[Rivet] auxiliary scripts in several generators.

[Andy Buckley]

On 09/04/13 14:52, Pere Mato Vila wrote:
> Hi Andy,
> 
>> Hi Pere et al,
>>
>> I notice that ROOT has a root-config script: does that somehow survive
>> Grid/CVMFS relocation? I have to admit that I've only used it locally.
> 
> Yes it does. 
> 
>>
>> In my local, privately made build of ROOT I see lines like
>> bindir=/usr/local/bin
> 
> I do not know which one you are looking. We never install ROOT at the system.  In the installations on AFS (e.g. /afs/cern.ch/sw/lcg/app/releases/ROOT/5.34.04/x86_64-slc5-gcc43-opt/root/bin/root-config ) I see lines like
> 
>    fullpath1=$0
>  ...
>     lpath=`dirname $0`
>     fullpath1=$lpath/$fullpath1
>   ....
> ROOTSYS=`dirname $fullpath1`
> 
> So it gets the installation location relative from the location of root-config

Interesting, that script seems to change in surprising ways based on how
ROOT was installed...

>> in this script, (I installed into prefix=/usr/local) so I suspect that
>> it suffers from the same problem. If so, there are *-config script
>> problems closer to the heart of SFT/LCG than the myriad external
>> generator packages!
> 
>   Strange justification.

Not a justification, and rather tongue-in-cheek. Just an observation
(which anyway seems invalidated by the version you've pointed at) that
there seemed to be other problematic config scripts around.

>> But if there's a clever trick in the there that
>> makes it "just work", then I'd be happy to try to put it into the
>> packages that I have control over.
>>
> 
> Thanks. Another example code  can be found at http://svnweb.cern.ch/world/wsvn/clhep/trunk/clhep-config.in

I'll look into whether it would be reasonable to do a similar `dirname
$0` approach with Rivet etc. It can't *exactly* work because of the
possibility to install data, execs, and libs into different trees... but
the simplest case of a homogeneous installation might be possible. Might
need some trickery to fix the centrally generated -L, -I flag arguments,
though, especially when they point at somewhere on AFS that doesn't
trivially translate into a Grid/CVMFS location... we'll see.

Cheers,
Andy

-- 
Dr Andy Buckley, Royal Society University Research Fellow
Particle Physics Expt Group, University of Edinburgh

The University of Edinburgh is a charitable body, registered in
Scotland, with registration number SC005336.