scripts: T4269: node.def generator should automatically add default values

Since introducing the XML <defaultValue> node it was common, but redundant,
practice to also add a help string indicating which value would be used as
default if the node is unset.

This makes no sense b/c it's duplicated code/value/characters and prone to
error. The node.def scripts should be extended to automatically render the
appropriate default value into the CLI help string.

For e.g. SSH the current PoC renders:

$ cat templates-cfg/service/ssh/port/node.def
  multi:
  type: txt
  help: Port for SSH service (default: 22)
  val_help: u32:1-65535; Numeric IP port
  ...

Not all subsystems are already migrated to get_config_dict() and make use of
the defaults() call - those subsystems need to be migrated, first before the new
default is added to the CLI help.

1 files changed, 3 insertions, 3 deletions

diff --git a/interface-definitions/service_monitoring_telegraf.xml.in b/interface-definitions/service_monitoring_telegraf.xml.in
index 0db9052ff..f0a94d6a9 100644
--- a/interface-definitions/service_monitoring_telegraf.xml.in
+++ b/interface-definitions/service_monitoring_telegraf.xml.in
@@ -44,19 +44,19 @@
               </node>
               <leafNode name="bucket">
                 <properties>
-                  <help>Remote bucket, by default (main)</help>
+                  <help>Remote bucket</help>
                 </properties>
                 <defaultValue>main</defaultValue>
               </leafNode>
               <leafNode name="source">
                 <properties>
-                  <help>Source parameters for monitoring (default: all)</help>
+                  <help>Source parameters for monitoring</help>
                   <completionHelp>
                     <list>all hardware-utilization logs network system telegraf</list>
                   </completionHelp>
                   <valueHelp>
                     <format>all</format>
-                    <description>All parameters (default)</description>
+                    <description>All parameters</description>
                   </valueHelp>
                   <valueHelp>
                     <format>hardware-utilization</format>