Switch to newer openstackdocstheme and reno versions3.2.0

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.

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: Ie4aec288c74b9bd8d8d117f4bc2e0282cea4db90

4 files changed, 14 insertions, 23 deletions

diff --git a/doc/requirements.txt b/doc/requirements.txt
index e8ba0fa..97c1879 100644
--- a/doc/requirements.txt
+++ b/doc/requirements.txt
@@ -1,7 +1,7 @@
 # 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
-reno>=2.5.0 # Apache-2.0
-sphinx!=1.6.6,!=1.6.7,!=2.1.0,>=1.6.2 # BSD
+openstackdocstheme>=2.2.1 # Apache-2.0
+reno>=3.1.0 # Apache-2.0
+sphinx>=2.0.0,!=2.1.0 # BSD
 sphinxcontrib-apidoc>=0.2.0  # BSD
diff --git a/doc/source/conf.py b/doc/source/conf.py
index 74d6595..bfe9b56 100644
--- a/doc/source/conf.py
+++ b/doc/source/conf.py
@@ -16,7 +16,6 @@
 import os
 import sys
 
-import openstackdocstheme
 
 sys.path.insert(0, os.path.abspath(os.path.join(os.path.dirname(__file__),
                 '..', '..')))
@@ -39,9 +38,9 @@ apidoc_excluded_paths = [
 apidoc_separate_modules = True
 
 # openstackdocstheme options
-repository_name = 'openstack/python-glanceclient'
-bug_project = 'python-glanceclient'
-bug_tag = ''
+openstackdocs_repo_name = 'openstack/python-glanceclient'
+openstackdocs_bug_project = 'python-glanceclient'
+openstackdocs_bug_tag = ''
 
 # autodoc generation is a bit aggressive and a nuisance when doing heavy
 # text edit cycles.
@@ -68,7 +67,7 @@ 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 --------------------------------------------------
 
@@ -77,10 +76,6 @@ pygments_style = 'sphinx'
 #html_theme = 'nature'
 html_theme = 'openstackdocs'
 
-# Add any paths that contain custom themes here, relative to this directory.
-#html_theme_path = ['_theme']
-html_theme_path = [openstackdocstheme.get_html_theme_path()]
-
 # Output file base name for HTML help builder.
 htmlhelp_basename = '%sdoc' % project
 
diff --git a/lower-constraints.txt b/lower-constraints.txt
index ecb84ad..d98e40b 100644
--- a/lower-constraints.txt
+++ b/lower-constraints.txt
@@ -31,7 +31,6 @@ monotonic==0.6
 msgpack-python==0.4.0
 netaddr==0.7.18
 netifaces==0.10.4
-openstackdocstheme==1.20.0
 ordereddict==1.1
 os-client-config==1.28.0
 os-testr==1.0.0
@@ -57,15 +56,12 @@ python-mimeparse==1.6.0
 python-subunit==1.0.0
 pytz==2013.6
 PyYAML==3.12
-reno==2.5.0
 requests-mock==1.2.0
 requests==2.14.2
 requestsexceptions==1.2.0
 rfc3986==0.3.1
 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
diff --git a/releasenotes/source/conf.py b/releasenotes/source/conf.py
index 75aab4d..d20e2f4 100644
--- a/releasenotes/source/conf.py
+++ b/releasenotes/source/conf.py
@@ -29,8 +29,6 @@
 # documentation root, use os.path.abspath to make it absolute, like shown here.
 # sys.path.insert(0, os.path.abspath('.'))
 
-import openstackdocstheme
-
 # -- General configuration ------------------------------------------------
 
 # If your documentation needs a minimal Sphinx version, state it here.
@@ -41,6 +39,7 @@ import openstackdocstheme
 # ones.
 extensions = [
     'reno.sphinxext',
+    'openstackdocstheme'
 ]
 
 # Add any paths that contain templates here, relative to this directory.
@@ -59,6 +58,11 @@ master_doc = 'index'
 project = u'glanceclient Release Notes'
 copyright = u'2016, Glance Developers'
 
+openstackdocs_repo_name = 'openstack/python-glanceclient'
+openstackdocs_bug_project = 'python-glanceclient'
+openstackdocs_bug_tag = ''
+openstackdocs_auto_name = False
+
 # Release notes are not versioned, so we don't need to set version or release
 version = ''
 release = ''
@@ -93,7 +97,7 @@ 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 = []
@@ -113,10 +117,6 @@ html_theme = 'openstackdocs'
 # documentation.
 # html_theme_options = {}
 
-# Add any paths that contain custom themes here, relative to this directory.
-# html_theme_path = []
-html_theme_path = [openstackdocstheme.get_html_theme_path()]
-
 # The name for this set of Sphinx documents.  If None, it defaults to
 # "<project> v<release> documentation".
 # html_title = None