14
15
# along with this program; if not, write to the Free Software
15
16
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17
"""Exceptions for bzr, and reporting of them.
19
Exceptions are caught at a high level to report errors to the user, and
20
might also be caught inside the program. Therefore it needs to be
21
possible to convert them to a meaningful string, and also for them to be
22
interrogated by the program.
24
Exceptions are defined such that the arguments given to the constructor
25
are stored in the object as properties of the same name. When the
26
object is printed as a string, the doc string of the class is used as
27
a format string with the property dictionary available to it.
29
This means that exceptions can used like this:
33
... raise NotBranchError(path='/foo/bar')
35
... print sys.exc_type
36
... print sys.exc_value
37
... path = getattr(sys.exc_value, 'path')
38
... if path is not None:
40
bzrlib.errors.NotBranchError
41
Not a branch: /foo/bar
46
* create a new exception class for any class of error that can be
47
usefully distinguished.
49
* the printable form of an exception is generated by the base class
52
Exception strings should start with a capital letter and not have a final
56
# based on Scott James Remnant's hct error classes
58
# TODO: is there any value in providing the .args field used by standard
59
# python exceptions? A list of values with no names seems less useful
62
# TODO: Perhaps convert the exception to a string at the moment it's
63
# constructed to make sure it will succeed. But that says nothing about
64
# exceptions that are never raised.
66
# TODO: Convert all the other error classes here to BzrNewError, and eliminate
19
__copyright__ = "Copyright (C) 2005 Canonical Ltd."
20
__author__ = "Martin Pool <mbp@canonical.com>"
23
######################################################################
70
25
class BzrError(StandardError):
72
# XXX: Should we show the exception class in
73
# exceptions that don't provide their own message?
74
# maybe it should be done at a higher level
75
## n = self.__class__.__name__ + ': '
77
if len(self.args) == 1:
78
return str(self.args[0])
79
elif len(self.args) == 2:
80
# further explanation or suggestions
82
return n + '\n '.join([self.args[0]] + self.args[1])
84
return n + "%r" % self
86
return n + `self.args`
89
class BzrNewError(BzrError):
91
# base classes should override the docstring with their human-
92
# readable explanation
94
def __init__(self, **kwds):
95
for key, value in kwds.items():
96
setattr(self, key, value)
100
return self.__doc__ % self.__dict__
101
except (NameError, ValueError, KeyError), e:
102
return 'Unprintable exception %s: %s' \
103
% (self.__class__.__name__, str(e))
106
class BzrCheckError(BzrNewError):
107
"""Internal check failed: %(message)s"""
108
def __init__(self, message):
109
BzrNewError.__init__(self)
110
self.message = message
113
class InvalidEntryName(BzrNewError):
114
"""Invalid entry name: %(name)s"""
115
def __init__(self, name):
116
BzrNewError.__init__(self)
120
class InvalidRevisionNumber(BzrNewError):
121
"""Invalid revision number %(revno)d"""
122
def __init__(self, revno):
123
BzrNewError.__init__(self)
127
class InvalidRevisionId(BzrNewError):
128
"""Invalid revision-id {%(revision_id)s} in %(branch)s"""
129
def __init__(self, revision_id, branch):
130
BzrNewError.__init__(self)
131
self.revision_id = revision_id
135
class NoWorkingTree(BzrNewError):
136
"""No WorkingTree exists for %s(base)."""
138
def __init__(self, base):
139
BzrNewError.__init__(self)
28
class BzrCheckError(BzrError):
143
32
class BzrCommandError(BzrError):
144
33
# Error from malformed user command
145
# This is being misused as a generic exception
146
# pleae subclass. RBC 20051030
148
# I think it's a waste of effort to differentiate between errors that
149
# are not intended to be caught anyway. UI code need not subclass
150
# BzrCommandError, and non-UI code should not throw a subclass of
151
# BzrCommandError. ADHB 20051211
156
class BzrOptionError(BzrCommandError):
157
"""Some missing or otherwise incorrect option was supplied."""
160
class StrictCommitFailed(Exception):
161
"""Commit refused because there are unknowns in the tree."""
164
class PathError(BzrNewError):
165
"""Generic path error: %(path)r%(extra)s)"""
166
def __init__(self, path, extra=None):
167
BzrNewError.__init__(self)
170
self.extra = ': ' + str(extra)
175
class NoSuchFile(PathError):
176
"""No such file: %(path)r%(extra)s"""
179
class FileExists(PathError):
180
"""File exists: %(path)r%(extra)s"""
183
class PermissionDenied(PathError):
184
"""Permission denied: %(path)r%(extra)s"""
187
class PathNotChild(BzrNewError):
188
"""Path %(path)r is not a child of path %(base)r%(extra)s"""
189
def __init__(self, path, base, extra=None):
190
BzrNewError.__init__(self)
194
self.extra = ': ' + str(extra)
199
class NotBranchError(BzrNewError):
200
"""Not a branch: %(path)s"""
201
def __init__(self, path):
202
BzrNewError.__init__(self)
206
class FileInWrongBranch(BzrNewError):
207
"""File %(path)s in not in branch %(branch_base)s."""
