configure

#!/usr/bin/env bash

export unset CDPATH
DISTRIB=tree
PLATFORM=$(uname)
PREFIX="/usr"
LDFLAGS=
UNICODE_LDFLAGS=
OTHER_MODULES=
INCLUDE_PATH='$(PREFIX)/include'
MODULE_PATH='$(PREFIX)/lib/grace/modules'
OBJECT_PATH='$(PREFIX)/lib/grace'

other_modules=(
    mirrors
)

ADVISE_END=
advise() {
    why=$1
    ADVISE_END=$why
    echo
    echo "Problem configuring $why."
    if [ -e "environ-$PLATFORM" ]
    then
        echo
        echo Running the environ-$PLATFORM script may help to diagnose or
        echo solve this problem.
        echo
        if ! [ "$IN_ENVIRON_SCRIPT" ]
        then
            echo Re-running configure inside environ-$PLATFORM.
            echo
            if ./environ-$PLATFORM ./configure
            then
                echo
                echo As configure succeeded, launching a suitable environment
                echo in which to run other programs. To obtain this environment
                echo in future, run ./environ-$PLATFORM.
                echo
                exec ./environ-$PLATFORM
            fi
            exit $?
        fi
    fi
}
fail() {
    advise "$@"
    echo Failed.
    exit 1
}

while [ $# -gt 0 ]
do
    if [ "$1" = "--prefix" ]
    then
        PREFIX=`readlink -f $2`
        shift
    elif [ "$1" = "--static" ]
    then
        STATIC=y
    elif [ "$1" = "--includedir" ]
    then
        INCLUDE_PATH=`readlink -f $2` #convert the potentially relative path to absolute before storing it
        shift
    elif [ "$1" = "--libdir" ]
    then
        MODULE_PATH=`readlink -f $2`/grace/modules
        OBJECT_PATH=`readlink -f $2`/grace
        shift
    elif [ "$1" = "--objectpath" ]
    then
        OBJECT_PATH=`readlink -f $2`
        shift
    elif [ "$1" = "--help" ]
    then
        echo "Available flags:"
        echo " --prefix <path>"
        echo " --static {tarball only}"
        echo " --includedir <path>"
        echo " --libdir <path>"
        echo " --objectpath <path>"
        exit 0
    else
        echo "Unknown argument '$1'."
        exit 1
    fi
    shift
done

if [ "$INCLUDE_PATH" = "" ]
then
    INCLUDE_PATH="$PREFIX/include"  #These are the defaults, relative to PREFIX
fi

if [ "$MODULE_PATH" = "" ]
then
    MODULE_PATH="$PREFIX/lib/grace/modules"
fi

if [ "$OBJECT_PATH" = "" ] 
then
    OBJECT_PATH=`dirname $MODULE_PATH`
fi

echo -n "Locating GNU make... "
GMAKE_PATH=$(which gmake 2>/dev/null)
if [ "$GMAKE_PATH" ]
then
    echo $GMAKE_PATH
else
    GMAKE_PATH=$(which make 2>/dev/null)
    if [ "$GMAKE_PATH" ]
    then
        echo $GMAKE_PATH
    else
        echo "none."
        advise "GNU make"
    fi
fi

MK=make
if gmake -v 2>&1 | grep -q GNU
then
    MK=gmake
elif make -v 2>&1 | grep -q GNU
then
    MK=make
else
    echo "This software requires GNU make to build."
    echo "Substitute the path to your GNU make below."
fi

STUBS=$(cd stubs; ls *.grace | tr \\n ' ')
LIBRARY_MODULES=$(cd modules; ls *.grace | grep -v Test | tr \\n ' ')
ICONS=$(cd js; ls *.png | tr \\n ' ')

cat <<EOT > Makefile.conf
PREFIX ?= $PREFIX
LDFLAGS = $LDFLAGS -lm
UNICODE_LDFLAGS = $UNICODE_LDFLAGS
UNICODE_MODULE = $UNICODE_MODULE
STATIC_MODULES = $STATIC_MODULES
OTHER_MODULES = ${OTHER_MODULES[@]}
STUBS = $STUBS
LIBRARY_MODULES = $LIBRARY_MODULES
ICONS = $ICONS
INCLUDE_PATH = $INCLUDE_PATH
MODULE_PATH = $MODULE_PATH
OBJECT_PATH = $OBJECT_PATH
EOT

if [ "$ADVISE_END" ]
then
    echo configure encountered a non-fatal configuration problem.
    advise "$ADVISE_END"
    echo
    echo This issue did not cause configure to fail, but you may wish to
    echo investigate it.
fi