Prevent unnecessary refactorisations when matrices haven't changed #1446

	name: Build Gusto

	on:
	# Push to main or PR
	push:
	branches:
	- main
	pull_request:
	schedule:
	# * is a special character in YAML so you have to quote this string
	# Scheduled build at 0330 UTC on Monday mornings to detect bitrot.
	- cron: '30 3 * * 1'

	jobs:
	build:
	name: "Build Gusto"
	# The type of runner that the job will run on
	runs-on: [self-hosted, Linux]
	# The docker container to use.
	container:
	image: firedrakeproject/firedrake-vanilla:latest
	steps:
	- uses: actions/checkout@v4
	- name: Cleanup
	if: ${{ always() }}
	run: \|
	cd ..
	rm -rf build
	- name: Install Gusto
	run: \|
	. /home/firedrake/firedrake/bin/activate
	python -m pip install -r requirements.txt
	python -m pip install -e .
	python -m pip install \
	pytest-timeout pytest-xdist
	- name: Gusto tests
	run: \|
	. /home/firedrake/firedrake/bin/activate
	firedrake-clean
	export GUSTO_PARALLEL_LOG=FILE
	export PYOP2_CFLAGS=-O0
	python -m pytest \
	-n 12 --dist worksteal \
	--durations=100 \
	--timeout=3600 \
	--timeout-method=thread \
	-o faulthandler_timeout=3660 \
	-v unit-tests integration-tests examples
	timeout-minutes: 120
	- name: Prepare logs
	if: always()
	run: \|
	mkdir logs
	cd /tmp/pytest-of-firedrake/pytest-0/
	find . -name "*.log" -exec cp --parents {} /__w/gusto/gusto/logs/ \;
	- name: Upload artifact
	if: always()
	uses: actions/upload-pages-artifact@v3
	with:
	name: log-files
	path: /__w/gusto/gusto/logs
	retention-days: 5

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