NumPy Pixi packages

This directory contains definitions for Pixi packages which can be built from the NumPy source code.

Downstream developers can make use of these packages by adding them as Git dependencies in a Pixi workspace, like:

toml

[dependencies]
numpy = { git = "https://github.com/numpy/numpy", subdirectory = "pixi-packages/asan" }

This is particularly useful when developers need to build NumPy from source (for example, for an ASan-instrumented build), as it does not require any manual clone or build steps. Instead, Pixi will automatically handle both the build and installation of the package.

See https://github.com/scipy/scipy/pull/24066 for a full example of downstream use.

Each package definition is contained in a subdirectory. Currently defined package variants:

default
asan: ASan-instrumented build with -Db_sanitize=address

Maintenance

Keep host dependency requirements up to date
For dependencies on upstream CPython Pixi packages, keep the git revision at a compatible version

Opportunities for future improvement

More package variants (such as TSan, UBSan)
Support for Windows
Using a single pixi.toml for all package variants is blocked on https://github.com/prefix-dev/pixi/issues/2813
Consider pinning dependency versions to guard against upstream breakages over time