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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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"""Exceptions for bzr, and reporting of them.
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Exceptions are caught at a high level to report errors to the user, and
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might also be caught inside the program. Therefore it needs to be
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possible to convert them to a meaningful string, and also for them to be
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interrogated by the program.
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Exceptions are defined such that the arguments given to the constructor
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are stored in the object as properties of the same name. When the
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object is printed as a string, the doc string of the class is used as
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a format string with the property dictionary available to it.
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This means that exceptions can used like this:
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... raise NotBranchError(path='/foo/bar')
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... print sys.exc_type
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... print sys.exc_value
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... print sys.exc_value.path
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bzrlib.errors.NotBranchError
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Not a branch: /foo/bar
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* create a new exception class for any class of error that can be
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usefully distinguished.
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* the printable form of an exception is generated by the base class
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# based on Scott James Remnant's hct error classes
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# TODO: is there any value in providing the .args field used by standard
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# python exceptions? A list of values with no names seems less useful
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# TODO: Perhaps convert the exception to a string at the moment it's
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# constructed to make sure it will succeed. But that says nothing about
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# exceptions that are never raised.
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# TODO: Convert all the other error classes here to BzrNewError, and eliminate
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__copyright__ = "Copyright (C) 2005 Canonical Ltd."
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__author__ = "Martin Pool <mbp@canonical.com>"
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######################################################################
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class BzrError(StandardError):
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# XXX: Should we show the exception class in
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# exceptions that don't provide their own message?
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# maybe it should be done at a higher level
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## n = self.__class__.__name__ + ': '
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if len(self.args) == 1:
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return str(self.args[0])
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elif len(self.args) == 2:
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# further explanation or suggestions
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return n + '\n '.join([self.args[0]] + self.args[1])
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return n + "%r" % self
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return n + `self.args`
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class BzrNewError(BzrError):
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# base classes should override the docstring with their human-
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# readable explanation
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def __init__(self, **kwds):
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for key, value in kwds.items():
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setattr(self, key, value)
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return self.__doc__ % self.__dict__
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except (NameError, ValueError, KeyError), e:
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return 'Unprintable exception %s: %s' \
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% (self.__class__.__name__, str(e))
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class BzrCheckError(BzrNewError):
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"""Internal check failed: %(message)s"""
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def __init__(self, message):
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self.message = message
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class InvalidEntryName(BzrNewError):
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"""Invalid entry name: %(name)s"""
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def __init__(self, name):
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class InvalidRevisionNumber(BzrNewError):
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"""Invalid revision number %(revno)d"""
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def __init__(self, revno):
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class InvalidRevisionId(BzrNewError):
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"""Invalid revision-id"""
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class BzrCommandError(BzrError):
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# Error from malformed user command
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class StrictCommitFailed(Exception):
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"""Commit refused because there are unknowns in the tree."""
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class NotBranchError(BzrNewError):
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"""Not a branch: %(path)s"""
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def __init__(self, path):
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BzrNewError.__init__(self)
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class UnsupportedFormatError(BzrError):
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"""Specified path is a bzr branch that we cannot read."""
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return 'unsupported branch format: %s' % self.args[0]
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class NotVersionedError(BzrNewError):
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"""%(path)s is not versioned"""
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def __init__(self, path):
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BzrNewError.__init__(self)
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class BadFileKindError(BzrError):
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"""Specified file is of a kind that cannot be added.
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(For example a symlink or device file.)"""
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class ForbiddenFileError(BzrError):
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"""Cannot operate on a file because it is a control file."""
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class LockError(Exception):
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# All exceptions from the lock/unlock functions should be from
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# this exception class. They will be translated as necessary. The
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# original exception is available as e.original_error
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class CommitNotPossible(LockError):
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"""A commit was attempted but we do not have a write lock open."""
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class AlreadyCommitted(LockError):
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"""A rollback was requested, but is not able to be accomplished."""
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class ReadOnlyError(LockError):
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"""A write attempt was made in a read only transaction."""
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class PointlessCommit(BzrNewError):
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"""No changes to commit"""
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class NoSuchRevision(BzrError):
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def __init__(self, branch, revision):
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self.revision = revision
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msg = "Branch %s has no revision %s" % (branch, revision)
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BzrError.__init__(self, msg)
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class HistoryMissing(BzrError):
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def __init__(self, branch, object_type, object_id):
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BzrError.__init__(self,
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'%s is missing %s {%s}'
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% (branch, object_type, object_id))
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class DivergedBranches(BzrError):
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def __init__(self, branch1, branch2):
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BzrError.__init__(self, "These branches have diverged.")
