def _resolve_registry_points(cls, base, dct):
module = cls.__module__
parents = [x for x in cls.__mro__ if x not in (cls, SpecSet, object)]
for k, v in dct.items():
if isinstance(v, RegistryPoint):
# add v under its name to this class's registry.
v.__name__ = k
cls.registry[k] = v
if is_datasource(v):
v.__qualname__ = ".".join([cls.__name__, k])
v.__name__ = k
v.__module__ = module
setattr(cls, k, SpecDescriptor(v))
if k in base.registry:
# if the datasource has the same name as a RegistryPoint in the
# base class, the datasource to the RegistryPoint.
point = base.registry[k]
# the RegistryPoint gets the implementation datasource as a
# dependency
dr.add_dependency(point, v)
dr.mark_hidden(v)
# Datasources override previously defined datasources of the
# same name for contexts they all depend on. Here we tell
# datasources of the same name not to execute under contexts
# the new datasource will handle.
_register_context_handler(parents, v)
def first_of(deps):
""" Given a list of dependencies, returns the first of the list
that exists in the broker. At least one must be present, or this
component won't fire.
"""
dr.mark_hidden(deps)
@datasource(deps)
def inner(broker):
for c in deps:
if c in broker:
return broker[c]
return inner
def _resolve_registry_points(cls, base, dct):
module = cls.__module__
parents = [x for x in cls.__mro__ if x not in (cls, SpecSet, object)]
for k, v in dct.items():
if isinstance(v, RegistryPoint):
v.__name__ = k
cls.registry[k] = v
if is_datasource(v):
v.__qualname__ = ".".join([cls.__name__, k])
v.__name__ = k
v.__module__ = module
setattr(cls, k, SpecDescriptor(v))
if k in base.registry:
point = base.registry[k]
dr.add_dependency(point, v)
dr.mark_hidden(v)
_register_context_handler(parents, v)
def first_of(deps):
""" Given a list of dependencies, returns the first of the list
that exists in the broker. At least one must be present, or this
component won't fire.
"""
dr.mark_hidden(deps)
@datasource(deps)
def inner(broker):
for c in deps:
if c in broker:
return broker[c]
docs = [
escape(d)
if isinstance(d, list) and d.func_name != 'inner' else d.__doc__
for d in deps if d.__doc__
]
docs = [enc(d) for d in docs]
inner.__doc__ = b",".join([b"Returns the first of the following:"] + docs)
return inner
def __init__(self, deps):
self.deps = deps
self.raw = deps[0].raw
dr.mark_hidden(deps)
self.__name__ = self.__class__.__name__
datasource(deps)(self)