Create the basic provider plugin interface.

Non-functional at this point.

lib/vagrant.rb

@@ -91,6 +91,7 @@ module Vagrant
   c.register([:"1", :config])      { Plugin::V1::Config }
   c.register([:"1", :guest])       { Plugin::V1::Guest }
   c.register([:"1", :host])        { Plugin::V1::Host }
+  c.register([:"1", :provider])    { Plugin::V1::Provider }
   c.register([:"1", :provisioner]) { Plugin::V1::Provisioner }
 
   # Returns a `Vagrant::Registry` object that contains all the built-in

lib/vagrant/plugin/v1.rb

@@ -10,6 +10,7 @@ module Vagrant
       autoload :Guest,  "vagrant/plugin/v1/guest"
       autoload :Host,   "vagrant/plugin/v1/host"
       autoload :Plugin, "vagrant/plugin/v1/plugin"
+      autoload :Provider, "vagrant/plugin/v1/provider"
       autoload :Provisioner, "vagrant/plugin/v1/provisioner"
     end
   end

lib/vagrant/plugin/v1/provider.rb

@@ -0,0 +1,11 @@
+module Vagrant
+  module Plugin
+    module V1
+      # This is the base class for a provider for the V1 API. A provider
+      # is responsible for creating compute resources to match the needs
+      # of a Vagrant-configured system.
+      class Provider
+      end
+    end
+  end
+end

test/unit/vagrant_test.rb

@@ -16,6 +16,7 @@ describe Vagrant do
         described_class.plugin("1", :config).should == Vagrant::Plugin::V1::Config
         described_class.plugin("1", :guest).should == Vagrant::Plugin::V1::Guest
         described_class.plugin("1", :host).should == Vagrant::Plugin::V1::Host
+        described_class.plugin("1", :provider).should == Vagrant::Plugin::V1::Provider
         described_class.plugin("1", :provisioner).should == Vagrant::Plugin::V1::Provisioner
       end
     end