Synnefo » ./kamaki

# Copyright 2011-2012 GRNET S.A. All rights reserved.

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import os

from collections import defaultdict

from ConfigParser import RawConfigParser, NoOptionError, NoSectionError

try:

    from collections import OrderedDict

except ImportError:

    from ordereddict import OrderedDict

# Path to the file that stores the configuration

CONFIG_PATH = os.path.expanduser('~/.kamakirc')

# Name of a shell variable to bypass the CONFIG_PATH value

CONFIG_ENV = 'KAMAKI_CONFIG'

HEADER = """

# Kamaki configuration file

"""

DEFAULTS = {

    'global': {

        'colors': 'on',

        'token': ''

    },

    'compute': {

        'enable': 'on',

        'cyclades_extensions': 'on',

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

        'token': ''

    },

    'image': {

        'enable': 'on',

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

        'token': ''

    },

    'storage': {

        'enable': 'on',

        'pithos_extensions': 'on',

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

        'account': '',

        'container': '',

        'token': ''

    },

    'astakos': {

        'enable': 'on',

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

        'token': ''

    }

}

class Config(RawConfigParser):

    def __init__(self, path=None):

        RawConfigParser.__init__(self, dict_type=OrderedDict)

        self.path = path or os.environ.get(CONFIG_ENV, CONFIG_PATH)

        self._overrides = defaultdict(dict)

        self.read(self.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):

            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:

            os.chmod(self.path, 0600)

            f.write(HEADER.lstrip())

            RawConfigParser.write(self, f)