#!/bin/sh
# Copyright 2016 - 2024  Dimitris Tzemos <dijemos@gmail.com>
# All rights reserved.
#
#   Permission to use, copy, modify, and distribute this software for
#   any purpose with or without fee is hereby granted, provided that
#   the above copyright notice and this permission notice appear in all
#   copies.
#
#   THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
#   WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
#   MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
#   IN NO EVENT SHALL THE AUTHORS AND COPYRIGHT HOLDERS AND THEIR
#   CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
#   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
#   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
#   USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
#   ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
#   OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
#   OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
#   SUCH DAMAGE.
# -----------------------------------------------------------------------------

PRGNAM=linux
PRGNAMM=kernel-source
VERSION=${VERSION:-5.15.63}
BUILD=${BUILD:-1}
TAG=${TAG:-dj}
ARCH=noarch
NUMJOBS=${NUMJOBS:-" -j4 "}

# Where do we look for sources?
SRCDIR=$(cd $(dirname $0); pwd)

CWD=$(pwd)
TMP=${TMP:-/tmp}
PKG=$TMP/pkg-$PRGNAM

# If you want automatic download to work, supply a URL for 'SRCURL' below:
SOURCE="$SRCDIR/${PRGNAM}-${VERSION}.tar.xz"
SRCURL="https://www.kernel.org/pub/linux/kernel/v4.x/linux-${VERSION}.tar.xz"
if [ ! -r $SOURCE ]; then
	wget $SRCURL
fi
	
rm -rf $PKG
mkdir -p $TMP $PKG
cd $TMP
rm -rf $PRGNAM-$VERSION
tar xvf $CWD/$PRGNAM-$VERSION.tar.?z* || exit 1
cd $PRGNAM-$VERSION || exit 1
  (
    ARCH_BAK=$ARCH
    unset ARCH
    make mrproper || exit 1
    zcat /proc/config.gz > .config || exit 1
    make oldconfig scripts prepare clean || exit 1
    ARCH=$ARCH_BAK
  )
    mkdir -p $PKG/usr/src/linux-$VERSION/ 
    echo "Please wait .... kernel source package is build"
    cp -r * $PKG/usr/src/linux-$VERSION/ || exit 1
    cd $PKG/usr/src/
    ln -sf linux-$VERSION linux

# Add a package description and the post-install script if it exists:
mkdir -p $PKG/install
cat $CWD/slack-desc > $PKG/install/slack-desc
[ -f $CWD/doinst.sh ] && cat $CWD/doinst.sh > $PKG/install/doinst.sh

# Build package:
cd $PKG
/sbin/makepkg -l y -c n $CWD/$PRGNAMM-$VERSION-$ARCH-$BUILD$TAG.txz
md5sum $CWD/$PRGNAMM-$VERSION-$ARCH-$BUILD$TAG.txz > $CWD/$PRGNAMM-$VERSION-$ARCH-$BUILD$TAG.md5

rm -rf $PKG $TMP/$PRGNAM-$VERSION