#!/bin/bash -e
usage() {
cat <<EOF

  $0 -o=output.iso
  Copyright Adrian Gibanel Lopez
  Licensed under the GNU PUBLIC LICENSE 3.0

  CREATE CALL
  ===========

  Usage: $0 [-o=FILENAME]
  Example: $0 -o=myrescatux.iso

EOF

}
# Check the arguments.
for option in "$@"; do
  case "$option" in
    -h | --help)
      usage
      exit 0
    ;;
    -o=*)
      CUSTOM_ISO_FILENAME=`echo "$option" | sed 's/-o=//'`
    ;;
  esac
done

# Get the version number for this Super GRUB2 Disk release
source menus/version.cfg


BOOT_ISOS_DIRECTORY="boot-isos"
overlay=$(mktemp -d)
ISO_FILENAME="super_grub2_disk_hybrid_${sgrub_version}.iso"

if [[ "x$CUSTOM_ISO_FILENAME" != x ]] ; then
  ISO_FILENAME="${CUSTOM_ISO_FILENAME}"
fi

default_options="--output=${ISO_FILENAME} $overlay"
mkdir -p "$overlay/boot/grub/"
cp -r menus/* "$overlay/boot/grub/"
if [ -d ${BOOT_ISOS_DIRECTORY} ] ; then
  cp -r ${BOOT_ISOS_DIRECTORY} "$overlay/boot/"
fi

cp AUTHORS COPYING "$overlay/boot/grub/"

# Generate mo files and add them to overlay
for pofile in po/*.po; do
  basename=${pofile##*/}
  lang_code="${basename%.po}"
  info_cfg="menus/sgd_locale/${lang_code}_info.cfg"
  msgfmt "$pofile" --output-file="$overlay/boot/grub/sgd_locale/${lang_code}.mo"
  if ! [[ -f "$info_cfg" ]]; then
    echo "Thank you for providing a new translation for Super GRUB2 Disk!"
    echo "Before this translation can be used in Super GRUB2 Disk we need to know what"
    echo "to call it in our language selection menu."
    echo "We need to know the name of the language you've translated, in that language."
    echo "For example, for Spanish you would enter \"Español\" (without the quotes)."
    echo -n "Please enter the name of the language for $pofile: "
    read language_name
    cp info_cfg_header.cfg "$info_cfg"
    echo "lang_code='${lang_code}'" >> "$info_cfg"

    # This will fail if $language_name contains a single quote character.
    # TODO: Fix aforementioned problem by escaping quotes in $language_name.
    echo "language_name='${language_name}'" >> "$info_cfg"

    echo "A file, ${info_cfg}, was created with this information."
    echo "Thanks again for contributing a new translation!"
    echo; echo
  fi
done

# Find unifont font file to create grub font. This is needed for gfxterm in grub, which
# in turn is needed for displaying non-ASCII characters for non-English translations.
# This unifont finding code was copied from grub's configure.ac.
for ext in pcf pcf.gz bdf bdf.gz ttf ttf.gz; do
  for dir in . /usr/src /usr/share/fonts/X11/misc /usr/share/fonts/unifont; do
    if test -f "$dir/unifont.$ext"; then
      font_source="$dir/unifont.$ext"
      break 2
    fi
  done
done

if [[ -n "$font_source" ]]; then
  grub-mkfont "$font_source" --output="$overlay/boot/grub/unifont.pf2"
else
  echo "Error: Unifont not found. Unifont is needed for Super GRUB2 Disk" >&2
  echo "to properly display non-ASCII characters. Aborting without creating an iso." >&2
  exit 1
fi

grub-mkrescue $default_options
rm -r "$overlay"

md5sum ${ISO_FILENAME} > ${ISO_FILENAME}.md5
sha1sum ${ISO_FILENAME} > ${ISO_FILENAME}.sha1
sha256sum ${ISO_FILENAME} > ${ISO_FILENAME}.sha256