SetHostname uses new cap system

lib/vagrant/action/builtin/set_hostname.rb

@@ -18,7 +18,7 @@ module Vagrant
           hostname = env[:machine].config.vm.hostname
           if !hostname.nil?
             env[:ui].info I18n.t("vagrant.actions.vm.hostname.setting")
-            env[:machine].guest.change_host_name(hostname)
+            env[:machine].guest.capability(:change_host_name, hostname)
           end
         end
       end

plugins/guests/debian/cap/change_host_name.rb

@@ -0,0 +1,18 @@
+module VagrantPlugins
+  module GuestDebian
+    module Cap
+      class ChangeHostName
+        def self.change_host_name(machine, name)
+          machine.communicate.tap do |comm|
+            if !comm.test("hostname --fqdn | grep '^#{name}$' || hostname --short | grep '^#{name}$'")
+              comm.sudo("sed -r -i 's/^(127[.]0[.]1[.]1[[:space:]]+).*$/\\1#{name} #{name.split('.')[0]}/' /etc/hosts")
+              comm.sudo("sed -i 's/.*$/#{name.split('.')[0]}/' /etc/hostname")
+              comm.sudo("hostname -F /etc/hostname")
+              comm.sudo("hostname --fqdn > /etc/mailname")
+            end
+          end
+        end
+      end
+    end
+  end
+end

plugins/guests/debian/cap/configure_networks.rb

@@ -1,3 +1,6 @@
+require 'set'
+require 'tempfile'
+
 require "vagrant/util/template_renderer"
 
 module VagrantPlugins

plugins/guests/debian/guest.rb

@@ -1,31 +1,9 @@
-require 'set'
-require 'tempfile'
-
-require "vagrant"
-require 'vagrant/util/template_renderer'
-
-require Vagrant.source_root.join("plugins/guests/linux/guest")
-
 module VagrantPlugins
   module GuestDebian
-    class Guest < VagrantPlugins::GuestLinux::Guest
-      # Make the TemplateRenderer top-level
-      include Vagrant::Util
-
+    class Guest < Vagrant.plugin("2", :guest)
       def detect?(machine)
         machine.communicate.test("cat /proc/version | grep 'Debian'")
       end
-
-      def change_host_name(name)
-        vm.communicate.tap do |comm|
-          if !comm.test("hostname --fqdn | grep '^#{name}$' || hostname --short | grep '^#{name}$'")
-            comm.sudo("sed -r -i 's/^(127[.]0[.]1[.]1[[:space:]]+).*$/\\1#{name} #{name.split('.')[0]}/' /etc/hosts")
-            comm.sudo("sed -i 's/.*$/#{name.split('.')[0]}/' /etc/hostname")
-            comm.sudo("hostname -F /etc/hostname")
-            comm.sudo("hostname --fqdn > /etc/mailname")
-          end
-        end
-      end
     end
   end
 end

plugins/guests/debian/plugin.rb

@@ -15,6 +15,11 @@ module VagrantPlugins
         require_relative "cap/configure_networks"
         Cap::ConfigureNetworks
       end
+
+      guest_capability("debian", "change_host_name") do
+        require_relative "cap/change_host_name"
+        Cap::ChangeHostName
+      end
     end
   end
 end