# HG changeset patch
# User Matt Harbison <matt_harbison@yahoo.com>
# Date 1424038908 18000
# Node ID e0f06228bb666c3950b5a1397e0db4cd50feb15a
# Parent  9cb1f82a2571619776a92eb5b5a0028adc853969
archive: change the default prefix to '' from None

All current callers supply some sort of prefix, so the issue was hidden.  But if
no parameter was specified, a crash occurred in the write() closure when
concatenating 'prefix' and 'name'.

diff -r 9cb1f82a2571 -r e0f06228bb66 hgext/largefiles/overrides.py
--- a/hgext/largefiles/overrides.py	Wed Feb 25 11:39:14 2015 -0800
+++ b/hgext/largefiles/overrides.py	Sun Feb 15 17:21:48 2015 -0500
@@ -861,7 +861,7 @@
         repo._lfcommithooks.pop()
 
 def overridearchive(orig, repo, dest, node, kind, decode=True, matchfn=None,
-            prefix=None, mtime=None, subrepos=None):
+            prefix='', mtime=None, subrepos=None):
     # No need to lock because we are only reading history and
     # largefile caches, neither of which are modified.
     lfcommands.cachelfiles(repo.ui, repo, node)
diff -r 9cb1f82a2571 -r e0f06228bb66 mercurial/archival.py
--- a/mercurial/archival.py	Wed Feb 25 11:39:14 2015 -0800
+++ b/mercurial/archival.py	Sun Feb 15 17:21:48 2015 -0500
@@ -230,7 +230,7 @@
     }
 
 def archive(repo, dest, node, kind, decode=True, matchfn=None,
-            prefix=None, mtime=None, subrepos=False):
+            prefix='', mtime=None, subrepos=False):
     '''create archive of repo as it was at node.
 
     dest can be name of directory, name of archive file, or file