RUBY-SWITCHER AND RUBYGEMS.sh

# RUBY-SWITCHER AND RUBYGEMS
# ==========================================
# Thanks in part to <http://blog.thinkrelevance.com/2009/7/29/ruby-switcher-working-with-multiple-ruby-versions-has-never-been-this-easy/>
# and the other part, well, HARD WORK IS HARD!!!!


# SETUP
cd
curl -O -L http://github.com/relevance/etc/raw/26ae85c2f6c7d2640a3c75d619ad7ab8fc1cc570/bash/ruby_switcher.sh
echo "source ~/ruby_switcher.sh" >> .bash_profile
source .bash_profile

# INSTALL A RUBY, let's say 1.8.7
install_ruby_187
use_ruby_187

# now install rubygems, so we can do useful things.
wget http://rubyforge.org/frs/download.php/60718/rubygems-1.3.5.tgz
tar -xvzf rubygems-1.3.5.tgz
cd rubygems-1.3.5
ruby setup.rb --prefix=~/.gem/
echo "export RUBYLIB=~$MY_RUBY_HOME/lib:~/.gem/lib" >> ~/.bash_profile
echo 'export PATH=~.gem/bin/:$PATH' >> ~/.bash_profile
source ~/.bash_profile    # no sure if this is needed or not

# NOW INSTALL A GEM -- it should work now
gem install lockfile      # must NOT use sudo

# POSSIBLE AREAS FOR IMPROVEMENT:
# use_ruby_187 sets $GEM_HOME (to ~/.gem/ruby/1.8). One could modify the script to
# set this to something logical (for example, ~/.gem_versions/ruby-1.8.7-p174/),
# install rubygems to ~/.gem_versions/ruby-1.8.7-p174/lib,
# and set RUBYLIB to include that path on the search parameters. I'll leave that as
# an exercise for the reader.
#
# OR just realize you are most of the way towards a working virtual-env for Ruby...