[RFC] Initialize with defaults when no exist. (cache problems)

src/clients/lan_auto.rb

@@ -62,8 +62,12 @@ def main
         @ret = Lan.Summary("summary")
       elsif @func == "Reset"
         Lan.Import({})
+        Yast::Lan.clear_configs
         @ret = {}
       elsif @func == "Change"
+        unless Yast::Lan.yast_config
+          Yast::Lan.add_config(:yast, Y2Network::Config.from(:defaults))
+        end
         @ret = LanAutoSequence("")
       elsif @func == "Import"
         @new = Lan.FromAY(@param)

src/include/network/services/routing.rb

@@ -91,19 +91,19 @@ def RoutingMainDialog
 
     def config
       # TODO: get it from some config holder
-      @routing_config ||= Yast::Lan.yast_config
+      @routing_config = Yast::Lan.yast_config
     end
 
     def routing_table
-      @routing_table_widget ||= Y2Network::Widgets::RoutingTable.new(config.routing.tables.first)
+      @routing_table_widget = Y2Network::Widgets::RoutingTable.new(config.routing.tables.first)
     end
 
     def ip4_forwarding
-      @ip4_forwarding_widget ||= Y2Network::Widgets::IP4Forwarding.new(config)
+      @ip4_forwarding_widget = Y2Network::Widgets::IP4Forwarding.new(config)
     end
 
     def ip6_forwarding
-      @ip6_forwarding_widget ||= Y2Network::Widgets::IP6Forwarding.new(config)
+      @ip6_forwarding_widget = Y2Network::Widgets::IP6Forwarding.new(config)
     end
 
     def add_button

src/lib/y2network/config_reader/defaults.rb

@@ -0,0 +1,58 @@
+# Copyright (c) [2019] SUSE LLC
+#
+# All Rights Reserved.
+#
+# This program is free software; you can redistribute it and/or modify it
+# under the terms of version 2 of the GNU General Public License as published
+# by the Free Software Foundation.
+#
+# This program is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+# more details.
+#
+# You should have received a copy of the GNU General Public License along
+# with this program; if not, contact SUSE LLC.
+#
+# To contact SUSE LLC about this file by physical or electronic mail, you may
+# find current contact information at www.suse.com.
+
+require "yast"
+require "y2network/interface"
+require "y2network/config"
+require "y2network/routing"
+require "y2network/routing_table"
+
+Yast.import "Lan"
+
+module Y2Network
+  module ConfigReader
+    # This class is responsible of initializing the default configuration
+    class Defaults
+      def initialize(_options)
+      end
+
+      def config
+        interfaces = find_interfaces
+        routing = Y2Network::Routing.new(tables: [Y2Network::RoutingTable.new])
+        Y2Network::Config.new(interfaces: interfaces, routing: routing, source: :sysconfig)
+      end
+
+    private
+
+      # Find configured network interfaces
+      #
+      # Configured interfaces have a configuration (ifcfg file) assigned.
+      #
+      # @return [Array<Interface>] Detected interfaces
+      # @see Yast::NetworkInterfaces.Read
+      def find_interfaces
+        Yast::NetworkInterfaces.Read
+        # TODO: for the time being, we are just relying in the underlying stuff.
+        Yast::NetworkInterfaces.List("").map do |name|
+          Y2Network::Interface.new(name)
+        end
+      end
+    end
+  end
+end