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# error.py - Mercurial exceptions
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#
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# Copyright 2005-2008 Matt Mackall <mpm@selenic.com>
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#
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# This software may be used and distributed according to the terms of the
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# GNU General Public License version 2 or any later version.
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"""Mercurial exceptions.
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This allows us to catch exceptions at higher levels without forcing
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imports.
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"""
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from __future__ import absolute_import
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# Do not import anything but pycompat here, please
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from . import pycompat
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def _tobytes(exc):
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"""Byte-stringify exception in the same way as BaseException_str()"""
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if not exc.args:
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return b''
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if len(exc.args) == 1:
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return pycompat.bytestr(exc.args[0])
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return b'(%s)' % b', '.join(b"'%s'" % pycompat.bytestr(a) for a in exc.args)
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class Hint(object):
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"""Mix-in to provide a hint of an error
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This should come first in the inheritance list to consume a hint and
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pass remaining arguments to the exception class.
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"""
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def __init__(self, *args, **kw):
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self.hint = kw.pop(r'hint', None)
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super(Hint, self).__init__(*args, **kw)
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class RevlogError(Hint, Exception):
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__bytes__ = _tobytes
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class FilteredIndexError(IndexError):
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__bytes__ = _tobytes
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class LookupError(RevlogError, KeyError):
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def __init__(self, name, index, message):
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self.name = name
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self.index = index
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# this can't be called 'message' because at least some installs of
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# Python 2.6+ complain about the 'message' property being deprecated
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self.lookupmessage = message
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if isinstance(name, str) and len(name) == 20:
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from .node import short
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name = short(name)
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RevlogError.__init__(self, '%s@%s: %s' % (index, name, message))
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def __bytes__(self):
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return RevlogError.__bytes__(self)
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def __str__(self):
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return RevlogError.__str__(self)
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class FilteredLookupError(LookupError):
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pass
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class ManifestLookupError(LookupError):
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pass
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class CommandError(Exception):
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"""Exception raised on errors in parsing the command line."""
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__bytes__ = _tobytes
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class InterventionRequired(Hint, Exception):
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"""Exception raised when a command requires human intervention."""
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__bytes__ = _tobytes
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class Abort(Hint, Exception):
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"""Raised if a command needs to print an error and exit."""
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__bytes__ = _tobytes
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class HookLoadError(Abort):
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"""raised when loading a hook fails, aborting an operation
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Exists to allow more specialized catching."""
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class HookAbort(Abort):
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"""raised when a validation hook fails, aborting an operation
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Exists to allow more specialized catching."""
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class ConfigError(Abort):
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"""Exception raised when parsing config files"""
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class UpdateAbort(Abort):
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"""Raised when an update is aborted for destination issue"""
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class MergeDestAbort(Abort):
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"""Raised when an update is aborted for destination issues"""
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class NoMergeDestAbort(MergeDestAbort):
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"""Raised when an update is aborted because there is nothing to merge"""
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class ManyMergeDestAbort(MergeDestAbort):
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"""Raised when an update is aborted because destination is ambiguous"""
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class ResponseExpected(Abort):
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"""Raised when an EOF is received for a prompt"""
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def __init__(self):
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from .i18n import _
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Abort.__init__(self, _('response expected'))
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class OutOfBandError(Hint, Exception):
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"""Exception raised when a remote repo reports failure"""
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__bytes__ = _tobytes
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class ParseError(Hint, Exception):
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"""Raised when parsing config files and {rev,file}sets (msg[, pos])"""
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__bytes__ = _tobytes
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class PatchError(Exception):
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__bytes__ = _tobytes
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class UnknownIdentifier(ParseError):
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"""Exception raised when a {rev,file}set references an unknown identifier"""
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def __init__(self, function, symbols):
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from .i18n import _
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ParseError.__init__(self, _("unknown identifier: %s") % function)
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self.function = function
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self.symbols = symbols
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class RepoError(Hint, Exception):
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__bytes__ = _tobytes
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class RepoLookupError(RepoError):
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pass
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class FilteredRepoLookupError(RepoLookupError):
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pass
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class CapabilityError(RepoError):
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pass
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class RequirementError(RepoError):
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"""Exception raised if .hg/requires has an unknown entry."""
