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ipapython
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cli.py
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# # Copyright (C) 2015 FreeIPA Contributors see COPYING for license # """ Command line support. """ import collections import enum import logging import signal import six from ipapython import admintool, config from ipapython.ipa_log_manager import standard_logging_setup from ipapython.ipautil import (CheckedIPAddress, CheckedIPAddressLoopback, private_ccache) from . import core, common __all__ = ['install_tool', 'uninstall_tool'] if six.PY3: long = int NoneType = type(None) logger = logging.getLogger(__name__) def _get_usage(configurable_class): usage = '%prog [options]' for owner_cls, name in configurable_class.knobs(): knob_cls = getattr(owner_cls, name) if knob_cls.is_cli_positional(): if knob_cls.cli_metavar is not None: metavar = knob_cls.cli_metavar elif knob_cls.cli_names: metavar = knob_cls.cli_names[0].upper() else: metavar = name.replace('_', '-').upper() try: knob_cls.default except AttributeError: fmt = ' {}' else: fmt = ' [{}]' usage += fmt.format(metavar) return usage def install_tool(configurable_class, command_name, log_file_name, debug_option=False, verbose=False, console_format=None, use_private_ccache=True, uninstall_log_file_name=None): """ Some commands represent multiple related tools, e.g. ``ipa-server-install`` and ``ipa-server-install --uninstall`` would be represented by separate classes. Only their options are the same. :param configurable_class: the command class for options :param command_name: the command name shown in logs/output :param log_file_name: if None, logging is to stderr only :param debug_option: log level is DEBUG :param verbose: log level is INFO :param console_format: logging format for stderr :param use_private_ccache: a temporary ccache is created and used :param uninstall_log_file_name: if not None the log for uninstall """ if uninstall_log_file_name is not None: uninstall_kwargs = dict( configurable_class=configurable_class, command_name=command_name, log_file_name=uninstall_log_file_name, debug_option=debug_option, verbose=verbose, console_format=console_format, ) else: uninstall_kwargs = None return type( 'install_tool({0})'.format(configurable_class.__name__), (InstallTool,), dict( configurable_class=configurable_class, command_name=command_name, log_file_name=log_file_name, usage=_get_usage(configurable_class), debug_option=debug_option, verbose=verbose, console_format=console_format, uninstall_kwargs=uninstall_kwargs, use_private_ccache=use_private_ccache, ) ) def uninstall_tool(configurable_class, command_name, log_file_name, debug_option=False, verbose=False, console_format=None): return type( 'uninstall_tool({0})'.format(configurable_class.__name__), (UninstallTool,), dict( configurable_class=configurable_class, command_name=command_name, log_file_name=log_file_name, usage=_get_usage(configurable_class), debug_option=debug_option, verbose=verbose, console_format=console_format, ) ) class ConfigureTool(admintool.AdminTool): configurable_class = None debug_option = False verbose = False console_format = None use_private_ccache = True @staticmethod def _transform(configurable_class): raise NotImplementedError @classmethod def add_options( # pylint: disable=arguments-renamed cls, parser, positional=False ): transformed_cls = cls._transform(cls.configurable_class) if issubclass(transformed_cls, common.Interactive): parser.add_option( '-U', '--unattended', dest='unattended', default=False, action='store_true', help="unattended (un)installation never prompts the user", ) groups = collections.OrderedDict() # if no group is defined, add the option to the parser top level groups[None] = parser for owner_cls, name in transformed_cls.knobs(): knob_cls = getattr(owner_cls, name) if knob_cls.is_cli_positional() is not positional: continue group_cls = knob_cls.group() try: opt_group = groups[group_cls] except KeyError: opt_group = groups[group_cls] = config.OptionGroup( parser, "{0} options".format(group_cls.description)) parser.add_option_group(opt_group) knob_type = knob_cls.type if issubclass(knob_type, list): try: # typing.List[X].__parameters__ == (X,) knob_scalar_type = knob_type.