Replace straight abort on interrupt with clean exit via exception

bin/vagrant

@@ -8,7 +8,7 @@ begin
   Vagrant::CLI.start(ARGV, :env => env)
 rescue Vagrant::Errors::VagrantError => e
   opts = { :_translate => false, :_prefix => false }
-  env.ui.error e.message, opts
+  env.ui.error e.message, opts if e.message
   env.ui.error e.backtrace.join("\n"), opts if ENV["VAGRANT_DEBUG"]
   exit e.status_code if e.respond_to?(:status_code)
   exit 999 # An error occurred with no status code defined

lib/vagrant/action/warden.rb

@@ -35,7 +35,7 @@ module Vagrant
           act.recover(env) if act.respond_to?(:recover)
         end
 
-        exit if env.interrupted?
+        raise Errors::VagrantInterrupt.new if env.interrupted?
       end
 
       def finalize_action(action, env)

lib/vagrant/errors.rb

@@ -32,7 +32,7 @@ module Vagrant
       def initialize(message=nil, *args)
         message = { :_key => message } if message && !message.is_a?(Hash)
         message = { :_key => error_key, :_namespace => error_namespace }.merge(message || {})
-        message = translate_error(message)
+        message = translate_error(message) if message[:_key]
 
         super
       end
@@ -44,7 +44,7 @@ module Vagrant
 
       # The key for the error message. This should be set using the
       # {error_key} method but can be overridden here if needed.
-      def error_key; ""; end
+      def error_key; nil; end
 
       protected
 
@@ -203,6 +203,10 @@ module Vagrant
       error_key(:ssh_unavailable_windows)
     end
 
+    class VagrantInterrupt < VagrantError
+      status_code(40)
+    end
+
     class VirtualBoxInvalidOSE < VagrantError
       status_code(9)
       error_key(:virtualbox_invalid_ose)

test/vagrant/action/warden_test.rb

@@ -80,10 +80,11 @@ class ActionWardenTest < Test::Unit::TestCase
     end
 
     should "call exit if the environment is interupted" do
-      @instance.expects(:exit)
       env = new_env
       env.expects(:interrupted?).returns(true)
+      assert_raises(Vagrant::Errors::VagrantInterrupt) {
         @instance.begin_rescue(env)
+      }
     end
 
     context "with many middleware" do