# vim: set syn=sh:
#Maintainer: Dimitris Tzemos <djemos@slackel.gr>
# Use fake-uname to match the kernel version you want to compile
# based on script for livekernel of JRD <jrd@enialis.net>

KVER=$(uname -r)
pkgname=kernel
pkgver=$(echo $KVER|tr - .)
pkgrel=1dj
#arch=noarch
source=(modules.conf config-$KVER)
docs=("copying")

slackdesc=\
(
#|-----handy-ruler------------------------------------------------------|
"$pkgname (Linux kernel for Salix)"
""
"This is the same kernel config as kernel-huge"
)


build() {
  export KVEREXTRA=$(uname -r)
  export KVER=$(echo $KVEREXTRA|sed 's/\(.*\)-.*/\1/')
  export SRC=$startdir/src
  export DEST=$startdir/pkg
  export nbthreads=$(cat /proc/cpuinfo | grep ^processor | wc -l)
  # clone the kernel
  echo '########################################'
  echo "Cloning /usr/src/linux-$KVER..."
  echo '########################################'
  rsync --inplace --progress -a /usr/src/linux-$KVER/ $SRC/linuxsrc/ || exit 1
  (
    ARCH_BAK=$ARCH
    unset ARCH
    cd $SRC/linuxsrc
    # clean the kernel
    make mrproper || exit 1
    # use a suitable configuration for new kernel.
    cp $SRC/config-$KVEREXTRA .config
    make oldconfig scripts prepare || exit 1
    echo "about to compile..."
    echo "Press any key to continue..."
    read R
    echo '########################################'
    echo "Compiling modules..."
    echo '########################################'
    make -j $nbthreads modules || exit 1
    echo '########################################'
    echo "Compiling kernel image..."
    echo '########################################'
    make -j $nbthreads bzImage || exit 1
    export INSTALL_MOD_PATH=$DEST
    echo '########################################'
    echo "Installing modules..."
    echo '########################################'
    make modules_install || exit 1
    echo '########################################'
    echo "Installing firmware..."
    echo '########################################'
    make firmware_install || exit 1
    unset INSTALL_MOD_PATH
    ARCH=$ARCH_BAK
  )
  if [ $? -ne 0 ]; then
    exit 1
  fi
  echo '########################################'
  echo "copy the kernel..."
  echo '########################################'
  # copy the kernel
  cd $DEST
  mkdir -p boot
  (
    cd boot
    cp $SRC/linuxsrc/.config config-$KVEREXTRA
    cp $SRC/linuxsrc/System.map System.map-$KVEREXTRA
    cp $SRC/linuxsrc/arch/x86/boot/bzImage vmlinuz-$KVEREXTRA
    ln -s config-$KVEREXTRA config
    ln -s System.map-$KVEREXTRA System.map
    ln -s vmlinuz-$KVEREXTRA vmlinuz
  )
  echo '########################################'
  echo "create rc.modules..."
  echo '########################################'
  # create rc.modules
  mkdir -p etc/rc.d
  cat << EOF > etc/rc.d/rc.modules
#!/bin/sh
# rc.modules   $(date) <Generated by kernel>
#
# This file loads extra drivers into the Linux kernel.
# As kmod and udev handle module loading, this file will be mostly
# commented out, but is still useful for loading selected modules at boot time.
#

RELEASE=\$(uname -r)

# Update kernel module dependencies:
if [ -e "/lib/modules/$RELEASE/modules.dep" ]; then 
  echo "Updating module dependency list for $RELEASE:  /sbin/depmod --quick"
  /sbin/depmod --quick
else 
  echo "Creating module dependency list for $RELEASE:  /sbin/depmod --all"
  /sbin/depmod --all
fi

# Run any rc.modules-$(uname -r) file that exists (this is used
# if you have specific modules which should only be loaded for
# specific kernel versions):
if [ -x "/etc/rc.d/rc.modules-$RELEASE" ]; then
  /etc/rc.d/rc.modules-$RELEASE
fi

# Run a local (sysadmin-version) of rc.modules if it exists:
if [ -x "/etc/rc.d/rc.modules.local" ]; then
  /etc/rc.d/rc.modules.local
fi

EOF

  sed -e "s@_ROOT_@$DEST@ ; s/_KVER_/${KVEREXTRA}/" $SRC/modules.conf > $DEST/modules.conf
  export MODULECONF=$DEST/modules.conf
 /sbin/depmod -a -b $DEST -F $DEST/boot/System.map $KVEREXTRA || exit 1

 /bin/chmod 755 etc/rc.d/rc.modules
  rm -rf $DEST/modules.conf $DEST/persist
  unset MODULECONF
  echo '##############################################################################'
  echo "copy the kernel source outside the SLKBUILD tree to keep it...."
  echo '##############################################################################'
  # copy the kernel source outside the SLKBUILD tree to keep it.
  cp -r $SRC/linuxsrc $startdir/
  echo '##############################################################################'
  echo "copy files necessary for later builds, like nvidia, ati, vbox and vmware...."
  echo '##############################################################################'
  # copy files necessary for later builds, like nvidia, ati, vbox and vmware
  (
    cd $SRC/linuxsrc
    mkdir -p $DEST/usr/src/linux-$KVER/include
    mkdir -p $DEST/usr/src/linux-$KVER/arch
    for i in acpi asm-generic config drm generated linux math-emu media net pcmcia scsi sound trace video xen; do
      cp -rf include/$i $DEST/usr/src/linux-$KVER/include/
    done
    cp -rf arch/x86 $DEST/usr/src/linux-$KVER/arch/
    cp -rf scripts Makefile Kbuild Module.symvers .config $DEST/usr/src/linux-$KVER/
    # fix permissions on scripts dir
    chmod 755 -R $DEST/usr/src/linux-$KVER/scripts
    echo '########################################'
    echo "copy Kconfig files...."
    echo '########################################'
    # copy Kconfig files
    for i in $(find . -name "Kconfig*"); do
      mkdir -p $DEST/usr/src/linux-$KVER/$(dirname $i)
      cp $i $DEST/usr/src/linux-$KVER/$i
    done
    echo '###########################################################'
    echo "delete the kernel binary in the sources...."
    echo '###########################################################'
    # delete the kernel binary in the sources
    rm -f $DEST/usr/src/linux-$KVER/arch/x86/boot/compressed/vmlinux $DEST/usr/src/linux-$KVER/arch/x86/boot/compressed/vmlinux.bin* $DEST/usr/src/linux-$KVER/arch/x86/boot/vmlinux.bin $DEST/usr/src/linux-$KVER/arch/x86/boot/bzImage
    echo '########################################'
    echo "delete all .o files...."
    echo '########################################'
    # delete all .o files
    for i in $(find $DEST/usr/src/linux-$KVER -name '*.o'); do
      rm -f $i
    done
  )
  echo '###########################################################'
  echo "fix build and source link in /lib/modules/XXX/...."
  echo '###########################################################'
  # fix build and source link in /lib/modules/XXX/
  (
    cd $DEST/lib/modules/$KVEREXTRA/
    rm -f build && ln -s /usr/src/linux-$KVER build
    rm -f source && ln -s /usr/src/linux-$KVER source
  )
}