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- Committer: mbp at sourcefrog
- Date: 2005-03-09 04:08:15 UTC
- Revision ID: mbp@sourcefrog.net-20050309040815-13242001617e4a06
import from baz patch-364
- files added:
- bzrlib/tests.py
- files removed:
- .bzrignore
- bzrlib/export
- bzrlib/plugins
- bzrlib/store
- bzrlib/tests
- bzrlib/tests/blackbox
- bzrlib/transport
- bzrlib/ui
- bzrlib/util
- bzrlib/util/configobj
- bzrlib/util/configobj/docs
- bzrlib/util/effbot
- bzrlib/util/effbot/org
- bzrlib/util/elementtree
- bzrlib/util/urlgrabber
- contrib
- contrib/bash
- contrib/emacs
- contrib/zsh
- doc
- notes
- patches
- tools
- files renamed:
- bzrlib/commands.py => bzr.py
- bzrlib/store/__init__.py => bzrlib/store.py
- files modified:
- README
added
removed
bzrlib/changeset.py
1
# Copyright (C) 2004 Aaron Bentley <aaron.bentley@utoronto.ca>
2
#
3
# This program is free software; you can redistribute it and/or modify
4
# it under the terms of the GNU General Public License as published by
5
# the Free Software Foundation; either version 2 of the License, or
6
# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
9
# but WITHOUT ANY WARRANTY; without even the implied warranty of
10
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11
# GNU General Public License for more details.
12
#
13
# You should have received a copy of the GNU General Public License
14
# along with this program; if not, write to the Free Software
15
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
16
17
"""Represent and apply a changeset.
18
19
Conflicts in applying a changeset are represented as exceptions.
20
21
This only handles the in-memory objects representing changesets, which are
22
primarily used by the merge code.
23
"""
24
25
import os.path
26
import errno
27
import stat
28
from tempfile import mkdtemp
29
from shutil import rmtree
30
from itertools import izip
31
32
from bzrlib.trace import mutter, warning
33
from bzrlib.osutils import rename, sha_file
34
import bzrlib
35
from bzrlib.errors import BzrCheckError
36
37
__docformat__ = "restructuredtext"
38
39
NULL_ID = "!NULL"
40
41
class OldFailedTreeOp(Exception):
42
def __init__(self):
43
Exception.__init__(self, "bzr-tree-change contains files from a"
44
" previous failed merge operation.")
45
def invert_dict(dict):
46
newdict = {}
47
for (key,value) in dict.iteritems():
48
newdict[value] = key
49
return newdict
50
51
52
class ChangeExecFlag(object):
53
"""This is two-way change, suitable for file modification, creation,
54
deletion"""
55
def __init__(self, old_exec_flag, new_exec_flag):
56
self.old_exec_flag = old_exec_flag
57
self.new_exec_flag = new_exec_flag
58
59
def apply(self, filename, conflict_handler, reverse=False):
60
if not reverse:
61
from_exec_flag = self.old_exec_flag
62
to_exec_flag = self.new_exec_flag
63
else:
64
from_exec_flag = self.new_exec_flag
65
to_exec_flag = self.old_exec_flag
66
try:
67
current_exec_flag = bool(os.stat(filename).st_mode & 0111)
68
except OSError, e:
69
if e.errno == errno.ENOENT:
70
if conflict_handler.missing_for_exec_flag(filename) == "skip":
71
return
72
else:
73
current_exec_flag = from_exec_flag
74
75
if from_exec_flag is not None and current_exec_flag != from_exec_flag:
76
if conflict_handler.wrong_old_exec_flag(filename,
77
from_exec_flag, current_exec_flag) != "continue":
78
return
79
80
if to_exec_flag is not None:
81
current_mode = os.stat(filename).st_mode
82
if to_exec_flag:
83
umask = os.umask(0)
84
os.umask(umask)
85
to_mode = current_mode | (0100 & ~umask)
86
# Enable x-bit for others only if they can read it.
87
if current_mode & 0004:
88
to_mode |= 0001 & ~umask
89
if current_mode & 0040:
90
to_mode |= 0010 & ~umask
91
else:
92
to_mode = current_mode & ~0111
93
try:
94
os.chmod(filename, to_mode)
95
except IOError, e:
96
if e.errno == errno.ENOENT:
97
conflict_handler.missing_for_exec_flag(filename)
98
99
def __eq__(self, other):
100
return (isinstance(other, ChangeExecFlag) and
101
self.old_exec_flag == other.old_exec_flag and
102
self.new_exec_flag == other.new_exec_flag)
103
104
def __ne__(self, other):
105
return not (self == other)
106
107
108
def dir_create(filename, conflict_handler, reverse):
109
"""Creates the directory, or deletes it if reverse is true. Intended to be
110
used with ReplaceContents.
111
112
:param filename: The name of the directory to create
113
:type filename: str
114
:param reverse: If true, delete the directory, instead
115
:type reverse: bool
116
"""
117
if not reverse:
118
try:
119
os.mkdir(filename)
120
except OSError, e:
121
if e.errno != errno.EEXIST:
122
raise
123
if conflict_handler.dir_exists(filename) == "continue":
124
os.mkdir(filename)
125
except IOError, e:
126
if e.errno == errno.ENOENT:
127
if conflict_handler.missing_parent(filename)=="continue":
128
file(filename, "wb").write(self.contents)
129
else:
130
try:
131
os.rmdir(filename)
132
except OSError, e:
133
if e.errno != errno.ENOTEMPTY:
134
raise
135
if conflict_handler.rmdir_non_empty(filename) == "skip":
136
return
137
os.rmdir(filename)
138
139
140
class SymlinkCreate(object):
141
"""Creates or deletes a symlink (for use with ReplaceContents)"""
142
def __init__(self, contents):
143
"""Constructor.
144
145
:param contents: The filename of the target the symlink should point to
146
:type contents: str
147
"""
148
self.target = contents
149
150
def __repr__(self):
151
return "SymlinkCreate(%s)" % self.target
152
153
def __call__(self, filename, conflict_handler, reverse):
154
"""Creates or destroys the symlink.
