# HG changeset patch
# User Bryan O'Sullivan <bos@serpentine.com>
# Date 1127457104 25200
# Node ID b3d44e9b30921b4317ec825b8b86ea11f0198839
# Parent  b47f96a178a3d9437a1367e6813967e8ed1ecf6f
Make revlog constructor more discerning in its treatment of errors.


diff -r b47f96a178a3 -r b3d44e9b3092 mercurial/revlog.py
--- a/mercurial/revlog.py	Thu Sep 22 23:19:47 2005 -0700
+++ b/mercurial/revlog.py	Thu Sep 22 23:31:44 2005 -0700
@@ -10,9 +10,9 @@
 of the GNU General Public License, incorporated herein by reference.
 """
 
-import zlib, struct, sha, binascii, heapq
-import mdiff
 from node import *
+from demandload import demandload
+demandload(globals(), "binascii errno heapq mdiff sha struct urllib2 zlib")
 
 def hash(text, p1, p2):
     """generate a hash from the given text and its parent hashes
@@ -179,7 +179,11 @@
 
         try:
             i = self.opener(self.indexfile).read()
-        except IOError:
+        except urllib2.URLError:
+            raise
+        except IOError, inst:
+            if inst.errno != errno.ENOENT:
+                raise
             i = ""
 
         if len(i) > 10000: