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  • Committer: Martin Pool
  • Date: 2005-05-03 07:48:54 UTC
  • Revision ID: mbp@sourcefrog.net-20050503074854-adb6f9d6382e27a9
- sketchy experiments in bash and zsh completion

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1
 
# Copyright (C) 2006 Canonical Ltd
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.
7
 
 
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.
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
 
import os
18
 
import errno
19
 
from stat import S_ISREG
20
 
 
21
 
from bzrlib.errors import (DuplicateKey, MalformedTransform, NoSuchFile,
22
 
                           ReusingTransform, NotVersionedError, CantMoveRoot,
23
 
                           ExistingLimbo, ImmortalLimbo)
24
 
from bzrlib.inventory import InventoryEntry
25
 
from bzrlib.osutils import (file_kind, supports_executable, pathjoin, lexists,
26
 
                            delete_any)
27
 
from bzrlib.progress import DummyProgress, ProgressPhase
28
 
from bzrlib.trace import mutter, warning
29
 
import bzrlib.ui 
30
 
import bzrlib.urlutils as urlutils
31
 
 
32
 
 
33
 
ROOT_PARENT = "root-parent"
34
 
 
35
 
 
36
 
def unique_add(map, key, value):
37
 
    if key in map:
38
 
        raise DuplicateKey(key=key)
39
 
    map[key] = value
40
 
 
41
 
 
42
 
class _TransformResults(object):
43
 
    def __init__(self, modified_paths):
44
 
        object.__init__(self)
45
 
        self.modified_paths = modified_paths
46
 
 
47
 
 
48
 
class TreeTransform(object):
49
 
    """Represent a tree transformation.
50
 
    
51
 
    This object is designed to support incremental generation of the transform,
52
 
    in any order.  
53
 
    
54
 
    It is easy to produce malformed transforms, but they are generally
55
 
    harmless.  Attempting to apply a malformed transform will cause an
56
 
    exception to be raised before any modifications are made to the tree.  
57
 
 
58
 
    Many kinds of malformed transforms can be corrected with the 
59
 
    resolve_conflicts function.  The remaining ones indicate programming error,
60
 
    such as trying to create a file with no path.
61
 
 
62
 
    Two sets of file creation methods are supplied.  Convenience methods are:
63
 
     * new_file
64
 
     * new_directory
65
 
     * new_symlink
66
 
 
67
 
    These are composed of the low-level methods:
68
 
     * create_path
69
 
     * create_file or create_directory or create_symlink
70
 
     * version_file
71
 
     * set_executability
72
 
    """
73
 
    def __init__(self, tree, pb=DummyProgress()):
74
 
        """Note: a write lock is taken on the tree.
75
 
        
76
 
        Use TreeTransform.finalize() to release the lock
77
 
        """
78
 
        object.__init__(self)
79
 
        self._tree = tree
80
 
        self._tree.lock_write()
81
 
        try:
82
 
            control_files = self._tree._control_files
83
 
            self._limbodir = urlutils.local_path_from_url(
84
 
                control_files.controlfilename('limbo'))
85
 
            try:
86
 
                os.mkdir(self._limbodir)
87
 
            except OSError, e:
88
 
                if e.errno == errno.EEXIST:
89
 
                    raise ExistingLimbo(self._limbodir)
90
 
        except: 
91
 
            self._tree.unlock()
92
 
            raise
93
 
 
94
 
        self._id_number = 0
95
 
        self._new_name = {}
96
 
        self._new_parent = {}
97
 
        self._new_contents = {}
98
 
        self._removed_contents = set()
99
 
        self._new_executability = {}
100
 
        self._new_id = {}
101
 
        self._non_present_ids = {}
102
 
        self._r_new_id = {}
103
 
        self._removed_id = set()
104
 
        self._tree_path_ids = {}
105
 
        self._tree_id_paths = {}
106
 
        self._new_root = self.trans_id_tree_file_id(tree.get_root_id())
107
 
        self.__done = False
108
 
        self._pb = pb
109
 
 
110
 
    def __get_root(self):
111
 
        return self._new_root
112
 
 
113
 
    root = property(__get_root)
114
 
 
115
 
    def finalize(self):
116
 
        """Release the working tree lock, if held, clean up limbo dir."""
117
 
        if self._tree is None:
118
 
            return
119
 
        try:
120
 
            for trans_id, kind in self._new_contents.iteritems():
121
 
                path = self._limbo_name(trans_id)
122
 
                if kind == "directory":
123
 
                    os.rmdir(path)
124
 
                else:
125
 
                    os.unlink(path)
126
 
            try:
127
 
                os.rmdir(self._limbodir)
128
 
            except OSError:
129
 
                # We don't especially care *why* the dir is immortal.
130
 
                raise ImmortalLimbo(self._limbodir)
131
 
        finally:
132
 
            self._tree.unlock()
133
 
            self._tree = None
134
 
 
135
 
    def _assign_id(self):
136
 
        """Produce a new tranform id"""
137
 
        new_id = "new-%s" % self._id_number
138
 
        self._id_number +=1
139
 
        return new_id
140
 
 
141
 
    def create_path(self, name, parent):
142
 
        """Assign a transaction id to a new path"""
143
 
        trans_id = self._assign_id()
144
 
        unique_add(self._new_name, trans_id, name)
145
 
        unique_add(self._new_parent, trans_id, parent)
146
 
        return trans_id
147
 
 
148
 
    def adjust_path(self, name, parent, trans_id):
149
 
        """Change the path that is assigned to a transaction id."""
150
 
        if trans_id == self._new_root:
151
 
            raise CantMoveRoot
152
 
        self._new_name[trans_id] = name
153
 
        self._new_parent[trans_id] = parent
154
 
 
155
 
    def adjust_root_path(self, name, parent):
156
 
        """Emulate moving the root by moving all children, instead.
157
 
        
158
 
        We do this by undoing the association of root's transaction id with the
159
 
        current tree.  This allows us to create a new directory with that
160
 
        transaction id.  We unversion the root directory and version the 
161
 
        physically new directory, and hope someone versions the tree root
162
 
        later.
163
 
        """
164
 
        old_root = self._new_root
165
 
        old_root_file_id = self.final_file_id(old_root)
166
 
        # force moving all children of root
167
 
        for child_id in self.iter_tree_children(old_root):
168
 
            if child_id != parent:
169
 
                self.adjust_path(self.final_name(child_id), 
170
 
                                 self.final_parent(child_id), child_id)
171
 
            file_id = self.final_file_id(child_id)
172
 
            if file_id is not None:
173
 
                self.unversion_file(child_id)
174
 
            self.version_file(file_id, child_id)
175
 
        
176
 
        # the physical root needs a new transaction id
177
 
