~bzr-pqm/bzr/bzr.dev

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
# Copyright (C) 2005, 2006 Canonical

# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.

# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.

# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

"""Exceptions for bzr, and reporting of them.

Exceptions are caught at a high level to report errors to the user, and
might also be caught inside the program.  Therefore it needs to be
possible to convert them to a meaningful string, and also for them to be
interrogated by the program.

Exceptions are defined such that the arguments given to the constructor
are stored in the object as properties of the same name.  When the
object is printed as a string, the doc string of the class is used as
a format string with the property dictionary available to it.

This means that exceptions can used like this:

>>> import sys
>>> try:
...   raise NotBranchError(path='/foo/bar')
... except:
...   print sys.exc_type
...   print sys.exc_value
...   path = getattr(sys.exc_value, 'path')
...   if path is not None:
...     print path
bzrlib.errors.NotBranchError
Not a branch: /foo/bar
/foo/bar

Therefore:

 * create a new exception class for any class of error that can be
   usefully distinguished.

 * the printable form of an exception is generated by the base class
   __str__ method

Exception strings should start with a capital letter and not have a final
fullstop.
"""

from warnings import warn

# based on Scott James Remnant's hct error classes

# TODO: is there any value in providing the .args field used by standard
# python exceptions?   A list of values with no names seems less useful 
# to me.

# TODO: Perhaps convert the exception to a string at the moment it's 
# constructed to make sure it will succeed.  But that says nothing about
# exceptions that are never raised.

# TODO: Convert all the other error classes here to BzrNewError, and eliminate
# the old one.

# TODO: The pattern (from hct) of using classes docstrings as message
# templates is cute but maybe not such a great idea - perhaps should have a
# separate static message_template.


class BzrError(StandardError):
    def __str__(self):
        # XXX: Should we show the exception class in 
        # exceptions that don't provide their own message?  
        # maybe it should be done at a higher level
        ## n = self.__class__.__name__ + ': '
        n = ''
        if len(self.args) == 1:
            return str(self.args[0])
        elif len(self.args) == 2:
            # further explanation or suggestions
            try:
                return n + '\n  '.join([self.args[0]] + self.args[1])
            except TypeError:
                return n + "%r" % self
        else:
            return n + `self.args`


class BzrNewError(BzrError):
    """bzr error"""
    # base classes should override the docstring with their human-
    # readable explanation

    def __init__(self, **kwds):
        for key, value in kwds.items():
            setattr(self, key, value)

    def __str__(self):
        try:
            return self.__doc__ % self.__dict__
        except (NameError, ValueError, KeyError), e:
            return 'Unprintable exception %s: %s' \
                % (self.__class__.__name__, str(e))


class BzrCheckError(BzrNewError):
    """Internal check failed: %(message)s"""

    def __init__(self, message):
        BzrNewError.__init__(self)
        self.message = message


class InvalidEntryName(BzrNewError):
    """Invalid entry name: %(name)s"""
    def __init__(self, name):
        BzrNewError.__init__(self)
        self.name = name


class InvalidRevisionNumber(BzrNewError):
    """Invalid revision number %(revno)d"""
    def __init__(self, revno):
        BzrNewError.__init__(self)
        self.revno = revno


class InvalidRevisionId(BzrNewError):
    """Invalid revision-id {%(revision_id)s} in %(branch)s"""
    def __init__(self, revision_id, branch):
        # branch can be any string or object with __str__ defined
        BzrNewError.__init__(self)
        self.revision_id = revision_id
        self.branch = branch


class NoWorkingTree(BzrNewError):
    """No WorkingTree exists for %(base)s."""
    
    def __init__(self, base):
        BzrNewError.__init__(self)
        self.base = base


class NotLocalUrl(BzrNewError):
    """%(url)s is not a local path."""
    
    def __init__(self, url):
        BzrNewError.__init__(self)
        self.url = url


class BzrCommandError(BzrError):
    # Error from malformed user command
    # This is being misused as a generic exception
    # pleae subclass. RBC 20051030
    #
    # I think it's a waste of effort to differentiate between errors that
    # are not intended to be caught anyway.  UI code need not subclass
    # BzrCommandError, and non-UI code should not throw a subclass of
    # BzrCommandError.  ADHB 20051211
    def __str__(self):
        return self.args[0]


class BzrOptionError(BzrCommandError):
    """Some missing or otherwise incorrect option was supplied."""

    
class StrictCommitFailed(Exception):
    """Commit refused because there are unknowns in the tree."""


