Make requiring a single VM target in a command more DRY

lib/vagrant/command/base.rb

@@ -59,7 +59,9 @@ module Vagrant
       # specific VM name is specified.
       #
       # @param [String] name The name of the VM. Nil if every VM.
-      def with_target_vms(name=nil)
+      # @param [Boolean] single_target If true, then an exception will be
+      #   raised if more than one target is found.
+      def with_target_vms(name=nil, single_target=false)
         # Using VMs requires a Vagrant environment to be properly setup
         raise Errors::NoEnvironmentError if !@env.root_path
 
@@ -73,6 +75,9 @@ module Vagrant
           vms = @env.vms_ordered
         end
 
+        # Make sure we're only working with one VM if single target
+        raise Errors::MultiVMTargetRequired if single_target && vms.length != 1
+
         # Go through each VM and yield it!
         vms.each do |old_vm|
           # We get a new VM from the environment here to avoid potentially

lib/vagrant/command/package.rb

@@ -51,12 +51,7 @@ module Vagrant
       end
 
       def package_target(name, options)
-        if @env.multivm? && name.nil?
-          # In a multi-VM environment, a name is required.
-          raise Errors::MultiVMTargetRequired, :command => "package"
-        end
-
-        with_target_vms(name) do |vm|
+        with_target_vms(name, true) do |vm|
           raise Errors::VMNotCreatedError if !vm.created?
           @logger.debug("Packaging VM: #{vm.name}")
           package_vm(vm, options)

lib/vagrant/command/ssh.rb

@@ -19,11 +19,8 @@ module Vagrant
         argv = parse_options(opts)
         return if !argv
 
-        # SSH always requires a target VM
-        raise Errors::MultiVMTargetRequired, :command => "ssh" if @env.multivm? && !argv[0]
-
         # Execute the actual SSH
-        with_target_vms(argv[0]) do |vm|
+        with_target_vms(argv[0], true) do |vm|
           # Basic checks that are required for proper SSH
           raise Errors::VMNotCreatedError if !vm.created?
           raise Errors::VMInaccessible if !vm.state == :inaccessible

lib/vagrant/command/ssh_config.rb

@@ -19,10 +19,7 @@ module Vagrant
         argv = parse_options(opts)
         return if !argv
 
-        # SSH-config always requires a target VM
-        raise Errors::MultiVMTargetRequired, :command => "ssh_config" if @env.multivm? && !argv[0]
-
-        with_target_vms(argv[0]) do |vm|
+        with_target_vms(argv[0], true) do |vm|
           raise Errors::VMNotCreatedError if !vm.created?
           raise Errors::VMInaccessible if !vm.vm.accessible?
 

templates/locales/en.yml

@@ -67,7 +67,8 @@ en:
         You specified: %{home_path}
       interrupted: "Vagrant exited after cleanup due to external interrupt."
       multi_vm_required: "A multi-vm environment is required for name specification to this command."
-      multi_vm_target_required: "`vagrant %{command}` requires a specific VM name to target in a multi-VM environment."
+      multi_vm_target_required: |-
+        This command requires a specific VM name to target in a multi-VM environment.
       no_env: |-
         A Vagrant environment is required to run this command. Run `vagrant init`
         to set one up.