Cross-platform support

[michaelboyd2]

My goal is to support building OCI (docker) images for a platform other than the host platform.

For reasons related to our tooling (we use Bazel and want hermetic builds), we do not want to do this via running pip install commands on the image itself (as would be normal in a Dockerfile).

The solution we have now is to download wheels for different platforms using pip download --platform. We can then pass the appropriate target depending on which platform we are building for. This method has the downside that we need appropriate wheels to exist for the packages we want to use (this sometimes involves creating our own).

Is there any way to achieve my goal with uv? Support for uv pip download --platform would be sufficient, but it would be ideal to be able to not need the wheels. uv pip install --platform or similar would be even better (no idea if this is at all feasible).

[fullerzz]

I would definitely use uv pip install --platform if implemented! My current use case involves downloading python dependencies with pip install -r requirements.txt --platform manylinux2014_aarch64.

These deps are then zipped and uploaded to AWS as a lambda layer. The lambdas using the layer run on the AWS managed Python 3.11 runtime with ARM architecture.

One of my dependencies is lxml which is what required me to add the --platform manylinux2014_aarch64 option initially.

I'm a big fan of Ruff, so I'm hoping I can start to make use of uv more too.