Black and workflow rework #2

	---
	name: 'Python formatting linter (Black)'

	on:
	workflow_dispatch:
	pull_request:
	branches:
	- main

	permissions:
	contents: read
	pull-requests: read

	# This allows a subsequently queued workflow run to interrupt previous runs
	concurrency:
	group: '${{ github.workflow }} @ ${{ github.event.pull_request.head.label \|\| github.head_ref \|\| github.ref }}'
	cancel-in-progress: true

	jobs:
	check-black:
	runs-on: ${{ fromJSON('["ubuntu-latest", "self-hosted"]')[github.repository == 'github/docs-internal'] }}
	steps:
	- name: Set up Python
	uses: actions/setup-python@v3
	with:
	python-version: ${{ inputs.python }}

	- name: Checkout
	uses: actions/checkout@v3
	with:
	fetch-depth: 0
	ref: ${{ github.event.pull_request.head.sha }}

	- name: Install black
	shell: bash
	run: \|
	pip install black

	- name: Run black
	shell: bash
	run: \|
	black --check --diff --color

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