close server if parsing of header field failed

[apt.git] / vendor / getinfo

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

BASEDIR="$(readlink -f "$(dirname $0)")"
INFO="$(readlink -f "${BASEDIR}/current/apt-vendor.ent")"
VERBATIM="${BASEDIR}/../doc/apt-verbatim.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() {
	awk "/<!ENTITY $1/ {f=NR} f && NR-1==f { print; exit 0 }" RS='"' "${2:-$INFO}"
}

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

case "$1" in
debian-stable-codename|debian-oldstable-codename|debian-testing-codename|ubuntu-codename)
	getrawfield "$1" "$VERBATIM"
	;;
keyring-package|keyring-filename|keyring-master-filename|keyring-removed-filename|keyring-uri|current-codename)
	exec $0 'vendor' "$@"
	;;
vendor)
	getfield "$2"
	;;
verbatim)
	getfield "$2" "$VERBATIM"
	;;
*)
	echo >&2 "Unknown data field $1 requested"
	exit 2
	;;
esac