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+(require 'gud)
+(provide 'rubydb)
+
+;; ======================================================================
+;; rubydb functions
+
+;;; History of argument lists passed to rubydb.
+(defvar gud-rubydb-history nil)
+
+(defun gud-rubydb-massage-args (file args)
+ (cons "-r" (cons "debug" 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-rubydb-marker-acc "")
+
+(defun gud-rubydb-marker-filter (string)
+ (setq gud-marker-acc (concat gud-marker-acc string))
+ (let ((output ""))
+
+ ;; Process all the complete markers in this chunk.
+ (while (string-match "\032\032\\([^:\n]*\\):\\([0-9]*\\):.*\n"
+ gud-marker-acc)
+ (setq
+
+ ;; Extract the frame position from the marker.
+ gud-last-frame
+ (cons (substring gud-marker-acc (match-beginning 1) (match-end 1))
+ (string-to-int (substring gud-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-marker-acc 0 (match-beginning 0)))
+
+ ;; Set the accumulator to the remaining text.
+ gud-marker-acc (substring gud-marker-acc (match-end 0))))
+
+ ;; Does the remaining text look like it might end with the
+ ;; beginning of another marker? If it does, then keep it in
+ ;; gud-marker-acc until we receive the rest of it. Since we
+ ;; know the full marker regexp above failed, it's pretty simple to
+ ;; test for marker starts.
+ (if (string-match "\032.*\\'" gud-marker-acc)
+ (progn
+ ;; Everything before the potential marker start can be output.
+ (setq output (concat output (substring gud-marker-acc
+ 0 (match-beginning 0))))
+
+ ;; Everything after, we save, to combine with later input.
+ (setq gud-marker-acc
+ (substring gud-marker-acc (match-beginning 0))))
+
+ (setq output (concat output gud-marker-acc)
+ gud-marker-acc ""))
+
+ output))
+
+(defun gud-rubydb-find-file (f)
+ (save-excursion
+ (let ((buf (find-file-noselect f)))
+ (set-buffer buf)
+ (gud-make-debug-menu)
+ buf)))
+
+(defvar rubydb-command-name "ruby"
+ "File name for executing ruby.")
+
+;;;###autoload
+(defun rubydb (command-line)
+ "Run rubydb 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 rubydb (like this): "
+ (if (consp gud-rubydb-history)
+ (car gud-rubydb-history)
+ (concat rubydb-command-name " "))
+ nil nil
+ '(gud-rubydb-history . 1))))
+
+ (gud-common-init command-line 'gud-rubydb-massage-args
+ 'gud-rubydb-marker-filter 'gud-rubydb-find-file)
+
+ (gud-def gud-break "b %l" "\C-b" "Set breakpoint at current line.")
+; (gud-def gud-remove "clear %l" "\C-d" "Remove breakpoint at current line")
+ (gud-def gud-step "s" "\C-s" "Step one source line with display.")
+ (gud-def gud-next "n" "\C-n" "Step one line (skip functions).")
+ (gud-def gud-cont "c" "\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:-) ")
+ (setq paragraph-start comint-prompt-regexp)
+ (run-hooks 'rubydb-mode-hook)
+ )