def release(self):
self.rewindable = []
self.non_rewindable = []
for step in self.instances:
self.log.info(screen_header(step))
try:
step()
except StopRelease as e:
self.log.critical(
'Release process stopped at step {0}:\n{1}'.format(
step, e))
self.rewind()
from sys import exit
exit(step.ERROR_CODE)
except Exception:
self.log.debug('Noooo!!!', exc_info=True)
self.rewind()
raise
else:
if step.success and hasattr(step, 'no_rollback'):
self.non_rewindable.append(step.no_rollback)
elif step.success and hasattr(step, 'rollback'):
self.rewindable.append(step)
self.log.info(
'Successfully released version {0}. '
'Sorry for the convenience, mcdonc!'.format(self.the_version))
def rewind(self):
say = self.log.critical
say('\n' + screen_header('ROLLBACK', decor='*'))
# Some steps offer a warning because they cannot be rolled back.
say('\n'.join(self.non_rewindable)) # Display them.
if not self.rewindable:
say('No steps to roll back, but the release process FAILED.')
return
steps = list(reversed(self.rewindable))
print('I am about to roll back the following steps:\n{0}'.format(
', '.join([str(step) for step in steps])))
if not bool_input('Continue?', default=True):
return
for step in steps:
self.log.critical(screen_header('ROLLBACK {0}'.format(step)))
try:
step.rollback()
except Exception as e:
self.log.error('Could not roll back step {0}:\n{1}'
.format(step, str(e)))