# XXX: Should be unified with TransportError; they seem to represent the
# same thing
class PathError(BzrNewError):
    """Generic path error: %(path)r%(extra)s)"""

    def __init__(self, path, extra=None):
        BzrNewError.__init__(self)
        self.path = path
        if extra:
            self.extra = ': ' + str(extra)
        else:
            self.extra = ''


class NoSuchFile(PathError):
    """No such file: %(path)r%(extra)s"""


class FileExists(PathError):
    """File exists: %(path)r%(extra)s"""


class DirectoryNotEmpty(PathError):
    """Directory not empty: %(path)r%(extra)s"""


class ResourceBusy(PathError):
    """Device or resource busy: %(path)r%(extra)s"""


class PermissionDenied(PathError):
    """Permission denied: %(path)r%(extra)s"""


class PathNotChild(BzrNewError):
    """Path %(path)r is not a child of path %(base)r%(extra)s"""
    def __init__(self, path, base, extra=None):
        BzrNewError.__init__(self)
        self.path = path
        self.base = base
        if extra:
            self.extra = ': ' + str(extra)
        else:
            self.extra = ''


class NotBranchError(PathError):
    """Not a branch: %(path)s"""


class AlreadyBranchError(PathError):
    """Already a branch: %(path)s."""


class BranchExistsWithoutWorkingTree(PathError):
    """Directory contains a branch, but no working tree \
(use bzr checkout if you wish to build a working tree): %(path)s"""


class NoRepositoryPresent(BzrNewError):
    """No repository present: %(path)r"""
    def __init__(self, bzrdir):
        BzrNewError.__init__(self)
        self.path = bzrdir.transport.clone('..').base


class FileInWrongBranch(BzrNewError):
    """File %(path)s in not in branch %(branch_base)s."""

    def __init__(self, branch, path):
        BzrNewError.__init__(self)
        self.branch = branch
        self.branch_base = branch.base
        self.path = path


class UnsupportedFormatError(BzrError):
    """Specified path is a bzr branch that we recognize but cannot read."""
    def __str__(self):
        return 'unsupported branch format: %s' % self.args[0]


class UnknownFormatError(BzrError):
    """Specified path is a bzr branch whose format we do not recognize."""
    def __str__(self):
        return 'unknown branch format: %s' % self.args[0]


class IncompatibleFormat(BzrNewError):
    """Format %(format)s is not compatible with .bzr version %(bzrdir)s."""

    def __init__(self, format, bzrdir_format):
        BzrNewError.__init__(self)
        self.format = format
        self.bzrdir = bzrdir_format


class NotVersionedError(BzrNewError):
    """%(path)s is not versioned"""
    def __init__(self, path):
        BzrNewError.__init__(self)
        self.path = path


class PathsNotVersionedError(BzrNewError):
    # used when reporting several paths are not versioned
    """Path(s) are not versioned: %(paths_as_string)s"""

    def __init__(self, paths):
        from bzrlib.osutils import quotefn
        BzrNewError.__init__(self)
        self.paths = paths
        self.paths_as_string = ' '.join([quotefn(p) for p in paths])


class PathsDoNotExist(BzrNewError):
    """Path(s) do not exist: %(paths_as_string)s"""

    # used when reporting that paths are neither versioned nor in the working
    # tree

    def __init__(self, paths):
        # circular import
        from bzrlib.osutils import quotefn
        BzrNewError.__init__(self)
        self.paths = paths
        self.paths_as_string = ' '.join([quotefn(p) for p in paths])


class BadFileKindError(BzrError):
    """Specified file is of a kind that cannot be added.

