Properly handle empty file field #829

	---

	name: Build
	on:
	push:
	branches: [master]
	pull_request:
	branches: [master]

	jobs:
	build:
	runs-on: ubuntu-20.04
	strategy:
	max-parallel: 5
	matrix:
	python-version: [3.8, 3.9, '3.10', 3.11, 3.12]
	env:
	COVERALLS_REPO_TOKEN: ${{ secrets.COVERALLS_REPO_TOKEN }}

	steps:
	- uses: actions/checkout@v4
	with:
	fetch-depth: 1

	- name: Set up Python ${{ matrix.python-version }}
	uses: actions/setup-python@v5
	with:
	python-version: ${{ matrix.python-version }}
	cache: pip

	- name: Install dependencies
	run: python -m pip install --upgrade pip tox tox-gh-actions

	- name: Run tests
	run: tox

	- name: cache deps
	uses: actions/cache@v4
	with:
	path: ~/.tox
	key: deps-${{ hashFiles('**/pyproject.toml') }}
	restore-keys: deps-${{ hashFiles('**/pyproject.toml') }}

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