1
# Copyright (C) 2006, 2007 Canonical Ltd
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.
8
# 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.
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
19
from stat import S_ISREG
21
from bzrlib.lazy_import import lazy_import
22
lazy_import(globals(), """
30
from bzrlib.errors import (DuplicateKey, MalformedTransform, NoSuchFile,
31
ReusingTransform, NotVersionedError, CantMoveRoot,
32
ExistingLimbo, ImmortalLimbo, NoFinalPath,
34
from bzrlib.inventory import InventoryEntry
35
from bzrlib.osutils import (file_kind, supports_executable, pathjoin, lexists,
36
delete_any, has_symlinks)
37
from bzrlib.progress import DummyProgress, ProgressPhase
38
from bzrlib.symbol_versioning import (
43
from bzrlib.trace import mutter, warning
44
from bzrlib import tree
46
import bzrlib.urlutils as urlutils
49
ROOT_PARENT = "root-parent"
52
def unique_add(map, key, value):
54
raise DuplicateKey(key=key)
58
class _TransformResults(object):
59
def __init__(self, modified_paths, rename_count):
61
self.modified_paths = modified_paths
62
self.rename_count = rename_count
65
class TreeTransform(object):
66
"""Represent a tree transformation.
68
This object is designed to support incremental generation of the transform,
71
However, it gives optimum performance when parent directories are created
72
before their contents. The transform is then able to put child files
73
directly in their parent directory, avoiding later renames.
75
It is easy to produce malformed transforms, but they are generally
76
harmless. Attempting to apply a malformed transform will cause an
77
exception to be raised before any modifications are made to the tree.
79
Many kinds of malformed transforms can be corrected with the
80
resolve_conflicts function. The remaining ones indicate programming error,
81
such as trying to create a file with no path.
83
Two sets of file creation methods are supplied. Convenience methods are:
88
These are composed of the low-level methods:
90
* create_file or create_directory or create_symlink
94
Transform/Transaction ids
95
-------------------------
96
trans_ids are temporary ids assigned to all files involved in a transform.
97
It's possible, even common, that not all files in the Tree have trans_ids.
99
trans_ids are used because filenames and file_ids are not good enough
100
identifiers; filenames change, and not all files have file_ids. File-ids
101
are also associated with trans-ids, so that moving a file moves its
104
trans_ids are only valid for the TreeTransform that generated them.
108
Limbo is a temporary directory use to hold new versions of files.
109
Files are added to limbo by create_file, create_directory, create_symlink,
110
and their convenience variants (new_*). Files may be removed from limbo
111
using cancel_creation. Files are renamed from limbo into their final
112
location as part of TreeTransform.apply
114
Limbo must be cleaned up, by either calling TreeTransform.apply or
115
calling TreeTransform.finalize.
117
Files are placed into limbo inside their parent directories, where
118
possible. This reduces subsequent renames, and makes operations involving
119
lots of files faster. This optimization is only possible if the parent
120
directory is created *before* creating any of its children, so avoid
121
creating children before parents, where possible.
125
This temporary directory is used by _FileMover for storing files that are
126
about to be deleted. In case of rollback, the files will be restored.
127
FileMover does not delete files until it is sure that a rollback will not
130
def __init__(self, tree, pb=DummyProgress()):
131
"""Note: a tree_write lock is taken on the tree.
133
Use TreeTransform.finalize() to release the lock (can be omitted if
134
TreeTransform.apply() called).
136
object.__init__(self)
138
self._tree.lock_tree_write()
140
control_files = self._tree._control_files
141
self._limbodir = urlutils.local_path_from_url(
142
control_files.controlfilename('limbo'))
144
os.mkdir(self._limbodir)
146
if e.errno == errno.EEXIST:
147
raise ExistingLimbo(self._limbodir)
148
self._deletiondir = urlutils.local_path_from_url(
149
control_files.controlfilename('pending-deletion'))
151
os.mkdir(self._deletiondir)
153
if e.errno == errno.EEXIST:
154
raise errors.ExistingPendingDeletion(self._deletiondir)
160
# counter used to generate trans-ids (which are locally unique)
162
# mapping of trans_id -> new basename
164
# mapping of trans_id -> new parent trans_id
165
self._new_parent = {}
166
# mapping of trans_id with new contents -> new file_kind
167
self._new_contents = {}
168
# A mapping of transform ids to their limbo filename
169
self._limbo_files = {}
170
# A mapping of transform ids to a set of the transform ids of children
171
# that their limbo directory has
172
self._limbo_children = {}
173
# Map transform ids to maps of child filename to child transform id
174
self._limbo_children_names = {}
175
# List of transform ids that need to be renamed from limbo into place
176
self._needs_rename = set()
177
# Set of trans_ids whose contents will be removed
178
self._removed_contents = set()
179
# Mapping of trans_id -> new execute-bit value
180
self._new_executability = {}
181
# Mapping of trans_id -> new tree-reference value
182
self._new_reference_revision = {}
183
# Mapping of trans_id -> new file_id
185
# Mapping of old file-id -> trans_id
186
self._non_present_ids = {}
187
# Mapping of new file_id -> trans_id
189
# Set of file_ids that will be removed
190
self._removed_id = set()
191
# Mapping of path in old tree -> trans_id
192
self._tree_path_ids = {}
193
# Mapping trans_id -> path in old tree
194
self._tree_id_paths = {}
195
# Cache of realpath results, to speed up canonical_path
197
# Cache of relpath results, to speed up canonical_path
199
# The trans_id that will be used as the tree root
200
self._new_root = self.trans_id_tree_file_id(tree.get_root_id())
201
# Indictor of whether the transform has been applied
205
# A counter of how many files have been renamed
206
self.rename_count = 0
208
def __get_root(self):
209
return self._new_root
211
root = property(__get_root)
214
"""Release the working tree lock, if held, clean up limbo dir.
216
This is required if apply has not been invoked, but can be invoked
219
if self._tree is None:
222
entries = [(self._limbo_name(t), t, k) for t, k in
223
self._new_contents.iteritems()]
224
entries.sort(reverse=True)
225
for path, trans_id, kind in entries:
226
if kind == "directory":
231
os.rmdir(self._limbodir)
233
# We don't especially care *why* the dir is immortal.
234
raise ImmortalLimbo(self._limbodir)
236
os.rmdir(self._deletiondir)
238
raise errors.ImmortalPendingDeletion(self._deletiondir)
243
def _assign_id(self):
244
"""Produce a new tranform id"""
245
new_id = "new-%s" % self._id_number
249
def create_path(self, name, parent):
250
"""Assign a transaction id to a new path"""
251
trans_id = self._assign_id()
252
unique_add(self._new_name, trans_id, name)
253
unique_add(self._new_parent, trans_id, parent)
256
def adjust_path(self, name, parent, trans_id):
257
"""Change the path that is assigned to a transaction id."""
258
if trans_id == self._new_root:
260
previous_parent = self._new_parent.get(trans_id)
261
previous_name = self._new_name.get(trans_id)
262
self._new_name[trans_id] = name
263
self._new_parent[trans_id] = parent
264
if (trans_id in self._limbo_files and
265
trans_id not in self._needs_rename):
266
self._rename_in_limbo([trans_id])
267
self._limbo_children[previous_parent].remove(trans_id)
268
del self._limbo_children_names[previous_parent][previous_name]
270
def _rename_in_limbo(self, trans_ids):
271
"""Fix limbo names so that the right final path is produced.
273
This means we outsmarted ourselves-- we tried to avoid renaming
274
these files later by creating them with their final names in their
275
final parents. But now the previous name or parent is no longer
276
suitable, so we have to rename them.
