#! /bin/sh
set -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/>.

prefix="@prefix@"
exec_prefix="@exec_prefix@"
datarootdir="@datarootdir@"

export TEXTDOMAIN=@PACKAGE@
export TEXTDOMAINDIR="@localedir@"

. "@datadir@/@PACKAGE@/grub-mkconfig_lib"

CLASS="--class gnu --class os"

if [ "x${GRUB_DISTRIBUTOR}" = "x" ] ; then
  OS=GNU
else
  OS="${GRUB_DISTRIBUTOR} GNU/Hurd"
  CLASS="--class $(echo ${GRUB_DISTRIBUTOR} | tr 'A-Z' 'a-z' | cut -d' ' -f1) ${CLASS}"
fi

at_least_one=false
all_of_them=true

# FIXME: add l4 here?
kernel=
for i in /boot/gnumach* ; do
  if test -e $i ; then
    basename=`basename $i`
    dirname=`dirname $i`
    rel_dirname=`make_system_path_relative_to_its_root $dirname`
    gettext_printf "Found GNU Mach: %s" "$i" >&2
    echo >&2
    kernels="${kernels} ${rel_dirname}/${basename}"
    at_least_one=true
  fi
done

# FIXME: This works for ext2.  For other filesystems we might need special-casing
case "${GRUB_FS}" in
  *fs)	hurd_fs="${GRUB_FS}" ;;
  *)	hurd_fs="${GRUB_FS}fs" ;;
esac

for i in /hurd/${hurd_fs}.static /hurd/exec ; do
  if test -e "$i" ; then
    gettext_printf "Found Hurd module: %s" "$i" >&2
    echo >&2
    at_least_one=true
  else
    all_of_them=false
  fi
done

if ${at_least_one} ; then : ; else
  # no hurd here, aborting silently
  exit 0
fi

if ${all_of_them} && test -e /lib/ld.so.1 ; then : ; else
  gettext "Some Hurd stuff found, but not enough to boot." >&2
  echo >&2
  exit 1
fi

title_correction_code=

hurd_entry () {
  kernel="$1"
  type="$2"
  kernel_base="`basename "${kernel}"`"

  if [ x$type != xsimple ] ; then
      if [ x$type = xrecovery ] ; then
	  title="$(gettext_printf "%s, with Hurd %s (recovery mode)" "${OS}" "${kernel_base}")"
	  oldtitle="$OS using $kernel_base (recovery mode)"
      else
	  title="$(gettext_printf "%s, with Hurd %s" "${OS}" "${kernel_base}")"
	  oldtitle="$OS using $kernel_base"
      fi
      if [ x"$oldtitle" = x"$GRUB_ACTUAL_DEFAULT" ]; then
	  quoted="$(echo "$GRUB_ACTUAL_DEFAULT" | grub_quote)"
	  title_correction_code="${title_correction_code}if [ \"x\$default\" = '$quoted' ]; then default='$(echo "$replacement_title" | grub_quote)'; fi;"
	  grub_warn "$(gettext_printf "Please don't use old title \`%s' for GRUB_DEFAULT, use \`%s' (for versions before 2.00) or \`%s' (for 2.00 or later)" "$GRUB_ACTUAL_DEFAULT" "$replacement_title" "gnuhurd-advanced-$boot_device_id>'gnuhurd-$kernel-$type-$(grub_get_device_id "${GRUB_DEVICE_BOOT}")'")"
      fi
      sed "s/^/$submenu_indentation/" << EOF
menuentry '$(echo "$title" | grub_quote)' ${CLASS} \$menuentry_id_option 'gnuhurd-$kernel-$type-$(grub_get_device_id "${GRUB_DEVICE_BOOT}")' {
EOF
  else
      sed "s/^/$submenu_indentation/" << EOF
menuentry '$(echo "$OS" | grub_quote)' ${CLASS} \$menuentry_id_option 'gnuhurd-simple-$(grub_get_device_id "${GRUB_DEVICE_BOOT}")' {
EOF
  fi

  prepare_grub_to_access_device "${GRUB_DEVICE_BOOT}" | grub_add_tab|sed "s/^/$submenu_indentation/"
  message="$(gettext_printf "Loading GNU Mach ...")"

  if [ x$type = xrecovery ] ; then
      opts="-s"
  else
      opts=
  fi
  sed "s/^/$submenu_indentation/" << EOF
	echo		'$(echo "$message" | grub_quote)'
	multiboot	${kernel} root=device:${GRUB_DEVICE#/dev/} $opts ${GRUB_CMDLINE_GNUMACH}
EOF

  if [ x$type != xrecovery ] ; then
      save_default_entry | grub_add_tab| sed "s/^/$submenu_indentation/"
  fi
  prepare_grub_to_access_device "${GRUB_DEVICE}" | grub_add_tab| sed "s/^/$submenu_indentation/"
  message="$(gettext_printf "Loading the Hurd ...")"
  if [ x$type = xrecovery ] ; then
      opts=
  else
      opts="--readonly"
  fi

  sed "s/^/$submenu_indentation/" << EOF
	echo		'$(echo "$message" | grub_quote)'
	module		/hurd/${hurd_fs}.static ${hurd_fs} $opts \\
			--multiboot-command-line='\${kernel-command-line}' \\
			--host-priv-port='\${host-port}' \\
			--device-master-port='\${device-port}' \\
			--exec-server-task='\${exec-task}' -T typed '\${root}' \\
			'\$(task-create)' '\$(task-resume)'
	module		/lib/ld.so.1 exec /hurd/exec '\$(exec-task=task-create)'
}
EOF

}

title_correction_code=

# Extra indentation to add to menu entries in a submenu. We're not in a submenu
# yet, so it's empty. In a submenu it will be equal to '\t' (one tab).
submenu_indentation=""
is_first_entry=true

for kernel in ${kernels}
do

  if [ "x$is_first_entry" = xtrue ]; then
      hurd_entry "$kernel" simple
      submenu_indentation="$grub_tab"
    
      # TRANSLATORS: %s is replaced with an OS name
      echo "submenu '$(gettext_printf "Advanced options for %s" "${OS}" | grub_quote)' \$menuentry_id_option 'gnuhurd-advanced-$(grub_get_device_id "${GRUB_DEVICE_BOOT}")' {"
  fi

  hurd_entry "$kernel" advanced
  hurd_entry "$kernel" recovery
  is_first_entry=false
done

# If at least one kernel was found, then we need to
# add a closing '}' for the submenu command.
if [ x"$is_first_entry" != xtrue ]; then
  echo '}'
fi

echo "$title_correction_code"