    (For example a symlink or device file.)"""


class ForbiddenFileError(BzrError):
    """Cannot operate on a file because it is a control file."""


class LockError(BzrNewError):
    """Lock error: %(message)s"""
    # All exceptions from the lock/unlock functions should be from
    # this exception class.  They will be translated as necessary. The
    # original exception is available as e.original_error
    #
    # New code should prefer to raise specific subclasses
    def __init__(self, message):
        self.message = message


class CommitNotPossible(LockError):
    """A commit was attempted but we do not have a write lock open."""
    def __init__(self):
        pass


class AlreadyCommitted(LockError):
    """A rollback was requested, but is not able to be accomplished."""
    def __init__(self):
        pass


class ReadOnlyError(LockError):
    """A write attempt was made in a read only transaction on %(obj)s"""
    def __init__(self, obj):
        self.obj = obj


class OutSideTransaction(BzrNewError):
    """A transaction related operation was attempted after the transaction finished."""


class ObjectNotLocked(LockError):
    """%(obj)r is not locked"""
    # this can indicate that any particular object is not locked; see also
    # LockNotHeld which means that a particular *lock* object is not held by
    # the caller -- perhaps they should be unified.
    def __init__(self, obj):
        self.obj = obj


class ReadOnlyObjectDirtiedError(ReadOnlyError):
    """Cannot change object %(obj)r in read only transaction"""
    def __init__(self, obj):
        self.obj = obj


class UnlockableTransport(LockError):
    """Cannot lock: transport is read only: %(transport)s"""
    def __init__(self, transport):
        self.transport = transport


class LockContention(LockError):
    """Could not acquire lock %(lock)s"""
    # TODO: show full url for lock, combining the transport and relative bits?
    def __init__(self, lock):
        self.lock = lock


class LockBroken(LockError):
    """Lock was broken while still open: %(lock)s - check storage consistency!"""
    def __init__(self, lock):
        self.lock = lock


class LockBreakMismatch(LockError):
    """Lock was released and re-acquired before being broken: %(lock)s: held by %(holder)r, wanted to break %(target)r"""
    def __init__(self, lock, holder, target):
        self.lock = lock
        self.holder = holder
        self.target = target


class LockNotHeld(LockError):
    """Lock not held: %(lock)s"""
    def __init__(self, lock):
        self.lock = lock


class PointlessCommit(BzrNewError):
    """No changes to commit"""


class UpgradeReadonly(BzrNewError):
    """Upgrade URL cannot work with readonly URL's."""


class UpToDateFormat(BzrNewError):
    """The branch format %(format)s is already at the most recent format."""

    def __init__(self, format):
        BzrNewError.__init__(self)
        self.format = format



class StrictCommitFailed(Exception):
    """Commit refused because there are unknowns in the tree."""


class NoSuchRevision(BzrError):
    def __init__(self, branch, revision):
        self.branch = branch
        self.revision = revision
        msg = "Branch %s has no revision %s" % (branch, revision)
        BzrError.__init__(self, msg)


class HistoryMissing(BzrError):
    def __init__(self, branch, object_type, object_id):
        self.branch = branch
        BzrError.__init__(self,
                          '%s is missing %s {%s}'
                          % (branch, object_type, object_id))


class DivergedBranches(BzrError):

    def __init__(self, branch1, branch2):
        BzrError.__init__(self, "These branches have diverged.  Try merge.")
        self.branch1 = branch1
        self.branch2 = branch2


class UnrelatedBranches(BzrCommandError):
    def __init__(self):
        msg = "Branches have no common ancestor, and no base revision"\
            " specified."
        BzrCommandError.__init__(self, msg)


class NoCommonAncestor(BzrError):
    def __init__(self, revision_a, revision_b):
        msg = "Revisions have no common ancestor: %s %s." \
            % (revision_a, revision_b) 
        BzrError.__init__(self, msg)


class NoCommonRoot(BzrError):
    def __init__(self, revision_a, revision_b):
        msg = "Revisions are not derived from the same root: %s %s." \
            % (revision_a, revision_b) 
        BzrError.__init__(self, msg)



