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

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"planemo upload commit d12c32a45bcd441307e632fca6d9af7d60289d44"
author guerler
date Mon, 27 Jul 2020 03:47:31 -0400
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1 """Base Command class, and related routines"""
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2
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3 from __future__ import absolute_import, print_function
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4
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5 import logging
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6 import logging.config
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7 import optparse
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8 import os
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9 import platform
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10 import sys
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11 import traceback
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12
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13 from pip._internal.cli import cmdoptions
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14 from pip._internal.cli.command_context import CommandContextMixIn
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15 from pip._internal.cli.parser import (
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16 ConfigOptionParser,
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17 UpdatingDefaultsHelpFormatter,
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18 )
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19 from pip._internal.cli.status_codes import (
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20 ERROR,
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21 PREVIOUS_BUILD_DIR_ERROR,
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22 SUCCESS,
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23 UNKNOWN_ERROR,
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24 VIRTUALENV_NOT_FOUND,
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25 )
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26 from pip._internal.exceptions import (
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27 BadCommand,
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28 CommandError,
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29 InstallationError,
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30 PreviousBuildDirError,
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31 UninstallationError,
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32 )
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33 from pip._internal.utils.deprecation import deprecated
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34 from pip._internal.utils.filesystem import check_path_owner
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35 from pip._internal.utils.logging import BrokenStdoutLoggingError, setup_logging
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36 from pip._internal.utils.misc import get_prog, normalize_path
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37 from pip._internal.utils.temp_dir import global_tempdir_manager
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38 from pip._internal.utils.typing import MYPY_CHECK_RUNNING
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39 from pip._internal.utils.virtualenv import running_under_virtualenv
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40
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41 if MYPY_CHECK_RUNNING:
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42 from typing import List, Tuple, Any
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43 from optparse import Values
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44
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45 __all__ = ['Command']
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46
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47 logger = logging.getLogger(__name__)
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48
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49
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50 class Command(CommandContextMixIn):
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51 usage = None # type: str
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52 ignore_require_venv = False # type: bool
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53
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54 def __init__(self, name, summary, isolated=False):
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55 # type: (str, str, bool) -> None
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56 super(Command, self).__init__()
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57 parser_kw = {
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58 'usage': self.usage,
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59 'prog': '%s %s' % (get_prog(), name),
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60 'formatter': UpdatingDefaultsHelpFormatter(),
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61 'add_help_option': False,
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62 'name': name,
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63 'description': self.__doc__,
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64 'isolated': isolated,
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65 }
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66
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67 self.name = name
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68 self.summary = summary
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69 self.parser = ConfigOptionParser(**parser_kw)
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70
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71 # Commands should add options to this option group
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72 optgroup_name = '%s Options' % self.name.capitalize()
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73 self.cmd_opts = optparse.OptionGroup(self.parser, optgroup_name)
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74
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75 # Add the general options
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76 gen_opts = cmdoptions.make_option_group(
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77 cmdoptions.general_group,
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78 self.parser,
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79 )
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80 self.parser.add_option_group(gen_opts)
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81
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82 def handle_pip_version_check(self, options):
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83 # type: (Values) -> None
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84 """
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85 This is a no-op so that commands by default do not do the pip version
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86 check.
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87 """
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88 # Make sure we do the pip version check if the index_group options
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89 # are present.
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90 assert not hasattr(options, 'no_index')
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91
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92 def run(self, options, args):
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93 # type: (Values, List[Any]) -> Any
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94 raise NotImplementedError
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95
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96 def parse_args(self, args):
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97 # type: (List[str]) -> Tuple[Any, Any]
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98 # factored out for testability
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99 return self.parser.parse_args(args)
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100
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101 def main(self, args):
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102 # type: (List[str]) -> int
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103 try:
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104 with self.main_context():
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105 return self._main(args)
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106 finally:
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107 logging.shutdown()
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108
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109 def _main(self, args):
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110 # type: (List[str]) -> int
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111 # Intentionally set as early as possible so globally-managed temporary
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112 # directories are available to the rest of the code.
