$ jruby --version
jruby 1.6.4 (ruby-1.8.7-p330) (2011-08-23 17ea768) (Java HotSpot(TM) 64-Bit Server VM 1.6.0_26) [darwin-x86_64-java]

I think I've uninstalled the jls-grok gem, I've verified using this:

Victors-MacBook-Air:ruby victorng$ jgem list

*** LOCAL GEMS ***

bert (1.1.2 java)
brick (0.0.3)
bundle (0.0.1)
bundler (1.0.21)
ffi-rzmq (0.8.2)
git (1.2.5)
jeweler (1.6.2)
jruby-httpclient (1.0.0 java)
json (1.6.1 java, 1.5.0 java)
json-jruby (1.5.0 java)
mime-types (1.16)
rake (0.9.2, 0.8.7)
rdoc (3.6.1)
rest-client (1.6.7)
slop (2.1.0)
sources (0.0.1)
Victors-MacBook-Air:ruby victorng$

jirb says I have no grok installed either:

$ jirb -rubygems
irb(main):001:0> require 'grok-pure'
LoadError: no such file to load -- grok-pure
..bunch of stuff deleted here...

Ok, so now I go to install jls-grok from source:

Victors-MacBook-Air:ruby victorng$ jrake
WARNING:  no rubyforge_project specified
  Successfully built RubyGem
  Name: jls-grok
  Version: 0.9.0
  File: jls-grok-0.9.0.gem
Victors-MacBook-Air:ruby victorng$

Install the gem:

Victors-MacBook-Air:ruby victorng$ jgem install ./jls-grok-0.9.0.gem
Successfully installed jls-grok-0.9.0
1 gem installed
Victors-MacBook-Air:ruby victorng$

Verify the gem installed properly:

Victors-MacBook-Air:ruby victorng$ jgem list

*** LOCAL GEMS ***

bert (1.1.2 java)
brick (0.0.3)
bundle (0.0.1)
bundler (1.0.21)
ffi-rzmq (0.8.2)
git (1.2.5)
jeweler (1.6.2)
jls-grok (0.9.0)
jruby-httpclient (1.0.0 java)
json (1.6.1 java, 1.5.0 java)
json-jruby (1.5.0 java)
mime-types (1.16)
rake (0.9.2, 0.8.7)
rdoc (3.6.1)
rest-client (1.6.7)
slop (2.1.0)
sources (0.0.1)
Victors-MacBook-Air:ruby victorng$


Run tests:

Victors-MacBook-Air:test victorng$ make test-pure
JRUBY_OPTS=--1.9 LD_LIBRARY_PATH="${LD_LIBRARY_PATH}:$PWD/../../" RUBYLIB="$PWD/../lib" ruby pure-ruby/alltests.rb
Loading tests: pure-ruby/general/basic_test.rb
/Users/victorng/dev/grok/ruby/test/../lib/grok-pure.rb:22: warning: regexp has invalid interval
./pure-ruby/general/basic_test.rb:2:in `require': /Users/victorng/dev/grok/ruby/test/../lib/grok-pure.rb:22: undefined (?...) sequence: /%{    # match '%{' not prefixed with '\' (SyntaxError)
       (?<name>     # match the pattern name
         (?<pattern>[A-z0-9]+)
         (?::(?<subname>[A-z0-9_:]+))?
       )
       (?:=(?<definition>
         (?:
           (?:[^{}\\]+|\\.+)+
           |
           (?<curly>\{(?:(?>[^{}]+|(?>\\[{}])+)|(\g<curly>))*\})+
         )+
       ))?
       [^}]*
     }/
    from ./pure-ruby/general/basic_test.rb:2
    from pure-ruby/alltests.rb:7:in `load'
    from pure-ruby/alltests.rb:7
    from pure-ruby/alltests.rb:5:in `each'
    from pure-ruby/alltests.rb:5
make: *** [test-pure] Error 1
Victors-MacBook-Air:test victorng$