misc/rubydb3x.el

   1 (require 'gud)
   2 (provide 'rubydb)
   3
   4 ;; ======================================================================
   5 ;; rubydb functions
   6
   7 ;;; History of argument lists passed to rubydb.
   8 (defvar gud-rubydb-history nil)
   9
  10 (if (fboundp 'gud-overload-functions)
  11     (defun gud-rubydb-massage-args (file args)
  12       (cons "-r" (cons "debug" (cons file args))))
  13   (defun gud-rubydb-massage-args (file args)
  14       (cons "-r" (cons "debug" args))))
  15
  16 ;; There's no guarantee that Emacs will hand the filter the entire
  17 ;; marker at once; it could be broken up across several strings.  We
  18 ;; might even receive a big chunk with several markers in it.  If we
  19 ;; receive a chunk of text which looks like it might contain the
  20 ;; beginning of a marker, we save it here between calls to the
  21 ;; filter.
  22 (defvar gud-rubydb-marker-acc "")
  23 (make-variable-buffer-local 'gud-rubydb-marker-acc)
  24
  25 (defun gud-rubydb-marker-filter (string)
  26   (setq gud-rubydb-marker-acc (concat gud-rubydb-marker-acc string))
  27   (let ((output ""))
  28
  29     ;; Process all the complete markers in this chunk.
  30     (while (string-match "\032\032\\([^:\n]*\\):\\([0-9]*\\):.*\n"
  31                          gud-rubydb-marker-acc)
  32       (setq
  33
  34        ;; Extract the frame position from the marker.
  35        gud-last-frame
  36        (cons (substring gud-rubydb-marker-acc (match-beginning 1) (match-end 1))
  37              (string-to-int (substring gud-rubydb-marker-acc
  38                                        (match-beginning 2)
  39                                        (match-end 2))))
  40
  41        ;; Append any text before the marker to the output we're going
  42        ;; to return - we don't include the marker in this text.
  43        output (concat output
  44                       (substring gud-rubydb-marker-acc 0 (match-beginning 0)))
  45
  46        ;; Set the accumulator to the remaining text.
  47        gud-rubydb-marker-acc (substring gud-rubydb-marker-acc (match-end 0))))
  48
  49     ;; Does the remaining text look like it might end with the
  50     ;; beginning of another marker?  If it does, then keep it in
  51     ;; gud-rubydb-marker-acc until we receive the rest of it.  Since we
  52     ;; know the full marker regexp above failed, it's pretty simple to
  53     ;; test for marker starts.
  54     (if (string-match "\032.*\\'" gud-rubydb-marker-acc)
  55         (progn
  56           ;; Everything before the potential marker start can be output.
  57           (setq output (concat output (substring gud-rubydb-marker-acc
  58                                                  0 (match-beginning 0))))
  59
  60           ;; Everything after, we save, to combine with later input.
  61           (setq gud-rubydb-marker-acc
  62                 (substring gud-rubydb-marker-acc (match-beginning 0))))
  63
  64       (setq output (concat output gud-rubydb-marker-acc)
  65             gud-rubydb-marker-acc ""))
  66
  67     output))
  68
  69 (defun gud-rubydb-find-file (f)
  70   (save-excursion
  71     (let ((buf (find-file-noselect f)))
  72       (set-buffer buf)
  73 ;;      (gud-make-debug-menu)
  74       buf)))
  75
  76 (defvar rubydb-command-name "ruby"
  77   "File name for executing ruby.")
  78
  79 ;;;###autoload
  80 (defun rubydb (command-line)
  81   "Run rubydb on program FILE in buffer *gud-FILE*.
  82 The directory containing FILE becomes the initial working directory
  83 and source-file directory for your debugger."
  84   (interactive
  85    (list (read-from-minibuffer "Run rubydb (like this): "
  86                                (if (consp gud-rubydb-history)
  87                                    (car gud-rubydb-history)
  88                                  (concat rubydb-command-name " "))
  89                                nil nil
  90                                '(gud-rubydb-history . 1))))
  91
  92   (if (not (fboundp 'gud-overload-functions))
  93       (gud-common-init command-line 'gud-rubydb-massage-args
  94                        'gud-rubydb-marker-filter 'gud-rubydb-find-file)
  95     (gud-overload-functions '((gud-massage-args . gud-rubydb-massage-args)
  96                               (gud-marker-filter . gud-rubydb-marker-filter)
  97                               (gud-find-file . gud-rubydb-find-file)))
  98     (gud-common-init command-line rubydb-command-name))
  99
 100   (gud-def gud-break  "b %l"         "\C-b" "Set breakpoint at current line.")
 101 ;  (gud-def gud-remove "clear %l"     "\C-d" "Remove breakpoint at current line")
 102   (gud-def gud-step   "s"            "\C-s" "Step one source line with display.")
 103   (gud-def gud-next   "n"            "\C-n" "Step one line (skip functions).")
 104   (gud-def gud-cont   "c"            "\C-r" "Continue with display.")
 105   (gud-def gud-finish "finish"       "\C-f" "Finish executing current function.")
 106   (gud-def gud-up     "up %p"        "<" "Up N stack frames (numeric arg).")
 107   (gud-def gud-down   "down %p"      ">" "Down N stack frames (numeric arg).")
 108   (gud-def gud-print  "p %e"         "\C-p" "Evaluate ruby expression at point.")
 109
 110   (setq comint-prompt-regexp "^(rdb:-) ")
 111   (if (boundp 'comint-last-output-start)
 112       (set-marker comint-last-output-start (point)))
 113   (set (make-local-variable 'paragraph-start) comint-prompt-regexp)
 114   (run-hooks 'rubydb-mode-hook)
 115   )