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

2 files changed, 6 insertions, 22 deletions

diff --git a/doc/requirements.txt b/doc/requirements.txt
index 6889f20..13389d3 100644
--- a/doc/requirements.txt
+++ b/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
diff --git a/doc/source/conf.py b/doc/source/conf.py
index e519154..070fc08 100644
--- a/doc/source/conf.py
+++ b/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