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# Copyright (C) 2008 Canonical Ltd
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
"""Exception classes for fastimport"""
# Prefix to messages to show location information
_LOCATION_FMT = "line %(lineno)d: "
# ImportError is heavily based on BzrError
class ImportError(StandardError):
"""The base exception class for all import processing exceptions."""
_fmt = "Unknown Import Error"
def __init__(self, msg=None, **kwds):
StandardError.__init__(self)
if msg is not None:
self._preformatted_string = msg
else:
self._preformatted_string = None
for key, value in kwds.items():
setattr(self, key, value)
def _format(self):
s = getattr(self, '_preformatted_string', None)
if s is not None:
# contains a preformatted message
return s
try:
fmt = self._fmt
if fmt:
d = dict(self.__dict__)
s = fmt % d
# __str__() should always return a 'str' object
# never a 'unicode' object.
return s
except (AttributeError, TypeError, NameError, ValueError, KeyError), e:
return 'Unprintable exception %s: dict=%r, fmt=%r, error=%r' \
% (self.__class__.__name__,
self.__dict__,
getattr(self, '_fmt', None),
e)
def __unicode__(self):
u = self._format()
if isinstance(u, str):
# Try decoding the str using the default encoding.
u = unicode(u)
elif not isinstance(u, unicode):
# Try to make a unicode object from it, because __unicode__ must
# return a unicode object.
u = unicode(u)
return u
def __str__(self):
s = self._format()
if isinstance(s, unicode):
s = s.encode('utf8')
else:
# __str__ must return a str.
s = str(s)
return s
def __repr__(self):
return '%s(%s)' % (self.__class__.__name__, str(self))
def __eq__(self, other):
if self.__class__ is not other.__class__:
return NotImplemented
return self.__dict__ == other.__dict__
class ParsingError(ImportError):
"""The base exception class for all import processing exceptions."""
_fmt = _LOCATION_FMT + "Unknown Import Parsing Error"
def __init__(self, lineno):
ImportError.__init__(self)
self.lineno = lineno
class MissingBytes(ParsingError):
"""Raised when EOF encountered while expecting to find more bytes."""
_fmt = (_LOCATION_FMT + "Unexpected EOF - expected %(expected)d bytes,"
" found %(found)d")
def __init__(self, lineno, expected, found):
ParsingError.__init__(self, lineno)
self.expected = expected
self.found = found
class MissingTerminator(ParsingError):
"""Raised when EOF encountered while expecting to find a terminator."""
_fmt = (_LOCATION_FMT +
"Unexpected EOF - expected '%(terminator)s' terminator")
def __init__(self, lineno, terminator):
ParsingError.__init__(self, lineno)
self.terminator = terminator
class InvalidCommand(ParsingError):
"""Raised when an unknown command found."""
_fmt = (_LOCATION_FMT + "Invalid command '%(cmd)s'")
def __init__(self, lineno, cmd):
ParsingError.__init__(self, lineno)
self.cmd = cmd
class MissingSection(ParsingError):
"""Raised when a section is required in a command but not present."""
_fmt = (_LOCATION_FMT + "Command %(cmd)s is missing section %(section)s")
def __init__(self, lineno, cmd, section):
ParsingError.__init__(self, lineno)
self.cmd = cmd
self.section = section
class BadFormat(ParsingError):
"""Raised when a section is formatted incorrectly."""
_fmt = (_LOCATION_FMT + "Bad format for section %(section)s in "
"command %(cmd)s: found '%(text)s'")
def __init__(self, lineno, cmd, section, text):
ParsingError.__init__(self, lineno)
self.cmd = cmd
self.section = section
self.text = text
class InvalidTimezone(ParsingError):
"""Raised when converting a string timezone to a seconds offset."""
_fmt = (_LOCATION_FMT +
"Timezone %(timezone)r could not be converted.%(reason)s")
def __init__(self, lineno, timezone, reason=None):
ParsingError.__init__(self, lineno)
self.timezone = timezone
if reason:
self.reason = ' ' + reason
else:
self.reason = ''
class UnknownDateFormat(ImportError):
"""Raised when an unknown date format is given."""
_fmt = ("Unknown date format '%(format)s'")
def __init__(self, format):
ImportError.__init__(self)
self.format = format
class MissingHandler(ImportError):
"""Raised when a processor can't handle a command."""
_fmt = ("Missing handler for command %(cmd)s")
def __init__(self, cmd):
ImportError.__init__(self)
self.cmd = cmd
class UnknownParameter(ImportError):
"""Raised when an unknown parameter is passed to a processor."""
_fmt = ("Unknown parameter - '%(param)s' not in %(knowns)s")
def __init__(self, param, knowns):
ImportError.__init__(self)
self.param = param
self.knowns = knowns
class BadRepositorySize(ImportError):
"""Raised when the repository has an incorrect number of revisions."""
_fmt = ("Bad repository size - %(found)d revisions found, "
"%(expected)d expected")
def __init__(self, expected, found):
ImportError.__init__(self)
self.expected = expected
self.found = found
class BadRestart(ImportError):
"""Raised when the import stream and id-map do not match up."""
_fmt = ("Bad restart - attempted to skip commit %(commit_id)s "
"but matching revision-id is unknown")
def __init__(self, commit_id):
ImportError.__init__(self)
self.commit_id = commit_id
class UnknownFeature(ImportError):
"""Raised when an unknown feature is given in the input stream."""
_fmt = ("Unknown feature '%(feature)s' - try a later importer or "
"an earlier data format")
def __init__(self, feature):
ImportError.__init__(self)
self.feature = feature
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