verify_digest(){	# $0 method file string
  case "$1" in
  *)
    DIGEST=`echo "$1" | tr a-z A-Z`
    [ "$DIGEST($2)= $3" = "`openssl $1 $2`" ]
    ;;
  esac
}
verify_signature(){	# $0 url|id ... sig
  while [ "$1" != "" ]; do
    case "$1" in
    0x*)
      gpg --keyserver pgp.nic.ad.jp --recv-keys "$1" || return $?
      ;;
    http:*|ftp:*)
      curl "$1" | gpg --import || return $?
      ;;
    *)
      gpg --verify "$1"
      return $?
    esac
    shift
  done
}
error_out(){	# $0 message ...
  echo "$@" 1>&2
  exit 1
}

wget -N --no-check-certificate https://fedorahosted.org/xmlto/export/1/xmlto-0.0.21.tar.bz2
wget -N --no-check-certificate https://fedorahosted.org/xmlto/export/1/xmlto-0.0.21.tar.bz2.sig

verify_signature 0xE4226034 xmlto-0.0.21.tar.bz2.sig || error_out "$0: stopped at line $LINENO"

tar xvjf xmlto-0.0.21.tar.bz2

wget -N http://downloads.sourceforge.net/docbook/docbook-xsl-1.74.0.tar.bz2
tar xvjf docbook-xsl-1.74.0.tar.bz2

wget -N http://www.oasis-open.org/docbook/xml/4.2/docbook-xml-4.2.zip
[ ! -d docbook-xml-4.2 ] && mkdir docbook-xml-4.2
(cd docbook-xml-4.2 &&
unzip ../docbook-xml-4.2.zip
)

(cd xmlto-0.0.21 &&
patch -p0 -b -z.org < ../xmlto-0.0.21-sakuya.patch
)