        self._tree_path_ids.pop("")
178
 
        self._tree_id_paths.pop(old_root)
179
 
        self._new_root = self.trans_id_tree_file_id(self._tree.get_root_id())
180
 
        if parent == old_root:
181
 
            parent = self._new_root
182
 
        self.adjust_path(name, parent, old_root)
183
 
        self.create_directory(old_root)
184
 
        self.version_file(old_root_file_id, old_root)
185
 
        self.unversion_file(self._new_root)
186
 
 
187
 
    def trans_id_tree_file_id(self, inventory_id):
188
 
        """Determine the transaction id of a working tree file.
189
 
        
190
 
        This reflects only files that already exist, not ones that will be
191
 
        added by transactions.
192
 
        """
193
 
        path = self._tree.inventory.id2path(inventory_id)
194
 
        return self.trans_id_tree_path(path)
195
 
 
196
 
    def trans_id_file_id(self, file_id):
197
 
        """Determine or set the transaction id associated with a file ID.
198
 
        A new id is only created for file_ids that were never present.  If
199
 
        a transaction has been unversioned, it is deliberately still returned.
200
 
        (this will likely lead to an unversioned parent conflict.)
201
 
        """
202
 
        if file_id in self._r_new_id and self._r_new_id[file_id] is not None:
203
 
            return self._r_new_id[file_id]
204
 
        elif file_id in self._tree.inventory:
205
 
            return self.trans_id_tree_file_id(file_id)
206
 
        elif file_id in self._non_present_ids:
207
 
            return self._non_present_ids[file_id]
208
 
        else:
209
 
            trans_id = self._assign_id()
210
 
            self._non_present_ids[file_id] = trans_id
211
 
            return trans_id
212
 
 
213
 
    def canonical_path(self, path):
214
 
        """Get the canonical tree-relative path"""
215
 
        # don't follow final symlinks
216
 
        dirname, basename = os.path.split(self._tree.abspath(path))
217
 
        dirname = os.path.realpath(dirname)
218
 
        return self._tree.relpath(pathjoin(dirname, basename))
219
 
 
220
 
    def trans_id_tree_path(self, path):
221
 
        """Determine (and maybe set) the transaction ID for a tree path."""
222
 
        path = self.canonical_path(path)
223
 
        if path not in self._tree_path_ids:
224
 
            self._tree_path_ids[path] = self._assign_id()
225
 
            self._tree_id_paths[self._tree_path_ids[path]] = path
226
 
        return self._tree_path_ids[path]
227
 
 
228
 
    def get_tree_parent(self, trans_id):
229
 
        """Determine id of the parent in the tree."""
230
 
        path = self._tree_id_paths[trans_id]
231
 
        if path == "":
232
 
            return ROOT_PARENT
233
 
        return self.trans_id_tree_path(os.path.dirname(path))
234
 
 
235
 
    def create_file(self, contents, trans_id, mode_id=None):
236
 
        """Schedule creation of a new file.
237
 
 
238
 
        See also new_file.
239
 
        
240
 
        Contents is an iterator of strings, all of which will be written
241
 
        to the target destination.
242
 
 
243
 
        New file takes the permissions of any existing file with that id,
244
 
        unless mode_id is specified.
245
 
        """
246
 
        f = file(self._limbo_name(trans_id), 'wb')
247
 
        unique_add(self._new_contents, trans_id, 'file')
248
 
        for segment in contents:
249
 
            f.write(segment)
250
 
        f.close()
251
 
        self._set_mode(trans_id, mode_id, S_ISREG)
252
 
 
253
 
    def _set_mode(self, trans_id, mode_id, typefunc):
254
 
        """Set the mode of new file contents.
255
 
        The mode_id is the existing file to get the mode from (often the same
256
 
        as trans_id).  The operation is only performed if there's a mode match
257
 
        according to typefunc.
258
 
        """
259
 
        if mode_id is None:
260
 
            mode_id = trans_id
261
 
        try:
262
 
            old_path = self._tree_id_paths[mode_id]
263
 
        except KeyError:
264
 
            return
265
 
        try:
266
 
            mode = os.stat(old_path).st_mode
267
 
        except OSError, e:
268
 
            if e.errno == errno.ENOENT:
269
 
                return
270
 
            else:
271
 
                raise
272
 
        if typefunc(mode):
273
 
            os.chmod(self._limbo_name(trans_id), mode)
274
 
 
275
 
    def create_directory(self, trans_id):
276
 
        """Schedule creation of a new directory.
277
 
        
278
 
        See also new_directory.
279
 
        """
280
 
        os.mkdir(self._limbo_name(trans_id))
281
 
        unique_add(self._new_contents, trans_id, 'directory')
282
 
 
283
 
    def create_symlink(self, target, trans_id):
284
 
        """Schedule creation of a new symbolic link.
285
 
 
286
 
        target is a bytestring.
287
 
        See also new_symlink.
288
 
        """
289
 
        os.symlink(target, self._limbo_name(trans_id))
290
 
        unique_add(self._new_contents, trans_id, 'symlink')
291
 
 
292
 
    def cancel_creation(self, trans_id):
293
 
        """Cancel the creation of new file contents."""
294
 
        del self._new_contents[trans_id]
295
 
        delete_any(self._limbo_name(trans_id))
296
 
 
297
 
    def delete_contents(self, trans_id):
298
 
        """Schedule the contents of a path entry for deletion"""
299
 
        self.tree_kind(trans_id)
300
 
        self._removed_contents.add(trans_id)
301
 
 
302
 
    def cancel_deletion(self, trans_id):
303
 
        """Cancel a scheduled deletion"""
304
 
        self._removed_contents.remove(trans_id)
305
 
 
306
 
    def unversion_file(self, trans_id):
307
 
        """Schedule a path entry to become unversioned"""
308
 
        self._removed_id.add(trans_id)
309
 
 
310
 
    def delete_versioned(self, trans_id):
311
 
        """Delete and unversion a versioned file"""
312
 
        self.delete_contents(trans_id)
313
 
        self.unversion_file(trans_id)
314
 
 
315
 
    def set_executability(self, executability, trans_id):
316
 
        """Schedule setting of the 'execute' bit
317
 
        To unschedule, set to None
318
 
        """
319
 
        if executability is None:
320
 
            del self._new_executability[trans_id]
321
 
        else:
322
 
            unique_add(self._new_executability, trans_id, executability)
323
 
 
324
 
    def version_file(self, file_id, trans_id):
325
 
        """Schedule a file to become versioned."""
326
 
        assert file_id is not None
327
 
        unique_add(self._new_id, trans_id, file_id)
328
 
        unique_add(self._r_new_id, file_id, trans_id)
329
 
 
330
 
    def cancel_versioning(self, trans_id):
331
 
        """Undo a previous versioning of a file"""
332
 
        file_id = self._new_id[trans_id]
333
 
        del self._new_id[trans_id]
334
 
        del self._r_new_id[file_id]
