more backporting #557

	name: Linux Wheels

	on: [push, pull_request]

	jobs:
	build_wheels:
	name: Build wheels on ${{ matrix.os }}
	runs-on: ${{ matrix.os }}
	strategy:
	matrix:
	os: [ubuntu-20.04]

	steps:
	- uses: actions/checkout@v3

	- uses: actions/setup-python@v3
	name: Install Python
	with:
	python-version: '3.9'

	- name: Install cibuildwheel
	run: \|
	python -m pip install cibuildwheel

	- name: Build wheels
	run: \|
	python -m cibuildwheel --output-dir wheelhouse
	env:
	# Skip Python 2.7, 3.5, 3.11, 32 bit Linux, and PyPy
	CIBW_BUILD: cp312-*
	CIBW_BEFORE_ALL_LINUX: yum install -y tk mesa-libGLU-devel
	CIBW_BEFORE_BUILD: >
	pip install cython FXrays low_index sphinx sphinx_rtd_theme &&
	pip install --pre --extra-index-url https://test.pypi.org/simple cypari &&
	pip install git+https://github.com/3-manifolds/PLink &&
	pip install git+https://github.com/3-manifolds/snappy_manifolds &&
	pip install git+https://github.com/3-manifolds/Spherogram
	CIBW_BEFORE_TEST: >
	pip install cython low_index &&
	pip install --pre --extra-index-url https://test.pypi.org/simple cypari &&
	pip install git+https://github.com/3-manifolds/PLink &&
	pip install git+https://github.com/3-manifolds/snappy_manifolds &&
	pip install git+https://github.com/3-manifolds/Spherogram
	CIBW_REPAIR_WHEEL_COMMAND_LINUX: auditwheel repair --strip -w {dest_dir} {wheel}
	CIBW_TEST_COMMAND: python -m snappy.test --skip-modern-opengl

	- uses: actions/upload-artifact@v3
	with:
	name: snappy_linux_wheels
	path: ./wheelhouse/*.whl

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