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self.branch1 = branch1
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self.branch2 = branch2
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class UnrelatedBranches(BzrCommandError):
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msg = "Branches have no common ancestor, and no base revision"\
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BzrCommandError.__init__(self, msg)
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class NoCommonAncestor(BzrError):
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def __init__(self, revision_a, revision_b):
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msg = "Revisions have no common ancestor: %s %s." \
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% (revision_a, revision_b)
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BzrError.__init__(self, msg)
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class NoCommonRoot(BzrError):
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def __init__(self, revision_a, revision_b):
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msg = "Revisions are not derived from the same root: %s %s." \
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% (revision_a, revision_b)
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BzrError.__init__(self, msg)
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class NotAncestor(BzrError):
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def __init__(self, rev_id, not_ancestor_id):
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msg = "Revision %s is not an ancestor of %s" % (not_ancestor_id,
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BzrError.__init__(self, msg)
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self.not_ancestor_id = not_ancestor_id
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class NotAncestor(BzrError):
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def __init__(self, rev_id, not_ancestor_id):
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self.not_ancestor_id = not_ancestor_id
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msg = "Revision %s is not an ancestor of %s" % (not_ancestor_id,
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BzrError.__init__(self, msg)
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class InstallFailed(BzrError):
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def __init__(self, revisions):
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msg = "Could not install revisions:\n%s" % " ,".join(revisions)
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BzrError.__init__(self, msg)
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self.revisions = revisions
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class AmbiguousBase(BzrError):
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def __init__(self, bases):
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msg = "The correct base is unclear, becase %s are all equally close" %\
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BzrError.__init__(self, msg)
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class NoCommits(BzrError):
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def __init__(self, branch):
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msg = "Branch %s has no commits." % branch
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BzrError.__init__(self, msg)
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class UnlistableStore(BzrError):
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def __init__(self, store):
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BzrError.__init__(self, "Store %s is not listable" % store)
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class UnlistableBranch(BzrError):
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def __init__(self, br):
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BzrError.__init__(self, "Stores for branch %s are not listable" % br)
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from bzrlib.weave import WeaveError, WeaveParentMismatch
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class TransportError(BzrError):
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"""All errors thrown by Transport implementations should derive
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def __init__(self, msg=None, orig_error=None):
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if msg is None and orig_error is not None:
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msg = str(orig_error)
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BzrError.__init__(self, msg)
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self.orig_error = orig_error
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# A set of semi-meaningful errors which can be thrown
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class TransportNotPossible(TransportError):
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"""This is for transports where a specific function is explicitly not
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possible. Such as pushing files to an HTTP server.
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class NonRelativePath(TransportError):
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"""An absolute path was supplied, that could not be decoded into
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class NoSuchFile(TransportError, IOError):
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"""A get() was issued for a file that doesn't exist."""
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# XXX: Is multiple inheritance for exceptions really needed?
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return 'no such file: ' + self.msg
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def __init__(self, msg=None, orig_error=None):
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TransportError.__init__(self, msg=msg, orig_error=orig_error)
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IOError.__init__(self, errno.ENOENT, self.msg)
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class FileExists(TransportError, OSError):
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"""An operation was attempted, which would overwrite an entry,
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but overwritting is not supported.
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mkdir() can throw this, but put() just overwites existing files.
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# XXX: Is multiple inheritance for exceptions really needed?
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def __init__(self, msg=None, orig_error=None):
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TransportError.__init__(self, msg=msg, orig_error=orig_error)
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OSError.__init__(self, errno.EEXIST, self.msg)
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class PermissionDenied(TransportError):
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"""An operation cannot succeed because of a lack of permissions."""
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class ConnectionReset(TransportError):
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"""The connection has been closed."""
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class ConflictsInTree(BzrError):
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BzrError.__init__(self, "Working tree has conflicts.")
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class SigningFailed(BzrError):
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def __init__(self, command_line):
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BzrError.__init__(self, "Failed to gpg sign data with command '%s'"
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class BzrCheckError(BzrError):
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def bailout(msg, explanation=[]):
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ex = BzrError(msg, explanation)
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trace._tracefile.write('* raising %s\n' % ex)
added
removed
bzrlib/errors.py
