Add :lang zig module

docs/modules.org

@@ -151,6 +151,7 @@ Modules that bring support for a language or group of languages to Emacs.
 + terra - TODO
 + web =+lsp= - HTML and CSS (SCSS/SASS/LESS/Stylus) support.
 + [[file:../modules/lang/yaml/README.org][yaml]] =+lsp= - TODO
++ [[file:../modules/lang/zig/README.org][zig]] =+lsp= - Zig support.
 
 
 * :os

init.example.el

@@ -167,6 +167,7 @@
        ;;terra             ; Earth and Moon in alignment for performance.
        ;;web               ; the tubes
        ;;yaml              ; JSON, but readable
+       ;;zig               ; C, but simpler
 
        :email
        ;;(mu4e +gmail)

modules/lang/zig/config.el

@@ -0,0 +1,34 @@
+;;; lang/zig/config.el -*- lexical-binding: t; -*-
+
+(after! projectile
+  (pushnew! projectile-project-root-files "build.zig"))
+
+
+;;
+;; zig-mode
+
+(use-package! zig-mode
+  :mode "\\.zig$"
+  :hook (zig-mode . rainbow-delimiters-mode)
+  :config
+  ;; Disable zig-mode's default format on save behaviour.
+  (setq zig-format-on-save nil)
+  (when (featurep! +lsp)
+    (add-hook 'zig-mode-local-vars-hook #'lsp!)))
+
+(map! :localleader
+      (:after zig-mode
+        :map zig-mode-map
+        "b" #'zig-compile
+        "f" #'zig-format-buffer
+        "r" #'zig-run
+        "t" #'zig-test-buffer))
+
+(when (featurep! :checkers syntax)
+  (flycheck-define-checker zig
+    "A zig syntax checker using the zig-fmt interpreter."
+    :command ("zig" "fmt" (eval (buffer-file-name)))
+    :error-patterns
+    ((error line-start (file-name) ":" line ":" column ": error: " (message) line-end))
+    :modes zig-mode)
+  (add-to-list 'flycheck-checkers 'zig))

modules/lang/zig/doctor.el

@@ -0,0 +1,13 @@
+;; -*- lexical-binding: t; no-byte-compile: t; -*-
+;;; lang/zig/doctor.el
+
+(assert! (or (not (featurep! +lsp))
+             (featurep! :tools lsp))
+         "This module requires (:tools lsp)")
+
+(unless (executable-find "zig")
+  (warn! "Couldn't find zig binary"))
+
+(when (featurep! +lsp)
+  (unless (executable-find "zls")
+    (warn! "Couldn't find zls binary")))

modules/lang/zig/packages.el

@@ -0,0 +1,4 @@
+;; -*- no-byte-compile: t; -*-
+;;; lang/zig/packages.el
+
+(package! zig-mode :pin "6f10653cc17b9c74150ac2f6833eaaaf55488398")