Refresh CI setup

Migrate from Circle to GitHub Actions.
Drop python 2 configurations from testing.

.github/workflows/docs.yml

@@ -0,0 +1,26 @@
+name: Publish docs
+
+on:
+  push:
+    branches:
+      - master
+  workflow_dispatch: {}
+
+jobs:
+  docs:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Setup Python
+        uses: actions/setup-python@v2
+        with:
+          python-version: 3.8
+      - name: Install Tox
+        run: pip install tox
+      - name: Run Tox
+        run: tox -e docs
+      - name: Publish
+        uses: JamesIves/[email protected]
+        with:
+          branch: gh-pages
+          folder: docs/_build/html

.github/workflows/release.yml

@@ -0,0 +1,27 @@
+name: Publish on PyPI
+
+on:
+  push:
+    tags:
+      - v*
+
+jobs:
+  deploy:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Set up Python
+        uses: actions/setup-python@v2
+        with:
+          python-version: "3.8"
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install setuptools wheel twine
+      - name: Build and publish
+        env:
+          TWINE_USERNAME: __token__
+          TWINE_PASSWORD: ${{ secrets.PYPI_PASSWORD }}
+        run: |
+          python setup.py sdist bdist_wheel
+          twine upload dist/*

.github/workflows/tests.yml

@@ -0,0 +1,34 @@
+name: Tests
+
+on:
+  pull_request: {}
+  push:
+    branches:
+      - master
+
+jobs:
+  tox:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: true
+      matrix:
+        tox_env: [tests, static, docs, pidiff]
+        py: [3.11]
+        exclude:
+          - tox_env: static # FIXME: not currently working
+            py: 3.11
+        include:
+          - tox_env: tests # oldest py3 version for testing
+            py: 3.8
+          - tox_env: static # see above FIXME
+            py: 3.8
+    steps:
+      - uses: actions/checkout@v2
+      - name: Setup Python
+        uses: actions/setup-python@v2
+        with:
+          python-version: ${{ matrix.py }}
+      - name: Install Tox
+        run: pip install tox
+      - name: Run Tox
+        run: tox -e ${{ matrix.tox_env }}

tox.ini

@@ -1,40 +1,22 @@
 [tox]
-envlist = py26,py27,py36,py37,py38,static,docs,pidiff
+envlist = tests,static,docs,pidiff
 
 [testenv]
-passenv = COVERALLS_REPO_TOKEN CIRCLECI CIRCLE_* CI_PULL_REQUEST
 deps=
   -rrequirements.txt
   -rtest-requirements.txt
 commands=
   pytest --cov-report=html --cov=more_executors -v \
     --junit-xml=test-results/more_executors/junit.xml {posargs}
-whitelist_externals=sh
-
-[testenv:py26]
-# no dependency pinning on python2
-deps=
-  -rtest-requirements.in
-basepython=python2.6
-# For python 2.6, we'll avoid having coverage enabled
-# because it slows down the execution a lot
-commands=
-  pytest -v \
-    --junit-xml=test-results/more_executors/junit.xml {posargs}
-
-[testenv:py27]
-deps=
-  -rtest-requirements.in
-  prometheus-client==0.9.0
-basepython=python2.7
+allowlist_externals=sh
 
 [testenv:static]
 commands=
 	sh -c 'pylint more_executors tests; test $(( $? & (1|2|4|32) )) = 0'
 
 [testenv:docs]
 deps=-rdocs-requirements.txt
-whitelist_externals=sh
+allowlist_externals=sh
 use_develop=true
 commands=
 	sh -c '\
@@ -49,19 +31,19 @@ commands=
 	pidiff more-executors .
 
 [testenv:revdep-pulplib]
-whitelist_externals=sh
+allowlist_externals=sh
 use_develop=true
 commands=
 	sh -c 'scripts/revdep-test https://github.com/release-engineering/pubtools-pulplib.git'
 
 [testenv:revdep-fastpurge]
-whitelist_externals=sh
+allowlist_externals=sh
 use_develop=true
 commands=
 	sh -c 'scripts/revdep-test https://github.com/release-engineering/python-fastpurge.git'
 
 [testenv:revdep-ubipop]
-whitelist_externals=sh
+allowlist_externals=sh
 use_develop=true
 commands=
 	sh -c 'scripts/revdep-test https://github.com/release-engineering/ubi-population-tool.git'