I want to have a crack at extending the way

test

can collect additional stuff. Currently you can define

[test].extra_env_vars

to inject extra stuff into the env, and

runtime_package_dependencies

to add packageable targets to the test process digest. But from a quick skim of the code, all of this is replicated in each backends subprocess call. My thinking is to push it up a level so the

TestRequest

contains a

env_vars

and a

additional_digest

that the backend folds into its subprocess calls. Then

extra_env_vars

and

runtime_package_dependencies

could be implemented as Union rules, and other plugins can then set up prerequisites for tests as needed. ie. for my use case, I want to upload a target to a 3rd party and run integration tests against the remote resource. ... Is there a preferred process for going about making this sort of (large?) change?

Yes! It’s probably worth creating a github discussion with an overview of the design changes you’d like to make, so that we can discuss them.