335
 
 
336
 
    def new_paths(self):
337
 
        """Determine the paths of all new and changed files"""
338
 
        new_ids = set()
339
 
        fp = FinalPaths(self)
340
 
        for id_set in (self._new_name, self._new_parent, self._new_contents,
341
 
                       self._new_id, self._new_executability):
342
 
            new_ids.update(id_set)
343
 
        new_paths = [(fp.get_path(t), t) for t in new_ids]
344
 
        new_paths.sort()
345
 
        return new_paths
346
 
 
347
 
    def tree_kind(self, trans_id):
348
 
        """Determine the file kind in the working tree.
349
 
 
350
 
        Raises NoSuchFile if the file does not exist
351
 
        """
352
 
        path = self._tree_id_paths.get(trans_id)
353
 
        if path is None:
354
 
            raise NoSuchFile(None)
355
 
        try:
356
 
            return file_kind(self._tree.abspath(path))
357
 
        except OSError, e:
358
 
            if e.errno != errno.ENOENT:
359
 
                raise
360
 
            else:
361
 
                raise NoSuchFile(path)
362
 
 
363
 
    def final_kind(self, trans_id):
364
 
        """Determine the final file kind, after any changes applied.
365
 
        
366
 
        Raises NoSuchFile if the file does not exist/has no contents.
367
 
        (It is conceivable that a path would be created without the
368
 
        corresponding contents insertion command)
369
 
        """
370
 
        if trans_id in self._new_contents:
371
 
            return self._new_contents[trans_id]
372
 
        elif trans_id in self._removed_contents:
373
 
            raise NoSuchFile(None)
374
 
        else:
375
 
            return self.tree_kind(trans_id)
376
 
 
377
 
    def tree_file_id(self, trans_id):
378
 
        """Determine the file id associated with the trans_id in the tree"""
379
 
        try:
380
 
            path = self._tree_id_paths[trans_id]
381
 
        except KeyError:
382
 
            # the file is a new, unversioned file, or invalid trans_id
383
 
            return None
384
 
        # the file is old; the old id is still valid
385
 
        if self._new_root == trans_id:
386
 
            return self._tree.inventory.root.file_id
387
 
        return self._tree.inventory.path2id(path)
388
 
 
389
 
    def final_file_id(self, trans_id):
390
 
        """Determine the file id after any changes are applied, or None.
391
 
        
392
 
        None indicates that the file will not be versioned after changes are
393
 
        applied.
394
 
        """
395
 
        try:
396
 
            # there is a new id for this file
397
 
            assert self._new_id[trans_id] is not None
398
 
            return self._new_id[trans_id]
399
 
        except KeyError:
400
 
            if trans_id in self._removed_id:
401
 
                return None
402
 
        return self.tree_file_id(trans_id)
403
 
 
404
 
    def inactive_file_id(self, trans_id):
405
 
        """Return the inactive file_id associated with a transaction id.
406
 
        That is, the one in the tree or in non_present_ids.
407
 
        The file_id may actually be active, too.
408
 
        """
409
 
        file_id = self.tree_file_id(trans_id)
410
 
        if file_id is not None:
411
 
            return file_id
412
 
        for key, value in self._non_present_ids.iteritems():
413
 
            if value == trans_id:
414
 
                return key
415
 
 
416
 
    def final_parent(self, trans_id):
417
 
        """Determine the parent file_id, after any changes are applied.
418
 
 
419
 
        ROOT_PARENT is returned for the tree root.
420
 
        """
421
 
        try:
422
 
            return self._new_parent[trans_id]
423
 
        except KeyError:
424
 
            return self.get_tree_parent(trans_id)
425
 
 
426
 
    def final_name(self, trans_id):
427
 
        """Determine the final filename, after all changes are applied."""
428
 
        try:
429
 
            return self._new_name[trans_id]
430
 
        except KeyError:
431
 
            return os.path.basename(self._tree_id_paths[trans_id])
432
 
 
433
 
    def by_parent(self):
434
 
        """Return a map of parent: children for known parents.
435
 
        
436
 
        Only new paths and parents of tree files with assigned ids are used.
437
 
        """
438
 
        by_parent = {}
439
 
        items = list(self._new_parent.iteritems())
440
 
        items.extend((t, self.final_parent(t)) for t in 
441
 
                      self._tree_id_paths.keys())
442
 
        for trans_id, parent_id in items:
443
 
            if parent_id not in by_parent:
444
 
                by_parent[parent_id] = set()
445
 
            by_parent[parent_id].add(trans_id)
446
 
        return by_parent
447
 
 
448
 
    def path_changed(self, trans_id):
449
 
        """Return True if a trans_id's path has changed."""
450
 
        return trans_id in self._new_name or trans_id in self._new_parent
451
 
 
452
 
    def find_conflicts(self):
453
 
        """Find any violations of inventory or filesystem invariants"""
454
 
        if self.__done is True:
455
 
            raise ReusingTransform()
456
 
        conflicts = []
457
 
        # ensure all children of all existent parents are known
458
 
        # all children of non-existent parents are known, by definition.
459
 
        self._add_tree_children()
460
 
        by_parent = self.by_parent()
461
 
        conflicts.extend(self._unversioned_parents(by_parent))
462
 
        conflicts.extend(self._parent_loops())
463
 
        conflicts.extend(self._duplicate_entries(by_parent))
464
 
        conflicts.extend(self._duplicate_ids())
465
 
        conflicts.extend(self._parent_type_conflicts(by_parent))
466
 
        conflicts.extend(self._improper_versioning())
467
 
        conflicts.extend(self._executability_conflicts())
468
 
        conflicts.extend(self._overwrite_conflicts())
469
 
        return conflicts
470
 
 
471
 
    def _add_tree_children(self):
472
 
        """Add all the children of all active parents to the known paths.
473
 
 
474
 
        Active parents are those which gain children, and those which are
475
 
        removed.  This is a necessary first step in detecting conflicts.
476
 
        """
477
 
        parents = self.by_parent().keys()
478
 
        parents.extend([t for t in self._removed_contents if 
479
 
                        self.tree_kind(t) == 'directory'])
480
 
        for trans_id in self._removed_id:
481
 
            file_id = self.tree_file_id(trans_id)
482
 
            if self._tree.inventory[file_id].kind in ('directory', 
483
 
                                                      'root_directory'):
484
 
                parents.append(trans_id)
485
 
 
486
 
        for parent_id in parents:
487
 
            # ensure that all children are registered with the transaction
488
 
            list(self.iter_tree_children(parent_id))
