137 lines
4.6 KiB
Python
137 lines
4.6 KiB
Python
# Copyright 2015 Canonical, Ltd.
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Affero General Public License as
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# published by the Free Software Foundation, either version 3 of the
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# License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Affero General Public License for more details.
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#
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# You should have received a copy of the GNU Affero General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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import asyncio
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import json
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import logging
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import os
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from subiquitycore.context import (
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Context,
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)
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from subiquitycore.controllerset import ControllerSet
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from subiquitycore.pubsub import MessageHub
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log = logging.getLogger('subiquitycore.core')
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class Application:
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# A concrete subclass must set project and controllers attributes, e.g.:
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#
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# project = "subiquity"
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# controllers = [
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# "Welcome",
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# "Network",
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# "Filesystem",
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# "Identity",
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# "InstallProgress",
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# ]
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# The 'next_screen' and 'prev_screen' methods move through the list of
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# controllers in order, calling the make_ui method on the controller
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# instance.
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def __init__(self, opts):
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self._exc = None
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self.debug_flags = ()
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if opts.dry_run:
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# Recognized flags are:
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# - install-fail: makes curtin install fail by replaying curtin
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# events from a failed installation, see
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# subiquity/controllers/installprogress.py
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# - bpfail-full, bpfail-restricted: makes block probing fail, see
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# subiquitycore/prober.py
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# - copy-logs-fail: makes post-install copying of logs fail, see
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# subiquity/controllers/installprogress.py
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self.debug_flags = os.environ.get('SUBIQUITY_DEBUG', '').split(',')
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self.opts = opts
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opts.project = self.project
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self.root = '/'
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if opts.dry_run:
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self.root = opts.output_base
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self.state_dir = os.path.join(self.root, 'run', self.project)
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os.makedirs(self.state_path('states'), exist_ok=True)
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self.scale_factor = float(
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os.environ.get('SUBIQUITY_REPLAY_TIMESCALE', "1"))
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self.updated = os.path.exists(self.state_path('updating'))
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self.hub = MessageHub()
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asyncio.get_running_loop().set_exception_handler(
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self._exception_handler)
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self.load_controllers(self.controllers)
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self.context = Context.new(self)
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self.exit_event = asyncio.Event()
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def load_controllers(self, controllers):
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""" Load the corresponding list of controllers
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Those will need to be restarted if already started """
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self.controllers = ControllerSet(
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self.controllers_mod, controllers,
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init_args=(self,))
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def _exception_handler(self, loop, context):
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exc = context.get('exception')
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if exc:
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self.exit_event.set()
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self._exc = exc
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else:
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loop.default_exception_handler(context)
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def state_path(self, *parts):
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return os.path.join(self.state_dir, *parts)
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def save_state(self):
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cur = self.controllers.cur
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if cur is None:
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return
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with open(self.state_path('states', cur.name), 'w') as fp:
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json.dump(cur.serialize(), fp)
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def report_start_event(self, context, description):
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log = logging.getLogger(context.full_name())
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level = getattr(logging, context.level)
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log.log(level, "start: %s", description)
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def report_finish_event(self, context, description, status):
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log = logging.getLogger(context.full_name())
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level = getattr(logging, context.level)
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log.log(level, "finish: %s %s", description, status.name)
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# EventLoop -------------------------------------------------------------------
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def exit(self):
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self.exit_event.set()
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def start_controllers(self):
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log.debug("starting controllers")
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for controller in self.controllers.instances:
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controller.start()
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log.debug("controllers started")
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async def start(self):
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self.controllers.load_all()
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self.start_controllers()
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async def run(self):
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self.base_model = self.make_model()
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asyncio.create_task(self.start())
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await self.exit_event.wait()
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if self._exc:
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exc, self._exc = self._exc, None
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raise exc
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