airflow_scheduler/.venv/Lib/site-packages/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