class NotAncestor(BzrError):
    def __init__(self, rev_id, not_ancestor_id):
        msg = "Revision %s is not an ancestor of %s" % (not_ancestor_id, 
                                                        rev_id)
        BzrError.__init__(self, msg)
        self.rev_id = rev_id
        self.not_ancestor_id = not_ancestor_id


class InstallFailed(BzrError):
    def __init__(self, revisions):
        msg = "Could not install revisions:\n%s" % " ,".join(revisions)
        BzrError.__init__(self, msg)
        self.revisions = revisions


class AmbiguousBase(BzrError):
    def __init__(self, bases):
        warn("BzrError AmbiguousBase has been deprecated as of bzrlib 0.8.",
                DeprecationWarning)
        msg = "The correct base is unclear, becase %s are all equally close" %\
            ", ".join(bases)
        BzrError.__init__(self, msg)
        self.bases = bases


class NoCommits(BzrError):
    def __init__(self, branch):
        msg = "Branch %s has no commits." % branch
        BzrError.__init__(self, msg)


class UnlistableStore(BzrError):
    def __init__(self, store):
        BzrError.__init__(self, "Store %s is not listable" % store)



class UnlistableBranch(BzrError):
    def __init__(self, br):
        BzrError.__init__(self, "Stores for branch %s are not listable" % br)


class BoundBranchOutOfDate(BzrNewError):
    """Bound branch %(branch)s is out of date with master branch %(master)s."""
    def __init__(self, branch, master):
        BzrNewError.__init__(self)
        self.branch = branch
        self.master = master

        
class CommitToDoubleBoundBranch(BzrNewError):
    """Cannot commit to branch %(branch)s. It is bound to %(master)s, which is bound to %(remote)s."""
    def __init__(self, branch, master, remote):
        BzrNewError.__init__(self)
        self.branch = branch
        self.master = master
        self.remote = remote


class OverwriteBoundBranch(BzrNewError):
    """Cannot pull --overwrite to a branch which is bound %(branch)s"""
    def __init__(self, branch):
        BzrNewError.__init__(self)
        self.branch = branch


class BoundBranchConnectionFailure(BzrNewError):
    """Unable to connect to target of bound branch %(branch)s => %(target)s: %(error)s"""
    def __init__(self, branch, target, error):
        BzrNewError.__init__(self)
        self.branch = branch
        self.target = target
        self.error = error


class WeaveError(BzrNewError):
    """Error in processing weave: %(message)s"""

    def __init__(self, message=None):
        BzrNewError.__init__(self)
        self.message = message


class WeaveRevisionAlreadyPresent(WeaveError):
    """Revision {%(revision_id)s} already present in %(weave)s"""
    def __init__(self, revision_id, weave):

        WeaveError.__init__(self)
        self.revision_id = revision_id
        self.weave = weave


class WeaveRevisionNotPresent(WeaveError):
    """Revision {%(revision_id)s} not present in %(weave)s"""

    def __init__(self, revision_id, weave):
        WeaveError.__init__(self)
        self.revision_id = revision_id
        self.weave = weave


class WeaveFormatError(WeaveError):
    """Weave invariant violated: %(what)s"""

    def __init__(self, what):
        WeaveError.__init__(self)
        self.what = what


class WeaveParentMismatch(WeaveError):
    """Parents are mismatched between two revisions."""
    

class WeaveInvalidChecksum(WeaveError):
    """Text did not match it's checksum: %(message)s"""


class WeaveTextDiffers(WeaveError):
    """Weaves differ on text content. Revision: {%(revision_id)s}, %(weave_a)s, %(weave_b)s"""

    def __init__(self, revision_id, weave_a, weave_b):
        WeaveError.__init__(self)
        self.revision_id = revision_id
        self.weave_a = weave_a
        self.weave_b = weave_b


class WeaveTextDiffers(WeaveError):
    """Weaves differ on text content. Revision: {%(revision_id)s}, %(weave_a)s, %(weave_b)s"""

    def __init__(self, revision_id, weave_a, weave_b):
        WeaveError.__init__(self)
        self.revision_id = revision_id
        self.weave_a = weave_a
        self.weave_b = weave_b


class VersionedFileError(BzrNewError):
    """Versioned file error."""


