Add support for the C family

nix/modules/c-family/default.nix

@@ -0,0 +1,52 @@
+# Fg42 - Emacs Editor for advance users
+#
+# Copyright (c) 2010-2024 Sameer Rahmani <lxsameer@gnu.org>
+#
+# 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, version 2.
+#
+# 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 <http://www.gnu.org/licenses/>.
+
+# This is the home manager module that exposes FG42. It differs
+# from FG42 modules that are structurally the same but used in
+# different context
+
+# A list of default FG42 modules to build FG42 with.
+{ lib, config, pkgs, makeFG42Drv, ... }:
+with lib;
+let
+  cfg = config.fg42.c-family;
+
+  deps =
+    (with pkgs.emacsPackages; [
+      eldoc-cmake
+      ninja-mode
+    ]);
+
+  drv = makeFG42Drv {
+    pname = "c-family";
+    version = config.fg42.version;
+    buildInputs = deps;
+    src = ./.;
+  };
+in
+{
+  options.fg42.c-family.enable = mkAndEnableOption "c-family";
+
+  config = mkIf cfg.enable {
+    fg42.elispPackages = [ drv ] ++ deps;
+
+    fg42.paths = (with pkgs;[
+      cmake-language-server
+    ]);
+
+    fg42.requires = [ drv.pname ];
+  };
+}

nix/modules/c-family/lisp/fg42/c-family.el

@@ -0,0 +1,93 @@
+;;; FG42 --- The mighty editor for the emacsians -*- lexical-binding: t; -*-
+;;
+;; Copyright (c) 2010-2024 Sameer Rahmani & Contributors
+;;
+;; Author: Sameer Rahmani <lxsameer@gnu.org>
+;; URL: https://devheroes.codes/FG42/FG42
+;; Version: 4.0.0
+;;
+;; 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 <http://www.gnu.org/licenses/>.
+;;
+;;; Commentary:
+;;; Code:
+(eval-when-compile
+  (require 'fpkg))
+
+(defvar fg42/clangd-args
+  (list
+   (format "-j=%s" (- (num-processors) 2))
+   "--clang-tidy"
+   "--header-insertion=iwyu"
+   "--pch-storage=memory"
+   "--background-index"
+   "--cross-file-rename"
+   "--completion-style=detailed")
+  "Arguments to pass to clangd.")
+
+(use! cmake-ts-mode
+  "Enable cmake-ts-mode instead of the non-TS version."
+  :mode ("\\(?:CMakeLists\\.txt\\|\\.cmake\\)\\'" . cmake-ts-mode)
+  :hook ((cmake-ts-mode . fg42/autocomplete)
+         (cmake-ts-mode . fg42/ensure-lang-server)))
+
+
+(use! eldoc-cmake
+  "ElDoc and cmake integration"
+  :hook (cmake-ts-mode . eldoc-cmake-enable))
+
+
+(use! ninja-mode
+  "This cube enables Ninja integration with FG42. For more info checkout:
+https://github.com/ninja-build/ninja/blob/master/misc/ninja-mode.el")
+
+
+(defun fg42/c_cpp_ls (_)
+  "Return the proper lang server fo C/C++.
+By default it will return `clangd' or `ccls' depends on what you have
+installed.  If you set `CPP_LS' env variable, then the value of that
+var will be used instead.  You can use `add-advice' to change the
+return value of this function as well."
+    (let ((ls (getenv "CPP_LS")))
+      (if (null ls)
+          (eglot-alternatives `(("clangd" ,@fg42/clangd-args) ("ccls")))
+        (split-string ls " "))))
+
+
+;;;###autoload
+(defun fg42/c-ts-mode-setup ()
+  "A hook handler to setup cpp related configurations."
+  (message "[FG42][C/C++]: Make sure to setup clangd to fit your needs. For more info: https://clangd.llvm.org/config")
+
+  (fg42/ensure-lang-server)
+  (when (and (boundp 'eglot-managed-p) (eglot-managed-p))
+    (add-to-list 'eglot-server-programs
+                 `(c++-ts-mode . ,#'fg42/c_cpp_ls))))
+
+
+(use! c-ts-mode
+  "C++ setup. We're using treesitter version of c++ mode."
+  :init
+  ;; Remap the standard C/C++ modes
+  (add-to-list 'major-mode-remap-alist '(c-mode . c-ts-mode))
+  (add-to-list 'major-mode-remap-alist '(c++-mode . c++-ts-mode))
+  (add-to-list 'major-mode-remap-alist '(c-or-c++-mode . c-or-c++-ts-mode))
+
+  :hook
+  (c++-ts-mode . fg42/autocomplete)
+  (c++-ts-mode . fg42/c-ts-mode-setup)
+  (c++-ts-mode . flyspell-prog-mode))
+
+
+(provide 'fg42/c-family)
+;;; c-family.el ends here

