Rakefile in iruby-0.3 vs Rakefile in iruby-0.4.0

@@ -3,13 +3,39 @@
 begin
   require 'bundler/gem_tasks'
 rescue Exception
 end
 
+FileList['tasks/**.rake'].each {|f| load f }
+
 Rake::TestTask.new('test') do |t|
   t.libs << 'lib'
   t.libs << 'test'
   t.test_files = FileList['test/**/*_test.rb']
   t.verbose = true
 end
 
 task default: 'test'
+
+namespace :docker do
+  def root_dir
+    @root_dir ||= File.expand_path("..", __FILE__)
+  end
+
+  task :build do
+    container_name = "iruby_build"
+    image_name = "mrkn/iruby"
+    sh "docker", "run",
+       "--name", container_name,
+       "-v", "#{root_dir}:/tmp/iruby",
+       "rubylang/ruby", "/bin/bash", "/tmp/iruby/docker/setup.sh"
+    sh "docker", "commit", container_name, image_name
+    sh "docker", "rm", container_name
+  end
+
+  task :test do
+    root_dir = File.expand_path("..", __FILE__)
+    sh "docker", "run", "-it", "--rm",
+       "-v", "#{root_dir}:/tmp/iruby",
+       "mrkn/iruby", "/bin/bash", "/tmp/iruby/docker/test.sh"
+  end
+end