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class StdioError(IOError):
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"""Raised if I/O to stdout or stderr fails"""
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def __init__(self, err):
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IOError.__init__(self, err.errno, err.strerror)
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# no __bytes__() because error message is derived from the standard IOError
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class UnsupportedMergeRecords(Abort):
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def __init__(self, recordtypes):
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from .i18n import _
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self.recordtypes = sorted(recordtypes)
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s = ' '.join(self.recordtypes)
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Abort.__init__(
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self, _('unsupported merge state records: %s') % s,
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hint=_('see https://mercurial-scm.org/wiki/MergeStateRecords for '
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'more information'))
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class UnknownVersion(Abort):
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"""generic exception for aborting from an encounter with an unknown version
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"""
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def __init__(self, msg, hint=None, version=None):
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self.version = version
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super(UnknownVersion, self).__init__(msg, hint=hint)
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class LockError(IOError):
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def __init__(self, errno, strerror, filename, desc):
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IOError.__init__(self, errno, strerror, filename)
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self.desc = desc
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# no __bytes__() because error message is derived from the standard IOError
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class LockHeld(LockError):
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def __init__(self, errno, filename, desc, locker):
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LockError.__init__(self, errno, 'Lock held', filename, desc)
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self.locker = locker
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class LockUnavailable(LockError):
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pass
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# LockError is for errors while acquiring the lock -- this is unrelated
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class LockInheritanceContractViolation(RuntimeError):
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__bytes__ = _tobytes
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class ResponseError(Exception):
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"""Raised to print an error with part of output and exit."""
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__bytes__ = _tobytes
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class UnknownCommand(Exception):
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"""Exception raised if command is not in the command table."""
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__bytes__ = _tobytes
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class AmbiguousCommand(Exception):
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"""Exception raised if command shortcut matches more than one command."""
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__bytes__ = _tobytes
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# derived from KeyboardInterrupt to simplify some breakout code
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class SignalInterrupt(KeyboardInterrupt):
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"""Exception raised on SIGTERM and SIGHUP."""
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class SignatureError(Exception):
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__bytes__ = _tobytes
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class PushRaced(RuntimeError):
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"""An exception raised during unbundling that indicate a push race"""
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__bytes__ = _tobytes
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class ProgrammingError(Hint, RuntimeError):
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"""Raised if a mercurial (core or extension) developer made a mistake"""
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__bytes__ = _tobytes
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class WdirUnsupported(Exception):
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"""An exception which is raised when 'wdir()' is not supported"""
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__bytes__ = _tobytes
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# bundle2 related errors
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class BundleValueError(ValueError):
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"""error raised when bundle2 cannot be processed"""
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__bytes__ = _tobytes
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class BundleUnknownFeatureError(BundleValueError):
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def __init__(self, parttype=None, params=(), values=()):
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self.parttype = parttype
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self.params = params
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self.values = values
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if self.parttype is None:
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msg = 'Stream Parameter'
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else:
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msg = parttype
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entries = self.params
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if self.params and self.values:
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assert len(self.params) == len(self.values)
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entries = []
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for idx, par in enumerate(self.params):
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val = self.values[idx]
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if val is None:
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entries.append(val)
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else:
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entries.append("%s=%r" % (par, val))
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if entries:
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msg = '%s - %s' % (msg, ', '.join(entries))
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ValueError.__init__(self, msg)
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class ReadOnlyPartError(RuntimeError):
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"""error raised when code tries to alter a part being generated"""
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__bytes__ = _tobytes
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class PushkeyFailed(Abort):
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"""error raised when a pushkey part failed to update a value"""
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def __init__(self, partid, namespace=None, key=None, new=None, old=None,
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ret=None):
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self.partid = partid
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self.namespace = namespace
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self.key = key
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self.new = new
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self.old = old
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self.ret = ret
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# no i18n expected to be processed into a better message
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Abort.__init__(self, 'failed to update value for "%s/%s"'
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% (namespace, key))
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class CensoredNodeError(RevlogError):
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"""error raised when content verification fails on a censored node
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Also contains the tombstone data substituted for the uncensored data.
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"""
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def __init__(self, filename, node, tombstone):
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from .node import short
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RevlogError.__init__(self, '%s:%s' % (filename, short(node)))
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self.tombstone = tombstone
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class CensoredBaseError(RevlogError):
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"""error raised when a delta is rejected because its base is censored
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A delta based on a censored revision must be formed as single patch
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operation which replaces the entire base with new content. This ensures
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the delta may be applied by clones which have not censored the base.
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"""
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class InvalidBundleSpecification(Exception):
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"""error raised when a bundle specification is invalid.
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This is used for syntax errors as opposed to support errors.
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"""
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__bytes__ = _tobytes
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class UnsupportedBundleSpecification(Exception):
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"""error raised when a bundle specification is not supported."""
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__bytes__ = _tobytes
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class CorruptedState(Exception):
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"""error raised when a command is not able to read its state from file"""
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__bytes__ = _tobytes
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class PeerTransportError(Abort):
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"""Transport-level I/O error when communicating with a peer repo."""
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