#vim: set syn=sh:
#Maintainer: JRD <jrd@enialis.net>
# Use fake-uname to match the kernel version you want to compile

KVER=$(uname -r)
pkgname=kernelive
pkgver=$(echo $KVER|tr - .)
pkgrel=1cp
arch=i486
source=(config-$KVER.live config-$KVER.live.patch aufs2-standalone.tar.gz squashfs3.4.tgz lzma457.tgz sqlzma2k-3.4.patch sqlzma.h sqmagic.h modules.conf Makefile)
sourcetemplate=http://enialis.net/~jrd/salix/$pkgname/$pkgver-$pkgrel/
docs=("readme" "copying" "sqlzma.txt")

slackdesc=\
(
#|-----handy-ruler------------------------------------------------------|
"$pkgname (Linux kernel for Salix Live)"
"Linux kernel for Salix Live is compiled with support for"
"squashfs, lzma & aufs as well as for most hardware, "
"including SCSI, USB booting devices, etc.. "
"" 
"Drivers (such as for CD-ROM drives on proprietary interfaces,"
"or ethernet cards) may be loaded as modules."
"See /etc/rc.d/rc.modules for examples"
)


build() {
  export KVEREXTRA=$(uname -r)
  export KVER=$(echo $KVEREXTRA|sed 's/\(.*\)-.*/\1/')
  export SRC=$startdir/src
  export DEST=$startdir/pkg
  # clone the kernel
  echo '########################################'
  echo "Cloning /usr/src/linux-$KVER..."
  echo '########################################'
  cp -a /usr/src/linux-$KVER $SRC/linuxsrc || exit 1
  cd $SRC/linuxsrc
  # clean the kernel
  make mrproper || exit 1
  echo '* Applying aufs2-standalone.patch... *'
  # patch the kernel to use a new FS : aufs (an unionfs like filesystem)
  patch -p1 < $SRC/aufs2-standalone/aufs2-standalone.patch || exit 1
  if [ -e $SRC/aufs2-standalone/aufs2-base.patch ]; then
    echo '* Applying aufs2-base.patch... *'
    patch -p1 < $SRC/aufs2-standalone/aufs2-base.patch || exit 1
  fi
  # patch the kernel to use a specific squashfs FS : this one could use a compression algorithm
  # We must first remove the squashfs 4.0 code without LZMA and then use the squashfs 3.4 which
  # has patches for LZMA
  sed 's/4\.0/3.4/' fs/squashfs/Kconfig > squashfs-Kconfig
  rm -r fs/squashfs/*
  mv squashfs-Kconfig fs/squashfs/Kconfig
  echo '* Applying squashfs3.4-patch... *'
  patch -p1 < $SRC/squashfs3.4/kernel-patches/linux-2.6.30/squashfs3.4-patch || exit 1
  echo '* Applying sqlzma2k-3.4.patch...*'
  # patch for squashfs 3.4
  patch -p1 < $SRC/sqlzma2k-3.4.patch || exit 1
  cp $SRC/sqlzma.h $SRC/sqmagic.h fs/squashfs/
  # squashfs-tools is already patched to be aware of LZMA
  # LZMA is already patched to build a kernel module
  # install the AUFS code in the kernel
  cp -r $SRC/aufs2-standalone/fs/aufs $SRC/linuxsrc/fs/
  cp $SRC/aufs2-standalone/include/linux/aufs_type.h $SRC/linuxsrc/include/linux/
  echo '* Applying aufs2-kbuild.patch... *'
  patch -p1 < $SRC/aufs2-standalone/aufs2-kbuild.patch || exit 1
  # use a suitable configuration for live environnement.
  cp $SRC/config-$KVEREXTRA.live .config
  make oldconfig scripts prepare || exit 1
  # compile the kernel (without squashfs for now)
  echo '########################################'
  echo "Compiling modules..."
  echo '########################################'
  make -j 3 modules || exit 1
  echo '########################################'
  echo "Compiling kernel image..."
  echo '########################################'
  make -j 3 bzImage || exit 1
  export INSTALL_MOD_PATH=$DEST
  echo '########################################'
  echo "Installing modules..."
  echo '########################################'
  make modules_install || exit 1
  # now compile the squashfs+lzma modules
  cd $SRC
  echo '########################################'
  echo "Compiling/installing squashfs + LZMA..."
  echo '########################################'
  make || exit 1
  unset INSTALL_MOD_PATH
  # create the good structure for the modules
  cd $DEST/lib/modules/$KVEREXTRA-live
  rm -f modules.*
  mkdir -p kernel/fs/squashfs
  cp $SRC/lzma457/C/Compress/Lzma/kmod/{sq,un}lzma.ko kernel/fs/squashfs/
  cp $SRC/linuxsrc/fs/squashfs/squashfs.ko kernel/fs/squashfs/
  # copy the kernel
  cd $DEST
  mkdir -p boot
  cd boot
  cp $SRC/linuxsrc/.config config-$KVEREXTRA-live
  cp $SRC/linuxsrc/System.map System.map-$KVEREXTRA-live
  cp $SRC/linuxsrc/arch/x86/boot/bzImage vmlinuz-$KVEREXTRA-live
  ln -s config-$KVEREXTRA-live config
  ln -s System.map-$KVEREXTRA-live System.map
  ln -s vmlinuz-$KVEREXTRA-live vmlinuz
  cd ..
  # create rc.modules
  mkdir -p etc/rc.d
  cat << EOF > etc/rc.d/rc.modules
#!/bin/sh
# rc.modules   $(date) <Generated by kernelive>
#
# 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)

echo "Updating module dependencies for Linux \$RELEASE"

