Cleanup py27 support

Make 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:
  * Wheel is not needed for python 3 only repo
  * Some other sections are obsolete
- Update classifiers
- Update requirements, no need for python_version anymore

Change-Id: I38ea03576c19cb008f5a07be3527535b4652a4c5

doc/requirements.txt

@@ -1,6 +1,5 @@
 # The order of packages is significant, because pip processes them in the order
 # of appearance. Changing the order has an impact on the overall integration
 # process, which may cause wedges in the gate later.
-sphinx!=1.6.6,!=1.6.7,>=1.6.2,<2.0.0;python_version=='2.7' # BSD
-sphinx!=1.6.6,!=1.6.7,>=1.6.2;python_version>='3.4' # BSD
+sphinx!=1.6.6,!=1.6.7,>=1.6.2 # BSD
 openstackdocstheme>=1.18.1 # Apache-2.0

doc/source/conf.py

@@ -49,7 +49,7 @@ repository_name = 'openstack/renderspec'
 # Sphinx are currently 'default' and 'sphinxdoc'.
 # html_theme_path = ["."]
 # html_theme = '_theme'
-html_static_path = ['static']
+# html_static_path = ['static']
 
 # Output file base name for HTML help builder.
 htmlhelp_basename = '%sdoc' % project

doc/source/usage.rst

@@ -285,7 +285,8 @@ With an existing yaml (and `oslo.config` epoch set to 2), this would be rendered
 
 
 context function `license`
-************************
+**************************
+
 The templates use `SPDX`_ license names and theses names are translated for different distros.
 For example, a project uses the `Apache-2.0` license::
 

setup.cfg

@@ -6,6 +6,7 @@ description-file =
 author = OpenStack
 author-email = openstack-discuss@lists.openstack.org
 home-page = https://docs.openstack.org/renderspec/latest/
+python-requires = >=3.6
 classifier =
     Environment :: Console
     Environment :: OpenStack
@@ -14,15 +15,13 @@ classifier =
     License :: OSI Approved :: Apache Software License
     Operating System :: POSIX :: Linux
     Programming Language :: Python
+    Programming Language :: Python :: Implementation :: CPython
+    Programming Language :: Python :: 3 :: Only
     Programming Language :: Python :: 3
     Programming Language :: Python :: 3.6
     Programming Language :: Python :: 3.7
     Programming Language :: Python :: 3.8
 
-[global]
-setup-hooks =
-    pbr.hooks.setup_hook
-
 [entry_points]
 console_scripts =
     renderspec = renderspec:main
@@ -30,14 +29,3 @@ console_scripts =
 [files]
 packages =
     renderspec
-
-[build_sphinx]
-all_files = 1
-source-dir = doc/source
-build-dir = doc/build
-
-[upload_sphinx]
-upload-dir = doc/build/html
-
-[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>=2.0.0'],
     pbr=True)

tox.ini

@@ -35,5 +35,6 @@ exclude =  .venv,.git,.tox,dist,doc,*lib/python*,*egg,build
 [testenv:docs]
 deps = -r{toxinidir}/doc/requirements.txt
 commands =
-    python setup.py build_sphinx
+  sphinx-build -W -b html doc/source doc/build/html
+