#!/bin/sh

# variables
CWD=$(pwd)

PRGNAM=$(basename $CWD)
VERSION=4.6.0
ARCH=$(uname -m)
BUILD=1


TAG=gwh
TMP=/tmp/$TAG
PKG=$TMP/pkg-$PRGNAM
OUTPUT=/tmp

PREFIX=/usr
DOCS="ABOUT-NLS AUTHORS ChangeLog COPYING* INSTALL NEWS README THANKS TODO"

SLCKFLAGS="-O2"
case $ARCH in
    "x86_64")
        SLCKFLAGS="$SLCKFLAGS -fPIC"
        ;;
    *)
esac

# nettoyage préalable
rm -fr $PKG $TMP/$PRGNAM-$VERSION

mkdir -p $PKG

# mise en place
( cd $TMP
    TMPVER=v$(echo $VERSION | tr . _)
    [ ! -e $CWD/gambc-$TMPVER-devel.tgz ] && \
        wget -c http://www.iro.umontreal.ca/~gambit/download/gambit/v4.6/source/gambc-$TMPVER-devel.tgz \
        -O $CWD/gambc-$TMPVER-devel.tgz
    tar xf $CWD/gambc-$TMPVER-devel.tgz
    mv gambc-$TMPVER-devel $PRGNAM-$VERSION
)

( cd $TMP/$PRGNAM-$VERSION
    # configuration
    CCPFLAGS=$SLCKFLAGS \
    CFLAGS=$SLCKFLAGS \
    ./configure \
        --prefix=$PREFIX \
        --mandir=$PREFIX/man \
        --infodir=$PREFIX/info \
        --docdir=$PREFIX/doc/$PRGNAM-$VERSION \
        --includedir=$PREFIX/include \
        --libdir=$PREFIX/lib$(echo $ARCH | grep -o 64) \
        --enable-single-host \
        --enable-gcc-opts

    # compilation
    make -j3 PREFIX=$PREFIX
    # installation
    make install DESTDIR=$PKG
    # WTF .bat
    for b in $PKG$PREFIX/bin/*.bat ; do
        mv $b ${b%bat}sh
    done
)

# correction
chown -R root:root $PKG/*

mkdir -p $PKG/usr/doc/$PRGNAM-$VERSION
( cd $TMP/$PRGNAM-$VERSION
    cp -R $DOCS $PKG/usr/doc/$PRGNAM-$VERSION
)

[ -d $PKG/usr/man ] && find $PKG/usr/man -type f -name "*.?" -exec gzip -9f {} \;
[ -d $PKG/usr/info ] && find $PKG/usr/info -type f -name "*.info*" -exec gzip -9f {} \;
[ -d $PKG/usr/info ] && rm $PKG/usr/info/dir

# Strip binaries
find $PKG | xargs file | grep "executable" | grep ELF | cut -f 1 -d : | xargs strip --strip-unneeded 2> /dev/null
find $PKG | xargs file | grep "shared object" | grep ELF | cut -f 1 -d : | xargs strip --strip-unneeded 2> /dev/null

# embaumement
mkdir -p $PKG/install
cat <<EOF > $PKG/install/doinst.sh
cd /usr/info
[ -e dir ] && rm dir
[ -e dir.gz ] && rm dir.gz
[ -e dir.new ] && rm dir.new
for file in \$(ls *.gz | grep -v ".*\-[0-9]\+\.gz")
do
    install-info \$file ./dir
done
EOF
cat <<EOF > $PKG/install/slack-desc
$PRGNAM: $PRGNAM (Scheme programming system)
$PRGNAM:
$PRGNAM: Gambit-C includes a Scheme interpreter and a Scheme compiler which can be used
$PRGNAM: to build standalone executables.  Because the compiler generates portable
$PRGNAM: C code it is fairly easy to port to any platform with a decent C compiler.
$PRGNAM: 
$PRGNAM: The Gambit-C system conforms to the R4RS, R5RS and IEEE Scheme standards.
$PRGNAM:
$PRGNAM:
$PRGNAM: http://dynamo.iro.umontreal.ca/~gambit/wiki/index.php/Main_Page
$PRGNAM:
EOF

# empaquetage
( cd $PKG
    makepkg -l y -c n $OUTPUT/$PRGNAM-$(echo $VERSION | tr -d -)-$ARCH-$BUILD$TAG.txz
)