Removes cached packages which have 2+ more recent package versions cached

cleanpkg.sh

#!/bin/bash

if [[ $EUID -ne 0 ]]; then
    echo "This script must be run as root" 1>&2
    exit 1
fi

x="zzzzz"
copies=()
CLEAN_DIR="/var/cache/pacman/pkg"

for f in "$CLEAN_DIR"/*; do
    name=$(echo "$f" | sed 's/[0-9\.\-]*//g')
    if [[ "$name" == "$x" ]]; then
	copies+=("$f")
	if [[ ${#copies[@]} == 3 ]]; then
	    rm ${copies[0]}
	    copies=("${copies[@]:1:2}")
	fi
    else
	x="$name"
	copies=()
	copies+=("$f")
    fi
done