CLI arg package_file existance is not evaluated on argparse level #34

	---

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

	name: Test Python package

	on: # yamllint disable-line rule:truthy
	push:
	# branches: [ $default-branch ]
	branches-ignore:
	- 'main'
	- 'develop'
	pull_request:
	branches:
	- 'main'
	- 'develop'

	permissions:
	contents: read

	jobs:
	build:
	runs-on: ubuntu-latest
	steps:
	- name: Checkout
	uses: actions/checkout@v6
	- name: Set up Python
	uses: actions/setup-python@v6
	with:
	python-version: '3.9'
	- name: Install test dependencies
	run: \|
	python -m pip install .[dev]
	python -m pip install .[test]
	- name: Lint with flake8
	run: \|
	flake8 .
	- name: Lint with yamllint
	run: \|
	yamllint .
	- name: Test with tox
	run: \|
	python -m tox -e py
	- name: Install deploy dependencies
	run: \|
	if [ -f requirements-deploy.txt ]; then pip install -r requirements-deploy.txt; fi
	pip install .
	- name: Build package
	run: \|
	changelog2version \
	--changelog_file changelog.md \
	--version_file src/setup2upypackage/version.py \
	--version_file_type py \
	--debug
	python -m build .
	- name: Test built package
	run: \|
	twine check dist/*

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