#! /bin/sh

PREFIX=
if [ "$1" = --prefix ]; then
	PREFIX="$2-"
	shift 2
fi

if [ $# -lt 2 ]; then
	echo "Usage: $0 [--prefix PREFIX] OLD-TREE STRING" >&2
	exit 1
fi

if ! [ -d debian/po-new ]; then
	cp -a debian/po debian/po-new
fi

for x in $1/*.po; do
	base=$(basename $x)
	base="${base#$PREFIX}"
	[ -e "debian/po-new/$base" ] || continue
	msgconv -t UTF-8 $x | \
		msgattrib --translated - | \
		msggrep -K -e "$2" - | \
		msgconv -t $(po-charset debian/po-new/$base) - | \
		msgcat --use-first debian/po-new/$base - | \
		sponge debian/po-new/$base
done

exit 0