annotate lib/python3.8/site-packages/pip/_internal/utils/logging.py @ 0:9e54283cc701 draft

"planemo upload commit d12c32a45bcd441307e632fca6d9af7d60289d44"
author guerler
date Mon, 27 Jul 2020 03:47:31 -0400 (2020-07-27)
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1 # The following comment should be removed at some point in the future.
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2 # mypy: disallow-untyped-defs=False
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3
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4 from __future__ import absolute_import
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5
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6 import contextlib
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7 import errno
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8 import logging
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9 import logging.handlers
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10 import os
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11 import sys
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12 from logging import Filter, getLogger
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13
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14 from pip._vendor.six import PY2
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15
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16 from pip._internal.utils.compat import WINDOWS
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17 from pip._internal.utils.deprecation import DEPRECATION_MSG_PREFIX
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18 from pip._internal.utils.misc import ensure_dir
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19
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20 try:
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21 import threading
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22 except ImportError:
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23 import dummy_threading as threading # type: ignore
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24
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25
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26 try:
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27 # Use "import as" and set colorama in the else clause to avoid mypy
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28 # errors and get the following correct revealed type for colorama:
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29 # `Union[_importlib_modulespec.ModuleType, None]`
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30 # Otherwise, we get an error like the following in the except block:
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31 # > Incompatible types in assignment (expression has type "None",
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32 # variable has type Module)
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33 # TODO: eliminate the need to use "import as" once mypy addresses some
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34 # of its issues with conditional imports. Here is an umbrella issue:
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35 # https://github.com/python/mypy/issues/1297
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36 from pip._vendor import colorama as _colorama
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37 # Lots of different errors can come from this, including SystemError and
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38 # ImportError.
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39 except Exception:
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40 colorama = None
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41 else:
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42 # Import Fore explicitly rather than accessing below as colorama.Fore
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43 # to avoid the following error running mypy:
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44 # > Module has no attribute "Fore"
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45 # TODO: eliminate the need to import Fore once mypy addresses some of its
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46 # issues with conditional imports. This particular case could be an
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47 # instance of the following issue (but also see the umbrella issue above):
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48 # https://github.com/python/mypy/issues/3500
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49 from pip._vendor.colorama import Fore
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50
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51 colorama = _colorama
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52
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53
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54 _log_state = threading.local()
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55 _log_state.indentation = 0
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56 subprocess_logger = getLogger('pip.subprocessor')
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57
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58
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59 class BrokenStdoutLoggingError(Exception):
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60 """
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61 Raised if BrokenPipeError occurs for the stdout stream while logging.
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62 """
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63 pass
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64
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65
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66 # BrokenPipeError does not exist in Python 2 and, in addition, manifests
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67 # differently in Windows and non-Windows.
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68 if WINDOWS:
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69 # In Windows, a broken pipe can show up as EINVAL rather than EPIPE:
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70 # https://bugs.python.org/issue19612
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71 # https://bugs.python.org/issue30418
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72 if PY2:
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73 def _is_broken_pipe_error(exc_class, exc):
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74 """See the docstring for non-Windows Python 3 below."""
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75 return (exc_class is IOError and
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76 exc.errno in (errno.EINVAL, errno.EPIPE))
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77 else:
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78 # In Windows, a broken pipe IOError became OSError in Python 3.
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79 def _is_broken_pipe_error(exc_class, exc):
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80 """See the docstring for non-Windows Python 3 below."""
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81 return ((exc_class is BrokenPipeError) or # noqa: F821
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82 (exc_class is OSError and
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83 exc.errno in (errno.EINVAL, errno.EPIPE)))
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84 elif PY2:
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85 def _is_broken_pipe_error(exc_class, exc):
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86 """See the docstring for non-Windows Python 3 below."""
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87 return (exc_class is IOError and exc.errno == errno.EPIPE)
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88 else:
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89 # Then we are in the non-Windows Python 3 case.
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90 def _is_broken_pipe_error(exc_class, exc):
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91 """
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92 Return whether an exception is a broken pipe error.
