ext: create flask extension

Signed-off-by: Jacopo Notarstefano <jacopo.notarstefano@cern.ch>

invenio_xrootd/ext.py

@@ -0,0 +1,56 @@
+# -*- coding: utf-8 -*-
+#
+# This file is part of Invenio.
+# Copyright (C) 2017 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.
+#
+# In applying this license, CERN does not
+# waive the privileges and immunities granted to it by virtue of its status
+# as an Intergovernmental Organization or submit itself to any jurisdiction.
+
+"""Flask extension for Invenio-XRootD."""
+
+from __future__ import absolute_import, print_function
+
+from pkg_resources import DistributionNotFound, get_distribution
+
+try:
+    # Import XRootDPyFS if available so that its
+    # opener gets registered on PyFilesystem.
+    get_distribution('xrootdpyfs')
+    import xrootdpyfs
+    XROOTD_ENABLED = True
+except DistributionNotFound:
+    XROOTD_ENABLED = False
+    xrootdpyfs = None
+
+
+class InvenioXRootD(object):
+    """Invenio-XRootD extension."""
+
+    def __init__(self, app=None):
+        """Extension initialization."""
+        if app:
+            self.init_app(app)
+
+    def init_app(self, app):
+        """Extension registration and configuration."""
+        app.config['XROOTD_ENABLED'] = XROOTD_ENABLED
+        if XROOTD_ENABLED:
+            app.config['FILES_REST_STORAGE_FACTORY'] = \
+                'invenio_xrootd:eos_storage_factory'
+        app.extensions['inspire-xrootd'] = self

setup.py

@@ -1,7 +1,7 @@
 # -*- coding: utf-8 -*-
 #
 # This file is part of Invenio.
-# Copyright (C) 2016 CERN.
+# Copyright (C) 2016, 2017 CERN.
 #
 # Invenio is free software; you can redistribute it
 # and/or modify it under the terms of the GNU General Public License as
@@ -86,6 +86,12 @@
     include_package_data=True,
     platforms='any',
     entry_points={
+        'invenio_base.api_apps': [
+            'invenio_xrootd = invenio_xrootd.ext:InvenioXRootD',
+        ],
+        'invenio_base.apps': [
+            'invenio_xrootd = invenio_xrootd.ext:InvenioXRootD',
+        ],
     },
     extras_require=extras_require,
     install_requires=install_requires,