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: I5598eebe898555869cd65a74950fdbd76a7baa46

doc/requirements.txt

@@ -1,4 +1,4 @@
-openstackdocstheme>=1.18.1 # Apache-2.0
-reno>=2.5.0 # Apache-2.0
-sphinx!=1.6.6,!=1.6.7,>=1.6.2 # BSD
+openstackdocstheme>=2.2.1 # Apache-2.0
+reno>=3.1.0 # Apache-2.0
+sphinx>=2.0.0,!=2.1.0 # BSD
 sphinxcontrib-httpdomain>=1.3.0  # BSD

doc/source/conf.py

@@ -51,18 +51,8 @@ source_suffix = '.rst'
 master_doc = 'index'
 
 # General information about the project.
-project = 'python-heatclient'
 copyright = 'OpenStack Contributors'
 
-# 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.
-#
-# The short X.Y version.
-version = '2.13'
-# The full version, including alpha/beta/rc tags.
-release = '2.13.0'
-
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.
 # language = None
@@ -93,7 +83,7 @@ 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 = []
@@ -140,11 +130,6 @@ html_theme_options = {
 # 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 = '%Y-%m-%d %H:%M'
-
-
 # If true, SmartyPants will be used to convert quotes and dashes to
 # typographically correct entities.
 # html_use_smartypants = True
@@ -261,6 +246,5 @@ texinfo_documents = [
 # texinfo_show_urls = 'footnote'
 
 # -- Options for openstackdocstheme -------------------------------------------
-repository_name = 'openstack/python-heatclient'
-bug_project = '997'
-bug_tag = 'docs'
+openstackdocs_repo_name = 'openstack/python-heatclient'
+openstackdocs_use_storyboard = True

lower-constraints.txt

@@ -37,7 +37,6 @@ msgpack-python==0.4.0
 munch==2.1.0
 netaddr==0.7.18
 netifaces==0.10.4
-openstackdocstheme==1.18.1
 openstacksdk==0.11.2
 os-client-config==1.28.0
 os-service-types==1.2.0
@@ -74,7 +73,6 @@ python-subunit==1.0.0
 python-swiftclient==3.2.0
 pytz==2013.6
 PyYAML==3.12
-reno==2.5.0
 requests-mock==1.2.0
 requests==2.14.2
 requestsexceptions==1.2.0
@@ -82,8 +80,6 @@ rfc3986==0.3.1
 simplejson==3.5.1
 six==1.10.0
 snowballstemmer==1.2.1
-Sphinx==1.6.2
-sphinxcontrib-websupport==1.0.1
 stestr==2.0.0
 stevedore==1.20.0
 tempest==17.1.0

releasenotes/source/conf.py

@@ -47,9 +47,9 @@ extensions = [
 ]
 
 # openstackdocstheme options
-repository_name = 'openstack/python-heatclient'
-bug_project = 'heat'
-bug_tag = ''
+openstackdocs_repo_name = 'openstack/python-heatclient'
+openstackdocs_use_storyboard = True
+openstackdocs_auto_name = False
 
 # Add any paths that contain templates here, relative to this directory.
 templates_path = ['_templates']
@@ -91,7 +91,7 @@ language = None
 exclude_patterns = []
 
 # The name of the Pygments (syntax highlighting) style to use.
-pygments_style = 'sphinx'
+pygments_style = 'native'
 
 # If true, `todo` and `todoList` produce output, else they produce nothing.
 todo_include_todos = False
@@ -103,7 +103,6 @@ todo_include_todos = False
 # a list of builtin themes.
 html_theme = 'openstackdocs'
 
-html_last_updated_fmt = '%Y-%m-%d %H:%M'
 # 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
 # documentation.