155
156
:param filename: The name of the symlink to create
157
:type filename: str
158
"""
159
if reverse:
160
assert(os.readlink(filename) == self.target)
161
os.unlink(filename)
162
else:
163
try:
164
os.symlink(self.target, filename)
165
except OSError, e:
166
if e.errno != errno.EEXIST:
167
raise
168
if conflict_handler.link_name_exists(filename) == "continue":
169
os.symlink(self.target, filename)
170
171
def __eq__(self, other):
172
if not isinstance(other, SymlinkCreate):
173
return False
174
elif self.target != other.target:
175
return False
176
else:
177
return True
178
179
def __ne__(self, other):
180
return not (self == other)
181
182
class FileCreate(object):
183
"""Create or delete a file (for use with ReplaceContents)"""
184
def __init__(self, contents):
185
"""Constructor
186
187
:param contents: The contents of the file to write
188
:type contents: str
189
"""
190
self.contents = contents
191
192
def __repr__(self):
193
return "FileCreate(%i b)" % len(self.contents)
194
195
def __eq__(self, other):
196
if not isinstance(other, FileCreate):
197
return False
198
elif self.contents != other.contents:
199
return False
200
else:
201
return True
202
203
def __ne__(self, other):
204
return not (self == other)
205
206
def __call__(self, filename, conflict_handler, reverse):
207
"""Create or delete a file
208
209
:param filename: The name of the file to create
210
:type filename: str
211
:param reverse: Delete the file instead of creating it
212
:type reverse: bool
213
"""
214
if not reverse:
215
try:
216
file(filename, "wb").write(self.contents)
217
except IOError, e:
218
if e.errno == errno.ENOENT:
219
if conflict_handler.missing_parent(filename)=="continue":
220
file(filename, "wb").write(self.contents)
221
else:
222
raise
223
224
else:
225
try:
226
if (file(filename, "rb").read() != self.contents):
227
direction = conflict_handler.wrong_old_contents(filename,
228
self.contents)
229
if direction != "continue":
230
return
231
os.unlink(filename)
232
except IOError, e:
233
if e.errno != errno.ENOENT:
234
raise
235
if conflict_handler.missing_for_rm(filename, undo) == "skip":
236
return
237
238
239
240
class TreeFileCreate(object):
241
"""Create or delete a file (for use with ReplaceContents)"""
242
def __init__(self, tree, file_id):
243
"""Constructor
244
245
:param contents: The contents of the file to write
246
:type contents: str
247
"""
248
self.tree = tree
249
self.file_id = file_id
250
251
def __repr__(self):
252
return "TreeFileCreate(%s)" % self.file_id
253
254
def __eq__(self, other):
255
if not isinstance(other, TreeFileCreate):
256
return False
257
return self.tree.get_file_sha1(self.file_id) == \
258
other.tree.get_file_sha1(other.file_id)
259
260
def __ne__(self, other):
261
return not (self == other)
262
263
def write_file(self, filename):
264
outfile = file(filename, "wb")
265
for line in self.tree.get_file(self.file_id):
266
outfile.write(line)
267
268
def same_text(self, filename):
269
in_file = file(filename, "rb")
270
return sha_file(in_file) == self.tree.get_file_sha1(self.file_id)
271
272
def __call__(self, filename, conflict_handler, reverse):
273
"""Create or delete a file
274
275
:param filename: The name of the file to create
276
:type filename: str
277
:param reverse: Delete the file instead of creating it
278
:type reverse: bool
279
"""
280
if not reverse:
281
try:
282
self.write_file(filename)
283
except IOError, e:
284
if e.errno == errno.ENOENT:
285
if conflict_handler.missing_parent(filename)=="continue":
286
self.write_file(filename)
287
else:
288
raise
289
290
else:
291
try:
292
if not self.same_text(filename):
293
direction = conflict_handler.wrong_old_contents(filename,
294
self.tree.get_file(self.file_id).read())
295
if direction != "continue":
296
return
297
os.unlink(filename)
298
except IOError, e:
299
if e.errno != errno.ENOENT:
300
raise
301
if conflict_handler.missing_for_rm(filename, undo) == "skip":
302
return
303
304
305
306
def reversed(sequence):
307
max = len(sequence) - 1
308
for i in range(len(sequence)):
309
yield sequence[max - i]
310
311
class ReplaceContents(object):
312
"""A contents-replacement framework. It allows a file/directory/symlink to
313
be created, deleted, or replaced with another file/directory/symlink.
314
Arguments must be callable with (filename, reverse).
315
"""
316
def __init__(self, old_contents, new_contents):
317
"""Constructor.
318
319
:param old_contents: The change to reverse apply (e.g. a deletion), \
320
when going forwards.
321
:type old_contents: `dir_create`, `SymlinkCreate`, `FileCreate`, \
322
NoneType, etc.
323
:param new_contents: The second change to apply (e.g. a creation), \
324
when going forwards.
325
:type new_contents: `dir_create`, `SymlinkCreate`, `FileCreate`, \
326
NoneType, etc.
327
"""
328
self.old_contents=old_contents
329
self.new_contents=new_contents
330
331
def __repr__(self):
332
return "ReplaceContents(%r -> %r)" % (self.old_contents,
333
self.new_contents)
334
335
def __eq__(self, other):
336
if not isinstance(other, ReplaceContents):
337
return False
338
elif self.old_contents != other.old_contents:
339
return False
340
elif self.new_contents != other.new_contents:
341
return False
342
else:
343
return True
344
def __ne__(self, other):
345
return not (self == other)
346
347
def apply(self, filename, conflict_handler, reverse=False):
348
"""Applies the FileReplacement to the specified filename
349
350
:param filename: The name of the file to apply changes to
351
:type filename: str
352
:param reverse: If true, apply the change in reverse
353
:type reverse: bool
354
"""
355
if not reverse:
356
undo = self.old_contents
357
perform = self.new_contents
358
else:
359
undo = self.new_contents
360
perform = self.old_contents
361
mode = None
362
if undo is not None:
363
try:
364
mode = os.lstat(filename).st_mode
365
if stat.S_ISLNK(mode):
366
mode = None
367
except OSError, e:
368
if e.errno != errno.ENOENT:
369
raise
370
if conflict_handler.missing_for_rm(filename, undo) == "skip":
371
return
372
undo(filename, conflict_handler, reverse=True)
373
if perform is not None:
374
perform(filename, conflict_handler, reverse=False)
375
if mode is not None:
376
os.chmod(filename, mode)
377
378
def is_creation(self):
379
return self.new_contents is not None and self.old_contents is None
380
381
def is_deletion(self):
382
return self.old_contents is not None and self.new_contents is None
383
384
class ApplySequence(object):
385
def __init__(self, changes=None):
386
self.changes = []
387
if changes is not None:
388
self.changes.extend(changes)
389
390
def __eq__(self, other):
391
if not isinstance(other, ApplySequence):
392
return False
393
elif len(other.changes) != len(self.changes):
394
return False
395
else:
396
for i in range(len(self.changes)):
397
if self.changes[i] != other.changes[i]:
398
return False
399
return True
400
401
def __ne__(self, other):
402
return not (self == other)
403
404
405
def apply(self, filename, conflict_handler, reverse=False):
406
if not reverse:
407
iter = self.changes
408
else:
409
iter = reversed(self.changes)
410
for change in iter:
411
change.apply(filename, conflict_handler, reverse)
412
413
414
class Diff3Merge(object):
415
history_based = False
416
def __init__(self, file_id, base, other):
417
self.file_id = file_id
418
self.base = base
419
self.other = other
420
421
def is_creation(self):
422
return False
423
424
def is_deletion(self):
425
return False
426
427
def __eq__(self, other):
428
if not isinstance(other, Diff3Merge):
429
return False
430
return (self.base == other.base and
431
self.other == other.other and self.file_id == other.file_id)
432
433
def __ne__(self, other):
434
return not (self == other)
435
436
def dump_file(self, temp_dir, name, tree):
437
out_path = os.path.join(temp_dir, name)
438
out_file = file(out_path, "wb")
439
in_file = tree.get_file(self.file_id)
440
for line in in_file:
441
out_file.write(line)
442
return out_path
443
444
def apply(self, filename, conflict_handler, reverse=False):
445
import bzrlib.patch
446
temp_dir = mkdtemp(prefix="bzr-")
447
try:
448
new_file = filename+".new"
449
base_file = self.dump_file(temp_dir, "base", self.base)
450
other_file = self.dump_file(temp_dir, "other", self.other)
451
if not reverse:
452
base = base_file
453
other = other_file
454
else:
455
base = other_file
456
other = base_file
457
status = bzrlib.patch.diff3(new_file, filename, base, other)
458
if status == 0:
459
os.chmod(new_file, os.stat(filename).st_mode)
460
rename(new_file, filename)
461
return
462
else:
463
assert(status == 1)
464
def get_lines(filename):
465
my_file = file(filename, "rb")
466
lines = my_file.readlines()
467
my_file.close()
468
return lines
469
base_lines = get_lines(base)
470
other_lines = get_lines(other)
471
conflict_handler.merge_conflict(new_file, filename, base_lines,
472
other_lines)
473
finally:
474
rmtree(temp_dir)
475
476
477
def CreateDir():
478
"""Convenience function to create a directory.
