There is a feature in xtla.el to send/review patches via gnus.

To set it up, you need the following lines for your .emacs:

(tla-insinuate-gnus)
(setq tla-apply-patch-mapping
      '(((nil "planner" nil  nil nil) "~/work/planner-dev/")))

Replace ~/work/planner-dev/ with your planner working directory

The patches are sent as .tar.gz files.

When you receive such a patch (I will send one soon), You can hit
K t v to view the patch
K t a to apply the patch

I can even provide a log message in the mail.
You can insert the log message via C-c C-p in the tla-log-edit buffer.

E-Mail from Stefan Reichör