#! /bin/bash

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

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



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

echo "BEGIN MESSAGE"
echo "Using bundled Vecmathlib..."
echo "END MESSAGE"

# Set locations
THORN=Vecmathlib
NAME=eschnett-vecmathlib-293067dda922
SRCDIR=$(dirname $0)
BUILD_DIR=${SCRATCH_BUILD}/build/${THORN}
INSTALL_DIR=${SCRATCH_BUILD}/external/${THORN}
DONE_FILE=${SCRATCH_BUILD}/done/${THORN}
VECMATHLIB_DIR=${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 "Vecmathlib has already been built; doing nothing"
    echo "END MESSAGE"
else
    echo "BEGIN MESSAGE"
    echo "Building Vecmathlib"
    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}
    
    echo "Vecmathlib: Preparing directory structure..."
    mkdir build external done 2> /dev/null || true
    rm -rf ${BUILD_DIR} ${INSTALL_DIR}
    mkdir ${BUILD_DIR} ${INSTALL_DIR}
    
    echo "Vecmathlib: Unpacking archive..."
    pushd ${BUILD_DIR}
    ${TAR?} xzf ${SRCDIR}/dist/${NAME}.tar.gz
    
    echo "Vecmathlib: Building..."
    cd ${NAME}
    # nothing to build
    
    echo "Vecmathlib: Testing..."
    if echo '' ${CXXFLAGS} | grep -q -v -e -ftrapv; then
        ${MAKE} test
        ./test
    else
        echo '[skipping test because -ftrapv is used]'
    fi
    
    echo "Vecmathlib: Installing..."
    mkdir ${INSTALL_DIR}/include
    cp *.h ${INSTALL_DIR}/include
    mkdir ${INSTALL_DIR}/doc
    cp LICENCE README *.rst ${INSTALL_DIR}/doc
    mkdir ${INSTALL_DIR}/examples
    cp *.cc ${INSTALL_DIR}/examples
    popd
    
    echo "Vecmathlib: Cleaning up..."
    rm -rf ${BUILD_DIR}
    
    date > ${DONE_FILE}
    echo "Vecmathlib: Done."
    )
    
    if (( $? )); then
        echo 'BEGIN ERROR'
        echo 'Error while building Vecmathlib. Aborting.'
        echo 'END ERROR'
        exit 1
    fi
fi



################################################################################
# Set options
################################################################################
    
VECMATHLIB_INC_DIRS="${VECMATHLIB_DIR}/include"
VECMATHLIB_LIB_DIRS=''
VECMATHLIB_LIBS=''



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

VECMATHLIB_INC_DIRS="$(${CCTK_HOME}/lib/sbin/strip-incdirs.sh ${VECMATHLIB_INC_DIRS})"
VECMATHLIB_LIB_DIRS="$(${CCTK_HOME}/lib/sbin/strip-libdirs.sh ${VECMATHLIB_LIB_DIRS})"

# Pass options to Cactus
echo "BEGIN MAKE_DEFINITION"
echo "VECMATHLIB_DIR      = ${VECMATHLIB_DIR}"
echo "VECMATHLIB_INC_DIRS = ${VECMATHLIB_INC_DIRS}"
echo "VECMATHLIB_LIB_DIRS = ${VECMATHLIB_LIB_DIRS}"
echo "VECMATHLIB_LIBS     = ${VECMATHLIB_LIBS}"
echo "END MAKE_DEFINITION"

echo 'INCLUDE_DIRECTORY $(VECMATHLIB_INC_DIRS)'
echo 'LIBRARY_DIRECTORY $(VECMATHLIB_LIB_DIRS)'
echo 'LIBRARY           $(VECMATHLIB_LIBS)'