Move only modified files

[Jo...@Regions.com]

This seems like a basic question, but I haven't been able to find it in 
the user list search...

When we do a build, we want to only include files that have changed when 
compared to a target.  The reason for doing this is keeping the size of 
the buildfile manageable, reduce time when doing a deployment in a 
production environment, and reduce the number of times we have reboot our 
app server.

An example:
ANT compares the source files versus target files, and the changed files 
are copied to a staging directory.


Thanks-
John