GH action lint: check with darker iso black #57

	name: Lint

	on:
	push:
	branches: [ main ]
	pull_request:
	branches: [ main ]

	jobs:
	lint:
	name: "Lint: code quality and formatting checks"
	runs-on: ubuntu-latest
	steps:
	- name: Clone repo
	uses: actions/checkout@v2
	- name: Set up python
	uses: actions/setup-python@v4
	with:
	python-version: 3.9
	cache: 'pip'
	- name: Install Python dependencies
	run: \|
	python -m pip install --upgrade pip
	python -m pip install isort ruff 'darker==1.7.2'
	- name: isort
	run: python -m isort . --check --diff
	- name: ruff
	run: ruff check .
	- name: darker
	# For now, run "darker" (iso "black")
	# to only check formatting of edited/new code
	# TODO: consider using the official action `uses: akaihola/darker@...`
	# as documented on https://github.com/akaihola/darker/blob/master/README.rst
	run: python -m darker --check --diff -r 'master...' .

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