Remove all gems in your rbenv environment

nuke-gems

#!/usr/bin/env bash

RBENV_ROOT="$HOME/.rbenv"
if [[ -d "$RBENV_ROOT/bin" ]]
then
    export RBENV_ROOT
    export PATH="$HOME/.rbenv/bin:$PATH"
    eval "$(rbenv init -)"
else
    echo "Expected to find rbenv in $RBENV_ROOT!" 2>&1
    exit 1
fi

function uninstall
{
  for gem in $(gem list --no-versions)
  do
    gem uninstall "$gem" -aIx
  done
  gem list
  gem install bundler
}

if [[ $@ ]]
then
  RUBIES="$@"
else
  RUBIES="$(rbenv versions --bare)"
fi

for ruby in $RUBIES; do
  echo '---------------------------------------'
  echo $ruby
  (rbenv shell $ruby && uninstall) &
done

echo -n 'Waiting...'

wait

echo 'DONE!'