Could gix_object::Find be async?

[NicholasLYang]

Summary 💡

Make the gix_object::Find trait require an async function. Or create an alternate async implementation for LookupRefDeltaObjectsIter that takes in an async version of Find.

Motivation 🔦

I've been playing around with using gitoxide to build a git server backed by SQL. I'm resolving packfiles using LookupRefDeltaObjectsIter, but I need to run some async code in the Find trait, since I need to fetch from a database.

I'm down to contribute a PR if you're open to that!

[Byron]

For something to be async, it must satisfy certain conditions like:

• it does minimal work when polled
• it is cancellable

This is simply not true unless the operation is performed in a thread, something you can do with tokio::spawn_blocking() for instance.

Due to that, the non-transport parts won't ever be async - it would be a lie.