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# Copyright 2015-2016 Lars Wirzenius
#
# 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, see <http://www.gnu.org/licenses/>.
#
# =*= License: GPL-3+ =*=
import obnamlib
_short_key_names = {
obnamlib.REPO_FILE_TEST_KEY: 'T',
obnamlib.REPO_FILE_USERNAME: 'U',
obnamlib.REPO_FILE_GROUPNAME: 'G',
obnamlib.REPO_FILE_SYMLINK_TARGET: 'S',
obnamlib.REPO_FILE_XATTR_BLOB: 'X',
obnamlib.REPO_FILE_MD5: '5',
obnamlib.REPO_FILE_MODE: 'M',
obnamlib.REPO_FILE_MTIME_SEC: 'ms',
obnamlib.REPO_FILE_MTIME_NSEC: 'mn',
obnamlib.REPO_FILE_ATIME_SEC: 'as',
obnamlib.REPO_FILE_ATIME_NSEC: 'an',
obnamlib.REPO_FILE_NLINK: 'N',
obnamlib.REPO_FILE_SIZE: 's',
obnamlib.REPO_FILE_UID: 'u',
obnamlib.REPO_FILE_GID: 'g',
obnamlib.REPO_FILE_BLOCKS: 'B',
obnamlib.REPO_FILE_DEV: 'D',
obnamlib.REPO_FILE_INO: 'I',
obnamlib.REPO_FILE_SHA224: '224',
obnamlib.REPO_FILE_SHA256: '256',
obnamlib.REPO_FILE_SHA384: '384',
obnamlib.REPO_FILE_SHA512: '512',
}
# Let's make sure we have no duplicate values.
assert len(_short_key_names) == len(_short_key_names.values())
_key_from_short = dict((v, k) for k, v in _short_key_names.items())
class GADirectory(object):
def __init__(self):
self._dict = {
'metadata': {},
'subdirs': {},
}
self._mutable = True
def is_mutable(self):
return self._mutable
def set_immutable(self):
self._mutable = False
def as_dict(self):
return self._dict
def set_from_dict(self, a_dict):
self._dict = a_dict
def add_file(self, basename):
if basename not in self._dict['metadata']:
self._require_mutable()
self._dict['metadata'][basename] = {
'chunk-ids': [],
}
def _require_mutable(self):
if not self._mutable:
raise GAImmutableError()
def remove_file(self, basename):
if basename in self._dict['metadata']:
self._require_mutable()
if basename in self._dict['metadata']:
del self._dict['metadata'][basename]
def get_file_basenames(self):
return self._dict['metadata'].keys()
def get_file_key(self, basename, key):
short_name = self.get_short_key_name(key)
return self._dict['metadata'][basename].get(short_name)
def set_file_key(self, basename, key, value):
short_name = self.get_short_key_name(key)
old_value = self._dict['metadata'][basename].get(short_name, None)
if value != old_value:
self._require_mutable()
self._dict['metadata'][basename][short_name] = value
def get_short_key_name(self, key):
'''Translate a key id to a short key name.
This is similar to obnamlib.repo_key_name, but the name is
guaranteed to be short, while still being unique. The length
matters, as these names will be used a lot.
'''
return _short_key_names[key]
def get_key_from_short_name(self, short_name):
'''Inverse of get_short_key_name.'''
return _key_from_short[short_name]
def get_file_chunk_ids(self, basename):
return self._dict['metadata'][basename]['chunk-ids']
def append_file_chunk_id(self, basename, chunk_id):
self._require_mutable()
self._dict['metadata'][basename]['chunk-ids'].append(chunk_id)
def clear_file_chunk_ids(self, basename):
self._require_mutable()
self._dict['metadata'][basename]['chunk-ids'] = []
def get_subdir_basenames(self):
return self._dict['subdirs'].keys()
def add_subdir(self, basename, obj_id):
self._require_mutable()
self._dict['subdirs'][basename] = obj_id
def remove_subdir(self, basename):
self._require_mutable()
if basename in self._dict['subdirs']:
del self._dict['subdirs'][basename]
def get_subdir_object_id(self, basename):
return self._dict['subdirs'].get(basename)
class GAImmutableError(obnamlib.ObnamError):
msg = 'Attempt to modify an immutable GADirectory'
def create_gadirectory_from_dict(a_dict):
dir_obj = GADirectory()
dir_obj.set_from_dict(a_dict)
return dir_obj
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