coordinate building of gems for 3 different platforms

gemspec.rb

@@ -57,4 +57,9 @@
 Hitimes::GEM_SPEC_MINGW32.platform = ::Gem::Platform.new( "i386-mingw32" )
 Hitimes::GEM_SPEC_MINGW32.extensions = []
 
-Hitimes::SPECS = [ Hitimes::GEM_SPEC, Hitimes::GEM_SPEC_MSWIN32, Hitimes::GEM_SPEC_MINGW32 ] 
+Hitimes::GEM_SPEC_JAVA = Hitimes::GEM_SPEC.clone
+Hitimes::GEM_SPEC_JAVA.platform = ::Gem::Platform.new( 'java' )
+Hitimes::GEM_SPEC_JAVA.extensions = []
+
+Hitimes::SPECS = [ Hitimes::GEM_SPEC, Hitimes::GEM_SPEC_MSWIN32, Hitimes::GEM_SPEC_MINGW32, Hitimes::GEM_SPEC_JAVA ]
+

tasks/distribution.rake

@@ -36,11 +36,16 @@ if pkg_config = Configuration.for_if_exist?("packaging") then
       puts Hitimes::GEM_SPEC_WIN.to_ruby
     end
 
+    desc "dump gemspec for java"
+    task :gemspec_java do
+      puts Hitimes::GEM_SPEC_JAVA.to_ruby
+    end
+
     desc "reinstall gem"
     task :reinstall => [:uninstall, :repackage, :install]
 
     desc "package up a windows gem"
-    task :package_win => :clean do
+    task :package_win => :clean  do
       Configuration.for("extension").cross_rbconfig.keys.each do |rbconfig|
         v = rbconfig.split("-").last
         s = v.sub(/\.\d$/,'')
@@ -58,15 +63,25 @@ if pkg_config = Configuration.for_if_exist?("packaging") then
       end
     end
 
+    if RUBY_PLATFORM == "java" then
+      desc "package up a jruby gem"
+      task :package_java => "ext:build_java" do
+        Hitimes::GEM_SPEC_JAVA.files += FileList["lib/hitimes/java/*.jar"]
+        Gem::Builder.new( Hitimes::GEM_SPEC_JAVA ).build
+        mv Dir["*.gem"].first, "pkg"
+      end
+    end
+
     task :clobber do
       rm_rf "lib/hitimes/1.8"
       rm_rf "lib/hitimes/1.9"
+      rm_rf "lib/hitimes/*.jar"
     end
 
-    task :prep => [:clean, :package, :package_win]
+    task :prep => [:clean, :package, :package_win, :package_java ]
 
     desc "distribute copiously"
-    task :copious => [:clean, :package, :package_win ] do
+    task :copious => [:clean, :package, :package_win, :package_java ] do
       gems = Hitimes::SPECS.collect { |s| "#{s.full_name}.gem" }
       Rake::SshFilePublisher.new('jeremy@copiousfreetime.org',
                                '/var/www/vhosts/www.copiousfreetime.org/htdocs/gems/gems',

tasks/extension.rake

@@ -8,7 +8,7 @@ require 'pathname'
 if ext_config = Configuration.for_if_exist?('extension') then
   namespace :ext do  
     desc "Build the extension(s)"
-    task :build => :clean do
+    task :build => :clobber do
       ext_config.configs.each do |extension|
         path  = Pathname.new(extension)
         parts = path.split
@@ -26,17 +26,20 @@ if ext_config = Configuration.for_if_exist?('extension') then
       end
     end 
 
-    desc "Build the jruby extension"
-    task :build_jruby => :clean do
-      path = "ext/java"
-      Dir.chdir( path ) do |d|
-        #java_ext = "lib/hitimes/java/#{RUBY_VERSION.sub(/\.\d$/,'')}/hitimes_ext.#{Config::CONFIG['DLEXT']}"
-        java_ext = "lib/hitimes/hitimes.jar"
+    if RUBY_PLATFORM == "java" then
+      desc "Build the jruby extension"
+      task :build_java => [ :clobber, "lib/hitimes/hitimes.jar" ]
+
+      file "lib/hitimes/hitimes.jar" => FileList["ext/java/src/hitimes/*.java"] do |t|
         jruby_home = Config::CONFIG['prefix']
-        classpath = "#{jruby_home}/lib/jruby.jar"
-        FileUtils.mkdir_p "../../#{File.dirname( java_ext )}"
-        sh "javac -g -cp #{classpath} hitimes/*.java"
-        sh "jar cf ../../#{java_ext} hitimes/*.class"
+        jruby_jar  = File.join( jruby_home, 'lib', 'jruby.jar' )
+
+        mkdir_p 'pkg/classes'
+        sh "javac -classpath #{jruby_jar} -d pkg/classes #{t.prerequisites.join(' ')}"  
+
+        dest_dir = File.dirname(t.name)
+        mkdir_p dest_dir
+        sh "jar cf #{t.name} -C pkg/classes ."
       end
     end