[CMake] Data dir

[Yegor Yefremov]

> I am working on a CPack/NSIS based installer for MariaDB. The early
> parts were really easy to do, but now it becomes more complicated.
> 
> First problem: I have a set of files with the bootstrap MySQL/MariaDB
> database files. Some users might not want to install these, if they are
> installing to a set of database files that are already there.

Have you already looked at this article: 
http://www.cmake.org/Wiki/CMake:Component_Install_With_CPack
 
> Second problem: The un-installer should ask if the user wants to delete
> these files. Currently they are just silently deleted, and I suspect
> that would make some users quite upset :-)
> 
> If anybody has a solution to these two problems, I'd love to hear about
> it. So far I couldn't find anything in this direction.

Regards,
Yegor