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#!/usr/bin/env python
# Copyright 2014-2015 Lars Wirzenius
#
# 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 3 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/>.
#
# =*= License: GPL-3+ =*=
# This module contains a fair bit of Python magic. Tread carefully.
# Like all the worst magic, it has no automated tests, either. Treat
# this module as if it were a sleeping dragon. Do not meddle in the
# affairs of dragons, for they are cranky and you are good with
# ketchup.
import imp
import inspect
import os
import obnamlib
def find_structured_errors(top_module, plugin_manager):
modules = _find_modules(top_module)
modules += _find_plugin_modules(plugin_manager)
return _find_errors(modules)
def _find_modules(top_module):
result = set()
queue = [top_module]
while queue:
module = queue.pop()
if module not in result:
result.add(module)
queue.extend(_get_submodules(module))
return list(result)
def _get_submodules(module):
objs = [getattr(module, name) for name in dir(module)]
return [x for x in objs if inspect.ismodule(x)]
def _find_plugin_modules(plugin_manager):
modules = []
for filename in plugin_manager.plugin_files:
module_name, _ = os.path.splitext(os.path.basename(filename))
with open(filename, 'rb') as f:
module = imp.load_module(
module_name, f, filename, ('.py', 'r', imp.PY_SOURCE))
modules.append(module)
return modules
def _find_errors(modules):
result = set()
for module in modules:
for name in dir(module):
obj = getattr(module, name)
if _is_structured_error(obj):
result.add(obj)
return list(result)
def _is_structured_error(obj):
return (type(obj) is type and
issubclass(obj, obnamlib.StructuredError) and
hasattr(obj, 'msg'))
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