Jenkins shell script to run headless rails tests

gistfile1.sh

# loads RVM into current shell for correct ruby and gem environment
source /etc/profile.d/rvm.sh

# source the .rvmrc file in the project
cd .

# instantiates an Xvfb session on display port 99
Xvfb :99 -ac &

# environment variable to let firefox know where to run
export DISPLAY=:99

# run tests with a custom rake task to fire up Capybara and Selenium Web driver
rake test:browser

# Jenkins will pass or fail this script based on the final return value, so I am saving the return value for later use 
set $STATUS = $?

# end Xvfb session
killall Xvfb

# let Jenkins know how the tests went
exit $STATUS