[jruby-dev] [jira] (JRUBY-6759) Gem_in_a_jar does not work properly in rails with backticks

[Cris Shupp (JIRA)]

Cris Shupp created JRUBY-6759 Gem_in_a_jar does not work properly in rails with backticks Issue Type: Bug Affects Versions: JRuby 1.6.7 Assignee: Unassigned Components: Ruby 1.8.7 Created: 03/Jul/12 1:29 PM Description: gem_in_a_jar, as found here: http://blog.nicksieger.com/articles/2009/01/10/jruby-1-1-6-gems-in-a-jar/ cannot be used in rails unless the gems are specified in bundler's Gemfile, this might make no sense but it will... For this example we will arbitrarily use the time-warp gem C:\temp\gem_in_jar>java -jar c:\languages\jruby-1.6.7.2\lib\jruby-complete-1.6.7.2.jar -S gem install -i ./time_warp time-warp Fetching: time-warp-1.0.13.gem (100%) Successfully installed time-warp-1.0.13 1 gem installed C:\temp\gem_in_jar>jar cf tw-gem.jar -C time_warp . C:\temp\gem_in_jar>ls | grep tw tw-gem.jar Now we have our 'Gem in a jar' via tw-gem.jar. Consider the following script (tw-test.rb): require 'java' require 'tw-gem.jar' require 'rubygems' require "time_warp" puts "success!" We will launch this script via tw_test_backtick.rb: puts "hi" result = `java -jar c:\\languages\\jruby-1.6.7.2\\lib\\jruby-complete-1.6.7.2.jar ./tw_test.rb 2>&1` puts result Here is the result: C:\temp\gem_in_jar>java -jar c:\languages\jruby-1.6.7.2\lib\jruby-complete-1.6.7.2.jar tw_test_backtick.rb hi success! So our gem in a jar worked! Now let us put this code into a rails app: C:\temp\gem_in_jar>java -jar c:\languages\jruby-1.6.7.2\lib\jruby-complete-1.6.7.2.jar -S rails new gem_in_jar create create README.rdoc create Rakefile etc... In rails root we will place tw-gem.jar and tw-test.rb, and then in RAILS_ROOT/config/initializers we create runbackticks.rb as follows: begin puts "hi" result = `java -jar c:\\languages\\jruby-1.6.7.2\\lib\\jruby-complete-1.6.7.2.jar ./tw_test.rb 2>&1` puts result end Next we start up WEBrick: C:\temp\gem_in_jar\gem_in_jar>java -jar c:\languages\jruby-1.6.7.2\lib\jruby-complete-1.6.7.2.jar -S ./script/rails server -e development -p 3000 => Booting WEBrick => Rails 3.2.5 application starting in development on http://0.0.0.0:3000 => Call with -d to detach => Ctrl-C to shutdown server hi LoadError: no such file to load -- time_warp require at org/jruby/RubyKernel.java:1033 (root) at ./tw_test.rb:4 [2012-07-03 13:36:03] INFO WEBrick 1.3.1 [2012-07-03 13:36:03] INFO ruby 1.8.7 (2012-05-01) [java] [2012-07-03 13:36:03] INFO WEBrick::HTTPServer#start: pid=4368 port=3000 In rails it fails to find the appropriate 'gem in a jar' even though it is invoked via back ticks (remember the 'gem in a jar' is in rails root)! The only (awful) fix I can find is to modify the 'Gemfile' and add the line " gem 'time-warp'" then run bundler's install as follows: C:\temp\gem_in_jar\gem_in_jar>java -jar c:\languages\jruby-1.6.7.2\lib\jruby-complete-1.6.7.2.jar -S bundle install Fetching gem metadata from https://rubygems.org/......... .... Installing time-warp (1.0.13) Now it works: C:\temp\gem_in_jar\gem_in_jar>java -jar c:\languages\jruby-1.6.7.2\lib\jruby-complete-1.6.7.2.jar -S ./script/rails server -e development -p 3000 => Booting WEBrick => Rails 3.2.5 application starting in development on http://0.0.0.0:3000 => Call with -d to detach => Ctrl-C to shutdown server hi success! But it does not really work as I can make tw-gem.jar be of size zero, so it never really uses the jar. In a nutshell I have no way to separate the dependencies of my jobs from those of my rails app which runs the jobs. BTW if, in tw_test.rb, I change the require 'tw_gem.jar' to tw_gem2.jar it does complain about not finding the jar (from the rails app) so I know it is finding the jar. Environment: Windows xp 32 bit Ruby version 1.8.7 (java) RubyGems version 1.8.24 Rack version 1.4 Rails version 3.2.5 _javascript_ Runtime therubyrhino (Rhino) Active Record version 3.2.5 Action Pack version 3.2.5 Active Resource version 3.2.5 Action Mailer version 3.2.5 Active Support version 3.2.5 Middleware     ActionDispatch::Static     Rack::Lock     #<ActiveSupport::Cache::Strategy::LocalCache::Middleware:0xa205d1>     Rack::Runtime     Rack::MethodOverride     ActionDispatch::RequestId     Rails::Rack::Logger     ActionDispatch::ShowExceptions     ActionDispatch::DebugExceptions     ActionDispatch::RemoteIp     ActionDispatch::Reloader     ActionDispatch::Callbacks     ActiveRecord::ConnectionAdapters::ConnectionManagement     ActiveRecord::QueryCache     ActionDispatch::Cookies     ActionDispatch::Session::CookieStore     ActionDispatch::Flash     ActionDispatch::ParamsParser     ActionDispatch::Head     Rack::ConditionalGet     Rack::ETag     ActionDispatch::BestStandardsSupport Application root C:/temp/gem_in_jar/gem_in_jar Environment development Database adapter sqlite3 Database schema version Project: JRuby Priority: Major Reporter: Cris Shupp

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