Update Arch guest to the new networks API

lib/vagrant/guest/arch.rb

@@ -1,3 +1,6 @@
+require 'set'
+require 'tempfile'
+
 module Vagrant
   module Guest
     class Arch < Linux
@@ -10,23 +13,34 @@ module Vagrant
         end
       end
 
-      # TODO: Convert these to the new format
-      def prepare_host_only_network(net_options=nil)
-        vm.ssh.execute do |ssh|
-          ssh.exec!("sudo sed -e '/^#VAGRANT-BEGIN-HOSTONLY/,/^#VAGRANT-END-HOSTONLY/ d' /etc/rc.conf > /tmp/vagrant-network-interfaces")
-          ssh.exec!("sudo su -c 'cat /tmp/vagrant-network-interfaces > /etc/rc.conf'")
+      def configure_networks(networks)
+        # Remove previous Vagrant-managed network interfaces
+        vm.channel.sudo("sed -e '/^#VAGRANT-BEGIN/,/^#VAGRANT-END/ d' /etc/rc.conf > /tmp/vagrant-network-interfaces")
+        vm.channel.sudo("cat /tmp/vagrant-network-interfaces > /etc/rc.conf")
+
+        # Configure the network interfaces
+        interfaces = Set.new
+        entries = []
+        networks.each do |network|
+          interfaces.add(network[:interface])
+          entries << TemplateRenderer.render("guests/arch/network_#{network[:type]}",
+                                             :options => network)
         end
-      end
 
-      def enable_host_only_network(net_options)
-        entry = TemplateRenderer.render('guests/arch/network_hostonly',
-                                        :net_options => net_options)
-        vm.ssh.upload!(StringIO.new(entry), "/tmp/vagrant-network-entry")
+        # Perform the careful dance necessary to reconfigure
+        # the network interfaces
+        temp = Tempfile.new("vagrant")
+        temp.write(entries.join("\n"))
+        temp.close
 
-        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'")
+        vm.channel.upload(temp.path, "/tmp/vagrant-network-entry")
+
+        # Reconfigure the network interfaces
+        vm.channel.sudo("cat /tmp/vagrant-network-entry >> /etc/rc.conf")
+        vm.channel.sudo("/etc/rc.d/network restart")
+
+        interfaces.each do |interface|
+          vm.channel.sudo("dhcpcd -k eth#{interface} && dhcpcd eth#{interface} && sleep 3")
         end
       end
     end

templates/guests/arch/network_dhcp.erb

@@ -0,0 +1,7 @@
+#VAGRANT-BEGIN
+# The contents below are automatically generated by Vagrant. Do not modify.
+interface=eth<%= options[:interface] %>
+address=
+netmask=
+gateway=
+#VAGRANT-END

templates/guests/arch/network_hostonly.erb

@@ -1,7 +0,0 @@
-#VAGRANT-BEGIN-HOSTONLY
-# The contents below are automatically generated by Vagrant. Do not modify.
-interface=eth<%= net_options[:adapter] %>
-address=<%= net_options[:ip]%>
-netmask=<%= net_options[:netmask] %>
-gateway=
-#VAGRANT-END-HOSTONLY

templates/guests/arch/network_static.erb

@@ -0,0 +1,7 @@
+#VAGRANT-BEGIN
+# The contents below are automatically generated by Vagrant. Do not modify.
+interface=eth<%= options[:interface] %>
+address=<%= options[:ip]%>
+netmask=<%= options[:netmask] %>
+gateway=
+#VAGRANT-END