vagrant-scp-sync.rb in vagrant-scp-sync-0.5.11

- old
+ new

@@ -1,14 +1,25 @@
 # frozen_string_literal: true
 
-require 'vagrant-scp-sync/version'
-require 'vagrant-scp-sync/plugin'
-require 'vagrant-scp-sync/errors'
+require 'pathname'
 
 module VagrantPlugins
   # This is used to SCP files to/from Guests and Hosts
   module ScpSync
+    lib_path = Pathname.new(File.expand_path('vagrant-scp-sync', __dir__))
+    autoload :Errors, lib_path.join('errors')
     def self.source_root
       @source_root ||= Pathname.new(File.expand_path('..', __dir__))
     end
   end
 end
+
+begin
+  require 'vagrant'
+rescue LoadError
+  raise 'The Vagrant vagrant-zones plugin must be run within Vagrant.'
+end
+
+raise 'The Vagrant vagrant-zones plugin is only compatible with Vagrant 2+.' if Vagrant::VERSION < '2'
+
+require 'vagrant-scp-sync/version'
+require 'vagrant-scp-sync/plugin'