def main(config=None):
'''
Main entry point.
'''
if config is not None:
try:
with open(config) as fh:
configuration = json.load(fh)
except Exception as e:
LOG.fatal("Failed to parse config file '%s': %s" % (config, e))
sys.exit(1)
else:
configuration = CONFIG
# And spawn it
dexter = Dexter(configuration)
dexter.run()
def _start(self):
'''
Start the system going.
'''
# Start the notifiers
try:
self._state.start()
except Exception as e:
LOG.fatal("Failed to start notifiers: %s" % (e, ))
sys.exit(1)
# And the components
for component in self._inputs + self._outputs + self._services:
# If these throw then it's fatal
LOG.info("Starting %s" % (component, ))
try:
component.start()
except Exception as e:
LOG.fatal("Failed to start %s: %s" % (component, e))
sys.exit(1)
def main(log_level=None, config=None):
"""
Dexter is a personal assistant which responds to natural language for its
commands.
"""
# Set the log level, if supplied
if log_level is not None:
try:
LOG.getLogger().setLevel(int(log_level))
except:
LOG.getLogger().setLevel(log_level.upper())
# Load in any configuration
if config is not None:
try:
with open(config) as fh:
configuration = json.load(fh)
except Exception as e:
LOG.fatal("Failed to parse config file '%s': %s" % (config, e))
sys.exit(1)
else:
configuration = CONFIG
# Handle environment variables in the component kwargs, in the form of
# "${VARNAME}". This isn't overly pretty, but it works.
for typ in configuration['components']:
# We might have kwargs for all the components
for component in configuration['components'][typ]:
(which, kwargs) = component
if kwargs is None:
continue
# Look at all the kwargs which we have and check for environment
# variables in the value names.
for name in kwargs:
value = kwargs[name]
try:
while True:
# Pull out the variable name, if it exists
start = value.index('${')
end = value.index('}', start)
varname = value[start + 2:end]
varvalue = os.environ.get(varname, '')
# Special handling for some variables
if not varvalue:
# These are not always set in the environment but
# people tend to expect it to be, so we are nice and
# provide them
if varname == "HOSTNAME":
varvalue = socket.gethostname()
elif varname == "USER":
varvalue = getpass.getuser()
# And replace it
value = (value[:start] + varvalue + value[end + 1:])
except:
# This means we failed to find the opening or closing
# varname container in the string, so we're done
pass
# If we changed it then save it back in
if value != kwargs[name]:
LOG.info(
"Expanded component %s:%s:%s argument from '%s' to '%s'"
% (typ, which, name, kwargs[name], value))
kwargs[name] = value
# And spawn it
dexter = Dexter(configuration)
dexter.run()
