[FEA] PyPI package (wheel) release for the cucim.skimage module on non-Linux platforms (Windows, etc.)

[gigony]

Is your feature request related to a problem? Please describe.

There is an increasing number of requests from users who want to use the cucim.skimage module (which depends on CuPy) on other platforms (non-Linux).

• [FEA] Add python/skimage to a conda channel (or pypi) #748
• [FEA] Windows compatibility #454
  • [QST] Installing cucim with pip under python in SideFX Houdini #559
  • [QST]Can not install cuCIM through conda #441
  • Is there a version of cuCIM for (anaconda) Python on windows?[QST] #270
  • [QST] Is it available for OS Win? #86

It would be great if we could release the cucim.skimage portion of the package (e.g., cucim_cu12-24.8.0-py3-none-win_amd64.whl) in the PyPI registry without including the unnecessary/non-supported IO portion (shared libraries) of cuCIM.

• cucim-cu11 · PyPI
• cucim-cu12 · PyPI

Describe the solution you'd like

I believe there is a straightforward way to build and register a Windows Python wheel by updating cucim/ci/build_wheel.sh at branch-24.10 · rapidsai/cucim and register to Windows PyPI package along with the original wheel file (executing this only for a specific build configuration).

# The following will create cucim_cu12-24.6.0-py3-none-win_amd64.whl file.
wheel tags --python-tag=py3 --abi-tag=none --platform-tag=win_amd64 cucim_cu12-24.6.0-cp311-cp311-manylinux_2_28_aarch64.whl

[jakirkham]

We discussed this in the cuCIM meeting today after feedback from RAPIDS OPS. Based on this we revised our plan, which is sketched below

This would split out the Python/C++ bits into pylibcucim and the pure Python bits into pycucim. The cucim package would become a meta package that pulls both in where supported. If the pylibcucim is not supported on a platform (like Windows currently), we would select it out. So users would still install cucim. It would just now work on other platforms not supported today (like Windows) by pulling in the pure Python bits only

The code for cucim-cuXY would look like this

[project]
name = "cucim"
dependencies = [
  "pycucim-cuXY",
  "pylibcucim-cuXY; platform_system == 'Linux'",
]

[jakirkham]

A few more benefits of this approach...

• We can revert the workaround needed to mark the wheels as impure
  • Inform setuptools that Extensions are included #643
  • Fix CI (pt. 2) #680
• Also this would make it easier to explore using scikit-build-core for the C++ & Python bits
  • Evaluate using scikit-build-core #645