278
Even for trans_ids that have no new contents, we must remove their
279
entries from _limbo_files, because they are now stale.
281
for trans_id in trans_ids:
282
old_path = self._limbo_files.pop(trans_id)
283
if trans_id not in self._new_contents:
285
new_path = self._limbo_name(trans_id)
286
os.rename(old_path, new_path)
288
def adjust_root_path(self, name, parent):
289
"""Emulate moving the root by moving all children, instead.
291
We do this by undoing the association of root's transaction id with the
292
current tree. This allows us to create a new directory with that
293
transaction id. We unversion the root directory and version the
294
physically new directory, and hope someone versions the tree root
297
old_root = self._new_root
298
old_root_file_id = self.final_file_id(old_root)
299
# force moving all children of root
300
for child_id in self.iter_tree_children(old_root):
301
if child_id != parent:
302
self.adjust_path(self.final_name(child_id),
303
self.final_parent(child_id), child_id)
304
file_id = self.final_file_id(child_id)
305
if file_id is not None:
306
self.unversion_file(child_id)
307
self.version_file(file_id, child_id)
309
# the physical root needs a new transaction id
310
self._tree_path_ids.pop("")
311
self._tree_id_paths.pop(old_root)
312
self._new_root = self.trans_id_tree_file_id(self._tree.get_root_id())
313
if parent == old_root:
314
parent = self._new_root
315
self.adjust_path(name, parent, old_root)
316
self.create_directory(old_root)
317
self.version_file(old_root_file_id, old_root)
318
self.unversion_file(self._new_root)
320
def trans_id_tree_file_id(self, inventory_id):
321
"""Determine the transaction id of a working tree file.
323
This reflects only files that already exist, not ones that will be
324
added by transactions.
326
path = self._tree.inventory.id2path(inventory_id)
327
return self.trans_id_tree_path(path)
329
def trans_id_file_id(self, file_id):
330
"""Determine or set the transaction id associated with a file ID.
331
A new id is only created for file_ids that were never present. If
332
a transaction has been unversioned, it is deliberately still returned.
333
(this will likely lead to an unversioned parent conflict.)
335
if file_id in self._r_new_id and self._r_new_id[file_id] is not None:
336
return self._r_new_id[file_id]
337
elif file_id in self._tree.inventory:
338
return self.trans_id_tree_file_id(file_id)
339
elif file_id in self._non_present_ids:
340
return self._non_present_ids[file_id]
342
trans_id = self._assign_id()
343
self._non_present_ids[file_id] = trans_id
346
def canonical_path(self, path):
347
"""Get the canonical tree-relative path"""
348
# don't follow final symlinks
349
abs = self._tree.abspath(path)
350
if abs in self._relpaths:
351
return self._relpaths[abs]
352
dirname, basename = os.path.split(abs)
353
if dirname not in self._realpaths:
354
self._realpaths[dirname] = os.path.realpath(dirname)
355
dirname = self._realpaths[dirname]
356
abs = pathjoin(dirname, basename)
357
if dirname in self._relpaths:
358
relpath = pathjoin(self._relpaths[dirname], basename)
359
relpath = relpath.rstrip('/\\')
361
relpath = self._tree.relpath(abs)
362
self._relpaths[abs] = relpath
365
def trans_id_tree_path(self, path):
366
"""Determine (and maybe set) the transaction ID for a tree path."""
367
path = self.canonical_path(path)
368
if path not in self._tree_path_ids:
369
self._tree_path_ids[path] = self._assign_id()
370
self._tree_id_paths[self._tree_path_ids[path]] = path
371
return self._tree_path_ids[path]
373
def get_tree_parent(self, trans_id):
374
"""Determine id of the parent in the tree."""
375
path = self._tree_id_paths[trans_id]
378
return self.trans_id_tree_path(os.path.dirname(path))
380
def create_file(self, contents, trans_id, mode_id=None):
381
"""Schedule creation of a new file.
385
Contents is an iterator of strings, all of which will be written
386
to the target destination.
388
New file takes the permissions of any existing file with that id,
389
unless mode_id is specified.
391
name = self._limbo_name(trans_id)
395
unique_add(self._new_contents, trans_id, 'file')
397
# Clean up the file, it never got registered so
398
# TreeTransform.finalize() won't clean it up.
403
f.writelines(contents)
406
self._set_mode(trans_id, mode_id, S_ISREG)
408
def _set_mode(self, trans_id, mode_id, typefunc):
409
"""Set the mode of new file contents.
410
The mode_id is the existing file to get the mode from (often the same
411
as trans_id). The operation is only performed if there's a mode match
412
according to typefunc.
417
old_path = self._tree_id_paths[mode_id]
421
mode = os.stat(self._tree.abspath(old_path)).st_mode
423
if e.errno == errno.ENOENT:
428
os.chmod(self._limbo_name(trans_id), mode)
430
def create_directory(self, trans_id):
431
"""Schedule creation of a new directory.
433
See also new_directory.
435
os.mkdir(self._limbo_name(trans_id))
436
unique_add(self._new_contents, trans_id, 'directory')
438
def create_symlink(self, target, trans_id):
439
"""Schedule creation of a new symbolic link.
441
target is a bytestring.
442
See also new_symlink.
445
os.symlink(target, self._limbo_name(trans_id))
446
unique_add(self._new_contents, trans_id, 'symlink')
449
path = FinalPaths(self).get_path(trans_id)
452
raise UnableCreateSymlink(path=path)
454
def cancel_creation(self, trans_id):
455
"""Cancel the creation of new file contents."""
456
del self._new_contents[trans_id]
457
children = self._limbo_children.get(trans_id)
458
# if this is a limbo directory with children, move them before removing
460
if children is not None:
461
self._rename_in_limbo(children)
462
del self._limbo_children[trans_id]
463
del self._limbo_children_names[trans_id]
464
delete_any(self._limbo_name(trans_id))
466
def delete_contents(self, trans_id):
467
"""Schedule the contents of a path entry for deletion"""
468
self.tree_kind(trans_id)
469
self._removed_contents.add(trans_id)
471
def cancel_deletion(self, trans_id):
472
"""Cancel a scheduled deletion"""
473
self._removed_contents.remove(trans_id)
475
def unversion_file(self, trans_id):
476
"""Schedule a path entry to become unversioned"""
477
self._removed_id.add(trans_id)
479
def delete_versioned(self, trans_id):
480
"""Delete and unversion a versioned file"""
481
self.delete_contents(trans_id)
482
self.unversion_file(trans_id)
484
def set_executability(self, executability, trans_id):
485
"""Schedule setting of the 'execute' bit
486
To unschedule, set to None
488
if executability is None:
489
del self._new_executability[trans_id]
491
unique_add(self._new_executability, trans_id, executability)
493
def set_tree_reference(self, revision_id, trans_id):
494
"""Set the reference associated with a directory"""
495
unique_add(self._new_reference_revision, trans_id, revision_id)
497
def version_file(self, file_id, trans_id):
498
"""Schedule a file to become versioned."""
499
assert file_id is not None
500
unique_add(self._new_id, trans_id, file_id)
501
unique_add(self._r_new_id, file_id, trans_id)
503
def cancel_versioning(self, trans_id):
504
"""Undo a previous versioning of a file"""
505
file_id = self._new_id[trans_id]
506
del self._new_id[trans_id]
507
del self._r_new_id[file_id]
510
"""Determine the paths of all new and changed files"""
512
fp = FinalPaths(self)
513
for id_set in (self._new_name, self._new_parent, self._new_contents,
514
self._new_id, self._new_executability):
515
new_ids.update(id_set)
516
new_paths = [(fp.get_path(t), t) for t in new_ids]
520
def tree_kind(self, trans_id):
521
"""Determine the file kind in the working tree.
