ubuntu-cleanup.sh

#!/bin/bash
# This script requires package "apt-show-versions" that will be installed if not present.
# This script asks user to remove packages that don't belong to main ubuntu repository.
# In other words , seeks for packages installed from all PPA installed , and asks the user if want to remove or not.
# with this script you can remove some or all packages of a given PPA , and also in later part of script will ask
# user if wants to remove PPA configuration forever from system.
# This script also will search for orfan packages, packages than went removed from main Ubuntu repository , but
# somehow is still installed on system. the user will have the option to delete those.
#don't forget to add valid values in configuration part of the script.these values can be obtained doing a
#apt-cache policy <package> , being the selected package , one from the main ubuntu repositories.
#the values pre-configured in the script should work well for most cases.
#from my /etc/apt/sources.list , deb http://pt.archive.ubuntu.com/ubuntu/ wily universe , the default value used ;
# archive.ubuntu.com will match most of the cases , using mirrors from any other country. just ubuntu.com/ubuntu
#or ubuntu.com would be a safe string choice too.
# feedback , bugs or new implementations , please email ubuntu-cleanup@outlook.pt
#changelog
# Version 1 - 15/1/2016
# Version 1.1 - 17/1/2016 - added log notices - install script dependencies / delete packages/PPA
# / apt-get update to /var/log/syslog
# Version 1.2 - 18/1/2016 - improvement in function list_packages_and_prompt_user variable $extraction2 . was causing a bug in some cases. now fixed.
# Version 1.3 - 18/1/2016 - start of the script and breaking with control-c now logs to syslog
# Version 1.4 - 18/1/2016 - implemented session identification , for better control of logs. sessions id are saved ( /var/lib/ubuntu-cleanup-sessions )
# and later compared against the generate_session_id function , to guarantee that sessions are unique in a universe of 2^64 values.

trap ctrl_c INT

function validate_userid_equal_0 {
if [ "$(id -u)" != "0" ]; then
    echo "This script uses superuser privileges therefore must be run with sudo" 1>&2
    exit 1
fi
}

function ctrl_c() {
        logger "ubuntu.cleanup.sh - Control-c pressed by user. script aborted - session id - $id"
    exit 130
}

function generate_session_id {
if [ ! -e $ubuntucleanupsessions ] ; then
    touch "$ubuntucleanupsessions"
fi
id=`shuf -i 1-18446744073709551615 -n1 --random-source=/dev/random`
if grep -Fq $id "$ubuntucleanupsessions" ;
    then
        generate_session_id
else
        echo $id >> "$ubuntucleanupsessions"
fi

}

function the_start_of_script_should_log_to_syslog {
logger "ubuntu.cleanup.sh - script started - session id - $id"
}

function install_script_requirements {

file1="/usr/bin/apt-show-versions"

if [ ! -f $file1 ] ; then
    echo "requirements not met, installing : apt-show-versions"
    sleep 2
    apt-get install -y apt-show-versions && logger "ubuntu.cleanup.sh - Installed package apt-show-versions - session id - $id"
fi
}

function Yy {
    read -p "Do you want to remove this package ? (y/n)" -n 1 -r && echo -e

if [[  $REPLY =~ ^[Yy]$ ]]
    then
        apt-get -y purge $i && logger "ubuntu.cleanup.sh - Remove package $i from system - belonged to $extraction2 PPA - session id - $id"
    else
        continue
fi
}

function clean_ppa {
echo "the final part of the script is to clean ppa than you don't really want to use no more."
repositories=(/etc/apt/sources.list.d/*.list)
for f in "${repositories[@]}"; do
   echo "$f"
    read -p "Do you want to remove this ppa ? (y/n)" -n 1 -r && echo -e

if [[  $REPLY =~ ^[Yy]$ ]]
    then
        sudo rm -f $f
        echo "$f removed !" && logger "ubuntu.cleanup.sh - Removed PPA $f from /etc/apt/sources.list.d/ - session id - $id"
    else
        continue
fi
done
}


function list_packages_and_prompt_user {
for i in $(dpkg --get-selections | awk '{print $1}') ; do
    echo $i
extraction2=`grep -oHs $(apt-cache policy $i |grep -i http | awk '{print $2}' | sed -e 's/\/$//g') /etc/apt/sources.list.d/*.list |tr ' ' '\n'  |grep -n http | awk -F: '{print $2}'`
z=`apt-cache policy $i |grep -i "$url" |grep "$value" |wc -l`
if (( z == 0 )) ; then
clear
echo "###############"
apt-cache policy $i
echo "###############"
echo "this package belongs to repository below :"
if [ -z "$extraction2" ]; then
    echo "Could not find related repository"
else
    echo $extraction2 | awk '{print $1}'
fi
Yy
fi
done
}

function remove_no_longer_maintained_packages {
echo "removing packages that are no longer maintained/ not exist in the repositories"
number_of_not_existent_packges=`apt-show-versions | grep 'No available' | cut -d' ' -f 1 | wc -l`
if (( number_of_not_existent_packges != 0 )) ; then
    echo "found $number_of_not_existent_packges packages"
    for i in `apt-show-versions | grep 'No available' | cut -d' ' -f 1` ; do  echo -e $i ; Yy ; done
else
        echo "no packages in this state found !"
fi
}

function exit_script {
echo "finishing with apt-get update ..."
sudo apt-get update > /dev/null && logger "ubuntu.cleanup.sh - script finished - session id - $id"
echo "Script completed !"
exit 1
}

## editable configuration ##
url=archive.ubuntu.com
value=500
ubuntucleanupsessions=/var/lib/ubuntu-cleanup-sessions
## end of config ##

validate_userid_equal_0
generate_session_id
the_start_of_script_should_log_to_syslog
install_script_requirements
list_packages_and_prompt_user
remove_no_longer_maintained_packages
clean_ppa
exit_script