I highly recommend using RVM for this, my
local .rvmrc
for this project, which will never be checked in is as follows:
rvm use jruby@vagrant-plugin
This will make sure that I'm using the latest JRuby with a vagrant-plugin
gemset.
You should really only need to run these two commands:
% gem install bundler
% bundle install
That should set up all the gems you need, which once installed you should be able to run:
% jpi server
Which will bring up Jenkins locally with the Vagrant plugin enabled.