# HG changeset patch
# User Pierre-Yves David <pierre-yves.david@ens-lyon.org>
# Date 1493734745 -7200
# Node ID ef8beb602b418100d3968f9a6459077fd3b87e3f
# Parent  0d2e0e8e76f6554e788effaf544635d60431692d
obscache: skip writing if the cache is empty

if the cache is empty, we can just skip writing to disk.

diff -r 0d2e0e8e76f6 -r ef8beb602b41 hgext3rd/evolve/obscache.py
--- a/hgext3rd/evolve/obscache.py	Tue May 02 16:17:03 2017 +0200
+++ b/hgext3rd/evolve/obscache.py	Tue May 02 16:19:05 2017 +0200
@@ -302,7 +302,7 @@
         """save the data to disk"""
 
         # XXX it happens that the obsstore is (buggilly) always up to date on disk
-        if self._cachekey is None:
+        if self._cachekey is None or self._cachekey == emptykey:
             return
 
         with repo.vfs(self._filepath, 'w', atomictemp=True) as cachefile: