[bashtage]

Each ubuntu-latest job built three wheels for its Python version in a row: manylinux x86_64, manylinux aarch64 under QEMU emulation and musllinux x86_64. In the run of 5 November the Linux jobs took 35 to 66 minutes, all other jobs at most 24 minutes, and one job status covered three wheels.

Changes

• manylinux aarch64 is built natively on the ubuntu-24.04-arm runner, and CIBW_ARCHS_LINUX is native, so no wheel is built under emulation. The QEMU setup step is removed.
• New variant dimension in the matrix (default, musllinux). The musllinux variant of ubuntu-latest builds only the musllinux x86_64 wheel (CIBW_SKIP skips the manylinux wheels), and every other job skips musllinux wheels, as before for aarch64. The extra variants of the other operating systems are excluded.
• The musllinux job is named ubuntu-latest, Python cp313, musllinux; the other job names are unchanged, and ubuntu-24.04-arm, Python cp313 is new.

The set of wheels is unchanged. A simulation of the matrix rules of GitHub Actions on the old file gives the 38 jobs of that run; on the new file it gives 54 jobs that each select exactly one wheel, the same 54 wheels (the run had 30 jobs with one wheel and 8 with three).

Not changed

• Tests are still skipped for aarch64 (CIBW_TEST_SKIP), as for the emulated build. The native runner could run them.
• The upload steps are untouched. Each job now uploads one wheel.

Not verified

• The workflow has not run on GitHub. In particular, the pwsh step and setup-miniconda on ubuntu-24.04-arm are untested (the setup-miniconda README lists Linux ARM as supported), and so is the build of manylinux aarch64 on the ARM runner.

Written with Claude Code (Claude Sonnet 5.5).

🤖 Generated with Claude Code