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+;; This file adds support for ruby-debug (rdebug) in Emacs.
+;; Copyright (C) 2007 Martin Nordholts <enselic@gmail.com>
+;;
+;; This file is based on 'rubydb3x.el' that comes with Ruby which is
+;; Copyright (C) Yukihiro Matsumoto aka Matz
+;;
+;; Installation:
+;; -------------
+;;
+;; 1. Make sure you have ruby-debug on your system (test by running
+;; the commmand 'rdebug -v' in a shell).
+;;
+;; 2. Copy this file into e.g. ~/.elisp and make sure this is in
+;; your ~/.emacs:
+;;
+;; (add-to-list 'load-path "~/.elisp")
+;; (load-library "rdebug")
+;;
+;; you can then start the debugger with M-x rdebug
+;;
+;; 3. Setup convenient keybindings etc. This is what I have:
+;;
+;; (global-set-key [f9] 'gud-step)
+;; (global-set-key [f10] 'gud-next)
+;; (global-set-key [f11] 'gud-cont)
+;;
+;; (global-set-key "\C-c\C-d" 'rdebug)
+;;
+;; 4. Debug like crazy!
+;;
+;; Bugs:
+;; -----
+;;
+;; Basic functionality works fine, though there might be a bug hiding somewhere.
+
+(require 'gud)
+(provide 'rdebug)
+
+;; ======================================================================
+;; rdebug functions
+
+;;; History of argument lists passed to rdebug.
+(defvar gud-rdebug-history nil)
+
+(if (fboundp 'gud-overload-functions)
+ (defun gud-rdebug-massage-args (file args)
+ (cons file args))
+ (defun gud-rdebug-massage-args (file args)
+ args))
+
+;; There's no guarantee that Emacs will hand the filter the entire
+;; marker at once; it could be broken up across several strings. We
+;; might even receive a big chunk with several markers in it. If we
+;; receive a chunk of text which looks like it might contain the
+;; beginning of a marker, we save it here between calls to the
+;; filter.
+(defvar gud-rdebug-marker-acc "")
+(make-variable-buffer-local 'gud-rdebug-marker-acc)
+
+(defun gud-rdebug-marker-filter (string)
+ (setq gud-rdebug-marker-acc (concat gud-rdebug-marker-acc string))
+ (let ((output ""))
+
+ ;; Process all the complete markers in this chunk.
+ (while (string-match "\\([^:\n]*\\):\\([0-9]+\\):.*\n"
+ gud-rdebug-marker-acc)
+ (setq
+
+ ;; Extract the frame position from the marker.
+ gud-last-frame
+ (cons (substring gud-rdebug-marker-acc (match-beginning 1) (match-end 1))
+ (string-to-int (substring gud-rdebug-marker-acc
+ (match-beginning 2)
+ (match-end 2))))
+
+
+ ;; Append any text before the marker to the output we're going
+ ;; to return - we don't include the marker in this text.
+ output (concat output
+ (substring gud-rdebug-marker-acc 0 (match-beginning 0)))
+
+ ;; Set the accumulator to the remaining text.
+ gud-rdebug-marker-acc (substring gud-rdebug-marker-acc (match-end 0))))
+
+ (setq output (concat output gud-rdebug-marker-acc)
+ gud-rdebug-marker-acc "")
+
+ output))
+
+(defun gud-rdebug-find-file (f)
+ (save-excursion
+ (let ((buf (find-file-noselect f)))
+ (set-buffer buf)
+;; (gud-make-debug-menu)
+ buf)))
+
+(defvar rdebug-command-name "rdebug"
+ "File name for executing rdebug.")
+
+;;;###autoload
+(defun rdebug (command-line)
+ "Run rdebug on program FILE in buffer *gud-FILE*.
+The directory containing FILE becomes the initial working directory
+and source-file directory for your debugger."
+ (interactive
+ (list (read-from-minibuffer "Run rdebug (like this): "
+ (if (consp gud-rdebug-history)
+ (car gud-rdebug-history)
+ (concat rdebug-command-name " "))
+ nil nil
+ '(gud-rdebug-history . 1))))
+
+ (if (not (fboundp 'gud-overload-functions))
+ (gud-common-init command-line 'gud-rdebug-massage-args
+ 'gud-rdebug-marker-filter 'gud-rdebug-find-file)
+ (gud-overload-functions '((gud-massage-args . gud-rdebug-massage-args)
+ (gud-marker-filter . gud-rdebug-marker-filter)
+ (gud-find-file . gud-rdebug-find-file)))
+ (gud-common-init command-line rdebug-command-name))
+
+ (gud-def gud-break "break %d%f:%l" "\C-b" "Set breakpoint at current line in current file.")
+; (gud-def gud-remove "delete %d%f:%l" "\C-d" "Remove breakpoint at current line in current file.")
+ (gud-def gud-step "step" "\C-s" "Step one source line with display.")
+ (gud-def gud-next "next" "\C-n" "Step one line (skip functions).")
+ (gud-def gud-cont "cont" "\C-r" "Continue with display.")
+ (gud-def gud-finish "finish" "\C-f" "Finish executing current function.")
+ (gud-def gud-up "up %p" "<" "Up N stack frames (numeric arg).")
+ (gud-def gud-down "down %p" ">" "Down N stack frames (numeric arg).")
+ (gud-def gud-print "p %e" "\C-p" "Evaluate ruby expression at point.")
+
+ (setq comint-prompt-regexp "^(rdb:-) ")
+ (if (boundp 'comint-last-output-start)
+ (set-marker comint-last-output-start (point)))
+ (set (make-local-variable 'paragraph-start) comint-prompt-regexp)
+ (run-hooks 'rdebug-mode-hook)
+ )