logstash/logstash — pull request #811 by jordansissel (2013-11-28 01:07:42+00:00)
Title: Invoke jruby compilation from ruby code, not via jrubyc

This prevents 'java -jar jruby.jar -S jrubyc' from running something
from $PATH which breaks because jruby expects ruby code and rvm provides
a bash script in its place.