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
* parallelizing building of documents

Update Sphinx version as well.

openstackdocstheme renames some variables, so follow the renames. A
couple of variables are also not needed anymore, remove them.

Set openstackdocs_auto_name to use project as name.
Set openstackdocs_pdf_link to link to PDF file.

Remove docs requirements from lower-constraints, they are not installed.

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: I320a69816b4101bb76b88448881f3177c892ea92

api-ref/source/conf.py

@@ -64,9 +64,9 @@ master_doc = 'index'
 copyright = u'2010-present, OpenStack Foundation'
 
 # -- Options for openstackdocstheme -------------------------------------------
-repository_name = 'openstack/keystone'
-bug_project = 'keystone'
-bug_tag = 'api-ref'
+openstackdocs_repo_name = 'openstack/keystone'
+openstackdocs_bug_project = 'keystone'
+openstackdocs_bug_tag = 'api-ref'
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.
@@ -98,7 +98,7 @@ add_module_names = False
 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 = []

doc/requirements.txt

@@ -1,13 +1,13 @@
 # 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>=1.20.0 # Apache-2.0
-sphinx!=1.6.6,!=1.6.7,!=2.1.0,>=1.6.2  # BSD
+openstackdocstheme>=2.2.1 # Apache-2.0
+sphinx>=2.0.0,!=2.1.0 # BSD
 sphinxcontrib-apidoc>=0.2.0  # BSD
 sphinxcontrib-seqdiag>=0.8.4  # BSD
 sphinx-feature-classification>=0.3.2  # Apache-2.0
 sphinxcontrib-blockdiag>=1.5.5  # BSD
-reno>=2.5.0 # Apache-2.0
+reno>=3.1.0 # Apache-2.0
 os-api-ref>=1.4.0 # Apache-2.0
 python-ldap>=3.0.0  # PSF
 ldappool>=2.0.0 # MPL

doc/source/conf.py

@@ -114,7 +114,7 @@ exclude_patterns = ['old']
 show_authors = True
 
 # 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 = ['keystone.']
@@ -276,7 +276,8 @@ texinfo_documents = [
 # intersphinx_mapping = {'http://docs.python.org/': None}
 
 # -- Options for openstackdocstheme -------------------------------------------
-repository_name = 'openstack/keystone'
-bug_project = 'keystone'
-bug_tag = 'documentation'
-openstack_projects = ['python-openstackclient']
+openstackdocs_repo_name = 'openstack/keystone'
+openstackdocs_bug_project = 'keystone'
+openstackdocs_bug_tag = 'documentation'
+openstackdocs_projects = ['python-openstackclient']
+openstackdocs_pdf_link = True

lower-constraints.txt

@@ -22,7 +22,6 @@ lxml==3.4.1
 mock==2.0.0
 msgpack==0.5.0
 oauthlib==0.6.2
-openstackdocstheme==1.20.0
 os-api-ref==1.4.0
 os-testr==1.0.0
 oslo.cache==1.26.0
@@ -56,7 +55,6 @@ pytz==2013.6
 requests==2.14.2
 scrypt==0.8.0
 six==1.10.0
-Sphinx==1.6.5
 sqlalchemy-migrate==0.11.0
 SQLAlchemy==1.1.0
 stestr==1.0.0

releasenotes/source/conf.py

@@ -95,7 +95,7 @@ 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 = []
@@ -263,6 +263,7 @@ texinfo_documents = [
 locale_dirs = ['locale/']
 
 # -- Options for openstackdocstheme -------------------------------------------
-repository_name = 'openstack/keystone'
-bug_project = 'keystone'
-bug_tag = 'doc'
+openstackdocs_auto_name = False
+openstackdocs_repo_name = 'openstack/keystone'
+openstackdocs_bug_project = 'keystone'
+openstackdocs_bug_tag = 'doc'