Re-marking agenda entries, with advice on org-agenda-bulk-action in .emacs

[netty hacky <netty.hacky@gmail.com>]

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Hello,

The issue of re-marking agenda entries has been raised before:
http://lists.gnu.org/archive/html/emacs-orgmode/2011-02/msg00200.html

I am facing the same problem.  I always do more than one bulk actions on the
same set of agenda entries, so having to re-mark them manually has been a
pain.  The org-agenda-bulk-mark-regexp command sort of helped, but I still
prefer the Dired behavior of retaining the mark after action is performed,
(typing one 'U' is much less keystroke than any manual re-marking).

Anyway, I put the following piece of code in .emacs to give me the Dired
like behavior.  It seems to work for me.  Since I'm new to Emacs Lisp and
this is the 2nd day I'm hacking Org-mode code, could anyone help spot
anything I did stupid here that may shoot me in the foot?  Much appreciated.

(eval-after-load 'org-agenda
  '(defadvice org-agenda-bulk-action (around bulk-re-mark
                                             (&optional arg)
                                             activate)
     "Re-mark entries marked before action."
     (let ((entries (copy-sequence org-agenda-bulk-marked-entries)))
       ad-do-it
       (let (pos (cnt 0) (cntskip 0) (msg (current-message)))
         (dolist (e entries)
           (setq pos (text-property-any (point-min) (point-max)
'org-hd-marker e))
           (if (not pos)
               (setq cntskip (1+ cntskip))
             (goto-char pos)
             (call-interactively 'org-agenda-bulk-mark)
             (setq cnt (1+ cnt))))
         (message "%s (%d entries re-marked, %d skipped)" msg cnt
cntskip)))))

Cheers,
Net
P.S. I would like to express my sincere gratitude to all who helped make
Org-mode such a beautiful piece of software and a life-changing experience.

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