mirror of
https://github.com/avatao-content/baseimage-tutorial-framework
synced 2024-11-01 03:31:20 +00:00
79 lines
2.5 KiB
Python
79 lines
2.5 KiB
Python
import logging
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from os.path import join as joinpath
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from os.path import basename
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from os import makedirs
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from datetime import datetime
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from dateutil import parser as dateparser
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from .snapshot_provider import SnapshotProvider
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LOG = logging.getLogger(__name__)
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class SnapshotHandler:
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keys = ['snapshot']
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def __init__(self, *, directories, snapshots_dir, exclude_unix_patterns=None):
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self._snapshots_dir = snapshots_dir
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self.snapshot_providers = {}
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self._exclude_unix_patterns = exclude_unix_patterns
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self.init_snapshot_providers(directories)
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self.command_handlers = {
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'snapshot.take': self.handle_take_snapshot,
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'snapshot.restore': self.handle_restore_snapshot,
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'snapshot.exclude': self.handle_exclude
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}
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def init_snapshot_providers(self, directories):
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for index, directory in enumerate(directories):
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git_dir = self.init_git_dir(index, directory)
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self.snapshot_providers[directory] = SnapshotProvider(
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directory,
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git_dir,
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self._exclude_unix_patterns
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)
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def init_git_dir(self, index, directory):
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git_dir = joinpath(
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self._snapshots_dir,
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f'{basename(directory)}-{index}'
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)
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makedirs(git_dir, exist_ok=True)
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return git_dir
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def handle_event(self, message, _):
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try:
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self.command_handlers[message['key']](message)
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except KeyError:
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LOG.error('IGNORING MESSAGE: Invalid message received: %s', message)
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def handle_take_snapshot(self, _):
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LOG.debug('Taking snapshots of directories %s', self.snapshot_providers.keys())
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for provider in self.snapshot_providers.values():
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provider.take_snapshot()
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def handle_restore_snapshot(self, message):
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date = dateparser.parse(
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message.get(
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'value',
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datetime.now().isoformat()
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)
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)
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LOG.debug(
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'Restoring snapshots (@ %s) of directories %s',
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date,
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self.snapshot_providers.keys()
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)
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for provider in self.snapshot_providers.values():
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provider.restore_snapshot(date)
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def handle_exclude(self, message):
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exclude_unix_patterns = message['value']
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if not isinstance(exclude_unix_patterns, list):
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raise KeyError
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for provider in self.snapshot_providers.values():
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provider.exclude = exclude_unix_patterns
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