Cross-repo recipe package system.

scripts/slave/recipe_modules/properties/api.py

-# Copyright 2013 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.
-
-from infra.libs.infra_types import freeze, thaw
-from recipe_engine import recipe_api
-import collections
-
-# Use RecipeApiPlain because collections.Mapping has its own metaclass.
-# Additionally, nothing in this class is a composite_step (nothing in this class
-# is any sort of step :).
-class PropertiesApi(recipe_api.RecipeApiPlain, collections.Mapping):
-  """
-  Provide an immutable mapping view into the 'properties' for the current run.
-
-  The value of this api is equivalent to this transformation of the legacy
-  build values:
-    val = factory_properties
-    val.update(build_properties)
-  """
-  def __init__(self, **kwargs):
-    super(PropertiesApi, self).__init__(**kwargs)
-    self._properties = freeze(self._engine.properties)
-
-  def __getitem__(self, key):
-    return self._properties[key]
-
-  def __len__(self):
-    return len(self._properties)
-
-  def __iter__(self):
-    return iter(self._properties)
-
-  def legacy(self):
-    """Returns a reduced set of properties, possibly used by legacy scripts."""
-
-    # Add all properties to this blacklist that are required for testing, but
-    # not used by any lecacy scripts, in order to avoid vast expecation
-    # changes.
-    blacklist = set([
-      'buildbotURL',
-    ])
-    return {k: v for k, v in self.iteritems() if k not in blacklist}
-
-  def thaw(self):
-    """Returns a vanilla python jsonish dictionary of properties."""
-
-    return thaw(self._engine.properties)