208
def __init__(self, branch, path):
209
BzrNewError.__init__(self)
211
self.branch_base = branch.base
215
class UnsupportedFormatError(BzrError):
216
"""Specified path is a bzr branch that we recognize but cannot read."""
218
return 'unsupported branch format: %s' % self.args[0]
221
class UnknownFormatError(BzrError):
222
"""Specified path is a bzr branch whose format we do not recognize."""
224
return 'unknown branch format: %s' % self.args[0]
227
class NotVersionedError(BzrNewError):
228
"""%(path)s is not versioned"""
229
def __init__(self, path):
230
BzrNewError.__init__(self)
234
class BadFileKindError(BzrError):
235
"""Specified file is of a kind that cannot be added.
237
(For example a symlink or device file.)"""
240
class ForbiddenFileError(BzrError):
241
"""Cannot operate on a file because it is a control file."""
244
class LockError(Exception):
246
# All exceptions from the lock/unlock functions should be from
247
# this exception class. They will be translated as necessary. The
248
# original exception is available as e.original_error
251
class CommitNotPossible(LockError):
252
"""A commit was attempted but we do not have a write lock open."""
255
class AlreadyCommitted(LockError):
256
"""A rollback was requested, but is not able to be accomplished."""
259
class ReadOnlyError(LockError):
260
"""A write attempt was made in a read only transaction."""
263
class PointlessCommit(BzrNewError):
264
"""No changes to commit"""
267
class UpgradeReadonly(BzrNewError):
268
"""Upgrade URL cannot work with readonly URL's."""
271
class StrictCommitFailed(Exception):
272
"""Commit refused because there are unknowns in the tree."""
275
class NoSuchRevision(BzrError):
276
def __init__(self, branch, revision):
278
self.revision = revision
279
msg = "Branch %s has no revision %s" % (branch, revision)
280
BzrError.__init__(self, msg)
283
class HistoryMissing(BzrError):
284
def __init__(self, branch, object_type, object_id):
286
BzrError.__init__(self,
287
'%s is missing %s {%s}'
288
% (branch, object_type, object_id))
291
class DivergedBranches(BzrError):
292
def __init__(self, branch1, branch2):
293
BzrError.__init__(self, "These branches have diverged. Try merge.")
294
self.branch1 = branch1
295
self.branch2 = branch2
298
class UnrelatedBranches(BzrCommandError):
300
msg = "Branches have no common ancestor, and no base revision"\
302
BzrCommandError.__init__(self, msg)
304
class NoCommonAncestor(BzrError):
305
def __init__(self, revision_a, revision_b):
306
msg = "Revisions have no common ancestor: %s %s." \
307
% (revision_a, revision_b)
308
BzrError.__init__(self, msg)
310
class NoCommonRoot(BzrError):
311
def __init__(self, revision_a, revision_b):
312
msg = "Revisions are not derived from the same root: %s %s." \
313
% (revision_a, revision_b)
314
BzrError.__init__(self, msg)
316
class NotAncestor(BzrError):
317
def __init__(self, rev_id, not_ancestor_id):
318
msg = "Revision %s is not an ancestor of %s" % (not_ancestor_id,
320
BzrError.__init__(self, msg)
322
self.not_ancestor_id = not_ancestor_id
325
class InstallFailed(BzrError):
326
def __init__(self, revisions):
327
msg = "Could not install revisions:\n%s" % " ,".join(revisions)
328
BzrError.__init__(self, msg)
329
self.revisions = revisions
332
class AmbiguousBase(BzrError):
333
def __init__(self, bases):
334
msg = "The correct base is unclear, becase %s are all equally close" %\
336
BzrError.__init__(self, msg)
339
class NoCommits(BzrError):
340
def __init__(self, branch):
341
msg = "Branch %s has no commits." % branch
342
BzrError.__init__(self, msg)
344
class UnlistableStore(BzrError):
345
def __init__(self, store):
346
BzrError.__init__(self, "Store %s is not listable" % store)
348
class UnlistableBranch(BzrError):
349
def __init__(self, br):
350
BzrError.__init__(self, "Stores for branch %s are not listable" % br)
353
class WeaveError(BzrNewError):
354
"""Error in processing weave: %(message)s"""
355
def __init__(self, message=None):
356
BzrNewError.__init__(self)
357
self.message = message
360
class WeaveRevisionAlreadyPresent(WeaveError):
361
"""Revision {%(revision_id)s} already present in %(weave)s"""
362
def __init__(self, revision_id, weave):
363
WeaveError.__init__(self)
364
self.revision_id = revision_id
368
class WeaveRevisionNotPresent(WeaveError):
369
"""Revision {%(revision_id)s} not present in %(weave)s"""
370
def __init__(self, revision_id, weave):
371
WeaveError.__init__(self)
372
self.revision_id = revision_id
376
class WeaveFormatError(WeaveError):
377
"""Weave invariant violated: %(what)s"""
378
def __init__(self, what):
379
WeaveError.__init__(self)
383
class WeaveParentMismatch(WeaveError):
384
"""Parents are mismatched between two revisions."""
