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decorators.py
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decorators.py
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# -*- coding: utf-8 -*-
#
# This file is part of REANA.
# Copyright (C) 2018 CERN.
#
# REANA 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.
#
# REANA 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
# REANA; 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.
"""REANA command line decorators."""
import logging
import os
import sys
from click.core import Context
from reana_client.api import Client
def with_api_client(f):
"""Decorator to inject the REANA server API client to a Click command."""
def wrapper(*args, **kwargs):
"""Initialize config for API client.
This decorator should be used right after @click.pass_context since it
is injecting the API client inside the ``ctx`` object.
"""
# Since we require the @click.pass_context decorator to be passed
# before, we know ``ctx`` is the first argument.
ctx = args[0]
if isinstance(ctx, Context):
server_url = os.environ.get('REANA_SERVER_URL', None)
if not server_url:
logging.error(
'REANA client is not connected to any REANA cluster.\n'
'Please set REANA_SERVER_URL environment variable to '
'the remote REANA cluster you would like to connect to.\n'
'For example: export '
'REANA_SERVER_URL=https://reana.cern.ch/')
sys.exit(1)
logging.info('REANA server URL ($REANA_SERVER_URL) is: {}'
.format(server_url))
ctx.obj.client = Client(server_url)
else:
raise Exception(
'This decorator should be used after click.pass_context.')
f(*args, **kwargs)
return wrapper