#!/bin/sh

# Make GRUB rescue image
# Copyright (C) 1999,2000,2001,2002,2003,2004,2005,2006,2007,2008,2009,2010,2011,2012  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.

compression=auto
format=
source=

# Usage: usage
# Print the usage.
usage () {
    formats="i386-coreboot i386-multiboot i386-pc i386-pc-pxe i386-efi i386-ieee1275 i386-qemu x86_64-efi mipsel-yeeloong-flash mipsel-fuloong2f-flash mipsel-loongson-elf powerpc-ieee1275 sparc64-ieee1275-raw sparc64-ieee1275-aout ia64-efi mips-arc mipsel-qemu_mips-elf mips-qemu_mips-flash  mipsel-qemu_mips-flash  mips-qemu_mips-elf"
    gettext_printf "Usage: %s [OPTION] SOURCE...\n" "$self"
    gettext "Generate a standalone image (containing all modules) in the selected format"
    echo
    print_option_help "-h, --help" "$(gettext "print this message and exit")"
    print_option_help "-o, --output=$(gettext FILE)" "$(gettext "save output in FILE [required]")"
    print_option_help "-O, --format=$(gettext "FORMAT")" "$(gettext "generate an image in FORMAT")"; echo
    print_option_help "" "$(gettext "available formats:") $formats"
    echo
    print_option_help "-C, --compression=(xz|none|auto)" "$(gettext "choose the compression to use for core image")"
    grub_print_install_files_help
    echo
    gettext "Report bugs to <bug-grub@gnu.org>."; echo
}

# Check the arguments.
while test $# -gt 0
do
    grub_process_install_options "$@"
    case "$grub_process_install_options_consumed" in
	1) shift; continue;;
	2) shift; shift; continue;;
    esac

    option=$1
    shift

    case "$option" in
    -h | --help)
	usage
	exit 0 ;;

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

    --compression | -C)
	compression=`argument $option "$@"`; shift ;;
    --compression=*)
	compression=`echo "${option}" | sed 's/--compression=//'` ;;

    --format | -O)
	format=`argument $option "$@"`; shift ;;
    --format=*)
	format=`echo "${option}" | sed 's/--format=//'` ;;

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

if [ "x${output_image}" = x ] ; then
  gettext "output file must be specified" >&2
  echo >&2
  usage
  exit 1
fi

if [ "x${format}" = x ] ; then
  gettext "Target format not specified (use the -O option)." >&2
  echo >&2
  exit 1
fi

if [ "x$source_directory" = x ] ; then
    cpu="`echo $format | awk -F - '{ print $1; }'`"
    platform="`echo $format | awk -F - '{ print $2; }'`"
    case "$platform" in
	yeeloong | fuloong | fuloong2f | fuloong2e)
	    platform=loongson ;;
    esac
    case "$cpu-$platform" in
	mips-loongson)
	    cpu=mipsel ;;
    esac
    source_directory="${libdir}/@PACKAGE@/$cpu-$platform"
fi

. "${source_directory}"/modinfo.sh

set $grub_mkimage dummy
if test -f "$1"; then
    :
else
    echo "$1: Not found." 1>&2
    exit 1
fi

memdisk_dir="`mktemp -d "${TMPDIR:-/tmp}/tmp.XXXXXXXXXX"`" || exit 1
grub_install_files "${source_directory}" "${memdisk_dir}"/boot/grub "${grub_modinfo_target_cpu}-${grub_modinfo_platform}"

memdisk_img=`mktemp "${TMPDIR:-/tmp}/tmp.XXXXXXXXXX"` || exit 1

(cd "${memdisk_dir}"; tar -cf - * $source) > "${memdisk_img}"
rm -rf "${memdisk_dir}"
"$grub_mkimage" -O "${format}" -C "$compression" -d "${source_directory}" -m "${memdisk_img}" -o "$output_image" --prefix='(memdisk)/boot/grub' memdisk tar $grub_decompression_module $modules
rm -rf "${memdisk_img}"

exit 0