Uninstall all rbenv gems

uninstall_gems.sh

#!/usr/bin/env bash
#
# Originally from https://gist.github.com/IanVaughan/2902499

uninstall() {
  list=`gem list --no-versions`
  for gem in $list; do
    gem uninstall $gem -aIx
  done
  gem list
  gem install bundler
}

## To uninstall ALL the gems for a specific ruby version
RUBY_VERSION=#2.2.6 or whatever your version is
rbenv local $RUBY_VERSION
uninstall

## To uninstall ALL the gems for ALL your ruby versions
#rbenv versions --bare
RBENVPATH=`rbenv root`
echo $RBENVPATH
RUBIES=`ls $RBENVPATH/versions`
for ruby in $RUBIES; do
  echo '---------------------------------------'
  echo $ruby
  rbenv local $ruby
  uninstall
done