#!/bin/sh

case $(basename $0) in
	use.sh)
		TARGET="package.use"
	;;
	mask.sh)
		TARGET="package.mask"
	;;
	unmask.sh)
		TARGET="package.unmask"
	;;
esac

GREPLINE=$(fgrep -n "$1" /etc/portage/${TARGET})
if [ -n "$GREPLINE" ]; then
	LNUM=$(echo $GREPLINE | awk -F : '{print $1}')
	echo -en "line $LNUM in ${TARGET} already contains $1.\nDo you want to edit the file? [y|n]"
	while read i
	do
		case $i in
			Y|y)
				case "${EDITOR}x" in
					"x")
						echo "No \$EDITOR variable set. Using vi."
						vi /etc/portage/${TARGET}
					;;
					"*vi*x")
						$EDITOR  +${LNUM} /etc/portage/${TARGET}
					;;
					*)
						$EDITOR /etc/portage/${TARGET}
					;;
				esac
				break
			;;
			N|n) break
			;;
			*) echo -n "[y|n]"
				continue
			;;
		esac
	done
else
	if [ -w /etc/portage/${TARGET} ]; then
		echo "putting $@ >> /etc/portage/${TARGET}"
		echo $@ >> /etc/portage/${TARGET}
	else
		echo "${TARGET} does not exist or is not writable for this user."
		exit 1
	fi
fi
echo "done."
exit 0