"""

error.py - Mercurial exceptions

This allows us to catch exceptions at higher levels without forcing imports

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, incorporated herein by reference.

"""

# 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)