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.

Disable openstackdocs_auto_name to use 'project' variable 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.

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: I5f985549671e3b4f8c438f247fae0818d25b21f5

doc/source/conf.py

@@ -35,8 +35,9 @@ source_suffix = '.rst'
 master_doc = 'index'
 
 # General information about the project.
-repository_name = 'openstack/openstack-doc-tools'
-bug_tag = u'openstack-doc-tools'
+openstackdocs_repo_name = 'openstack/openstack-doc-tools'
+openstackdocs_auto_name = False
+openstackdocs_bug_tag = u'openstack-doc-tools'
 project = u'OpenStack-doc-tools'
 copyright = u'2017, OpenStack Foundation'
 
@@ -48,7 +49,7 @@ 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 --------------------------------------------------
 

lower-constraints.txt

@@ -21,7 +21,7 @@ lxml==3.4.1
 MarkupSafe==1.0
 mccabe==0.2.1
 mock==2.0.0
-openstackdocstheme==1.20.0
+openstackdocstheme==2.2.1
 pbr==2.0.0
 pep8==1.5.7
 pyflakes==0.8.1
@@ -31,12 +31,12 @@ python-mimeparse==1.6.0
 python-subunit==1.0.0
 pytz==2013.6
 PyYAML==3.12
-reno==2.5.0
+reno==3.1.0
 requests==2.14.2
 restructuredtext-lint==1.1.1
 six==1.10.0
 snowballstemmer==1.2.1
-Sphinx==1.8.0
+Sphinx==2.0.0
 sphinxcontrib-websupport==1.0.1
 stevedore==1.20.0
 stestr==2.0.0

releasenotes/source/conf.py

@@ -52,8 +52,9 @@ source_suffix = '.rst'
 master_doc = 'index'
 
 # General information about the project.
-repository_name = 'openstack/openstack-doc-tools'
-bug_tag = u'openstack-doc-tools'
+openstackdocs_repo_name = 'openstack/openstack-doc-tools'
+openstackdocs_auto_name = False
+openstackdocs_bug_tag = u'openstack-doc-tools'
 project = u'OpenStack-doc-tools Release Notes'
 copyright = u'2015-2017, OpenStack Documentation team'
 
@@ -93,7 +94,7 @@ 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 = []

requirements.txt

@@ -6,6 +6,6 @@ pbr!=2.1.0,>=2.0.0 # Apache-2.0
 iso8601>=0.1.11 # MIT
 lxml!=3.7.0,>=3.4.1 # BSD
 docutils>=0.11 # OSI-Approved Open Source, Public Domain
-sphinx>=1.8.0,!=2.1.0 # BSD
+sphinx>=2.0.0,!=2.1.0 # BSD
 demjson>=2.2.2 # GLGPLv3+
 PyYAML>=3.12 # MIT

test-requirements.txt

@@ -10,8 +10,8 @@ doc8>=0.6.0 # Apache-2.0
 
 pylint==1.7.1 # GPLv2
 
-reno>=2.5.0 # Apache-2.0
-openstackdocstheme>=1.20.0 # Apache-2.0
+reno>=3.1.0 # Apache-2.0
+openstackdocstheme>=2.2.1 # Apache-2.0
 stestr>=2.0.0 # Apache-2.0
 
 # mock object framework