A short script for performing brew cleanup for all but specified packages. The 'cleanup' command can either be used for specific packages or for all - there is no exclusion option - and this means cleanup on older packages that I want.

brew-cleanup.sh

#!/usr/bin/env bash

# Clean all but specified packages of old homebrewed installed packages

declare -a exclude=(python python3  python34 python35 python36 python27 pypy ruby node)

for PACKAGE in $(brew ls)
do
    SENTINEL=false
    for EXCLUDE in "${exclude[@]}"
    do
        if [ "$PACKAGE" = "$EXCLUDE" ]; then
            SENTINEL=true
        fi
    done
    if [ "$SENTINEL" = false ] ; then
        echo "Cleaning up $PACKAGE"
        brew cleanup $PACKAGE
    else
        echo "Skipping cleanup on $PACKAGE"
    fi
done