From: David Stainton <dstainton415@gmail.com>
Date: Wed, 26 Aug 2015 20:02:26 +0000 (+0200)
Subject: Fix replace_file; rename only if replaced_path exists
X-Git-Url: https://git.rkrishnan.org/pf/content/en/seg/priv.html?a=commitdiff_plain;h=5f9351710b50fd8defb16a1ac4fa6f8959907fbc;p=tahoe-lafs%2Ftahoe-lafs.git

Fix replace_file; rename only if replaced_path exists
---

diff --git a/src/allmydata/util/fileutil.py b/src/allmydata/util/fileutil.py
index 5461319d..16dda5c0 100644
--- a/src/allmydata/util/fileutil.py
+++ b/src/allmydata/util/fileutil.py
@@ -619,13 +619,12 @@ else:
         if not os.path.exists(replacement_path):
             raise ConflictError("Replacement file not found: %r" % (replacement_path,))
         try:
-            os.rename(replaced_path, backup_path)
+            if os.path.exists(replaced_path):
+                os.rename(replaced_path, backup_path)
             rename_no_overwrite(replacement_path, replaced_path)
         except EnvironmentError:
-            print "@@@@@@@@@@@@@@@@@@@@@@@@@@@env err"
             reraise(ConflictError)
 
-
 PathInfo = namedtuple('PathInfo', 'isdir isfile islink exists size ctime mtime')
 
 def get_pathinfo(path_u):