[PATCH] clone: allow clones into effectively empty directories

[Jason Harris]

# HG changeset patch
# User jfh <jason at jasonfharris.com>
# Date 1301985969 -7200
# Node ID b583c5667fad5d84899f94183117757f42de41e8
# Parent  0995eee8ffe4a24478379fb16fd6c38812bc3dd5
clone: allow clones into effectively empty directories

In OSX many empty directories actually have a '.DS_Store' file
in them, which is effectively ignored by lots of things.  The
presence of this .DS_Store file shouldn't mean that the directory
is treated as though it really has stuff in it.

diff --git a/mercurial/hg.py b/mercurial/hg.py
--- a/mercurial/hg.py
+++ b/mercurial/hg.py
@@ -227,7 +227,7 @@
     if os.path.exists(dest):
         if not os.path.isdir(dest):
             raise util.Abort(_("destination '%s' already exists") % dest)
-        elif os.listdir(dest):
+        elif not util.effectivelyempty(dest):
             raise util.Abort(_("destination '%s' is not empty") % dest)
 
     class DirCleanup(object):
diff --git a/mercurial/util.py b/mercurial/util.py
--- a/mercurial/util.py
+++ b/mercurial/util.py
@@ -493,6 +493,13 @@
 
     return hardlink, num
 
+def effectivelyempty(d):
+    for file in os.listdir(d):
+        if file != '.DS_Store':
+            return False
+    return True
+
+
 class path_auditor(object):
     '''ensure that a filesystem path contains no banned components.
     the following properties of a path are checked: