Add option to use default case class value during decoding of AvroTransient field

[minosiants]

Hello,
My use case is read data in protobuf format and translate it into avro format.
For protobuf I use scalapb library and it generates model case classes based on protobuf schema.
Generated case classes have UnknownFieldSet filed with default empty value. (There is an option to exclude them but I need them for analysis).
scalapb allows to inject annatations into generated classes (https://scalapb.github.io/docs/customizations#adding-annotations) so to exclude UnknownFieldSet filed from avro schema I use AvroTransient annotation. Everything works fine one model fror protobuf and avro but when avro4s tries to decode value that is marked with AvroTransient it returns None which cause class cast exception.

I added useDefault boolean flag into AvroTransient so now if it is true defalut value from the case class is used istead on none

[sksamuel]

FYI failing tests

[minosiants]

It fails on import pgp key. Not sure if it is part of the test. I will have a look

[sksamuel]

Might just need keys updated for latest central ?

[minosiants]

Sam I've added pgp key to the project setting I think it was the reason why it failed . Could you please try it again

[sksamuel]

Ran again

[minosiants]

Sam I added condition to run gpg steps only if PR is not from fork .
Github does not pass secrets from forks repos

https://docs.github.com/en/actions/how-tos/write-workflows/choose-what-workflows-do/use-secrets#using-secrets-in-a-workflow

[minosiants]

@sksamuel it is green now :)

[sksamuel]

Merged!