__parameters__[0] except AttributeError: knob_scalar_type = str else: knob_scalar_type = knob_type kwargs = dict() if knob_scalar_type is NoneType: kwargs['type'] = None kwargs['const'] = True kwargs['default'] = False elif knob_scalar_type is str: kwargs['type'] = 'string' elif knob_scalar_type is int: kwargs['type'] = 'int' elif knob_scalar_type is long: kwargs['type'] = 'long' elif knob_scalar_type is CheckedIPAddressLoopback: kwargs['type'] = 'ip_with_loopback' elif knob_scalar_type is CheckedIPAddress: kwargs['type'] = 'ip' elif issubclass(knob_scalar_type, enum.Enum): kwargs['type'] = 'choice' kwargs['choices'] = [i.value for i in knob_scalar_type] kwargs['metavar'] = "{{{0}}}".format( ",".join(kwargs['choices'])) else: kwargs['type'] = 'constructor' kwargs['constructor'] = knob_scalar_type kwargs['dest'] = name if issubclass(knob_type, list): if kwargs['type'] is None: kwargs['action'] = 'append_const' else: kwargs['action'] = 'append' else: if kwargs['type'] is None: kwargs['action'] = 'store_const' else: kwargs['action'] = 'store' if knob_cls.sensitive: kwargs['sensitive'] = True if knob_cls.cli_metavar: kwargs['metavar'] = knob_cls.cli_metavar if not positional: cli_info = ( (knob_cls.deprecated, knob_cls.cli_names), (True, knob_cls.cli_deprecated_names), ) else: cli_info = ( (knob_cls.deprecated, (None,)), ) for hidden, cli_names in cli_info: opt_strs = [] for cli_name in cli_names: if cli_name is None: cli_name = '--{}'.format(name.replace('_', '-')) opt_strs.append(cli_name) if not opt_strs: continue if not hidden: help = knob_cls.description else: help = config.SUPPRESS_HELP opt_group.add_option( *opt_strs, help=help, **kwargs ) super(ConfigureTool, cls).add_options(parser, debug_option=cls.debug_option) def __init__(self, options, args): super(ConfigureTool, self).__init__(options, args) self.transformed_cls = self._transform(self.configurable_class) self.positional_arguments = [] for owner_cls, name in self.transformed_cls.knobs(): knob_cls = getattr(owner_cls, name) if knob_cls.is_cli_positional(): self.positional_arguments.append(name) # fake option parser to parse positional arguments # (because optparse does not support positional argument parsing) fake_option_parser = config.IPAOptionParser() self.add_options(fake_option_parser, True) fake_option_map = {option.dest: option for group in fake_option_parser.option_groups for option in group.option_list} for index, name in enumerate(self.positional_arguments): try: value = self.args.pop(0) except IndexError: break fake_option = fake_option_map[name] fake_option.process('argument {}'.format(index + 1), value, self.options, self.option_parser) def validate_options(self, needs_root=True): super(ConfigureTool, self).validate_options(needs_root=needs_root) if self.args: self.option_parser.error("Too many arguments provided") def _setup_logging(self, log_file_mode='w', no_file=False): if no_file: log_file_name = None elif self.options.log_file: log_file_name = self.options.log_file else: log_file_name = self.log_file_name standard_logging_setup( log_file_name, verbose=self.verbose, debug=self.options.verbose, console_format=self.console_format) if log_file_name: logger.debug('Logging to %s', log_file_name) elif not no_file: logger.debug('Not logging to a file') def init_configurator(self): """Executes transformation, getting a flattened Installer object :returns: common.installer.Installer object """ kwargs = {} transformed_cls = self._transform(self.configurable_class) knob_classes = {n: getattr(c, n) for c, n in transformed_cls.knobs()} for name in knob_classes: value = getattr(self.options, name, None) if value is not None: kwargs[name] = value if (issubclass(self.configurable_class, common.Interactive) and not self.options.unattended): kwargs['interactive'] = True try: return transformed_cls(**kwargs) except core.KnobValueError as e: knob_cls = knob_classes[e.name] try: index = self.positional_arguments.index(e.name) except ValueError: cli_name = knob_cls.cli_names[0] or e.name.replace('_', '-') desc = "option {0}".format(cli_name) else: desc = "argument {0}".format(index + 1) self.option_parser.error("{0}: {1}".format(desc, e)) except RuntimeError as e: self.option_parser.error(str(e)) return None def run(self): cfgr = self.init_configurator() signal.signal(signal.SIGTERM, self.__signal_handler) if self.use_private_ccache: with private_ccache(): super(ConfigureTool, self).run() return cfgr.run() else: super(ConfigureTool, self).run() return cfgr.run() @staticmethod def __signal_handler(signum, frame): raise KeyboardInterrupt class InstallTool(ConfigureTool): uninstall_kwargs = None _transform = staticmethod(common.installer) @classmethod def add_options(cls, parser, positional=False): super(InstallTool, cls).add_options(parser, positional) if cls.uninstall_kwargs is not None: parser.add_option( '--uninstall', dest='uninstall', default=False, action='store_true', help=("uninstall an existing installation. The uninstall can " "be run with --unattended option"), ) @classmethod def get_command_class(cls, options, args): if cls.uninstall_kwargs is not None and options.uninstall: uninstall_cls = uninstall_tool(**cls.uninstall_kwargs) uninstall_cls.option_parser = cls.option_parser return uninstall_cls else: return super(InstallTool, cls).get_command_class(options, args) class UninstallTool(ConfigureTool): _transform = staticmethod(common.uninstaller)