recipe_engine: change resource API to use repo root

recipe_engine/config_types.py

 # Copyright 2013-2015 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import abc
 import re
 
 from collections import namedtuple
 
 from . import types
@@ skipping 77 matching lines @@
 class ModuleBasePath(BasePath, namedtuple('ModuleBasePath', 'module')):
   def __repr__(self):
     prefix = '%s.' % RECIPE_MODULE_PREFIX
     assert self.module.__name__.startswith(prefix)
     name = self.module.__name__[len(prefix):]
     # We change python's module delimiter . to ::, since . is already used
     # by expect tests.
     return 'RECIPE_MODULE[%s]' % re.sub('\.', '::', name)
 
 
-class PackageBasePath(BasePath, namedtuple('PackageBasePath', 'package')):
+class PackageRepoBasePath(
+    BasePath, namedtuple('PackageRepoBasePath', 'package')):
   def __repr__(self):
-    return 'RECIPE_PACKAGE[%s]' % self.package.name
+    return 'RECIPE_PACKAGE_REPO[%s]' % self.package.name
 
 
 class Path(RecipeConfigType):
   """Represents a path which is relative to a semantically-named base.
 
   Because there's a lot of platform (separator style) and runtime-specific
   context (working directory) which goes into assembling a final OS-specific
   absolute path, we only store three context-free attributes in this Path
   object.
   """
@@ skipping 49 matching lines @@
     return child.pieces[:len(self.pieces)] == self.pieces
 
   def default_tostring_fn(self):
     suffix = ''
     if self.platform_ext:
       suffix = ', platform_ext=%r' % (self.platform_ext,)
     pieces = ''
     if self.pieces:
       pieces = ', ' + (', '.join(map(repr, self.pieces)))
     return 'Path(\'%s\'%s%s)' % (self.base, pieces, suffix)