resourceutil: correct the root path for file based lookup under py2exe

This silly copy/paste error caused "Mercurial" to be truncated from
"C:\Program Files".  The fact that "helptext" and "defaultrc" are now in a
subpackage of "mercurial" added it back on, and everything seemed to work.  But
that broke if not installed to the default directory, and also caused TortoiseHg
to look at Mercurial's config files instead of its own.

Differential Revision: https://phab.mercurial-scm.org/D8054

mercurial/utils/resourceutil.py

@@ -1,85 +1,85 b''
 # resourceutil.py - utility for looking up resources
 #
 #  Copyright 2005 K. Thananchayan <[e-mail]>
 #  Copyright 2005-2007 Matt Mackall <[e-mail]>
 #  Copyright 2006 Vadim Gelfer <[e-mail]>
 #
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2 or any later version.
 
 from __future__ import absolute_import
 
 import imp
 import os
 import sys
 
 from .. import pycompat
 
 
 def mainfrozen():
     """return True if we are a frozen executable.
 
     The code supports py2exe (most common, Windows only) and tools/freeze
     (portable, not much used).
     """
     return (
         pycompat.safehasattr(sys, "frozen")
         or pycompat.safehasattr(sys, "importers")  # new py2exe
         or imp.is_frozen("__main__")  # old py2exe
     )  # tools/freeze
 
 
 # the location of data files matching the source code
 if mainfrozen() and getattr(sys, 'frozen', None) != 'macosx_app':
     # executable version (py2exe) doesn't support __file__
     datapath = os.path.dirname(pycompat.sysexecutable)
-    _rootpath = os.path.dirname(datapath)
+    _rootpath = datapath
 else:
     datapath = os.path.dirname(os.path.dirname(pycompat.fsencode(__file__)))
     _rootpath = os.path.dirname(datapath)
 
 try:
     from importlib import resources
 
     from .. import encoding
 
     # Force loading of the resources module
     resources.open_binary  # pytype: disable=module-attr
 
     def open_resource(package, name):
         return resources.open_binary(  # pytype: disable=module-attr
             pycompat.sysstr(package), pycompat.sysstr(name)
         )
 
     def is_resource(package, name):
         return resources.is_resource(
             pycompat.sysstr(package), encoding.strfromlocal(name)
         )
 
     def contents(package):
         for r in resources.contents(pycompat.sysstr(package)):
             yield encoding.strtolocal(r)
 
 
 except (ImportError, AttributeError):
 
     def _package_path(package):
         return os.path.join(_rootpath, *package.split(b'.'))
 
     def open_resource(package, name):
         path = os.path.join(_package_path(package), name)
         return open(path, 'rb')
 
     def is_resource(package, name):
         path = os.path.join(_package_path(package), name)
 
         try:
             return os.path.isfile(pycompat.fsdecode(path))
         except (IOError, OSError):
             return False
 
     def contents(package):
         path = pycompat.fsdecode(_package_path(package))
 
         for p in os.listdir(path):
             yield pycompat.fsencode(p)