sdm-apt-cacher

#!/bin/bash

econf=0    # 0 to edit /etc/apt/apt.conf.d/02proxy (Cleaner, but not visible on terminal)
           #!0 to edit /etc/apt/sources.list and /etc/apt/sources.list.d/raspi.list (more intrusive, but visible on terminal)

function enablecacher () {

    if [ $econf -eq 0 ]
    then
	[ ! -f /etc/apt/apt.conf.d/02proxy ] && echo "Acquire::http::proxy \"http://$1\";" >> /etc/apt/apt.conf.d/02proxy
    else
	if ! (grep $1 /etc/apt/sources.list > /dev/null 2>&1)
	then
	    sudo sed -i "s/http:\/\//http:\/\/$1\//" /etc/apt/sources.list
	    sudo sed -i "s/http:\/\//http:\/\/$1\//" /etc/apt/sources.list.d/raspi.list
	fi
    fi
}

[ "$2" != "" ] && serverip=$2
port=3142
mode="$1"
[ "$mode" == "" ] && mode=client && echo "% 'client' or 'server' not specified; assuming 'client'" 

if [ "$mode" == "client" ]
then
    enablecacher $serverip:$port          # Point the client to the apt caching server
else
    echo "% Setting up apt caching server"
    echo "% Answer NO to enabling HTTPS tunnels"
    sudo apt install -y apt-cacher-ng
    enablecacher 127.0.0.1:$port
    sudo rm -rf /var/lib/apt/lists
    sudo rm -rf /var/cache/apt/*
fi

#
# Resetting the apt-cacher-ng server cache
#
# No need to do it regularly unless disk space or other issues
#
# sudo systemctl stop apt-cacher-ng
# sudo rm -rf /var/cache/apt-cacher-ng
# sudo mkdir -p /var/cache/apt-cacher-ng
# sudo chown -R apt-cacher-ng:apt-cacher-ng /var/cache/apt-cacher-ng
# sudo systemctl start apt-cacher-ng
#