gpep517 3

A backend script to aid installing Python packages in Gentoo.

gpep517 is a minimal backend script to aid installing Python packages through PEP 517-compliant build systems. Its main purpose is to supplement Gentoo eclasses with the necessary Python code.

Commands

gpep517 implements three commands:

1. get-backend to read build-backend from pyproject.toml.

2. build-wheel to call the respeective PEP 517 backend in order to produce a wheel.

3. install-wheel to install the wheel into specified directory.

Dependencies

gpep517 aims to minimize the dependency footprint to ease boostrap. At the moment, it depends on two packages:

1. tomli for TOML parsing in Python < 3.11

2. installer for wheel installation

Example

Example use (without error handling):

backend=$(gpep517 get-backend)
mkdir -p build
wheel_name=$(
    gpep517 build-wheel --output-fd 3 --wheel-dir dist \
        --backend "${backend:-setuptools.build_meta:__legacy__}" \
        3>&1 >&2
)
gpep517 install-wheel --destdir install "dist/${wheel_name}"