52 lines
1.7 KiB
Python
52 lines
1.7 KiB
Python
# Copyright 2018 3YOURMIND GmbH
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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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# http://www.apache.org/licenses/LICENSE-2.0
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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 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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import hashlib
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import os
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import pickle
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from django_migration_linter.utils import split_path, compose_migration_path
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class Cache(dict):
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def __init__(self, django_folder, cache_path):
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self.django_folder = django_folder
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project_name = split_path(django_folder)[-2]
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self.filename = os.path.join(cache_path, "{0}.pickle".format(project_name))
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if not os.path.exists(os.path.dirname(self.filename)):
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os.makedirs(os.path.dirname(self.filename))
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super(Cache, self).__init__()
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def load(self):
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try:
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with open(self.filename, "rb") as f:
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tmp_dict = pickle.load(f)
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self.update(tmp_dict)
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except IOError:
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pass
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def save(self):
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with open(self.filename, "wb") as f:
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pickle.dump(self, f, protocol=2)
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def md5(self, app_name, migration):
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path = compose_migration_path(self.django_folder, app_name, migration)
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hash_md5 = hashlib.md5()
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with open(path, "rb") as f:
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for chunk in iter(lambda: f.read(4096), b""):
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hash_md5.update(chunk)
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return hash_md5.hexdigest()
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