#!/bin/bash

############################################################################
#
# Script for generating a kernel source tree with the SCST patches applied.
#
# Copyright (C) 2010 Bart Van Assche <bvanassche@acm.org>
#
# This program 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, version 2
# of the License.
#
# This program 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.
#
############################################################################


########################
# Function definitions #
########################

source $(dirname $0)/kernel-functions

function usage {
  echo "Usage: $0 <kernel version>"
}


#########################
# Argument verification #
#########################

set -e

if [ "$1" = "" ]; then
  echo "Error: missing kernel version argument."
  exit 1
fi


##########################
# Kernel tree generation #
##########################

scriptname="$0"
if [ "${scriptname#/}" = "${scriptname}" ]; then
  scriptname="$PWD/$scriptname"
fi
target="linux-$1"
kernel_version="$(kernel_version "$1")"
patchlevel="$(patchlevel "$1")"

download_kernel "$1" || exit $?

extract_kernel_tree "$1" || exit $?

cd "${target}" || exit $?

list-source-files "$(dirname "$(dirname "$scriptname")")" \
| grep -- "-${kernel_version}.*.patch$" \
| grep -v /in-tree/ \
| while read p
  do
    if [ "${p/readahead-2.6.32.below11.patch//}" = "$p" \
         -o "${patchlevel:-0}" -lt 11 ]
    then
      echo "==== $p"
      patch -p1 <$p
    fi
  done