airflow compression 源码
airflow compression 代码
文件路径：/airflow/utils/compression.py
#
# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements. See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership. The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied. See the License for the
# specific language governing permissions and limitations
# under the License.
from __future__ import annotations
import bz2
import gzip
import shutil
from tempfile import NamedTemporaryFile
def uncompress_file(input_file_name, file_extension, dest_dir):
"""Uncompress gz and bz2 files"""
if file_extension.lower() not in ('.gz', '.bz2'):
raise NotImplementedError(
f"Received {file_extension} format. Only gz and bz2 files can currently be uncompressed."
)
if file_extension.lower() == '.gz':
fmodule = gzip.GzipFile
elif file_extension.lower() == '.bz2':
fmodule = bz2.BZ2File
with fmodule(input_file_name, mode='rb') as f_compressed, NamedTemporaryFile(
dir=dest_dir, mode='wb', delete=False
) as f_uncompressed:
shutil.copyfileobj(f_compressed, f_uncompressed)
return f_uncompressed.name
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