How do I setup a custom Gem.path using JRuby::Rack?

Question

Hi Nick et al,

I've been having some fun looking at to source code of JRuby-Rack and Rubygems to try to figure out how to solve a

org.jruby.rack.RackInitializationException: no such file to load -- compass

in my rackup script cased by require 'compass'. I'm passing in a custom 'gem.path' as a servlet init parameter and it is being correctly picked up by jruby-rack as far as I can tell by debugging in my rackup script:

ENV['GEM_PATH'] => '/foo/lib/.jruby/gems' (expected)

but rubygems seems to be broken:

Gem.path => file:/foo/lib/jruby-complete-1.4.0.jar!/META-INF/jruby.home/lib/ruby/gems/1.8

I'm not sure why rubygems has not adjusted it's gem_path nor the LOAD_PATH, thus breaking require?

Thanks again, I'm still a newbie at ruby, jruby, rack and sinatra. Any pointers in the right direction appreciated!

Ben

Answer 1

Hi Ben,

I don't have an answer for you, but I am having a similar problem. I've packaged a custom gem into a jar that is included in my JRuby/Rack/Sinatra web application's classpath. For some reason it's not finding the actual ruby script in the gem even though it's there:

org.jruby.rack.RackInitializationException: JAR entry gems/sinatra-linkedin-auth-0.0.1-java/lib/sinatra/linkedin-auth.rb not found in /Users/bhaidri/code/nextgen-ui/dist/darwin-war/exploded-war/WEB-INF/lib/linkedin-gems-0.0.1.jar

I've checked and re-checked that the ruby file exists in the jar at that exact path that the error is stating it's not found. This was working just fine before, but I changed the package structure of the gem to have my script be located at lib/sinatra/linkedin-auth instead of just lib/linkedin-sinatra-auth.

Any ideas? Your help would be much appreciated!

Thanks, Baq