[PoC] Add objects to read configuration from the system

src/lib/y2network/config_reader.rb

@@ -0,0 +1,32 @@
+# 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.
+module Y2Network
+  # This module contains a set of classes to read the network configuration from the system
+  #
+  # For the time being, only the wicked reader ({Y2Network::ConfigReader::Wicked}) reader is
+  # available.
+  module ConfigReader
+    def self.for(source = :wicked)
+      require "y2network/config_reader/#{source}"
+      name = source.to_s.split("_").map(&:capitalize).join
+      klass = self.const_get(name)
+      klass.new
+    end
+  end
+end

src/lib/y2network/config_reader/wicked.rb

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+# 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 "y2network/config"
+
+Yast.import "LanItems"
+
+module Y2Network
+  module ConfigReader
+    # This class reads the current configuration from the system
+    class Wicked
+      # @return [Y2Network::Config] Network configuration
+      def config
+        Yast::LanItems.Read
+        Config.new(interfaces: interfaces)
+      end
+
+      def interfaces
+        # TODO: for the time being, we are just relying in the underlying stuff.
+        Yast::LanItems.current_device_names.map do |name|
+          Y2Network::Interface.new(name)
+        end
+      end
+    end
+  end
+end

test/y2network/config_reader/wicked_test.rb

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+# 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_relative "../../test_helper"
+require "y2network/config_reader/wicked"
+
+describe Y2Network::ConfigReader::Wicked do
+  subject(:reader) { described_class.new }
+
+  let(:lan_items) do
+    instance_double(
+      Yast::LanItemsClass,
+      Read: nil,
+      current_device_names: ["lo", "eth0", "wlan0"]
+    )
+  end
+
+  describe "" do
+    before do
+      allow(Yast).to receive(:import).with("LanItems")
+      stub_const("Yast::LanItems", lan_items)
+    end
+
+    it "returns a configuration including network devices" do
+      config = reader.config
+      expect(config.interfaces.map(&:name)).to eq(["lo", "eth0", "wlan0"])
+    end
+  end
+end

test/y2network/config_reader_test.rb

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+# 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_relative "../test_helper"
+require "y2network/config_reader"
+
+describe Y2Network::ConfigReader do
+  describe ".for" do
+    it "returns the reader for the given source" do
+      reader = Y2Network::ConfigReader.for(:wicked)
+      expect(reader).to be_a(Y2Network::ConfigReader::Wicked)
+    end
+  end
+end