479
480
:return: A ReplaceContents that will create a directory
481
:rtype: `ReplaceContents`
482
"""
483
return ReplaceContents(None, dir_create)
484
485
def DeleteDir():
486
"""Convenience function to delete a directory.
487
488
:return: A ReplaceContents that will delete a directory
489
:rtype: `ReplaceContents`
490
"""
491
return ReplaceContents(dir_create, None)
492
493
def CreateFile(contents):
494
"""Convenience fucntion to create a file.
495
496
:param contents: The contents of the file to create
497
:type contents: str
498
:return: A ReplaceContents that will create a file
499
:rtype: `ReplaceContents`
500
"""
501
return ReplaceContents(None, FileCreate(contents))
502
503
def DeleteFile(contents):
504
"""Convenience fucntion to delete a file.
505
506
:param contents: The contents of the file to delete
507
:type contents: str
508
:return: A ReplaceContents that will delete a file
509
:rtype: `ReplaceContents`
510
"""
511
return ReplaceContents(FileCreate(contents), None)
512
513
def ReplaceFileContents(old_tree, new_tree, file_id):
514
"""Convenience fucntion to replace the contents of a file.
515
516
:param old_contents: The contents of the file to replace
517
:type old_contents: str
518
:param new_contents: The contents to replace the file with
519
:type new_contents: str
520
:return: A ReplaceContents that will replace the contents of a file a file
521
:rtype: `ReplaceContents`
522
"""
523
return ReplaceContents(TreeFileCreate(old_tree, file_id),
524
TreeFileCreate(new_tree, file_id))
525
526
def CreateSymlink(target):
527
"""Convenience fucntion to create a symlink.
528
529
:param target: The path the link should point to
530
:type target: str
531
:return: A ReplaceContents that will delete a file
532
:rtype: `ReplaceContents`
533
"""
534
return ReplaceContents(None, SymlinkCreate(target))
535
536
def DeleteSymlink(target):
537
"""Convenience fucntion to delete a symlink.
538
539
:param target: The path the link should point to
540
:type target: str
541
:return: A ReplaceContents that will delete a file
542
:rtype: `ReplaceContents`
543
"""
544
return ReplaceContents(SymlinkCreate(target), None)
545
546
def ChangeTarget(old_target, new_target):
547
"""Convenience fucntion to change the target of a symlink.
548
549
:param old_target: The current link target
550
:type old_target: str
551
:param new_target: The new link target to use
552
:type new_target: str
553
:return: A ReplaceContents that will delete a file
554
:rtype: `ReplaceContents`
555
"""
556
return ReplaceContents(SymlinkCreate(old_target), SymlinkCreate(new_target))
557
558
559
class InvalidEntry(Exception):
560
"""Raise when a ChangesetEntry is invalid in some way"""
561
def __init__(self, entry, problem):
562
"""Constructor.
563
564
:param entry: The invalid ChangesetEntry
565
:type entry: `ChangesetEntry`
566
:param problem: The problem with the entry
567
:type problem: str
568
"""
569
msg = "Changeset entry for %s (%s) is invalid.\n%s" % (entry.id,
570
entry.path,
571
problem)
572
Exception.__init__(self, msg)
573
self.entry = entry
574
575
576
class SourceRootHasName(InvalidEntry):
577
"""This changeset entry has a name other than "", but its parent is !NULL"""
578
def __init__(self, entry, name):
579
"""Constructor.
580
581
:param entry: The invalid ChangesetEntry
582
:type entry: `ChangesetEntry`
583
:param name: The name of the entry
584
:type name: str
585
"""
586
msg = 'Child of !NULL is named "%s", not "./.".' % name
587
InvalidEntry.__init__(self, entry, msg)
588
589
class NullIDAssigned(InvalidEntry):
590
"""The id !NULL was assigned to a real entry"""
591
def __init__(self, entry):
592
"""Constructor.
593
594
:param entry: The invalid ChangesetEntry
595
:type entry: `ChangesetEntry`
596
"""
597
msg = '"!NULL" id assigned to a file "%s".' % entry.path
598
InvalidEntry.__init__(self, entry, msg)
599
600
class ParentIDIsSelf(InvalidEntry):
601
"""An entry is marked as its own parent"""
602
def __init__(self, entry):
603
"""Constructor.
604
605
:param entry: The invalid ChangesetEntry
606
:type entry: `ChangesetEntry`
607
"""
608
msg = 'file %s has "%s" id for both self id and parent id.' % \
609
(entry.path, entry.id)
610
InvalidEntry.__init__(self, entry, msg)
611
612
class ChangesetEntry(object):
613
"""An entry the changeset"""
614
def __init__(self, id, parent, path):
615
"""Constructor. Sets parent and name assuming it was not
616
renamed/created/deleted.
617
:param id: The id associated with the entry
618
:param parent: The id of the parent of this entry (or !NULL if no
619
parent)
620
:param path: The file path relative to the tree root of this entry
621
"""
622
self.id = id
623
self.path = path
624
self.new_path = path
625
self.parent = parent
626
self.new_parent = parent
627
self.contents_change = None
628
self.metadata_change = None
629
if parent == NULL_ID and path !='./.':
630
raise SourceRootHasName(self, path)
631
if self.id == NULL_ID:
632
raise NullIDAssigned(self)
633
if self.id == self.parent:
634
raise ParentIDIsSelf(self)
635
636
def __repr__(self):
637
return "ChangesetEntry(%s)" % self.id
638
639
__str__ = __repr__
640
641
def __get_dir(self):
642
if self.path is None:
643
return None
644
return os.path.dirname(self.path)
645
646
def __set_dir(self, dir):
647
self.path = os.path.join(dir, os.path.basename(self.path))
648
649
dir = property(__get_dir, __set_dir)
650
651
def __get_name(self):
652
if self.path is None:
653
return None
654
return os.path.basename(self.path)
655
656
def __set_name(self, name):
657
self.path = os.path.join(os.path.dirname(self.path), name)
658
659
name = property(__get_name, __set_name)
660
661
def __get_new_dir(self):
662
if self.new_path is None:
663
return None
664
return os.path.dirname(self.new_path)
665
666
def __set_new_dir(self, dir):
667
self.new_path = os.path.join(dir, os.path.basename(self.new_path))
668
669
new_dir = property(__get_new_dir, __set_new_dir)
670
671
def __get_new_name(self):
672
if self.new_path is None:
673
return None
674
return os.path.basename(self.new_path)
675
676
def __set_new_name(self, name):
677
self.new_path = os.path.join(os.path.dirname(self.new_path), name)
678
679
new_name = property(__get_new_name, __set_new_name)
680
681
def needs_rename(self):
682
"""Determines whether the entry requires renaming.
