Scikit-build Community Meeting #2: 2022-12-16

[jcfr]

Agenda

• Review slides from @henryiii.
• Design questions
• Round table

Attending

• Henry Schreiner (Princeton)
• Matt McCormick (Kitware)
• Jean-Christophe Fillion-Robin (Kitware)
• Jean-Christophe Morin (ASWF)

Presentation Outline

• Scikit-build-core
  • First releases! (0.1.0 - 0.1.4)
  • Conda-forge feedstock up
  • First package out! (AwkwardArray v2)
  • Next plans
• Windows ARM support
• Scikit-build classic
• Design questions
• Round table

Discussion

Slides review notes

• Windows ARM through mac-Mini-like dev system

  • ~$500
  • VS 2022 has working ARM toolchain, cross-compile and build on it
  • Ninja building

• 0.1.4 scikit-build-core works for cross-compiling

• conda-forge support: some issues with feedstock systems for defining CMake generators, an issue in conda-build

• Adoption transition path: scikit-build -> Full PEP 517 scikit-build-core -> scikit-build-core extension build backend

• Next plans:

  • persistent builds: two cases: with/without build isolation
  • setuptools_scm still depends on setuptools, would be nice to remove this and allow it to be used independently.
  • --config-settings support by pip should be revisited. This was discussed during last meeting (see discussion section)

Documentation

• Documentation: for scikit-build, recommends/describes how to use scikit-build-core as a build backend
• scikit-build.github.io repository (backend for scikit-build.org)
  • Pulls in scikit-build and scikit-build-core, examples repository
  • Tracking like cibuildwheel

Persistent build

• Which name for the directory ? Using build is consistent with setuptools but lead to issue when using command like python -m build as it then attempt to use the build directory as build tool.
• the current build does not include the python implementation (pypy vs cpython) and lead to problem when caching directory in the context of CI
• improved naming should be an opt-in

SDK "wheels"

• Naming

  • look into what cypu and how sdk are handled
  • lack of an extra tag
  • suffix -sdk is sensible

• In the context of VTK

  • look into setting up an internal pypy server to avoid overloading pypi
  • convert "sdist" to "whl", currently available at https://vtk.org/files/wheel-sdks/

• @henryiii and @jcfr to work on (re-)adding support to allow (SDK) wheels to update cmake prefix path and ensure find_package calls work as expected.

Projects looking to adopt scikit-build

• Look into supporting this use case: https://github.com/AcademySoftwareFoundation/OpenTimelineIO/blob/main/setup.py#L261

More advertisement for next month's meeting (January 2023)

• Post on GitHub Discussions board
• Email to folks from the grant submission
• Twitter / Mastodon / Fosstodon: henryiii, thewtex