root/tags/v1.0/modipy.py

#!/usr/bin/python
#
# Apply changes defined in a configuration file

import sys
import traceback

from options import ChangeOptions
from confloader import ConfigLoader, ChangeController
from twisted.internet import reactor

import logging
log = logging.getLogger('modipy')

optparser = ChangeOptions()
optparser.parseOptions()

try:
    cfgldr = ConfigLoader(optparser.options, optparser.args)
except Exception, e:
    log.error("Cannot load configuration: %s", e)
    traceback.print_exc(e)
    
    sys.exit(1)
    pass

log.debug("changes to apply: %s", cfgldr.changes)
log.debug("total devices: %s", cfgldr.devices)

controller = ChangeController(cfgldr)

def mystop(ignored):
    log.debug("finished!")
    reactor.stop()
    pass

def errstop(failure):
    log.error("Changes not implemented ok!")
    tlog.err(failure)
    reactor.stop()

def go():
    d = controller.do_changes()        
    d.addCallbacks(mystop, errstop)

# Use callLater(0) syntax to trigger running of changes once
# the reactor has actually started, so it can be stopped cleanly.

if getattr(optparser.options, 'loadonly', False):
    log.info("Load only specified")
    reactor.callLater(0, mystop, None)
else:
    reactor.callLater(0, go)
    pass

reactor.run()