#!/bin/sh
set -e

CODENAME="$1"
if [ -z "$CODENAME" ]; then
	echo "usage: update_tasks CODENAME" >&2
	exit 1
fi

if [ ! -e /usr/share/tasksel/debian-tasks.desc ]; then
	echo "tasksel must be installed to update task lists" >&2
	exit 1
fi

update_full_list () {
	file=$1
	tasklist=$2

	grep '\*' $file > $file.new
	for i in $(cat $tasklist); do
		grep-aptavail -e -F Task "(^| )$i(,|$)" -s Package -n;
	done >> $file.new
	mv $file.new $file
}

update_essential_list () {
	file=$1
	tasklist=$2
	desktoptask=$3

	grep '\*' $file > $file.new
	for i in $(cat $tasklist); do
		if ( [ "$i" != gnome-dekstop ] &&
		     [ "$i" != kde-desktop ] &&
		     [ "$i" != xfce-desktop ] ) ||
		   [ "$i" = "$desktoptask" ]; then
			grep-dctrl -F Task -e "^$i$" /usr/share/tasksel/debian-tasks.desc |
			grep-dctrl -s Key -n -e '.*';
		fi
	done | sed -e 's? *??' | grep -v ^$ >> $file.new
	mv $file.new $file
}

update_essential_list tasks/task-essential-$CODENAME tasks/task.list gnome-desktop
update_essential_list tasks/task-essential-$CODENAME-kde tasks/task.list.kde kde-desktop
update_essential_list tasks/task-essential-$CODENAME-xfce tasks/task.list.xfce xfce-desktop

update_full_list tasks/task-full-$CODENAME tasks/task.list
update_full_list tasks/task-full-$CODENAME-kde tasks/task.list.kde
update_full_list tasks/task-full-$CODENAME-xfce tasks/task.list.xfce