class RevisionNotPresent(VersionedFileError):
    """Revision {%(revision_id)s} not present in %(file_id)s."""

    def __init__(self, revision_id, file_id):
        VersionedFileError.__init__(self)
        self.revision_id = revision_id
        self.file_id = file_id


class RevisionAlreadyPresent(VersionedFileError):
    """Revision {%(revision_id)s} already present in %(file_id)s."""

    def __init__(self, revision_id, file_id):
        VersionedFileError.__init__(self)
        self.revision_id = revision_id
        self.file_id = file_id


class KnitError(BzrNewError):
    """Knit error"""


class KnitHeaderError(KnitError):
    """Knit header error: %(badline)r unexpected"""

    def __init__(self, badline):
        KnitError.__init__(self)
        self.badline = badline


class KnitCorrupt(KnitError):
    """Knit %(filename)s corrupt: %(how)s"""

    def __init__(self, filename, how):
        KnitError.__init__(self)
        self.filename = filename
        self.how = how


class NoSuchExportFormat(BzrNewError):
    """Export format %(format)r not supported"""
    def __init__(self, format):
        BzrNewError.__init__(self)
        self.format = format


class TransportError(BzrError):
    """All errors thrown by Transport implementations should derive
    from this class.
    """
    def __init__(self, msg=None, orig_error=None):
        if msg is None and orig_error is not None:
            msg = str(orig_error)
        BzrError.__init__(self, msg)
        self.msg = msg
        self.orig_error = orig_error


# A set of semi-meaningful errors which can be thrown
class TransportNotPossible(TransportError):
    """This is for transports where a specific function is explicitly not
    possible. Such as pushing files to an HTTP server.
    """
    pass


class ConnectionError(TransportError):
    """A connection problem prevents file retrieval.
    This does not indicate whether the file exists or not; it indicates that a
    precondition for requesting the file was not met.
    """
    def __init__(self, msg=None, orig_error=None):
        TransportError.__init__(self, msg=msg, orig_error=orig_error)


class ConnectionReset(TransportError):
    """The connection has been closed."""
    pass


class ConflictsInTree(BzrError):
    def __init__(self):
        BzrError.__init__(self, "Working tree has conflicts.")


class ParseConfigError(BzrError):
    def __init__(self, errors, filename):
        if filename is None:
            filename = ""
        message = "Error(s) parsing config file %s:\n%s" % \
            (filename, ('\n'.join(e.message for e in errors)))
        BzrError.__init__(self, message)


class SigningFailed(BzrError):
    def __init__(self, command_line):
        BzrError.__init__(self, "Failed to gpg sign data with command '%s'"
                               % command_line)


class WorkingTreeNotRevision(BzrError):
    def __init__(self, tree):
        BzrError.__init__(self, "The working tree for %s has changed since"
                          " last commit, but weave merge requires that it be"
                          " unchanged." % tree.basedir)


class CantReprocessAndShowBase(BzrNewError):
    """Can't reprocess and show base.
Reprocessing obscures relationship of conflicting lines to base."""


class GraphCycleError(BzrNewError):
    """Cycle in graph %(graph)r"""
    def __init__(self, graph):
        BzrNewError.__init__(self)
        self.graph = graph


class NotConflicted(BzrNewError):
    """File %(filename)s is not conflicted."""

    def __init__(self, filename):
        BzrNewError.__init__(self)
        self.filename = filename


class MustUseDecorated(Exception):
    """A decorating function has requested its original command be used.
    
    This should never escape bzr, so does not need to be printable.
    """


class MissingText(BzrNewError):
    """Branch %(base)s is missing revision %(text_revision)s of %(file_id)s"""

    def __init__(self, branch, text_revision, file_id):
        BzrNewError.__init__(self)
        self.branch = branch
        self.base = branch.base
        self.text_revision = text_revision
        self.file_id = file_id


class DuplicateKey(BzrNewError):
    """Key %(key)s is already present in map"""


class MalformedTransform(BzrNewError):
    """Tree transform is malformed %(conflicts)r"""


class BzrBadParameter(BzrNewError):
    """A bad parameter : %(param)s is not usable.
    
