From 8dba697a2c9e3b5c9f0fcb45e155adb6243ad609 Mon Sep 17 00:00:00 2001
From: Joel Grunbaum <joelgrun@gmail.com>
Date: Wed, 22 Dec 2021 07:39:02 +0000
Subject: [PATCH] Help flycheck find project root

---
 config.org |   64 ++++++++++++++++++++-----------
 1 files changed, 41 insertions(+), 23 deletions(-)

diff --git a/config.org b/config.org
index 9d8cd82..ed49c9e 100644
--- a/config.org
+++ b/config.org
@@ -796,7 +796,6 @@
   :config
   (flycheck-pos-tip-mode))
 #+END_SRC
-
 ** Company
 Company is auto-complete for Emacs.
 Uses various backends, more of which are added later.
@@ -813,11 +812,12 @@
 ** LSP Mode
 Use LSP for completion suggestions.
 Causes too much memory usage, need to debug.
+Need to generate ~compile_flags~ for c/c++, can use ~bear~ but may need other tools.
 #+BEGIN_SRC emacs-lisp
   (use-package lsp-mode
     :ensure t
     :hook (((c-mode
-             cpp-mode
+             c++-mode
              tex-mode
              latex-mode
              TeX-mode
@@ -835,11 +835,11 @@
     (setq lsp-completion-provider :capf)
     (setq lsp-keep-workspace-alive 'nil)
     (add-to-list 'exec-path "~/.cargo/bin"))
-  
+
   (use-package lsp-ui
     :ensure t
     :commands lsp-ui-mode)
-  
+
   (use-package helm-lsp
     :ensure t
     :commands helm-lsp-workspace-symbol)
@@ -960,7 +960,8 @@
 
 ** Language specific configs
 *** C/C++
-**** Flycheck clang
+**** Flycheck
+***** Flycheck clang
 Add the clang backend for linting.
 #+BEGIN_SRC emacs-lisp
   (use-package flycheck-clang-analyzer
@@ -971,8 +972,25 @@
       (require 'flycheck-clang-analyzer)
        (flycheck-clang-analyzer-setup)))
 #+END_SRC
+***** Flycheck project root
+Flycheck tends to fail finding the project root, giving errors about missing files.
+This should remove them.
+#+BEGIN_SRC emacs-lisp
+  (defun setup-flycheck-project-path ()
+    (let ((root (ignore-errors (projectile-project-root))))
+      (when root
+        (add-to-list
+         (make-variable-buffer-local 'flycheck-clang-include-path)
+         root)
+        (add-to-list
+         (make-variable-buffer-local 'flycheck-gcc-include-path)
+         root))))
 
-**** Company
+  (add-hook 'c-mode-hook 'setup-flycheck-project-path)
+  (add-hook 'c++-mode-hook 'setup-flycheck-project-path)
+#+END_SRC
+
+**** COMMENT Company
 Add header completion as well as Irony, which uses clang for suggestions.
 #+BEGIN_SRC emacs-lisp
   (use-package company-c-headers
@@ -982,23 +1000,23 @@
       (add-hook 'c++-mode-hook 'company-mode)
       (add-hook 'c-mode-hook 'company-mode))
 
-  (use-package irony
-    :ensure t
-    :init
-    (setq w32-pipe-read-delay 0)
-    (setq irony-server-w32-pipe-buffer-size (* 64 1024))
-    (add-hook 'c++-mode-hook 'irony-mode)
-    (add-hook 'c-mode-hook 'irony-mode)
-    (add-hook 'irony-mode-hook 'irony-cdb-autosetup-compile-options)
-    (add-hook 'irony-mode-hook 'irony-cdb-autosetup-compile-options))
+  ;; (use-package irony
+  ;;   :ensure t
+  ;;   :init
+  ;;   (setq w32-pipe-read-delay 0)
+  ;;   (setq irony-server-w32-pipe-buffer-size (* 64 1024))
+  ;;   (add-hook 'c++-mode-hook 'irony-mode)
+  ;;   (add-hook 'c-mode-hook 'irony-mode)
+  ;;   (add-hook 'irony-mode-hook 'irony-cdb-autosetup-compile-options)
+  ;;   (add-hook 'irony-mode-hook 'irony-cdb-autosetup-compile-options))
 
-  (use-package company-irony
-    :ensure t
-    :after irony
-    :config
-    (add-to-list 'company-backends '(company-c-headers
-                                     company-dabbrev-code
-                                     company-irony)))
+  ;; (use-package company-irony
+  ;;   :ensure t
+  ;;   :after irony
+  ;;   :config
+  ;;   (add-to-list 'company-backends '(company-c-headers
+  ;;                                    company-dabbrev-code
+  ;;                                    company-irony)))
 #+END_SRC
 **** Clang-format
 Automatically format buffer on save.
@@ -1229,7 +1247,7 @@
   (use-package flycheck-rust
     :ensure t
     :config
-    (add-hook 'flyckeck-mode-hook #'flycheck-rust-setup))
+    (add-hook 'flycheck-mode-hook #'flycheck-rust-setup))
 #+END_SRC
 *** Go
 **** Major mode

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