139 lines
4.9 KiB
Python
Executable File
139 lines
4.9 KiB
Python
Executable File
#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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# Copyright (c) 2021 Huawei Device Co., Ltd.
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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 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 shutil
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import os
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import hashlib
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import json
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import http.client as client
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from . import build_utils
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class Storage():
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def __init__(self):
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pass
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@classmethod
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def retrieve_object(cls, cache_artifact, obj):
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possible_dir_cache_artifact = '{}.directory'.format(cache_artifact)
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if os.path.exists(cache_artifact):
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os.makedirs(os.path.dirname(obj), exist_ok=True)
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shutil.copyfile(cache_artifact, obj)
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os.utime(cache_artifact)
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if pycache_debug_enable:
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print('Retrieve {} from cache'.format(obj))
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elif os.path.exists(possible_dir_cache_artifact):
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# Extract zip archive if it's cache artifact for directory.
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os.makedirs(obj, exist_ok=True)
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build_utils.extract_all(possible_dir_cache_artifact,
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obj,
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no_clobber=False)
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os.utime(possible_dir_cache_artifact)
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if pycache_debug_enable:
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print('Extract {} from cache'.format(obj))
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else:
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if pycache_debug_enable:
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print('Failed to retrieve {} from cache'.format(obj))
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return 0
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return 1
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@classmethod
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def add_object(cls, cache_artifact, obj):
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cache_dir = os.path.dirname(cache_artifact)
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os.makedirs(cache_dir, exist_ok=True)
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if not os.path.exists(obj):
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return
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# If path is directory, store an zip archive.
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if os.path.isdir(obj):
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dir_cache_artifact = '{}.directory'.format(cache_artifact)
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build_utils.zip_dir(dir_cache_artifact, obj)
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if pycache_debug_enable:
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print("archive {} to {}".format(obj, dir_cache_artifact))
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else:
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shutil.copyfile(obj, cache_artifact)
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if pycache_debug_enable:
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print("copying {} to {}".format(obj, cache_artifact))
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class PyCache():
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def __init__(self, cache_dir=None):
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cache_dir = os.environ.get('PYCACHE_DIR')
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if cache_dir:
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self.pycache_dir = cache_dir
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else:
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raise Exception('Error: failed to get PYCACHE_DIR')
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self.storage = Storage()
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def retrieve(self, output_paths, prefix=''):
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for path in output_paths:
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_, cache_artifact = self.descend_directory('{}{}'.format(
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prefix, path))
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result = self.storage.retrieve_object(cache_artifact, path)
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if not result:
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return result
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try:
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self.report_cache_stat('cache_hit')
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except: # noqa: E722 pylint: disable=bare-except
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pass
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return 1
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def save(self, output_paths, prefix=''):
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for path in output_paths:
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_, cache_artifact = self.descend_directory('{}{}'.format(
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prefix, path))
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self.storage.add_object(cache_artifact, path)
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def report_cache_stat(self, hit_or_miss):
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pyd_server, pyd_port = self.get_pyd()
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conn = client.HTTPConnection(pyd_server, pyd_port)
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conn.request(hit_or_miss, '/')
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conn.close()
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def get_pyd(self):
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daemon_config_file = '{}/.config'.format(self.pycache_dir)
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if not os.path.exists(daemon_config_file):
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raise Exception('Warning: no pycache daemon process exists.')
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with open(daemon_config_file, 'r') as jsonfile:
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data = json.load(jsonfile)
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return data.get('host'), data.get('port')
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@classmethod
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def cache_key(cls, path):
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sha256 = hashlib.sha256()
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sha256.update(path.encode())
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return sha256.hexdigest()
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def descend_directory(self, path):
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digest = self.cache_key(path)
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cache_dir = os.path.join(self.pycache_dir, digest[:2])
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return cache_dir, os.path.join(cache_dir, digest[2:])
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# Manifest file to record inputs/outputs/commands.
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def get_manifest_path(self, path):
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manifest_dir, manifest_file = self.descend_directory(path)
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os.makedirs(manifest_dir, exist_ok=True)
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return manifest_file
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pycache_enabled = (os.environ.get('PYCACHE_DIR') is not None)
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pycache_debug_enable = int(os.environ.get('PRINT_BUILD_EXPLANATIONS', 0))
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if pycache_enabled:
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pycache = PyCache()
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else:
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pycache = None # pylint: disable=invalid-name
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