Squashed 'third_party/protobuf/' content from commit e35e248

Change-Id: I6cbe123d09fe50fdcad0e51466665daeee7433c7
git-subtree-dir: third_party/protobuf
git-subtree-split: e35e24800fb8d694bdeea5fd63dc7d1b14d68723
diff --git a/ruby/Rakefile b/ruby/Rakefile
new file mode 100644
index 0000000..81c3119
--- /dev/null
+++ b/ruby/Rakefile
@@ -0,0 +1,47 @@
+require "rubygems"
+require "rubygems/package_task"
+require "rake/extensiontask" unless RUBY_PLATFORM == "java"
+require "rake/testtask"
+
+spec = Gem::Specification.load("google-protobuf.gemspec")
+
+if RUBY_PLATFORM == "java"
+  if `which mvn` == ''
+    raise ArgumentError, "maven needs to be installed"
+  end
+  task :clean do
+    system("mvn clean")
+  end
+
+  task :compile do
+    system("mvn package")
+  end
+else
+  Rake::ExtensionTask.new("protobuf_c", spec) do |ext|
+    ext.ext_dir = "ext/google/protobuf_c"
+    ext.lib_dir = "lib/google"
+    ext.cross_compile = true
+    ext.cross_platform = [
+      'x86-mingw32', 'x64-mingw32',
+      'x86_64-linux', 'x86-linux',
+      'universal-darwin'
+    ]
+  end
+
+  task 'gem:windows' do
+    require 'rake_compiler_dock'
+    RakeCompilerDock.sh "bundle && rake cross native gem RUBY_CC_VERSION=2.3.0:2.2.2:2.1.6"
+  end
+end
+
+Gem::PackageTask.new(spec) do |pkg|
+end
+
+Rake::TestTask.new(:test => :build) do |t|
+  t.test_files = FileList["tests/*.rb"]
+end
+
+task :build => [:clean, :compile]
+task :default => [:build]
+
+# vim:sw=2:et