Cleanup py27 support

Py27 is dead, let's do a few cleanups:
- Remove python 2.7 stanza from setup.py
- Add requires on python >= 3.6 to setup.cfg so that pypi and pip
  know about the requirement
- Remove obsolete sections from setup.cfg
- Update classifiers
- Switch to using sphinx-build and openstackdocstheme, update
  versions of tools
- Remove install_command from tox.ini, the default is fine
- Remove babel.cfg, it's not used
- Update to hacking 3.0

Change-Id: I21c89e05a33ce614f1af5288433a993b599e0a35

babel.cfg

@@ -1,2 +0,0 @@
-[python: **.py]
-

doc/source/conf.py

@@ -23,7 +23,7 @@ sys.path.insert(0, os.path.abspath('../..'))
 extensions = [
     'sphinx.ext.autodoc',
     #'sphinx.ext.intersphinx',
-    'oslosphinx'
+    'openstackdocstheme'
 ]
 
 # autodoc generation is a bit aggressive and a nuisance when doing heavy
@@ -55,7 +55,7 @@ pygments_style = 'sphinx'
 # The theme to use for HTML and HTML Help pages.  Major themes that come with
 # Sphinx are currently 'default' and 'sphinxdoc'.
 # html_theme_path = ["."]
-# html_theme = '_theme'
+html_theme = 'openstackdocs'
 # html_static_path = ['static']
 
 # Output file base name for HTML help builder.

releasenotes/source/conf.py

@@ -38,7 +38,7 @@
 # extensions coming with Sphinx (named 'sphinx.ext.*') or your custom
 # ones.
 extensions = [
-    'oslosphinx',
+    'openstackdocstheme',
     'reno.sphinxext',
 ]
 
@@ -109,7 +109,7 @@ pygments_style = 'sphinx'
 
 # The theme to use for HTML and HTML Help pages.  See the documentation for
 # a list of builtin themes.
-html_theme = 'default'
+html_theme = 'openstackdocs'
 
 # Theme options are theme-specific and customize the look and feel of a theme
 # further.  For a list of options available for each theme, see the

setup.cfg

@@ -5,7 +5,8 @@ description-file =
     README.rst
 author = OpenStack
 author-email = openstack-discuss@lists.openstack.org
-home-page = http://www.openstack.org/
+home-page = https://www.openstack.org/
+python-requires = >=3.6
 classifier =
     Environment :: OpenStack
     Intended Audience :: Information Technology
@@ -13,36 +14,13 @@ classifier =
     License :: OSI Approved :: Apache Software License
     Operating System :: POSIX :: Linux
     Programming Language :: Python
-    Programming Language :: Python :: 2
+    Programming Language :: Python :: Implementation :: CPython
-    Programming Language :: Python :: 2.7
+    Programming Language :: Python :: 3 :: Only
     Programming Language :: Python :: 3
-    Programming Language :: Python :: 3.5
+    Programming Language :: Python :: 3.6
+    Programming Language :: Python :: 3.7
+    Programming Language :: Python :: 3.8
 
 [files]
 packages =
     release_test
-
-[build_sphinx]
-source-dir = doc/source
-build-dir = doc/build
-all_files = 1
-
-[upload_sphinx]
-upload-dir = doc/build/html
-
-[compile_catalog]
-directory = release-test/locale
-domain = release-test
-
-[update_catalog]
-domain = release-test
-output_dir = release-test/locale
-input_file = release-test/locale/release-test.pot
-
-[extract_messages]
-keywords = _ gettext ngettext l_ lazy_gettext
-mapping_file = babel.cfg
-output_file = release-test/locale/release-test.pot
-
-[wheel]
-universal = 1

setup.py

@@ -13,17 +13,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-# THIS FILE IS MANAGED BY THE GLOBAL REQUIREMENTS REPO - DO NOT EDIT
 import setuptools
 
-# In python < 2.7.4, a lazy loading of package `pbr` will break
-# setuptools if some other modules registered functions in `atexit`.
-# solution from: http://bugs.python.org/issue15881#msg170215
-try:
-    import multiprocessing  # noqa
-except ImportError:
-    pass
-
 setuptools.setup(
     setup_requires=['pbr'],
     pbr=True)

test-requirements.txt

@@ -2,15 +2,14 @@
 # of appearance. Changing the order has an impact on the overall integration
 # process, which may cause wedges in the gate later.
 
-hacking<0.11,>=0.10.0
+hacking<3.1.0,>=3.0.0
 
 coverage>=3.6
 python-subunit>=0.0.18
-sphinx!=1.6.6,!=1.6.7,>=1.6.2,<2.0.0;python_version=='2.7' # BSD
+sphinx!=2.1.0,>=2.0.0 # BSD
-sphinx!=1.6.6,!=1.6.7,!=2.1.0,>=1.6.2;python_version>='3.4' # BSD
+openstackdocstheme>=2.0.0 # Apache-2.0
-oslosphinx>=2.5.0 # Apache-2.0
+reno>=2.5.0 # Apache2
 oslotest>=1.10.0 # Apache-2.0
 stestr>=2.0.0 # Apache-2.0
 testscenarios>=0.4
 testtools>=1.4.0
-reno>=0.1.1 # Apache2

tox.ini

@@ -1,32 +1,25 @@
 [tox]
 minversion = 2.0
 distribute = False
-envlist = py35,py27,pep8
+envlist = py36,pep8
 
 [testenv]
 basepython = python3
-install_command = pip install {opts} {packages}
 deps =
-  -c{env:UPPER_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
+  -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
   -r{toxinidir}/test-requirements.txt
   -r{toxinidir}/requirements.txt
 commands =
   python setup.py test --coverage --coverage-package-name=oslo_config --slowest {posargs}
   coverage report --show-missing
 
-[testenv:py27]
-basepython = python2.7
-
 [testenv:pep8]
-basepython = python3
 commands = flake8 {posargs}
 
 [testenv:venv]
-basepython = python3
 commands = {posargs}
 
 [testenv:cover]
-basepython = python3
 setenv =
    {[testenv]setenv}
    PYTHON=coverage run --source release_test --parallel-mode
@@ -37,15 +30,12 @@ commands =
    coverage xml -o cover/coverage.xml
 
 [testenv:docs]
-basepython = python3
+commands = sphinx-build -W -b html doc/source doc/build/html
-commands = python setup.py build_sphinx
 
 [testenv:debug]
-basepython = python3
 commands = oslo_debug_helper {posargs}
 
 [testenv:releasenotes]
-basepython = python3
 commands = sphinx-build -a -E -W -d releasenotes/build/doctrees -b html releasenotes/source releasenotes/build/html
 
 [flake8]