tox

ci: update to `coactions/dynamic-matrix` v3 (latest) #268

	name: tox

	on:
	push:
	branches:
	- main

	pull_request:
	branches:
	- main

	jobs:
	pre:
	name: pre
	runs-on: ubuntu-22.04
	outputs:
	matrix: ${{ steps.generate_matrix.outputs.matrix }}
	steps:
	- name: Determine matrix
	id: generate_matrix
	uses: coactions/matrix@v3
	with:
	other_names: \|
	lint
	packaging
	docs
	build:
	name: ${{ matrix.name }}
	needs: pre
	runs-on: ${{ matrix.os \|\| 'ubuntu-22.04' }}

	strategy:
	fail-fast: false
	matrix: ${{ fromJson(needs.pre.outputs.matrix) }}

	steps:
	- uses: actions/checkout@v3
	with:
	fetch-depth: 0 # needed by setuptools-scm

	- name: Set up Python ${{ matrix.python_version }}
	uses: actions/setup-python@v4
	with:
	python-version: ${{ matrix.python_version }}

	- name: Install dependencies
	run: \|
	python -m pip install --upgrade pip
	pip install tox>=4.0

	- name: ${{ matrix.name }}
	run: ${{ matrix.command }}

	check: # This job does nothing and is only used for the branch protection
	if: always()
	needs:
	- build
	runs-on: ubuntu-22.04
	steps:
	- name: Decide whether the needed jobs succeeded or failed
	uses: re-actors/alls-green@release/v1
	with:
	jobs: ${{ toJSON(needs) }}

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