ryanabrams

#!/bin/bash

if [ "$#" -ne "1" ]; then
    echo "Usage: $0 package_list"
    exit 1
fi

cat $1 | xargs -I {} bash -c "echo {}; brew deps {}" | sort | uniq > /tmp/brew_keep
comm -23 <(brew list -1 | sort) <(cat /tmp/brew_keep) > /tmp/brew_rm
lines=$(cat /tmp/brew_rm | wc -l | sed -e 's/ //g')