/sbin/depmod -A

EOF
  sed -e "s@_ROOT_@$DEST@ ; s/_KVER_/${KVEREXTRA}-live/" $SRC/modules.conf > $DEST/modules.conf
  export MODULECONF=$DEST/modules.conf
  depmod -a -b $DEST -F $DEST/boot/System.map $KVEREXTRA-live || exit 1
  modprobe -l | sed -e "s/^.*\/\(.*\)\.ko$/# \/sbin\/modprobe \1/m ; s/# \(.* ac$\)/\1/ ; s/# \(.* battery$\)/\1/ ; s/# \(.* button$\)/\1/ ; s/# \(.* fan$\)/\1/ ; s/# \(.* fuse$\)/\1/ ; s/# \(.* processor$\)/\1/ ; s/# \(.* thermal$\)/\1/ ; s/# \(.* video$\)/\1/ ; s/# \(.* lp$\)/\1/ ; s/# \(.* parport$\)/\1/ ; s/# \(.* parport_pc$\)/\1/ " | sort >> etc/rc.d/rc.modules
  chmod 755 etc/rc.d/rc.modules
  rm -rf $DEST/modules.conf $DEST/persist
  unset MODULECONF
  # copy files necessary for later builds, like nvidia and vmware
  cd $SRC/linuxsrc/include
  mkdir -p $DEST/usr/src/linux-$KVER/include
  for i in acpi asm-generic asm-x86 linux math-emu media net pcmcia scsi sound video; do
    cp -rf $i $DEST/usr/src/linux-$KVER/include/
  done
  ( cd $DEST/usr/src/linux-$KVER/include; ln -sf asm-x86 asm )
  ( cd $DEST/usr/src/linux-$KVER/include/linux; ln -sf autoconf.h config.h )
  cd $SRC/linuxsrc
  cp .config $DEST/usr/src/linux-$KVER
  cp Makefile ${dest}/usr/src/linux-$KVER
  cp Module.symvers $DEST/usr/src/linux-$KVER
  cp -a scripts $DEST/usr/src/linux-$KVER
  # fix permissions on scripts dir
  chmod 755 -R $DEST/usr/src/linux-$KVER/scripts
  mkdir -p $DEST/usr/src/linux-$KVER/.tmp_versions
  mkdir -p $DEST/usr/src/linux-$KVER/arch/x86/kernel
  cp arch/x86/Makefile* $DEST/usr/src/linux-$KVER/arch/x86/
  cp arch/x86/kernel/asm-offsets.s $DEST/usr/src/linux-$KVER/arch/x86/kernel/
  # add headers for lirc package
  mkdir -p $DEST/usr/src/linux-$KVER/drivers/media/video
  cp drivers/media/video/*.h  $DEST/usr/src/linux-$KVER/drivers/media/video/
  for i in bt8xx cpia2 cx25840 cx88 em28xx et61x251 pwc saa7134 sn9c102 usbvideo zc0301; do
    mkdir -p $DEST/usr/src/linux-$KVER/drivers/media/video/$i
    cp -a drivers/media/video/$i/*.h $DEST/usr/src/linux-$KVER/drivers/media/video/$i
  done
  # add dm headers
  mkdir -p $DEST/usr/src/linux-$KVER/drivers/md
  cp drivers/md/*.h $DEST/usr/src/linux-$KVER/drivers/md
  # add inotify.h
  mkdir -p $DEST/usr/src/linux-$KVER/include/linux
  cp include/linux/inotify.h $DEST/usr/src/linux-$KVER/include/linux/
  # add wireless headers
  mkdir -p $DEST/usr/src/linux-$KVER/net/mac80211/
  cp net/mac80211/*.h $DEST/usr/src/linux-$KVER/net/mac80211/
  # add CLUSTERIP file for iptables
  mkdir -p $DEST/usr/src/linux-$KVER/net/ipv4/netfilter/
  cp net/ipv4/netfilter/ipt_CLUSTERIP.c $DEST/usr/src/linux-$KVER/net/ipv4/netfilter/
  # add xfs and shmem for aufs building
  mkdir -p $DEST/usr/src/linux-$KVER/fs/xfs
  mkdir -p $DEST/usr/src/linux-$KVER/mm
  cp fs/xfs/xfs_sb.h $DEST/usr/src/linux-$KVER/fs/xfs/xfs_sb.h
  cp mm/shmem.c $DEST/usr/src/linux-$KVER/mm/shmem.c
  # add vmlinux
  cp vmlinux $DEST/usr/src/linux-$KVER  
  # copy in Kconfig files
  for i in `find . -name "Kconfig*"`; do 
    mkdir -p $DEST/usr/src/linux-$KVER/`echo $i | sed 's|/Kconfig.*||'`
    cp $i $DEST/usr/src/linux-$KVER/$i
  done
  # fix build and source link in /lib/modules/XXX/
  cd $DEST/lib/modules/$KVEREXTRA-live/
  rm -f build && ln -s /usr/src/linux-$KVER build
  rm -f source && ln -s /usr/src/linux-$KVER source
}