[Bf-docboard-svn] bf-manual: [7196] trunk/blender_docs/manual/conf.py: Support building without 'sphinx_rtd_theme'

[Campbell Barton]

Revision: 7196
          https://developer.blender.org/rBM7196
Author:   campbellbarton
Date:     2020-10-08 03:03:16 +0200 (Thu, 08 Oct 2020)
Log Message:
-----------
Support building without 'sphinx_rtd_theme'

It seems this is no longer part of a default sphinx installation,
so support building without it.

Modified Paths:
--------------
    trunk/blender_docs/manual/conf.py

Modified: trunk/blender_docs/manual/conf.py
===================================================================
--- trunk/blender_docs/manual/conf.py	2020-10-08 00:51:38 UTC (rev 7195)
+++ trunk/blender_docs/manual/conf.py	2020-10-08 01:03:16 UTC (rev 7196)
@@ -176,8 +176,14 @@
 # -- Options for HTML output ---------------------------------------------------
 # The theme to use for HTML and HTML Help pages.  See the documentation for
 # a list of builtin themes.
-html_theme = "sphinx_rtd_theme"
+html_theme = "default"
+try:
+    __import__("sphinx_rtd_theme")
+    html_theme = "sphinx_rtd_theme"
+except ModuleNotFound:
+    pass
 
+
 # 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
 # documentation.