387
class WeaveInvalidChecksum(WeaveError):
388
"""Text did not match it's checksum: %(message)s"""
391
class WeaveTextDiffers(WeaveError):
392
"""Weaves differ on text content. Revision: {%(revision_id)s}, %(weave_a)s, %(weave_b)s"""
394
def __init__(self, revision_id, weave_a, weave_b):
395
WeaveError.__init__(self)
396
self.revision_id = revision_id
397
self.weave_a = weave_a
398
self.weave_b = weave_b
401
class NoSuchExportFormat(BzrNewError):
402
"""Export format %(format)r not supported"""
403
def __init__(self, format):
404
BzrNewError.__init__(self)
408
class TransportError(BzrError):
409
"""All errors thrown by Transport implementations should derive
412
def __init__(self, msg=None, orig_error=None):
413
if msg is None and orig_error is not None:
414
msg = str(orig_error)
415
BzrError.__init__(self, msg)
417
self.orig_error = orig_error
419
# A set of semi-meaningful errors which can be thrown
420
class TransportNotPossible(TransportError):
421
"""This is for transports where a specific function is explicitly not
422
possible. Such as pushing files to an HTTP server.
427
class ConnectionError(TransportError):
428
"""A connection problem prevents file retrieval.
429
This does not indicate whether the file exists or not; it indicates that a
430
precondition for requesting the file was not met.
432
def __init__(self, msg=None, orig_error=None):
433
TransportError.__init__(self, msg=msg, orig_error=orig_error)
436
class ConnectionReset(TransportError):
437
"""The connection has been closed."""
440
class ConflictsInTree(BzrError):
442
BzrError.__init__(self, "Working tree has conflicts.")
444
class ParseConfigError(BzrError):
445
def __init__(self, errors, filename):
448
message = "Error(s) parsing config file %s:\n%s" % \
449
(filename, ('\n'.join(e.message for e in errors)))
450
BzrError.__init__(self, message)
452
class SigningFailed(BzrError):
453
def __init__(self, command_line):
454
BzrError.__init__(self, "Failed to gpg sign data with command '%s'"
457
class WorkingTreeNotRevision(BzrError):
458
def __init__(self, tree):
459
BzrError.__init__(self, "The working tree for %s has changed since"
460
" last commit, but weave merge requires that it be"
461
" unchanged." % tree.basedir)
463
class CantReprocessAndShowBase(BzrNewError):
464
"""Can't reprocess and show base.
465
Reprocessing obscures relationship of conflicting lines to base."""
467
class GraphCycleError(BzrNewError):
468
"""Cycle in graph %(graph)r"""
469
def __init__(self, graph):
470
BzrNewError.__init__(self)
474
class NotConflicted(BzrNewError):
475
"""File %(filename)s is not conflicted."""
477
def __init__(self, filename):
478
BzrNewError.__init__(self)
479
self.filename = filename
482
class MustUseDecorated(Exception):
483
"""A decorating function has requested its original command be used.
485
This should never escape bzr, so does not need to be printable.
489
class MissingText(BzrNewError):
490
"""Branch %(base)s is missing revision %(text_revision)s of %(file_id)s"""
492
def __init__(self, branch, text_revision, file_id):
493
BzrNewError.__init__(self)
495
self.base = branch.base
496
self.text_revision = text_revision
497
self.file_id = file_id
500
class BzrBadParameter(BzrNewError):
501
"""A bad parameter : %(param)s is not usable.
503
This exception should never be thrown, but it is a base class for all
504
parameter-to-function errors.
506
def __init__(self, param):
507
BzrNewError.__init__(self)
511
class BzrBadParameterNotUnicode(BzrBadParameter):
512
"""Parameter %(param)s is neither unicode nor utf8."""
515
class BzrBadParameterNotString(BzrBadParameter):
516
"""Parameter %(param)s is not a string or unicode string."""
519
class DependencyNotPresent(BzrNewError):
520
"""Unable to import library: %(library)s, %(error)s"""
522
def __init__(self, library, error):
523
BzrNewError.__init__(self, library=library, error=error)
526
class ParamikoNotPresent(DependencyNotPresent):
527
"""Unable to import paramiko (required for sftp support): %(error)s"""
529
def __init__(self, error):
530
DependencyNotPresent.__init__(self, 'paramiko', error)
533
class UninitializableFormat(BzrNewError):
534
"""Format %(format)s cannot be initialised by this version of bzr."""
536
def __init__(self, format):
537
BzrNewError.__init__(self)
37
def bailout(msg, explanation=[]):
38
ex = BzrError(msg, explanation)
40
trace._tracefile.write('* raising %s\n' % ex)
added
removed
bzrlib/errors.py
