#!/bin/sh
#
#  If the pygrub flag is set, this script will install the necessary
# packages to boot the VM from the dom0 via pygrub. This script installs
# the kernel and modules and generates a grub menu.lst in the newly
# created maschine.
#
# Dmitry Nedospasov
# --
# http://nedos.net

prefix=$1

#
#  Source our common functions
#

if [ -e /usr/lib/xen-tools/common.sh ]; then
    . /usr/lib/xen-tools/common.sh
else
    . ./hooks/common.sh
fi

if [ "${pygrub}" ]; then
#
# Log our start
#

logMessage Script $0 starting

#
# The type of kernel that we will be installing
#
# linux_kernel_type="desktop"
# 
linux_kernel_type="server"

linux_kernel_package="linux-image-${linux_kernel_type}"

logMessage "Installing the ${linux_kernel_package} kernel image"
if chroot ${prefix} /usr/bin/apt-cache show ${linux_kernel_package} >/dev/null 2>/dev/null; then
    logMessage "Package '${linux_kernel_package}' is available - installing"
    installDebianPackage ${prefix} initramfs-tools
    installDebianPackage ${prefix} ${linux_kernel_package}

# Force initrd if none exists
echo ${prefix}/boot/initrd* | grep -q 2\\.6
if [ $? -ne 0 ]; then
    chroot ${prefix} update-initramfs -c -k `ls -1 ${prefix}/lib/modules/ | head -n 1`
fi

# Generate grub menu.lst
DOMU_KERNEL=$(basename $(ls -1 ${prefix}/boot/vmlinuz* | tail -n 1))
DOMU_RAMDISK=$(basename $(ls -1 ${prefix}/boot/initrd*|tail -n 1))
DOMU_ISSUE=$(head -n 1 ${prefix}/etc/issue | awk -F '\' '{ print $1 }' | sed 's/[ \t]*$//')

mkdir -p ${prefix}/boot/grub
cat << E_O_MENU > ${prefix}/boot/grub/menu.lst
default         0
timeout         2

title           $DOMU_ISSUE
root            (hd0,0)
kernel          /boot/$DOMU_KERNEL root=/dev/xvda2 ro elevator=noop
initrd          /boot/$DOMU_RAMDISK

title           $DOMU_ISSUE (Single-User)
root            (hd0,0)
kernel          /boot/$DOMU_KERNEL root=/dev/xvda2 ro single elevator=noop
initrd          /boot/$DOMU_RAMDISK

E_O_MENU

else
    logMessage "Package '${linux_kernel_package}' is not available"
fi

#
#  Install the module-init-tools package.
#

installDebianPackage ${prefix} module-init-tools

else
    logMessage pygrub not set, skipping kernel install
fi # if pygrub

#
#  Log our finish
#

logMessage Script $0 finished