From d0ec2690b47e3f674f997b8093f839e92d0111a6 Mon Sep 17 00:00:00 2001
From: Matt Behrens <matt@zigg.com>
Date: Tue, 4 Feb 2014 21:11:49 -0500
Subject: note why we use the same directory

---
 bin/jsonpatch | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/bin/jsonpatch b/bin/jsonpatch
index eb8bdb3..3f01738 100755
--- a/bin/jsonpatch
+++ b/bin/jsonpatch
@@ -47,7 +47,8 @@ def patch_files():
             # Attempt to replace the file atomically.  We do this by
             # creating a temporary file in the same directory as the
             # original file so we can atomically move the new file over
-            # the original later.
+            # the original later.  (This is done in the same directory
+	    # because atomic renames do not work across mount points.)
 
             fd, pathname = tempfile.mkstemp(dir=dirname)
             fp = os.fdopen(fd, 'w')
-- 
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