Ksconf promote doesn't handle empty stanzas correctly

[lowell80]

The problem

Attempting to promote an empty stanza can result in the target stanza having content removed. This is undesirable. Likely due to 0.7.9 bug fixed where empty stanzas where previously ignored.

Environment

• Ksconf version: ksconf 0.7.9 (Build 555) Python: 2.7.18 (/opt/splunk/venv/bin/python)
• Installed via: pip

Details

Steps To Reproduce Issue

Example local/eventtypes.conf:

[existing-eventtype]

[new-eventtype]
search = some terms to search for

Example default/eventtypes.conf

[existing-eventtype]
search = sourcetype=mysourcetype

Command:

ksconf promote local/eventtypes.conf default -i
-[existing-eventtype]
-search = sourcetype=mysourcetype

+[existing-eventtype]

Apply [existing-eventtype] (y/n) n
+[new-eventtype]
+search = some terms to search for

Apply [new-eventtype] (y/n) n

Note that search = sourcetype=mysourcetype is shown for removal. This is incorrect. If applied, the values from default are removed, just as the preview/diff suggests.

[lowell80]

Fixed in d811597