Minor additional cleanup

Added additional information in the import warning/error that tells the
user how to silence the warning/error. Also added a GIT_OK variable
that allows for a quick check whether the refresh has succeeded instead
of needing to test an actual git command.

1 files changed, 7 insertions, 0 deletions

diff --git a/git/__init__.py b/git/__init__.py
index 7005cd60..4ba55305 100644
--- a/git/__init__.py
+++ b/git/__init__.py
@@ -60,12 +60,19 @@ __all__ = [name for name, obj in locals().items()
 
 
 #{ Initialize git executable path
+GIT_OK = None
+
 def refresh(path=None):
     """Convenience method for setting the git executable path."""
+    global GIT_OK
+    GIT_OK = False
+
     if not Git.refresh(path=path):
         return
     if not FetchInfo.refresh():
         return
+
+    GIT_OK = True
 #} END initialize git executable path
 
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