lang/cc: add irony install bootstrap

modules/lang/cc/packages.el

@@ -17,3 +17,44 @@
 (when (featurep! :completion company)
   (package! company-irony)
   (package! company-irony-c-headers))
+
+;;
+(def-bootstrap! cc
+  ;; NOTE Untested
+  (require! :lang cc)
+  (require 'irony)
+  (unless (expand-file-name "bin/irony-server" irony-server-install-prefix)
+    (pcase (doom-system-os)
+      ('arch
+       (let (pkgs)
+         (unless (executable-find "cmake")
+           (push "cmake" pkgs))
+         (unless (file-exists-p "/usr/lib/libclang.so")
+           (push "clang" pkgs))
+         (when pkgs
+           (sudo "pacman --noconfirm -S %s" pkgs))))
+      ('debian) ;; TODO
+      ('macos
+       (unless (executable-find "cmake")
+         (sh "brew install cmake"))
+       (unless (file-exists-p "/usr/loacl/opt/llvm/lib/libclang.dylib")
+         ;; Since installing llvm is a _huge_ undertaking for homebrew, we force
+         ;; you to install it manually.
+         (error "libclang.so not found. Run `brew install llvm` first, then retry"))))
+    (let ((default-directory (concat (file-name-as-directory temporary-file-directory)
+                                     (file-name-as-directory (format "build-irony-server-%s" (irony-version))))))
+      (irony-install-server
+       (format (concat "%s "
+                       (when IS-MAC "-DCMAKE_INSTALL_RPATH_USE_LINK_PATH=ON ")
+                       "-DCMAKE_INSTALL_PREFIX='%s' "
+                       "%s && %s --build . "
+                       "--use-stderr --config Release --target install")
+               (shell-quote-argument irony-cmake-executable)
+               (shell-quote-argument (expand-file-name irony-server-install-prefix))
+               (shell-quote-argument irony-server-source-dir)
+               (shell-quote-argument irony-cmake-executable)))
+      (when IS-MAC
+        (sh (format "install_name_tool -change @rpath/libclang.dylib %s %s"
+                    "/usr/local/opt/llvm/lib/libclang.dylib"
+                    (expand-file-name "bin/irony-server" irony-server-install-prefix)))))
+    t))