#!/bin/bash
#
#  kernel-satan.SlackBuild is free software; you can redistribute it and/or modify it under the
#  terms of the GNU General Public License as published by the Free Software
#  Foundation; either version 2 of the License, or any later version.
#
#  kernel-satan.SlackBuild is distributed in the hope that it will be useful, but WITHOUT ANY
#  WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
#  A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
#
#  You should have received a copy of the GNU General Public License along with
#  this program; if not, write to the Free Software Foundation, Inc., 59 Temple
#  Place - Suite 330, Boston, MA 02111-1307, USA
#
# slackbuild for kernel-satan
# by rhatto at riseup.net
#

CWD="`pwd`"

if [ -f ~/.slackbuildrc ]; then
  source ~/.slackbuildrc
elif [ -f /etc/slackbuildrc ]; then
  source /etc/slackbuildrc
fi

PACKAGE="kernel-satan"
KERNEL_VERSION="2.6.22"
EXTRAVERSION="18"
ARCH="x86_64"
BUILD="2rha"
PATCHSET="vs2.2.0.6"
PATCH_VERSION="2.6.22.18-$PATCHSET"
TMP=${TMP:=/tmp}
SRC_DIR=${SRC:=$CWD}
REPOS=${REPOS:=$TMP}

if [ ! -z "$EXTRAVERSION" ]; then
  KERNEL_VERSION=$KERNEL_VERSION.$EXTRAVERSION
fi

KERNEL="linux-$KERNEL_VERSION.tar.bz2"
PATCH="patch-$PATCH_VERSION.diff"
KERNEL_URL="http://www.kernel.org/pub/linux/kernel/v2.6/$KERNEL"
PATCH_URL="http://ftp.linux-vserver.org/pub/kernel/vs2.2/$PATCH"
SRC_DIR="$SRC_DIR/kernel"

# -------  error codes for createpkg  --------------
ERROR_WGET=31;      ERROR_MAKE=32;      ERROR_INSTALL=33
ERROR_MD5=34;       ERROR_CONF=35;      ERROR_HELP=36
ERROR_TAR=37;       ERROR_MKPKG=38;     ERROR_GPG=39
ERROR_PATCH=40

mkdir -p $SRC_DIR

if [ ! -f "$SRC_DIR/$KERNEL" ]; then
  rm -f $SRC_DIR/$KERNEL.sign
  wget "$KERNEL_URL" -O "$SRC_DIR/$KERNEL" || exit $ERROR_WGET
  wget "$KERNEL_URL.sign" -O "$SRC_DIR/$KERNEL.sign" || exit $ERROR_WGET
fi

if [ ! -f "$CWD/$PATCH" ] && [ ! -f "$SRC_DIR/$PATCH" ]; then
  wget "$PATCH_URL" -O "$SRC_DIR/$PATCH" || exit $ERROR_WGET
fi

TMP="$TMP/$PACKAGE"
mkdir -p $TMP
cd $TMP

rm -rf linux-$KERNEL_VERSION*
tar jxvf $SRC_DIR/$KERNEL || exit $ERROR_TAR

if [ ! -z "$PATCHSET" ]; then
  mv linux-$KERNEL_VERSION linux-$KERNEL_VERSION-$PATCHSET
  KERNEL_VERSION="$KERNEL_VERSION-$PATCHSET"
fi

cp $CWD/config-$KERNEL_VERSION linux-$KERNEL_VERSION/.config || exit $ERROR_CONF
cd linux-$KERNEL_VERSION

if [ -f "$CWD/$PATCH" ]; then
  patch -p1 < $CWD/$PATCH || exit $ERROR_PATCH
else
  patch -p1 < $SRC_DIR/$PATCH || exit $ERROR_PATCH
fi

if [ ! -z "$EXTRAVERSION" ] && [ ! -z "$PATCHSET" ]; then
  sed -e "s/^EXTRAVERSION =*$/EXTRAVERSION = \.$EXTRAVERSION-$PATCHSET/" Makefile > Makefile.tmp
elif [ ! -z "$PATCHSET" ]; then
  sed -e "s/^EXTRAVERSION =*$/EXTRAVERSION = -$PATCHSET/" Makefile > Makefile.tmp
fi
mv Makefile.tmp Makefile

make oldconfig || exit $ERROR_CONF
time make || exit $ERROR_MAKE

# make the package

PKG="$TMP/package-$PACKAGE"

mkdir -p $PKG/{install,boot,usr/doc}

cp System.map $PKG/boot/System.map-$KERNEL_VERSION
cp .config $PKG/boot/config-$KERNEL_VERSION
cp arch/$ARCH/boot/bzImage $PKG/boot/vmlinuz-$KERNEL_VERSION

cat << EOF > $PKG/install/slack-desc
kernel-satan: kernel-satan (kernel for sarava.org's satangoss machine)
kernel-satan:
kernel-satan:
kernel-satan:
kernel-satan:
kernel-satan:
kernel-satan:
kernel-satan:
kernel-satan:
kernel-satan:
kernel-satan:
EOF

VERSION="`echo $KERNEL_VERSION | sed -e 's/-/_/g'`"

# docs
mkdir -p $PKG/usr/doc/$PACKAGE-$VERSION
for file in COPYING CREDITS MAINTAINERS README REPORTING-BUGS; do
  cp $file* $PKG/usr/doc/$PACKAGE-$VERSION/
done

cd $PKG

( cd boot && ln -s vmlinuz-$KERNEL_VERSION vmlinuz )
( cd boot && ln -s config-$KERNEL_VERSION config )
( cd boot && ln -s System.map-$KERNEL_VERSION System.map )

makepkg -c y -l y $REPOS/$PACKAGE-$VERSION-$ARCH-$BUILD.tgz || exit $ERROR_MKPKG

if [ "$CLEANUP" == "yes" ]; then
  rm -rf $TMP
fi