_uuid.py 2.04 KB
##############################################################################
#
# Copyright (c) 2010 Vifib SARL and Contributors. All Rights Reserved.
#
# WARNING: This program as such is intended to be used by professional
# programmers who take the whole responsibility of assessing all potential
# consequences resulting from its eventual inadequacies and bugs
# End users who are looking for a ready-to-use solution with commercial
# guarantees and support are strongly adviced to contract a Free Software
# Service Company
#
# This program is Free Software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 3
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
#
##############################################################################

import uuid

import os

from slapos.recipe.librecipe import GenericBaseRecipe

class Recipe(GenericBaseRecipe):

    def _options(self, options):
        write = True
        if os.path.exists(options['cache-file']):
            with open(options['cache-file'], 'r') as cache_file:
                try:
                    generated_uuid = uuid.UUID(hex=cache_file.read())
                    write = False
                except ValueError:
                    generated_uuid = uuid.uuid4()
        else:
            generated_uuid = uuid.uuid4()

        if write:
            with open(options['cache-file'], 'w') as cache_file:
                cache_file.write(generated_uuid.hex)

        options['uuid'] = generated_uuid.hex

    def install(self):
        return []