add label if there is hardware clock defined

src/lib/cfa/chrony_conf.rb

@@ -76,10 +76,16 @@ def pools
       Hash[pools_map]
     end
 
+    # Is there any hardware clock settings?
+    def hardware_clock?
+      !data.select(Matcher.new(collection: "refclock")).empty?
+    end
+
   private
 
     COLLECTION_KEYS = [
-      "pool"
+      "pool",
+      "refclock"
     ].freeze
     # if there is only one element of collection, augeas does not add [],
     # so fix it here for known keys which we modify ( and can be hitted with it )

src/lib/y2ntp_client/dialog/main.rb

@@ -4,6 +4,7 @@
 require "y2ntp_client/widgets"
 
 Yast.import "Label"
+Yast.import "NtpClient"
 Yast.import "Stage"
 
 module Y2NtpClient
@@ -29,6 +30,7 @@ def contents
           VSpacing(1),
           Left(Y2NtpClient::PolicyCombo.new),
           VSpacing(1),
+          *hardware_clock_widgets,
           Y2NtpClient::ServersTable.new
         )
       end
@@ -37,6 +39,17 @@ def abort_button
         Yast::Label.CancelButton
       end
 
+      def hardware_clock_widgets
+        if Yast::NtpClient.ntp_conf.hardware_clock?
+          [
+            Label(_("Hardware clock configured as source. YaST will keep it untouched.")),
+            VSpacing(1),
+          ]
+        else
+          [ Empty() ]
+        end
+      end
+
       def back_button
         # no back button
         ""

test/cfa/chrony_conf_test.rb

@@ -98,4 +98,27 @@ def ntp_conf(file)
       end
     end
   end
+
+  describe "hardware_clock?" do
+    context "hardware clock defined" do
+      let(:content) do
+        "refclock PPS /dev/pps0 lock NMEA refid GPS\n"
+      end
+
+      it "return true" do
+        expect(subject.hardware_clock?).to eq true
+      end
+    end
+
+    context "no hardware clock defined" do
+      let(:content) do
+        "rtcsync\n" \
+        "pool ntp.suse.cz offline\n"
+      end
+
+      it "return true" do
+        expect(subject.hardware_clock?).to eq false
+      end
+    end
+  end
 end