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from repoze.bfg.request import Request
def get_root(app, request=None):
""" Return a tuple composed of ``(root, closer)`` when provided a
:class:`repoze.bfg.router.Router` instance as the ``app``
argument. The ``root`` returned is the application root object.
The ``closer`` returned is a callable (accepting no arguments)
that should be called when your scripting application is finished
using the root. If ``request`` is not None, it is used as the
request passed to the :mod:`repoze.bfg` application root factory.
A request is constructed and passed to the root factory if
``request`` is None."""
registry = app.registry
if request is None:
request = Request.blank('/')
request.registry = registry
threadlocals = {'registry':registry, 'request':request}
app.threadlocal_manager.push(threadlocals)
def closer(request=request): # keep request alive via this function default
app.threadlocal_manager.pop()
root = app.root_factory(request)
return root, closer
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