Re: automatic dired update

[Michael Heerdegen]

`auto-revert-mode' is designed to work for dired, too! Simply call it
from `dired-mode-hook'.

It is quite relyable and does what you want without additional
configuration.

Unfortunately, there are still some problems with this. For example,
actions like `dired-to-copy' cause the buffer-modified flag of the
target buffer to be set, which prevents later auto-reverting. There was
a discussion in gnu.emacs.bug about this; I hope the emacs developers
will find a better solution for Gnu Emacs 23.