Build CI sdist and wheel #8547

	---
	name: Build CI sdist and wheel

	on:
	# Save CI by only running this on release branches or tags.
	push:
	branches:
	- main
	- v[0-9]+.[0-9]+.x
	tags:
	- v*
	# Also allow running this action on PRs if requested by applying the
	# "Run cibuildwheel" label.
	pull_request:
	types:
	- opened
	- synchronize
	- reopened
	- labeled

	permissions:
	contents: read

	jobs:
	build_sdist:
	if: \|
	github.event_name == 'push' \|\|
	github.event_name == 'pull_request' && (
	(
	github.event.action == 'labeled' &&
	github.event.label.name == 'CI: Run cibuildwheel'
	) \|\|
	contains(github.event.pull_request.labels.*.name, 'CI: Run cibuildwheel')
	)
	name: Build sdist and wheel on ${{ matrix.os }}
	runs-on: ${{ matrix.os }}
	strategy:
	matrix:
	os: [ubuntu-20.04]
	python-version: ['3.8', '3.9', '3.10', '3.11']

	steps:
	- uses: actions/checkout@v3
	with:
	fetch-depth: 0

	- uses: actions/setup-python@v4
	name: Install Python
	with:
	python-version: ${{ matrix.python-version }}

	- name: Install build
	run: pip install build

	- name: Build sdist and wheel
	run: python -m build .

	- name: Install built matplotlib sdist
	run: pip install dist/matplotlib*.tar.gz

	- name: Check version number is not 0
	run: python ./ci/check_version_number.py

	- name: Install built matplotlib wheel
	run: pip install dist/matplotlib*.whl --force-reinstall

	- name: Check version number is not 0
	run: python ./ci/check_version_number.py

	- name: Install twine
	run: pip install twine

	- name: Check README rendering for PyPI
	run: twine check dist/*

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