mercurial/error.py
author Augie Fackler <augie@google.com>
Thu, 28 May 2020 16:16:13 -0400
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parent 43506 9f70512ae2cf
child 45151 e429e7c801b2
permissions -rw-r--r--
filemerge: add __bytes__ for absentfilectx This will at _least_ aid some upcoming debugging. Differential Revision: https://phab.mercurial-scm.org/D8592
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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('hint', None)
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        super(Hint, self).__init__(*args, **kw)
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class StorageError(Hint, Exception):
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    """Raised when an error occurs in a storage layer.
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    Usually subclassed by a storage-specific exception.
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    """
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    __bytes__ = _tobytes
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class RevlogError(StorageError):
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    __bytes__ = _tobytes
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class SidedataHashError(RevlogError):
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    def __init__(self, key, expected, got):
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        self.sidedatakey = key
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        self.expecteddigest = expected
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        self.actualdigest = got
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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, bytes) 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, b'%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 AmbiguousPrefixLookupError(LookupError):
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    pass
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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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    if pycompat.ispy3:
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        def __str__(self):
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            # the output would be unreadable if the message was translated,
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            # but do not replace it with encoding.strfromlocal(), which
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            # may raise another exception.
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            return pycompat.sysstr(self.__bytes__())
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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, _(b'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, _(b"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 = b' '.join(self.recordtypes)
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        Abort.__init__(
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            self,
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            _(b'unsupported merge state records: %s') % s,
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            hint=_(
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                b'see https://mercurial-scm.org/wiki/MergeStateRecords for '
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                b'more information'
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            ),
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        )
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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, b'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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   303
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    def __init__(self, msg, *args, **kwargs):
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        # On Python 3, turn the message back into a string since this is
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        # an internal-only error that won't be printed except in a
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        # stack traces.
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   308
        msg = pycompat.sysstr(msg)
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        super(ProgrammingError, self).__init__(msg, *args, **kwargs)
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    __bytes__ = _tobytes
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   313
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   314
class WdirUnsupported(Exception):
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    """An exception which is raised when 'wdir()' is not supported"""
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   316
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    __bytes__ = _tobytes
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   320
# 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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   323
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    __bytes__ = _tobytes
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   325
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   326
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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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   330
        self.params = params
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        self.values = values
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   332
        if self.parttype is None:
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   333
            msg = b'Stream Parameter'
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   334
        else:
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   335
            msg = parttype
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   336
        entries = self.params
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   337
        if self.params and self.values:
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   338
            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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   343
                    entries.append(val)
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   344
                else:
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   345
                    entries.append(b"%s=%r" % (par, pycompat.maybebytestr(val)))
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   346
        if entries:
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   347
            msg = b'%s - %s' % (msg, b', '.join(entries))
21747
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   348
        ValueError.__init__(self, msg)
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   350
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   351
class ReadOnlyPartError(RuntimeError):
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   352
    """error raised when code tries to alter a part being generated"""
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   353
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    __bytes__ = _tobytes
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   356
25484
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diff changeset
   357
class PushkeyFailed(Abort):
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   358
    """error raised when a pushkey part failed to update a value"""
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   359
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   360
    def __init__(
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   361
        self, partid, namespace=None, key=None, new=None, old=None, ret=None
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   362
    ):
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diff changeset
   363
        self.partid = partid
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diff changeset
   364
        self.namespace = namespace
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diff changeset
   365
        self.key = key
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diff changeset
   366
        self.new = new
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diff changeset
   367
        self.old = old
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diff changeset
   368
        self.ret = ret
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diff changeset
   369
        # no i18n expected to be processed into a better message
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diff changeset
   370
        Abort.__init__(
43077
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diff changeset
   371
            self, b'failed to update value for "%s/%s"' % (namespace, key)
43076
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diff changeset
   372
        )
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   373
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diff changeset
   374
39777
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Gregory Szorc <gregory.szorc@gmail.com>
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   375
class CensoredNodeError(StorageError):
24190
903c7e8c97ad changegroup: emit full-replacement deltas if either revision is censored
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parents: 24137
diff changeset
   376
    """error raised when content verification fails on a censored node
22595
244478687edd error: add CensoredNodeError, will be thrown when content deliberately erased
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parents: 22359
diff changeset
   377
24190
903c7e8c97ad changegroup: emit full-replacement deltas if either revision is censored
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diff changeset
   378
    Also contains the tombstone data substituted for the uncensored data.
