15
14
# along with this program; if not, write to the Free Software
16
15
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19
__copyright__ = "Copyright (C) 2005 Canonical Ltd."
20
__author__ = "Martin Pool <mbp@canonical.com>"
23
######################################################################
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
... print sys.exc_value.path
38
bzrlib.errors.NotBranchError
39
Not a branch: /foo/bar
44
* create a new exception class for any class of error that can be
45
usefully distinguished.
47
* the printable form of an exception is generated by the base class
50
Exception strings should start with a capital letter and not have a final
54
# based on Scott James Remnant's hct error classes
56
# TODO: is there any value in providing the .args field used by standard
57
# python exceptions? A list of values with no names seems less useful
60
# TODO: Perhaps convert the exception to a string at the moment it's
61
# constructed to make sure it will succeed. But that says nothing about
62
# exceptions that are never raised.
64
# TODO: Convert all the other error classes here to BzrNewError, and eliminate
25
68
class BzrError(StandardError):
28
class BzrCheckError(BzrError):
34
def bailout(msg, explanation=[]):
35
ex = BzrError(msg, explanation)
37
trace._tracefile.write('* raising %s\n' % ex)
70
# XXX: Should we show the exception class in
71
# exceptions that don't provide their own message?
72
# maybe it should be done at a higher level
73
## n = self.__class__.__name__ + ': '
75
if len(self.args) == 1:
76
return str(self.args[0])
77
elif len(self.args) == 2:
78
# further explanation or suggestions
80
return n + '\n '.join([self.args[0]] + self.args[1])
82
return n + "%r" % self
84
return n + `self.args`
87
class BzrNewError(BzrError):
89
# base classes should override the docstring with their human-
90
# readable explanation
92
def __init__(self, **kwds):
93
for key, value in kwds.items():
94
setattr(self, key, value)
98
return self.__doc__ % self.__dict__
99
except (NameError, ValueError, KeyError), e:
100
return 'Unprintable exception %s: %s' \
101
% (self.__class__.__name__, str(e))
104
class BzrCheckError(BzrNewError):
105
"""Internal check failed: %(message)s"""
106
def __init__(self, message):
107
BzrNewError.__init__(self)
108
self.message = message
111
class InvalidEntryName(BzrNewError):
112
"""Invalid entry name: %(name)s"""
113
def __init__(self, name):
114
BzrNewError.__init__(self)
118
class InvalidRevisionNumber(BzrNewError):
119
"""Invalid revision number %(revno)d"""
120
def __init__(self, revno):
121
BzrNewError.__init__(self)
125
class InvalidRevisionId(BzrNewError):
126
"""Invalid revision-id {%(revision_id)s} in %(branch)s"""
127
def __init__(self, revision_id, branch):
128
BzrNewError.__init__(self)
129
self.revision_id = revision_id
133
class NoWorkingTree(BzrNewError):
134
"""No WorkingTree exists for %s(base)."""
136
def __init__(self, base):
137
BzrNewError.__init__(self)
141
class BzrCommandError(BzrError):
142
# Error from malformed user command
143
# This is being misused as a generic exception
144
# pleae subclass. RBC 20051030
149
class BzrOptionError(BzrCommandError):
150
"""Some missing or otherwise incorrect option was supplied."""
153
class StrictCommitFailed(Exception):
154
"""Commit refused because there are unknowns in the tree."""
157
class PathError(BzrNewError):
158
"""Generic path error: %(path)r%(extra)s)"""
159
def __init__(self, path, extra=None):
160
BzrNewError.__init__(self)
163
self.extra = ': ' + str(extra)
168
class NoSuchFile(PathError):
169
"""No such file: %(path)r%(extra)s"""
172
class FileExists(PathError):
173
"""File exists: %(path)r%(extra)s"""
176
class PermissionDenied(PathError):
177
"""Permission denied: %(path)r%(extra)s"""
180
class PathNotChild(BzrNewError):
181
"""Path %(path)r is not a child of path %(base)r%(extra)s"""
182
def __init__(self, path, base, extra=None):
183
BzrNewError.__init__(self)
187
self.extra = ': ' + str(extra)
192
class NotBranchError(BzrNewError):
193
"""Not a branch: %(path)s"""
194
def __init__(self, path):
195
BzrNewError.__init__(self)
199
class FileInWrongBranch(BzrNewError):
200
"""File %(path)s in not in branch %(branch_base)s."""
