def load_config(configfile=None, caller=None):
""" Load configuration definitions.
(This is really scary, actually. We are trusting that the
config.py we are taking as input is sane!)
If both the commandline and the parameter are
specified then the commandline takes precedence.
"""
# '/home/pnijjar/watcamp/python_rss/gcal_helpers/config.py'
# See: http://www.karoltomala.com/blog/?p=622
DEFAULT_CONFIG_SOURCEFILE = os.path.join(
os.getcwd(),
'config.py',
)
config_location = None
if configfile:
config_location = configfile
else:
config_location = DEFAULT_CONFIG_SOURCEFILE
# Now parse commandline options (Here??? This code smells bad.)
parser = argparse.ArgumentParser(
description="Generate fun RSS/newsletter feeds from "
"Google Calendar entries.",
formatter_class=argparse.ArgumentDefaultsHelpFormatter,
)
parser.add_argument(
'-c',
'--configfile',
help='configuration file location',
default=config_location,
)
# HACK HACK HACK. send_tweet needs to load the config file,
# but needs an additional parameter.
if caller == 'send_tweet':
parser.add_argument(
'--tweet-id',
help='ID of file containing tweet',
required=True,
)
args = parser.parse_args()
if args.configfile:
config_location = os.path.abspath(args.configfile)
# http://stackoverflow.com/questions/11990556/python-how-to-make-global
global config
# Blargh. You can load modules from paths, but the syntax is
# different depending on the version of python.
# http://stackoverflow.com/questions/67631/how-to-import-a-mod
# https://stackoverflow.com/questions/1093322/how-do-i-ch
if sys.version_info >= (3, 5):
import importlib.util
spec = importlib.util.spec_from_file_location(
'config',
config_location,
)
config = importlib.util.module_from_spec(spec)
spec.loader.exec_module(config)
elif sys.version_info >= (3, 3):
# This is the only one I can test. Sad!
from importlib.machinery import SourceFileLoader
config = SourceFileLoader(
'config',
config_location,
).load_module()
else:
import imp
config = imp.load_source(
'config',
config_location,
)
if caller == 'send_tweet' and args.tweet_id:
config.TWEET_ID = args.tweet_id
# Needed to send tweets
config.CONFIG_LOCATION = config_location
# For test harness
return config
