#!/bin/sh
set -x

# ParaView 3.x build script
# - run from folder above source folder
PARAVIEW_SRC="ParaView3.2.1"

VERBOSE="OFF"
INCLUDE_MPI="ON"
MPI_MAX_PROCS=32
INCLUDE_PYTHON="ON"
INCLUDE_MESA="OFF"

# initialisation
CMAKE_VARIABLES=""
PWD=`pwd`
OBJ_ADD=""

# set general options
CMAKE_VARIABLES="$CMAKE_VARIABLES -DBUILD_SHARED_LIBS:BOOL=ON"

if [ "$VERBOSE" = "ON" ]; then
    CMAKE_VARIABLES="$CMAKE_VARIABLES -DCMAKE_VERBOSE_MAKEFILE=TRUE"
fi

# set MPI specific options
if [ "$INCLUDE_MPI" = "ON" ]; then
    OBJ_ADD="$OBJ_ADD-mpi"

    if [ "$WM_MPLIB" = "OPENMPI" ]; then
        MPI_INCLUDE_PATH=$OPENMPI_ARCH_PATH/include
        MPI_LIBRARY=$OPENMPI_ARCH_PATH/lib/libmpi.so
        MPI_RUN=$OPENMPI_ARCH_PATH/bin/mpirun
    elif [ "$WM_MPLIB" = "LAM" ]; then
        MPI_INCLUDE_PATH=$LAM_ARCH_PATH/include
        MPI_LIBRARY=$LAM_ARCH_PATH/lib/libmpi.so
        MPI_RUN=$LAM_ARCH_PATH/bin/mpirun
    elif [ "$WM_MPLIB" = "MPICH" ]; then
        MPI_INCLUDE_PATH=$MPICH_ARCH_PATH/include
        MPI_LIBRARY=$MPICH_ARCH_PATH/lib/libmpich.so
        MPI_RUN=$MPICH_ARCH_PATH/bin/mpirun
    fi

    CMAKE_VARIABLES="$CMAKE_VARIABLES -DVTK_USE_MPI=ON"
    CMAKE_VARIABLES="$CMAKE_VARIABLES -DPARAVIEW_USE_MPI=ON"
    CMAKE_VARIABLES="$CMAKE_VARIABLES -DMPI_INCLUDE_PATH=$MPI_INCLUDE_PATH"
    CMAKE_VARIABLES="$CMAKE_VARIABLES -DMPI_LIBRARY=$MPI_LIBRARY"
    CMAKE_VARIABLES="$CMAKE_VARIABLES -DVTK_MPIRUN_EXE=$MPI_RUN"
    CMAKE_VARIABLES="$CMAKE_VARIABLES -DVTK_MPI_MAX_NUMPROCS=$MPI_MAX_PROCS"
fi

# set python specific options
if [ "$INCLUDE_PYTHON" = "ON" ]; then
    WHICH_PYTHON=`which python`
    if [ "$WHICH_PYTHON" != "" ]; then
        OBJ_ADD="$OBJ_ADD-py"

        PYTHON_LIBRARY=`ldd $WHICH_PYTHON | grep libpython | \
            sed 's/.* => \(.*\) (.*/\1/'`
        PYTHON_MAJOR_VERSION=`echo $PYTHON_LIBRARY | \
            sed 's/.*libpython\(.*\).so.*/\1/'`
        PYTHON_INCLUDE_DIR=/usr/include/python$PYTHON_MAJOR_VERSION

        CMAKE_VARIABLES="$CMAKE_VARIABLES -DPARAVIEW_ENABLE_PYTHON=ON"
        CMAKE_VARIABLES= \
            "$CMAKE_VARIABLES -DPYTHON_INCLUDE_PATH=$PYTHON_INCLUDE_DIR"
        CMAKE_VARIABLES="$CMAKE_VARIABLES -DPYTHON_LIBRARY=$PYTHON_LIBRARY"
    else
        echo "*** Warning: Unable to determine python libray"
        echo "***          De-activating python support"
        INCLUDE_PYTHON="OFF"
    fi
fi

# set MESA specific options
if [ "$INCLUDE_MESA" = "ON" ]; then
    OBJ_ADD="$OBJ_ADD-mesa"

    MESA_INCLUDE_DIR=/usr/include/GL
    MESA_LIBRARY=/usr/lib$WM_COMPILER_LIB_ARCH/libOSMesa.so

    CMAKE_VARIABLES="$CMAKE_VARIABLES -DVTK_OPENGL_HAS_OSMESA=ON"
    CMAKE_VARIABLES="$CMAKE_VARIABLES -DOSMESA_INCLUDE_DIR=$MESA_INCLUDE_DIR"
    CMAKE_VARIABLES="$CMAKE_VARIABLES -DOSMESA_LIBRARY=$MESA_LIBRARY"
fi

# set paraview environment
PARAVIEW_SRC_DIR=$PWD/$PARAVIEW_SRC
#PARAVIEW_OBJ_DIR=$PARAVIEW_SRC_DIR/platforms/$WM_OPTIONS/obj$OBJ_ADD
PARAVIEW_OBJ_DIR=$PARAVIEW_SRC_DIR/platforms/$WM_OPTIONS

# remove existing build folder if present
if [ -e "$PARAVIEW_OBJ_DIR" ]; then
    rm -rf $PARAVIEW_OBJ_DIR
fi

# create paraview build folder
mkdir -p $PARAVIEW_OBJ_DIR
cd $PARAVIEW_OBJ_DIR

echo "Building $PARAVIEW_SRC"
echo "    MPI support    : $INCLUDE_MPI"
echo "    Python support : $INCLUDE_PYTHON"
echo "    MESA support   : $INCLUDE_MESA"
echo "    Source         : $PARAVIEW_SRC_DIR"
echo "    Target         : $PARAVIEW_OBJ_DIR"

# make paraview
cmake \
    -DCMAKE_INSTALL_PREFIX=$PARAVIEW_APP_DIR \
    $CMAKE_VARIABLES \
    $PARAVIEW_SRC_DIR

if [ -r /proc/cpuinfo ]; then
    WM_NCOMPPROCS=`egrep "^processor" /proc/cpuinfo | wc -l`

    if [ $WM_NCOMPPROCS -gt 8 ]; then
        WM_NCOMPPROCS=8
    fi

    make -j $WM_NCOMPPROCS
else
    make
fi

if [ -e "$PARAVIEW_OBJ_DIR/bin/paraview" ]; then
    echo "    Build complete"

    # replace local links with ParaView_INST_DIR environment variables
    echo "    Replacing path hard links"
    find . -iname \*.cmake -execdir sed -i \
        "s,$PARAVIEW_SRC_DIR,\$ENV{ParaView_INST_DIR},g" {} ';' \
        -print

    # create a softlink to the $PARAVIEW_OBJ_DIR/bin folder
    echo "    Creating paraview 3.2 soft link to /bin"
    ( mkdir lib && cd lib && ln -s ../bin paraview-3.2 )

    # info on symlinks to screen
    echo ""
    echo "    ---"
    echo "    Installation complete"
    echo "    Set environment variables:"
    echo "    - ParaView_INST_DIR to $PARAVIEW_SRC_DIR"
    echo "    - ParaView_DIR to $PARAVIEW_OBJ_DIR"
    echo "    - PV_PLUGIN_PATH to $FOAM_LIBBIN"
    echo "    Add $PARAVIEW_OBJ_DIR/bin to PATH"
    #echo "   Add $ParaView_INST_DIR/lib to LD_LIBRARY_PATH"
    echo "    ---"
    echo "done."
fi

# finalisation
cd $PWD