523
Raises NoSuchFile if the file does not exist
525
path = self._tree_id_paths.get(trans_id)
527
raise NoSuchFile(None)
529
return file_kind(self._tree.abspath(path))
531
if e.errno != errno.ENOENT:
534
raise NoSuchFile(path)
536
def final_kind(self, trans_id):
537
"""Determine the final file kind, after any changes applied.
539
Raises NoSuchFile if the file does not exist/has no contents.
540
(It is conceivable that a path would be created without the
541
corresponding contents insertion command)
543
if trans_id in self._new_contents:
544
return self._new_contents[trans_id]
545
elif trans_id in self._removed_contents:
546
raise NoSuchFile(None)
548
return self.tree_kind(trans_id)
550
def tree_file_id(self, trans_id):
551
"""Determine the file id associated with the trans_id in the tree"""
553
path = self._tree_id_paths[trans_id]
555
# the file is a new, unversioned file, or invalid trans_id
557
# the file is old; the old id is still valid
558
if self._new_root == trans_id:
559
return self._tree.get_root_id()
560
return self._tree.inventory.path2id(path)
562
def final_file_id(self, trans_id):
563
"""Determine the file id after any changes are applied, or None.
565
None indicates that the file will not be versioned after changes are
569
# there is a new id for this file
570
assert self._new_id[trans_id] is not None
571
return self._new_id[trans_id]
573
if trans_id in self._removed_id:
575
return self.tree_file_id(trans_id)
577
def inactive_file_id(self, trans_id):
578
"""Return the inactive file_id associated with a transaction id.
579
That is, the one in the tree or in non_present_ids.
580
The file_id may actually be active, too.
582
file_id = self.tree_file_id(trans_id)
583
if file_id is not None:
585
for key, value in self._non_present_ids.iteritems():
586
if value == trans_id:
589
def final_parent(self, trans_id):
590
"""Determine the parent file_id, after any changes are applied.
592
ROOT_PARENT is returned for the tree root.
595
return self._new_parent[trans_id]
597
return self.get_tree_parent(trans_id)
599
def final_name(self, trans_id):
600
"""Determine the final filename, after all changes are applied."""
602
return self._new_name[trans_id]
605
return os.path.basename(self._tree_id_paths[trans_id])
607
raise NoFinalPath(trans_id, self)
610
"""Return a map of parent: children for known parents.
612
Only new paths and parents of tree files with assigned ids are used.
615
items = list(self._new_parent.iteritems())
616
items.extend((t, self.final_parent(t)) for t in
617
self._tree_id_paths.keys())
618
for trans_id, parent_id in items:
619
if parent_id not in by_parent:
620
by_parent[parent_id] = set()
621
by_parent[parent_id].add(trans_id)
624
def path_changed(self, trans_id):
625
"""Return True if a trans_id's path has changed."""
626
return (trans_id in self._new_name) or (trans_id in self._new_parent)
628
def new_contents(self, trans_id):
629
return (trans_id in self._new_contents)
631
def find_conflicts(self):
632
"""Find any violations of inventory or filesystem invariants"""
633
if self.__done is True:
634
raise ReusingTransform()
636
# ensure all children of all existent parents are known
637
# all children of non-existent parents are known, by definition.
638
self._add_tree_children()
639
by_parent = self.by_parent()
640
conflicts.extend(self._unversioned_parents(by_parent))
641
conflicts.extend(self._parent_loops())
642
conflicts.extend(self._duplicate_entries(by_parent))
643
conflicts.extend(self._duplicate_ids())
644
conflicts.extend(self._parent_type_conflicts(by_parent))
645
conflicts.extend(self._improper_versioning())
646
conflicts.extend(self._executability_conflicts())
647
conflicts.extend(self._overwrite_conflicts())
650
def _add_tree_children(self):
651
"""Add all the children of all active parents to the known paths.
653
Active parents are those which gain children, and those which are
654
removed. This is a necessary first step in detecting conflicts.
656
parents = self.by_parent().keys()
657
parents.extend([t for t in self._removed_contents if
658
self.tree_kind(t) == 'directory'])
659
for trans_id in self._removed_id:
660
file_id = self.tree_file_id(trans_id)
661
if self._tree.inventory[file_id].kind == 'directory':
662
parents.append(trans_id)
664
for parent_id in parents:
665
# ensure that all children are registered with the transaction
666
list(self.iter_tree_children(parent_id))
668
def iter_tree_children(self, parent_id):
669
"""Iterate through the entry's tree children, if any"""
671
path = self._tree_id_paths[parent_id]
675
children = os.listdir(self._tree.abspath(path))
677
if e.errno != errno.ENOENT and e.errno != errno.ESRCH:
681
for child in children:
682
childpath = joinpath(path, child)
683
if self._tree.is_control_filename(childpath):
685
yield self.trans_id_tree_path(childpath)
687
def has_named_child(self, by_parent, parent_id, name):
689
children = by_parent[parent_id]
692
for child in children:
693
if self.final_name(child) == name:
696
path = self._tree_id_paths[parent_id]
699
childpath = joinpath(path, name)
700
child_id = self._tree_path_ids.get(childpath)
702
return lexists(self._tree.abspath(childpath))
704
if self.final_parent(child_id) != parent_id:
706
if child_id in self._removed_contents:
707
# XXX What about dangling file-ids?
712
def _parent_loops(self):
713
"""No entry should be its own ancestor"""
715
for trans_id in self._new_parent:
718
while parent_id is not ROOT_PARENT:
721
parent_id = self.final_parent(parent_id)
724
if parent_id == trans_id:
725
conflicts.append(('parent loop', trans_id))
726
if parent_id in seen:
730
def _unversioned_parents(self, by_parent):
731
"""If parent directories are versioned, children must be versioned."""
733
for parent_id, children in by_parent.iteritems():
734
if parent_id is ROOT_PARENT:
736
if self.final_file_id(parent_id) is not None:
738
for child_id in children:
739
if self.final_file_id(child_id) is not None:
740
conflicts.append(('unversioned parent', parent_id))
744
def _improper_versioning(self):
745
"""Cannot version a file with no contents, or a bad type.
747
However, existing entries with no contents are okay.
750
for trans_id in self._new_id.iterkeys():
752
kind = self.final_kind(trans_id)
754
conflicts.append(('versioning no contents', trans_id))
756
if not InventoryEntry.versionable_kind(kind):
757
conflicts.append(('versioning bad kind', trans_id, kind))
760
def _executability_conflicts(self):
761
"""Check for bad executability changes.
763
Only versioned files may have their executability set, because
764
1. only versioned entries can have executability under windows
765
2. only files can be executable. (The execute bit on a directory
766
does not indicate searchability)
769
for trans_id in self._new_executability:
770
if self.final_file_id(trans_id) is None:
771
conflicts.append(('unversioned executability', trans_id))
774
non_file = self.final_kind(trans_id) != "file"
778
conflicts.append(('non-file executability', trans_id))
781
def _overwrite_conflicts(self):
782
"""Check for overwrites (not permitted on Win32)"""
784
for trans_id in self._new_contents:
786
self.tree_kind(trans_id)
789
if trans_id not in self._removed_contents:
790
conflicts.append(('overwrite', trans_id,
791
self.final_name(trans_id)))
794
def _duplicate_entries(self, by_parent):
795
"""No directory may have two entries with the same name."""
