Testing charm locally by overriding charmhelpers log and config

charm-local.py

# Override "log" and "config" methods from charmhelpers
# so that they work outside of a juju context

# from charmhelpers.core.hookenv import config
# from charmhelpers.core.host import log
import yaml


def log(message):
    print message


config_data = {}

with open(path.join(charm_dir, 'config.yaml')) as default_config_file:
    default_yaml_data = yaml.load(default_config_file)

    for option, settings in default_yaml_data['options'].iteritems():
        config_data[option] = settings.get('default', '')

with open('config.yaml') as config_file:
    yaml_data = yaml.load(config_file)

    for option, value in yaml_data['apache2-wsgi'].iteritems():
        config_data[option] = value


def config(key):
    if key not in config_data:
        raise Exception("Not a config option")

    return config_data[key]