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93
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94 Args:
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95 exc_class: an exception class.
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96 exc: an exception instance.
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97 """
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98 return (exc_class is BrokenPipeError) # noqa: F821
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99
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100
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101 @contextlib.contextmanager
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102 def indent_log(num=2):
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103 """
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104 A context manager which will cause the log output to be indented for any
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105 log messages emitted inside it.
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106 """
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107 _log_state.indentation += num
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108 try:
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109 yield
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110 finally:
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111 _log_state.indentation -= num
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112
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113
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114 def get_indentation():
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115 return getattr(_log_state, 'indentation', 0)
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116
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117
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118 class IndentingFormatter(logging.Formatter):
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119
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120 def __init__(self, *args, **kwargs):
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121 """
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122 A logging.Formatter that obeys the indent_log() context manager.
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123
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124 :param add_timestamp: A bool indicating output lines should be prefixed
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125 with their record's timestamp.
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126 """
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127 self.add_timestamp = kwargs.pop("add_timestamp", False)
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128 super(IndentingFormatter, self).__init__(*args, **kwargs)
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129
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130 def get_message_start(self, formatted, levelno):
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131 """
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132 Return the start of the formatted log message (not counting the
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133 prefix to add to each line).
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134 """
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135 if levelno < logging.WARNING:
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136 return ''
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137 if formatted.startswith(DEPRECATION_MSG_PREFIX):
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138 # Then the message already has a prefix. We don't want it to
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139 # look like "WARNING: DEPRECATION: ...."
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140 return ''
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141 if levelno < logging.ERROR:
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142 return 'WARNING: '
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143
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144 return 'ERROR: '
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145
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146 def format(self, record):
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147 """
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148 Calls the standard formatter, but will indent all of the log message
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149 lines by our current indentation level.
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150 """
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151 formatted = super(IndentingFormatter, self).format(record)
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152 message_start = self.get_message_start(formatted, record.levelno)
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153 formatted = message_start + formatted
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154
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155 prefix = ''
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156 if self.add_timestamp:
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157 # TODO: Use Formatter.default_time_format after dropping PY2.
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158 t = self.formatTime(record, "%Y-%m-%dT%H:%M:%S")
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159 prefix = '%s,%03d ' % (t, record.msecs)
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160 prefix += " " * get_indentation()
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161 formatted = "".join([
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162 prefix + line
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163 for line in formatted.splitlines(True)
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164 ])
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165 return formatted
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166
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167
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168 def _color_wrap(*colors):
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169 def wrapped(inp):
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170 return "".join(list(colors) + [inp, colorama.Style.RESET_ALL])
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171 return wrapped
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172
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173
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174 class ColorizedStreamHandler(logging.StreamHandler):
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175
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176 # Don't build up a list of colors if we don't have colorama
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177 if colorama:
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178 COLORS = [
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179 # This needs to be in order from highest logging level to lowest.
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180 (logging.ERROR, _color_wrap(Fore.RED)),
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181 (logging.WARNING, _color_wrap(Fore.YELLOW)),
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182 ]
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183 else:
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184 COLORS = []
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185
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186 def __init__(self, stream=None, no_color=None):
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187 logging.StreamHandler.__init__(self, stream)
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188 self._no_color = no_color
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189
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190 if WINDOWS and colorama:
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191 self.stream = colorama.AnsiToWin32(self.stream)
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192
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193 def _using_stdout(self):
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194 """
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195 Return whether the handler is using sys.stdout.
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196 """
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197 if WINDOWS and colorama:
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198 # Then self.stream is an AnsiToWin32 object.