489
 
 
490
 
    def iter_tree_children(self, parent_id):
491
 
        """Iterate through the entry's tree children, if any"""
492
 
        try:
493
 
            path = self._tree_id_paths[parent_id]
494
 
        except KeyError:
495
 
            return
496
 
        try:
497
 
            children = os.listdir(self._tree.abspath(path))
498
 
        except OSError, e:
499
 
            if e.errno != errno.ENOENT and e.errno != errno.ESRCH:
500
 
                raise
501
 
            return
502
 
            
503
 
        for child in children:
504
 
            childpath = joinpath(path, child)
505
 
            if self._tree.is_control_filename(childpath):
506
 
                continue
507
 
            yield self.trans_id_tree_path(childpath)
508
 
 
509
 
    def has_named_child(self, by_parent, parent_id, name):
510
 
        try:
511
 
            children = by_parent[parent_id]
512
 
        except KeyError:
513
 
            children = []
514
 
        for child in children:
515
 
            if self.final_name(child) == name:
516
 
                return True
517
 
        try:
518
 
            path = self._tree_id_paths[parent_id]
519
 
        except KeyError:
520
 
            return False
521
 
        childpath = joinpath(path, name)
522
 
        child_id = self._tree_path_ids.get(childpath)
523
 
        if child_id is None:
524
 
            return lexists(self._tree.abspath(childpath))
525
 
        else:
526
 
            if tt.final_parent(child_id) != parent_id:
527
 
                return False
528
 
            if child_id in tt._removed_contents:
529
 
                # XXX What about dangling file-ids?
530
 
                return False
531
 
            else:
532
 
                return True
533
 
 
534
 
    def _parent_loops(self):
535
 
        """No entry should be its own ancestor"""
536
 
        conflicts = []
537
 
        for trans_id in self._new_parent:
538
 
            seen = set()
539
 
            parent_id = trans_id
540
 
            while parent_id is not ROOT_PARENT:
541
 
                seen.add(parent_id)
542
 
                parent_id = self.final_parent(parent_id)
543
 
                if parent_id == trans_id:
544
 
                    conflicts.append(('parent loop', trans_id))
545
 
                if parent_id in seen:
546
 
                    break
547
 
        return conflicts
548
 
 
549
 
    def _unversioned_parents(self, by_parent):
550
 
        """If parent directories are versioned, children must be versioned."""
551
 
        conflicts = []
552
 
        for parent_id, children in by_parent.iteritems():
553
 
            if parent_id is ROOT_PARENT:
554
 
                continue
555
 
            if self.final_file_id(parent_id) is not None:
556
 
                continue
557
 
            for child_id in children:
558
 
                if self.final_file_id(child_id) is not None:
559
 
                    conflicts.append(('unversioned parent', parent_id))
560
 
                    break;
561
 
        return conflicts
562
 
 
563
 
    def _improper_versioning(self):
564
 
        """Cannot version a file with no contents, or a bad type.
565
 
        
566
 
        However, existing entries with no contents are okay.
567
 
        """
568
 
        conflicts = []
569
 
        for trans_id in self._new_id.iterkeys():
570
 
            try:
571
 
                kind = self.final_kind(trans_id)
572
 
            except NoSuchFile:
573
 
                conflicts.append(('versioning no contents', trans_id))
574
 
                continue
575
 
            if not InventoryEntry.versionable_kind(kind):
576
 
                conflicts.append(('versioning bad kind', trans_id, kind))
577
 
        return conflicts
578
 
 
579
 
    def _executability_conflicts(self):
580
 
        """Check for bad executability changes.
581
 
        
582
 
        Only versioned files may have their executability set, because
583
 
        1. only versioned entries can have executability under windows
584
 
        2. only files can be executable.  (The execute bit on a directory
585
 
           does not indicate searchability)
586
 
        """
587
 
        conflicts = []
588
 
        for trans_id in self._new_executability:
589
 
            if self.final_file_id(trans_id) is None:
590
 
                conflicts.append(('unversioned executability', trans_id))
591
 
            else:
592
 
                try:
593
 
                    non_file = self.final_kind(trans_id) != "file"
594
 
                except NoSuchFile:
595
 
                    non_file = True
596
 
                if non_file is True:
597
 
                    conflicts.append(('non-file executability', trans_id))
598
 
        return conflicts
599
 
 
600
 
    def _overwrite_conflicts(self):
601
 
        """Check for overwrites (not permitted on Win32)"""
602
 
        conflicts = []
603
 
        for trans_id in self._new_contents:
604
 
            try:
605
 
                self.tree_kind(trans_id)
606
 
            except NoSuchFile:
607
 
                continue
608
 
            if trans_id not in self._removed_contents:
609
 
                conflicts.append(('overwrite', trans_id,
610
 
                                 self.final_name(trans_id)))
611
 
        return conflicts
612
 
 
613
 
    def _duplicate_entries(self, by_parent):
614
 
        """No directory may have two entries with the same name."""
615
 
        conflicts = []
616
 
        for children in by_parent.itervalues():
617
 
            name_ids = [(self.final_name(t), t) for t in children]
618
 
            name_ids.sort()
619
 
            last_name = None
620
 
            last_trans_id = None
621
 
            for name, trans_id in name_ids:
622
 
                if name == last_name:
623
 
                    conflicts.append(('duplicate', last_trans_id, trans_id,
624
 
                    name))
625
 
                try:
626
 
                    kind = self.final_kind(trans_id)
627
 
                except NoSuchFile:
628
 
                    kind = None
629
 
                file_id = self.final_file_id(trans_id)
630
 
                if kind is not None or file_id is not None:
631
 
                    last_name = name
632
 
                    last_trans_id = trans_id
633
 
        return conflicts
634
 
 
635
 
    def _duplicate_ids(self):
636
 
        """Each inventory id may only be used once"""
637
 
        conflicts = []
638
 
        removed_tree_ids = set((self.tree_file_id(trans_id) for trans_id in
639
 
                                self._removed_id))
640
 
        active_tree_ids = set((f for f in self._tree.inventory if
641
 
                               f not in removed_tree_ids))
642
 
        for trans_id, file_id in self._new_id.iteritems():
643
 
            if file_id in active_tree_ids:
644
 
                old_trans_id = self.trans_id_tree_file_id(file_id)
