From: Daira Hopwood <daira@jacaranda.org>
Date: Mon, 31 Aug 2015 16:52:55 +0000 (+0100)
Subject: replace_file should not fail if replaced_path does not exist.
X-Git-Url: https://git.rkrishnan.org/pf/content/en/rgr-080307.php?a=commitdiff_plain;h=bfda47fef4e431699d72d8323fdf6bdbbc74445e;p=tahoe-lafs%2Ftahoe-lafs.git

replace_file should not fail if replaced_path does not exist.

Signed-off-by: Daira Hopwood <daira@jacaranda.org>
---

diff --git a/src/allmydata/util/fileutil.py b/src/allmydata/util/fileutil.py
index 9a194e99..2debc7f7 100644
--- a/src/allmydata/util/fileutil.py
+++ b/src/allmydata/util/fileutil.py
@@ -619,7 +619,11 @@ else:
         if not os.path.exists(replacement_path):
             raise ConflictError("Replacement file not found: %r" % (replacement_path,))
         try:
-            os.rename(replaced_path, backup_path)
+            try:
+                os.rename(replaced_path, backup_path)
+            except OSError as e:
+                if e.errno != errno.EEXIST:
+                    raise
             rename_no_overwrite(replacement_path, replaced_path)
         except EnvironmentError:
             reraise(ConflictError)