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To ensure interoperability when clones disagree about which file nodes are censored, a restriction is made on deltas based on censored nodes. Any such delta must replace the full text of the base in a single patch. If the recipient of a delta considers the base to be censored and the delta is not in the expected form, the recipient must reject it, as it can't know if the source has also censored the base. For background and broader design of the censorship feature, see: http://mercurial.selenic.com/wiki/CensorPlan
152 lines
4.4 KiB
Python
152 lines
4.4 KiB
Python
# 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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# Do not import anything here, please
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class RevlogError(Exception):
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pass
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class FilteredIndexError(IndexError):
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pass
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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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self.message = 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 __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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class InterventionRequired(Exception):
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"""Exception raised when a command requires human intervention."""
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class Abort(Exception):
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"""Raised if a command needs to print an error and exit."""
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def __init__(self, *args, **kw):
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Exception.__init__(self, *args)
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self.hint = kw.get('hint')
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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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pass
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class ConfigError(Abort):
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"""Exception raised when parsing config files"""
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class OutOfBandError(Exception):
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"""Exception raised when a remote repo reports failure"""
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class ParseError(Exception):
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"""Raised when parsing config files and {rev,file}sets (msg[, pos])"""
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class RepoError(Exception):
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def __init__(self, *args, **kw):
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Exception.__init__(self, *args)
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self.hint = kw.get('hint')
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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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pass
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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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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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class ResponseError(Exception):
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"""Raised to print an error with part of output and exit."""
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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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class AmbiguousCommand(Exception):
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"""Exception raised if command shortcut matches more than one command."""
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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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pass
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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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# 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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class UnsupportedPartError(BundleValueError):
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def __init__(self, parttype=None, params=()):
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self.parttype = parttype
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self.params = params
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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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if self.params:
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msg = '%s - %s' % (msg, ', '.join(self.params))
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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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pass
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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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def __init__(self, filename, node):
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from node import short
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RevlogError.__init__(self, '%s:%s' % (filename, short(node)))
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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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