797
if (self._new_name, self._new_parent) == ({}, {}):
799
for children in by_parent.itervalues():
800
name_ids = [(self.final_name(t), t) for t in children]
801
if not self._tree.case_sensitive:
802
name_ids = [(n.lower(), t) for n, t in name_ids]
806
for name, trans_id in name_ids:
808
kind = self.final_kind(trans_id)
811
file_id = self.final_file_id(trans_id)
812
if kind is None and file_id is None:
814
if name == last_name:
815
conflicts.append(('duplicate', last_trans_id, trans_id,
818
last_trans_id = trans_id
821
def _duplicate_ids(self):
822
"""Each inventory id may only be used once"""
824
removed_tree_ids = set((self.tree_file_id(trans_id) for trans_id in
826
active_tree_ids = set((f for f in self._tree.inventory if
827
f not in removed_tree_ids))
828
for trans_id, file_id in self._new_id.iteritems():
829
if file_id in active_tree_ids:
830
old_trans_id = self.trans_id_tree_file_id(file_id)
831
conflicts.append(('duplicate id', old_trans_id, trans_id))
834
def _parent_type_conflicts(self, by_parent):
835
"""parents must have directory 'contents'."""
837
for parent_id, children in by_parent.iteritems():
838
if parent_id is ROOT_PARENT:
840
if not self._any_contents(children):
842
for child in children:
844
self.final_kind(child)
848
kind = self.final_kind(parent_id)
852
conflicts.append(('missing parent', parent_id))
853
elif kind != "directory":
854
conflicts.append(('non-directory parent', parent_id))
857
def _any_contents(self, trans_ids):
858
"""Return true if any of the trans_ids, will have contents."""
859
for trans_id in trans_ids:
861
kind = self.final_kind(trans_id)
867
def apply(self, no_conflicts=False, _mover=None):
868
"""Apply all changes to the inventory and filesystem.
870
If filesystem or inventory conflicts are present, MalformedTransform
873
If apply succeeds, finalize is not necessary.
875
:param no_conflicts: if True, the caller guarantees there are no
876
conflicts, so no check is made.
877
:param _mover: Supply an alternate FileMover, for testing
880
conflicts = self.find_conflicts()
881
if len(conflicts) != 0:
882
raise MalformedTransform(conflicts=conflicts)
883
inv = self._tree.inventory
885
child_pb = bzrlib.ui.ui_factory.nested_progress_bar()
892
child_pb.update('Apply phase', 0, 2)
893
self._apply_removals(inv, inventory_delta, mover)
894
child_pb.update('Apply phase', 1, 2)
895
modified_paths = self._apply_insertions(inv, inventory_delta,
901
mover.apply_deletions()
904
self._tree.apply_inventory_delta(inventory_delta)
907
return _TransformResults(modified_paths, self.rename_count)
909
def _limbo_name(self, trans_id):
910
"""Generate the limbo name of a file"""
911
limbo_name = self._limbo_files.get(trans_id)
912
if limbo_name is not None:
914
parent = self._new_parent.get(trans_id)
915
# if the parent directory is already in limbo (e.g. when building a
916
# tree), choose a limbo name inside the parent, to reduce further
918
use_direct_path = False
919
if self._new_contents.get(parent) == 'directory':
920
filename = self._new_name.get(trans_id)
921
if filename is not None:
922
if parent not in self._limbo_children:
923
self._limbo_children[parent] = set()
924
self._limbo_children_names[parent] = {}
925
use_direct_path = True
926
# the direct path can only be used if no other file has
927
# already taken this pathname, i.e. if the name is unused, or
928
# if it is already associated with this trans_id.
929
elif self._tree.case_sensitive:
930
if (self._limbo_children_names[parent].get(filename)
931
in (trans_id, None)):
932
use_direct_path = True
934
for l_filename, l_trans_id in\
935
self._limbo_children_names[parent].iteritems():
936
if l_trans_id == trans_id:
938
if l_filename.lower() == filename.lower():
941
use_direct_path = True
944
limbo_name = pathjoin(self._limbo_files[parent], filename)
945
self._limbo_children[parent].add(trans_id)
946
self._limbo_children_names[parent][filename] = trans_id
948
limbo_name = pathjoin(self._limbodir, trans_id)
949
self._needs_rename.add(trans_id)
950
self._limbo_files[trans_id] = limbo_name
953
def _apply_removals(self, inv, inventory_delta, mover):
954
"""Perform tree operations that remove directory/inventory names.
956
That is, delete files that are to be deleted, and put any files that
957
need renaming into limbo. This must be done in strict child-to-parent
960
tree_paths = list(self._tree_path_ids.iteritems())
961
tree_paths.sort(reverse=True)
962
child_pb = bzrlib.ui.ui_factory.nested_progress_bar()
964
for num, data in enumerate(tree_paths):
965
path, trans_id = data
966
child_pb.update('removing file', num, len(tree_paths))
967
full_path = self._tree.abspath(path)
968
if trans_id in self._removed_contents:
969
mover.pre_delete(full_path, os.path.join(self._deletiondir,
971
elif trans_id in self._new_name or trans_id in \
974
mover.rename(full_path, self._limbo_name(trans_id))
976
if e.errno != errno.ENOENT:
979
self.rename_count += 1
980
if trans_id in self._removed_id:
981
if trans_id == self._new_root:
982
file_id = self._tree.get_root_id()
984
file_id = self.tree_file_id(trans_id)
985
assert file_id is not None
986
inventory_delta.append((path, None, file_id, None))
990
def _apply_insertions(self, inv, inventory_delta, mover):
991
"""Perform tree operations that insert directory/inventory names.
993
That is, create any files that need to be created, and restore from
994
limbo any files that needed renaming. This must be done in strict
995
parent-to-child order.
997
new_paths = self.new_paths()
999
child_pb = bzrlib.ui.ui_factory.nested_progress_bar()
1002
for num, (path, trans_id) in enumerate(new_paths):
1004
child_pb.update('adding file', num, len(new_paths))
1006
kind = self._new_contents[trans_id]
1008
kind = contents = None
1009
if trans_id in self._new_contents or \
1010
self.path_changed(trans_id):
1011
full_path = self._tree.abspath(path)
1012
if trans_id in self._needs_rename:
1014
mover.rename(self._limbo_name(trans_id), full_path)
1016
# We may be renaming a dangling inventory id
1017
if e.errno != errno.ENOENT:
1020
self.rename_count += 1
1021
if trans_id in self._new_contents:
1022
modified_paths.append(full_path)
1023
completed_new.append(trans_id)
1025
if trans_id in self._new_id:
1027
kind = file_kind(self._tree.abspath(path))
1028
if trans_id in self._new_reference_revision:
1029
new_entry = inventory.TreeReference(
1030
self._new_id[trans_id],
1031
self._new_name[trans_id],
1032
self.final_file_id(self._new_parent[trans_id]),
1033
None, self._new_reference_revision[trans_id])
1035
new_entry = inventory.make_entry(kind,
1036
self.final_name(trans_id),
1037
self.final_file_id(self.final_parent(trans_id)),
1038
self._new_id[trans_id])
1040
if trans_id in self._new_name or trans_id in\
1041
self._new_parent or\
1042
trans_id in self._new_executability:
1043
file_id = self.final_file_id(trans_id)
1044
if file_id is not None:
1045
entry = inv[file_id]
1046
new_entry = entry.copy()
1048
if trans_id in self._new_name or trans_id in\
1050
if new_entry is not None:
1051
new_entry.name = self.final_name(trans_id)
1052
parent = self.final_parent(trans_id)
1053
parent_id = self.final_file_id(parent)
1054
new_entry.parent_id = parent_id
1056
if trans_id in self._new_executability:
1057
self._set_executability(path, new_entry, trans_id)
1058
if new_entry is not None:
1059
if new_entry.file_id in inv:
1060
old_path = inv.id2path(new_entry.file_id)
1063
inventory_delta.append((old_path, path,
1068
for trans_id in completed_new:
1069
del self._new_contents[trans_id]
1070
return modified_paths
1072
def _set_executability(self, path, entry, trans_id):
1073
"""Set the executability of versioned files """
1074
new_executability = self._new_executability[trans_id]
1075
entry.executable = new_executability
1076
if supports_executable():
1077
abspath = self._tree.abspath(path)
1078
current_mode = os.stat(abspath).st_mode
1079
if new_executability:
1082
to_mode = current_mode | (0100 & ~umask)
1083
# Enable x-bit for others only if they can read it.
1084
if current_mode & 0004:
1085
to_mode |= 0001 & ~umask
1086
if current_mode & 0040:
1087
to_mode |= 0010 & ~umask
1089
to_mode = current_mode & ~0111
1090
os.chmod(abspath, to_mode)
1092
def _new_entry(self, name, parent_id, file_id):
1093
"""Helper function to create a new filesystem entry."""
