Update CI (#1178)

* Using tox-venv no longer necessary

VirtualEnv rewrite should fix compatibility issues

* Update travis conf

- Set os option
- Use Ubuntu bionic
- Remove deprecated sudo flag
- Update 'matrix' to 'jobs'

* Add Python 3.8 to Azure config

* Use tox-factor for tox test env selection

This should fix Azure builds so they don't run all tox test envs.

* Fixup tox Python env factor

.azure_pipelines/azure-pipelines.yml

@@ -4,22 +4,25 @@
 
 strategy:
   matrix:
-    # For some reason, Python 3.4 tries to install Django 2.0 - disabling for now
-    # PY34:
-    #   PYTHON_VERSION: '3.4'
     PY35:
       PYTHON_VERSION: '3.5'
-      TOXENV: django111, django20, django21
+      TOXFACTOR: py35
     PY36:
       PYTHON_VERSION: '3.6'
-    PY36_isort:
-      PYTHON_VERSION: '3.6'
-      TOXENV: isort,lint,docs
-    PY36_warnings:
-      PYTHON_VERSION: '3.6'
-      TOXENV: warnings
+      TOXFACTOR: py36
     PY37:
       PYTHON_VERSION: '3.7'
+      TOXFACTOR: py37
+    PY38:
+      PYTHON_VERSION: '3.8'
+      TOXFACTOR: py38
+
+    PY38_isort:
+      PYTHON_VERSION: '3.8'
+      TOXENV: isort,lint,docs
+    PY38_warnings:
+      PYTHON_VERSION: '3.8'
+      TOXENV: warnings
 
 steps:
 - task: UsePythonVersion@0
@@ -32,12 +35,13 @@ steps:
   displayName: Ensure latest setuptools
 
 - script: |
-    pip install coverage tox tox-venv unittest-xml-reporting
+    pip install coverage tox tox-factor unittest-xml-reporting
   displayName: Install deps
 
 - script: |
     pip --version
-    tox --skip-missing-interpreters true
+    tox --version
+    tox
   displayName: Run tox
 
 - script: |
@@ -67,4 +71,4 @@ steps:
     pip install codecov
     codecov
   displayName: Codecov
-  condition: false
+  condition: false

.travis.yml

@@ -1,25 +1,24 @@
-sudo: false
-
-dist: xenial
+os: linux
+dist: bionic
 language: python
-python:
-  - "3.5"
-  - "3.6"
-  - "3.7"
-  - "3.8"
 
 cache: pip
 
 install:
-  - pip install coverage tox tox-travis tox-venv
+  - pip install coverage tox tox-factor
 
 script:
   - coverage erase
   - tox
 
-matrix:
+jobs:
   fast_finish: true
   include:
+    - { python: "3.5", env: TOXFACTOR=py35 }
+    - { python: "3.6", env: TOXFACTOR=py36 }
+    - { python: "3.7", env: TOXFACTOR=py37 }
+    - { python: "3.8", env: TOXFACTOR=py38 }
+
     - python: "3.8"
       env: TOXENV=isort,lint,docs
     - python: "3.8"

tox.ini

@@ -4,8 +4,8 @@ envlist =
        {py35,py36}-django20,
        {py35,py36,py37}-django21,
        {py35,py36,py37}-django22,
-       {py36,py37,38}-django30,
-       {py36,py37,38}-latest,
+       {py36,py37,py38}-django30,
+       {py36,py37,py38}-latest,
        isort,lint,docs,warnings,