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.

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.

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.

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

Change-Id: I9daf3a281bdd5371e727dfd2f9a8a1f8e5cef68b

api-ref/source/conf.py

@@ -62,16 +62,6 @@ master_doc = 'index'
 project = u'Containers Service API Reference'
 copyright = u'2010-present, OpenStack Foundation'
 
-# The version info for the project you're documenting, acts as replacement for
-# |version| and |release|, also used in various other places throughout the
-# built documents.
-#
-from zun.version import version_info
-# The full version, including alpha/beta/rc tags.
-release = version_info.release_string()
-# The short X.Y version.
-version = version_info.version_string()
-
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.
 #
@@ -99,12 +89,13 @@ add_module_names = False
 show_authors = False
 
 # The name of the Pygments (syntax highlighting) style to use.
-pygments_style = 'sphinx'
+pygments_style = 'native'
 
 # openstackdocstheme options
-repository_name = 'openstack/zun'
-bug_project = 'zun'
-bug_tag = 'api-ref'
+openstackdocs_repo_name = 'openstack/zun'
+openstackdocs_bug_project = 'zun'
+openstackdocs_bug_tag = 'api-ref'
+openstackdocs_auto_name = False
 
 # -- Options for man page output ----------------------------------------------
 
@@ -148,11 +139,6 @@ bug_tag = 'api-ref'
 # so a file named "default.css" will overwrite the builtin "default.css".
 # html_static_path = ['_static']
 
-# 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'
-
 # If true, SmartyPants will be used to convert quotes and dashes to
 # typographically correct entities.
 # html_use_smartypants = True

doc/requirements.txt

@@ -2,8 +2,8 @@
 # of appearance. Changing the order has an impact on the overall integration
 # process, which may cause wedges in the gate later.
 # this is required for the docs build jobs
-sphinx>=1.8.0,!=2.1.0 # BSD
+sphinx>=2.0.0,!=2.1.0 # BSD
 sphinxcontrib-apidoc>=0.2.0 # BSD
-openstackdocstheme>=1.11.0 # Apache-2.0
-reno>=1.8.0  # Apache-2.0
+openstackdocstheme>=2.2.1 # Apache-2.0
+reno>=3.1.0 # Apache-2.0
 os-api-ref>=1.0.0 # Apache-2.0

doc/source/conf.py

@@ -40,9 +40,10 @@ source_suffix = '.rst'
 master_doc = 'index'
 
 # openstackdocstheme options
-repository_name = 'openstack/zun'
-bug_project = 'zun'
-bug_tag = ''
+openstackdocs_repo_name = 'openstack/zun'
+openstackdocs_pdf_link = True
+openstackdocs_bug_project = 'zun'
+openstackdocs_bug_tag = ''
 
 config_generator_config_file = '../../etc/zun/zun-config-generator.conf'
 sample_config_basename = '_static/zun'
@@ -62,7 +63,7 @@ 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 --------------------------------------------------
 
@@ -95,8 +96,5 @@ latex_elements = {
     'extraclassoptions': 'openany',
 }
 
-# Must set this variable to include year, month, day, hours, and minutes.
-html_last_updated_fmt = '%Y-%m-%d %H:%M'
-
 # Example configuration for intersphinx: refer to the Python standard library.
 # intersphinx_mapping = {'http://docs.python.org/': None}

lower-constraints.txt

@@ -61,7 +61,6 @@ munch==2.2.0
 netifaces==0.10.6
 neutron-lib==1.13.0
 numpy==1.14.2
-openstackdocstheme==1.18.1
 openstacksdk==0.12.0
 os-api-ref==1.4.0
 os-brick==2.2.0
@@ -127,7 +126,6 @@ python-subunit==1.2.0
 python-zunclient==3.5.0
 pytz==2018.3
 PyYAML==3.12
-reno==2.5.0
 repoze.lru==0.7
 requests==2.18.4
 requestsexceptions==1.4.0
@@ -139,8 +137,6 @@ simplegeneric==0.8.1
 simplejson==3.13.2
 smmap2==2.0.3
 snowballstemmer==1.2.1
-Sphinx==1.8.0
-sphinxcontrib-websupport==1.0.1
 SQLAlchemy==1.0.10
 sqlalchemy-migrate==0.11.0
 sqlparse==0.2.4

releasenotes/source/conf.py

@@ -93,7 +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 = []
@@ -109,9 +109,10 @@ pygments_style = 'sphinx'
 html_theme = 'openstackdocs'
 
 # openstackdocstheme options
-repository_name = 'openstack/zun'
-bug_project = 'zun'
-bug_tag = ''
+openstackdocs_repo_name = 'openstack/zun'
+openstackdocs_bug_project = 'zun'
+openstackdocs_bug_tag = ''
+openstackdocs_auto_name = False
 
 # Theme options are theme-specific and customize the look and feel of a theme
 # further.  For a list of options available for each theme, see the
@@ -147,9 +148,6 @@ bug_tag = ''
 # directly to the root of the documentation.
 # html_extra_path = []
 
-# Must set this variable to include year, month, day, hours, and minutes.
-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