Support Python's build-in module venv for virtual environments additionally to Conda #5

	name: Check Python venv virtual environment

	on:
	pull_request:
	branches:
	- main
	# Only watch changes related to Python virtual environment venv
	paths:
	- 'requirements.txt'
	- 'scripts/activatePythonEnvironment.sh'
	- '.github/workflows/internal-check-python-venv-support.yml' # or when this file changed

	jobs:
	check-python-venv-environment:
	runs-on: ubuntu-latest
	strategy:
	matrix:
	include:
	- os: ubuntu-22.04
	python: 3.12

	steps:
	- name: Checkout GIT Repository
	uses: actions/checkout@v4

	- name: (Python Setup) Use version ${{ matrix.python }} with venv environment management module
	uses: actions/setup-python@v5
	with:
	python-version: ${{ matrix.python }}
	cache: 'pip'

	- name: Create, activate, install and check virtual environment
	env:
	USE_VIRTUAL_PYTHON_ENVIRONMENT_VENV: "true"
	# 1. Run the script under test to create, activate and install the virtual environment
	# 2a. Run pip in dry-run mode without installing or resolving dependencies
	# 2b. Suppress all pip output (stderr)
	# 2c. Check if pip would install anything using grep
	# 2d. If there are missing dependencies and the environment is incomplete, return 1 (indicates all requirements already satisfied)
	run: \|
	./scripts/activatePythonEnvironment.sh
	pip install --dry-run --no-deps --requirement "./requirements.txt" 2>/dev/null \| grep -q "Would install" \|\| return 1

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