/usr/lib/python2.7/dist-packages/cvs2svn_lib/cvs_item_database.py is in cvs2svn 2.4.0-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 | # (Be in -*- python -*- mode.)
#
# ====================================================================
# Copyright (c) 2000-2008 CollabNet. All rights reserved.
#
# This software is licensed as described in the file COPYING, which
# you should have received as part of this distribution. The terms
# are also available at http://subversion.tigris.org/license-1.html.
# If newer versions of this license are posted there, you may use a
# newer version instead, at your option.
#
# This software consists of voluntary contributions made by many
# individuals. For exact contribution history, see the revision
# history and logs, available at http://cvs2svn.tigris.org/.
# ====================================================================
"""This module contains a database that can store arbitrary CVSItems."""
import re
import cPickle
from cvs2svn_lib.cvs_item import CVSRevisionAdd
from cvs2svn_lib.cvs_item import CVSRevisionChange
from cvs2svn_lib.cvs_item import CVSRevisionDelete
from cvs2svn_lib.cvs_item import CVSRevisionNoop
from cvs2svn_lib.cvs_item import CVSBranch
from cvs2svn_lib.cvs_item import CVSBranchNoop
from cvs2svn_lib.cvs_item import CVSTag
from cvs2svn_lib.cvs_item import CVSTagNoop
from cvs2svn_lib.cvs_file_items import CVSFileItems
from cvs2svn_lib.serializer import Serializer
from cvs2svn_lib.serializer import PrimedPickleSerializer
from cvs2svn_lib.indexed_database import IndexedStore
cvs_item_primer = (
CVSRevisionAdd, CVSRevisionChange,
CVSRevisionDelete, CVSRevisionNoop,
CVSBranch, CVSBranchNoop,
CVSTag, CVSTagNoop,
)
class NewCVSItemStore:
"""A file of sequential CVSItems, grouped by CVSFile.
The file consists of a sequence of pickles. The zeroth one is a
Serializer as described in the serializer module. Subsequent ones
are pickled lists of CVSItems, each list containing all of the
CVSItems for a single file.
We don't use a single pickler for all items because the memo would
grow too large."""
def __init__(self, filename):
"""Initialize an instance, creating the file and writing the primer."""
self.f = open(filename, 'wb')
self.serializer = PrimedPickleSerializer(
cvs_item_primer + (CVSFileItems,)
)
cPickle.dump(self.serializer, self.f, -1)
def add(self, cvs_file_items):
"""Write CVS_FILE_ITEMS into the database."""
self.serializer.dumpf(self.f, cvs_file_items)
def close(self):
self.f.close()
self.f = None
class OldCVSItemStore:
"""Read a file created by NewCVSItemStore.
The file must be read sequentially, one CVSFileItems instance at a
time."""
def __init__(self, filename):
self.f = open(filename, 'rb')
# Read the memo from the first pickle:
self.serializer = cPickle.load(self.f)
def iter_cvs_file_items(self):
"""Iterate through the CVSFileItems instances, one file at a time.
Each time yield a CVSFileItems instance for one CVSFile."""
try:
while True:
yield self.serializer.loadf(self.f)
except EOFError:
return
def close(self):
self.f.close()
self.f = None
class LinewiseSerializer(Serializer):
"""A serializer that writes exactly one line for each object.
The actual serialization is done by a wrapped serializer; this class
only escapes any newlines in the serialized data then appends a
single newline."""
def __init__(self, wrapee):
self.wrapee = wrapee
@staticmethod
def _encode_newlines(s):
"""Return s with newlines and backslashes encoded.
The string is returned with the following character transformations:
LF -> \n
CR -> \r
^Z -> \z (needed for Windows)
\ -> \\
"""
return s.replace('\\', '\\\\') \
.replace('\n', '\\n') \
.replace('\r', '\\r') \
.replace('\x1a', '\\z')
_escape_re = re.compile(r'(\\\\|\\n|\\r|\\z)')
_subst = {'\\n' : '\n', '\\r' : '\r', '\\z' : '\x1a', '\\\\' : '\\'}
@staticmethod
def _decode_newlines(s):
"""Return s with newlines and backslashes decoded.
This function reverses the encoding of _encode_newlines().
"""
def repl(m):
return LinewiseSerializer._subst[m.group(1)]
return LinewiseSerializer._escape_re.sub(repl, s)
def dumpf(self, f, object):
f.write(self.dumps(object))
def dumps(self, object):
return self._encode_newlines(self.wrapee.dumps(object)) + '\n'
def loadf(self, f):
return self.loads(f.readline())
def loads(self, s):
return self.wrapee.loads(self._decode_newlines(s[:-1]))
class NewSortableCVSRevisionDatabase(object):
"""A serially-accessible, sortable file for holding CVSRevisions.
This class creates such files."""
def __init__(self, filename, serializer):
self.f = open(filename, 'w')
self.serializer = LinewiseSerializer(serializer)
def add(self, cvs_rev):
self.f.write(
'%x %08x %s' % (
cvs_rev.metadata_id, cvs_rev.timestamp,
self.serializer.dumps(cvs_rev),
)
)
def close(self):
self.f.close()
self.f = None
class OldSortableCVSRevisionDatabase(object):
"""A serially-accessible, sortable file for holding CVSRevisions.
This class reads such files."""
def __init__(self, filename, serializer):
self.filename = filename
self.serializer = LinewiseSerializer(serializer)
def __iter__(self):
f = open(self.filename, 'r')
for l in f:
s = l.split(' ', 2)[-1]
yield self.serializer.loads(s)
f.close()
def close(self):
pass
class NewSortableCVSSymbolDatabase(object):
"""A serially-accessible, sortable file for holding CVSSymbols.
This class creates such files."""
def __init__(self, filename, serializer):
self.f = open(filename, 'w')
self.serializer = LinewiseSerializer(serializer)
def add(self, cvs_symbol):
self.f.write(
'%x %s' % (cvs_symbol.symbol.id, self.serializer.dumps(cvs_symbol))
)
def close(self):
self.f.close()
self.f = None
class OldSortableCVSSymbolDatabase(object):
"""A serially-accessible, sortable file for holding CVSSymbols.
This class reads such files."""
def __init__(self, filename, serializer):
self.filename = filename
self.serializer = LinewiseSerializer(serializer)
def __iter__(self):
f = open(self.filename, 'r')
for l in f:
s = l.split(' ', 1)[-1]
yield self.serializer.loads(s)
f.close()
def close(self):
pass
def IndexedCVSItemStore(filename, index_filename, mode):
return IndexedStore(
filename, index_filename, mode,
PrimedPickleSerializer(cvs_item_primer)
)
|