You can get the code by doing:
svn co svn+ssh://svn.cern.ch/reps/atlasusr/vdao/TopAnalysisCode_2012/trunk TopAnalysisCode
from inside your
TopRootCore (2012) directory.
To set it up (having already set up
TopRootCore):
export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/project/atlas/users/vdao/Top_2012/AnalysisCode/lib/
cd TopAnalysisCode
scp lib/get_ldflagsVale.sh ../RootCore/scripts/
cd lib/
make
cd ..
Then you have two executables in bin:
./BuildL2Ntuple.exe to create L2 ntuples
./CheckSample.exe to plot some distributions starting from L2 ntuples