Plugin Infrastructure: How to implement plugin upgrades?

Hi all,

I am working on a custom plugin for Cacti. When I upgrade the plugin
files on my installation (including a change of the version number),
Cacti still displays the old version, even though the new files are
being used (apparently that information is pulled out of the
plugin_config table).

How should I go about implementing upgrades in my plugin? The example
plugin code (plgexample) features a plugin_plgexample_upgrade()
function, but as far as I have seen, Cacti never calls that function.

For now, the only way to do upgrades seems to be Uninstall & Install,
but since I create new database tables with
api_plugin_db_table_create(), this procedure will result in losing all
data every time the plugin is upgraded.

I am using a stock Cacti 0.8.8a during my development.

Any ideas?

Best regards

Oliver

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