#! /bin/bash

name=packages_state
location="$HOME/SYS_SAVES/"

if [ $# -ne 0 ]; then
	if [ ! -z "$1" -a "$1" != "here" ]; then
		name=$1
	fi
	if [ "$2" = here -o "$1" = here ]; then
		location="."
	elif [ ! -z "$2" ]; then
		echo "Second argument can only be null or 'here'"
		exit
	fi
fi

cd $location
pathName="$name""_$(date +'%Y-%m-%d @ %Hh%M')"

mkdir "$pathName"
cd "$pathName"
mkdir "./preferences.d"

cp /etc/apt/sources.list .
cp /etc/apt/preferences.d/my_preferences ./preferences.d/
cp -r --copy-contents /etc/apt/sources.list.d .

dpkg --get-selections > "manual_package_save"
apt-key exportall > "apt_keys"

a=C4.sh

cat <<EOF > "$a"
#! /bin/bash

cd ..
rm -r "$pathName"

EOF

chmod u+x "$a"

b="package_restore.sh"

cat <<EOF > "$b"
#! /bin/bash"

if [ $(id -u) -ne "0" ]; then
	echo "Please execute with superuser privileges"
	exit -
fi

cp ./sources.list /etc/apt/sources.list
cp ./preferences.d/my_preferences /etc/apt/preferences.d/my_preferences
cp -r ./sources.list.d/* /etc/apt/sources.list.d'

apt-key add < "apt_keys"
apt-get update
apt-get install dselect
dselect update
dpkg --set-selections < "manual_package_save"
apt-get dselect-upgrade -y
apt-get remove dselect

EOF

chmod u-x "$b"

cd -

exit