ci: add a Python dev workflow

.github/workflows/bleeding-edge.yaml

@@ -0,0 +1,53 @@
+name: CI (bleeding edge)
+# this workflow is heavily inspired from pandas, see
+# https://github.com/pandas-dev/pandas/blob/master/.github/workflows/python-dev.yml
+
+# goals: check stability against
+# - dev version of Python, numpy, and matplotlib
+# - building with future pip default options
+
+on:
+  push:
+    branches:
+      - main
+  schedule:
+    # run this every day at 3 am UTC
+    - cron: '0 3 * * *'
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    name: actions-310-dev
+    timeout-minutes: 60
+
+    concurrency:
+      group: ${{ github.ref }}-dev
+      cancel-in-progress: true
+
+    steps:
+    - uses: actions/checkout@v2
+      with:
+        fetch-depth: 0
+
+    - name: Set up Python Dev Version
+      uses: actions/setup-python@v2
+      with:
+        python-version: '3.10-dev'
+
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip setuptools wheel
+        python -m pip install git+https://github.com/numpy/numpy.git
+        python -m pip install git+https://github.com/matplotlib/matplotlib.git
+        python -m pip install cython
+
+    - name: Build yt
+      # --no-build-isolation is used to guarantee that build time dependencies
+      # are not installed by pip as specified from pyproject.toml, hence we get
+      # to use the dev version of numpy at build time.
+      run: |
+        python setup.py build_ext -q -j2
+        python -m pip install -e .[test] --no-build-isolation
+
+    - name: Run Tests
+      run: pytest -vvv

.github/workflows/build-test-pytest.yaml

@@ -1,6 +1,13 @@
 name: Build and Test
 
-on: [push, pull_request]
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    paths-ignore:
+      - "doc/**"
+      - README.md
 
 defaults:
   run:

.github/workflows/build-test.yaml

@@ -1,6 +1,13 @@
 name: Build and Test
 
-on: [push, pull_request]
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    paths-ignore:
+      - "doc/**"
+      - README.md
 
 defaults:
   run:

README.md

@@ -10,6 +10,7 @@
 
 <!--- Tests and style --->
 ![Build and Test](https://github.com/yt-project/yt/workflows/Build%20and%20Test/badge.svg?branch=main)
+[![CI (bleeding edge)](https://github.com/yt-project/yt/actions/workflows/bleeding-edge.yaml/badge.svg)](https://github.com/yt-project/yt/actions/workflows/bleeding-edge.yaml)
 [![pre-commit.ci status](https://results.pre-commit.ci/badge/github/yt-project/yt/main.svg)](https://results.pre-commit.ci/latest/github/yt-project/yt/main)
 [![Code style: black](https://img.shields.io/badge/code%20style-black-000000.svg)](https://github.com/psf/black)
 [![Imports: isort](https://img.shields.io/badge/%20imports-isort-%231674b1?style=flat&labelColor=ef8336)](https://pycqa.github.io/isort/)

setup.cfg

@@ -38,7 +38,7 @@ project_urls =
 packages = find:
 install_requires =
     iPython>=1.0
-    matplotlib!=3.4.2,>=2.0.2,<3.5
+    matplotlib!=3.4.2,>=2.0.2,<3.6.0
     more-itertools>=8.4
     numpy>=1.13.3
     pyyaml>=4.2b1

tests/windows_conda_requirements.txt

@@ -2,5 +2,5 @@ numpy>=1.19.4
 cython>=0.29.21
 cartopy~=0.18.0
 h5py~=3.1.0
-matplotlib<3.5
+matplotlib>=2.0.2,<3.6.0
 scipy~=1.5.0