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113 self.enter_context(global_tempdir_manager())
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114
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115 options, args = self.parse_args(args)
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116
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117 # Set verbosity so that it can be used elsewhere.
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118 self.verbosity = options.verbose - options.quiet
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119
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120 level_number = setup_logging(
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121 verbosity=self.verbosity,
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122 no_color=options.no_color,
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123 user_log_file=options.log,
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124 )
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125
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126 if (
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127 sys.version_info[:2] == (2, 7) and
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128 not options.no_python_version_warning
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129 ):
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130 message = (
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131 "A future version of pip will drop support for Python 2.7. "
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132 "More details about Python 2 support in pip, can be found at "
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133 "https://pip.pypa.io/en/latest/development/release-process/#python-2-support" # noqa
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134 )
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135 if platform.python_implementation() == "CPython":
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136 message = (
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137 "Python 2.7 reached the end of its life on January "
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138 "1st, 2020. Please upgrade your Python as Python 2.7 "
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139 "is no longer maintained. "
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140 ) + message
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141 deprecated(message, replacement=None, gone_in=None)
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142
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143 if options.skip_requirements_regex:
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144 deprecated(
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145 "--skip-requirements-regex is unsupported and will be removed",
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146 replacement=(
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147 "manage requirements/constraints files explicitly, "
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148 "possibly generating them from metadata"
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149 ),
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150 gone_in="20.1",
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151 issue=7297,
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152 )
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153
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154 # TODO: Try to get these passing down from the command?
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155 # without resorting to os.environ to hold these.
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156 # This also affects isolated builds and it should.
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157
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158 if options.no_input:
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159 os.environ['PIP_NO_INPUT'] = '1'
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160
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161 if options.exists_action:
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162 os.environ['PIP_EXISTS_ACTION'] = ' '.join(options.exists_action)
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163
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164 if options.require_venv and not self.ignore_require_venv:
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165 # If a venv is required check if it can really be found
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166 if not running_under_virtualenv():
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167 logger.critical(
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168 'Could not find an activated virtualenv (required).'
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169 )
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170 sys.exit(VIRTUALENV_NOT_FOUND)
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171
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172 if options.cache_dir:
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173 options.cache_dir = normalize_path(options.cache_dir)
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174 if not check_path_owner(options.cache_dir):
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175 logger.warning(
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176 "The directory '%s' or its parent directory is not owned "
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177 "or is not writable by the current user. The cache "
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178 "has been disabled. Check the permissions and owner of "
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179 "that directory. If executing pip with sudo, you may want "
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180 "sudo's -H flag.",
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181 options.cache_dir,
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182 )
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183 options.cache_dir = None
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184
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185 try:
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186 status = self.run(options, args)
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187 # FIXME: all commands should return an exit status
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188 # and when it is done, isinstance is not needed anymore
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189 if isinstance(status, int):
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190 return status
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191 except PreviousBuildDirError as exc:
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192 logger.critical(str(exc))
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193 logger.debug('Exception information:', exc_info=True)
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194
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195 return PREVIOUS_BUILD_DIR_ERROR
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196 except (InstallationError, UninstallationError, BadCommand) as exc:
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197 logger.critical(str(exc))
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198 logger.debug('Exception information:', exc_info=True)
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199
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200 return ERROR
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201 except CommandError as exc:
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202 logger.critical('%s', exc)
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203 logger.debug('Exception information:', exc_info=True)
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204
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205 return ERROR
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206 except BrokenStdoutLoggingError:
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207 # Bypass our logger and write any remaining messages to stderr
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208 # because stdout no longer works.
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209 print('ERROR: Pipe to stdout was broken', file=sys.stderr)
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210 if level_number <= logging.DEBUG:
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211 traceback.print_exc(file=sys.stderr)
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212
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213 return ERROR
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214 except KeyboardInterrupt:
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215 logger.critical('Operation cancelled by user')
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216 logger.debug('Exception information:', exc_info=True)
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217
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218 return ERROR
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219 except BaseException:
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220 logger.critical('Exception:', exc_info=True)
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221
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222 return UNKNOWN_ERROR
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223 finally:
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224 self.handle_pip_version_check(options)
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225
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226 return SUCCESS