#! /bin/bash

################################################################################
# Prepare
################################################################################

# Set up shell
if [ "$(echo ${VERBOSE} | tr '[:upper:]' '[:lower:]')" = 'yes' ]; then
    set -x                      # Output commands
fi
set -e                          # Abort on errors

################################################################################
# Search
################################################################################

if [ -z "${BOOST_DIR}" ]; then
    echo "BEGIN MESSAGE"
    echo "Boost selected, but BOOST_DIR not set. Checking some places..."
    echo "END MESSAGE"

    FILES="include/boost/array.hpp include/boost/preprocessor/repetition/repeat.hpp include/boost/math/special_functions/gamma.hpp"
    DIRS="/usr /usr/local /usr/local/boost /usr/local/packages/boost /usr/local/apps/boost ${HOME} c:/packages/boost"
    for dir in $DIRS; do
        BOOST_DIR="$dir"
        for file in $FILES; do
            if [ ! -r "$dir/$file" ]; then
                unset BOOST_DIR
                break
            fi
        done
        if [ -n "$BOOST_DIR" ]; then
            break
        fi
    done

    if [ -z "$BOOST_DIR" ]; then
        echo "BEGIN MESSAGE"
        echo "Boost not found"
        echo "END MESSAGE"
    else
        echo "BEGIN MESSAGE"
        echo "Found Boost in ${BOOST_DIR}"
        echo "END MESSAGE"
    fi
fi



################################################################################
# Build
################################################################################

if [ -z "${BOOST_DIR}"                                                  \
     -o "$(echo "${BOOST_DIR}" | tr '[a-z]' '[A-Z]')" = 'BUILD' ]
then
    echo "BEGIN MESSAGE"
    echo "Building Boost..."
    echo "END MESSAGE"

    # Set locations
    THORN=Boost
    #NAME=boost_1_54_0
    NAME=boost_1_55_0
    SRCDIR=$(dirname $0)
    BUILD_DIR=${SCRATCH_BUILD}/build/${THORN}
    if [ -z "${BOOST_INSTALL_DIR}" ]; then
        INSTALL_DIR=${SCRATCH_BUILD}/external/${THORN}
    else
        echo "BEGIN MESSAGE"
        echo "Installing Boost into ${BOOST_INSTALL_DIR}"
        echo "END MESSAGE"
        INSTALL_DIR=${BOOST_INSTALL_DIR}
    fi
    DONE_FILE=${SCRATCH_BUILD}/done/${THORN}
    BOOST_DIR=${INSTALL_DIR}
    
    if [ -e ${DONE_FILE} -a ${DONE_FILE} -nt ${SRCDIR}/dist/${NAME}.tar.gz \
                         -a ${DONE_FILE} -nt ${SRCDIR}/configure.sh ]
    then
        echo "BEGIN MESSAGE"
        echo "Boost has already been built; doing nothing"
        echo "END MESSAGE"
    else
        echo "BEGIN MESSAGE"
        echo "Building Boost"
        echo "END MESSAGE"
        
        # Build in a subshell
        (
        exec >&2                # Redirect stdout to stderr
        if [ "$(echo ${VERBOSE} | tr '[:upper:]' '[:lower:]')" = 'yes' ]; then
            set -x              # Output commands
        fi
        set -e                  # Abort on errors
        cd ${SCRATCH_BUILD}
        
        # Set up environment
        unset LIBS
        if echo '' ${ARFLAGS} | grep 64 > /dev/null 2>&1; then
            export OBJECT_MODE=64
        fi

        echo "Boost: Preparing directory structure..."
        mkdir build external done 2> /dev/null || true
        rm -rf ${BUILD_DIR} ${INSTALL_DIR}
        mkdir ${BUILD_DIR} ${INSTALL_DIR}

        echo "Boost: Unpacking archive..."
        pushd ${BUILD_DIR}
        ${TAR?} xzf ${SRCDIR}/dist/${NAME}.tar.gz

        echo "Boost: Configuring..."
        cd ${NAME}
        # Could also build with MPI instead
        #./bootstrap.sh --prefix=${BOOST_DIR} --without-mpi
        # Could also make MPI dependency optional
        echo 'using mpi ;' > user-config.jam
        ./bootstrap.sh --prefix=${BOOST_DIR}

        echo "Boost: Building..."
        makeflags=$(echo ${MAKE} | grep -e '-j' | perl -p -e 's/^.* -j *([0-9]+).*$/-j\1/')
        ./b2 ${makeflags} link=static || true
        #./b2 ${makeflags} || true

        echo "Boost: Installing..."
        ./b2 ${makeflags} install link=static || true
        #./b2 ${makeflags} install || true
        popd

        echo "Boost: Cleaning up..."
        rm -rf ${BUILD_DIR}

        date > ${DONE_FILE}
        echo "Boost: Done."
        )
        
        if (( $? )); then
            echo 'BEGIN ERROR'
            echo 'Error while building Boost. Aborting.'
            echo 'END ERROR'
            exit 1
        fi
    fi
    
fi



################################################################################
# Configure Cactus
################################################################################


# Set options
if [ "${BOOST_DIR}" = '/usr' -o "${BOOST_DIR}" = '/usr/local' ]; then
    :   # Do nothing
else
    BOOST_INC_DIRS="${BOOST_DIR}/include"
    if [ -d ${BOOST_DIR}/lib64 ]; then
        BOOST_LIB_DIRS="${BOOST_DIR}/lib64"
    else
        BOOST_LIB_DIRS="${BOOST_DIR}/lib"
    fi
fi

if [ -z "${BOOST_LIBS}" ]; then
    BOOST_LIBS="boost_filesystem boost_system"
fi

# Pass options to Cactus
echo "BEGIN MAKE_DEFINITION"
echo "HAVE_BOOST     = 1"
echo "BOOST_DIR      = ${BOOST_DIR}"
echo "BOOST_INC_DIRS = ${BOOST_INC_DIRS}"
echo "BOOST_LIB_DIRS = ${BOOST_LIB_DIRS}"
echo "BOOST_LIBS     = ${BOOST_LIBS}"
echo "END MAKE_DEFINITION"

echo 'INCLUDE_DIRECTORY $(BOOST_INC_DIRS)'
echo 'LIBRARY_DIRECTORY $(BOOST_LIB_DIRS)'
echo 'LIBRARY           $(BOOST_LIBS)'