registry.py
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	# -- coding: utf-8 --
	##
	## This file is part of Invenio.
	## Copyright (C) 2013, 2014 CERN.
	##
	## Invenio is free software; you can redistribute it and/or
	## modify it under the terms of the GNU General Public License as
	## published by the Free Software Foundation; either version 2 of the
	## License, or (at your option) any later version.
	##
	## Invenio is distributed in the hope that it will be useful, but
	## WITHOUT ANY WARRANTY; without even the implied warranty of
	## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	## General Public License for more details.
	##
	## You should have received a copy of the GNU General Public License
	## along with Invenio; if not, write to the Free Software Foundation, Inc.,
	## 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.

	import operator
	import os

	from flask.ext.registry import PkgResourcesDirDiscoveryRegistry, \
	RegistryProxy, ImportPathRegistry


	legacy = RegistryProxy(
	'legacy', ImportPathRegistry, initial=['invenio.legacy.*'])

	doc_category = lambda namespace: RegistryProxy(
	'legacy.doc.' + namespace, PkgResourcesDirDiscoveryRegistry,
	'doc/'+namespace, registry_namespace=legacy)


	def doc_category_topics(namespace):
	"""Finds all topics in given category."""
	test = operator.methodcaller('endswith', '.webdoc')
	return dict(map(lambda filename: (os.path.basename(filename)[:-7],
	filename),
	filter(test, doc_category(namespace))))