#!/bin/sh
# small helper to extract information form *.ent files

BASEDIR="$(readlink -f "$(dirname $0)")"
INFO="$(readlink -f "${BASEDIR}/current/apt-vendor.ent")"

if [ -z "$INFO" ] || [ ! -e "$INFO" ]; then
	echo >&2 'The current vendor is not valid or not chosen by the buildsystem yet.'
	exit 1
fi

getrawfield() {
	grep --max-count=1 "^<!ENTITY $1 \"" "${2:-$INFO}" | cut -d'"' -f 2
}

getfield() {
	local FIELD="$(getrawfield "$@")"
	FIELD="${FIELD#*>}"
	echo "${FIELD%<*}"
}

case "$1" in
debian-stable-codename)
	getrawfield 'stable-codename' "${BASEDIR}/../doc/apt-verbatim.ent"
	;;
tanglu-codename)
	getrawfield 'tanglu-codename' "${BASEDIR}/../doc/apt-verbatim.ent"
	;;
ubuntu-codename)
	getrawfield 'ubuntu-codename' "${BASEDIR}/../doc/apt-verbatim.ent"
	;;
keyring-package|keyring-filename|keyring-master-filename|keyring-removed-filename|keyring-uri|current-distro-codename)
	getfield "$1"
	;;
*)
	echo >&2 "Unknown data field $1 requested"
	exit 2
	;;
esac