Loading multiple models

[SebastianSchildt]

Currently kuksa.val expects to load on VSS model (-vss parameter)

This tree can be extended/updated during runtime using updateVSSTree https://github.com/eclipse/kuksa.val/blob/master/doc/liveUpdateVSSTree.md

However, this needs to be done by an application (which also needs elevated rights in kuksa.val to do this)

It might be useful for a specific deployment, that kuksa.val loads and overlays several VSS files during startup, e.g.

• a core VSS (standard) model
• some vehicle-deployment specific additions
• other models (e.g. trailer, system information, etc...)

The goal of this feature would be to have an optional parameter giving a directory, where kuksa.val upon start and parsing of the main VSS file would load all JSON files sorted alphanumerically and apply them to the VSSDataBase using the same semantic as the liveUpdateVSSTree.