switch from oslosphinx to openstackdocstheme

Change-Id: I56ac175ea046c0bcd1e1b2d515e4279437739d91
ref:https://docs.openstack.org/openstackdocstheme/latest/

doc/source/conf.py

@@ -31,10 +31,15 @@ import os
 extensions = ['sphinx.ext.autodoc',
               'sphinx.ext.todo',
               'sphinx.ext.viewcode',
-              'oslosphinx',
+              'openstackdocstheme',
               'yasfb',
              ]
 
+# openstackdocstheme options
+repository_name = 'openstack/cinder-specs'
+bug_project = 'cinder-specs'
+bug_tag = 'doc'
+
 # Feed configuration for yasfb
 feed_base_url = 'http://specs.openstack.org/openstack/cinder-specs'
 feed_author = 'OpenStack Cinder Team'
@@ -101,7 +106,7 @@ man_pages = []
 
 # The theme to use for HTML and HTML Help pages.  See the documentation for
 # a list of builtin themes.
-html_theme = 'nature'
+html_theme = 'openstackdocs'
 
 # 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
@@ -129,9 +134,8 @@ html_theme = 'nature'
 
 # If not '', a 'Last updated on:' timestamp is inserted at every page bottom,
 # using the given strftime format.
-git_cmd = ["git", "log", "--pretty=format:'%ad, commit %h'", "--date=local",
-    "-n1"]
-html_last_updated_fmt = subprocess.check_output(git_cmd).decode('utf-8')
+
+html_last_updated_fmt = '%Y-%m-%d %H:%M'
 
 # If true, SmartyPants will be used to convert quotes and dashes to
 # typographically correct entities.

requirements.txt

@@ -1,4 +1,4 @@
-oslosphinx
+openstackdocstheme>=1.11.0
 pbr>=0.6,<1.0
 sphinx>=1.6.2 # BSD
 testrepository>=0.0.18