[CMake] Support for multiple components in cpack (reloaded)

[Clinton Stimpson]

On 08/22/2010 10:47 AM, Eric Noulard wrote:
> 2010/8/22 Eric Noulard<eric.noulard at gmail.com>:
>    
>> 2010/8/21 Clinton Stimpson<clinton at elemtech.com>:
>>      
>>> I wondered if one would typically use groups if their project contained sub projects, and the sub projects had different conventions for the component names.
>>>        
>> I do not usually work with sub-project and I must admit I don't even know
>> how CPack behave for project with sub-project(s). I'll try in order to observe
>> the current behavior.
>>      
> Ok now I did some testing regarding CPack and subproject(s).
>  From my testing and my thinking the conclusion is
>
> CPack is not aware **AT ALL** of subprojects :-(
>
> It's even worse, since CPack is not meant to be included more than once
> in the same tree.
> In fact you already know that because you are the reporter of this:
> http://public.kitware.com/Bug/view.php?id=10751
>
> A related discussion on the ML:
> http://www.cmake.org/pipermail/cmake/2010-August/038648.html
>
> So I would say, unless I misunderstood something,
> that **currently** you CAN NOT use "subproject" to do any grouping with CPack.
> If any subproject do include(CPack) while your toplevel project does
> it as well, you'll get unexpected behavior.
> The most probable consequence is that is you call "make package" in the toplevel
> project you'll get a source package instead of a binary package :-)
>
> What you CAN ALREADY do is to use your toplevel project to build a package which
> contains all subprojects. You can even use component in the
> subproject(s) it will
> work as expected.
>
> If we want to be able to include(CPack) several times, many thing
> should be changed
> and we should specify the expected behavior very precisely, I do not
> think it's as easy
> as it may seems. Definitely on my workplan now :-(
>
>    

Yeah, there is that issue, but I'm thinking of something a bit 
different... let me demonstrate with a fictitious example with subprojects:

project A, has sub-projects B, C.
project B has install() commands with components "Development" and 
"Binaries"
project C has install() commands with components "Dev" "Runtime"
And suppose project A has its own naming of components.

now, suppose project A wants to make a component based package, but 
wants B:Development and C:Dev merged together as "Devel," and B:Binaries 
and C:Runtime merged to "Runtime."

Is there anything in cpack to allow for that?  Do we need something like 
that?
I've been getting along fine for a while and I just edit the cmake files 
of my subprojects.
I don't know about others though.

Clint