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import abc |
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import configparser |
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import os |
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from typing import Optional |
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from cleo import Command |
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from backuppc_clone.Config import Config |
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from backuppc_clone.DataLayer import DataLayer |
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from backuppc_clone.exception.BackupPcCloneException import BackupPcCloneException |
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from backuppc_clone.style.BackupPcCloneStyle import BackupPcCloneStyle |
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View Code Duplication |
class BaseCommand(Command, metaclass=abc.ABCMeta): |
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""" |
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Abstract parent command for (almost) all BackupPC Clone commands. |
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""" |
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# ------------------------------------------------------------------------------------------------------------------ |
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def __init__(self, name: Optional[str] = None) -> None: |
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""" |
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Object constructor. |
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""" |
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Command.__init__(self, name) |
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self._io: Optional[BackupPcCloneStyle] = None |
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""" |
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The output style. |
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""" |
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# ------------------------------------------------------------------------------------------------------------------ |
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def __validate_user(self) -> None: |
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""" |
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Validates that this command is not run under root. |
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""" |
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self._io.log_very_verbose('testing user') |
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if os.getuid() == 0: |
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raise BackupPcCloneException('Will not run this command under root') |
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# ------------------------------------------------------------------------------------------------------------------ |
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def __validate_config(self) -> None: |
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""" |
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Validates the configuration files. |
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""" |
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if self.input.has_argument('clone.cfg'): |
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self._io.log_very_verbose('validation configuration') |
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config_filename_clone = self.input.get_argument('clone.cfg') |
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config_clone = configparser.ConfigParser() |
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config_clone.read(config_filename_clone) |
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config_original = configparser.ConfigParser() |
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config_original.read(config_clone['Original']['config']) |
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if config_clone['Original']['name'] != config_original['BackupPC Clone']['name']: |
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raise BackupPcCloneException( |
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'Clone {} is not a clone of original {}'.format(config_clone['Original']['name'], |
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config_original['BackupPC Clone']['name'])) |
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# ------------------------------------------------------------------------------------------------------------------ |
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def ask(self, question: str, default: Optional[str] = None) -> Optional[str]: |
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""" |
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Prompt the user for input. |
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@param str question: The question to ask |
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@param str|None default: The default value |
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:rtype: str|None |
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""" |
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if default is not None: |
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question = question + ' [' + default + ']' |
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answer = self._io.ask(question, default) |
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if answer is None: |
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answer = default |
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return answer |
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# ------------------------------------------------------------------------------------------------------------------ |
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def _init_singletons(self) -> None: |
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""" |
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Initializes the singleton objects. |
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""" |
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Config(self.argument('clone.cfg')) |
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DataLayer(os.path.join(Config.instance.top_dir_clone, 'clone.db')) |
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# ------------------------------------------------------------------------------------------------------------------ |
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@abc.abstractmethod |
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def _handle_command(self) -> int: |
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""" |
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Executes the command. |
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:rtype: int |
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""" |
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raise NotImplementedError() |
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# ------------------------------------------------------------------------------------------------------------------ |
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def handle(self) -> int: |
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""" |
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Executes the command. |
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""" |
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try: |
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self._io = BackupPcCloneStyle(self.input, self.output) |
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self.__validate_user() |
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self.__validate_config() |
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self._init_singletons() |
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return self._handle_command() |
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except BackupPcCloneException as error: |
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self._io.error(str(error)) |
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return -1 |
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# ---------------------------------------------------------------------------------------------------------------------- |
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SetBased /
BackupPC-Clone
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