fix review comments

net: add render_route comment to document why we added || true to route
statements
DataSourceConfigDrive: Only convert network_json to network_config when 
caller reads network_config attr.  Cache the conversion.

1 files changed, 3 insertions, 3 deletions

diff --git a/cloudinit/sources/DataSourceConfigDrive.py b/cloudinit/sources/DataSourceConfigDrive.py
index db813f6e..14676f97 100644
--- a/cloudinit/sources/DataSourceConfigDrive.py
+++ b/cloudinit/sources/DataSourceConfigDrive.py
@@ -153,9 +153,6 @@ class DataSourceConfigDrive(openstack.SourceMixin, sources.DataSource):
             LOG.warn("Invalid content in network-data: %s", e)
             self.network_json = None
 
-        if self.network_json:
-            self._network_config = convert_network_data(self.network_json)
-
         return True
 
     def check_instance_id(self):
@@ -164,6 +161,9 @@ class DataSourceConfigDrive(openstack.SourceMixin, sources.DataSource):
 
     @property
     def network_config(self):
+        if self._network_config is None:
+            if self.network_json is not None:
+                self._network_config = convert_network_data(self.network_json)
         return self._network_config