Switch from irony to lsp-mode.

Remove irony, cmake-ide, ggtags. Add lsp-mode, lsp-mode-ui and company-lsp.

init.el

@@ -1,5 +1,5 @@
 ;;; init.el --- tastytea's Emacs init file.
-;; Time-stamp: <2019-09-30T16:38:17+00:00>
+;; Time-stamp: <2019-10-08T13:44:40+00:00>
 
 ;;; Commentary:
 ;; Requires at least Emacs 24.3.
@@ -232,22 +232,29 @@ With argument, do this that many times."
 
   (use-package flycheck-clang-tidy
     :pin melpa
-    :after (flycheck projectile)
+    :after (flycheck projectile lsp-ui)
     :if (executable-find "clang-tidy")
     :config
     (defun my/clang-tidy-off ()
-      "Disable c++-clang-tidy."
+      "Disable c/c++-clang-tidy."
       (when (or (eq major-mode 'c++-mode) (eq major-mode 'c-mode))
         (add-to-list 'flycheck-disabled-checkers 'c/c++-clang-tidy))
       )
     (defun my/clang-tidy-on ()
-      "Enable c++-clang-tidy."
+      "Enable c/c++-clang-tidy."
       (when (or (eq major-mode 'c++-mode) (eq major-mode 'c-mode))
         (setq-local flycheck-disabled-checkers
                     (remove 'c/c++-clang-tidy flycheck-disabled-checkers)))
       )
+
+    (defun my/flycheck-clang-tidy-setup ()
+      (flycheck-clang-tidy-setup)
+      ;; Run clang-tidy after the lsp-ui checker.
+      (when lsp-mode
+        (flycheck-add-next-checker 'lsp-ui '(warning . c/c++-clang-tidy)))
+      )
     :hook
-    (flycheck-mode . flycheck-clang-tidy-setup)
+    (flycheck-mode . my/flycheck-clang-tidy-setup)
     (first-change . my/clang-tidy-off)  ; Disable when file is modified.
     (before-save . my/clang-tidy-on)    ; Enable if file is saved.
     )
@@ -325,15 +332,6 @@ With argument, do this that many times."
     ;; Mark variable as safe. This prevents prompts when using .dir-locals.el.
     (put 'projectile-project-compilation-cmd 'safe-local-variable #'stringp)
     (put 'projectile-project-configure-cmd 'safe-local-variable #'stringp)
-
-    ;; Always run `cmake-ide-run-cmake` after configuring a project.
-    (defun my/configure-project (old-function &rest arguments)
-      "Runs `projectile-configure-project' followed by `cmake-ide-run-cmake'."
-      (apply old-function arguments)
-      ;; (cmake-ide-run-cmake)
-      (cmake-ide-load-db)
-      )
-    (advice-add 'projectile-configure-project :around #'my/configure-project)
     :bind
     ("C-c p" . 'projectile-command-map)
     ))
@@ -404,7 +402,7 @@ With argument, do this that many times."
   (dumb-jump-selector 'ivy)
   :bind
   ("M-." . dumb-jump-go)
-  ("M-," . dumb-jump-back))
+  )
 
 ;; Support .editorconfig files.
 (use-package editorconfig
@@ -457,52 +455,33 @@ With argument, do this that many times."
   (c-default-style "tastytea"))
 
 (unless slow-computer
-  ;; irony communicates with a clang-server. It needs compile_commands.json.
-  (use-package irony
-    :pin melpa                          ; 1.3.1 Server does not compile.
-    :after yasnippet
-    :hook
-    (c++-mode        . irony-mode)
-    (c-mode          . irony-mode)
-    (irony-mode      . irony-cdb-autosetup-compile-options)
-    :config
-    ;; If irony server is not installed, install it.
-    (unless (irony--find-server-executable)
-      (call-interactively #'irony-install-server)))
-
-  ;; Eldoc shows argument list of the function you are currently writing.
-  (use-package irony-eldoc
-    :after (eldoc irony)
-    :hook
-    (irony-mode . irony-eldoc))
-
-  ;; Syntax checker.
-  (use-package flycheck-irony
-    :after (flycheck irony)
-    :hook
-    (flycheck-mode-hook . flycheck-irony-setup))
-
-  ;; Auto-complete integration.
-  (use-package company-irony
-    :after (company irony)
-    ;; Backend is added in company-irony-c-headers.
-    )
-
-  ;; Auto-complete headers
-  (use-package company-irony-c-headers
-    :after company-irony
-    :config
-    (add-to-list 'company-backends '(company-irony-c-headers company-irony))
-    )
-
-  ;; cmake integration.
-  (use-package cmake-ide
-    :after irony
+  ;; Client for Language Server Protocol servers.
+  (use-package lsp-mode
     :custom
-    (cmake-ide-build-dir "build")
-    (cmake-ide-cmake-opts "")           ; Use the already configured options.
+    (lsp-prefer-flymake nil)            ; Disable flymake.
+    :hook
+    (c++-mode . lsp)
+    (c-mode . lsp)
+    )
+
+  ;; Eye-candy and flycheck support for lsp-mode.
+  (use-package lsp-ui
+    :after (lsp-mode flycheck)
+    :custom
+    (lsp-ui-sideline-enable nil)
+    :bind
+    (:map lsp-ui-mode-map
+          ("M-." . lsp-ui-peek-find-definitions))
+    :hook
+    (lsp-mode . lsp-ui-mode)
+    )
+
+  ;; Completions with lsp-mode.
+  (use-package company-lsp
+    :after (lsp-mode company)
     :config
-    (cmake-ide-setup))
+    (push 'company-lsp company-backends)
+    )
   ) ; unless slow-computer
 
 
@@ -551,20 +530,6 @@ With argument, do this that many times."
   (c++-mode . modern-c++-font-lock-mode)
   )
 
-;; Jump to definition. Overwrites dumb-jump keybindings.
-(use-package ggtags
-  :if (executable-find "gtags")
-  :bind
-  (:map ggtags-mode-map
-        ("C-M-." . ggtags-navigation-next-mark)
-        ("C-M-," . ggtags-navigation-previous-mark)
-        ("C-M-:" . ggtags-navigation-next-file)
-        ("C-M-;" . ggtags-navigation-previous-file)
-        )
-  :hook
-  (c++-mode . ggtags-mode)
-  )
-
 ;; Add #include directives for missing symbols.
 (use-package clang-include-fixer
   :ensure nil                           ; Installed by clang.
@@ -851,6 +816,9 @@ With argument, do this that many times."
     (if my/ws-enabled
         (whitespace-mode t)))
 
+  (defun my/whitespace-mode-off ()
+    (whitespace-mode -1))
+
   (if (display-graphic-p)
       (custom-set-faces
        '(whitespace-line ((t (:inherit whitespace-line
@@ -878,6 +846,7 @@ With argument, do this that many times."
   (prog-mode . my/ws-load-local-vars-first)
   (conf-mode . my/ws-load-local-vars-first)
   (text-mode . my/ws-load-local-vars-first)
+  (lsp-ui-peek-mode . my/whitespace-mode-off) ; Dots in wrong color.
   :custom-face
   (whitespace-space ((nil :foreground "gray18")))
   )

server/server

@@ -1,2 +1,2 @@
-127.0.0.1:51313 23841
+127.0.0.1:51313 32519
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