683
684
:rtype: bool
685
"""
686
687
return (self.parent != self.new_parent or self.name != self.new_name)
688
689
def is_deletion(self, reverse):
690
"""Return true if applying the entry would delete a file/directory.
691
692
:param reverse: if true, the changeset is being applied in reverse
693
:rtype: bool
694
"""
695
return self.is_creation(not reverse)
696
697
def is_creation(self, reverse):
698
"""Return true if applying the entry would create a file/directory.
699
700
:param reverse: if true, the changeset is being applied in reverse
701
:rtype: bool
702
"""
703
if self.contents_change is None:
704
return False
705
if reverse:
706
return self.contents_change.is_deletion()
707
else:
708
return self.contents_change.is_creation()
709
710
def is_creation_or_deletion(self):
711
"""Return true if applying the entry would create or delete a
712
file/directory.
713
714
:rtype: bool
715
"""
716
return self.is_creation(False) or self.is_deletion(False)
717
718
def get_cset_path(self, mod=False):
719
"""Determine the path of the entry according to the changeset.
720
721
:param changeset: The changeset to derive the path from
722
:type changeset: `Changeset`
723
:param mod: If true, generate the MOD path. Otherwise, generate the \
724
ORIG path.
725
:return: the path of the entry, or None if it did not exist in the \
726
requested tree.
727
:rtype: str or NoneType
728
"""
729
if mod:
730
if self.new_parent == NULL_ID:
731
return "./."
732
elif self.new_parent is None:
733
return None
734
return self.new_path
735
else:
736
if self.parent == NULL_ID:
737
return "./."
738
elif self.parent is None:
739
return None
740
return self.path
741
742
def summarize_name(self, reverse=False):
743
"""Produce a one-line summary of the filename. Indicates renames as
744
old => new, indicates creation as None => new, indicates deletion as
745
old => None.
746
747
:param changeset: The changeset to get paths from
748
:type changeset: `Changeset`
749
:param reverse: If true, reverse the names in the output
750
:type reverse: bool
751
:rtype: str
752
"""
753
orig_path = self.get_cset_path(False)
754
mod_path = self.get_cset_path(True)
755
if orig_path and orig_path.startswith('./'):
756
orig_path = orig_path[2:]
757
if mod_path and mod_path.startswith('./'):
758
mod_path = mod_path[2:]
759
if orig_path == mod_path:
760
return orig_path
761
else:
762
if not reverse:
763
return "%s => %s" % (orig_path, mod_path)
764
else:
765
return "%s => %s" % (mod_path, orig_path)
766
767
768
def get_new_path(self, id_map, changeset, reverse=False):
769
"""Determine the full pathname to rename to
770
771
:param id_map: The map of ids to filenames for the tree
772
:type id_map: Dictionary
773
:param changeset: The changeset to get data from
774
:type changeset: `Changeset`
775
:param reverse: If true, we're applying the changeset in reverse
776
:type reverse: bool
777
:rtype: str
778
"""
779
mutter("Finding new path for %s", self.summarize_name())
780
if reverse:
781
parent = self.parent
782
to_dir = self.dir
783
from_dir = self.new_dir
784
to_name = self.name
785
from_name = self.new_name
786
else:
787
parent = self.new_parent
788
to_dir = self.new_dir
789
from_dir = self.dir
790
to_name = self.new_name
791
from_name = self.name
792
793
if to_name is None:
794
return None
795
796
if parent == NULL_ID or parent is None:
797
if to_name != u'.':
798
raise SourceRootHasName(self, to_name)
799
else:
800
return u'.'
801
parent_entry = changeset.entries.get(parent)
802
if parent_entry is None:
803
dir = os.path.dirname(id_map[self.id])
804
else:
805
mutter("path, new_path: %r %r", self.path, self.new_path)
806
dir = parent_entry.get_new_path(id_map, changeset, reverse)
807
if from_name == to_name:
808
name = os.path.basename(id_map[self.id])
809
else:
810
name = to_name
811
assert(from_name is None or from_name == os.path.basename(id_map[self.id]))
812
return os.path.join(dir, name)
813
814
def is_boring(self):
815
"""Determines whether the entry does nothing
816
817
:return: True if the entry does no renames or content changes
818
:rtype: bool
819
"""
820
if self.contents_change is not None:
821
return False
822
elif self.metadata_change is not None:
823
return False
824
elif self.parent != self.new_parent:
825
return False
826
elif self.name != self.new_name:
827
return False
828
else:
829
return True
830
831
def apply(self, filename, conflict_handler, reverse=False):
832
"""Applies the file content and/or metadata changes.
833
834
:param filename: the filename of the entry
835
:type filename: str
836
:param reverse: If true, apply the changes in reverse
837
:type reverse: bool
838
"""
839
if self.is_deletion(reverse) and self.metadata_change is not None:
840
self.metadata_change.apply(filename, conflict_handler, reverse)
841
if self.contents_change is not None:
842
self.contents_change.apply(filename, conflict_handler, reverse)
843
if not self.is_deletion(reverse) and self.metadata_change is not None:
844
self.metadata_change.apply(filename, conflict_handler, reverse)
845
846
class IDPresent(Exception):
847
def __init__(self, id):
848
msg = "Cannot add entry because that id has already been used:\n%s" %\
849
id
850
Exception.__init__(self, msg)
851
self.id = id
852
853
class Changeset(object):
854
"""A set of changes to apply"""
855
def __init__(self):
856
self.entries = {}
857
858
def add_entry(self, entry):
859
"""Add an entry to the list of entries"""
860
if self.entries.has_key(entry.id):
861
raise IDPresent(entry.id)
862
self.entries[entry.id] = entry
863
864
def my_sort(sequence, key, reverse=False):
865
"""A sort function that supports supplying a key for comparison
866
867
:param sequence: The sequence to sort
868
:param key: A callable object that returns the values to be compared
869
:param reverse: If true, sort in reverse order
870
:type reverse: bool
871
"""
872
def cmp_by_key(entry_a, entry_b):
873
if reverse:
874
tmp=entry_a
875
entry_a = entry_b
876
entry_b = tmp
877
return cmp(key(entry_a), key(entry_b))
878
sequence.sort(cmp_by_key)
879
880
def get_rename_entries(changeset, inventory, reverse):
881
"""Return a list of entries that will be renamed. Entries are sorted from
882
longest to shortest source path and from shortest to longest target path.
