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//lib/python3.6/site-packages/mockbuild/state.py

# -*- coding: utf-8 -*-
# vim: noai:ts=4:sw=4:expandtab

from .exception import StateError
from .trace_decorator import getLog

class State(object):
    def __init__(self, bootstrap=None):
        self._state = []
        # can be "unknown", "success" or "fail"
        self.result = "unknown"
        self.bootstrap = bootstrap
        self.state_log = getLog("mockbuild.Root.state")

def state(self):
        if not len(self._state):
            raise StateError("state called on empty state stack")
        return self._state[-1]

def start(self, state):
        if state is None:
            raise StateError("start called with None State")
        self._state.append(state)
        if self.bootstrap:
            self.state_log.info("Start(bootstrap): %s", state)
        else:
            self.state_log.info("Start: %s", state)

def finish(self, state):
        if len(self._state) == 0:
            raise StateError("finish called on empty state list")
        current = self._state.pop()
        if state != current:
            raise StateError("state finish mismatch: current: %s, state: %s" % (current, state))
        if self.bootstrap:
            self.state_log.info("Finish(bootstrap): %s", state)
        else:
            self.state_log.info("Finish: %s", state)

def alldone(self):
        if len(self._state) != 0:
            raise StateError("alldone called with pending states: %s" % ",".join(self._state))