1094
trans_id = self.create_path(name, parent_id)
1095
if file_id is not None:
1096
self.version_file(file_id, trans_id)
1099
def new_file(self, name, parent_id, contents, file_id=None,
1101
"""Convenience method to create files.
1103
name is the name of the file to create.
1104
parent_id is the transaction id of the parent directory of the file.
1105
contents is an iterator of bytestrings, which will be used to produce
1107
:param file_id: The inventory ID of the file, if it is to be versioned.
1108
:param executable: Only valid when a file_id has been supplied.
1110
trans_id = self._new_entry(name, parent_id, file_id)
1111
# TODO: rather than scheduling a set_executable call,
1112
# have create_file create the file with the right mode.
1113
self.create_file(contents, trans_id)
1114
if executable is not None:
1115
self.set_executability(executable, trans_id)
1118
def new_directory(self, name, parent_id, file_id=None):
1119
"""Convenience method to create directories.
1121
name is the name of the directory to create.
1122
parent_id is the transaction id of the parent directory of the
1124
file_id is the inventory ID of the directory, if it is to be versioned.
1126
trans_id = self._new_entry(name, parent_id, file_id)
1127
self.create_directory(trans_id)
1130
def new_symlink(self, name, parent_id, target, file_id=None):
1131
"""Convenience method to create symbolic link.
1133
name is the name of the symlink to create.
1134
parent_id is the transaction id of the parent directory of the symlink.
1135
target is a bytestring of the target of the symlink.
1136
file_id is the inventory ID of the file, if it is to be versioned.
1138
trans_id = self._new_entry(name, parent_id, file_id)
1139
self.create_symlink(target, trans_id)
1142
def _affected_ids(self):
1143
"""Return the set of transform ids affected by the transform"""
1144
trans_ids = set(self._removed_id)
1145
trans_ids.update(self._new_id.keys())
1146
trans_ids.update(self._removed_contents)
1147
trans_ids.update(self._new_contents.keys())
1148
trans_ids.update(self._new_executability.keys())
1149
trans_ids.update(self._new_name.keys())
1150
trans_ids.update(self._new_parent.keys())
1153
def _get_file_id_maps(self):
1154
"""Return mapping of file_ids to trans_ids in the to and from states"""
1155
trans_ids = self._affected_ids()
1158
# Build up two dicts: trans_ids associated with file ids in the
1159
# FROM state, vs the TO state.
1160
for trans_id in trans_ids:
1161
from_file_id = self.tree_file_id(trans_id)
1162
if from_file_id is not None:
1163
from_trans_ids[from_file_id] = trans_id
1164
to_file_id = self.final_file_id(trans_id)
1165
if to_file_id is not None:
1166
to_trans_ids[to_file_id] = trans_id
1167
return from_trans_ids, to_trans_ids
1169
def _from_file_data(self, from_trans_id, from_versioned, file_id):
1170
"""Get data about a file in the from (tree) state
1172
Return a (name, parent, kind, executable) tuple
1174
from_path = self._tree_id_paths.get(from_trans_id)
1176
# get data from working tree if versioned
1177
from_entry = self._tree.inventory[file_id]
1178
from_name = from_entry.name
1179
from_parent = from_entry.parent_id
1182
if from_path is None:
1183
# File does not exist in FROM state
1187
# File exists, but is not versioned. Have to use path-
1189
from_name = os.path.basename(from_path)
1190
tree_parent = self.get_tree_parent(from_trans_id)
1191
from_parent = self.tree_file_id(tree_parent)
1192
if from_path is not None:
1193
from_kind, from_executable, from_stats = \
1194
self._tree._comparison_data(from_entry, from_path)
1197
from_executable = False
1198
return from_name, from_parent, from_kind, from_executable
1200
def _to_file_data(self, to_trans_id, from_trans_id, from_executable):
1201
"""Get data about a file in the to (target) state
1203
Return a (name, parent, kind, executable) tuple
1205
to_name = self.final_name(to_trans_id)
1207
to_kind = self.final_kind(to_trans_id)
1210
to_parent = self.final_file_id(self.final_parent(to_trans_id))
1211
if to_trans_id in self._new_executability:
1212
to_executable = self._new_executability[to_trans_id]
1213
elif to_trans_id == from_trans_id:
1214
to_executable = from_executable
1216
to_executable = False
1217
return to_name, to_parent, to_kind, to_executable
1219
def _iter_changes(self):
1220
"""Produce output in the same format as Tree._iter_changes.
1222
Will produce nonsensical results if invoked while inventory/filesystem
1223
conflicts (as reported by TreeTransform.find_conflicts()) are present.
1225
This reads the Transform, but only reproduces changes involving a
1226
file_id. Files that are not versioned in either of the FROM or TO
1227
states are not reflected.
1229
final_paths = FinalPaths(self)
1230
from_trans_ids, to_trans_ids = self._get_file_id_maps()
1232
# Now iterate through all active file_ids
1233
for file_id in set(from_trans_ids.keys() + to_trans_ids.keys()):
1235
from_trans_id = from_trans_ids.get(file_id)
1236
# find file ids, and determine versioning state
1237
if from_trans_id is None:
1238
from_versioned = False
1239
from_trans_id = to_trans_ids[file_id]
1241
from_versioned = True
1242
to_trans_id = to_trans_ids.get(file_id)
1243
if to_trans_id is None:
1244
to_versioned = False
1245
to_trans_id = from_trans_id
1249
from_name, from_parent, from_kind, from_executable = \
1250
self._from_file_data(from_trans_id, from_versioned, file_id)
1252
to_name, to_parent, to_kind, to_executable = \
1253
self._to_file_data(to_trans_id, from_trans_id, from_executable)
1255
if not from_versioned:
1258
from_path = self._tree_id_paths.get(from_trans_id)
1259
if not to_versioned:
1262
to_path = final_paths.get_path(to_trans_id)
1263
if from_kind != to_kind:
1265
elif to_kind in ('file', 'symlink') and (
1266
to_trans_id != from_trans_id or
1267
to_trans_id in self._new_contents):
1269
if (not modified and from_versioned == to_versioned and
1270
from_parent==to_parent and from_name == to_name and
1271
from_executable == to_executable):
1273
results.append((file_id, (from_path, to_path), modified,
1274
(from_versioned, to_versioned),
1275
(from_parent, to_parent),
1276
(from_name, to_name),
1277
(from_kind, to_kind),
1278
(from_executable, to_executable)))
1279
return iter(sorted(results, key=lambda x:x[1]))
1282
def joinpath(parent, child):
1283
"""Join tree-relative paths, handling the tree root specially"""
1284
if parent is None or parent == "":
1287
return pathjoin(parent, child)
1290
class FinalPaths(object):
1291
"""Make path calculation cheap by memoizing paths.
