Cleanup py27 support

This repo is now testing only with Python 3, so let's 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
- Update classifiers
- Update requirements, no need for python_version anymore
- Switch to using sphinx-build. Remove extra build step
  from docs build - api-ref is build separate.
- Cleanup doc/source/conf.py to remove now obsolete content.
- Use newer openstackdocstheme version
- Remove install_command from tox.ini, the default is fine

Change-Id: I7bb95a8ebd7023046baae30595159254bac25690

doc/source/conf.py

@@ -136,21 +136,6 @@ html_theme = 'openstackdocs'
 # directly to the root of the documentation.
 #html_extra_path = []
 
-# If not '', a 'Last updated on:' timestamp is inserted at every page bottom,
-# using the given strftime format.
-#html_last_updated_fmt = '%b %d, %Y'
-git_cmd = ["git", "log", "--pretty=format:%ad, commit %h", "--date=local",
-           "-n1"]
-#try:
-#    html_last_updated_fmt = subprocess.check_output(git_cmd).decode('utf-8')
-#except Exception:
-#    warnings.warn('Cannot get last updated time from git repository. '
-#                  'Not setting "html_last_updated_fmt".')
-html_last_updated_fmt = '%Y-%m-%d %H:%M'
-# If true, SmartyPants will be used to convert quotes and dashes to
-# typographically correct entities.
-#html_use_smartypants = True
-
 # Custom sidebar templates, maps document names to template names.
 #html_sidebars = {}
 

lower-constraints.txt

@@ -31,7 +31,7 @@ monotonic==1.4
 msgpack==0.5.6
 netaddr==0.7.19
 netifaces==0.10.6
-openstackdocstheme==1.18.1
+openstackdocstheme==1.31.2
 os-api-ref==1.4.0
 oslo.cache==1.29.0
 oslo.config==5.2.0

releasenotes/source/conf.py

@@ -34,8 +34,6 @@ repository_name = 'openstack/freezer-api'
 bug_project = 'freezer'
 bug_tag = 'release notes'
 
-html_last_updated_fmt = '%Y-%m-%d %H:%M'
-
 # Add any paths that contain templates here, relative to this directory.
 templates_path = ['_templates']
 

setup.cfg

@@ -9,9 +9,12 @@ author = OpenStack
 author_email = openstack-discuss@lists.openstack.org
 
 home-page = https://docs.openstack.org/freezer/latest/
+python-requires = >=3.6
 classifier =
     Environment :: OpenStack
     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
@@ -37,12 +40,6 @@ classifier =
 packages =
     freezer_api
 
-[build_sphinx]
-source-dir = doc/source
-build-dir = doc/build
-all_files = 1
-warning-is-error = 1
-
 [entry_points]
 oslo.config.opts =
     freezer-api = freezer_api.common.config:list_opts
@@ -62,6 +59,3 @@ freezer.db.backends =
 [pytests]
 where=tests
 verbosity=2
-
-[pbr]
-warnerrors = True

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)

test-requirements.txt

@@ -7,14 +7,12 @@ hacking!=0.13.0,<0.14,>=0.12.0 # Apache-2.0
 coverage!=4.4,>=4.0 # Apache-2.0
 fixtures>=3.0.0 # Apache-2.0/BSD
 oslotest>=3.3.0 # Apache-2.0
-sphinx!=1.6.6,!=1.6.7,!=2.1.0,>=1.6.2;python_version>='3.4' # BSD
+sphinx!=1.6.6,!=1.6.7,!=2.1.0,>=1.6.2 # BSD
 testrepository>=0.0.18 # Apache-2.0/BSD
 testtools>=2.2.0 # MIT
 os-api-ref>=1.4.0 # Apache-2.0
 reno>=2.5.0 # Apache-2.0
-openstackdocstheme>=1.18.1 # Apache-2.0
-astroid==1.6.5;python_version<"3.0" # LGPLv2.1
-astroid==2.1.0;python_version>="3.0" # LGPLv2.1
-pylint==1.9.2;python_version<"3.0" # GPLv2
-pylint==2.3.1;python_version>="3.0" # GPLv2
+openstackdocstheme>=1.31.2 # Apache-2.0
+astroid==2.1.0 # LGPLv2.1
+pylint==2.3.1 # GPLv2
 PyMySQL>=0.7.6 # MIT License

tox.ini

@@ -76,8 +76,7 @@ exclude = .venv,.tox,dist,doc,*egg,specs,build
 [testenv:docs]
 commands =
   rm -rf api-ref/build
-  python setup.py build_sphinx
-  sphinx-build -W -b html api-ref/source api-ref/build/html
+  sphinx-build -W -b html doc/source doc/build/html
 
 [testenv:api-ref]
 whitelist_externals = rm