add coverage.yml #4

	name: CodeCoverage

	on: [push, pull_request, workflow_dispatch]

	jobs:
	run:
	runs-on: [ubuntu-24.04]

	strategy:
	matrix:
	python-versions: ['3.12']

	steps:
	- uses: actions/checkout@v4
	- name: Set up Python ${{ matrix.python-versions }}
	uses: actions/setup-python@v4
	with:
	python-version: ${{ matrix.python-versions }}
	- name: setup
	run: \|
	sudo apt update && sudo apt install --yes \
	libcdd-dev \
	libgmp-dev \
	numdiff \
	texlive \
	texlive-latex-extra
	python -m pip install --upgrade pip
	pip install pycddlib autograd # this is optional
	pip install coverage
	python --version
	- name: Generate Report
	run: \|
	python -m pip install git+https://github.com/geodynamics/burnman@main
	coverage run -m unittest discover ./tests
	main_coverage=$(coverage report --precision=7 --format=total)
	python -m pip install -q -e .[dev]
	coverage run -m unittest discover ./tests
	coverage report
	new_coverage=$(coverage report --precision=7 --format=total)
	echo "Main coverage: $main_coverage"
	echo "New coverage: $new_coverage"
	if (( $(echo "$new_coverage < $main_coverage" \| bc -l) )); then
	echo "Coverage decreased relative to main"
	exit 1
	fi

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