archlinux host only network support [closes GH-448]

lib/vagrant/systems/arch.rb

@@ -11,6 +11,24 @@ module Vagrant
           end
         end
       end
+
+      def prepare_host_only_network(net_options=nil)
+        vm.ssh.execute do |ssh|
+          ssh.exec!("sudo sed -e '/^#VAGRANT-BEGIN/,/^#VAGRANT-END/ d' /etc/rc.conf > /tmp/vagrant-network-interfaces")
+          ssh.exec!("sudo su -c 'cat /tmp/vagrant-network-interfaces > /etc/rc.conf'")
+        end
+      end
+
+      def enable_host_only_network(net_options)
+        entry = TemplateRenderer.render('network_entry_arch', :net_options => net_options)
+        vm.ssh.upload!(StringIO.new(entry), "/tmp/vagrant-network-entry")
+
+        vm.ssh.execute do |ssh|
+          ssh.exec!("sudo su -c 'cat /tmp/vagrant-network-entry >> /etc/rc.conf'")
+          ssh.exec!("sudo /etc/rc.d/network restart")
+          ssh.exec!("sudo su -c 'dhcpcd -k eth0 && dhcpcd eth0 & sleep 3'")
+        end
+      end
     end
   end
 end

templates/network_entry_arch.erb

@@ -0,0 +1,9 @@
+
+#VAGRANT-BEGIN
+# The contents below are automatically generated by Vagrant.
+# Please do not modify any of these contents.
+interface=eth<%= net_options[:adapter] %>
+address=<%= net_options[:ip]%>
+netmask=<%= net_options[:netmask] %>
+gateway=
+#VAGRANT-END