#!/bin/bash

cd  $SIMPATH/transport/

# Full output during compilation and linking to check for the
# compile and link commands
#export CPPVERBOSE=1


if (not_there Geant4-Source $SIMPATH/transport/geant4/source/CMakeLists.txt);
then
  untar geant4 $GEANT4VERSION.tar.gz 
  ln -s $GEANT4VERSION geant4  
fi

G4WORKDIR=$SIMPATH/transport/geant4/

if [ "$make_install" = "yes" ]; 
then
  install_prefix=$SIMPATH_INSTALL
  clhep_exe=$SIMPATH_INSTALL/bin/clhep-config
else
  install_prefix=$G4WORKDIR
  clhep_exe=$SIMPATH/cern/clhep/bin/clhep-config
fi
checkfile=$install_prefix/lib/libG4physicslists.so

if (not_there Geant4-lib $checkfile);
then

  cd $G4WORKDIR

  if (not_there Geant4-build  $G4WORKDIR/build);
  then 
    mkdir build
  fi 
  cd build
  
  if [ "$geant4_download_install_data_automatic" = "yes" ];
  then
    install_data="-DGEANT4_INSTALL_DATA=ON"
  else
    install_data=""
  fi
  cmake -DCMAKE_INSTALL_PREFIX=$install_prefix -DCMAKE_INSTALL_LIBDIR=$install_prefix/lib \
        -DGEANT4_USE_G3TOG4=ON -DGEANT4_BUILD_STORE_TRAJECTORY=OFF \
        -DGEANT4_BUILD_VERBOSE_CODE=OFF  $install_data  ../
  $MAKE_command -j$number_of_processes  install 

  # copy the env.sh script to the bin directorry
  mkdir -p $install_prefix/bin
 # cp $G4WORKDIR/env.sh $install_prefix/bin
  
  if [ "$platform" = "macosx" ];
  then
    cd $install_prefix/lib
    create_links dylib so
  fi

  if [ "$geant4_download_install_data_automatic" = "yes" ];
  then
    # create unique links which is independent of the Geant4 version  
    if [ ! -L $install_prefix/share/Geant4 ]; then
      ln -s $install_prefix/share/$GEANT4VERSIONp $install_prefix/share/Geant4
    fi
  fi
              
  . $install_prefix/share/$GEANT4VERSIONp/geant4make/geant4make.sh
  
else
   
  . $install_prefix/share/$GEANT4VERSIONp/geant4make/geant4make.sh

fi
  
cd  $SIMPATH
return 1