883
884
:param changeset: The changeset to look in
885
:type changeset: `Changeset`
886
:param inventory: The source of current tree paths for the given ids
887
:type inventory: Dictionary
888
:param reverse: If true, the changeset is being applied in reverse
889
:type reverse: bool
890
:return: source entries and target entries as a tuple
891
:rtype: (List, List)
892
"""
893
source_entries = [x for x in changeset.entries.itervalues()
894
if x.needs_rename() or x.is_creation_or_deletion()]
895
# these are done from longest path to shortest, to avoid deleting a
896
# parent before its children are deleted/renamed
897
def longest_to_shortest(entry):
898
path = inventory.get(entry.id)
899
if path is None:
900
return 0
901
else:
902
return len(path)
903
my_sort(source_entries, longest_to_shortest, reverse=True)
904
905
target_entries = source_entries[:]
906
# These are done from shortest to longest path, to avoid creating a
907
# child before its parent has been created/renamed
908
def shortest_to_longest(entry):
909
path = entry.get_new_path(inventory, changeset, reverse)
910
if path is None:
911
return 0
912
else:
913
return len(path)
914
my_sort(target_entries, shortest_to_longest)
915
return (source_entries, target_entries)
916
917
def rename_to_temp_delete(source_entries, inventory, dir, temp_dir,
918
conflict_handler, reverse):
919
"""Delete and rename entries as appropriate. Entries are renamed to temp
920
names. A map of id -> temp name (or None, for deletions) is returned.
921
922
:param source_entries: The entries to rename and delete
923
:type source_entries: List of `ChangesetEntry`
924
:param inventory: The map of id -> filename in the current tree
925
:type inventory: Dictionary
926
:param dir: The directory to apply changes to
927
:type dir: str
928
:param reverse: Apply changes in reverse
929
:type reverse: bool
930
:return: a mapping of id to temporary name
931
:rtype: Dictionary
932
"""
933
temp_name = {}
934
for i in range(len(source_entries)):
935
entry = source_entries[i]
936
if entry.is_deletion(reverse):
937
path = os.path.join(dir, inventory[entry.id])
938
entry.apply(path, conflict_handler, reverse)
939
temp_name[entry.id] = None
940
941
elif entry.needs_rename():
942
if entry.is_creation(reverse):
943
continue
944
to_name = os.path.join(temp_dir, str(i))
945
src_path = inventory.get(entry.id)
946
if src_path is not None:
947
src_path = os.path.join(dir, src_path)
948
try:
949
rename(src_path, to_name)
950
temp_name[entry.id] = to_name
951
except OSError, e:
952
if e.errno != errno.ENOENT:
953
raise
954
if conflict_handler.missing_for_rename(src_path, to_name) \
955
== "skip":
956
continue
957
958
return temp_name
959
960
961
def rename_to_new_create(changed_inventory, target_entries, inventory,
962
changeset, dir, conflict_handler, reverse):
963
"""Rename entries with temp names to their final names, create new files.
964
965
:param changed_inventory: A mapping of id to temporary name
966
:type changed_inventory: Dictionary
967
:param target_entries: The entries to apply changes to
968
:type target_entries: List of `ChangesetEntry`
969
:param changeset: The changeset to apply
970
:type changeset: `Changeset`
971
:param dir: The directory to apply changes to
972
:type dir: str
973
:param reverse: If true, apply changes in reverse
974
:type reverse: bool
975
"""
976
for entry in target_entries:
977
new_tree_path = entry.get_new_path(inventory, changeset, reverse)
978
if new_tree_path is None:
979
continue
980
new_path = os.path.join(dir, new_tree_path)
981
old_path = changed_inventory.get(entry.id)
982
if bzrlib.osutils.lexists(new_path):
983
if conflict_handler.target_exists(entry, new_path, old_path) == \
984
"skip":
985
continue
986
if entry.is_creation(reverse):
987
entry.apply(new_path, conflict_handler, reverse)
988
changed_inventory[entry.id] = new_tree_path
989
elif entry.needs_rename():
990
if entry.is_deletion(reverse):
991
continue
992
if old_path is None:
993
continue
994
try:
995
mutter('rename %s to final name %s', old_path, new_path)
996
rename(old_path, new_path)
997
changed_inventory[entry.id] = new_tree_path
998
except OSError, e:
999
raise BzrCheckError('failed to rename %s to %s for changeset entry %s: %s'
1000
% (old_path, new_path, entry, e))
1001
1002
class TargetExists(Exception):
1003
def __init__(self, entry, target):
1004
msg = "The path %s already exists" % target
1005
Exception.__init__(self, msg)
1006
self.entry = entry
1007
self.target = target
1008
1009
class RenameConflict(Exception):
1010
def __init__(self, id, this_name, base_name, other_name):
1011
msg = """Trees all have different names for a file
1012
this: %s
1013
base: %s
1014
other: %s
1015
id: %s""" % (this_name, base_name, other_name, id)
1016
Exception.__init__(self, msg)
1017
self.this_name = this_name
1018
self.base_name = base_name
1019
self_other_name = other_name
1020
1021
class MoveConflict(Exception):
1022
def __init__(self, id, this_parent, base_parent, other_parent):
1023
msg = """The file is in different directories in every tree
1024
this: %s
1025
base: %s
1026
other: %s
1027
id: %s""" % (this_parent, base_parent, other_parent, id)
1028
Exception.__init__(self, msg)
1029
self.this_parent = this_parent
1030
self.base_parent = base_parent
1031
self_other_parent = other_parent
1032
1033
class MergeConflict(Exception):
1034
def __init__(self, this_path):
1035
Exception.__init__(self, "Conflict applying changes to %s" % this_path)
1036
self.this_path = this_path
1037
1038
class WrongOldContents(Exception):
1039
def __init__(self, filename):
1040
msg = "Contents mismatch deleting %s" % filename
1041
self.filename = filename
1042
Exception.__init__(self, msg)
1043
1044
class WrongOldExecFlag(Exception):
1045
def __init__(self, filename, old_exec_flag, new_exec_flag):
1046
msg = "Executable flag missmatch on %s:\n" \
1047
"Expected %s, got %s." % (filename, old_exec_flag, new_exec_flag)
1048
self.filename = filename
1049
Exception.__init__(self, msg)
1050
1051
class RemoveContentsConflict(Exception):
1052
def __init__(self, filename):
1053
msg = "Conflict deleting %s, which has different contents in BASE"\
1054
" and THIS" % filename
1055
self.filename = filename
1056
Exception.__init__(self, msg)
1057
1058
class DeletingNonEmptyDirectory(Exception):
1059
def __init__(self, filename):
1060
msg = "Trying to remove dir %s while it still had files" % filename
1061
self.filename = filename
1062
Exception.__init__(self, msg)
1063
1064
1065
class PatchTargetMissing(Exception):
1066
def __init__(self, filename):
1067
msg = "Attempt to patch %s, which does not exist" % filename
1068
Exception.__init__(self, msg)
1069
self.filename = filename
1070
1071
class MissingForSetExec(Exception):
1072
def __init__(self, filename):
1073
msg = "Attempt to change permissions on %s, which does not exist" %\
1074
filename
1075
Exception.__init__(self, msg)
1076
self.filename = filename
1077
1078
class MissingForRm(Exception):
1079
def __init__(self, filename):
1080
msg = "Attempt to remove missing path %s" % filename
1081
Exception.__init__(self, msg)
1082
self.filename = filename
1083
1084
1085
class MissingForRename(Exception):
1086
def __init__(self, filename, to_path):
1087
msg = "Attempt to move missing path %s to %s" % (filename, to_path)
1088
Exception.__init__(self, msg)
1089
self.filename = filename
1090
1091
class NewContentsConflict(Exception):
1092
def __init__(self, filename):
1093
msg = "Conflicting contents for new file %s" % (filename)
1094
Exception.__init__(self, msg)
1095
1096
class WeaveMergeConflict(Exception):
1097
def __init__(self, filename):
1098
msg = "Conflicting contents for file %s" % (filename)
1099
Exception.__init__(self, msg)
1100
1101
class ThreewayContentsConflict(Exception):
1102
def __init__(self, filename):
1103
msg = "Conflicting contents for file %s" % (filename)
1104
Exception.__init__(self, msg)
1105
1106
1107
class MissingForMerge(Exception):
1108
def __init__(self, filename):
1109
msg = "The file %s was modified, but does not exist in this tree"\
1110
% (filename)
1111
Exception.__init__(self, msg)
1112
1113
1114
class ExceptionConflictHandler(object):
1115
"""Default handler for merge exceptions.
