#!/bin/sh -x

# usage: xen-clone bk_repository dest_dir orig_linux_dir
# 
# this script contains some CL site specific details, but can easily be adapted
#

# test which site we're on
[ -d /usr/groups/xeno/ -a -d /usr/groups/srgboot ] && SITE=UCCL

case "$SITE" in
UCCL)
	BK_REP=${1:-/usr/groups/xeno/BK/xeno.bk}
	# BK_REP=${1:-xeno-master/xeno.bk}
	LINUX_DIR=${3:-/usr/groups/xeno/archive/}
	;;
*)
	BK_REP=${1:-bk://xen.bkbits.net/xeno-1.0.bk}
	# BK_REP=${1:-ssh://xen@xen.bkbits.net/xeno-1.0.bk}
	LINUX_DIR=${3:-..}
;;
esac

DEST_DIR=${2:-xeno-clone}
DEST_BK_REP=`basename ${BK_REP}`

echo usage: xen-clone bk_repository dest_dir orig_linux_dir
echo Source BK Repository : ${BK_REP}
echo Destination Dir/Repository : ${DEST_DIR}/${DEST_BK_REP}
echo Pristine Linux Source directory : ${LINUX_DIR}

mkdir -p ${DEST_DIR}
cd ${DEST_DIR}
TOP=`/bin/pwd`

# site-specific set up of installation directories
case "$SITE" in
UCCL)
	PATH=$PATH:/usr/groups/xeno/build_tools/bin
	mkdir -p install/boot
	cd install/boot
	ln -sf ../../../xeno-roots/roots .
	ln -sf ../../../xeno-roots/usr .
	ln -sf ../lib .
	ln -sf ../bin .
	ln -sf /usr/groups/srgboot/${USER}/xenoboot.sh .
	ln -sf `pwd` /usr/groups/srgboot/${USER}/${DEST_DIR}
	cd ../..
	;;
esac

# clone the master repository (now checked-out by default)
if [ ! -d ${DEST_BK_REP} ] 
then 
bk clone ${BK_REP} ${DEST_BK_REP}
else
cd ${DEST_BK_REP}
bk pull
cd ${TOP}
fi

# identify this version of linux
LINUX_VER=`/bin/ls -ld ${DEST_BK_REP}/xenolinux-sparse | sed -e 's!^.*xenolinux-\([0-9.]\+\)-sparse!\1!'`

# copy in the master Linux tree for this kernel
if [ ! -d linux-${LINUX_VER} ]
then
tar -zxf ${LINUX_DIR}/linux-${LINUX_VER}.tar.gz || tar -zxf ${LINUX_DIR}/linux-${LINUX_VER}.tgz || cp -a ${LINUX_DIR}/linux-${LINUX_VER} . ||  wget ftp://ftp.kernel.org/pub/linux/kernel/v2.4/linux-${LINUX_VER}.tar.gz -O- | tar -zxf - || exit -1
fi

# build and install Xen and tools
cd ${DEST_BK_REP}
make install

# Turn linux into xenolinux then build it
cd xenolinux-${LINUX_VER}-sparse
./mkbuildtree ../../linux-${LINUX_VER}
cd ../..
mv linux-${LINUX_VER} xenolinux-${LINUX_VER}
cd xenolinux-${LINUX_VER}
export ARCH=xeno
export INSTALL_MOD_PATH=${TOP}/install
make oldconfig
make dep
make bzImage
make install
make modules
make modules_install
cd ..