645
 
                conflicts.append(('duplicate id', old_trans_id, trans_id))
646
 
        return conflicts
647
 
 
648
 
    def _parent_type_conflicts(self, by_parent):
649
 
        """parents must have directory 'contents'."""
650
 
        conflicts = []
651
 
        for parent_id, children in by_parent.iteritems():
652
 
            if parent_id is ROOT_PARENT:
653
 
                continue
654
 
            if not self._any_contents(children):
655
 
                continue
656
 
            for child in children:
657
 
                try:
658
 
                    self.final_kind(child)
659
 
                except NoSuchFile:
660
 
                    continue
661
 
            try:
662
 
                kind = self.final_kind(parent_id)
663
 
            except NoSuchFile:
664
 
                kind = None
665
 
            if kind is None:
666
 
                conflicts.append(('missing parent', parent_id))
667
 
            elif kind != "directory":
668
 
                conflicts.append(('non-directory parent', parent_id))
669
 
        return conflicts
670
 
 
671
 
    def _any_contents(self, trans_ids):
672
 
        """Return true if any of the trans_ids, will have contents."""
673
 
        for trans_id in trans_ids:
674
 
            try:
675
 
                kind = self.final_kind(trans_id)
676
 
            except NoSuchFile:
677
 
                continue
678
 
            return True
679
 
        return False
680
 
            
681
 
    def apply(self):
682
 
        """Apply all changes to the inventory and filesystem.
683
 
        
684
 
        If filesystem or inventory conflicts are present, MalformedTransform
685
 
        will be thrown.
686
 
        """
687
 
        conflicts = self.find_conflicts()
688
 
        if len(conflicts) != 0:
689
 
            raise MalformedTransform(conflicts=conflicts)
690
 
        limbo_inv = {}
691
 
        inv = self._tree.inventory
692
 
        child_pb = bzrlib.ui.ui_factory.nested_progress_bar()
693
 
        try:
694
 
            child_pb.update('Apply phase', 0, 2)
695
 
            self._apply_removals(inv, limbo_inv)
696
 
            child_pb.update('Apply phase', 1, 2)
697
 
            modified_paths = self._apply_insertions(inv, limbo_inv)
698
 
        finally:
699
 
            child_pb.finished()
700
 
        self._tree._write_inventory(inv)
701
 
        self.__done = True
702
 
        self.finalize()
703
 
        return _TransformResults(modified_paths)
704
 
 
705
 
    def _limbo_name(self, trans_id):
706
 
        """Generate the limbo name of a file"""
707
 
        return pathjoin(self._limbodir, trans_id)
708
 
 
709
 
    def _apply_removals(self, inv, limbo_inv):
710
 
        """Perform tree operations that remove directory/inventory names.
711
 
        
712
 
        That is, delete files that are to be deleted, and put any files that
713
 
        need renaming into limbo.  This must be done in strict child-to-parent
714
 
        order.
715
 
        """
716
 
        tree_paths = list(self._tree_path_ids.iteritems())
717
 
        tree_paths.sort(reverse=True)
718
 
        child_pb = bzrlib.ui.ui_factory.nested_progress_bar()
719
 
        try:
720
 
            for num, data in enumerate(tree_paths):
721
 
                path, trans_id = data
722
 
                child_pb.update('removing file', num, len(tree_paths))
723
 
                full_path = self._tree.abspath(path)
724
 
                if trans_id in self._removed_contents:
725
 
                    delete_any(full_path)
726
 
                elif trans_id in self._new_name or trans_id in \
727
 
                    self._new_parent:
728
 
                    try:
729
 
                        os.rename(full_path, self._limbo_name(trans_id))
730
 
                    except OSError, e:
731
 
                        if e.errno != errno.ENOENT:
732
 
                            raise
733
 
                if trans_id in self._removed_id:
734
 
                    if trans_id == self._new_root:
735
 
                        file_id = self._tree.inventory.root.file_id
736
 
                    else:
737
 
                        file_id = self.tree_file_id(trans_id)
738
 
                    del inv[file_id]
739
 
                elif trans_id in self._new_name or trans_id in self._new_parent:
740
 
                    file_id = self.tree_file_id(trans_id)
741
 
                    if file_id is not None:
742
 
                        limbo_inv[trans_id] = inv[file_id]
743
 
                        del inv[file_id]
744
 
        finally:
745
 
            child_pb.finished()
746
 
 
747
 
    def _apply_insertions(self, inv, limbo_inv):
748
 
        """Perform tree operations that insert directory/inventory names.
749
 
        
750
 
        That is, create any files that need to be created, and restore from
751
 
        limbo any files that needed renaming.  This must be done in strict
752
 
        parent-to-child order.
753
 
        """
754
 
        new_paths = self.new_paths()
755
 
        modified_paths = []
756
 
        child_pb = bzrlib.ui.ui_factory.nested_progress_bar()
757
 
        try:
758
 
            for num, (path, trans_id) in enumerate(new_paths):
759
 
                child_pb.update('adding file', num, len(new_paths))
760
 
                try:
761
 
                    kind = self._new_contents[trans_id]
762
 
                except KeyError:
763
 
                    kind = contents = None
764
 
                if trans_id in self._new_contents or \
765
 
                    self.path_changed(trans_id):
766
 
                    full_path = self._tree.abspath(path)
767
 
                    try:
768
 
                        os.rename(self._limbo_name(trans_id), full_path)
769
 
                    except OSError, e:
770
 
                        # We may be renaming a dangling inventory id
771
 
                        if e.errno != errno.ENOENT:
772
 
                            raise
773
 
                    if trans_id in self._new_contents:
774
 
                        modified_paths.append(full_path)
775
 
                        del self._new_contents[trans_id]
776
 
 
777
 
                if trans_id in self._new_id:
778
 
                    if kind is None:
779
 
                        kind = file_kind(self._tree.abspath(path))
780
 
                    inv.add_path(path, kind, self._new_id[trans_id])
781
 
                elif trans_id in self._new_name or trans_id in\
782
 
                    self._new_parent:
783
 
                    entry = limbo_inv.get(trans_id)
784
 
                    if entry is not None:
785
 
                        entry.name = self.final_name(trans_id)
786
 
                        parent_path = os.path.dirname(path)
787
 
                        entry.parent_id = \
788
 
                            self._tree.inventory.path2id(parent_path)
