Update & refactor tools/debugger

- Polish dap-mode support
- Fix realgud autoloads
- Add +debugger/start and +debugger/quit
- Move dap-breakpoints file into doom-etc-dir
- Fix SPC o d
- Add popup rule for realgud:pdb debugger
- Update display-in-popup advice to reflect changes upstream
- Realgud command buffer is auto-killed (and popup closed) when quitting
  the debugger.
- (evil users) Add :debug ex command

modules/tools/debugger/autoload/debugger.el

@@ -0,0 +1,82 @@
+;;; tools/debugger/autoload/debugger.el -*- lexical-binding: t; -*-
+
+(defvar +debugger--last nil)
+
+(defun +debugger-list-for-dap ()
+  (when (and (bound-and-true-p lsp-mode)
+             (require 'dap-mode nil t)
+             dsp-mode)
+    (mapcar #'car dap--debug-template-configurations)))
+
+(defun +debugger-list-for-realgud ()
+  (cl-loop for (sym . plist) in +debugger-realgud-alist
+           for sym-name = (symbol-name sym)
+           for modes = (plist-get plist :modes)
+           if (or (null modes) (apply #'derived-mode-p modes))
+           collect sym))
+
+
+(defun +debugger-list-available ()
+  "TODO"
+  (append (+debugger-list-for-dap)
+          (+debugger-list-for-realgud)
+          nil))
+
+
+;;
+;;; Interactive commands
+
+;;;###autoload
+(defun +debugger/start-last ()
+  "Relaunch the last debugger session."
+  (interactive)
+  (unless +debugger--last
+    (user-error "No last debugger to invoke"))
+  (call-interactively +debugger--last))
+
+;;;###autoload
+(defun +debugger/start (arg)
+  "Launch a debugger session.
+
+Launches the last used debugger, if one exists. Otherwise, you will be prompted
+for what debugger to use. If the prefix ARG is set, prompt anyway."
+  (interactive "P")
+  (if (or arg (null +debugger--last))
+      (let ((debugger (intern-soft (completing-read "Start debugger: " (+debugger-list-available)))))
+        (unless debugger
+          (user-error "No debugging session to quit"))
+        (unless (fboundp debugger)
+          (user-error "Couldn't find debugger backend %S" debugger))
+        (setq-local +debugger--last debugger)
+        (call-interactively debugger))
+    (+debugger/start-last)))
+
+;;;###autoload
+(defun +debugger/quit ()
+  "Quit the active debugger, if any."
+  (interactive)
+  (cond ((and (fboundp 'dap--cur-session) (dap--cur-session))
+         (dap-disconnect))
+        ((and (fboundp 'realgud-get-cmdbuf) (realgud-get-cmdbuf))
+         (let ((buf (realgud-get-cmdbuf)))
+           (ignore-errors
+             (call-interactively #'realgud:cmd-quit))
+           (let (realgud-safe-mode)
+             (kill-buffer buf))))
+        ((user-error "No debugging session to quit"))))
+
+;; TODO debugger breakpoint commands
+;; ;;;###autoload
+;; (defun +debugger/toggle-breakpoint ()
+;;   (interactive)
+;;   (user-error "not implemented yet"))
+
+;; ;;;###autoload
+;; (defun +debugger/next-breakpoint ()
+;;   (interactive)
+;;   (user-error "not implemented yet"))
+
+;; ;;;###autoload
+;; (defun +debugger/previous-breakpoint ()
+;;   (interactive)
+;;   (user-error "not implemented yet"))