move Object class into its own file
Signed-off-by: Steven Armstrong <steven@icarus.ethz.ch>
This commit is contained in:
Steven Armstrong
parent
a4abb53ced
commit
cdba503ff2
1 changed files with 37 additions and 288 deletions
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@ -1,292 +1,37 @@
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# -*- coding: utf-8 -*-
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#
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# 2010-2011 Steven Armstrong (steven-cdist at armstrong.cc)
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#
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# This file is part of cdist.
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#
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# cdist is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# cdist is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with cdist. If not, see <http://www.gnu.org/licenses/>.
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#
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#
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import os
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import tempfile
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# FIXME: change these to match your environment
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os.environ['__cdist_base_dir'] = '/home/sar/vcs/cdist'
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# FIXME: testing against the cache, change path
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os.environ['__cdist_out_dir'] = '/home/sar/vcs/cdist/cache/sans-asteven-02.ethz.ch/out'
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'''
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cd /path/to/dir/with/this/file
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ipython
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In [1]: import oo
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In [2]: t = oo.Type('__mkfs')
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In [3]: t.
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t.base_dir t.is_install t.list_type_names t.name t.path
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t.explorers t.is_singleton t.list_types t.optional_parameters t.required_parameters
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In [3]: t.path
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Out[3]: '/home/sar/vcs/cdist/conf/type/__mkfs'
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In [4]: t.required_parameters
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Out[4]: ['type']
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In [5]: t.optional_parameters
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Out[5]: ['device', 'options', 'blocks']
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In [6]: t.is
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t.is_install t.is_singleton
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In [6]: t.is_singleton
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Out[6]: False
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In [7]: o = oo.Object(t, 'dev/sda1')
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In [8]: o.
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o.base_dir o.list_object_names o.list_type_names o.parameter o.qualified_name o.type
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o.changed o.list_objects o.object_id o.path o.requirements
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In [8]: o.pa
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o.parameter o.path
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In [8]: o.path
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Out[8]: '/home/sar/vcs/cdist/cache/sans-asteven-02.ethz.ch/out/object/__mkfs/dev/sda1/.cdist'
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In [9]: o.changed
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Out[9]: False
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In [10]: o.changed = True
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In [11]: # creates /home/sar/vcs/cdist/cache/sans-asteven-02.ethz.ch/out/object/__mkfs/dev/sda1/.cdist/changed
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In [12]: o.changed
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Out[12]: True
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In [13]: o.changed = False
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In [14]: # removes /home/sar/vcs/cdist/cache/sans-asteven-02.ethz.ch/out/object/__mkfs/dev/sda1/.cdist/changed
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In [15]:
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-----
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In [1]: import oo
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In [2]: oo.Type.
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oo.Type.base_dir oo.Type.is_install oo.Type.list_type_names oo.Type.mro oo.Type.path
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oo.Type.explorers oo.Type.is_singleton oo.Type.list_types oo.Type.optional_parameters oo.Type.required_parameters
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In [2]: oo.Type.list
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oo.Type.list_type_names oo.Type.list_types
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In [2]: oo.Type.list_type_names()
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Out[2]:
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['__addifnosuchline',
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'__apt_ppa',
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'__apt_update_index',
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'__autofs_map',
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'__autofs_master',
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'__debconf_set_selections',
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'__directory',
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'__file',
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'__group',
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'__issue',
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'__key_value',
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'__link',
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'__mkfs',
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'__motd',
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'__package',
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'__package_apt',
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'__package_pacman',
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'__package_pkg_openbsd',
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'__package_rubygem',
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'__package_yum',
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'__partition_msdos',
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'__partition_msdos_apply',
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'__postgres_database',
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'__postgres_role',
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'__process',
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'__removeline',
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'__ssh_authorized_key',
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'__timezone',
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'__user']
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In [3]: list(oo.Type.list_types())
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Out[3]:
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[<Type name=__addifnosuchline>,
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<Type name=__apt_ppa>,
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<Type name=__apt_update_index>,
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<Type name=__autofs_map>,
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<Type name=__autofs_master>,
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<Type name=__debconf_set_selections>,
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<Type name=__directory>,
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<Type name=__file>,
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<Type name=__group>,
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<Type name=__issue>,
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<Type name=__key_value>,
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<Type name=__link>,
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<Type name=__mkfs>,
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<Type name=__motd>,
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<Type name=__package>,
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<Type name=__package_apt>,
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<Type name=__package_pacman>,
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<Type name=__package_pkg_openbsd>,
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<Type name=__package_rubygem>,
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<Type name=__package_yum>,
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<Type name=__partition_msdos>,
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<Type name=__partition_msdos_apply>,
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<Type name=__postgres_database>,
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<Type name=__postgres_role>,
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<Type name=__process>,
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<Type name=__removeline>,
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<Type name=__ssh_authorized_key>,
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<Type name=__timezone>,
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<Type name=__user>]
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In [4]:
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In [4]: oo.Object.
