core: Scaffold an action for persisting box information

lib/vagrant/action.rb

@@ -25,6 +25,7 @@ module Vagrant
       autoload :SSHExec, "vagrant/action/builtin/ssh_exec"
       autoload :SSHRun,  "vagrant/action/builtin/ssh_run"
       autoload :WaitForCommunicator, "vagrant/action/builtin/wait_for_communicator"
+      autoload :WriteBoxInfo, "vagrant/action/builtin/write_box_info"
     end
 
     module General
@@ -39,6 +40,7 @@ module Vagrant
     def self.action_box_add
       Builder.new.tap do |b|
         b.use Builtin::BoxAdd
+        b.use Builtin::WriteBoxInfo
       end
     end
   end

lib/vagrant/action/builtin/write_box_info.rb

@@ -0,0 +1,24 @@
+require "log4r"
+
+module Vagrant
+  module Action
+    module Builtin
+      # This middleware will persist some extra information about the base box
+      class WriteBoxInfo
+        def initialize(app, env)
+          @app    = app
+          @logger = Log4r::Logger.new("vagrant::action::builtin::write_box_info")
+        end
+
+        def call(env)
+          box_url   = env[:box_url]
+          box_added = env[:box_added]
+
+          # TODO: Persist box_url / provider / datetime
+
+          @app.call(env)
+        end
+      end
+    end
+  end
+end