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.

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

Change-Id: I1d02403727831c29f3a38cfc11949325614ac7d0

doc/requirements.txt

@@ -1,7 +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.
-openstackdocstheme>=1.32.1 # Apache-2.0
-sphinx!=1.6.6,!=1.6.7,>=1.6.2,!=2.1.0  # BSD
-reno>=2.5.0 # Apache-2.0
+openstackdocstheme>=2.2.1 # Apache-2.0
+sphinx>=2.0.0,!=2.1.0 # BSD
+reno>=3.1.0 # Apache-2.0
 sphinxcontrib-programoutput>=0.11  # BSD

doc/source/conf.py

@@ -16,8 +16,6 @@
 import os
 import sys
 
-import openstackdocstheme
-
 # If extensions (or modules to document with autodoc) are in another directory,
 # add these directories to sys.path here. If the directory is relative to the
 # documentation root, use os.path.abspath to make it absolute, like shown here.
@@ -43,7 +41,6 @@ source_suffix = '.rst'
 master_doc = 'index'
 
 # General information about the project.
-project = u'python-manilaclient'
 copyright = u'Rackspace, based on work by Jacob Kaplan-Moss'
 
 # List of directories, relative to source directory, that shouldn't be searched
@@ -58,19 +55,19 @@ 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 --------------------------------------------------
 
 # Output file base name for HTML help builder.
 htmlhelp_basename = 'python-manilaclientdoc'
 html_theme = 'openstackdocs'
-html_theme_path = [openstackdocstheme.get_html_theme_path()]
 
 # openstackdocstheme options
-repository_name = 'openstack/python-manilaclient'
-bug_project = 'python-manilaclient'
-bug_tag = 'docs'
+openstackdocs_repo_name = 'openstack/python-manilaclient'
+openstackdocs_pdf_link = True
+openstackdocs_bug_project = 'python-manilaclient'
+openstackdocs_bug_tag = 'docs'
 
 # -- Options for LaTeX output -------------------------------------------------
 

lower-constraints.txt

@@ -36,7 +36,6 @@ msgpack-python==0.4.0
 munch==2.1.0
 netaddr==0.7.18
 netifaces==0.10.4
-openstackdocstheme==1.32.1
 openstacksdk==0.11.2
 os-client-config==1.28.0
 os-service-types==1.2.0
@@ -70,16 +69,12 @@ python-openstackclient==3.12.0
 python-subunit==1.0.0
 pytz==2013.6
 PyYAML==3.12
-reno==2.5.0
 requests==2.14.2
 requestsexceptions==1.2.0
 rfc3986==0.3.1
 simplejson==3.5.1
 six==1.10.0
 snowballstemmer==1.2.1
-Sphinx==1.6.5
-sphinxcontrib-websupport==1.0.1
-sphinxcontrib-programoutput==0.11
 stestr==1.0.0
 stevedore==1.20.0
 tempest==17.1.0

releasenotes/source/conf.py

@@ -30,8 +30,6 @@
 
 # -- General configuration ------------------------------------------------
 
-import openstackdocstheme
-
 # If your documentation needs a minimal Sphinx version, state it here.
 # needs_sphinx = '1.0'
 
@@ -44,10 +42,10 @@ extensions = [
 ]
 
 # openstackdocstheme options
-repository_name = 'openstack/python-manilaclient'
-bug_project = 'python-manilaclient'
-bug_tag = 'release notes'
-html_last_updated_fmt = '%Y-%m-%d %H:%M'
+openstackdocs_repo_name = 'openstack/python-manilaclient'
+openstackdocs_bug_project = 'python-manilaclient'
+openstackdocs_bug_tag = 'release notes'
+openstackdocs_auto_name = False
 
 # Add any paths that contain templates here, relative to this directory.
 templates_path = ['_templates']
@@ -100,7 +98,7 @@ 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 = []
@@ -120,9 +118,6 @@ html_theme = 'openstackdocs'
 # documentation.
 # html_theme_options = {}
 
-# Add any paths that contain custom themes here, relative to this directory.
-html_theme_path = [openstackdocstheme.get_html_theme_path()]
-
 # The name for this set of Sphinx documents.  If None, it defaults to
 # "<project> v<release> documentation".
 # html_title = None
@@ -149,10 +144,6 @@ 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