feature request: copy-file option to match cp -u

[Sam Steingold]

Hi,
it would be nice if one could tell copy-file to actually copy only newer
files, i.e., something like this:

(and (file-newer-than-file-p
      from (if (file-directory-p to)
               (expand-file-name (file-name-base from) to)
               to))
     (copy-file from to t))

I think it could be controlled by the 4th argument KEEP-TIME (it appears
that people who want to preserve time would probably want to avoid
copying older files over newer ones) or by a new argument.

Thanks.

-- 
Sam Steingold (http://sds.podval.org/) on CentOS release 5.6 (Final) X 
11.0.60900031
http://pmw.org.il http://mideasttruth.com http://palestinefacts.org
http://camera.org http://memri.org http://honestreporting.com
Hard work has a future payoff.  Laziness pays off NOW.