guests/tinycore: error if DHCP [GH-4699]

plugins/guests/tinycore/cap/configure_networks.rb

@@ -7,6 +7,10 @@ module VagrantPlugins
         def self.configure_networks(machine, networks)
           machine.communicate.tap do |comm|
             networks.each do |n|
+              if n[:type] == :dhcp
+                raise Errors::NetworkStaticOnly
+              end
+
               ifc = "/sbin/ifconfig eth#{n[:interface]}"
               broadcast = (IPAddr.new(n[:ip]) | (~ IPAddr.new(n[:netmask]))).to_s
               comm.sudo("#{ifc} down")

plugins/guests/tinycore/errors.rb

@@ -0,0 +1,13 @@
+module VagrantPlugins
+  module GuestTinyCore
+    module Errors
+      class TinyCoreError < Vagrant::Errors::VagrantError
+        error_namespace("vagrant_tinycore.errors")
+      end
+
+      class NetworkStaticOnly < TinyCoreError
+        error_key(:network_static_only)
+      end
+    end
+  end
+end

plugins/guests/tinycore/plugin.rb

@@ -2,29 +2,45 @@ require "vagrant"
 
 module VagrantPlugins
   module GuestTinyCore
+    autoload :Errors, File.expand_path("../errors", __FILE__)
+
     class Plugin < Vagrant.plugin("2")
       name "TinyCore Linux guest."
       description "TinyCore Linux guest support."
 
       guest("tinycore", "linux")  do
         require File.expand_path("../guest", __FILE__)
+        init!
         Guest
       end
 
       guest_capability("tinycore", "configure_networks") do
         require_relative "cap/configure_networks"
+        init!
         Cap::ConfigureNetworks
       end
 
       guest_capability("tinycore", "halt") do
         require_relative "cap/halt"
+        init!
         Cap::Halt
       end
 
       guest_capability("tinycore", "rsync_install") do
         require_relative "cap/rsync"
+        init!
         Cap::RSync
       end
+
+      protected
+
+      def self.init!
+        return if defined?(@_init)
+        I18n.load_path << File.expand_path(
+          "templates/locales/guest_tinycore.yml", Vagrant.source_root)
+        I18n.reload!
+        @_init = true
+      end
     end
   end
 end

templates/locales/guest_tinycore.yml

@@ -0,0 +1,8 @@
+en:
+  vagrant_tinycore:
+    errors:
+      network_static_only: |-
+        The TinyCore guest doesn't support DHCP for networks. Please use
+        a static assigned IP. If you know how to configure DHCP for
+        TinyCore, please open an issue on Vagrant with the steps and we'd
+        be happy to bring this functionality in.