# error.py - Mercurial exceptions

#

# Copyright 2005-2008 Matt Mackall <mpm@selenic.com>

#

# This software may be used and distributed according to the terms of the

# GNU General Public License version 2 or any later version.

"""Mercurial exceptions.

This allows us to catch exceptions at higher levels without forcing

imports.

"""

# Do not import anything here, please

class RevlogError(Exception):

    pass

class FilteredIndexError(IndexError):

    pass

class LookupError(RevlogError, KeyError):

    def __init__(self, name, index, message):

        self.name = name

        self.index = index

        self.message = message

        if isinstance(name, str) and len(name) == 20:

            from node import short

            name = short(name)

        RevlogError.__init__(self, '%s@%s: %s' % (index, name, message))

    def __str__(self):

        return RevlogError.__str__(self)

class FilteredLookupError(LookupError):

    pass

class ManifestLookupError(LookupError):

    pass

class CommandError(Exception):

    """Exception raised on errors in parsing the command line."""

class InterventionRequired(Exception):

    """Exception raised when a command requires human intervention."""

class Abort(Exception):

    """Raised if a command needs to print an error and exit."""

    def __init__(self, *args, **kw):

        Exception.__init__(self, *args)

        self.hint = kw.get('hint')

class HookAbort(Abort):

    """raised when a validation hook fails, aborting an operation

    Exists to allow more specialized catching."""

    pass

class ConfigError(Abort):

    """Exception raised when parsing config files"""

class OutOfBandError(Exception):

    """Exception raised when a remote repo reports failure"""

class ParseError(Exception):

    """Raised when parsing config files and {rev,file}sets (msg[, pos])"""

class RepoError(Exception):

    def __init__(self, *args, **kw):

        Exception.__init__(self, *args)

        self.hint = kw.get('hint')

class RepoLookupError(RepoError):

    pass

class FilteredRepoLookupError(RepoLookupError):

    pass

class CapabilityError(RepoError):

    pass

class RequirementError(RepoError):

    """Exception raised if .hg/requires has an unknown entry."""

    pass

class LockError(IOError):

    def __init__(self, errno, strerror, filename, desc):

        IOError.__init__(self, errno, strerror, filename)

        self.desc = desc

class LockHeld(LockError):

    def __init__(self, errno, filename, desc, locker):

        LockError.__init__(self, errno, 'Lock held', filename, desc)

        self.locker = locker

class LockUnavailable(LockError):

    pass

class ResponseError(Exception):

    """Raised to print an error with part of output and exit."""

class UnknownCommand(Exception):

    """Exception raised if command is not in the command table."""

class AmbiguousCommand(Exception):

    """Exception raised if command shortcut matches more than one command."""

# derived from KeyboardInterrupt to simplify some breakout code

class SignalInterrupt(KeyboardInterrupt):

    """Exception raised on SIGTERM and SIGHUP."""

class SignatureError(Exception):

    pass

class PushRaced(RuntimeError):

    """An exception raised during unbundling that indicate a push race"""

# bundle2 related errors

class BundleValueError(ValueError):

    """error raised when bundle2 cannot be processed"""

class UnsupportedPartError(BundleValueError):

    def __init__(self, parttype=None, params=()):

        self.parttype = parttype

        self.params = params

        if self.parttype is None:

            msg = 'Stream Parameter'

        else:

            msg = parttype

        if self.params:

            msg = '%s - %s' % (msg, ', '.join(self.params))

        ValueError.__init__(self, msg)

class ReadOnlyPartError(RuntimeError):

    """error raised when code tries to alter a part being generated"""

    pass

class CensoredNodeError(RevlogError):

    """error raised when content verification fails on a censored node"""

    def __init__(self, filename, node):

        from node import short

        RevlogError.__init__(self, '%s:%s' % (filename, short(node)))