1116
1117
This throws an error on any kind of conflict. Conflict handlers can
1118
descend from this class if they have a better way to handle some or
1119
all types of conflict.
1120
"""
1121
def missing_parent(self, pathname):
1122
parent = os.path.dirname(pathname)
1123
raise Exception("Parent directory missing for %s" % pathname)
1124
1125
def dir_exists(self, pathname):
1126
raise Exception("Directory already exists for %s" % pathname)
1127
1128
def failed_hunks(self, pathname):
1129
raise Exception("Failed to apply some hunks for %s" % pathname)
1130
1131
def target_exists(self, entry, target, old_path):
1132
raise TargetExists(entry, target)
1133
1134
def rename_conflict(self, id, this_name, base_name, other_name):
1135
raise RenameConflict(id, this_name, base_name, other_name)
1136
1137
def move_conflict(self, id, this_dir, base_dir, other_dir):
1138
raise MoveConflict(id, this_dir, base_dir, other_dir)
1139
1140
def merge_conflict(self, new_file, this_path, base_lines, other_lines):
1141
os.unlink(new_file)
1142
raise MergeConflict(this_path)
1143
1144
def wrong_old_contents(self, filename, expected_contents):
1145
raise WrongOldContents(filename)
1146
1147
def rem_contents_conflict(self, filename, this_contents, base_contents):
1148
raise RemoveContentsConflict(filename)
1149
1150
def wrong_old_exec_flag(self, filename, old_exec_flag, new_exec_flag):
1151
raise WrongOldExecFlag(filename, old_exec_flag, new_exec_flag)
1152
1153
def rmdir_non_empty(self, filename):
1154
raise DeletingNonEmptyDirectory(filename)
1155
1156
def link_name_exists(self, filename):
1157
raise TargetExists(filename)
1158
1159
def patch_target_missing(self, filename, contents):
1160
raise PatchTargetMissing(filename)
1161
1162
def missing_for_exec_flag(self, filename):
1163
raise MissingForExecFlag(filename)
1164
1165
def missing_for_rm(self, filename, change):
1166
raise MissingForRm(filename)
1167
1168
def missing_for_rename(self, filename, to_path):
1169
raise MissingForRename(filename, to_path)
1170
1171
def missing_for_merge(self, file_id, other_path):
1172
raise MissingForMerge(other_path)
1173
1174
def new_contents_conflict(self, filename, other_contents):
1175
raise NewContentsConflict(filename)
1176
1177
def weave_merge_conflict(self, filename, weave, other_i, out_file):
1178
raise WeaveMergeConflict(filename)
1179
1180
def threeway_contents_conflict(self, filename, this_contents,
1181
base_contents, other_contents):
1182
raise ThreewayContentsConflict(filename)
1183
1184
def finalize(self):
1185
pass
1186
1187
def apply_changeset(changeset, inventory, dir, conflict_handler=None,
1188
reverse=False):
1189
"""Apply a changeset to a directory.
1190
1191
:param changeset: The changes to perform
1192
:type changeset: `Changeset`
1193
:param inventory: The mapping of id to filename for the directory
1194
:type inventory: Dictionary
1195
:param dir: The path of the directory to apply the changes to
1196
:type dir: str
1197
:param reverse: If true, apply the changes in reverse
1198
:type reverse: bool
1199
:return: The mapping of the changed entries
1200
:rtype: Dictionary
1201
"""
1202
if conflict_handler is None:
1203
conflict_handler = ExceptionConflictHandler()
1204
temp_dir = os.path.join(dir, "bzr-tree-change")
1205
try:
1206
os.mkdir(temp_dir)
1207
except OSError, e:
1208
if e.errno == errno.EEXIST:
1209
try:
1210
os.rmdir(temp_dir)
1211
except OSError, e:
1212
if e.errno == errno.ENOTEMPTY:
1213
raise OldFailedTreeOp()
1214
os.mkdir(temp_dir)
1215
else:
1216
raise
1217
1218
#apply changes that don't affect filenames
1219
for entry in changeset.entries.itervalues():
1220
if not entry.is_creation_or_deletion() and not entry.is_boring():
1221
if entry.id not in inventory:
1222
warning("entry {%s} no longer present, can't be updated",
1223
entry.id)
1224
continue
1225
path = os.path.join(dir, inventory[entry.id])
1226
entry.apply(path, conflict_handler, reverse)
