129 lines
4.2 KiB
Python
129 lines
4.2 KiB
Python
#
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# Copyright (c) 2012-2015 Hewlett-Packard Development Company, L.P.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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# implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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from abc import ABCMeta
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from abc import abstractmethod
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from collections import Sequence
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from git_upstream.lib.searchers import DiscardDuplicateGerritChangeId
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from git_upstream.lib.searchers import DroppedCommitFilter
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from git_upstream.lib.searchers import NoMergeCommitFilter
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from git_upstream.lib.searchers import ReverseCommitFilter
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from git_upstream.lib.searchers import SupersededCommitFilter
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from git_upstream.lib.searchers import UpstreamMergeBaseSearcher
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from git_upstream.lib.utils import GitMixin
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class ImportStrategiesFactory(object):
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__strategies = None
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@classmethod
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def create_strategy(cls, type, *args, **kwargs):
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if type in cls.list_strategies():
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return cls.__strategies[type](*args, **kwargs)
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else:
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raise RuntimeError("No class implements the requested strategy: "
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"{0}".format(type))
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@classmethod
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def list_strategies(cls):
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cls.__strategies = {
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subclass._strategy: subclass
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for subclass in LocateChangesStrategy.__subclasses__()
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if subclass._strategy}
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return cls.__strategies.keys()
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class LocateChangesStrategy(GitMixin, Sequence):
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"""Base locate changes strategy class
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Needs to be extended with the specific strategy on how to handle changes
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that are not yet upstream.
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"""
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__metaclass__ = ABCMeta
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@abstractmethod
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def __init__(self, git=None, *args, **kwargs):
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"""Initialize an empty filters list"""
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self.data = None
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self.filters = []
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super(LocateChangesStrategy, self).__init__(*args, **kwargs)
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def __getitem__(self, key):
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if not self.data:
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self.data = self._popdata()
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return self.data[key]
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def __len__(self):
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if not self.data:
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self.data = self._popdata()
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return len(self.data)
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@classmethod
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def get_strategy_name(cls):
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return cls._strategy
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def filtered_iter(self):
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# chain the filters as generators so that we don't need to allocate new
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# lists for each step in the filter chain.
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commit_list = self
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for f in self.filters:
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commit_list = f.filter(commit_list)
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return commit_list
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def filtered_list(self):
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return list(self.filtered_iter())
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def _popdata(self):
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"""Should return the list of commits from the searcher object"""
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return self.searcher.list()
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class LocateChangesWalk(LocateChangesStrategy):
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_strategy = "drop"
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def __init__(self, branch="HEAD", upstream="upstream/master",
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search_refs=None, *args, **kwargs):
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if not search_refs:
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search_refs = []
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search_refs.insert(0, upstream)
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self.searcher = UpstreamMergeBaseSearcher(branch=branch,
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patterns=search_refs)
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self.upstream = upstream
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super(LocateChangesWalk, self).__init__(*args, **kwargs)
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def filtered_iter(self):
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# may wish to make class used to remove duplicate objects configurable
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# through git-upstream specific 'git config' settings
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self.filters.append(
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DiscardDuplicateGerritChangeId(self.upstream,
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limit=self.searcher.commit))
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self.filters.append(NoMergeCommitFilter())
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self.filters.append(ReverseCommitFilter())
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self.filters.append(DroppedCommitFilter())
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self.filters.append(
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SupersededCommitFilter(self.upstream,
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limit=self.searcher.commit))
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return super(LocateChangesWalk, self).filtered_iter()
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