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

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

if [ "x${GRUB_DISTRIBUTOR}" = "x" ] ; then
  OS="NetBSD"
else
  OS="${GRUB_DISTRIBUTOR} NetBSD"
fi

netbsd_load_fs_module ()
{
  loader="$1"	# "knetbsd" or "multiboot"
  kernel="$2"	# absolute path to the kernel file

  case $(zcat -f "${kernel}" | file -bL - | cut -d , -f 2 | tr -d ' ') in
    Intel80386)
      karch="i386"
      ;;
    x86-64)
      karch="amd64"
      ;;
    *)
      return
      ;;
  esac

  case $(${grub_probe} --target=fs -d ${GRUB_DEVICE}) in
    ext2)
      kmod="ext2fs"
      ;;
    fat)
      kmod="msdosfs"
      ;;
    ntfs)
      kmod="ntfs"
      ;;
    ufs*)
      kmod="ffs"
      ;;
    *)
      return
      ;;
  esac

  kversion=$(zcat -f "${kernel}" | strings | sed -n -e '/^@(#)NetBSD/ { s/^@(#)NetBSD \([0-9\.]*\) .*$/\1/g ; p ; q ; }')
  kmodule="/stand/${karch}/${kversion}/modules/${kmod}/${kmod}.kmod"

  if test -z "$karch" -o -z "$kversion" -o ! -f "${kmodule}"; then
    return
  fi

  kmodule_rel=$(make_system_path_relative_to_its_root "$kmodule") || return
  prepare_grub_to_access_device $(${grub_probe} -t device "${kmodule}") | sed -e 's,^,	,'
  case "${loader}" in
    knetbsd)
      printf "\tknetbsd_module_elf %s\n" "${kmodule_rel}"
      ;;
    multiboot)
      printf "\tmodule %s\n" "${kmodule_rel}"
      ;;
  esac
}

title_correction_code=

netbsd_entry ()
{
  loader="$1"	# "knetbsd" or "multiboot"
  kernel="$2"	# absolute path to the kernel file
  type="$3"
  args="$4"	# extra arguments appended to loader command

  kroot_device="$(echo ${GRUB_DEVICE} | sed -e 's,^/dev/r,,')"

  if [ -z "$boot_device_id" ]; then
      boot_device_id="$(grub_get_device_id "${GRUB_DEVICE}")"
  fi

  if [ x$type != xsimple ] ; then
      if [ x$type = xrecovery ] ; then
	  title="$(gettext_printf "%s, with kernel %s (via %s, recovery mode)" "${OS}" "$(echo ${kernel} | sed -e 's,^.*/,,')" "${loader}")"
      else
	  title="$(gettext_printf "%s, with kernel %s (via %s)" "${OS}" "$(echo ${kernel} | sed -e 's,^.*/,,')" "${loader}")"
      fi
      replacement_title="$(echo "Advanced options for ${OS}" | sed 's,>,>>,g')>$(echo "$title" | sed 's,>,>>,g')"
      if [ x"$title" = 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" "netbsd-advanced-$boot_device_id>netbsd-${loader}-$kernel-$type-$boot_device_id")"
      fi

      echo "menuentry '$(echo "$title" | grub_quote)' \$menuentry_id_option 'netbsd-${loader}-$kernel-$type-$boot_device_id' {"  | sed "s/^/$submenu_indentation/"
  else
      echo "menuentry '$(echo "$OS" | grub_quote)' \$menuentry_id_option 'netbsd-${loader}-simple-$boot_device_id' {"  | sed "s/^/$submenu_indentation/"
  fi

  printf "%s\n" "${prepare_boot_cache}" | sed "s/^/$submenu_indentation/"
  case "${loader}" in
    knetbsd)
      printf "\tknetbsd %s -r %s %s\n" \
        "${kernel}" "${kroot_device}" "${GRUB_CMDLINE_NETBSD} ${args}" | sed "s/^/$submenu_indentation/"
      ;;
    multiboot)
      printf "\tmultiboot %s %s root=%s %s\n" \
        "${kernel}" "${kernel}" "${kroot_device}" "${GRUB_CMDLINE_NETBSD} ${args}" | sed "s/^/$submenu_indentation/"
      ;;
  esac

  netbsd_load_fs_module "${loader}" "${kernel}"

  printf "}\n" | sed "s/^/$submenu_indentation/"
}

prepare_boot_cache="$(prepare_grub_to_access_device ${GRUB_DEVICE} | sed -e 's,^,	,')"
boot_device_id=

# We look for NetBSD kernels in / but not in subdirectories.  We simply
# pick all statically linked ELF executable files (or links) in / with a
# name that starts with `netbsd'.
pattern="^ELF[^,]*executable.*statically linked"
# 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 k in $(ls -t /netbsd*) ; do
  if ! grub_file_is_not_garbage "$k" ; then
    continue
  fi
  if ! (zcat -f "$k" | file -bL - | grep -q "${pattern}") 2>/dev/null ; then
    continue
  fi

  gettext_printf "Found NetBSD kernel: %s\n" "$k" >&2

  if [ "x$is_first_entry" = xtrue ]; then
      netbsd_entry "knetbsd"   "$k" simple "${GRUB_CMDLINE_NETBSD_DEFAULT}"
    submenu_indentation="\t"
    
    if [ -z "$boot_device_id" ]; then
	boot_device_id="$(grub_get_device_id "${GRUB_DEVICE}")"
    fi
    # TRANSLATORS: %s is replaced with an OS name
    echo "submenu '$(gettext_printf "Advanced options for %s" "${OS}" | grub_quote)' \$menuentry_id_option 'netbsd-advanced-$boot_device_id' {"
  fi

  netbsd_entry "knetbsd"   "$k" advanced "${GRUB_CMDLINE_NETBSD_DEFAULT}"
  netbsd_entry "multiboot" "$k" advanced "${GRUB_CMDLINE_NETBSD_DEFAULT}"
  if [ "x${GRUB_DISABLE_RECOVERY}" != "xtrue" ]; then
    netbsd_entry "knetbsd"   "$k" recovery "-s"
    netbsd_entry "multiboot" "$k" recovery "-s"
  fi
  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"