A shim for @rubygems to make gem install behave more like @npm.

gem.zsh

#! /bin/zsh -f
#alias -g i=install

#RUBY_VERSION=`ruby -e 'print RUBY_VERSION'`
#export PATH=$PATH:ruby/$RUBY_VERSION/bin:$GEM_HOME/bin
gem () {
  case $@ in
    install*-g*) command gem install ${@:3};;
    install*) command gem install ${@:2} --install-dir=ruby/$RUBY_VERSION;;
    rm*) command gem uninstall $@;;
    *) command gem $@;;
  esac
}