/usr/lib/python2.7/dist-packages/bzrlib/tag.py is in python-bzrlib 2.7.0-2ubuntu3.1.
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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 | # Copyright (C) 2007-2011 Canonical Ltd
#
# 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 2 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
"""Tag strategies.
These are contained within a branch and normally constructed
when the branch is opened. Clients should typically do
Branch.tags.add('name', 'value')
"""
from __future__ import absolute_import
# NOTE: I was going to call this tags.py, but vim seems to think all files
# called tags* are ctags files... mbp 20070220.
from bzrlib.registry import Registry
from bzrlib.lazy_import import lazy_import
lazy_import(globals(), """
import itertools
import re
import sys
from bzrlib import (
bencode,
cleanup,
errors,
symbol_versioning,
trace,
)
""")
class _Tags(object):
def __init__(self, branch):
self.branch = branch
def get_tag_dict(self):
"""Return a dictionary mapping tags to revision ids.
"""
raise NotImplementedError(self.get_tag_dict)
def get_reverse_tag_dict(self):
"""Return a dictionary mapping revision ids to list of tags.
"""
raise NotImplementedError(self.get_reverse_tag_dict)
def merge_to(self, to_tags, overwrite=False, ignore_master=False):
"""Merge new tags from this tags container into another.
:param to_tags: Tags container to merge into
:param overwrite: Whether to overwrite existing, divergent, tags.
:param ignore_master: Do not modify the tags in the target's master
branch (if any). Default is false (so the master will be updated).
New in bzr 2.3.
:return: Tuple with tag updates as dictionary and tag conflicts
"""
raise NotImplementedError(self.merge_to)
def set_tag(self, tag_name, revision):
"""Set a tag.
:param tag_name: Tag name
:param revision: Revision id
:raise GhostTagsNotSupported: if revision is not present in
the branch repository
"""
raise NotImplementedError(self.set_tag)
def lookup_tag(self, tag_name):
"""Look up a tag.
:param tag_name: Tag to look up
:raise NoSuchTag: Raised when tag does not exist
:return: Matching revision id
"""
raise NotImplementedError(self.lookup_tag)
def delete_tag(self, tag_name):
"""Delete a tag.
:param tag_name: Tag to delete
:raise NoSuchTag: Raised when tag does not exist
"""
raise NotImplementedError(self.delete_tag)
def rename_revisions(self, rename_map):
"""Replace revision ids according to a rename map.
:param rename_map: Dictionary mapping old revision ids to
new revision ids.
"""
raise NotImplementedError(self.rename_revisions)
def has_tag(self, tag_name):
return self.get_tag_dict().has_key(tag_name)
class DisabledTags(_Tags):
"""Tag storage that refuses to store anything.
This is used by older formats that can't store tags.
"""
def _not_supported(self, *a, **k):
raise errors.TagsNotSupported(self.branch)
set_tag = _not_supported
get_tag_dict = _not_supported
_set_tag_dict = _not_supported
lookup_tag = _not_supported
delete_tag = _not_supported
def merge_to(self, to_tags, overwrite=False, ignore_master=False):
# we never have anything to copy
return {}, []
def rename_revisions(self, rename_map):
# No tags, so nothing to rename
pass
def get_reverse_tag_dict(self):
# There aren't any tags, so the reverse mapping is empty.
return {}
class BasicTags(_Tags):
"""Tag storage in an unversioned branch control file.
"""
def set_tag(self, tag_name, tag_target):
"""Add a tag definition to the branch.
Behaviour if the tag is already present is not defined (yet).
"""
# all done with a write lock held, so this looks atomic
self.branch.lock_write()
try:
master = self.branch.get_master_branch()
if master is not None:
master.tags.set_tag(tag_name, tag_target)
td = self.get_tag_dict()
td[tag_name] = tag_target
self._set_tag_dict(td)
finally:
self.branch.unlock()
def lookup_tag(self, tag_name):
"""Return the referent string of a tag"""
td = self.get_tag_dict()
try:
return td[tag_name]
except KeyError:
raise errors.NoSuchTag(tag_name)
def get_tag_dict(self):
self.branch.lock_read()
try:
try:
tag_content = self.branch._get_tags_bytes()
except errors.NoSuchFile, e:
# ugly, but only abentley should see this :)
trace.warning('No branch/tags file in %s. '
'This branch was probably created by bzr 0.15pre. '
'Create an empty file to silence this message.'
