Synnefo » ./kamaki

# Copyright 2011 GRNET S.A. All rights reserved.

#

# Redistribution and use in source and binary forms, with or

# without modification, are permitted provided that the following

# conditions are met:

#

#   1. Redistributions of source code must retain the above

#      copyright notice, this list of conditions and the following

#      disclaimer.

#

#   2. Redistributions in binary form must reproduce the above

#      copyright notice, this list of conditions and the following

#      disclaimer in the documentation and/or other materials

#      provided with the distribution.

#

# THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS

# OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED

# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR

# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

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from collections import defaultdict

from ConfigParser import RawConfigParser, NoOptionError, NoSectionError

from .utils import OrderedDict

HEADER = """

# Kamaki configuration file

"""

DEFAULTS = {

    'global': {

        'colors': 'on',

        'token': ''

    },

    'compute': {

        'enable': 'on',

        'cyclades_extensions': 'on',

        'url': 'https://okeanos.grnet.gr/api/v1.1',

        'token': ''

    },

    'image': {

        'enable': 'on',

        'url': 'https://okeanos.grnet.gr/plankton',

        'token': ''

    },

    'storage': {

        'enable': 'on',

        'pithos_extensions': 'on',

        'url': 'https://plus.pithos.grnet.gr/v1',

        'account': '',

        'container': '',

        'token': ''

    }

}

class Config(RawConfigParser):

    def __init__(self, path=None):

        RawConfigParser.__init__(self, dict_type=OrderedDict)

        self.path = path

        self._overrides = defaultdict(dict)

        self.read(path)

    def sections(self):

        return DEFAULTS.keys()

    def get(self, section, option):

        value = self._overrides.get(section, {}).get(option)

        if value is not None:

            return value

        try:

            return RawConfigParser.get(self, section, option)

        except (NoSectionError, NoOptionError) as e:

            return DEFAULTS.get(section, {}).get(option)

    def set(self, section, option, value):

        if section not in RawConfigParser.sections(self):

            self.add_section(section)

        RawConfigParser.set(self, section, option, value)

    def remove_option(self, section, option):

        try:

            RawConfigParser.remove_option(self, section, option)

        except NoSectionError:

            pass

    def items(self, section, include_defaults=False):

        d = dict(DEFAULTS[section]) if include_defaults else {}

        try:

            d.update(RawConfigParser.items(self, section))

        except NoSectionError:

            pass

        return d.items()

    def override(self, section, option, value):

        self._overrides[section][option] = value

    def write(self):

        with open(self.path, 'w') as f:

            f.write(HEADER.lstrip())

            RawConfigParser.write(self, f)