my lsp / clang configuration

gistfile1.txt

;;; Package: lsp-mode - language server protocol

(use-package lsp-mode
  :straight t
  :diminish lsp-mode  ;; I can see if it is active in the menu!
  :commands (lsp lsp-deferred)
  :hook ((c-mode . lsp-deferred)
         (c++-mode . lsp-deferred))
  :bind (:map lsp-mode-map
              ("C-c o" . lsp-describe-thing-at-point)
              ("C-c f" . lsp-format-region)
              ("C-c a" . lsp-execute-code-action)
              ("C-c h" . lsp-document-highlight)
              ("C-c n" . lsp-rename)
              ;; ("M-." . lsp-find-definition)
              )
  :init
  ;; (add-hook 'hack-local-variables-hook
  ;;           (lambda () (when (derived-mode-p 'c++-mode) (lsp-deferred))))

  :config
  (require 'yasnippet)
  (setq lsp-auto-guess-root t)      ; Detect project root
  ;;(setq lsp-enable-snippet nil)   ; no yasnipped for now
  (setq lsp-prefer-flymake nil)     ; Use lsp-ui if present
  (setq lsp-eldoc-render-all nil)   ; this is now rendered via lsp-ui
  (setq lsp-enable-symbol-highlighting nil) ; don't highlight the current symbol

  (setq lsp-document-sync-method 'incremental)

  (setq lsp-keep-workspace-alive nil)
  (setq lsp-session-file (locate-user-emacs-file "tmp/lsp-session-v1"))

  ;; face for "hightlight referenced"
  (set-face-attribute 'lsp-face-highlight-textual nil
                      :background "#666" :foreground "#ffffff")
  (set-face-attribute 'lsp-face-highlight-read nil
                      :background "#666" :foreground "#ffffff" :underline nil)
  (set-face-attribute 'lsp-face-highlight-write nil
                      :background "#666" :foreground "#ffffff")

  ;; fixup the menu
  (define-key lsp-mode-menu [menu-bar lsp] nil)
  (easy-menu-remove-item lsp-mode-menu nil "Add folder to workspace")
  (easy-menu-remove-item lsp-mode-menu nil "Remove folder from workspace")
  (easy-menu-remove-item lsp-mode-menu nil "Switch to another workspace folder")
   ;; not supported by clangd
  (easy-menu-remove-item lsp-mode-menu nil "Find implementations of symbol under point")
  (easy-menu-remove-item lsp-mode-menu nil "Find type definitions of symbol under point")
  ;; no need to display this menu entry when the function is disabled
  (unless lsp-log-io
    (easy-menu-remove-item lsp-mode-menu nil "View IO logs for workspace")))


;;; Package: lsp-clients - use clangd

(use-package lsp-clients
  :defer t
  :defines (lsp-clients-clangd-args)

  :init
  ;; prevent this from being loaded :-)
  (provide 'lsp-pyls)
  (provide 'lsp-rust)
  (provide 'lsp-solargraph)
  (provide 'lsp-vetur)
  (provide 'lsp-intelephense)
  (provide 'lsp-css)
  (provide 'lsp-xml)
  (provide 'lsp-go)
  (provide 'lsp-clojure)
  (provide 'lsp-dart)
  (provide 'lsp-elm)
  (provide 'lsp-metals)
  (provide 'lsp-fsharp)
  (provide 'lsp-erlang)


  :config
  (setq lsp-clients-clangd-executable "/usr/bin/clangd-10")
  ;; maybe set this from .dir-locals?
  (setq lsp-clients-clangd-args `("-j=2"
                                  "--background-index"
                                  "--clang-tidy"
                                  "--completion-style=bundled"
                                  "--header-insertion=iwyu"
                                  "--suggest-missing-includes"
                                  "--log=error"
                                  ,(concat "--compile-commands-dir=" (file-truename (locate-dominating-file "." ".git")) "build")
                                  )))


;;; Package: lsp-ui - show error and documentation in a nice way

(use-package lsp-ui
  :straight t
  :commands lsp-ui-mode
  :bind (:map lsp-ui-mode-map
              ([remap xref-find-definitions] . lsp-ui-peek-find-definitions)
              ([remap xref-find-references]  . lsp-ui-peek-find-references)
              ("M-g i" . lsp-ui-imenu)
              )
  :config

  (setq lsp-ui-doc-enable nil)
  (setq lsp-ui-doc-delay 0.5)
  (setq lsp-ui-doc-include-signature t)
  ;; (setq lsp-ui-doc-border (face-foreground 'default))
  ;; (setq lsp-eldoc-enable-hover t)

  (setq lsp-ui-sideline-ignore-duplicate t)
  ;; (setq lsp-ui-sideline-show-hover nil)
  ;; (setq lsp-ui-sideline-show-diagnostics t)

  ;; (add-to-list 'lsp-ui-doc-frame-parameters '(right-fringe . 8))

  (easy-menu-define-key lsp-mode-menu "M-." (cons "Find definition" #'lsp-ui-peek-find-definitions)
                        "Find definitions of symbol")

  (easy-menu-define-key lsp-mode-menu "M-?" (cons "Find references" #'lsp-ui-peek-find-references)
                        "Find definitions of symbol")

  (easy-menu-remove-item lsp-mode-menu nil "Find definitions of symbol")
  ;; these two aren't supported by clangd
  (easy-menu-remove-item lsp-mode-menu nil "Find implementations of symbol under point")
  (easy-menu-remove-item lsp-mode-menu nil "Find references to symbol under point"))