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199 return self.stream.wrapped is sys.stdout
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200
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201 return self.stream is sys.stdout
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202
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203 def should_color(self):
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204 # Don't colorize things if we do not have colorama or if told not to
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205 if not colorama or self._no_color:
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206 return False
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207
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208 real_stream = (
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209 self.stream if not isinstance(self.stream, colorama.AnsiToWin32)
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210 else self.stream.wrapped
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211 )
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212
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213 # If the stream is a tty we should color it
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214 if hasattr(real_stream, "isatty") and real_stream.isatty():
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215 return True
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216
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217 # If we have an ANSI term we should color it
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218 if os.environ.get("TERM") == "ANSI":
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219 return True
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220
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221 # If anything else we should not color it
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222 return False
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223
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224 def format(self, record):
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225 msg = logging.StreamHandler.format(self, record)
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226
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227 if self.should_color():
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228 for level, color in self.COLORS:
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229 if record.levelno >= level:
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230 msg = color(msg)
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231 break
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232
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233 return msg
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234
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235 # The logging module says handleError() can be customized.
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236 def handleError(self, record):
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237 exc_class, exc = sys.exc_info()[:2]
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238 # If a broken pipe occurred while calling write() or flush() on the
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239 # stdout stream in logging's Handler.emit(), then raise our special
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240 # exception so we can handle it in main() instead of logging the
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241 # broken pipe error and continuing.
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242 if (exc_class and self._using_stdout() and
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243 _is_broken_pipe_error(exc_class, exc)):
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244 raise BrokenStdoutLoggingError()
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245
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246 return super(ColorizedStreamHandler, self).handleError(record)
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247
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248
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249 class BetterRotatingFileHandler(logging.handlers.RotatingFileHandler):
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250
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251 def _open(self):
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252 ensure_dir(os.path.dirname(self.baseFilename))
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253 return logging.handlers.RotatingFileHandler._open(self)
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254
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255
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256 class MaxLevelFilter(Filter):
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257
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258 def __init__(self, level):
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259 self.level = level
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260
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261 def filter(self, record):
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262 return record.levelno < self.level
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263
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264
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265 class ExcludeLoggerFilter(Filter):
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266
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267 """
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268 A logging Filter that excludes records from a logger (or its children).
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269 """
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270
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271 def filter(self, record):
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272 # The base Filter class allows only records from a logger (or its
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273 # children).
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274 return not super(ExcludeLoggerFilter, self).filter(record)
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275
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276
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277 def setup_logging(verbosity, no_color, user_log_file):
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278 """Configures and sets up all of the logging
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279
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280 Returns the requested logging level, as its integer value.
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281 """
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282
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283 # Determine the level to be logging at.
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284 if verbosity >= 1:
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285 level = "DEBUG"
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286 elif verbosity == -1:
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287 level = "WARNING"
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288 elif verbosity == -2:
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289 level = "ERROR"
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290 elif verbosity <= -3:
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291 level = "CRITICAL"
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292 else:
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293 level = "INFO"
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294
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295 level_number = getattr(logging, level)
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296
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297 # The "root" logger should match the "console" level *unless* we also need
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298 # to log to a user log file.
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299 include_user_log = user_log_file is not None
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300 if include_user_log:
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301 additional_log_file = user_log_file
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302 root_level = "DEBUG"
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303 else:
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304 additional_log_file = "/dev/null"
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305 root_level = level
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306
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307 # Disable any logging besides WARNING unless we have DEBUG level logging
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308 # enabled for vendored libraries.