1293
The underlying tree must not be manipulated between calls, or else
1294
the results will likely be incorrect.
1296
def __init__(self, transform):
1297
object.__init__(self)
1298
self._known_paths = {}
1299
self.transform = transform
1301
def _determine_path(self, trans_id):
1302
if trans_id == self.transform.root:
1304
name = self.transform.final_name(trans_id)
1305
parent_id = self.transform.final_parent(trans_id)
1306
if parent_id == self.transform.root:
1309
return pathjoin(self.get_path(parent_id), name)
1311
def get_path(self, trans_id):
1312
"""Find the final path associated with a trans_id"""
1313
if trans_id not in self._known_paths:
1314
self._known_paths[trans_id] = self._determine_path(trans_id)
1315
return self._known_paths[trans_id]
1318
def topology_sorted_ids(tree):
1319
"""Determine the topological order of the ids in a tree"""
1320
file_ids = list(tree)
1321
file_ids.sort(key=tree.id2path)
1325
def build_tree(tree, wt, accelerator_tree=None):
1326
"""Create working tree for a branch, using a TreeTransform.
1328
This function should be used on empty trees, having a tree root at most.
1329
(see merge and revert functionality for working with existing trees)
1331
Existing files are handled like so:
1333
- Existing bzrdirs take precedence over creating new items. They are
1334
created as '%s.diverted' % name.
1335
- Otherwise, if the content on disk matches the content we are building,
1336
it is silently replaced.
1337
- Otherwise, conflict resolution will move the old file to 'oldname.moved'.
1339
wt.lock_tree_write()
1343
if accelerator_tree is not None:
1344
accelerator_tree.lock_read()
1346
return _build_tree(tree, wt, accelerator_tree)
1348
if accelerator_tree is not None:
1349
accelerator_tree.unlock()
1356
def _build_tree(tree, wt, accelerator_tree):
1357
"""See build_tree."""
1358
if len(wt.inventory) > 1: # more than just a root
1359
raise errors.WorkingTreeAlreadyPopulated(base=wt.basedir)
1361
top_pb = bzrlib.ui.ui_factory.nested_progress_bar()
1362
pp = ProgressPhase("Build phase", 2, top_pb)
1363
if tree.inventory.root is not None:
1364
# This is kind of a hack: we should be altering the root
1365
# as part of the regular tree shape diff logic.
1366
# The conditional test here is to avoid doing an
1367
# expensive operation (flush) every time the root id
1368
# is set within the tree, nor setting the root and thus
1369
# marking the tree as dirty, because we use two different
1370
# idioms here: tree interfaces and inventory interfaces.
1371
if wt.get_root_id() != tree.get_root_id():
1372
wt.set_root_id(tree.get_root_id())
1374
tt = TreeTransform(wt)
1378
file_trans_id[wt.get_root_id()] = \
1379
tt.trans_id_tree_file_id(wt.get_root_id())
1380
pb = bzrlib.ui.ui_factory.nested_progress_bar()
1382
deferred_contents = []
1383
for num, (tree_path, entry) in \
1384
enumerate(tree.inventory.iter_entries_by_dir()):
1385
pb.update("Building tree", num - len(deferred_contents),
1386
len(tree.inventory))
1387
if entry.parent_id is None:
1390
file_id = entry.file_id
1391
target_path = wt.abspath(tree_path)
1393
kind = file_kind(target_path)
1397
if kind == "directory":
1399
bzrdir.BzrDir.open(target_path)
1400
except errors.NotBranchError:
1404
if (file_id not in divert and
1405
_content_match(tree, entry, file_id, kind,
1407
tt.delete_contents(tt.trans_id_tree_path(tree_path))
1408
if kind == 'directory':
1410
if entry.parent_id not in file_trans_id:
1411
raise AssertionError(
1412
'entry %s parent id %r is not in file_trans_id %r'
1413
% (entry, entry.parent_id, file_trans_id))
1414
parent_id = file_trans_id[entry.parent_id]
1415
if entry.kind == 'file':
1416
# We *almost* replicate new_by_entry, so that we can defer
1417
# getting the file text, and get them all at once.
1418
trans_id = tt.create_path(entry.name, parent_id)
1419
file_trans_id[file_id] = trans_id
1420
tt.version_file(entry.file_id, trans_id)
1421
executable = tree.is_executable(entry.file_id, tree_path)
1422
if executable is not None:
1423
tt.set_executability(executable, trans_id)
1424
deferred_contents.append((entry.file_id, trans_id))
1426
file_trans_id[file_id] = new_by_entry(tt, entry, parent_id,
1429
new_trans_id = file_trans_id[file_id]
1430
old_parent = tt.trans_id_tree_path(tree_path)
1431
_reparent_children(tt, old_parent, new_trans_id)
1432
for num, (trans_id, bytes) in enumerate(
1433
_iter_files_bytes_accelerated(tree, accelerator_tree,
1434
deferred_contents)):
1435
tt.create_file(bytes, trans_id)
1436
pb.update('Adding file contents',
1437
(num + len(tree.inventory) - len(deferred_contents)),
1438
len(tree.inventory))
1442
divert_trans = set(file_trans_id[f] for f in divert)
1443
resolver = lambda t, c: resolve_checkout(t, c, divert_trans)
1444
raw_conflicts = resolve_conflicts(tt, pass_func=resolver)
1445
conflicts = cook_conflicts(raw_conflicts, tt)
1446
for conflict in conflicts:
1449
wt.add_conflicts(conflicts)
1450
except errors.UnsupportedOperation:
1452
result = tt.apply(no_conflicts=True)
1459
def _iter_files_bytes_accelerated(tree, accelerator_tree, desired_files):
1460
if accelerator_tree is None:
1461
new_desired_files = desired_files
1463
iter = accelerator_tree._iter_changes(tree, include_unchanged=True)
1464
unchanged = dict((f, p[0]) for (f, p, c, v, d, n, k, e)
1466
new_desired_files = []
1467
for file_id, identifier in desired_files:
1468
accelerator_path = unchanged.get(file_id)
1469
if accelerator_path is None:
1470
new_desired_files.append((file_id, identifier))
1472
contents = accelerator_tree.get_file(file_id, accelerator_path)
1475
contents_bytes = (contents.read(),)
1478
yield identifier, contents_bytes
1479
for result in tree.iter_files_bytes(new_desired_files):
1483
def _reparent_children(tt, old_parent, new_parent):
1484
for child in tt.iter_tree_children(old_parent):
1485
tt.adjust_path(tt.final_name(child), new_parent, child)
1488
def _content_match(tree, entry, file_id, kind, target_path):
1489
if entry.kind != kind:
1491
if entry.kind == "directory":
1493
if entry.kind == "file":
1494
if tree.get_file(file_id).read() == file(target_path, 'rb').read():
1496
elif entry.kind == "symlink":
1497
if tree.get_symlink_target(file_id) == os.readlink(target_path):
1502
def resolve_checkout(tt, conflicts, divert):
1503
new_conflicts = set()
1504
for c_type, conflict in ((c[0], c) for c in conflicts):
1505
# Anything but a 'duplicate' would indicate programmer error
1506
assert c_type == 'duplicate', c_type
1507
# Now figure out which is new and which is old
1508
if tt.new_contents(conflict[1]):
1509
new_file = conflict[1]
1510
old_file = conflict[2]
1512
new_file = conflict[2]
1513
old_file = conflict[1]
1515
# We should only get here if the conflict wasn't completely
1517
final_parent = tt.final_parent(old_file)
1518
if new_file in divert:
1519
new_name = tt.final_name(old_file)+'.diverted'
1520
tt.adjust_path(new_name, final_parent, new_file)
1521
new_conflicts.add((c_type, 'Diverted to',
1522
new_file, old_file))
1524
new_name = tt.final_name(old_file)+'.moved'
1525
tt.adjust_path(new_name, final_parent, old_file)
1526
new_conflicts.add((c_type, 'Moved existing file to',
1527
old_file, new_file))
1528
return new_conflicts
1531
def new_by_entry(tt, entry, parent_id, tree):
1532
"""Create a new file according to its inventory entry"""
1536
contents = tree.get_file(entry.file_id).readlines()
1537
executable = tree.is_executable(entry.file_id)
1538
return tt.new_file(name, parent_id, contents, entry.file_id,
1540
elif kind in ('directory', 'tree-reference'):
1541
trans_id = tt.new_directory(name, parent_id, entry.file_id)
1542
if kind == 'tree-reference':
1543
tt.set_tree_reference(entry.reference_revision, trans_id)
1545
elif kind == 'symlink':
1546
target = tree.get_symlink_target(entry.file_id)
1547
return tt.new_symlink(name, parent_id, target, entry.file_id)
1549
raise errors.BadFileKindError(name, kind)
1552
def create_by_entry(tt, entry, tree, trans_id, lines=None, mode_id=None):
1553
"""Create new file contents according to an inventory entry."""
