#! /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 "${HWLOC_DIR}" ]; then
    echo "BEGIN MESSAGE"
    echo "hwloc selected, but HWLOC_DIR not set. Checking some places..."
    echo "END MESSAGE"
    
    DIRS="/usr /usr/local /usr/local/packages /usr/local/apps /opt/local ${HOME} c:/packages"
    for dir in $DIRS; do
        # libraries might have different file extensions
        for libext in a so dylib; do
            # libraries can be in /lib or /lib64
            for libdir in lib64 lib; do
                FILES="include/hwloc.h $libdir/libhwloc.$libext"
                # assume this is the one and check all needed files
                HWLOC_DIR="$dir"
                for file in $FILES; do
                    # discard this directory if one file was not found
                    if [ ! -r "$dir/$file" ]; then
                        unset HWLOC_DIR
                        break
                    fi
                done
                # don't look further if all files have been found
                if [ -n "$HWLOC_DIR" ]; then
                    break
                fi
            done
            # don't look further if all files have been found
            if [ -n "$HWLOC_DIR" ]; then
                break
            fi
        done
        # don't look further if all files have been found
        if [ -n "$HWLOC_DIR" ]; then
            break
        fi
    done
    
    if [ -z "$HWLOC_DIR" ]; then
        echo "BEGIN MESSAGE"
        echo "hwloc not found"
        echo "END MESSAGE"
    else
        echo "BEGIN MESSAGE"
        echo "Found hwloc in ${HWLOC_DIR}"
        echo "END MESSAGE"
    fi
fi

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

if [ -z "${HWLOC_DIR}"                                                  \
     -o "$(echo "${HWLOC_DIR}" | tr '[a-z]' '[A-Z]')" = 'BUILD' ]
then
    echo "BEGIN MESSAGE"
    echo "Using bundled hwloc..."
    echo "END MESSAGE"
    
    # Set locations
    THORN=hwloc
    NAME=hwloc-1.5.1
    SRCDIR=$(dirname $0)
    BUILD_DIR=${SCRATCH_BUILD}/build/${THORN}
    if [ -z "${HWLOC_INSTALL_DIR}" ]; then
        INSTALL_DIR=${SCRATCH_BUILD}/external/${THORN}
    else
        echo "BEGIN MESSAGE"
        echo "Installing hwloc into ${HWLOC_INSTALL_DIR}"
        echo "END MESSAGE"
        INSTALL_DIR=${HWLOC_INSTALL_DIR}
    fi
    DONE_FILE=${SCRATCH_BUILD}/done/${THORN}
    HWLOC_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 "hwloc has already been built; doing nothing"
        echo "END MESSAGE"
    else
        echo "BEGIN MESSAGE"
        echo "Building hwloc"
        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
        export LDFLAGS
        unset LIBS
        if echo '' ${ARFLAGS} | grep 64 > /dev/null 2>&1; then
            export OBJECT_MODE=64
        fi
        export HWLOC_PCI_CFLAGS="$(echo $(for dir in ${PCIUTILS_INC_DIRS} ${ZLIB_INC_DIRS}; do echo $dir; done | sed -e 's/^/-I/'))"
        export HWLOC_PCI_LIBS="$(echo $(for dir in ${PCIUTILS_LIB_DIRS} ${ZLIB_LIB_DIRS}; do echo $dir; done | sed -e 's/^/-L/') $(for dir in ${PCIUTILS_LIBS} ${ZLIB_LIBS}; do echo $dir; done | sed -e 's/^/-l/'))"
        
        echo "hwloc: Preparing directory structure..."
        mkdir build external done 2> /dev/null || true
        rm -rf ${BUILD_DIR} ${INSTALL_DIR}
        mkdir ${BUILD_DIR} ${INSTALL_DIR}
        
        echo "hwloc: Unpacking archive..."
        pushd ${BUILD_DIR}
        ${TAR?} xzf ${SRCDIR}/dist/${NAME}.tar.gz
        
        echo "hwloc: Configuring..."
        cd ${NAME}
        # Disable Cairo and XML explicitly, since configure may pick
        # it up if it is installed on the system, but our final link
        # line may not link against these libraries. (We could use our
        # own libxml2 library if we want.)
        if test -n "${HAVE_PCIUTILS}"; then
            handle_pci='--enable-pci'
        else
            handle_pci='--disable-pci'
        fi
        ./configure --prefix=${HWLOC_DIR} ${handle_pci} --disable-cairo --disable-libxml2
        
        echo "hwloc: Building..."
        ${MAKE}
        
        echo "hwloc: Installing..."
        ${MAKE} install
        popd
        
        echo "hwloc: Cleaning up..."
        rm -rf ${BUILD_DIR}
        
        date > ${DONE_FILE}
        echo "hwloc: Done."
        
        )
        
        if (( $? )); then
            echo 'BEGIN ERROR'
            echo 'Error while building hwloc. Aborting.'
            echo 'END ERROR'
            exit 1
        fi
    fi
    
fi



# TODO: use pkginfo instead to define these
HWLOC_INC_DIRS="${HWLOC_DIR}/include"
HWLOC_LIB_DIRS="${HWLOC_DIR}/lib"
HWLOC_LIBS='hwloc'



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

# Pass options to Cactus
echo "BEGIN MAKE_DEFINITION"
echo "HAVE_HWLOC     = 1"
echo "HWLOC_DIR      = ${HWLOC_DIR}"
echo "HWLOC_INC_DIRS = ${HWLOC_INC_DIRS}"
echo "HWLOC_LIB_DIRS = ${HWLOC_LIB_DIRS}"
echo "HWLOC_LIBS     = ${HWLOC_LIBS}"
echo "END MAKE_DEFINITION"

echo 'INCLUDE_DIRECTORY $(HWLOC_INC_DIRS)'
echo 'LIBRARY_DIRECTORY $(HWLOC_LIB_DIRS)'
echo 'LIBRARY           $(HWLOC_LIBS)'