Shell script experiments for exporting and installing gems for different versions of Ruby

sh_gem_awk_rbenv

TL;DR 
Putting it all together: Make sure you are using the Ruby version that you need to export from

$ gem list > ~/gemlist && rbenv local rbx-1.2.4 && \
gem install `awk -F' ' '{print $1}' ~/gemlist` && rm ~/gemlist


How I got there:
By exporting to a file:

$ gem list > ~/gemlist
$ awk -F' ' '{ print $1}' ~/gemlist


In a single command: (pipes FTW!)

$ gem list | awk -F' ' '{ print $1 }'


Installing in the 2nd version of Ruby:

$ gem install `awk -F' ' '{print $1}' ~/gemlist`