Zip-Archive mode doesn't check if the archive has changed

Zip-Archive mode doesn't check if the archive has changed

[Dan Jacobson]

Zip-Archive mode doesn't check if the archive has changed on disk if
there still is a buffer of one of its members when bringing back that
buffer.
$ echo Q>m
$ zip a m
  adding: m (stored 0%)
$ emacs .
RET RET C-x b RET C-z
$ echo X>m
$ zip -o a m
updating: m (stored 0%)
$ fg
RET
we see a Q not an X

Re: Zip-Archive mode doesn't check if the archive has changed

[Kevin Rodgers]

Dan Jacobson wrote:

> Zip-Archive mode doesn't check if the archive has changed on disk if
> there still is a buffer of one of its members when bringing back that
> buffer.
> $ echo Q>m
> $ zip a m
>   adding: m (stored 0%)
> $ emacs .
> RET RET C-x b RET C-z
> $ echo X>m
> $ zip -o a m
> updating: m (stored 0%)
> $ fg
> RET
> we see a Q not an X

Zip-Archive mode has nothing to do with it.  If you edit the original,
unzipped file in Fundamental mode the same thing happens.  This is
because Emacs only checks whether the file has been changed on disk whem
you attempt to change the buffer, since there is the chance that you'll
lose the information on disk.

If you want Emacs to continually check the buffer for you, try M-x autorevert.


-- 
Kevin Rodgers

Re: Zip-Archive mode doesn't check if the archive has changed

[Richard Stallman]

    If you want Emacs to continually check the buffer for you, try M-x autorevert.

Would it be desirable to make arc-mode check for reversion
more often, or always turn on auto-revert-mode?