Remove old bundles that aren't being used any more

rename_old_rubygems.sh

#!/usr/bin/env bash

set -euo pipefail

for i in $( ls /data/vhost|grep -v 'lost+found'); do
	echo $i
	dir="/data/vhost/$i/shared/bundle/ruby"
	versions=$(ls -1 $dir|grep -v '.backup');
	in_use=$(cat /data/vhost/$i/releases/*/.ruby-version | sed 's/[0-9]\+$/0/' | sort | uniq);
	echo -e "in use\n----\n$in_use\n"
	echo -e "available\n---\n$versions\n"

	redundant=$(comm -13 <(cat /data/vhost/$i/releases/*/.ruby-version | sort | uniq | sed 's/[0-9]\+$/0/') <(ls -1 /data/vhost/$i/shared/bundle/ruby))
	echo -e "redundant\n---\n$redundant\n"

	for tomove in $redundant; do
		echo "moving from $dir/$tomove to $dir/$tomove.backup"
    
		# Rename instead of delete to check nothing breaks
		sudo mv $dir/$tomove $dir/$tomove.backup
	done
done

# Total amount of space that can be saved
find /data/vhost -name '*.backup' -exec du -ch {} + | grep total$