789
 
                        inv.add(entry)
790
 
 
791
 
                # requires files and inventory entries to be in place
792
 
                if trans_id in self._new_executability:
793
 
                    self._set_executability(path, inv, trans_id)
794
 
        finally:
795
 
            child_pb.finished()
796
 
        return modified_paths
797
 
 
798
 
    def _set_executability(self, path, inv, trans_id):
799
 
        """Set the executability of versioned files """
800
 
        file_id = inv.path2id(path)
801
 
        new_executability = self._new_executability[trans_id]
802
 
        inv[file_id].executable = new_executability
803
 
        if supports_executable():
804
 
            abspath = self._tree.abspath(path)
805
 
            current_mode = os.stat(abspath).st_mode
806
 
            if new_executability:
807
 
                umask = os.umask(0)
808
 
                os.umask(umask)
809
 
                to_mode = current_mode | (0100 & ~umask)
810
 
                # Enable x-bit for others only if they can read it.
811
 
                if current_mode & 0004:
812
 
                    to_mode |= 0001 & ~umask
813
 
                if current_mode & 0040:
814
 
                    to_mode |= 0010 & ~umask
815
 
            else:
816
 
                to_mode = current_mode & ~0111
817
 
            os.chmod(abspath, to_mode)
818
 
 
819
 
    def _new_entry(self, name, parent_id, file_id):
820
 
        """Helper function to create a new filesystem entry."""
821
 
        trans_id = self.create_path(name, parent_id)
822
 
        if file_id is not None:
823
 
            self.version_file(file_id, trans_id)
824
 
        return trans_id
825
 
 
826
 
    def new_file(self, name, parent_id, contents, file_id=None, 
827
 
                 executable=None):
828
 
        """Convenience method to create files.
829
 
        
830
 
        name is the name of the file to create.
831
 
        parent_id is the transaction id of the parent directory of the file.
832
 
        contents is an iterator of bytestrings, which will be used to produce
833
 
        the file.
834
 
        file_id is the inventory ID of the file, if it is to be versioned.
835
 
        """
836
 
        trans_id = self._new_entry(name, parent_id, file_id)
837
 
        self.create_file(contents, trans_id)
838
 
        if executable is not None:
839
 
            self.set_executability(executable, trans_id)
840
 
        return trans_id
841
 
 
842
 
    def new_directory(self, name, parent_id, file_id=None):
843
 
        """Convenience method to create directories.
844
 
 
845
 
        name is the name of the directory to create.
846
 
        parent_id is the transaction id of the parent directory of the
847
 
        directory.
848
 
        file_id is the inventory ID of the directory, if it is to be versioned.
849
 
        """
850
 
        trans_id = self._new_entry(name, parent_id, file_id)
851
 
        self.create_directory(trans_id)
852
 
        return trans_id 
853
 
 
854
 
    def new_symlink(self, name, parent_id, target, file_id=None):
855
 
        """Convenience method to create symbolic link.
856
 
        
857
 
        name is the name of the symlink to create.
858
 
        parent_id is the transaction id of the parent directory of the symlink.
859
 
        target is a bytestring of the target of the symlink.
860
 
        file_id is the inventory ID of the file, if it is to be versioned.
861
 
        """
862
 
        trans_id = self._new_entry(name, parent_id, file_id)
863
 
        self.create_symlink(target, trans_id)
864
 
        return trans_id
865
 
 
866
 
def joinpath(parent, child):
867
 
    """Join tree-relative paths, handling the tree root specially"""
868
 
    if parent is None or parent == "":
869
 
        return child
870
 
    else:
871
 
        return pathjoin(parent, child)
872
 
 
873
 
 
874
 
class FinalPaths(object):
875
 
    """Make path calculation cheap by memoizing paths.
876
 
 
877
 
    The underlying tree must not be manipulated between calls, or else
878
 
    the results will likely be incorrect.
879
 
    """
880
 
    def __init__(self, transform):
881
 
        object.__init__(self)
882
 
        self._known_paths = {}
883
 
        self.transform = transform
884
 
 
885
 
    def _determine_path(self, trans_id):
886
 
        if trans_id == self.transform.root:
887
 
            return ""
888
 
        name = self.transform.final_name(trans_id)
889
 
        parent_id = self.transform.final_parent(trans_id)
890
 
        if parent_id == self.transform.root:
891
 
            return name
892
 
        else:
893
 
            return pathjoin(self.get_path(parent_id), name)
894
 
 
895
 
    def get_path(self, trans_id):
896
 
        """Find the final path associated with a trans_id"""
897
 
        if trans_id not in self._known_paths:
898
 
            self._known_paths[trans_id] = self._determine_path(trans_id)
899
 
        return self._known_paths[trans_id]
900
 
 
901
 
def topology_sorted_ids(tree):
902
 
    """Determine the topological order of the ids in a tree"""
903
 
    file_ids = list(tree)
904
 
    file_ids.sort(key=tree.id2path)
905
 
    return file_ids
906
 
 
907
 
def build_tree(tree, wt):
908
 
    """Create working tree for a branch, using a Transaction."""
909
 
    file_trans_id = {}
910
 
    top_pb = bzrlib.ui.ui_factory.nested_progress_bar()
911
 
    pp = ProgressPhase("Build phase", 2, top_pb)
912
 
    tt = TreeTransform(wt)
913
 
    try:
914
 
        pp.next_phase()
915
 
        file_trans_id[wt.get_root_id()] = tt.trans_id_tree_file_id(wt.get_root_id())
916
 
        file_ids = topology_sorted_ids(tree)
917
 
        pb = bzrlib.ui.ui_factory.nested_progress_bar()
918
 
        try:
919
 
            for num, file_id in enumerate(file_ids):
920
 
                pb.update("Building tree", num, len(file_ids))
921
 
                entry = tree.inventory[file_id]
922
 
                if entry.parent_id is None:
923
 
                    continue
924
 
                if entry.parent_id not in file_trans_id:
925
 
                    raise repr(entry.parent_id)
926
 
                parent_id = file_trans_id[entry.parent_id]
927
 
                file_trans_id[file_id] = new_by_entry(tt, entry, parent_id, 
928
 
                                                      tree)
929
 
        finally:
930
 
            pb.finished()
931
 
        pp.next_phase()
932
 
        tt.apply()
933
 
    finally:
934
 
        tt.finalize()
935
 
        top_pb.finished()
936
 
 
937
 
def new_by_entry(tt, entry, parent_id, tree):
938
 
    """Create a new file according to its inventory entry"""
939
 
    name = entry.name
940
 
    kind = entry.kind
941
 
    if kind == 'file':
942
 
        contents = tree.get_file(entry.file_id).readlines()
943
 
        executable = tree.is_executable(entry.file_id)
