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dotbot/dotbot/dispatcher.py

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import os
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from .plugin import Plugin
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from .messenger import Messenger
from .context import Context
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class Dispatcher(object):
def __init__(self, base_directory):
self._log = Messenger()
self._setup_context(base_directory)
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self._load_plugins()
def _setup_context(self, base_directory):
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path = os.path.abspath(os.path.realpath(
os.path.expanduser(base_directory)))
if not os.path.exists(path):
raise DispatchError('Nonexistent base directory')
self._context = Context(path)
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def dispatch(self, tasks):
success = True
for task in tasks:
for action in task:
handled = False
if action == 'defaults':
self._context.set_defaults(task[action]) # replace, not update
handled = True
# keep going, let other plugins handle this if they want
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for plugin in self._plugins:
if plugin.can_handle(action):
try:
success &= plugin.handle(action, task[action])
handled = True
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except Exception as err:
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self._log.error(
'An error was encountered while executing action %s' %
action)
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self._log.debug(err)
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if not handled:
success = False
self._log.error('Action %s not handled' % action)
return success
def _load_plugins(self):
self._plugins = [plugin(self._context)
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for plugin in Plugin.__subclasses__()]
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class DispatchError(Exception):
pass