1 # Copyright (c) 2009, Google Inc. All rights reserved. 2 # Copyright (c) 2009 Apple Inc. All rights reserved. 3 # 4 # Redistribution and use in source and binary forms, with or without 5 # modification, are permitted provided that the following conditions are 6 # met: 7 # 8 # * Redistributions of source code must retain the above copyright 9 # notice, this list of conditions and the following disclaimer. 10 # * Redistributions in binary form must reproduce the above 11 # copyright notice, this list of conditions and the following disclaimer 12 # in the documentation and/or other materials provided with the 13 # distribution. 14 # * Neither the name of Google Inc. nor the names of its 15 # contributors may be used to endorse or promote products derived from 16 # this software without specific prior written permission. 17 # 18 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21 # A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22 # OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23 # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24 # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 # 30 # WebKit's Python module for logging 31 # This module is now deprecated in favor of python's built-in logging.py. 32 33 import codecs 34 import os 35 import sys 36 37 38 def log(string): 39 print >> sys.stderr, string 40 41 42 def error(string): 43 log("ERROR: %s" % string) 44 exit(1) 45 46 47 # Simple class to split output between multiple destinations 48 class tee: 49 def __init__(self, *files): 50 self.files = files 51 52 # Callers should pass an already encoded string for writing. 53 def write(self, bytes): 54 for file in self.files: 55 file.write(bytes) 56 57 58 class OutputTee: 59 def __init__(self): 60 self._original_stdout = None 61 self._original_stderr = None 62 self._files_for_output = [] 63 64 def add_log(self, path): 65 log_file = self._open_log_file(path) 66 self._files_for_output.append(log_file) 67 self._tee_outputs_to_files(self._files_for_output) 68 return log_file 69 70 def remove_log(self, log_file): 71 self._files_for_output.remove(log_file) 72 self._tee_outputs_to_files(self._files_for_output) 73 log_file.close() 74 75 @staticmethod 76 def _open_log_file(log_path): 77 (log_directory, log_name) = os.path.split(log_path) 78 if log_directory and not os.path.exists(log_directory): 79 os.makedirs(log_directory) 80 return codecs.open(log_path, "a+", "utf-8") 81 82 def _tee_outputs_to_files(self, files): 83 if not self._original_stdout: 84 self._original_stdout = sys.stdout 85 self._original_stderr = sys.stderr 86 if files and len(files): 87 sys.stdout = tee(self._original_stdout, *files) 88 sys.stderr = tee(self._original_stderr, *files) 89 else: 90 sys.stdout = self._original_stdout 91 sys.stderr = self._original_stderr 92
