#! /bin/sh -e

# grub-mkconfig helper script.
# Copyright (C) 2006,2007,2008,2009,2010  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/>.

transform="s,x,x,"

prefix=/usr
exec_prefix=${prefix}
libdir=${exec_prefix}/lib
grub_prefix=`echo /boot/grub | sed ${transform}`
locale_dir=`echo /boot/grub/locale | sed ${transform}`
grub_lang=`echo $LANG | cut -d _ -f 1`

. ${libdir}/grub/grub-mkconfig_lib

# Do this as early as possible, since other commands might depend on it.
# (e.g. the `loadfont' command might need lvm or raid modules)
for i in ${GRUB_PRELOAD_MODULES} ; do
  echo "insmod $i"
done

if [ "x${GRUB_DEFAULT}" = "x" ] ; then GRUB_DEFAULT=0 ; fi
if [ "x${GRUB_DEFAULT}" = "xsaved" ] ; then GRUB_DEFAULT='${saved_entry}' ; fi
if [ "x${GRUB_TIMEOUT}" = "x" ] ; then GRUB_TIMEOUT=5 ; fi
if [ "x${GRUB_GFXMODE}" = "x" ] ; then GRUB_GFXMODE=640x480 ; fi

cat << EOF
if [ -s \$prefix/grubenv ]; then
  load_env
fi
set default="${GRUB_DEFAULT}"
if [ \${prev_saved_entry} ]; then
  set saved_entry=\${prev_saved_entry}
  save_env saved_entry
  set prev_saved_entry=
  save_env prev_saved_entry
  set boot_once=true
fi

function savedefault {
  if [ -z \${boot_once} ]; then
    saved_entry=\${chosen}
    save_env saved_entry
  fi
}

function recordfail {
  set recordfail=1
  if [ -n \${have_grubenv} ]; then if [ -z \${boot_once} ]; then save_env recordfail; fi; fi
}
EOF

case ${GRUB_TERMINAL_INPUT}:${GRUB_TERMINAL_OUTPUT} in
  serial:* | *:serial)
    if ! test -e ${grub_prefix}/serial.mod ; then
      echo "Serial terminal not available on this platform." >&2 ; exit 1
    fi

    if [ "x${GRUB_SERIAL_COMMAND}" = "x" ] ; then
      grub_warn "Requested serial terminal but GRUB_SERIAL_COMMAND is unspecified. Default parameters will be used."
      GRUB_SERIAL_COMMAND=serial
    fi
    echo "${GRUB_SERIAL_COMMAND}"
  ;;
esac

case x${GRUB_TERMINAL_INPUT} in
  x)
    # Just use the native terminal
  ;;
  x*)
    cat << EOF
if terminal_input ${GRUB_TERMINAL_INPUT} ; then true ; else
  # For backward compatibility with versions of terminal.mod that don't
  # understand terminal_input
  terminal ${GRUB_TERMINAL_INPUT}
fi
EOF
  ;;
esac

case x${GRUB_TERMINAL_OUTPUT} in
 xgfxterm)
    # Make the font accessible
    prepare_grub_to_access_device `${grub_probe} --target=device ${GRUB_FONT_PATH}`

    cat << EOF
if loadfont `make_system_path_relative_to_its_root ${GRUB_FONT_PATH}` ; then
  set gfxmode=${GRUB_GFXMODE}
  insmod gfxterm
  insmod ${GRUB_VIDEO_BACKEND}
  if terminal_output gfxterm ; then true ; else
    # For backward compatibility with versions of terminal.mod that don't
    # understand terminal_output
    terminal gfxterm
  fi
EOF
if [ x$GRUB_THEME != x ] && [ -f $GRUB_THEME ] \
	&& is_path_readable_by_grub $GRUB_THEME; then
    echo "Found theme: $GRUB_THEME" >&2
    prepare_grub_to_access_device `${grub_probe} --target=device $GRUB_THEME` | sed -e "s/^/  /"
    cat << EOF
  insmod gfxmenu
  set theme=(\$root)`make_system_path_relative_to_its_root $GRUB_THEME`
  set menuviewer=gfxmenu
EOF
fi
    cat << EOF
fi
EOF
  ;;
  x)
    # Just use the native terminal
  ;;
  x*)
    cat << EOF
if terminal_output ${GRUB_TERMINAL_OUTPUT} ; then true ; else
  # For backward compatibility with versions of terminal.mod that don't
  # understand terminal_output
  terminal ${GRUB_TERMINAL_OUTPUT}
fi
EOF
  ;;
esac

# Gettext variables and module
if [ "x${LANG}" != "xC" ] ; then
    prepare_grub_to_access_device $(${grub_probe} --target=device ${locale_dir})
  cat << EOF
set locale_dir=(\$root)$(make_system_path_relative_to_its_root ${locale_dir})
set lang=${grub_lang}
insmod gettext
EOF
fi

cat << EOF
if [ \${recordfail} = 1 ]; then
  set timeout=-1
else
  set timeout=${GRUB_TIMEOUT}
fi
EOF

# Play an initial tune
if [ "x${GRUB_INIT_TUNE}" != "x" ] ; then
  cat << EOF
insmod play
play ${GRUB_INIT_TUNE}
EOF
fi