APKBUILD examples:Python

A lot of Python packages use the setuptools or distutils framework. This mean that the build() and the package() section looks a bit different compared to an application which uses make.

Considerations

pkgname

Package name for a Python library must be prefixed with py3-.

For an 'executable' (for example, black, binwalk), you generally don't need to prefix it.

There’s no exact rule if the prefix should be used for tools and applications written in Python, it varies.

arch

noarch

Use for pure Python packages (i.e. without compiled code). Also add python3 to depends=.

all (and others)

Use for packages with native extensions (i.e. with compiled code). Do not add python3 to depends= (it's auto-detected via dynamic linking to python library).

source

Most Python packages are published in PyPI (the Python Package Index). If the package has a source tarball available in PyPI (that’s true for most packages), and it contains tests (some explicitly remove them from PyPI), you should reference it in source= as:

https://files.pythonhosted.org/packages/source/${_pyname%${_pyname#?}}/$_pyname/$_pyname-$pkgver.tar.gz

where _pyname is the real name of the Python package.

Otherwise, use the normal upstream git tarballs.

Examples

Package for setuptools/setup.py build

If the project has a setup.py, then the APKBUILD is very simple:

pkgname="py3-foo"
_pyname="foo"
...
depends="python3"
makedepends="python3-dev"
checkdepends="py3-pytest"
...

build() {
	python3 setup.py build
}

check() {
	pytest
}

package() {
	python3 setup.py install --skip-build --root="$pkgdir"
}

Note that PyPI tarballs can contain a generated setup.py that does not exist in the upstream repo - this means you must use the pyproject.toml method if you change sources.

Package for pyproject.toml build

pkgname="py-foo"
_pyname="PyFoo"
...
depends="python3 py3-bar py3-baz"
makedepends="py3-build py3-installer python3-dev py3-wheel"
...

build() {
	python3 -m build --no-isolation --wheel
}

check() {
	pytest
}

package() {
	python3 -m installer -d "$pkgdir" \
		dist/PyFoo-$pkgver-py3-none-any.whl
}

Depending on the build-backend in the pyproject.toml, you might need py3-setuptools or py3-flit-core or py3-poetry-core or py3-hatchling at build time.

Sometimes you might have to pass the path to the built package to run tests:

check() {
	python3 -m installer -d testenv \
		dist/PyFoo-$pkgver-py3-none-any.whl
	local sitedir="$(python3 -c 'import site;print(site.getsitepackages()[0])')"
	PYTHONPATH="$PWD/testenv/$sitedir" pytest
}