+
−# -*- coding: UTF-8 -*-
+
−# Copyright (c) 2010, Pascal Volk
+
−# See COPYING for distribution information.
+
−
+
−"""
+
−    VirtualMailManager.cli.CliConfig
+
−
+
−    Adds some interactive stuff to the Config class.
+
−"""
+
−
+
−from ConfigParser import RawConfigParser
+
−from shutil import copy2
+
−
+
−from VirtualMailManager import ENCODING
+
−from VirtualMailManager.Config import Config, ConfigValueError, LazyConfig
+
−from VirtualMailManager.errors import ConfigError
+
−from VirtualMailManager.cli import w_std
+
−from VirtualMailManager.constants.ERROR import VMM_TOO_MANY_FAILURES
+
−
+
−
+
−class CliConfig(Config):
+
−    """Adds the interactive ``configure`` method to the `Config` class
+
−    and overwrites `LazyConfig.set(), in order to update a single option
+
−    in the configuration file with a single command line command.
+
−    """
+
−
+
−    def configure(self, sections):
+
−        """Interactive method for configuring all options of the given
+
−        iterable ``sections`` object."""
+
−        input_fmt = _(u'Enter new value for option %(option)s \
+
−[%(current_value)s]: ')
+
−        failures = 0
+
−
+
−        w_std(_(u'Using configuration file: %s\n') % self._cfg_filename)
+
−        for s in sections:
+
−            w_std(_(u'* Configuration section: %r') % s)
+
−            for opt, val in self.items(s):
+
−                failures = 0
+
−                while True:
+
−                    newval = raw_input(input_fmt.encode(ENCODING, 'replace') %
+
−                                       {'option': opt, 'current_value': val})
+
−                    if newval and newval != val:
+
−                        try:
+
−                            LazyConfig.set(self, '%s.%s' % (s, opt), newval)
+
−                            break
+
−                        except (ValueError, ConfigValueError), e:
+
−                            w_std(_(u'Warning: %s') % e)
+
−                            failures += 1
+
−                            if failures > 2:
+
−                                raise ConfigError(
+
−                                    _(u'Too many failures - try again later.'),
+
−                                                  VMM_TOO_MANY_FAILURES)
+
−                    else:
+
−                        break
+
−            print
+
−        if self._modified:
+
−            self.__saveChanges()
+
−
+
−    def set(self, option, value):
+
−        """Set the value of an option.
+
−
+
−        If the new `value` has been set, the configuration file will be
+
−        immediately updated.
+
−
+
−        Throws a ``ValueError`` if `value` couldn't be converted to
+
−        ``LazyConfigOption.cls``"""
+
−        section, option_ = self._get_section_option(option)
+
−        val = self._cfg[section][option_].cls(value)
+
−        if self._cfg[section][option_].validate:
+
−            val = self._cfg[section][option_].validate(val)
+
−        # Do not write default values also skip identical values
+
−        if not self._cfg[section][option_].default is None:
+
−            old_val = self.dget(option)
+
−        else:
+
−            old_val = self.pget(option)
+
−        if val == old_val:
+
−            return
+
−        if not RawConfigParser.has_section(self, section):
+
−            self.add_section(section)
+
−        RawConfigParser.set(self, section, option_, val)
+
−        self.__saveChanges()
+
−
+
−    def __saveChanges(self):
+
−        """Writes changes to the configuration file."""
+
−        copy2(self._cfg_filename, self._cfg_filename + '.bak')
+
−        self._cfg_file = open(self._cfg_filename, 'w')
+
−        self.write(self._cfg_file)
+
−        self._cfg_file.close()