nix/modules/default.nix

@@ -31,6 +31,7 @@ let
     ./autocomplete
     ./language-server
     ./nix
+    ./c-family
   ];
 
   pkgsModule = { config, ... }: {

nix/modules/editor/default.nix

@@ -31,6 +31,7 @@ let
       projectile-ripgrep
       pkg-info
       expand-region
+      direnv
       helpful
       envrc
       pinentry
@@ -71,6 +72,7 @@ in
     fg42.paths = (with pkgs;[
       ripgrep
       dicts
+      direnv
     ]);
 
     fg42.font = {

nix/modules/editor/lisp/fg42/editor.el

@@ -198,9 +198,16 @@ contextual information."
   "It is a rainbow parentheses like mode which highlights delimiters such as
  parentheses, brackets or braces according to their depth."
   ;; Enable rainbow-delimiters for programming
+  :commands rainbow-delimiters-mode
   :hook (prog-mode-hook . rainbow-delimiters-mode))
 
 
+(use! direnv
+  "Direnv integration for FG42."
+  :config
+  (direnv-mode))
+
+
 (defun fg42/setup-editor ()
   "Setup the overall functionality of FG42."
 

nix/modules/elisp/default.nix

@@ -35,5 +35,10 @@ let
 
 in
 {
+  imports = [
+    ../language-server
+  ];
+
   fg42.elispPackages = [ drv ] ++ deps;
+  fg42.requires = [ drv.pname ];
 }

nix/modules/elisp/lisp/fg42/elisp.el

@@ -29,11 +29,15 @@
   "Evaluation Result OverlayS for Emacs Lisp."
   :commands eros-mode)
 
+(use! paredit
+  "Minor mode for editing parentheses."
+  :commands enable-paredit-mode)
+
 (use! elisp-mode
   "Elisp mode."
   :hook
   ((emacs-lisp-mode . rainbow-delimiters-mode)
-   (emacs-lisp-mode . paredit-mode)
+   (emacs-lisp-mode . enable-paredit-mode)
    ;; (emacs-lisp-mode . company-mode)
    (emacs-lisp-mode . eros-mode)))
 

nix/modules/language-server/lisp/fg42/language-server.el

@@ -34,10 +34,13 @@ shipped with Emacs."
 
 (use! eldoc-box
   "View eldoc stuff in a frame."
-  :commands eldoc-box-hover-mode)
+  :commands eldoc-box-hover-mode
+  :hook (eldoc-mode . eldoc-box-hover-mode))
+
 
 (use! markdown-mode
-  "Renders markdown in Emacs.")
+  "Renders markdown in Emacs."
+  :init (setq markdown-command "multimarkdown"))
 
 
 ;;;###autoload
@@ -53,6 +56,7 @@ or via `use!' `:hook'."
   (interactive)
   ;; TODO: Configure LSP here as an alternative here by looking at
   ;; the configs in `fg42/config'
+
   (add-hook 'eglot-managed-mode-hook #'eldoc-box-hover-mode t)
   (eglot-ensure))
 

nix/modules/unit/default.nix

@@ -24,6 +24,10 @@ with lib;
 let
   cfg = config.fg42;
 
+  deps = (with pkgs.emacsPackages; [
+    treesit-grammars.with-all-grammars
+  ]);
+
   drv = makeFG42Drv {
     pname = "unit";
     version = config.fg42.version;
@@ -179,7 +183,7 @@ in
 
   config = {
     fg42.version = import ../../version.nix { };
-    fg42.elispPackages = [ drv ];
+    fg42.elispPackages = [ drv ] ++ deps;
     fg42.theme = lib.mkDefault "base16-eighties";
     fg42.theme-package-name = lib.mkDefault "base16-theme";
 
@@ -192,20 +196,6 @@ in
       '')
     ];
 
-    # Extract the package pname's to pass to elisp to `require` them in the init
-    # file, while compiling.
-    # fg42.requires = map nix2elispName config.fg42.elispPackages;
-    # fg42.docstrings = (with builtins;
-    #   let
-    #     desc = opt:
-    #       if hasAttr "description" opt
-    #       then opt.description
-    #       else "";
-
-    #   in
-    #   lib.concatMapAttrs
-    #     (k: v: { ${k} = desc v; })
-    #     options.fg42);
   };
 
 }