From: Zac Medico <zmedico@gentoo.org>
Date: Fri, 10 Feb 2006 22:07:52 +0000 (-0000)
Subject: avoid unnecessary stat by catching ENOENT error instead of using os.path.exists()
X-Git-Tag: v2.1_pre5_2760~60
X-Git-Url: http://git.tremily.us/?a=commitdiff_plain;h=d215e2a84591dd3568d13c5fcaa5ba309b4c7994;p=portage.git

avoid unnecessary stat by catching ENOENT error instead of using os.path.exists()

svn path=/main/trunk/; revision=2690
---

diff --git a/pym/portage_checksum.py b/pym/portage_checksum.py
index f837966bc..a11dbc4f6 100644
--- a/pym/portage_checksum.py
+++ b/pym/portage_checksum.py
@@ -6,6 +6,7 @@
 
 from portage_const import PRIVATE_PATH,PRELINK_BINARY,HASHING_BLOCKSIZE
 import os
+import errno
 import shutil
 import stat
 import portage_exception
@@ -134,8 +135,13 @@ def perform_checksum(filename, hash_function=md5hash, calc_prelink=0):
 	myhash, mysize = hash_function(myfilename)
 
 	if calc_prelink and prelink_capable:
-		if os.path.exists(prelink_tmpfile):
+		try:
 			os.unlink(prelink_tmpfile)
+		except OSError, oe:
+			if oe.errno == errno.ENOENT:
+				pass
+			else:
+				raise oe
 		portage_locks.unlockfile(mylock)
 
 	return (myhash,mysize)