Attempt to set up GitHub Actions for testing

.github/workflows/testing.yml

@@ -0,0 +1,104 @@
+name: CI
+
+on:
+  push:
+    branches:
+      - master
+      - v0.*.x
+    tags:
+      - "v*"
+  pull_request:
+
+jobs:
+  tests:
+    name: ${{ matrix.name }}
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+
+          - name: Python 3.7
+            os: ubuntu-latest
+            python: 3.7
+            toxenv: py37
+
+          - name: Python 3.7 with Astropy dev
+            os: ubuntu-latest
+            python: 3.7
+            toxenv: py37-astropydev
+
+          - name: Python 3.8 with code coverage
+            os: ubuntu-latest
+            python: 3.8
+            toxenv: py38-cov
+
+          - name: Python 3.8 with Numpy dev
+            os: ubuntu-latest
+            python: 3.8
+            toxenv: py38-numpydev
+
+          - name: Python 3.9
+            os: ubuntu-latest
+            python: 3.9
+            toxenv: py39
+
+          - name: Python 3.8 (Windows)
+            os: windows-latest
+            python: 3.8
+            toxenv: py38
+            toxposargs: --durations=50
+
+          - name: Python 3.8 (MacOS X)
+            os: macos-latest
+            python: 3.8
+            toxenv: py38
+
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v2
+      with:
+        fetch-depth: 0
+    - name: Set up Python
+      uses: actions/setup-python@v2
+      with:
+        python-version: ${{ matrix.python }}
+    - name: Install language-pack-fr and tzdata
+      if: startsWith(matrix.os, 'ubuntu')
+      run: sudo apt-get install language-pack-fr tzdata
+    - name: Install Python dependencies
+      run: python -m pip install --upgrade tox codecov
+    - name: Run tests
+      run: tox ${{ matrix.toxargs }} -e ${{ matrix.toxenv }} -- ${{ matrix.toxposargs }}
+    - name: Upload coverage to codecov
+      if: ${{ contains(matrix.toxenv,'-cov') }}
+      uses: codecov/codecov-action@v1
+      with:
+        file: ./coverage.xml
+  build-n-publish:
+    name: Build and publish Python 🐍 distributions 📦 to PyPI and TestPyPI
+    runs-on: ubuntu-18.04
+    needs: tests
+    steps:
+    - uses: actions/checkout@master
+    - name: Get history and tags for SCM versioning to work
+      run: |
+        git fetch --prune --unshallow
+        git fetch --depth=1 origin +refs/tags/*:refs/tags/*
+    - name: Set up Python 3.7
+      uses: actions/setup-python@v1
+      with:
+        python-version: 3.7
+    - name: Install requirements
+      run: |
+        pip install --upgrade pip
+        pip install setuptools numpy wheel setuptools_scm
+    - name: Build a binary wheel and a source tarball
+      run: |
+        python setup.py bdist_wheel
+        python setup.py sdist
+    - name: Publish distribution 📦 to PyPI
+      if: startsWith(github.ref, 'refs/tags')
+      uses: pypa/gh-action-pypi-publish@master
+      with:
+        password: ${{ secrets.pypi_access_token }}

LICENSE.md

@@ -1,6 +1,6 @@
 # PlasmaPy-NEI License
 
-Copyright (c) 2020, PlasmaPy-NEI Developers.
+Copyright (c) 2020–2021, PlasmaPy-NEI Developers.
 
 Redistribution and use in source and binary forms, with or without
 modification, are permitted provided that the following conditions are met:

licenses/PlasmaPy_license.md

@@ -1,6 +1,6 @@
 # PlasmaPy License
 
-Copyright (c) 2015-2020, PlasmaPy Developers.
+Copyright (c) 2015-2021, PlasmaPy Developers.
 
 Redistribution and use in source and binary forms, with or without
 modification, are permitted provided that the following conditions are met:

tox.ini

@@ -1,45 +1,44 @@
 [tox]
-envlist =
-    py{37}-test
-    build_docs
-    codestyle
+envlist = py37,build_docs
 isolated_build = True
 
 [testenv]
-# Pass through the following environemnt variables which may be needed for the CI
-passenv = HOME WINDIR LC_ALL LC_CTYPE CC CI TRAVIS
-
-# Run the tests in a temporary directory to make sure that we don't import
-# the package from the source tree
-changedir = .tmp/{envname}
+whitelist_externals=
+    /bin/bash
+    /usr/bin/bash
+changedir = tmp
+setenv =
+    MPLBACKEND = agg
+    COLUMNS = 180
+    PYTEST_COMMAND = pytest --pyargs plasmapy --durations=25 {toxinidir}/docs -n=auto --dist=loadfile --ignore={toxinidir}/docs/conf.py
+extras = all,tests
+deps =
+    numpydev: git+https://github.com/numpy/numpy
+    astropydev: git+https://github.com/astropy/astropy
+    cov: pytest-cov
+    !minimal: pytest-xdist
+    pytest-github-actions-annotate-failures
+commands =
+    !cov: {env:PYTEST_COMMAND} {posargs}
+    cov: {env:PYTEST_COMMAND} {posargs} --cov=plasmapy --cov-config={toxinidir}/setup.cfg
 
-# tox environments are constructued with so-called 'factors' (or terms)
-# separated by hyphens, e.g. test-devdeps-cov. Lines below starting with factor:
-# will only take effect if that factor is included in the environment name. To
-# see a list of example environments that can be run, along with a description,
-# run:
-#
-#     tox -l -v
-#
 description =
     run tests
-
-deps =
-    plasmapydev: git+https://github.com/PlasmaPy/PlasmaPy
-extras =
-    # The following indicates which extras_require from setup.cfg will be installed
-    test
-    alldeps: all
-
-commands =
-    pip freeze
-    pytest --pyargs plasmapy_nei {toxinidir}/docs --cov plasmapy_nei --cov-config={toxinidir}/setup.cfg {posargs}
+    numpydev: with the git master version of numpy
+    astropydev: with the git master version of astropy
+    minimal: with minimal versions of dependencies
+    cov: with code coverage
 
 [testenv:build_docs]
-basepython = python3.7
-changedir = docs
-description = invoke sphinx-build to build the HTML docs
-extras = docs
-commands =
-    pip freeze
-    sphinx-build -W -b html . _build/html {posargs}
+changedir = {toxinidir}
+extras = dev
+setenv =
+    HOME = {envtmpdir}
+commands = sphinx-build docs docs/_build/html -W -b html
+
+[testenv:build_docs_no_examples]
+changedir = {toxinidir}
+extras = dev
+setenv =
+    HOME = {envtmpdir}
+commands = sphinx-build -D nbsphinx_execute='never' docs docs/_build/html -b html