feat: joj3 re-use issue #164

	# This workflow will install Python dependencies, run tests and lint with a variety of Python versions
	# For more information see: https://help.github.com/actions/language-and-framework-guides/using-python-with-github-actions

	name: Python package

	on: [ push ]

	jobs:
	build:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v2
	- name: Set up Python 3.9
	uses: actions/setup-python@v2
	with:
	python-version: 3.9
	- name: Cache environment
	uses: actions/cache@v2
	id: cache
	with:
	path: ${{ env.pythonLocation }}
	key: ${{ runner.os }}-${{ env.pythonLocation }}-${{ secrets.CACHE_VERSION }}-${{ hashFiles('/setup.py') }}-${{ hashFiles('/requirements.txt') }}
	restore-keys: \|
	${{ runner.os }}-${{ env.pythonLocation }}
	- name: Install dependencies
	if: steps.cache.outputs.cache-hit != 'true'
	run: \|
	python -m pip install --upgrade pip
	- name: Install itself
	run: if [ -f requirements.txt ]; then pip install -e .; fi
	- name: Run --help
	run: joint-teapot --help

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