git-fetch-pack: Do not use git-rev-list

diff --git a/gitMergeCommon.py b/gitMergeCommon.py
index 7e8855c617ac3391a698e61023d9ca465b4b295e..1b5bddd467c3d2265e8204bb90c80a2c53742b4a 100644 (file)
--- a/gitMergeCommon.py
+++ b/gitMergeCommon.py
@@ -213,7 +213,7 @@ def buildGraph(heads):
 
 # Write the empty tree to the object database and return its SHA1
 def writeEmptyTree():
-    tmpIndex = os.environ['GIT_DIR'] + '/merge-tmp-index'
+    tmpIndex = os.environ.get('GIT_DIR', '.git') + '/merge-tmp-index'
     def delTmpIndex():
         try:
             os.unlink(tmpIndex)