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_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.

See also
http://lists.openstack.org/pipermail/openstack-discuss/2020-May/014971.html

Change-Id: I82da7f4ff91e28bf60791b93154a3a1d20fe03f1

doc/requirements.txt

@@ -1,6 +1,6 @@
 # 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 # BSD
-openstackdocstheme>=1.18.1 # Apache-2.0
-reno>=2.5.0 # Apache-2.0
+sphinx>=2.0.0,!=2.1.0 # BSD
+openstackdocstheme>=2.2.1 # Apache-2.0
+reno>=3.1.0 # Apache-2.0

doc/source/conf.py

@@ -47,7 +47,7 @@ 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 --------------------------------------------------
 
@@ -61,11 +61,6 @@ html_theme = 'openstackdocs'
 # Output file base name for HTML help builder.
 htmlhelp_basename = '%sdoc' % project
 
-# 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'
-html_last_updated_fmt = '%Y-%m-%d %H:%M'
-
 # Grouping the document tree into LaTeX files. List of tuples
 # (source start file, target name, title, author, documentclass
 # [howto/manual]).
@@ -80,6 +75,6 @@ latex_documents = [
 #intersphinx_mapping = {'http://docs.python.org/': None}
 
 # -- Options for openstackdocstheme -------------------------------------------
-repository_name = 'openstack/python-brick-cinderclient-ext'
-bug_project = 'python-brick-cinderclient-ext'
-bug_tag = ''
+openstackdocs_repo_name = 'openstack/python-brick-cinderclient-ext'
+openstackdocs_bug_project = 'python-brick-cinderclient-ext'
+openstackdocs_bug_tag = ''

lower-constraints.txt

@@ -34,7 +34,6 @@ mox3==0.25.0
 msgpack==0.5.6
 netaddr==0.7.19
 netifaces==0.10.6
-openstackdocstheme==1.20.0
 os-brick==2.5.0
 os-client-config==1.29.0
 os-testr==1.0.0
@@ -66,7 +65,6 @@ python-mimeparse==1.6.0
 python-subunit==1.2.0
 pytz==2018.3
 PyYAML==3.12
-reno==2.7.0
 repoze.lru==0.7
 requests==2.18.4
 requestsexceptions==1.4.0
@@ -76,8 +74,6 @@ Routes==2.4.1
 simplejson==3.13.2
 six==1.11.0
 snowballstemmer==1.2.1
-Sphinx==1.6.5
-sphinxcontrib-websupport==1.0.1
 stestr==1.0.0
 stevedore==1.28.0
 testscenarios==0.4

releasenotes/source/conf.py

@@ -92,7 +92,7 @@ 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 = []
@@ -141,10 +141,6 @@ html_static_path = ['_static']
 # 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'
-
 # If true, SmartyPants will be used to convert quotes and dashes to
 # typographically correct entities.
 # html_use_smartypants = True
@@ -188,7 +184,6 @@ htmlhelp_basename = 'BrickCinderclientExtNotesdoc'
 # 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'
-html_last_updated_fmt = '%Y-%m-%d %H:%M'
 
 # -- Options for LaTeX output ---------------------------------------------
 
@@ -276,6 +271,7 @@ texinfo_documents = [
 locale_dirs = ['locale/']
 
 # -- Options for openstackdocstheme -------------------------------------------
-repository_name = 'openstack/python-brick-cinderclient-ext'
-bug_project = 'python-brick-cinderclient-ext'
-bug_tag = ''
+openstackdocs_repo_name = 'openstack/python-brick-cinderclient-ext'
+openstackdocs_bug_project = 'python-brick-cinderclient-ext'
+openstackdocs_bug_tag = ''
+openstackdocs_auto_name = False