-result
+          "o"  #'omnisharp-show-overloads-at-point)
+        (:prefix "g"
+          "u"  #'omnisharp-find-usages
+          "i"  #'omnisharp-find-implementations
+          "f"  #'omnisharp-navigate-to-current-file-member
+          "m"  #'omnisharp-navigate-to-solution-member
+          "M"  #'omnisharp-navigate-to-solution-file-then-file-member
+          "F"  #'omnisharp-navigate-to-solution-file
+          "r"  #'omnisharp-navigate-to-region
+          "ti" #'omnisharp-current-type-information
+          "td" #'omnisharp-current-type-documentation)
+        (:prefix "t"
+          "s" #'omnisharp-unit-test-at-point
+          "l" #'omnisharp-unit-test-last
+          "b" #'omnisharp-unit-test-buffer)))
+
+
+;;;###package shader-mode
+(when (featurep! +unity)
+  ;; Unity shaders
+  (add-to-list 'auto-mode-alist '("\\.shader\\'" . shader-mode))
+
+  (def-project-mode! +csharp-unity-mode
+    :modes '(csharp-mode shader-mode)
+    :files (and "Assets" "Library/MonoManager.asset" "Library/ScriptMapper")))

.emacs.d/modules/lang/csharp/doctor.el

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+;; -*- lexical-binding: t; no-byte-compile: t; -*-
+;;; lang/csharp/doctor.el
+
+(require 'omnisharp)
+(let ((omnisharp-bin (or omnisharp-server-executable-path (omnisharp--server-installation-path t))))
+  (unless (file-exists-p omnisharp-bin)
+    (warn! "Omnisharp server isn't installed, completion won't work")))

.emacs.d/modules/lang/csharp/packages.el

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+;; -*- no-byte-compile: t; -*-
+;;; lang/csharp/packages.el
+
+(package! csharp-mode)
+
+(unless (featurep! +lsp)
+  (package! omnisharp))
+
+(when (featurep! +unity)
+  (package! shader-mode))