1554
if entry.kind == "file":
1556
lines = tree.get_file(entry.file_id).readlines()
1557
tt.create_file(lines, trans_id, mode_id=mode_id)
1558
elif entry.kind == "symlink":
1559
tt.create_symlink(tree.get_symlink_target(entry.file_id), trans_id)
1560
elif entry.kind == "directory":
1561
tt.create_directory(trans_id)
1564
def create_entry_executability(tt, entry, trans_id):
1565
"""Set the executability of a trans_id according to an inventory entry"""
1566
if entry.kind == "file":
1567
tt.set_executability(entry.executable, trans_id)
1570
@deprecated_function(zero_fifteen)
1571
def find_interesting(working_tree, target_tree, filenames):
1572
"""Find the ids corresponding to specified filenames.
1574
Deprecated: Please use tree1.paths2ids(filenames, [tree2]).
1576
working_tree.lock_read()
1578
target_tree.lock_read()
1580
return working_tree.paths2ids(filenames, [target_tree])
1582
target_tree.unlock()
1584
working_tree.unlock()
1587
@deprecated_function(zero_ninety)
1588
def change_entry(tt, file_id, working_tree, target_tree,
1589
trans_id_file_id, backups, trans_id, by_parent):
1590
"""Replace a file_id's contents with those from a target tree."""
1591
if file_id is None and target_tree is None:
1592
# skip the logic altogether in the deprecation test
1594
e_trans_id = trans_id_file_id(file_id)
1595
entry = target_tree.inventory[file_id]
1596
has_contents, contents_mod, meta_mod, = _entry_changes(file_id, entry,
1599
mode_id = e_trans_id
1602
tt.delete_contents(e_trans_id)
1604
parent_trans_id = trans_id_file_id(entry.parent_id)
1605
backup_name = get_backup_name(entry, by_parent,
1606
parent_trans_id, tt)
1607
tt.adjust_path(backup_name, parent_trans_id, e_trans_id)
1608
tt.unversion_file(e_trans_id)
1609
e_trans_id = tt.create_path(entry.name, parent_trans_id)
1610
tt.version_file(file_id, e_trans_id)
1611
trans_id[file_id] = e_trans_id
1612
create_by_entry(tt, entry, target_tree, e_trans_id, mode_id=mode_id)
1613
create_entry_executability(tt, entry, e_trans_id)
1616
tt.set_executability(entry.executable, e_trans_id)
1617
if tt.final_name(e_trans_id) != entry.name:
1620
parent_id = tt.final_parent(e_trans_id)
1621
parent_file_id = tt.final_file_id(parent_id)
1622
if parent_file_id != entry.parent_id:
1627
parent_trans_id = trans_id_file_id(entry.parent_id)
1628
tt.adjust_path(entry.name, parent_trans_id, e_trans_id)
1631
def get_backup_name(entry, by_parent, parent_trans_id, tt):
1632
return _get_backup_name(entry.name, by_parent, parent_trans_id, tt)
1635
def _get_backup_name(name, by_parent, parent_trans_id, tt):
1636
"""Produce a backup-style name that appears to be available"""
1640
yield "%s.~%d~" % (name, counter)
1642
for new_name in name_gen():
1643
if not tt.has_named_child(by_parent, parent_trans_id, new_name):
1647
def _entry_changes(file_id, entry, working_tree):
1648
"""Determine in which ways the inventory entry has changed.
1650
Returns booleans: has_contents, content_mod, meta_mod
1651
has_contents means there are currently contents, but they differ
1652
contents_mod means contents need to be modified
1653
meta_mod means the metadata needs to be modified
1655
cur_entry = working_tree.inventory[file_id]
1657
working_kind = working_tree.kind(file_id)
1660
has_contents = False
1663
if has_contents is True:
1664
if entry.kind != working_kind:
1665
contents_mod, meta_mod = True, False
1667
cur_entry._read_tree_state(working_tree.id2path(file_id),
1669
contents_mod, meta_mod = entry.detect_changes(cur_entry)
1670
cur_entry._forget_tree_state()
1671
return has_contents, contents_mod, meta_mod
1674
def revert(working_tree, target_tree, filenames, backups=False,
1675
pb=DummyProgress(), change_reporter=None):
1676
"""Revert a working tree's contents to those of a target tree."""
1677
target_tree.lock_read()
1678
tt = TreeTransform(working_tree, pb)
1680
pp = ProgressPhase("Revert phase", 3, pb)
1682
child_pb = bzrlib.ui.ui_factory.nested_progress_bar()
1684
merge_modified = _alter_files(working_tree, target_tree, tt,
1685
child_pb, filenames, backups)
1689
child_pb = bzrlib.ui.ui_factory.nested_progress_bar()
1691
raw_conflicts = resolve_conflicts(tt, child_pb,
1692
lambda t, c: conflict_pass(t, c, target_tree))
1695
conflicts = cook_conflicts(raw_conflicts, tt)
1697
change_reporter = delta._ChangeReporter(
1698
unversioned_filter=working_tree.is_ignored)
1699
delta.report_changes(tt._iter_changes(), change_reporter)
1700
for conflict in conflicts:
1704
working_tree.set_merge_modified(merge_modified)
1706
target_tree.unlock()
1712
def _alter_files(working_tree, target_tree, tt, pb, specific_files,
1714
merge_modified = working_tree.merge_modified()
1715
change_list = target_tree._iter_changes(working_tree,
1716
specific_files=specific_files, pb=pb)
1717
if target_tree.inventory.root is None:
1724
for id_num, (file_id, path, changed_content, versioned, parent, name,
1725
kind, executable) in enumerate(change_list):
1726
if skip_root and file_id[0] is not None and parent[0] is None:
1728
trans_id = tt.trans_id_file_id(file_id)
1731
keep_content = False
1732
if kind[0] == 'file' and (backups or kind[1] is None):
1733
wt_sha1 = working_tree.get_file_sha1(file_id)
1734
if merge_modified.get(file_id) != wt_sha1:
