Switch to newer openstackdocstheme and reno versions

Switch to openstackdocstheme 2.2.1 and reno 3.1.0 versions. Using
these versions will allow especially:
* Linking from HTML to PDF document
* Allow parallel building of documents
* Fix some rendering problems

Update Sphinx version as well.

Remove docs requirements from lower-constraints, they are not needed
during install or test but only for docs building.

openstackdocstheme renames some variables, so follow the renames
before the next release removes them. A couple of variables are also
not needed anymore, remove them.

Set openstackdocs_pdf_link to link to PDF file. Note that
the link to the published document only works on docs.openstack.org
where the PDF file is placed in the top-level html directory. The
site-preview places the PDF in a pdf directory.

Set openstackdocs_auto_name to use 'project' as name.

Change pygments_style to 'native' since old theme version always used
'native' and the theme now respects the setting and using 'sphinx' can
lead to some strange rendering.

Change-Id: Ibc90380a5b11a40e8f5adf171416d997f3452bed

doc/requirements.txt

@@ -1,9 +1,7 @@
 # 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,!=2.1.0  # BSD
+sphinx>=2.0.0,!=2.1.0  # BSD
 sphinxcontrib-svg2pdfconverter>=0.1.0 # BSD
-openstackdocstheme>=1.20.0 # Apache-2.0
-doc8>=0.6.0 # Apache-2.0
-oslotest>=3.2.0 # Apache-2.0
-reno>=2.5.0 # Apache-2.0
+openstackdocstheme>=2.2.1 # Apache-2.0
+reno>=3.1.0 # Apache-2.0

doc/source/conf.py

@@ -30,15 +30,16 @@ extensions = [
 ]
 
 # Project cross-reference roles
-openstack_projects = [
+openstackdocs_projects = [
     'neutron',
     'octavia',
 ]
 
 # openstackdocstheme options
-repository_name = 'openstack/ovn-octavia-provider'
-bug_project = 'neutron'
-bug_tag = 'ovn-octavia-provider'
+openstackdocs_repo_name = 'openstack/ovn-octavia-provider'
+openstackdocs_pdf_link = True
+openstackdocs_bug_project = 'neutron'
+openstackdocs_bug_tag = 'ovn-octavia-provider'
 
 # autodoc generation is a bit aggressive and a nuisance when doing heavy
 # text edit cycles.
@@ -58,7 +59,7 @@ add_function_parentheses = True
 add_module_names = True
 
 # The name of the Pygments (syntax highlighting) style to use.
-pygments_style = 'sphinx'
+pygments_style = 'native'
 
 # -- Options for HTML output --------------------------------------------------
 

lower-constraints.txt

@@ -15,7 +15,6 @@ cryptography==2.1
 debtcollector==1.2.0
 decorator==3.4.0
 deprecation==1.0
-doc8==0.6.0
 docutils==0.11
 dogpile.cache==0.6.2
 eventlet==0.18.2
@@ -52,7 +51,6 @@ netifaces==0.10.4
 neutron==15.0.0
 neutron-lib==2.1.0
 octavia-lib==1.3.1
-openstackdocstheme==1.20.0
 openstacksdk==0.11.2
 os-client-config==1.28.0
 os-service-types==1.2.0
@@ -107,7 +105,7 @@ python-novaclient==9.1.0
 python-subunit==1.0.0
 pytz==2015.7
 PyYAML==3.12
-reno==2.5.0
+reno==3.1.0
 repoze.lru==0.7
 requests==2.14.2
 requestsexceptions==1.2.0
@@ -115,8 +113,6 @@ rfc3986==0.3.1
 Routes==2.3.1
 simplejson==3.5.1
 snowballstemmer==1.2.1
-Sphinx==1.6.2
-sphinxcontrib-websupport==1.0.1
 SQLAlchemy==1.2.0
 sqlalchemy-migrate==0.11.0
 sqlparse==0.2.2

releasenotes/source/conf.py

@@ -43,9 +43,10 @@ extensions = [
 ]
 
 # openstackdocstheme options
-repository_name = 'openstack/ovn-octavia-provider'
-bug_project = 'neutron'
-bug_tag = 'ovn-octavia-provider'
+openstackdocs_repo_name = 'openstack/ovn-octavia-provider'
+openstackdocs_bug_project = 'neutron'
+openstackdocs_bug_tag = 'ovn-octavia-provider'
+openstackdocs_auto_name = False
 
 # Add any paths that contain templates here, relative to this directory.
 templates_path = ['_templates']
@@ -92,7 +93,7 @@ exclude_patterns = []
 # show_authors = False
 
 # The name of the Pygments (syntax highlighting) style to use.
-pygments_style = 'sphinx'
+pygments_style = 'native'
 
 # A list of ignored prefixes for module index sorting.
 # modindex_common_prefix = []

tox.ini

@@ -92,10 +92,6 @@ envdir = {toxworkdir}/docs
 deps = -r{toxinidir}/doc/requirements.txt
 commands = sphinx-build -a -E -W -d releasenotes/build/doctrees -b html releasenotes/source releasenotes/build/html
 
-[doc8]
-# File extensions to check
-extensions = .rst
-
 [flake8]
 # W504 line break after binary operator
 ignore = W504