201
def __init__(self, branch, path):
202
BzrNewError.__init__(self)
204
self.branch_base = branch.base
208
class UnsupportedFormatError(BzrError):
209
"""Specified path is a bzr branch that we cannot read."""
211
return 'unsupported branch format: %s' % self.args[0]
214
class NotVersionedError(BzrNewError):
215
"""%(path)s is not versioned"""
216
def __init__(self, path):
217
BzrNewError.__init__(self)
221
class BadFileKindError(BzrError):
222
"""Specified file is of a kind that cannot be added.
224
(For example a symlink or device file.)"""
227
class ForbiddenFileError(BzrError):
228
"""Cannot operate on a file because it is a control file."""
231
class LockError(Exception):
233
# All exceptions from the lock/unlock functions should be from
234
# this exception class. They will be translated as necessary. The
235
# original exception is available as e.original_error
238
class CommitNotPossible(LockError):
239
"""A commit was attempted but we do not have a write lock open."""
242
class AlreadyCommitted(LockError):
243
"""A rollback was requested, but is not able to be accomplished."""
246
class ReadOnlyError(LockError):
247
"""A write attempt was made in a read only transaction."""
250
class PointlessCommit(BzrNewError):
251
"""No changes to commit"""
253
class StrictCommitFailed(Exception):
254
"""Commit refused because there are unknowns in the tree."""
256
class NoSuchRevision(BzrError):
257
def __init__(self, branch, revision):
259
self.revision = revision
260
msg = "Branch %s has no revision %s" % (branch, revision)
261
BzrError.__init__(self, msg)
264
class HistoryMissing(BzrError):
265
def __init__(self, branch, object_type, object_id):
267
BzrError.__init__(self,
268
'%s is missing %s {%s}'
269
% (branch, object_type, object_id))
272
class DivergedBranches(BzrError):
273
def __init__(self, branch1, branch2):
274
BzrError.__init__(self, "These branches have diverged. Try merge.")
275
self.branch1 = branch1
276
self.branch2 = branch2
279
class UnrelatedBranches(BzrCommandError):
281
msg = "Branches have no common ancestor, and no base revision"\
283
BzrCommandError.__init__(self, msg)
285
class NoCommonAncestor(BzrError):
286
def __init__(self, revision_a, revision_b):
287
msg = "Revisions have no common ancestor: %s %s." \
288
% (revision_a, revision_b)
289
BzrError.__init__(self, msg)
291
class NoCommonRoot(BzrError):
292
def __init__(self, revision_a, revision_b):
293
msg = "Revisions are not derived from the same root: %s %s." \
294
% (revision_a, revision_b)
295
BzrError.__init__(self, msg)
297
class NotAncestor(BzrError):
298
def __init__(self, rev_id, not_ancestor_id):
299
msg = "Revision %s is not an ancestor of %s" % (not_ancestor_id,
301
BzrError.__init__(self, msg)
303
self.not_ancestor_id = not_ancestor_id
306
class InstallFailed(BzrError):
307
def __init__(self, revisions):
308
msg = "Could not install revisions:\n%s" % " ,".join(revisions)
309
BzrError.__init__(self, msg)
310
self.revisions = revisions
313
class AmbiguousBase(BzrError):
314
def __init__(self, bases):
315
msg = "The correct base is unclear, becase %s are all equally close" %\
317
BzrError.__init__(self, msg)
320
class NoCommits(BzrError):
321
def __init__(self, branch):
322
msg = "Branch %s has no commits." % branch
323
BzrError.__init__(self, msg)
325
class UnlistableStore(BzrError):
326
def __init__(self, store):
327
BzrError.__init__(self, "Store %s is not listable" % store)
329
class UnlistableBranch(BzrError):
330
def __init__(self, br):
331
BzrError.__init__(self, "Stores for branch %s are not listable" % br)
334
class WeaveError(BzrNewError):
335
"""Error in processing weave: %(message)s"""
336
def __init__(self, message=None):
337
BzrNewError.__init__(self)
338
self.message = message
341
class WeaveRevisionAlreadyPresent(WeaveError):
342
"""Revision {%(revision_id)s} already present in %(weave)s"""
343
def __init__(self, revision_id, weave):
344
WeaveError.__init__(self)
345
self.revision_id = revision_id
349
class WeaveRevisionNotPresent(WeaveError):
350
"""Revision {%(revision_id)s} not present in %(weave)s"""
351
def __init__(self, revision_id, weave):
352
WeaveError.__init__(self)
353
self.revision_id = revision_id
357
class WeaveFormatError(WeaveError):
358
"""Weave invariant violated: %(what)s"""
359
def __init__(self, what):
360
WeaveError.__init__(self)
364
class WeaveParentMismatch(WeaveError):
365
"""Parents are mismatched between two revisions."""
