#! /bin/sh
set -e

# Make GRUB rescue image
# Copyright (C) 1999,2000,2001,2002,2003,2004,2005,2006,2007,2008  Free Software Foundation, Inc.
#
# GRUB 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, either version 3 of the License, or
# (at your option) any later version.
#
# GRUB 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.
#
# You should have received a copy of the GNU General Public License
# along with GRUB.  If not, see <http://www.gnu.org/licenses/>.

# Initialize some variables.
transform="@program_transform_name@"

prefix=@prefix@
exec_prefix=@exec_prefix@
bindir=@bindir@
libdir=@libdir@
PACKAGE_NAME=@PACKAGE_NAME@
PACKAGE_TARNAME=@PACKAGE_TARNAME@
PACKAGE_VERSION=@PACKAGE_VERSION@
target_cpu=@target_cpu@
platform=@platform@
pkglibdir=${libdir}/`echo ${PACKAGE_TARNAME}/${target_cpu}-${platform} | sed ${transform}`

self=`basename $0`

grub_mkimage=${bindir}/`echo grub-mkimage | sed ${transform}`

# Usage: usage
# Print the usage.
usage () {
    gettext_printf "Usage: %s [OPTION] SOURCE...\n" "$self"
    gettext "Make GRUB rescue image."; echo
    echo
    printf "  -h, --help              %s\n" "$(gettext "print this message and exit")"
    printf "  -v, --version           %s\n" "$(gettext "print the version information and exit")"
    printf "  --modules=%-14s%s\n" "$(gettext "MODULES")" "$(gettext "pre-load specified modules MODULES")"
    printf "  --grub-mkimage=%-9s%s\n" "$(gettext "FILE")" "$(gettext "use FILE as grub-mkimage")"
    echo
    gettext_printf "%s generates a bootable rescue image with specified source files, source directories, or mkisofs options listed by: %s\n" "genisoimage -help" "$self"
    echo
    gettext "Report bugs to <bug-grub@gnu.org>."; echo
}

argument () {
  opt=$1
  shift

  if test $# -eq 0; then
      gettext_printf "%s: option requires an argument -- '%s'\n" "$0" "$opt" 1>&2
      exit 1
  fi
  echo $1
}

input_dir=${pkglibdir}

source=
output_image=

# Check the arguments.
while test $# -gt 0
do
    option=$1
    shift

    case "$option" in
    -h | --help)
	usage
	exit 0 ;;
    -v | --version)
	echo "$self (${PACKAGE_NAME}) ${PACKAGE_VERSION}"
	exit 0 ;;

    --modules)
	modules=`argument $option "$@"`; shift ;;
    --modules=*)
	modules=`echo "$option" | sed 's/--modules=//'` ;;

    --override-directory)
	input_dir=`argument $option "$@"`; shift ;;
    --override-directory=*)
	input_dir=`echo "$option" | sed 's/--override-directory=//'` ;;

    --grub-mkimage)
	grub_mkimage=`argument $option "$@"`; shift ;;
    --grub-mkimage=*)
	grub_mkimage=`echo "$option" | sed 's/--grub-mkimage=//'` ;;

    -o | --output)
	output_image=`argument $option "$@"`; shift ;;
    --output=*)
	output_image=`echo "$option" | sed 's/--output=//'` ;;

    *)
	source="${source} ${option} $@"; break ;;
    esac
done

if test "x$output_image" = x; then
  usage
  exit 1
fi

if [ "x${modules}" = "x" ] ; then
  modules=`cd ${input_dir}/ && ls *.mod`
fi

map_file=`mktemp "${TMPDIR:-/tmp}/tmp.XXXXXXXXXX"` || exit 1
cat >${map_file} <<EOF
# EXTN          XLate   CREATOR   TYPE     Comment
grub.img        Raw     'UNIX'    'tbxi'   "bootstrap"
EOF

iso_dir=`mktemp -d "${TMPDIR:-/tmp}/tmp.XXXXXXXXXX"` || exit 1
boot_dir=${iso_dir}/boot/grub
mkdir ${iso_dir}/boot
mkdir ${boot_dir}
core_img=${boot_dir}/grub.img
${grub_mkimage} -O powerpc-ieee1275 -n -d ${input_dir}/ -o ${core_img} ${modules}
genisoimage -hfs -part -no-desktop -r -J -o ${output_image} \
 -map ${map_file} -hfs-bless ${boot_dir} -chrp-boot -sysid PPC \
 ${iso_dir} ${source}

rm -rf ${iso_dir}
rm -f ${map_file}

exit 0