fix building sdist without git

diff --git a/setup.py b/setup.py
index 8f8e6f96c04cda95b45b485e9297ae67736c8d3c..417716184f7ec6df7b92a4f58b5ccccd3526157a 100644 (file)
--- a/setup.py
+++ b/setup.py
@@ -3,7 +3,7 @@ from distutils.sysconfig import get_python_lib
 import os, os.path
 import sys
 
-if 'sdist' in sys.argv and sys.platform != "win32":
+if 'sdist' in sys.argv and sys.platform != "win32" and os.path.isdir('.git'):
     assert os.system("git show-ref -s HEAD > .gitrev") == 0
 
 if sys.platform == "darwin":