1227
1228
# Apply renames in stages, to minimize conflicts:
1229
# Only files whose name or parent change are interesting, because their
1230
# target name may exist in the source tree. If a directory's name changes,
1231
# that doesn't make its children interesting.
1232
(source_entries, target_entries) = get_rename_entries(changeset, inventory,
1233
reverse)
1234
1235
changed_inventory = rename_to_temp_delete(source_entries, inventory, dir,
1236
temp_dir, conflict_handler,
1237
reverse)
1238
1239
rename_to_new_create(changed_inventory, target_entries, inventory,
1240
changeset, dir, conflict_handler, reverse)
1241
os.rmdir(temp_dir)
1242
return changed_inventory
1243
1244
1245
def apply_changeset_tree(cset, tree, reverse=False):
1246
r_inventory = {}
1247
for entry in tree.source_inventory().itervalues():
1248
inventory[entry.id] = entry.path
1249
new_inventory = apply_changeset(cset, r_inventory, tree.basedir,
1250
reverse=reverse)
1251
new_entries, remove_entries = \
1252
get_inventory_change(inventory, new_inventory, cset, reverse)
1253
tree.update_source_inventory(new_entries, remove_entries)
1254
1255
1256
def get_inventory_change(inventory, new_inventory, cset, reverse=False):
1257
new_entries = {}
1258
remove_entries = []
1259
for entry in cset.entries.itervalues():
1260
if entry.needs_rename():
1261
new_path = entry.get_new_path(inventory, cset)
1262
if new_path is None:
1263
remove_entries.append(entry.id)
1264
else:
1265
new_entries[new_path] = entry.id
1266
return new_entries, remove_entries
1267
1268
1269
def print_changeset(cset):
1270
"""Print all non-boring changeset entries
1271
1272
:param cset: The changeset to print
1273
:type cset: `Changeset`
1274
"""
1275
for entry in cset.entries.itervalues():
1276
if entry.is_boring():
1277
continue
1278
print entry.id
1279
print entry.summarize_name(cset)
1280
1281
class CompositionFailure(Exception):
1282
def __init__(self, old_entry, new_entry, problem):
1283
msg = "Unable to conpose entries.\n %s" % problem
1284
Exception.__init__(self, msg)
1285
1286
class IDMismatch(CompositionFailure):
1287
def __init__(self, old_entry, new_entry):
1288
problem = "Attempt to compose entries with different ids: %s and %s" %\
1289
(old_entry.id, new_entry.id)
1290
CompositionFailure.__init__(self, old_entry, new_entry, problem)
1291
1292
def compose_changesets(old_cset, new_cset):
1293
"""Combine two changesets into one. This works well for exact patching.
1294
Otherwise, not so well.
1295
1296
:param old_cset: The first changeset that would be applied
1297
:type old_cset: `Changeset`
1298
:param new_cset: The second changeset that would be applied
1299
:type new_cset: `Changeset`
1300
:return: A changeset that combines the changes in both changesets
1301
:rtype: `Changeset`
1302
"""
1303
composed = Changeset()
1304
for old_entry in old_cset.entries.itervalues():
1305
new_entry = new_cset.entries.get(old_entry.id)
1306
if new_entry is None:
1307
composed.add_entry(old_entry)
1308
else:
1309
composed_entry = compose_entries(old_entry, new_entry)
1310
if composed_entry.parent is not None or\
1311
composed_entry.new_parent is not None:
1312
composed.add_entry(composed_entry)
1313
for new_entry in new_cset.entries.itervalues():
1314
if not old_cset.entries.has_key(new_entry.id):
1315
composed.add_entry(new_entry)
1316
return composed
1317
1318
def compose_entries(old_entry, new_entry):
1319
"""Combine two entries into one.
1320
1321
:param old_entry: The first entry that would be applied
1322
:type old_entry: ChangesetEntry
1323
:param old_entry: The second entry that would be applied
1324
:type old_entry: ChangesetEntry
1325
:return: A changeset entry combining both entries
1326
:rtype: `ChangesetEntry`
1327
"""
1328
if old_entry.id != new_entry.id:
1329
raise IDMismatch(old_entry, new_entry)
1330
output = ChangesetEntry(old_entry.id, old_entry.parent, old_entry.path)
1331
1332
if (old_entry.parent != old_entry.new_parent or
1333
new_entry.parent != new_entry.new_parent):
1334
output.new_parent = new_entry.new_parent
1335
1336
if (old_entry.path != old_entry.new_path or
1337
new_entry.path != new_entry.new_path):
1338
output.new_path = new_entry.new_path
1339
1340
output.contents_change = compose_contents(old_entry, new_entry)
1341
output.metadata_change = compose_metadata(old_entry, new_entry)
1342
return output
1343
1344
def compose_contents(old_entry, new_entry):
1345
"""Combine the contents of two changeset entries. Entries are combined
1346
intelligently where possible, but the fallback behavior returns an
1347
ApplySequence.
1348
1349
:param old_entry: The first entry that would be applied
1350
:type old_entry: `ChangesetEntry`
1351
:param new_entry: The second entry that would be applied
1352
:type new_entry: `ChangesetEntry`
1353
:return: A combined contents change
1354
:rtype: anything supporting the apply(reverse=False) method
1355
"""
1356
old_contents = old_entry.contents_change
1357
new_contents = new_entry.contents_change
1358
if old_entry.contents_change is None:
1359
return new_entry.contents_change
1360
elif new_entry.contents_change is None:
1361
return old_entry.contents_change
1362
elif isinstance(old_contents, ReplaceContents) and \
1363
isinstance(new_contents, ReplaceContents):
1364
if old_contents.old_contents == new_contents.new_contents:
1365
return None
1366
else:
1367
return ReplaceContents(old_contents.old_contents,
1368
new_contents.new_contents)
1369
elif isinstance(old_contents, ApplySequence):
1370
output = ApplySequence(old_contents.changes)
1371
if isinstance(new_contents, ApplySequence):
1372
output.changes.extend(new_contents.changes)
1373
else:
1374
output.changes.append(new_contents)
1375
return output
1376
elif isinstance(new_contents, ApplySequence):
1377
output = ApplySequence((old_contents.changes,))
1378
output.extend(new_contents.changes)
1379
return output
1380
else:
1381
return ApplySequence((old_contents, new_contents))
1382
1383
def compose_metadata(old_entry, new_entry):
1384
old_meta = old_entry.metadata_change
1385
new_meta = new_entry.metadata_change
1386
if old_meta is None:
1387
return new_meta
1388
elif new_meta is None:
1389
return old_meta
1390
elif (isinstance(old_meta, ChangeExecFlag) and
1391
isinstance(new_meta, ChangeExecFlag)):
1392
return ChangeExecFlag(old_meta.old_exec_flag, new_meta.new_exec_flag)
1393
else:
1394
return ApplySequence(old_meta, new_meta)
1395
1396
1397
def changeset_is_null(changeset):
1398
for entry in changeset.entries.itervalues():
1399
if not entry.is_boring():
1400
return False
1401
return True
1402
1403
class UnsupportedFiletype(Exception):
1404
def __init__(self, kind, full_path):
1405
msg = "The file \"%s\" is a %s, which is not a supported filetype." \
1406
% (full_path, kind)
1407
Exception.__init__(self, msg)
1408
self.full_path = full_path
1409
self.kind = kind
1410
1411
def generate_changeset(tree_a, tree_b, interesting_ids=None):
1412
return ChangesetGenerator(tree_a, tree_b, interesting_ids)()
1413
1414
1415
class ChangesetGenerator(object):
1416
def __init__(self, tree_a, tree_b, interesting_ids=None):
1417
object.__init__(self)
1418
self.tree_a = tree_a
1419
self.tree_b = tree_b
1420
self._interesting_ids = interesting_ids
1421
1422
def iter_both_tree_ids(self):
1423
for file_id in self.tree_a:
1424
yield file_id
1425
for file_id in self.tree_b:
1426
if file_id not in self.tree_a:
1427
yield file_id
1428
1429
def __call__(self):
1430
cset = Changeset()
1431
for file_id in self.iter_both_tree_ids():
1432
cs_entry = self.make_entry(file_id)
1433
if cs_entry is not None and not cs_entry.is_boring():
1434
cset.add_entry(cs_entry)
1435
1436
for entry in list(cset.entries.itervalues()):
1437
if entry.parent != entry.new_parent:
1438
if not cset.entries.has_key(entry.parent) and\
1439
entry.parent != NULL_ID and entry.parent is not None:
1440
parent_entry = self.make_boring_entry(entry.parent)
1441
cset.add_entry(parent_entry)
1442
if not cset.entries.has_key(entry.new_parent) and\
1443
entry.new_parent != NULL_ID and \
1444
entry.new_parent is not None:
1445
parent_entry = self.make_boring_entry(entry.new_parent)
1446
cset.add_entry(parent_entry)
1447
return cset
1448
1449
def iter_inventory(self, tree):
1450
for file_id in tree:
1451
yield self.get_entry(file_id, tree)
1452
1453
def get_entry(self, file_id, tree):
1454
if not tree.has_or_had_id(file_id):
1455
return None
1456
return tree.inventory[file_id]
1457
1458
def get_entry_parent(self, entry):
1459
if entry is None:
1460
return None
1461
return entry.parent_id
1462
1463
def get_path(self, file_id, tree):
1464
if not tree.has_or_had_id(file_id):
1465
return None
1466
path = tree.id2path(file_id)
1467
if path == '':
1468
return './.'