% (self.branch, ))
return {}
return self._deserialize_tag_dict(tag_content)
finally:
self.branch.unlock()
def get_reverse_tag_dict(self):
"""Returns a dict with revisions as keys
and a list of tags for that revision as value"""
d = self.get_tag_dict()
rev = {}
for key in d:
try:
rev[d[key]].append(key)
except KeyError:
rev[d[key]] = [key]
return rev
def delete_tag(self, tag_name):
"""Delete a tag definition.
"""
self.branch.lock_write()
try:
d = self.get_tag_dict()
try:
del d[tag_name]
except KeyError:
raise errors.NoSuchTag(tag_name)
master = self.branch.get_master_branch()
if master is not None:
try:
master.tags.delete_tag(tag_name)
except errors.NoSuchTag:
pass
self._set_tag_dict(d)
finally:
self.branch.unlock()
def _set_tag_dict(self, new_dict):
"""Replace all tag definitions
WARNING: Calling this on an unlocked branch will lock it, and will
replace the tags without warning on conflicts.
:param new_dict: Dictionary from tag name to target.
"""
return self.branch._set_tags_bytes(self._serialize_tag_dict(new_dict))
def _serialize_tag_dict(self, tag_dict):
td = dict((k.encode('utf-8'), v)
for k,v in tag_dict.items())
return bencode.bencode(td)
def _deserialize_tag_dict(self, tag_content):
"""Convert the tag file into a dictionary of tags"""
# was a special case to make initialization easy, an empty definition
# is an empty dictionary
if tag_content == '':
return {}
try:
r = {}
for k, v in bencode.bdecode(tag_content).items():
r[k.decode('utf-8')] = v
return r
except ValueError, e:
raise ValueError("failed to deserialize tag dictionary %r: %s"
% (tag_content, e))
def merge_to(self, to_tags, overwrite=False, ignore_master=False):
"""Copy tags between repositories if necessary and possible.
This method has common command-line behaviour about handling
error cases.
All new definitions are copied across, except that tags that already
exist keep their existing definitions.
:param to_tags: Branch to receive these tags
:param overwrite: Overwrite conflicting tags in the target branch
:param ignore_master: Do not modify the tags in the target's master
branch (if any). Default is false (so the master will be updated).
New in bzr 2.3.
:returns: Tuple with tag_updates and tag_conflicts.
tag_updates is a dictionary with new tags, None is used for
removed tags
tag_conflicts is a set of tags that conflicted, each of which is
(tagname, source_target, dest_target), or None if no copying was
done.
"""
operation = cleanup.OperationWithCleanups(self._merge_to_operation)
return operation.run(to_tags, overwrite, ignore_master)
def _merge_to_operation(self, operation, to_tags, overwrite, ignore_master):
add_cleanup = operation.add_cleanup
if self.branch == to_tags.branch:
return {}, []
if not self.branch.supports_tags():
# obviously nothing to copy
return {}, []
source_dict = self.get_tag_dict()
if not source_dict:
# no tags in the source, and we don't want to clobber anything
# that's in the destination
return {}, []
