bug fix #3253

	name: autoblack
	on: [pull_request]

	env:
	PYTHON_VERSION: "3.12.1"

	jobs:
	build:
	runs-on: ubuntu-latest

	steps:
	- uses: actions/checkout@v3
	with:
	ref: ${{ github.event.pull_request.head.ref }}
	repository: ${{ github.event.pull_request.head.repo.full_name }}
	- name: Set up Python ${{ env.PYTHON_VERSION }}
	uses: actions/setup-python@v4
	with:
	python-version: ${{ env.PYTHON_VERSION }}

	- name: Install poetry using pipx
	run: \|
	pipx install poetry
	pipx ensurepath

	- uses: actions/setup-python@v5
	with:
	python-version: "3.12.1"
	cache: "poetry"

	- name: Install dependencies
	run: \|
	poetry config virtualenvs.in-project true
	poetry install --no-interaction --no-root --only linting

	- name: Run Black autoformatter
	run: poetry run black .

	- name: If needed, commit black changes to the pull request
	run: \|
	git config user.name "$(git log -n 1 --pretty=format:%an)"
	git config user.email "$(git log -n 1 --pretty=format:%ae)"
	# short-circuit if we have no changes, otherwise attempt to commit and push
	# should only fail on forks, in which case contributors will need to manually run black, commit, and push
	git diff-index --quiet HEAD \|\| (echo "Attempting to commit changes" && git commit -am 'lint with black' && git push -f)
	- name: Run black --check
	run: poetry run black --check .

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