Use separate Rakefile for native ext compilation

Signed-off-by: Alex Coles <alex@alexbcoles.com>

Rakefile

@@ -158,16 +158,3 @@ begin
   end
 rescue LoadError
 end
-
-task :simple_compile do
-  # Pick the right class path, depending if we're using an rvm installed JRuby
-  jruby_cpath = ENV['MY_RUBY_HOME'] || ENV['JRUBY_HOME']
-  raise 'MY_RUBY_HOME or JRUBY_HOME are not set' unless jruby_cpath
-
-  puts 'Doing a simple compilation'
-  sh %(javac -source 1.6 -target 1.6 -cp #{jruby_cpath}/lib/jruby.jar ext/java/**/*.java)
-  mkdir_p 'lib/jrubytesting'
-  sh %(jar cf lib/jrubytesting/test_jruby_library.jar -C ext/java jrubytesting/TestJrubyLibraryService.class)
-  puts
-end
-task :default => :simple_compile

ext/Rakefile

@@ -0,0 +1,12 @@
+task :simple_compile do
+  # Pick the right class path, depending if we're using an rvm installed JRuby
+  jruby_cpath = ENV['MY_RUBY_HOME'] || ENV['JRUBY_HOME']
+  raise 'MY_RUBY_HOME or JRUBY_HOME are not set' unless jruby_cpath
+
+  puts 'Doing a simple compilation'
+  sh %(javac -source 1.6 -target 1.6 -cp #{jruby_cpath}/lib/jruby.jar ext/java/**/*.java)
+  mkdir_p 'lib/jrubytesting'
+  sh %(jar cf lib/jrubytesting/test_jruby_library.jar -C ext/java jrubytesting/TestJrubyLibraryService.class)
+  puts
+end
+task :default => :simple_compile

test-jruby-library.gemspec

@@ -35,7 +35,7 @@ Gem::Specification.new do |s|
 
   ## This sections is only necessary if you have C extensions.
   s.require_paths << 'ext'
-  s.extensions = %w[Rakefile]
+  s.extensions = %w[ext/Rakefile]
 
   ## If your gem includes any executables, list them here.
   # s.executables = ["name"]