944
 
        return tt.new_file(name, parent_id, contents, entry.file_id, 
945
 
                           executable)
946
 
    elif kind == 'directory':
947
 
        return tt.new_directory(name, parent_id, entry.file_id)
948
 
    elif kind == 'symlink':
949
 
        target = tree.get_symlink_target(entry.file_id)
950
 
        return tt.new_symlink(name, parent_id, target, entry.file_id)
951
 
 
952
 
def create_by_entry(tt, entry, tree, trans_id, lines=None, mode_id=None):
953
 
    """Create new file contents according to an inventory entry."""
954
 
    if entry.kind == "file":
955
 
        if lines == None:
956
 
            lines = tree.get_file(entry.file_id).readlines()
957
 
        tt.create_file(lines, trans_id, mode_id=mode_id)
958
 
    elif entry.kind == "symlink":
959
 
        tt.create_symlink(tree.get_symlink_target(entry.file_id), trans_id)
960
 
    elif entry.kind == "directory":
961
 
        tt.create_directory(trans_id)
962
 
 
963
 
def create_entry_executability(tt, entry, trans_id):
964
 
    """Set the executability of a trans_id according to an inventory entry"""
965
 
    if entry.kind == "file":
966
 
        tt.set_executability(entry.executable, trans_id)
967
 
 
968
 
 
969
 
def find_interesting(working_tree, target_tree, filenames):
970
 
    """Find the ids corresponding to specified filenames."""
971
 
    if not filenames:
972
 
        interesting_ids = None
973
 
    else:
974
 
        interesting_ids = set()
975
 
        for tree_path in filenames:
976
 
            not_found = True
977
 
            for tree in (working_tree, target_tree):
978
 
                file_id = tree.inventory.path2id(tree_path)
979
 
                if file_id is not None:
980
 
                    interesting_ids.add(file_id)
981
 
                    not_found = False
982
 
            if not_found:
983
 
                raise NotVersionedError(path=tree_path)
984
 
    return interesting_ids
985
 
 
986
 
 
987
 
def change_entry(tt, file_id, working_tree, target_tree, 
988
 
                 trans_id_file_id, backups, trans_id, by_parent):
989
 
    """Replace a file_id's contents with those from a target tree."""
990
 
    e_trans_id = trans_id_file_id(file_id)
991
 
    entry = target_tree.inventory[file_id]
992
 
    has_contents, contents_mod, meta_mod, = _entry_changes(file_id, entry, 
993
 
                                                           working_tree)
994
 
    if contents_mod:
995
 
        mode_id = e_trans_id
996
 
        if has_contents:
997
 
            if not backups:
998
 
                tt.delete_contents(e_trans_id)
999
 
            else:
1000
 
                parent_trans_id = trans_id_file_id(entry.parent_id)
1001
 
                backup_name = get_backup_name(entry, by_parent,
1002
 
                                              parent_trans_id, tt)
1003
 
                tt.adjust_path(backup_name, parent_trans_id, e_trans_id)
1004
 
                tt.unversion_file(e_trans_id)
1005
 
                e_trans_id = tt.create_path(entry.name, parent_trans_id)
1006
 
                tt.version_file(file_id, e_trans_id)
1007
 
                trans_id[file_id] = e_trans_id
1008
 
        create_by_entry(tt, entry, target_tree, e_trans_id, mode_id=mode_id)
1009
 
        create_entry_executability(tt, entry, e_trans_id)
1010
 
 
1011
 
    elif meta_mod:
1012
 
        tt.set_executability(entry.executable, e_trans_id)
1013
 
    if tt.final_name(e_trans_id) != entry.name:
1014
 
        adjust_path  = True
1015
 
    else:
1016
 
        parent_id = tt.final_parent(e_trans_id)
1017
 
        parent_file_id = tt.final_file_id(parent_id)
1018
 
        if parent_file_id != entry.parent_id:
1019
 
            adjust_path = True
1020
 
        else:
1021
 
            adjust_path = False
1022
 
    if adjust_path:
1023
 
        parent_trans_id = trans_id_file_id(entry.parent_id)
1024
 
        tt.adjust_path(entry.name, parent_trans_id, e_trans_id)
1025
 
 
1026
 
 
1027
 
def get_backup_name(entry, by_parent, parent_trans_id, tt):
1028
 
    """Produce a backup-style name that appears to be available"""
1029
 
    def name_gen():
1030
 
        counter = 1
1031
 
        while True:
1032
 
            yield "%s.~%d~" % (entry.name, counter)
1033
 
            counter += 1
1034
 
    for name in name_gen():
1035
 
        if not tt.has_named_child(by_parent, parent_trans_id, name):
1036
 
            return name
1037
 
 
1038
 
def _entry_changes(file_id, entry, working_tree):
1039
 
    """Determine in which ways the inventory entry has changed.
1040
 
 
1041
 
    Returns booleans: has_contents, content_mod, meta_mod
1042
 
    has_contents means there are currently contents, but they differ
1043
 
    contents_mod means contents need to be modified
1044
 
    meta_mod means the metadata needs to be modified
1045
 
    """
1046
 
    cur_entry = working_tree.inventory[file_id]
1047
 
    try:
1048
 
        working_kind = working_tree.kind(file_id)
1049
 
        has_contents = True
1050
 
    except OSError, e:
1051
 
        if e.errno != errno.ENOENT:
1052
 
            raise
1053
 
        has_contents = False
1054
 
        contents_mod = True
1055
 
        meta_mod = False
1056
 
    if has_contents is True:
1057
 
        real_e_kind = entry.kind
1058
 
        if real_e_kind == 'root_directory':
1059
 
            real_e_kind = 'directory'
1060
 
        if real_e_kind != working_kind:
1061
 
            contents_mod, meta_mod = True, False
1062
 
        else:
1063
 
            cur_entry._read_tree_state(working_tree.id2path(file_id), 
1064
 
                                       working_tree)
1065
 
            contents_mod, meta_mod = entry.detect_changes(cur_entry)
1066
 
            cur_entry._forget_tree_state()
1067
 
    return has_contents, contents_mod, meta_mod
1068
 
 
1069
 
 
1070
 
def revert(working_tree, target_tree, filenames, backups=False, 
1071
 
           pb=DummyProgress()):
1072
 
    """Revert a working tree's contents to those of a target tree."""
1073
 
    interesting_ids = find_interesting(working_tree, target_tree, filenames)
1074
 
    def interesting(file_id):
1075
 
        return interesting_ids is None or file_id in interesting_ids
1076
 
 
1077
 
    tt = TreeTransform(working_tree, pb)
1078
 
    try:
1079
 
        merge_modified = working_tree.merge_modified()
1080
 
        trans_id = {}
1081
 
        def trans_id_file_id(file_id):
1082
 
            try:
1083
 
                return trans_id[file_id]
1084
 
            except KeyError:
1085
 
                return tt.trans_id_tree_file_id(file_id)
1086
 
 
1087
 
        pp = ProgressPhase("Revert phase", 4, pb)
1088
 
        pp.next_phase()
1089
 
        sorted_interesting = [i for i in topology_sorted_ids(target_tree) if
1090
 
                              interesting(i)]
1091
 
