Minimum Dependencies #249

	name: Minimum Dependencies
	# Installs the minimum versions of the dependencies and runs the tests.
	# This test will lower the chance that users botch their installation by
	# only upgrading this project but not the dependencies.

	on:
	push:
	branches:
	- master
	pull_request:
	branches:
	- master

	# Allows you to run this workflow manually from the Actions tab.
	workflow_dispatch:

	# Allow this workflow to be called from other repositories.
	workflow_call:

	schedule:
	- # Run every day at 5:00 UTC.
	- cron: "0 5 * * *"

	jobs:
	build:
	runs-on: ${{ matrix.os }}
	strategy:
	fail-fast: false
	matrix:
	os: [ubuntu-latest, macos-latest, windows-latest]

	steps:
	- uses: actions/checkout@v4
	- name: Set up Python
	uses: actions/setup-python@v5
	with:
	# Keep python-version on the lowest version from pyproject.toml.
	# Also update the regexp below.
	python-version: 3.9
	- name: Install dependencies
	run: \|
	# Hardcode the minimum version of the dependencies.
	# E.g. '"astropy>=4.0"' to '"astropy==4.0"'
	# -i cannot be used because that is hard to get compatible with
	# Linux, MacOS, and Windows.
	# Single quotes are necessary for Windows compatibility.
	sed 's/>=/==/g' pyproject.toml > pyproject.toml.new
	cp pyproject.toml.new pyproject.toml
	# It is difficult to make a regexp that generalizes the Python
	# version and also works Linux, Windows, and MacOS.
	sed 's/==3.9/==3.9.*/g' pyproject.toml > pyproject.toml.new2
	cp pyproject.toml.new2 pyproject.toml
	python -m pip install --upgrade pip
	pip install .[test]
	- name: Run Pytest
	run: pytest

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