I created a library called mack that exposes some helper functions delta-spark helper functions that users commonly need:
https://github.com/MrPowers/mack. The library has gotten a lot of traction in a short period of time.
We might want to build some of these features directly into delta-rs eventually. Deduplicating a Delta table is a great example. Lots of users want to perform this function and we could provide them with a performant out-of-the-box implementation. Thoughts?