1# Copyright 2017 - The Android Open Source Project
2#
3# Licensed under the Apache License, Version 2.0 (the "License");
4# you may not use this file except in compliance with the License.
5# You may obtain a copy of the License at
6#
7#     http://www.apache.org/licenses/LICENSE-2.0
8#
9# Unless required by applicable law or agreed to in writing, software
10# distributed under the License is distributed on an "AS IS" BASIS,
11# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12# See the License for the specific language governing permissions and
13# limitations under the License.
14
15"""Provides class PropDumper."""
16
17import logging
18import re
19
20
21class PropDumper(object):
22
23  def __init__(self, file_accessor, args):
24    filename_in_mount = args[0]
25    logging.debug('Parse %s...', filename_in_mount)
26    with file_accessor.prepare_file(filename_in_mount) as filename:
27      if filename:
28        with open(filename) as fp:
29          self._content = fp.read()
30
31  def __enter__(self):
32    # do nothing
33    return self
34
35  def __exit__(self, exc_type, exc_val, exc_tb):
36    if hasattr(self, '_content'):
37      del self._content
38
39  def dump(self, lookup_key):
40    if not hasattr(self, '_content'):
41      return None
42
43    match = re.search('%s=(.*)' % (lookup_key), self._content)
44    return match.group(1) if match else None
45