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#!/usr/bin/env python3
#
# Copyright (C) 2016 Codethink Limited
#
# This program 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 2 of the License, or (at your option) any later version.
#
# This library 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 this library. If not, see <http://www.gnu.org/licenses/>.
#
# Authors:
# Tristan Van Berkom <tristan.vanberkom@codethink.co.uk>
from enum import Enum
class PluginError(Exception):
"""Raised on plugin related errors.
This exception is raised when a plugin was not loaded correctly,
or when the appropriate plugin could not be found to implement
a given :class:`.Source` or :class:`.Element`
"""
pass
class LoadErrorReason(Enum):
"""Describes the reason why a :class:`.LoadError` was raised.
"""
MISSING_FILE = 1
"""A file was not found."""
INVALID_YAML = 2
"""The parsed data was not valid YAML."""
INVALID_DATA = 3
"""Data was malformed, a value was not of the expected type, etc"""
ILLEGAL_COMPOSITE = 4
"""Something from a variant or include or user configuration file was
incorrect. Either by overriding a value with a new differently typed
value or by overwriting some named value when that was not allowed.
"""
VARIANT_DISAGREEMENT = 5
"""Two elements in the project depend on the same element but disagree
on their variant. No alternative combination of element variants was found
when loading the project.
"""
CIRCULAR_DEPENDENCY = 6
"""An circular dependency chain was detected"""
class LoadError(Exception):
"""Raised while loading some YAML.
This exception is raised when loading or parsing YAML, or when
interpreting project YAML
"""
def __init__(self, reason, message):
super(LoadError, self).__init__(message)
self.reason = reason
"""The :class:`.LoadErrorReason` for which this exception was raised
"""
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