human readable diff in case of changes; correct sort for portgroups i…

…nside XML

lib/puppet/provider/libvirt_network/virsh.rb

@@ -96,7 +96,16 @@ def content
     formatter = REXML::Formatters::Pretty.new(2)
     formatter.compact = true
     output = ''.dup
-    formatter.write(recursive_sort(xml.root), output)
+
+    xml = recursive_sort(xml.root)
+    sorted_portgroups = xml.root.get_elements('//portgroup').sort_by { |obj| obj.attributes['name'] }
+
+    REXML::XPath.match(xml, '//portgroup').each(&:remove)
+    sorted_portgroups.each do |pg|
+      xml.root.add_element pg
+    end
+
+    formatter.write(xml.root, output)
     output
   end
 

lib/puppet/type/libvirt_network.rb

@@ -46,6 +46,22 @@
       raise ArgumentError, 'content needs to be a XML string' unless value.is_a?(String)
     end
 
+    def change_to_s(current, desire)
+      if @resource[:show_diff]
+        current_exp = Tempfile.new("current", "/tmp").open
+        current_exp.write(current.to_s)
+        current_exp.close
+        current_path = current_exp.path
+        desire_exp = Tempfile.new("desire", "/tmp").open
+        desire_exp.write(desire.to_s)
+        desire_exp.close
+        desire_path = desire_exp.path
+        system "diff -u #{current_path} #{desire_path}"
+      else
+        '{md5}' + Digest::MD5.hexdigest(current.to_s) + " to: " + '{md5}' + Digest::MD5.hexdigest(desire.to_s)
+      end
+    end
+
     def should_to_s(value)
       if @resource[:show_diff]
         ":\n" + value + "\n"