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Early check for dot binary (from graphviz) when building the doc (fixes #8207) #8221

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Merged
merged 1 commit into from
Mar 8, 2017
+11 −0
Merged

Early check for dot binary (from graphviz) when building the doc (fixes #8207) #8221

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11 changes: 11 additions & 0 deletions doc/conf.py
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Original file line number Diff line number Diff line change
Expand Up @@ -14,6 +14,7 @@
import os
import sys
import sphinx
import six

# If your extensions are in another directory, add it here. If the directory
# is relative to the documentation root, use os.path.abspath to make it
Expand Down Expand Up @@ -73,6 +74,16 @@
raise ImportError("No module named Image - you need to install "
"pillow to build the documentation")

if six.PY2:
from distutils.spawn import find_executable
has_dot = find_executable('dot') is not None
else:
from shutil import which # Python >= 3.3
has_dot = which('dot') is not None
if not has_dot:
raise OSError(
"No binary named dot - you need to install the Graph Visualization "
"software (usually packaged as 'graphviz') to build the documentation")

try:
import matplotlib
Expand Down