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#!/bin/bash

if [ ! `id -u` -eq 0 ]; then
  echo "Need to run as root"
  exit 1
fi

function get_timestamp() {
	numChar=5; # number of chars to take off end
	timeStamp=$(date +%Y%H%d.%N);
	endChar="$((${#timeStamp}-$numChar))";
	echo "$(echo $timeStamp | cut -c1-$endChar)";
}

DIR_BACKUP="/backup/$(get_timestamp)"
mkdir -p "$DIR_BACKUP"
cd "$DIR_BACKUP"


# Packages list
dpkg --get-selections > "packages.list"

# Repos list
mkdir "apt-sources"
cp -R /etc/apt/sources.list* "./apt-sources"

# Apt keys
apt-key exportall > "keys"

# Desktop apps
for app in $(ls /usr/share/applications); do
  echo "$app" >> usr-share-applications
done

# Local apps
if [ -d "$HOME/.local/share/applications" ]; then
  for app in $(ls "$HOME/.local/share/applications"); do
    echo "$app" >> "local-share-applications"
  done
fi

exit 0