Bump actions/cache from 3 to 4 #887

	name: Check deps

	on:
	pull_request:
	paths:
	- setup.py
	- requirements.txt
	- dev-requirements.txt
	- docs/requirements.txt
	- .github/workflows/dependencies.yml

	env:
	DEBIAN_FRONTEND: noninteractive

	jobs:
	quality:
	name: Checking dependency graph
	runs-on: ${{ matrix.os }}
	strategy:
	matrix:
	os: ['ubuntu-latest']
	python-version: ['3.8']

	steps:
	- uses: actions/checkout@v4

	- name: Set up Python
	uses: ./.github/actions/python-cache-requirements
	with:
	requirements: dev-requirements.txt

	- name: Install dependencies
	run: \|
	pip3 install -U "pip<24.3" # prevent relative bug path with pip 24.3 and pip-tools
	pip3 install -c dev-requirements.txt pip-tools

	- name: Check dependency graph
	run: \|
	pip-compile -q --strip-extras
	pip-compile -q --strip-extras dev-requirements.in
	pip-compile -q --strip-extras docs/requirements.in

	- name: Verify dependency graph is ok
	uses: tj-actions/verify-changed-files@v20
	id: verify-changed-files
	with:
	files: \|
	requirements.txt
	dev-requirements.txt
	docs/requirements.txt

	- name: Validating graph
	if: steps.verify-changed-files.outputs.files_changed == 'true'
	run: \|
	echo "Dependency file(s) changed: ${{ steps.verify-changed-files.outputs.changed_files }}"
	git diff
	core.setFailed('Please add your new dependencies in setup.py and/or dev-requirements.in then run pip-compile to add them in requirements. (see docs/contribute/development)')

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