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
- Remove obsolete sections from setup.cfg
- Update requirements, no need for python_version anymore
- Cleanup doc/source/conf.py to remove now obsolete content.
- Use newer openstackdocstheme version
- Remove install_command from tox.ini, the default is fine;
  move contraints into deps
- Move python3 into base tox environment.

Change-Id: Ibd243ce5be8415147c24f596b4059ec3fb68a89c

doc/source/conf.py

@@ -14,7 +14,6 @@
 import os
 import sys
 
-import openstackdocstheme
 
 sys.path.insert(0, os.path.abspath('../..'))
 # -- General configuration ----------------------------------------------------
@@ -31,7 +30,6 @@ extensions = [
 repository_name = 'openstack/manila-image-elements'
 bug_project = 'manila-image-elements'
 bug_tag = 'docs'
-html_last_updated_fmt = '%Y-%m-%d %H:%M'
 
 # autodoc generation is a bit aggressive and a nuisance when doing heavy
 # text edit cycles.
@@ -63,7 +61,6 @@ pygments_style = 'sphinx'
 # Sphinx are currently 'default' and 'sphinxdoc'.
 # html_theme_path = ["."]
 html_theme = 'openstackdocs'
-html_theme_path = [openstackdocstheme.get_html_theme_path()]
 # html_static_path = ['static']
 
 # Output file base name for HTML help builder.

lower-constraints.txt

@@ -15,7 +15,7 @@ Jinja2==2.10
 MarkupSafe==1.0
 mccabe==0.2.1
 networkx==1.11
-openstackdocstheme==1.18.1
+openstackdocstheme==1.31.2
 pbr==2.0.0
 pep8==1.5.7
 pyflakes==0.8.1

setup.cfg

@@ -18,12 +18,3 @@ scripts =
 
 data_files =
     share/manila-elements/elements = elements/*
-
-[build_sphinx]
-all_files = 1
-build-dir = doc/build
-source-dir = doc/source
-warning-is-error = 1
-
-[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)

test-requirements.txt

@@ -6,6 +6,5 @@ bashate>=0.5.1 # Apache-2.0
 hacking>=3.0,<3.1.0 # Apache-2.0
 
 docutils>=0.11 # OSI-Approved Open Source, Public Domain
-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,!=2.1.0,>=1.6.2  # BSD
-sphinx!=1.6.6,!=1.6.7,!=2.1.0,>=1.6.2;python_version>='3.4'  # BSD
+openstackdocstheme>=1.31.2 # Apache-2.0
-openstackdocstheme>=1.18.1 # Apache-2.0

tox.ini

@@ -4,11 +4,12 @@ minversion = 1.6
 skipsdist = True
 
 [testenv]
+basepython = python3
 usedevelop = True
-install_command = pip install -c{env:UPPER_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master} {opts} {packages}
 setenv =
     VIRTUAL_ENV={envdir}
 deps =
+    -c{env:UPPER_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
     -r{toxinidir}/requirements.txt
     -r{toxinidir}/test-requirements.txt
 
@@ -17,22 +18,20 @@ whitelist_externals = bash
 commands = {toxinidir}/tools/run_bashate.sh
 
 [testenv:docs]
-basepython = python3
 commands = sphinx-build -W -d doc/build/doctrees -b html doc/source/ doc/build/html
 
 [testenv:pep8]
-basepython = python3
 commands =
     flake8 {posargs}
     {toxinidir}/tools/run_bashate.sh
 
 [testenv:venv]
-basepython = python3
 commands = {posargs}
 
 [testenv:buildimage]
 commands = manila-image-create {posargs}
 deps =
+    -c{env:UPPER_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
     -r{toxinidir}/requirements.txt
 
 [testenv:buildimage-docker]
@@ -44,7 +43,6 @@ builtins = _
 exclude=.venv,.git,.tox,dist,doc,*openstack/common*,*lib/python*,*egg,tools
 
 [testenv:lower-constraints]
-basepython = python3
 deps =
   -c{toxinidir}/lower-constraints.txt
   -r{toxinidir}/test-requirements.txt