# We merge_to both master and child individually.
#
# It's possible for master and child to have differing sets of
# tags, in which case it's possible to have different sets of
# conflicts. We report the union of both conflict sets. In
# that case it's likely the child and master have accepted
# different tags from the source, which may be a surprising result, but
# the best we can do in the circumstances.
#
# Ideally we'd improve this API to report the different conflicts
# more clearly to the caller, but we don't want to break plugins
# such as bzr-builddeb that use this API.
add_cleanup(to_tags.branch.lock_write().unlock)
if ignore_master:
master = None
else:
master = to_tags.branch.get_master_branch()
if master is not None:
add_cleanup(master.lock_write().unlock)
updates, conflicts = self._merge_to(to_tags, source_dict, overwrite)
if master is not None:
extra_updates, extra_conflicts = self._merge_to(master.tags,
source_dict, overwrite)
updates.update(extra_updates)
conflicts += extra_conflicts
# We use set() to remove any duplicate conflicts from the master
# branch.
return updates, set(conflicts)
def _merge_to(self, to_tags, source_dict, overwrite):
dest_dict = to_tags.get_tag_dict()
result, updates, conflicts = self._reconcile_tags(source_dict,
dest_dict, overwrite)
if result != dest_dict:
to_tags._set_tag_dict(result)
return updates, conflicts
def rename_revisions(self, rename_map):
"""Rename revisions in this tags dictionary.
:param rename_map: Dictionary mapping old revids to new revids
"""
reverse_tags = self.get_reverse_tag_dict()
for revid, names in reverse_tags.iteritems():
if revid in rename_map:
for name in names:
self.set_tag(name, rename_map[revid])
def _reconcile_tags(self, source_dict, dest_dict, overwrite):
"""Do a two-way merge of two tag dictionaries.
* only in source => source value
* only in destination => destination value
* same definitions => that
* different definitions => if overwrite is False, keep destination
value and give a warning, otherwise use the source value
:returns: (result_dict, updates,
[(conflicting_tag, source_target, dest_target)])
"""
conflicts = []
updates = {}
result = dict(dest_dict) # copy
for name, target in source_dict.items():
if result.get(name) == target:
pass
elif name not in result or overwrite:
updates[name] = target
result[name] = target
else:
conflicts.append((name, target, result[name]))
return result, updates, conflicts
def _merge_tags_if_possible(from_branch, to_branch, ignore_master=False):
# Try hard to support merge_to implementations that don't expect
# 'ignore_master' (new in bzr 2.3). First, if the flag isn't set then we
# can safely avoid passing ignore_master at all.
if not ignore_master:
from_branch.tags.merge_to(to_branch.tags)
return
# If the flag is set, try to pass it, but be ready to catch TypeError.
try:
from_branch.tags.merge_to(to_branch.tags, ignore_master=ignore_master)
except TypeError:
# Probably this implementation of 'merge_to' is from a plugin that
# doesn't expect the 'ignore_master' keyword argument (e.g. bzr-svn
# 1.0.4). There's a small risk that the TypeError is actually caused
# by a completely different problem (which is why we don't catch it for
# the ignore_master=False case), but even then there's probably no harm
# in calling a second time.
symbol_versioning.warn(
symbol_versioning.deprecated_in((2,3)) % (
"Tags.merge_to (of %r) that doesn't accept ignore_master kwarg"
% (from_branch.tags,),),
DeprecationWarning)
from_branch.tags.merge_to(to_branch.tags)
def sort_natural(branch, tags):
"""Sort tags, with numeric substrings as numbers.
:param branch: Branch
:param tags: List of tuples with tag name and revision id.
"""
def natural_sort_key(tag):
return [f(s) for f,s in
zip(itertools.cycle((unicode.lower,int)),
re.split('([0-9]+)', tag[0]))]
tags.sort(key=natural_sort_key)
def sort_alpha(branch, tags):
"""Sort tags lexicographically, in place.
:param branch: Branch
:param tags: List of tuples with tag name and revision id.
"""
tags.sort()
def sort_time(branch, tags):
"""Sort tags by time inline.
:param branch: Branch
:param tags: List of tuples with tag name and revision id.
"""
timestamps = {}
for tag, revid in tags:
try:
revobj = branch.repository.get_revision(revid)
except errors.NoSuchRevision:
timestamp = sys.maxint # place them at the end
else:
timestamp = revobj.timestamp
timestamps[revid] = timestamp
tags.sort(key=lambda x: timestamps[x[1]])
tag_sort_methods = Registry()
tag_sort_methods.register("natural", sort_natural,
'Sort numeric substrings as numbers. (default)')
tag_sort_methods.register("alpha", sort_alpha, 'Sort tags lexicographically.')
tag_sort_methods.register("time", sort_time, 'Sort tags chronologically.')
tag_sort_methods.default_key = "natural"
|