    This exception should never be thrown, but it is a base class for all
    parameter-to-function errors.
    """
    def __init__(self, param):
        BzrNewError.__init__(self)
        self.param = param


class BzrBadParameterNotUnicode(BzrBadParameter):
    """Parameter %(param)s is neither unicode nor utf8."""


class ReusingTransform(BzrNewError):
    """Attempt to reuse a transform that has already been applied."""


class CantMoveRoot(BzrNewError):
    """Moving the root directory is not supported at this time"""


class BzrBadParameterNotString(BzrBadParameter):
    """Parameter %(param)s is not a string or unicode string."""


class BzrBadParameterMissing(BzrBadParameter):
    """Parameter $(param)s is required but not present."""


class BzrBadParameterUnicode(BzrBadParameter):
    """Parameter %(param)s is unicode but only byte-strings are permitted."""


class BzrBadParameterContainsNewline(BzrBadParameter):
    """Parameter %(param)s contains a newline."""


class DependencyNotPresent(BzrNewError):
    """Unable to import library "%(library)s": %(error)s"""

    def __init__(self, library, error):
        BzrNewError.__init__(self, library=library, error=error)


class ParamikoNotPresent(DependencyNotPresent):
    """Unable to import paramiko (required for sftp support): %(error)s"""

    def __init__(self, error):
        DependencyNotPresent.__init__(self, 'paramiko', error)


class UninitializableFormat(BzrNewError):
    """Format %(format)s cannot be initialised by this version of bzr."""

    def __init__(self, format):
        BzrNewError.__init__(self)
        self.format = format


class NoDiff3(BzrNewError):
    """Diff3 is not installed on this machine."""


class ExistingLimbo(BzrNewError):
    """This tree contains left-over files from a failed operation.
    Please examine %(limbo_dir)s to see if it contains any files you wish to
    keep, and delete it when you are done.
    """
    def __init__(self, limbo_dir):
       BzrNewError.__init__(self)
       self.limbo_dir = limbo_dir


class ImmortalLimbo(BzrNewError):
    """Unable to delete transform temporary directory $(limbo_dir)s.
    Please examine %(limbo_dir)s to see if it contains any files you wish to
    keep, and delete it when you are done.
    """
    def __init__(self, limbo_dir):
       BzrNewError.__init__(self)
       self.limbo_dir = limbo_dir


class OutOfDateTree(BzrNewError):
    """Working tree is out of date, please run 'bzr update'."""

    def __init__(self, tree):
        BzrNewError.__init__(self)
        self.tree = tree


class MergeModifiedFormatError(BzrNewError):
    """Error in merge modified format"""


class ConflictFormatError(BzrNewError):
    """Format error in conflict listings"""


class CorruptRepository(BzrNewError):
    """An error has been detected in the repository %(repo_path)s.
Please run bzr reconcile on this repository."""

    def __init__(self, repo):
        BzrNewError.__init__(self)
        self.repo_path = repo.bzrdir.root_transport.base


class UpgradeRequired(BzrNewError):
    """To use this feature you must upgrade your branch at %(path)s."""

    def __init__(self, path):
        BzrNewError.__init__(self)
        self.path = path


class LocalRequiresBoundBranch(BzrNewError):
    """Cannot perform local-only commits on unbound branches."""


class MissingProgressBarFinish(BzrNewError):
    """A nested progress bar was not 'finished' correctly."""


class UnsupportedOperation(BzrNewError):
    """The method %(mname)s is not supported on objects of type %(tname)s."""
    def __init__(self, method, method_self):
        self.method = method
        self.mname = method.__name__
        self.tname = type(method_self).__name__


class BinaryFile(BzrNewError):
    """File is binary but should be text."""


class IllegalPath(BzrNewError):
    """The path %(path)s is not permitted on this platform"""

    def __init__(self, path):
        BzrNewError.__init__(self)
        self.path = path