[PATCH v2 1/7] docs: enable sphinx blockdiag extension

[Hao Wu]

From: Havard Skinnemoen <hskinnemoen@google.com>

This allows use to add block diagrams in documentations,
such as the block diagram in docs/specs/impi.rst.

Signed-off-by: Havard Skinnemoen <hskinnemoen@google.com>
Signed-off-by: Hao Wu <hskinnemoen@google.com>
---
 docs/conf.py | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/docs/conf.py b/docs/conf.py
index 00767b0e24..6974647408 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -71,7 +71,11 @@
 # Add any Sphinx extension module names here, as strings. They can be
 # extensions coming with Sphinx (named 'sphinx.ext.*') or your custom
 # ones.
-extensions = ['kerneldoc', 'qmp_lexer', 'hxtool', 'depfile', 'qapidoc']
+extensions = ['kerneldoc', 'qmp_lexer', 'hxtool', 'depfile', 'qapidoc',
+        'sphinxcontrib.blockdiag']
+
+# Fontpath for blockdiag (truetype font)
+blockdiag_fontpath = 
'/usr/share/fonts/truetype/liberation/LiberationSans-Regular.ttf'
 
 if sphinx.version_info[:3] > (4, 0, 0):
     tags.add('sphinx4')
-- 
2.40.0.348.gf938b09366-goog