Write better tests and support for aliases

[sagikazarmark]

No description provided.

[eddiewang]

trying to generate some mga scaffolding via aliased types like so:

// +mga:event:handler
type EvtJournalShareShepard = luxproto.JournalHeader

// +mga:event:handler
type EvtJournalBlockFind = luxproto.JournalHeader

The usecase here is to allow the protobuf definition's themselves to be the event struct that will be passed to watermill in the event dispatcher pattern.

Would love to know if there's any path to take to support that. Currently I am getting the error unknown type <NameOfAliasedType>

Assuming this is related to the feature request here, but let me know if I should create a seperate issue for it.

[sagikazarmark]

This issue is related to the event dispatcher generator, but it's actually the same issue for handlers as well.

The problem is that the code generation library (https://github.com/kubernetes-sigs/controller-tools) doesn't work well with aliases and I haven't find a good solution so far.