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annotate lib/python3.8/site-packages/pip/_internal/locations.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 """Locations where we look for configs, install stuff, etc"""
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2
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3 # The following comment should be removed at some point in the future.
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4 # mypy: strict-optional=False
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5
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6 from __future__ import absolute_import
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7
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8 import os
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9 import os.path
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10 import platform
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11 import site
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12 import sys
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13 import sysconfig
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14 from distutils import sysconfig as distutils_sysconfig
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15 from distutils.command.install import SCHEME_KEYS # type: ignore
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16 from distutils.command.install import install as distutils_install_command
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17
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18 from pip._internal.models.scheme import Scheme
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19 from pip._internal.utils import appdirs
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20 from pip._internal.utils.compat import WINDOWS
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21 from pip._internal.utils.typing import MYPY_CHECK_RUNNING, cast
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22 from pip._internal.utils.virtualenv import running_under_virtualenv
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23
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24 if MYPY_CHECK_RUNNING:
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25 from typing import Dict, List, Optional, Union
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26
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27 from distutils.cmd import Command as DistutilsCommand
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28
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29
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30 # Application Directories
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31 USER_CACHE_DIR = appdirs.user_cache_dir("pip")
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32
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33
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34 def get_major_minor_version():
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35 # type: () -> str
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36 """
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37 Return the major-minor version of the current Python as a string, e.g.
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38 "3.7" or "3.10".
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39 """
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40 return '{}.{}'.format(*sys.version_info)
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41
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42
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43 def get_src_prefix():
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44 # type: () -> str
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45 if running_under_virtualenv():
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46 src_prefix = os.path.join(sys.prefix, 'src')
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47 else:
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48 # FIXME: keep src in cwd for now (it is not a temporary folder)
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49 try:
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50 src_prefix = os.path.join(os.getcwd(), 'src')
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51 except OSError:
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52 # In case the current working directory has been renamed or deleted
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53 sys.exit(
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54 "The folder you are executing pip from can no longer be found."
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55 )
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56
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57 # under macOS + virtualenv sys.prefix is not properly resolved
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58 # it is something like /path/to/python/bin/..
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59 return os.path.abspath(src_prefix)
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60
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61
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62 # FIXME doesn't account for venv linked to global site-packages
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63
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64 site_packages = sysconfig.get_path("purelib") # type: Optional[str]
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65
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66 # This is because of a bug in PyPy's sysconfig module, see
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67 # https://bitbucket.org/pypy/pypy/issues/2506/sysconfig-returns-incorrect-paths
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68 # for more information.
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69 if platform.python_implementation().lower() == "pypy":
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70 site_packages = distutils_sysconfig.get_python_lib()
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71 try:
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72 # Use getusersitepackages if this is present, as it ensures that the
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73 # value is initialised properly.
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74 user_site = site.getusersitepackages()
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75 except AttributeError:
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76 user_site = site.USER_SITE
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77
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78 if WINDOWS:
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79 bin_py = os.path.join(sys.prefix, 'Scripts')
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80 bin_user = os.path.join(user_site, 'Scripts')
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81 # buildout uses 'bin' on Windows too?
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82 if not os.path.exists(bin_py):
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83 bin_py = os.path.join(sys.prefix, 'bin')
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84 bin_user = os.path.join(user_site, 'bin')
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85 else:
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86 bin_py = os.path.join(sys.prefix, 'bin')
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87 bin_user = os.path.join(user_site, 'bin')
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88
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89 # Forcing to use /usr/local/bin for standard macOS framework installs
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90 # Also log to ~/Library/Logs/ for use with the Console.app log viewer
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91 if sys.platform[:6] == 'darwin' and sys.prefix[:16] == '/System/Library/':
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92 bin_py = '/usr/local/bin'
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93
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94
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95 def distutils_scheme(
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96 dist_name, user=False, home=None, root=None, isolated=False, prefix=None
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97 ):
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98 # type:(str, bool, str, str, bool, str) -> Dict[str, str]
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99 """
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100 Return a distutils install scheme
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101 """
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102 from distutils.dist import Distribution
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103
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104 dist_args = {'name': dist_name} # type: Dict[str, Union[str, List[str]]]
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105 if isolated:
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106 dist_args["script_args"] = ["--no-user-cfg"]
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107
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108 d = Distribution(dist_args)
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109 d.parse_config_files()
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110 obj = None # type: Optional[DistutilsCommand]
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111 obj = d.get_command_obj('install', create=True)
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112 assert obj is not None
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113 i = cast(distutils_install_command, obj)
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114 # NOTE: setting user or home has the side-effect of creating the home dir
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115 # or user base for installations during finalize_options()
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116 # ideally, we'd prefer a scheme class that has no side-effects.
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117 assert not (user and prefix), "user={} prefix={}".format(user, prefix)
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118 assert not (home and prefix), "home={} prefix={}".format(home, prefix)
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119 i.user = user or i.user
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120 if user or home:
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121 i.prefix = ""
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122 i.prefix = prefix or i.prefix
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123 i.home = home or i.home
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124 i.root = root or i.root
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125 i.finalize_options()
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126
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127 scheme = {}
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128 for key in SCHEME_KEYS:
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129 scheme[key] = getattr(i, 'install_' + key)
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130
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131 # install_lib specified in setup.cfg should install *everything*
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132 # into there (i.e. it takes precedence over both purelib and
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133 # platlib). Note, i.install_lib is *always* set after
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134 # finalize_options(); we only want to override here if the user
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135 # has explicitly requested it hence going back to the config
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136 if 'install_lib' in d.get_option_dict('install'):
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137 scheme.update(dict(purelib=i.install_lib, platlib=i.install_lib))
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138
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139 if running_under_virtualenv():
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140 scheme['headers'] = os.path.join(
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141 sys.prefix,
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142 'include',
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143 'site',
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144 'python{}'.format(get_major_minor_version()),
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145 dist_name,
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146 )
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147
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148 if root is not None:
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149 path_no_drive = os.path.splitdrive(
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150 os.path.abspath(scheme["headers"]))[1]
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151 scheme["headers"] = os.path.join(
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152 root,
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153 path_no_drive[1:],
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154 )
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155
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156 return scheme
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157
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158
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159 def get_scheme(
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160 dist_name, # type: str
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161 user=False, # type: bool
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162 home=None, # type: Optional[str]
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163 root=None, # type: Optional[str]
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164 isolated=False, # type: bool
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165 prefix=None, # type: Optional[str]
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166 ):
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167 # type: (...) -> Scheme
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168 """
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169 Get the "scheme" corresponding to the input parameters. The distutils
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170 documentation provides the context for the available schemes:
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171 https://docs.python.org/3/install/index.html#alternate-installation
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172
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173 :param dist_name: the name of the package to retrieve the scheme for, used
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174 in the headers scheme path
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175 :param user: indicates to use the "user" scheme
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176 :param home: indicates to use the "home" scheme and provides the base
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177 directory for the same
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178 :param root: root under which other directories are re-based
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179 :param isolated: equivalent to --no-user-cfg, i.e. do not consider
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180 ~/.pydistutils.cfg (posix) or ~/pydistutils.cfg (non-posix) for
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181 scheme paths
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182 :param prefix: indicates to use the "prefix" scheme and provides the
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183 base directory for the same
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184 """
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185 scheme = distutils_scheme(
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186 dist_name, user, home, root, isolated, prefix
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187 )
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188 return Scheme(
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189 platlib=scheme["platlib"],
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190 purelib=scheme["purelib"],
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191 headers=scheme["headers"],
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192 scripts=scheme["scripts"],
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193 data=scheme["data"],
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194 )