Command helpers `target_vms` now takes an optional string for the VM name

lib/vagrant/command/helpers.rb

@@ -11,14 +11,16 @@ module Vagrant
 
       # This returns an array of {VM} objects depending on the arguments
       # given to the command.
-      def target_vms
+      def target_vms(name=nil)
+        name ||= self.name
+
         @target_vms ||= begin
           if env.multivm?
-            return env.vms.values if !self.name
+            return env.vms.values if !name
-            vm = env.vms[self.name.to_sym]
+            vm = env.vms[name.to_sym]
-            raise Errors::VMNotFoundError.new(:name => self.name) if !vm
+            raise Errors::VMNotFoundError.new(:name => name) if !vm
           else
-            raise Errors::MultiVMEnvironmentRequired.new if self.name
+            raise Errors::MultiVMEnvironmentRequired.new if name
             vm = env.vms.values.first
           end
 

test/vagrant/command/helpers_test.rb

@@ -71,6 +71,11 @@ class CommandHelpersTest < Test::Unit::TestCase
         assert_equal @env.vms[:one], instance.target_vms.first
       end
 
+      should "return only the specified VM if name is given in the arg" do
+        instance = command([], @env)
+        assert_equal @env.vms[:two], instance.target_vms("two").first
+      end
+
       should "raise an exception if an invalid name is given" do
         instance = command(["foo"], @env)
         assert_raises(Vagrant::Errors::VMNotFoundError) {