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# -*- python -*-
# -*- coding: utf-8 -*-
# Installsystems is free software: you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
# Installsystems 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 Lesser General Public License for more details.
# You should have received a copy of the GNU Lesser General Public License
# along with Installsystems. If not, see <http://www.gnu.org/licenses/>.
'''
InstallSystems Exceptions
'''
from traceback import print_tb, print_exc, format_exception_only
from sys import exc_info, stderr
class ISException(Exception):
'''
Base exception class
'''
def __init__(self, message=u"", exception=None):
self.message = unicode(message)
self.exception = None if exception is None else exc_info()
'''
Return a description of exception
'''
if self.exception is not None:
return u"%s: %s" % (self.message, self.exception[1])
'''
Print stored exception traceback and exception message
'''
# no exception, do nothing
if self.exception is None:
return
# print traceback and exception separatly to avoid recursive print of
# "Traceback (most recent call last)" from traceback.print_exception
print_tb(self.exception[2], file=fd)
fd.write("".join(format_exception_only(self.exception[0],
self.exception[1])))
# recursively call traceback print on ISException error
if isinstance(self.exception[1], ISException):
self.exception[1].print_sub_tb()
'''
Print traceback from embeded exception or current one
'''
from installsystems.printer import out
# coloring
out("#l##B#", fd=fd, endl="")
# reset color
out("#R#", fd=fd, endl="")
class ISError(ISException):
'''
Installsystems error; this exception will stop execution
'''
class ISWarning(ISException):
'''
Installsystems warning; this exception do not stop execution
'''
class InvalidSourceImage(ISError):
'''
Invalid source image errors
'''
def __init__(self, message=u"", exception=None):
ISError.__init__(self, u"Invalid source image: " + message, exception)