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oo.Object.base_dir oo.Object.changed oo.Object.list_object_names oo.Object.list_objects oo.Object.list_type_names oo.Object.mro oo.Object.path
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In [4]: oo.Object.list
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oo.Object.list_object_names oo.Object.list_objects oo.Object.list_type_names
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In [4]: oo.Object.list_ob
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oo.Object.list_object_names oo.Object.list_objects
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In [4]: oo.Object.list_object_names()
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Out[4]: <generator object list_object_names at 0x1b759b0>
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In [5]: list(oo.Object.list_object_names())
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Out[5]:
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['__mkfs/dev/sda1',
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'__mkfs/dev/sda2',
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'__mkfs/dev/sda5',
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'__mkfs/dev/sda6',
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'__mkfs/dev/sda7',
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'__partition_msdos/dev/sda1',
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'__partition_msdos/dev/sda2',
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'__partition_msdos/dev/sda3',
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'__partition_msdos/dev/sda5',
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'__partition_msdos/dev/sda6',
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'__partition_msdos/dev/sda7',
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'__partition_msdos_apply/singleton']
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In [6]: list(oo.Object.list_objects())
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Out[6]:
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[<Object __mkfs/dev/sda1>,
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<Object __mkfs/dev/sda2>,
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<Object __mkfs/dev/sda5>,
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<Object __mkfs/dev/sda6>,
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<Object __mkfs/dev/sda7>,
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<Object __partition_msdos/dev/sda1>,
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<Object __partition_msdos/dev/sda2>,
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<Object __partition_msdos/dev/sda3>,
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<Object __partition_msdos/dev/sda5>,
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<Object __partition_msdos/dev/sda6>,
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<Object __partition_msdos/dev/sda7>,
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<Object __partition_msdos_apply/singleton>]
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In [7]:
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'''
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class Type(object):
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@staticmethod
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def base_dir():
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"""Return the absolute path to the top level directory where types
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are defined.
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Requires the environment variable '__cdist_base_dir' to be set.
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"""
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return os.path.join(
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os.environ['__cdist_base_dir'],
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'conf',
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'type'
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)
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@classmethod
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def list_types(cls):
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"""Return a list of type instances"""
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for type_name in cls.list_type_names():
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yield cls(type_name)
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@classmethod
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def list_type_names(cls):
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"""Return a list of type names"""
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return os.listdir(cls.base_dir())
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def __init__(self, name):
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self.name = name
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self.__explorers = None
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self.__required_parameters = None
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self.__optional_parameters = None
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def __repr__(self):
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return '<Type name=%s>' % self.name
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@property
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def path(self):
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return os.path.join(
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self.base_dir(),
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self.name
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)
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@property
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def is_singleton(self):
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"""Check whether a type is a singleton."""
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return os.path.isfile(os.path.join(self.path, "singleton"))
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@property
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def is_install(self):
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"""Check whether a type is used for installation (if not: for configuration)"""
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return os.path.isfile(os.path.join(self.path, "install"))
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@property
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def explorers(self):
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"""Return a list of available explorers"""
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if not self.__explorers:
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try:
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self.__explorers = os.listdir(os.path.join(self.path, "explorer"))
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except EnvironmentError as e:
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# error ignored
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self.__explorers = []
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return self.__explorers
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@property
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def required_parameters(self):
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"""Return a list of required parameters"""
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if not self.__required_parameters:
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parameters = []
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try:
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with open(os.path.join(self.path, "parameter", "required")) as fd:
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for line in fd:
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parameters.append(line.strip())
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except EnvironmentError as e:
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# error ignored
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pass
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finally:
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self.__required_parameters = parameters
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return self.__required_parameters
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@property
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def optional_parameters(self):
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"""Return a list of optional parameters"""
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if not self.__optional_parameters:
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parameters = []
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try:
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with open(os.path.join(self.path, "parameter", "optional")) as fd:
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for line in fd:
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parameters.append(line.strip())
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except EnvironmentError as e:
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# error ignored
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pass
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finally:
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self.__optional_parameters = parameters
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return self.__optional_parameters
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import cdist
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class Object(object):
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"""Represents a cdist object.
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All interaction with objects in cdist should be done through this class.
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Directly accessing an object through the file system from python code is
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a bug.
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"""
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@staticmethod
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def base_dir():
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@ -296,10 +41,14 @@ class Object(object):
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Requires the environment variable '__cdist_out_dir' to be set.
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"""
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try:
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base_dir = os.path.join(
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os.environ['__cdist_out_dir'],
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'object'
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)
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except KeyError as e:
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raise cdist.MissingEnvironmentVariableError(e.args[0])
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# FIXME: should directory be created elsewhere?
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if not os.path.isdir(base_dir):
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os.mkdir(base_dir)
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