view mercurial/error.py @ 25894:54f9561088c7 stable

histedit: backout ebb5bb9bc32e

The faulty changeset use obsolescence marker to roll the repository back on
--abort. This is a problematic approach because --abort should be as close as an
actually transaction rollback as possible stripping all created data from the
repository (cf `hg rebase --abort` stripping all created changesets). Instead
ebb5bb9bc32e made all content created during the aborted histedit still
available in the repository adding obsolescence marker to make them hidden. This
will cause trouble to evolution user as a re-run of the same histedit (with
success) will likely result in the very same node to be "recreated" while
obsolescence marker would be in place for them. And canceling an obsoletion is
still a fairly complicated process.

This also rollback using obsmarkers instead of strip to clean up temporary node
on successful histedit run because the two change were not split in separated
changeset. Rolling that part back does not have significant consequence a will
have to be resubmitted independently

# error.py - Mercurial exceptions
#
# Copyright 2005-2008 Matt Mackall <[e-mail]>
#
# 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 HintException(Exception):
    def __init__(self, *args, **kw):
        Exception.__init__(self, *args)
        self.hint = kw.get('hint')

class RevlogError(HintException):
    pass

class FilteredIndexError(IndexError):
    pass

class LookupError(RevlogError, KeyError):
    def __init__(self, name, index, message):
        self.name = name
        self.index = index
        # this can't be called 'message' because at least some installs of
        # Python 2.6+ complain about the 'message' property being deprecated
        self.lookupmessage = 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(HintException):
    """Raised if a command needs to print an error and exit."""
    pass

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"""

    def __init__(self, *args, **kw):
        Exception.__init__(self, *args)
        self.hint = kw.get('hint')

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

class UnknownIdentifier(ParseError):
    """Exception raised when a {rev,file}set references an unknown identifier"""

    def __init__(self, function, symbols):
        from i18n import _
        ParseError.__init__(self, _("unknown identifier: %s") % function)
        self.function = function
        self.symbols = symbols

class RepoError(HintException):
    pass

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 PushkeyFailed(Abort):
    """error raised when a pushkey part failed to update a value"""

    def __init__(self, partid, namespace=None, key=None, new=None, old=None,
                 ret=None):
        self.partid = partid
        self.namespace = namespace
        self.key = key
        self.new = new
        self.old = old
        self.ret = ret
        # no i18n expected to be processed into a better message
        Abort.__init__(self, 'failed to update value for "%s/%s"'
                       % (namespace, key))

class CensoredNodeError(RevlogError):
    """error raised when content verification fails on a censored node

    Also contains the tombstone data substituted for the uncensored data.
    """

    def __init__(self, filename, node, tombstone):
        from node import short
        RevlogError.__init__(self, '%s:%s' % (filename, short(node)))
        self.tombstone = tombstone

class CensoredBaseError(RevlogError):
    """error raised when a delta is rejected because its base is censored

    A delta based on a censored revision must be formed as single patch
    operation which replaces the entire base with new content. This ensures
    the delta may be applied by clones which have not censored the base.
    """