Update Gems, Update RubyGems, Fix warnings.

update.sh

#!/usr/bin/env bash

sudo gem update
yes | sudo gem clean
sudo gem update --system

if [ ! -f /usr/local/bin/brew ]
  then
    ruby -e "$(curl -fsSL https://gist.github.com/raw/323731/install_homebrew.rb)"
fi

if [ ! -f /usr/local/bin/gsed ]
  then
    brew install gnu-sed
fi

sudo gem pristine --all --no-extensions
gems=$(gem -v 2>&1 | grep called | gsed -r -e 's#^.*specifications/##' -e 's/-[0-9].*$//')

for gem in $gems
do
  echo Fixing $gem...
  sudo gem pristine $gem -- -build-arg
done