#! /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 be void or 'here' only"
		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 .

sudo dpkg --get-selections > "manual_package_save"

a=C4.sh

echo "#! /bin/bash" > $a
echo "" >> $a
echo "cd .." >> $a
echo "rm -r \"$pathName\"" >> $a

chmod u+x "$a"

b="package_restore.sh"

echo "#! /bin/bash" > $b
echo "" >> $b
echo 'if [ $(id -u) -ne "0" ]; then' >> $b
echo '	 echo "Please execute with superuser privileges"' >> $b
echo "	 exit -1" >> $b
echo fi >> $b
echo "" >> $b
echo cp ./sources.list /etc/apt/sources.list >> $b
echo cp ./preferences.d/my_preferences /etc/apt/preferences.d/my_preferences >> $b
echo 'cp -r ./sources.list.d/* /etc/apt/sources.list.d' >> $b
echo "" >> $b
echo apt-get update >> $b
echo apt-get install dselect >> $b
echo "dpkg --set-selections < "manual_package_save"" >> $b
echo apt-get dselect-upgrade >> $b
echo apt-get remove dselect >> $b

chmod u-x "$b"

cd -

exit