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309 vendored_log_level = "WARNING" if level in ["INFO", "ERROR"] else "DEBUG"
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310
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311 # Shorthands for clarity
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312 log_streams = {
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313 "stdout": "ext://sys.stdout",
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314 "stderr": "ext://sys.stderr",
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315 }
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316 handler_classes = {
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317 "stream": "pip._internal.utils.logging.ColorizedStreamHandler",
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318 "file": "pip._internal.utils.logging.BetterRotatingFileHandler",
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319 }
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320 handlers = ["console", "console_errors", "console_subprocess"] + (
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321 ["user_log"] if include_user_log else []
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322 )
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323
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324 logging.config.dictConfig({
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325 "version": 1,
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326 "disable_existing_loggers": False,
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327 "filters": {
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328 "exclude_warnings": {
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329 "()": "pip._internal.utils.logging.MaxLevelFilter",
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330 "level": logging.WARNING,
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331 },
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332 "restrict_to_subprocess": {
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333 "()": "logging.Filter",
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334 "name": subprocess_logger.name,
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335 },
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336 "exclude_subprocess": {
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337 "()": "pip._internal.utils.logging.ExcludeLoggerFilter",
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338 "name": subprocess_logger.name,
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339 },
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340 },
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341 "formatters": {
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342 "indent": {
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343 "()": IndentingFormatter,
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344 "format": "%(message)s",
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345 },
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346 "indent_with_timestamp": {
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347 "()": IndentingFormatter,
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348 "format": "%(message)s",
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349 "add_timestamp": True,
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350 },
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351 },
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352 "handlers": {
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353 "console": {
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354 "level": level,
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355 "class": handler_classes["stream"],
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356 "no_color": no_color,
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357 "stream": log_streams["stdout"],
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358 "filters": ["exclude_subprocess", "exclude_warnings"],
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359 "formatter": "indent",
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360 },
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361 "console_errors": {
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362 "level": "WARNING",
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363 "class": handler_classes["stream"],
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364 "no_color": no_color,
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365 "stream": log_streams["stderr"],
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366 "filters": ["exclude_subprocess"],
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367 "formatter": "indent",
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368 },
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369 # A handler responsible for logging to the console messages
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370 # from the "subprocessor" logger.
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371 "console_subprocess": {
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372 "level": level,
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373 "class": handler_classes["stream"],
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374 "no_color": no_color,
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375 "stream": log_streams["stderr"],
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376 "filters": ["restrict_to_subprocess"],
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377 "formatter": "indent",
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378 },
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379 "user_log": {
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380 "level": "DEBUG",
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381 "class": handler_classes["file"],
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382 "filename": additional_log_file,
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383 "delay": True,
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384 "formatter": "indent_with_timestamp",
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385 },
9e54283cc701 "planemo upload commit d12c32a45bcd441307e632fca6d9af7d60289d44"
guerler
parents:
diff changeset
386 },
9e54283cc701 "planemo upload commit d12c32a45bcd441307e632fca6d9af7d60289d44"
guerler
parents:
diff changeset
387 "root": {
9e54283cc701 "planemo upload commit d12c32a45bcd441307e632fca6d9af7d60289d44"
guerler
parents:
diff changeset
388 "level": root_level,
9e54283cc701 "planemo upload commit d12c32a45bcd441307e632fca6d9af7d60289d44"
guerler
parents:
diff changeset
389 "handlers": handlers,
9e54283cc701 "planemo upload commit d12c32a45bcd441307e632fca6d9af7d60289d44"
guerler
parents:
diff changeset
390 },
9e54283cc701 "planemo upload commit d12c32a45bcd441307e632fca6d9af7d60289d44"
guerler
parents:
diff changeset
391 "loggers": {
9e54283cc701 "planemo upload commit d12c32a45bcd441307e632fca6d9af7d60289d44"
guerler
parents:
diff changeset
392 "pip._vendor": {
9e54283cc701 "planemo upload commit d12c32a45bcd441307e632fca6d9af7d60289d44"
guerler
parents:
diff changeset
393 "level": vendored_log_level
9e54283cc701 "planemo upload commit d12c32a45bcd441307e632fca6d9af7d60289d44"
guerler
parents:
diff changeset
394 }
9e54283cc701 "planemo upload commit d12c32a45bcd441307e632fca6d9af7d60289d44"
guerler
parents:
diff changeset
395 },
9e54283cc701 "planemo upload commit d12c32a45bcd441307e632fca6d9af7d60289d44"
guerler
parents:
diff changeset
396 })
9e54283cc701 "planemo upload commit d12c32a45bcd441307e632fca6d9af7d60289d44"
guerler
parents:
diff changeset
397
9e54283cc701 "planemo upload commit d12c32a45bcd441307e632fca6d9af7d60289d44"
guerler
parents:
diff changeset
398 return level_number