# 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 LookupError(RevlogError, KeyError):

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

        self.name = name

        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 CommandError(Exception):

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

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 ConfigError(Abort):

    'Exception raised when parsing config files'

class ParseError(Exception):

    'Exception raised when parsing config files (msg[, pos])'

class RepoError(Exception):

    pass

class RepoLookupError(RepoError):

    pass

class CapabilityError(RepoError):

    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