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diff changeset
   379
    """
903c7e8c97ad changegroup: emit full-replacement deltas if either revision is censored
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diff changeset
   380
903c7e8c97ad changegroup: emit full-replacement deltas if either revision is censored
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diff changeset
   381
    def __init__(self, filename, node, tombstone):
25945
147bd9e238a1 error: use absolute_import
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parents: 25484
diff changeset
   382
        from .node import short
43076
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diff changeset
   383
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diff changeset
   384
        StorageError.__init__(self, b'%s:%s' % (filename, short(node)))
24190
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parents: 24137
diff changeset
   385
        self.tombstone = tombstone
24120
a450e0a2ba0a revlog: in addgroup, reject ill-formed deltas based on censored nodes
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parents: 24040
diff changeset
   386
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diff changeset
   387
39777
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parents: 39776
diff changeset
   388
class CensoredBaseError(StorageError):
24120
a450e0a2ba0a revlog: in addgroup, reject ill-formed deltas based on censored nodes
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parents: 24040
diff changeset
   389
    """error raised when a delta is rejected because its base is censored
a450e0a2ba0a revlog: in addgroup, reject ill-formed deltas based on censored nodes
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parents: 24040
diff changeset
   390
a450e0a2ba0a revlog: in addgroup, reject ill-formed deltas based on censored nodes
Mike Edgar <adgar@google.com>
parents: 24040
diff changeset
   391
    A delta based on a censored revision must be formed as single patch
a450e0a2ba0a revlog: in addgroup, reject ill-formed deltas based on censored nodes
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parents: 24040
diff changeset
   392
    operation which replaces the entire base with new content. This ensures
a450e0a2ba0a revlog: in addgroup, reject ill-formed deltas based on censored nodes
Mike Edgar <adgar@google.com>
parents: 24040
diff changeset
   393
    the delta may be applied by clones which have not censored the base.
a450e0a2ba0a revlog: in addgroup, reject ill-formed deltas based on censored nodes
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parents: 24040
diff changeset
   394
    """
26640
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   395
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   396
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   397
class InvalidBundleSpecification(Exception):
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   398
    """error raised when a bundle specification is invalid.
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   399
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   400
    This is used for syntax errors as opposed to support errors.
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   401
    """
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Augie Fackler <augie@google.com>
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diff changeset
   402
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6df193b5c437 py3: implement __bytes__() on most of our exception classes
Yuya Nishihara <yuya@tcha.org>
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   403
    __bytes__ = _tobytes
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b13fdcc4e700 exchange: refactor bundle specification parsing
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parents: 26438
diff changeset
   404
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   405
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   406
class UnsupportedBundleSpecification(Exception):
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   407
    """error raised when a bundle specification is not supported."""
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diff changeset
   408
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   409
    __bytes__ = _tobytes
29536
b17a6e3cd2ac shelve: make unshelve be able to abort in any case
Kostia Balytskyi <ikostia@fb.com>
parents: 29510
diff changeset
   410
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   411
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   412
class CorruptedState(Exception):
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   413
    """error raised when a command is not able to read its state from file"""
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diff changeset
   414
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   415
    __bytes__ = _tobytes
32002
bf855efe5664 httppeer: wrap HTTPResponse.read() globally
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parents: 31959
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   416
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   417
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   418
class PeerTransportError(Abort):
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   419
    """Transport-level I/O error when communicating with a peer repo."""
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parents: 34251
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   420
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   421
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   422
class InMemoryMergeConflictsError(Exception):
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   423
    """Exception raised when merge conflicts arose during an in-memory merge."""
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diff changeset
   424
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   425
    __bytes__ = _tobytes
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07b58266bce3 wireprotov2: implement commands as a generator of objects
Gregory Szorc <gregory.szorc@gmail.com>
parents: 38841
diff changeset
   426
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   427
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   428
class WireprotoCommandError(Exception):
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   429
    """Represents an error during execution of a wire protocol command.
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   430
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   431
    Should only be thrown by wire protocol version 2 commands.
07b58266bce3 wireprotov2: implement commands as a generator of objects
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diff changeset
   432
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   433
    The error is a formatter string and an optional iterable of arguments.
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   434
    """
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   435
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   436
    def __init__(self, message, args=None):
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   437
        self.message = message
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   438
        self.messageargs = args