1469
else:
1470
return path
1471
1472
def make_basic_entry(self, file_id, only_interesting):
1473
entry_a = self.get_entry(file_id, self.tree_a)
1474
entry_b = self.get_entry(file_id, self.tree_b)
1475
if only_interesting and not self.is_interesting(entry_a, entry_b):
1476
return None
1477
parent = self.get_entry_parent(entry_a)
1478
path = self.get_path(file_id, self.tree_a)
1479
cs_entry = ChangesetEntry(file_id, parent, path)
1480
new_parent = self.get_entry_parent(entry_b)
1481
1482
new_path = self.get_path(file_id, self.tree_b)
1483
1484
cs_entry.new_path = new_path
1485
cs_entry.new_parent = new_parent
1486
return cs_entry
1487
1488
def is_interesting(self, entry_a, entry_b):
1489
if self._interesting_ids is None:
1490
return True
1491
if entry_a is not None:
1492
file_id = entry_a.file_id
1493
elif entry_b is not None:
1494
file_id = entry_b.file_id
1495
else:
1496
return False
1497
return file_id in self._interesting_ids
1498
1499
def make_boring_entry(self, id):
1500
cs_entry = self.make_basic_entry(id, only_interesting=False)
1501
if cs_entry.is_creation_or_deletion():
1502
return self.make_entry(id, only_interesting=False)
1503
else:
1504
return cs_entry
1505
1506
1507
def make_entry(self, id, only_interesting=True):
1508
cs_entry = self.make_basic_entry(id, only_interesting)
1509
1510
if cs_entry is None:
1511
return None
1512
1513
cs_entry.metadata_change = self.make_exec_flag_change(id)
1514
1515
if id in self.tree_a and id in self.tree_b:
1516
a_sha1 = self.tree_a.get_file_sha1(id)
1517
b_sha1 = self.tree_b.get_file_sha1(id)
1518
if None not in (a_sha1, b_sha1) and a_sha1 == b_sha1:
1519
return cs_entry
1520
1521
cs_entry.contents_change = self.make_contents_change(id)
1522
return cs_entry
1523
1524
def make_exec_flag_change(self, file_id):
1525
exec_flag_a = exec_flag_b = None
1526
if file_id in self.tree_a and self.tree_a.kind(file_id) == "file":
1527
exec_flag_a = self.tree_a.is_executable(file_id)
1528
1529
if file_id in self.tree_b and self.tree_b.kind(file_id) == "file":
1530
exec_flag_b = self.tree_b.is_executable(file_id)
1531
1532
if exec_flag_a == exec_flag_b:
1533
return None
1534
return ChangeExecFlag(exec_flag_a, exec_flag_b)
1535
1536
def make_contents_change(self, file_id):
1537
a_contents = get_contents(self.tree_a, file_id)
1538
b_contents = get_contents(self.tree_b, file_id)
1539
if a_contents == b_contents:
1540
return None
1541
return ReplaceContents(a_contents, b_contents)
1542
1543
1544
def get_contents(tree, file_id):
1545
"""Return the appropriate contents to create a copy of file_id from tree"""
1546
if file_id not in tree:
1547
return None
1548
kind = tree.kind(file_id)
1549
if kind == "file":
1550
return TreeFileCreate(tree, file_id)
1551
elif kind in ("directory", "root_directory"):
1552
return dir_create
1553
elif kind == "symlink":
1554
return SymlinkCreate(tree.get_symlink_target(file_id))
1555
else:
1556
raise UnsupportedFiletype(kind, tree.id2path(file_id))
1557
1558
1559
def full_path(entry, tree):
1560
return os.path.join(tree.basedir, entry.path)
1561
1562
def new_delete_entry(entry, tree, inventory, delete):
1563
if entry.path == "":
1564
parent = NULL_ID
1565
else:
1566
parent = inventory[dirname(entry.path)].id
1567
cs_entry = ChangesetEntry(parent, entry.path)
1568
if delete:
1569
cs_entry.new_path = None
1570
cs_entry.new_parent = None
1571
else:
1572
cs_entry.path = None
1573
cs_entry.parent = None
1574
full_path = full_path(entry, tree)
1575
status = os.lstat(full_path)
1576
if stat.S_ISDIR(file_stat.st_mode):
1577
action = dir_create
1578
1579
1580
1581
1582
# XXX: Can't we unify this with the regular inventory object
1583
class Inventory(object):
1584
def __init__(self, inventory):
1585
self.inventory = inventory
1586
self.rinventory = None
1587
1588
def get_rinventory(self):
1589
if self.rinventory is None:
1590
self.rinventory = invert_dict(self.inventory)
1591
return self.rinventory
1592
1593
def get_path(self, id):
1594
return self.inventory.get(id)
1595
1596
def get_name(self, id):
1597
path = self.get_path(id)
1598
if path is None:
1599
return None
1600
else:
1601
return os.path.basename(path)
1602
1603
def get_dir(self, id):
1604
path = self.get_path(id)
1605
if path == "":
1606
return None
1607
if path is None:
1608
return None
1609
return os.path.dirname(path)
1610
1611
def get_parent(self, id):
1612
if self.get_path(id) is None:
1613
return None
1614
directory = self.get_dir(id)
1615
if directory == '.':
1616
directory = u'./.'
1617
if directory is None:
1618
return NULL_ID
1619
return self.get_rinventory().get(directory)
Loggerhead is a web-based interface for Breezy
Version: 2.0.1