Update CI. #45

	name: build

	on: [push, pull_request]

	jobs:
	build:
	runs-on: ubuntu-20.04
	strategy:
	fail-fast: false
	matrix:
	python-version: ["3.7", "3.8", "3.9", "3.10", "3.11", "3.12"]
	steps:
	- uses: actions/checkout@v4
	- uses: actions/setup-python@v5
	with:
	python-version: ${{ matrix.python-version }}
	- name: Install
	run: \|
	python -mpip install --upgrade pip setuptools wheel pytest pytest-cov
	case '${{ matrix.python-version }}' in
	3.7)
	pip install ipython==4.1.0;;
	esac
	python -mpip install .
	- name: Test
	run: \|
	python -mpytest --cov --cov-branch
	- name: Upload coverage
	uses: actions/upload-artifact@v4
	with:
	name: coverage-${{ matrix.python-version }}
	include-hidden-files: true
	path: .coverage.*

	coverage:
	runs-on: ubuntu-latest
	needs: build
	steps:
	- uses: actions/checkout@v4
	- uses: actions/setup-python@v5
	with:
	python-version: "3.12"
	- name: Coverage
	run: \|
	shopt -s globstar &&
	GH_TOKEN=${{ secrets.GITHUB_TOKEN }} \
	gh run download ${{ github.run-id }} -p 'coverage-*' &&
	python -mpip install --upgrade coverage &&
	python -mcoverage combine coverage-* && # Unifies paths across envs.
	python -mcoverage annotate &&
	for f in */,cover; do
	if ! grep -q '^!' "$f"; then
	continue
	fi
	echo "$f" &&
	grep -nTC2 '^!' "$f"
	done &&
	python -mcoverage report --show-missing

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