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#!/usr/bin/env python
# -*- coding: utf-8 -*-
"""
g_sorcery.py
~~~~~~~~~~~~
the main module
:copyright: (c) 2013 by Jauhien Piatlicki
:license: GPL-2, see LICENSE for more details.
"""
import importlib
import os
import sys
from .compatibility import configparser
from .fileutils import FileJSON
from .exceptions import FileJSONError
from .logger import Logger
def main():
logger = Logger()
if len(sys.argv) < 2:
logger.error("no backend specified")
return -1
name = sys.argv[1]
cfg = name + '.json'
cfg_path = None
for path in '.', '~', '/etc/g-sorcery':
current = os.path.join(path, cfg)
if (os.path.isfile(current)):
cfg_path = path
break
if not cfg_path:
logger.error('no config file for ' + name + ' backend\n')
return -1
cfg_f = FileJSON(cfg_path, cfg, ['package'])
try:
config = cfg_f.read()
except FileJSONError as e:
logger.error('error loading config file for ' \
+ name + ': ' + str(e) + '\n')
return -1
backend = get_backend(config['package'])
if not backend:
logger.error("backend initialization failed, exiting")
return -1
config_file = None
for path in '.', '~', '/etc/g-sorcery':
config_file = os.path.join(path, "g-sorcery.cfg")
if (os.path.isfile(config_file)):
break
else:
config_file = None
if not config_file:
logger.error('no global config file\n')
return -1
global_config = configparser.ConfigParser()
global_config.read(config_file)
return backend.instance(sys.argv[2:], config, global_config)
def get_backend(package):
"""
Load backend by package name.
"""
logger = Logger()
try:
module = importlib.import_module(package + '.backend')
except ImportError as error:
logger.error("error importing backend: " + str(error))
return None
return module
if __name__ == "__main__":
sys.exit(main())
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