        child_pb = bzrlib.ui.ui_factory.nested_progress_bar()
1092
 
        try:
1093
 
            by_parent = tt.by_parent()
1094
 
            for id_num, file_id in enumerate(sorted_interesting):
1095
 
                child_pb.update("Reverting file", id_num+1, 
1096
 
                                len(sorted_interesting))
1097
 
                if file_id not in working_tree.inventory:
1098
 
                    entry = target_tree.inventory[file_id]
1099
 
                    parent_id = trans_id_file_id(entry.parent_id)
1100
 
                    e_trans_id = new_by_entry(tt, entry, parent_id, target_tree)
1101
 
                    trans_id[file_id] = e_trans_id
1102
 
                else:
1103
 
                    backup_this = backups
1104
 
                    if file_id in merge_modified:
1105
 
                        backup_this = False
1106
 
                        del merge_modified[file_id]
1107
 
                    change_entry(tt, file_id, working_tree, target_tree, 
1108
 
                                 trans_id_file_id, backup_this, trans_id,
1109
 
                                 by_parent)
1110
 
        finally:
1111
 
            child_pb.finished()
1112
 
        pp.next_phase()
1113
 
        wt_interesting = [i for i in working_tree.inventory if interesting(i)]
1114
 
        child_pb = bzrlib.ui.ui_factory.nested_progress_bar()
1115
 
        try:
1116
 
            for id_num, file_id in enumerate(wt_interesting):
1117
 
                child_pb.update("New file check", id_num+1, 
1118
 
                                len(sorted_interesting))
1119
 
                if file_id not in target_tree:
1120
 
                    trans_id = tt.trans_id_tree_file_id(file_id)
1121
 
                    tt.unversion_file(trans_id)
1122
 
                    if file_id in merge_modified:
1123
 
                        tt.delete_contents(trans_id)
1124
 
                        del merge_modified[file_id]
1125
 
        finally:
1126
 
            child_pb.finished()
1127
 
        pp.next_phase()
1128
 
        child_pb = bzrlib.ui.ui_factory.nested_progress_bar()
1129
 
        try:
1130
 
            raw_conflicts = resolve_conflicts(tt, child_pb)
1131
 
        finally:
1132
 
            child_pb.finished()
1133
 
        conflicts = cook_conflicts(raw_conflicts, tt)
1134
 
        for conflict in conflicts:
1135
 
            warning(conflict)
1136
 
        pp.next_phase()
1137
 
        tt.apply()
1138
 
        working_tree.set_merge_modified({})
1139
 
    finally:
1140
 
        tt.finalize()
1141
 
        pb.clear()
1142
 
    return conflicts
1143
 
 
1144
 
 
1145
 
def resolve_conflicts(tt, pb=DummyProgress()):
1146
 
    """Make many conflict-resolution attempts, but die if they fail"""
1147
 
    new_conflicts = set()
1148
 
    try:
1149
 
        for n in range(10):
1150
 
            pb.update('Resolution pass', n+1, 10)
1151
 
            conflicts = tt.find_conflicts()
1152
 
            if len(conflicts) == 0:
1153
 
                return new_conflicts
1154
 
            new_conflicts.update(conflict_pass(tt, conflicts))
1155
 
        raise MalformedTransform(conflicts=conflicts)
1156
 
    finally:
1157
 
        pb.clear()
1158
 
 
1159
 
 
1160
 
def conflict_pass(tt, conflicts):
1161
 
    """Resolve some classes of conflicts."""
1162
 
    new_conflicts = set()
1163
 
    for c_type, conflict in ((c[0], c) for c in conflicts):
1164
 
        if c_type == 'duplicate id':
1165
 
            tt.unversion_file(conflict[1])
1166
 
            new_conflicts.add((c_type, 'Unversioned existing file',
1167
 
                               conflict[1], conflict[2], ))
1168
 
        elif c_type == 'duplicate':
1169
 
            # files that were renamed take precedence
1170
 
            new_name = tt.final_name(conflict[1])+'.moved'
1171
 
            final_parent = tt.final_parent(conflict[1])
1172
 
            if tt.path_changed(conflict[1]):
1173
 
                tt.adjust_path(new_name, final_parent, conflict[2])
1174
 
                new_conflicts.add((c_type, 'Moved existing file to', 
1175
 
                                   conflict[2], conflict[1]))
1176
 
            else:
1177
 
                tt.adjust_path(new_name, final_parent, conflict[1])
1178
 
                new_conflicts.add((c_type, 'Moved existing file to', 
1179
 
                                  conflict[1], conflict[2]))
1180
 
        elif c_type == 'parent loop':
1181
 
            # break the loop by undoing one of the ops that caused the loop
1182
 
            cur = conflict[1]
1183
 
            while not tt.path_changed(cur):
1184
 
                cur = tt.final_parent(cur)
1185
 
            new_conflicts.add((c_type, 'Cancelled move', cur,
1186
 
                               tt.final_parent(cur),))
1187
 
            tt.adjust_path(tt.final_name(cur), tt.get_tree_parent(cur), cur)
1188
 
            
1189
 
        elif c_type == 'missing parent':
1190
 
            trans_id = conflict[1]
1191
 
            try:
1192
 
                tt.cancel_deletion(trans_id)
1193
 
                new_conflicts.add((c_type, 'Not deleting', trans_id))
1194
 
            except KeyError:
1195
 
                tt.create_directory(trans_id)
1196
 
                new_conflicts.add((c_type, 'Created directory.', trans_id))
1197
 
        elif c_type == 'unversioned parent':
1198
 
            tt.version_file(tt.inactive_file_id(conflict[1]), conflict[1])
1199
 
            new_conflicts.add((c_type, 'Versioned directory', conflict[1]))
1200
 
    return new_conflicts
1201
 
 
1202
 
 
1203
 
def cook_conflicts(raw_conflicts, tt):
1204
 
    """Generate a list of cooked conflicts, sorted by file path"""
1205
 
    from bzrlib.conflicts import Conflict
1206
 
    conflict_iter = iter_cook_conflicts(raw_conflicts, tt)
1207
 
    return sorted(conflict_iter, key=Conflict.sort_key)
1208
 
 
1209
 
 
1210
 
def iter_cook_conflicts(raw_conflicts, tt):
1211
 
    from bzrlib.conflicts import Conflict
1212
 
    fp = FinalPaths(tt)
1213
 
    for conflict in raw_conflicts:
1214
 
        c_type = conflict[0]
1215
 
        action = conflict[1]
1216
 
        modified_path = fp.get_path(conflict[2])
1217
 
        modified_id = tt.final_file_id(conflict[2])
1218
 
        if len(conflict) == 3:
1219
 
            yield Conflict.factory(c_type, action=action, path=modified_path,
1220
 
                                     file_id=modified_id)
1221
 
             
1222
 
        else:
1223
 
            conflicting_path = fp.get_path(conflict[3])
1224
 
            conflicting_id = tt.final_file_id(conflict[3])
1225
 
            yield Conflict.factory(c_type, action=action, path=modified_path,
1226
 
                                   file_id=modified_id, 
1227
 
                                   conflict_path=conflicting_path,
1228
 
                                   conflict_file_id=conflicting_id)