Add action for box repackaging [closes GH-120]

lib/vagrant/action/box/package.rb

@@ -0,0 +1,19 @@
+require 'vagrant/action/general/package'
+
+module Vagrant
+  class Action
+    module Box
+      # Packages a box which has already been unpackaged (such as
+      # for the `vagrant box repackage` command) by leveraging the
+      # general packager middleware.
+      class Package < General::Package
+        # Alias instead of calling super for testability
+        alias_method :general_call, :call
+        def call(env)
+          env["package.directory"] = env["box"].directory
+          general_call(env)
+        end
+      end
+    end
+  end
+end

lib/vagrant/action/builtin.rb

@@ -110,6 +110,13 @@ module Vagrant
       end
 
       register :box_remove, box_remove
+
+      # box_repackage - Repackages a box.
+      box_repackage = Builder.new do
+        use Box::Package
+      end
+
+      register :box_repackage, box_repackage
     end
   end
 end

test/vagrant/action/box/package_test.rb

@@ -0,0 +1,25 @@
+require "test_helper"
+
+class PackageBoxActionTest < Test::Unit::TestCase
+  setup do
+    @klass = Vagrant::Action::Box::Package
+    @app, @env = mock_action_data
+    @env["box"] = Vagrant::Box.new(mock_environment, "foo")
+
+    @instance = @klass.new(@app, @env)
+  end
+
+  should "be a subclass of general packaging middleware" do
+    assert @instance.is_a?(Vagrant::Action::General::Package)
+  end
+
+  should "set the package directory then call parent" do
+    @instance.expects(:general_call).once.with() do |env|
+      assert env["package.directory"]
+      assert_equal env["package.directory"], @env["box"].directory
+      true
+    end
+
+    @instance.call(@env)
+  end
+end