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80 lines
3.1 KiB
Python
80 lines
3.1 KiB
Python
# Copyright (c) 2009, Google Inc. All rights reserved.
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# Copyright (c) 2009 Apple Inc. All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions are
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# met:
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#
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# * Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# * Redistributions in binary form must reproduce the above
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# copyright notice, this list of conditions and the following disclaimer
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# in the documentation and/or other materials provided with the
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# distribution.
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# * Neither the name of Google Inc. nor the names of its
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# contributors may be used to endorse or promote products derived from
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# this software without specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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import codecs
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import os
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import sys
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# Simple class to split output between multiple destinations
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class Tee:
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def __init__(self, *files):
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self.files = files
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# Callers should pass an already encoded string for writing.
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def write(self, bytes):
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for file in self.files:
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file.write(bytes)
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class OutputTee:
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def __init__(self):
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self._original_stdout = None
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self._original_stderr = None
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self._files_for_output = []
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def add_log(self, path):
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log_file = self._open_log_file(path)
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self._files_for_output.append(log_file)
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self._tee_outputs_to_files(self._files_for_output)
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return log_file
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def remove_log(self, log_file):
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self._files_for_output.remove(log_file)
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self._tee_outputs_to_files(self._files_for_output)
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log_file.close()
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@staticmethod
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def _open_log_file(log_path):
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(log_directory, log_name) = os.path.split(log_path)
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if log_directory and not os.path.exists(log_directory):
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os.makedirs(log_directory)
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return codecs.open(log_path, "a+", "utf-8")
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def _tee_outputs_to_files(self, files):
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if not self._original_stdout:
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self._original_stdout = sys.stdout
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self._original_stderr = sys.stderr
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if files and len(files):
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sys.stdout = Tee(self._original_stdout, *files)
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sys.stderr = Tee(self._original_stderr, *files)
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else:
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sys.stdout = self._original_stdout
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sys.stderr = self._original_stderr
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