1735
# acquire the basis tree lazily to prevent the
1736
# expense of accessing it when it's not needed ?
1737
# (Guessing, RBC, 200702)
1738
if basis_tree is None:
1739
basis_tree = working_tree.basis_tree()
1740
basis_tree.lock_read()
1741
if file_id in basis_tree:
1742
if wt_sha1 != basis_tree.get_file_sha1(file_id):
1744
elif kind[1] is None and not versioned[1]:
1746
if kind[0] is not None:
1747
if not keep_content:
1748
tt.delete_contents(trans_id)
1749
elif kind[1] is not None:
1750
parent_trans_id = tt.trans_id_file_id(parent[0])
1751
by_parent = tt.by_parent()
1752
backup_name = _get_backup_name(name[0], by_parent,
1753
parent_trans_id, tt)
1754
tt.adjust_path(backup_name, parent_trans_id, trans_id)
1755
new_trans_id = tt.create_path(name[0], parent_trans_id)
1756
if versioned == (True, True):
1757
tt.unversion_file(trans_id)
1758
tt.version_file(file_id, new_trans_id)
1759
# New contents should have the same unix perms as old
1762
trans_id = new_trans_id
1763
if kind[1] == 'directory':
1764
tt.create_directory(trans_id)
1765
elif kind[1] == 'symlink':
1766
tt.create_symlink(target_tree.get_symlink_target(file_id),
1768
elif kind[1] == 'file':
1769
deferred_files.append((file_id, (trans_id, mode_id)))
1770
if basis_tree is None:
1771
basis_tree = working_tree.basis_tree()
1772
basis_tree.lock_read()
1773
new_sha1 = target_tree.get_file_sha1(file_id)
1774
if (file_id in basis_tree and new_sha1 ==
1775
basis_tree.get_file_sha1(file_id)):
1776
if file_id in merge_modified:
1777
del merge_modified[file_id]
1779
merge_modified[file_id] = new_sha1
1781
# preserve the execute bit when backing up
1782
if keep_content and executable[0] == executable[1]:
1783
tt.set_executability(executable[1], trans_id)
1785
assert kind[1] is None
1786
if versioned == (False, True):
1787
tt.version_file(file_id, trans_id)
1788
if versioned == (True, False):
1789
tt.unversion_file(trans_id)
1790
if (name[1] is not None and
1791
(name[0] != name[1] or parent[0] != parent[1])):
1793
name[1], tt.trans_id_file_id(parent[1]), trans_id)
1794
if executable[0] != executable[1] and kind[1] == "file":
1795
tt.set_executability(executable[1], trans_id)
1796
for (trans_id, mode_id), bytes in target_tree.iter_files_bytes(
1798
tt.create_file(bytes, trans_id, mode_id)
1800
if basis_tree is not None:
1802
return merge_modified
1805
def resolve_conflicts(tt, pb=DummyProgress(), pass_func=None):
1806
"""Make many conflict-resolution attempts, but die if they fail"""
1807
if pass_func is None:
1808
pass_func = conflict_pass
1809
new_conflicts = set()
1812
pb.update('Resolution pass', n+1, 10)
1813
conflicts = tt.find_conflicts()
1814
if len(conflicts) == 0:
1815
return new_conflicts
1816
new_conflicts.update(pass_func(tt, conflicts))
1817
raise MalformedTransform(conflicts=conflicts)
1822
def conflict_pass(tt, conflicts, path_tree=None):
1823
"""Resolve some classes of conflicts.
1825
:param tt: The transform to resolve conflicts in
1826
:param conflicts: The conflicts to resolve
1827
:param path_tree: A Tree to get supplemental paths from
1829
new_conflicts = set()
1830
for c_type, conflict in ((c[0], c) for c in conflicts):
1831
if c_type == 'duplicate id':
1832
tt.unversion_file(conflict[1])
1833
new_conflicts.add((c_type, 'Unversioned existing file',
1834
conflict[1], conflict[2], ))
1835
elif c_type == 'duplicate':
1836
# files that were renamed take precedence
1837
final_parent = tt.final_parent(conflict[1])
1838
if tt.path_changed(conflict[1]):
1839
existing_file, new_file = conflict[2], conflict[1]
1841
existing_file, new_file = conflict[1], conflict[2]
1842
new_name = tt.final_name(existing_file)+'.moved'
1843
tt.adjust_path(new_name, final_parent, existing_file)
1844
new_conflicts.add((c_type, 'Moved existing file to',
1845
existing_file, new_file))
1846
elif c_type == 'parent loop':
1847
# break the loop by undoing one of the ops that caused the loop
1849
while not tt.path_changed(cur):
1850
cur = tt.final_parent(cur)
1851
new_conflicts.add((c_type, 'Cancelled move', cur,
1852
tt.final_parent(cur),))
1853
tt.adjust_path(tt.final_name(cur), tt.get_tree_parent(cur), cur)
1855
elif c_type == 'missing parent':
1856
trans_id = conflict[1]
1858
tt.cancel_deletion(trans_id)
1859
new_conflicts.add(('deleting parent', 'Not deleting',
1862
tt.create_directory(trans_id)
1863
new_conflicts.add((c_type, 'Created directory', trans_id))
1865
tt.final_name(trans_id)
1867
if path_tree is not None:
1868
file_id = tt.final_file_id(trans_id)
1869
entry = path_tree.inventory[file_id]
1870
parent_trans_id = tt.trans_id_file_id(entry.parent_id)
1871
tt.adjust_path(entry.name, parent_trans_id, trans_id)
1872
elif c_type == 'unversioned parent':
1873
tt.version_file(tt.inactive_file_id(conflict[1]), conflict[1])
1874
new_conflicts.add((c_type, 'Versioned directory', conflict[1]))
1875
return new_conflicts
1878
def cook_conflicts(raw_conflicts, tt):
1879
"""Generate a list of cooked conflicts, sorted by file path"""
1880
from bzrlib.conflicts import Conflict
1881
conflict_iter = iter_cook_conflicts(raw_conflicts, tt)
1882
return sorted(conflict_iter, key=Conflict.sort_key)
1885
def iter_cook_conflicts(raw_conflicts, tt):
1886
from bzrlib.conflicts import Conflict
1888
for conflict in raw_conflicts:
1889
c_type = conflict[0]
1890
action = conflict[1]
1891
modified_path = fp.get_path(conflict[2])
1892
modified_id = tt.final_file_id(conflict[2])
1893
if len(conflict) == 3:
1894
yield Conflict.factory(c_type, action=action, path=modified_path,
1895
file_id=modified_id)
1898
conflicting_path = fp.get_path(conflict[3])
1899
conflicting_id = tt.final_file_id(conflict[3])
1900
yield Conflict.factory(c_type, action=action, path=modified_path,
1901
file_id=modified_id,
1902
conflict_path=conflicting_path,
1903
conflict_file_id=conflicting_id)
1906
class _FileMover(object):
1907
"""Moves and deletes files for TreeTransform, tracking operations"""
1910
self.past_renames = []
1911
self.pending_deletions = []
1913
def rename(self, from_, to):
1914
"""Rename a file from one path to another. Functions like os.rename"""
1916
os.rename(from_, to)
1918
if e.errno in (errno.EEXIST, errno.ENOTEMPTY):
1919
raise errors.FileExists(to, str(e))
1921
self.past_renames.append((from_, to))
1923
def pre_delete(self, from_, to):
1924
"""Rename a file out of the way and mark it for deletion.
1926
Unlike os.unlink, this works equally well for files and directories.
1927
:param from_: The current file path
1928
:param to: A temporary path for the file
1930
self.rename(from_, to)
1931
self.pending_deletions.append(to)
1934
"""Reverse all renames that have been performed"""
1935
for from_, to in reversed(self.past_renames):
1936
os.rename(to, from_)
1937
# after rollback, don't reuse _FileMover
1939
pending_deletions = None
1941
def apply_deletions(self):
1942
"""Apply all marked deletions"""
1943
for path in self.pending_deletions:
1945
# after apply_deletions, don't reuse _FileMover
1947
pending_deletions = None
added
removed
bzrlib/transform.py
