Add rake-compiler-dock for building Windows binary gems.

Author: larskanis

Gemfile

@@ -6,6 +6,7 @@ gemspec name: 'concurrent-ruby-edge'
 group :development do
   gem 'rake', '~> 10.4.2'
   gem 'rake-compiler', '~> 0.9.5'
+  gem 'rake-compiler-dock', '~> 0.4.0'
   gem 'gem-compiler', '~> 0.3.0'
   gem 'benchmark-ips', '~> 2.2.0'
 

Rakefile

@@ -135,6 +135,15 @@ namespace :build do
       sh 'mv *.gem pkg/'
     end
   end
+
+  desc "Build the windows binary gems per rake-compiler-dock"
+  task :windows do
+    require 'rake_compiler_dock'
+    RakeCompilerDock.sh <<-EOT
+      bundle --without="development testing" &&
+      rake cross native gem RUBY_CC_VERSION=1.9.3:2.0.0:2.1.6:2.2.2
+    EOT
+  end
 end
 
 if Concurrent.on_jruby?