368
class NoSuchExportFormat(BzrNewError):
369
"""Export format %(format)r not supported"""
370
def __init__(self, format):
371
BzrNewError.__init__(self)
375
class TransportError(BzrError):
376
"""All errors thrown by Transport implementations should derive
379
def __init__(self, msg=None, orig_error=None):
380
if msg is None and orig_error is not None:
381
msg = str(orig_error)
382
BzrError.__init__(self, msg)
384
self.orig_error = orig_error
386
# A set of semi-meaningful errors which can be thrown
387
class TransportNotPossible(TransportError):
388
"""This is for transports where a specific function is explicitly not
389
possible. Such as pushing files to an HTTP server.
394
class ConnectionError(TransportError):
395
"""A connection problem prevents file retrieval.
396
This does not indicate whether the file exists or not; it indicates that a
397
precondition for requesting the file was not met.
399
def __init__(self, msg=None, orig_error=None):
400
TransportError.__init__(self, msg=msg, orig_error=orig_error)
403
class ConnectionReset(TransportError):
404
"""The connection has been closed."""
407
class ConflictsInTree(BzrError):
409
BzrError.__init__(self, "Working tree has conflicts.")
411
class ParseConfigError(BzrError):
412
def __init__(self, errors, filename):
415
message = "Error(s) parsing config file %s:\n%s" % \
416
(filename, ('\n'.join(e.message for e in errors)))
417
BzrError.__init__(self, message)
419
class SigningFailed(BzrError):
420
def __init__(self, command_line):
421
BzrError.__init__(self, "Failed to gpg sign data with command '%s'"
424
class WorkingTreeNotRevision(BzrError):
425
def __init__(self, tree):
426
BzrError.__init__(self, "The working tree for %s has changed since"
427
" last commit, but weave merge requires that it be"
428
" unchanged." % tree.basedir)
430
class CantReprocessAndShowBase(BzrNewError):
431
"""Can't reprocess and show base.
432
Reprocessing obscures relationship of conflicting lines to base."""
434
class GraphCycleError(BzrNewError):
435
"""Cycle in graph %(graph)r"""
436
def __init__(self, graph):
437
BzrNewError.__init__(self)
440
class NotConflicted(BzrNewError):
441
"""File %(filename)s is not conflicted."""
442
def __init__(self, filename):
443
BzrNewError.__init__(self)
444
self.filename = filename
446
class MustUseDecorated(Exception):
447
"""A decorating function has requested its original command be used.
449
This should never escape bzr, so does not need to be printable.
452
class MissingText(BzrNewError):
453
"""Branch %(base)s is missing revision %(text_revision)s of %(file_id)s"""
454
def __init__(self, branch, text_revision, file_id):
456
self.base = branch.base
457
self.text_revision = text_revision
458
self.file_id = file_id
added
removed
bzrlib/errors.py
