introduce Ruff formatting #6

	name: format

	on:
	workflow_dispatch:
	push:
	branches:
	- main
	pull_request:
	branches:
	- "**"
	paths-ignore:
	- "docs/**"

	concurrency:
	group: build-format-${{ github.event.pull_request.number \|\| github.ref }}
	cancel-in-progress: true

	jobs:
	ruff-format:
	name: "Formatting checker"
	runs-on: ubuntu-latest
	steps:
	- name: Checkout repo
	uses: actions/checkout@v4
	- name: Set up Python
	uses: actions/setup-python@v4
	with:
	python-version: "3.10"
	- name: Setup virtual environment
	run: \|
	python -m venv .venv
	- name: Install development Python dependencies
	run: \|
	source .venv/bin/activate
	python -m pip install --upgrade pip
	pip install -r dev-requirements.txt
	- name: ruff
	id: ruff
	run: \|
	source .venv/bin/activate
	ruff format --config line-length=100 --diff --exclude "*_pb2.py" src/
	- name: Fail if autopep8 requires changes
	if: steps.autopep8.outputs.exit-code == 2
	run: exit 1

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