Python Bindings v0.1.0 (WIP)

[baszalmstra]

With #279 we have the first implementation of python bindings for rattler. 🎉

For v0.1.0 of the bindings we would like to be able to achieve the following goal:

🥅 You can solve and install an environment using the Python bindings.

We want to be able to do this to make it easier for users coming from Python to start using rattler as their base library for everything conda instead of having to rely on conda or mamba.

To that end, the following code needs to be worked on:

• You can fetch repodata from a remote or local channel.
  • The main entry point is: fetch_repo_data.
  • We have to determine how we will manage memory. Since RepoData takes up a significant amount of memory we want to reduce copying, duplication, etc. The solver also takes PackageRecords by reference how do we deal with that?
  • We will have to investigate how to handle async
  • We need bindings for the following types:
    • AuthenticatedClient
    • Platform - Start wrapping everything necessary for shell activation for py-rattler #298
    • Channel - add channel types to py-rattler #313
    • RepodataRecord/PackageRecord (we can skip implementing all the fields for now?? maybe it would be nice to be able to access some)
  • fetch_repo_data returns an object that uses a scope to drop a lock. How do we deal with that?
  • Out of scope for now is:
    • the new Gateway implementation unless this lands pretty soon (would simplify the whole API a lot). Might be worth putting some effort in?
    • Download callback is not a requirement but would be nice to have.
• Pass RepodataRecord or PackageRecord to a solver function to solve the environment.
  • @baszalmstra Needs some refining here ...
• Install an environment from a list of RepodataRecords.
  • @baszalmstra Needs more refining here ..

[wolfv]

I am not sure I understand why we need RepodataRecord and friends. We could also decide to hide all that behind the API, right? And just have a "Repodata" object that holds the deserialized repodata?

[baszalmstra]

Yeah I like the idea of a higher level api. But would the repodata hold all records or a selection?

[Wackyator]

AuthenticatedClient, RepoDataRecord, PackageRecord, fetch_repo_data are added now, maybe we should update this a little.

[baszalmstra]

We are closing this in favor of

• Release pipeline for py-rattler release on pypi #356
• Create a py-rattler example tool #355
• Functionality to link the solved dependencies and create an environment in py-rattler #354
• Setup a conda feedstock for py-rattler #357
• Function to solve dependencies in py-rattler #353