def _set_volume(self, option):
if self._volume is not None:
return
if option is not None and 'volume' in option:
self._volume = option['volume']
return
volume_options = _get_volume_options()
logging.error('volume_options %s', volume_options)
if not volume_options['options']:
raise PreConditionsError(_('Please connect a device to continue'))
volume = _value_if_one_option(volume_options)
if volume is not None:
self._volume = volume
return
raise PreConditionsChoose(_('Select your volume'), volume_options)
def _set_checkpoint(self, option):
if self._checkpoint is not None:
return
if option is not None and 'checkpoint' in option:
self._checkpoint = option['checkpoint']
return
checkpoint_options = _get_checkpoint_options(self._volume)
if not checkpoint_options['options']:
raise PreConditionsError(_('No checkpoints found in the device'))
checkpoint = _value_if_one_option(checkpoint_options)
if checkpoint is not None:
self._checkpoint = checkpoint
return
raise PreConditionsChoose(_('Select your checkpoint'),
checkpoint_options)