validate_local_cache.sh

#!/usr/bin/env sh

if ! which md5sum > /dev/null; then
	echo Install md5sum
	exit 1
fi
 
if ! which curl > /dev/null; then
	echo Install curl
	exit 1
fi
 
echo This will take a while...

for x in ~/.rvm/gems/*; do
	home=$x
	cache=$home/cache
	if [ -d $cache ]
	then
		for gem in $cache/*.gem; do
			gemfile=$(basename $gem)
 
			local=$(md5sum $gem | awk '{print $1}')
			remote=$(curl -s -D - -X HEAD -H 'Connection:close' http://production.cf.rubygems.org/gems/$gemfile | grep 'ETag' | cut -d '"' -f 2)
 
			if [[ ! $local = $remote ]]; then
				echo $gemfile mismatch. local: $local, remote: $remote
			fi
		done
	fi
done
 
echo All done.

validate_local_cache_openssl.sh

#!/usr/bin/env sh

if ! which openssl > /dev/null; then
	echo Install openssl
	exit 1
fi
 
if ! which curl > /dev/null; then
	echo Install curl
	exit 1
fi
 
echo This will take a while...

for x in ~/.rvm/gems/*; do
	home=$x
	cache=$home/cache
	if [ -d $cache ]
	then
		for gem in $cache/*.gem; do
			gemfile=$(basename $gem)
 
			local=$(openssl md5 $gem | awk '{print $2}')
			remote=$(curl -s -D - -X HEAD -H 'Connection:close' http://production.cf.rubygems.org/gems/$gemfile | grep 'ETag' | cut -d '"' -f 2)
 
			if [[ ! $local = $remote ]]; then
				echo $gemfile mismatch. local: $local, remote: $remote
			fi
		done
	fi
done
 
echo All done.

here's a version for rbenv gemsets : https://gist.github.com/4682402

In case if you run into

./validate_local_cache_openssl.sh: 31: [[: not found

just run scripts with

bash validate_local_cache_openssl.sh 

On my change I changed from #!/usr/bin/env sh to #!/bin/bash to explicit call bash.