Using uv-build backend instead of Hatch?

[yann-combarnous]

Hi,

According to doc, uv setup requires to use Hatch as backend.

Now that uv supports uv-build backend, will it also be supported by Polylith?

thx

[DavidVujic]

I had a quick look the other day, and the uv build backend doesn’t seem to have support for hooks or plugins yet. But it should be possible to use with Polylith. There’s “before” and “after” commands in the poly tool for backends without hooks support. Have a look at the docs for Polylith with Maturin for example usage: https://davidvujic.github.io/python-polylith-docs/deployment/#maturin_1 It should be enough to run the poly commands before and after “uv build” in the same way as for Maturin or Pixi. You probably also want something equivalent in uv to the hatch dev paths specified at the root-level pyproject.toml, to make uv recognize the namespaces during development. Other than that, I don’t think it’s anything else needed.