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#
# Copyright (C) 2015 FreeIPA Contributors see COPYING for license
#
"""
Common stuff.
"""
import traceback
from . import core
from .util import from_
__all__ = ['step', 'Installable', 'Interactive', 'Continuous', 'installer',
'uninstaller']
def step():
def decorator(func):
cls = core.Component(Step)
cls._installer = staticmethod(func)
return cls
return decorator
class Installable(core.Configurable):
"""
Configurable which does install or uninstall.
"""
uninstalling = core.Property(False)
def _get_components(self):
components = super(Installable, self)._get_components()
if self.uninstalling:
components = reversed(list(components))
return components
def _configure(self):
if self.uninstalling:
return self._uninstall()
else:
return self._install()
def _install(self):
assert not hasattr(super(Installable, self), '_install')
return super(Installable, self)._configure()
def _uninstall(self):
assert not hasattr(super(Installable, self), '_uninstall')
return super(Installable, self)._configure()
class Step(Installable):
@property
def parent(self):
raise AttributeError('parent')
def _install(self):
for nothing in self._installer(self.parent):
yield from_(super(Step, self)._install())
@staticmethod
def _installer(obj):
yield
def _uninstall(self):
for nothing in self._uninstaller(self.parent):
yield from_(super(Step, self)._uninstall())
@staticmethod
def _uninstaller(obj):
yield
@classmethod
def uninstaller(cls, func):
cls._uninstaller = staticmethod(func)
return cls
class Interactive(core.Configurable):
interactive = core.Property(False)
class Continuous(core.Configurable):
def _handle_exception(self, exc_info):
try:
super(Continuous, self)._handle_exception(exc_info)
except BaseException as e:
self.log.debug(traceback.format_exc())
if isinstance(e, Exception):
self.log.error("%s", e)
def installer(cls):
class Installer(cls, Installable):
def __init__(self, **kwargs):
super(Installer, self).__init__(uninstalling=False,
**kwargs)
Installer.__name__ = 'installer({0})'.format(cls.__name__)
return Installer
def uninstaller(cls):
class Uninstaller(Continuous, cls, Installable):
def __init__(self, **kwargs):
super(Uninstaller, self).__init__(uninstalling=True,
**kwargs)
Uninstaller.__name__ = 'uninstaller({0})'.format(cls.__name__)
return Uninstaller
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