pyproject: Add README.md #9

	name: CI

	on: [push, pull_request]

	jobs:
	test:
	name: Test y4
	runs-on: ubuntu-latest
	steps:
	- name: Checkout
	uses: actions/checkout@v4
	- name: Setup Python
	uses: actions/setup-python@v5
	with:
	python-version: '3.x'
	- name: Install Python prerequisites
	run: \|
	pip install pytest
	- name: Install y4 from checkout
	run: \|
	pip install .
	- name: Run y4 pytests
	run: \|
	pytest tests/

	build:
	name: Build source package
	runs-on: ubuntu-latest
	steps:
	- name: Checkout
	uses: actions/checkout@v4
	- name: Setup Python
	uses: actions/setup-python@v5
	with:
	python-version: '3.x'
	- name: Install hatch
	run: \|
	pip install hatch
	- name: Building using hatch
	run: \|
	hatch build
	- name: Upload artifact
	uses: actions/upload-artifact@v4
	with:
	name: packages
	path: dist/y4-*.tar.gz

	deploy:
	name: Publish release
	runs-on: ubuntu-latest
	if: "startsWith(github.ref, 'refs/tags/v')"
	needs: build
	steps:
	- name: Fetch artifact
	uses: actions/download-artifact@v4
	with:
	name: packages
	path: artifact
	- name: Prepare dist/ directory
	run: \|
	mkdir dist/
	# Get exactly the version that we want to publish.
	version="$(grep -Po '(?<=^refs/tags/v).+$' <<< "$ref")"
	mv "artifact/y4-$version.tar.gz" dist/
	env:
	ref: ${{ github.ref }}
	- name: Publish to PyPI
	uses: pypa/gh-action-pypi-publish@release/v1
	with:
	user: __token__
	password: ${{ secrets.PYPI_API_TOKEN }}

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