add lsp-mode, dap-mode and related packages

emacs.d/.gitignore

@@ -8,6 +8,8 @@
 /eln-cache
 /eshell
 /transient
+/.dap-breakpoints
+/.lsp-session*
 
 /backup
 /custom.el

emacs.d/commands.el

@@ -1,5 +1,6 @@
 (defun gered/setup-for-sshfs ()
   (interactive)
   (gered/disable-vcs)
+  (gered/disable-lsp)
   (setq after-focus-change-function (lambda ()))
   (message "Finished setup for SSHFS use"))

emacs.d/dev.el

@@ -72,3 +72,43 @@
   (setq gdb-debuginfod-enable-setting nil)
   (gud-tooltip-mode t))
 
+(defun gered/enable-lsp ()
+  (interactive)
+  (add-hook 'prog-mode-hook 'lsp)
+  (message "Adding lsp hook to prog-modes"))
+
+(defun gered/disable-lsp ()
+  (interactive)
+  (remove-hook 'prog-mode-hook 'lsp)
+  (message "Removing lsp hook from prog-modes"))
+
+(use-package lsp-mode
+  :ensure t
+  :init
+  (setq lsp-keymap-prefix "M-z")
+  :hook
+  ((prog-mode . lsp)
+   (lsp-mode . lsp-enable-which-key-integration))
+  :config
+  (setq lsp-enable-on-type-formatting nil)
+  (setq lsp-headerline-breadcrumb-enable nil)
+  (setq lsp-enable-snippet nil)
+  ;; seems to remove the semi-annoying "Unable to autoconfigure company-mode" warning
+  ;; but still leaves completion via corfu working?
+  (setq lsp-completion-provider :none)
+  :commands lsp)
+
+(use-package lsp-ui
+  :ensure t
+  :commands lsp-ui)
+
+(use-package lsp-treemacs
+  :ensure t
+  :after lsp-mode
+  :commands lsp-treemacs-errors-list)
+
+(use-package dap-mode
+  :ensure t
+  :commands dap-mode
+  :config
+  (use-package dap-gdb))