[PATCH 1 of 3 V3] hg: make repository take filtername argument to avoid useless filtering

[FUJIWARA Katsunori]

# HG changeset patch
# User FUJIWARA Katsunori <foozy at lares.dti.ne.jp>
# Date 1451818994 -32400
#      Sun Jan 03 20:03:14 2016 +0900
# Node ID 85def1110482e9f731e56da12d0c6b624f4d8a45
# Parent  b8405d739149cdd6d8d9bd5e3dd2ad8487b1f09a
hg: make repository take filtername argument to avoid useless filtering

If user of 'repository()' wants non-"visible" view (or unfiltered
repository), filtering for "visible" view itself is meaningless.

diff --git a/mercurial/hg.py b/mercurial/hg.py
--- a/mercurial/hg.py
+++ b/mercurial/hg.py
@@ -155,14 +155,16 @@ def _peerorrepo(ui, path, create=False):
             f(ui, obj)
     return obj
 
-def repository(ui, path='', create=False):
+def repository(ui, path='', create=False, filtername='visible'):
     """return a repository object for the specified path"""
     peer = _peerorrepo(ui, path, create)
     repo = peer.local()
     if not repo:
         raise error.Abort(_("repository '%s' is not local") %
                          (path or peer.url()))
-    return repo.filtered('visible')
+    if not filtername:
+        return repo.unfiltered()
+    return repo.filtered(filtername)
 
 def peer(uiorrepo, opts, path, create=False):
     '''return a repository peer for the specified path'''