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annotate lib/python3.8/site-packages/pip/_internal/req/req_set.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 # The following comment should be removed at some point in the future.
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2 # mypy: strict-optional=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 logging
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7 from collections import OrderedDict
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8
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9 from pip._vendor.packaging.utils import canonicalize_name
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10
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11 from pip._internal import pep425tags
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12 from pip._internal.exceptions import InstallationError
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13 from pip._internal.models.wheel import Wheel
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14 from pip._internal.utils.logging import indent_log
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15 from pip._internal.utils.typing import MYPY_CHECK_RUNNING
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16
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17 if MYPY_CHECK_RUNNING:
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18 from typing import Dict, Iterable, List, Optional, Tuple
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19 from pip._internal.req.req_install import InstallRequirement
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20
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21
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22 logger = logging.getLogger(__name__)
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23
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24
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25 class RequirementSet(object):
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26
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27 def __init__(self, check_supported_wheels=True):
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28 # type: (bool) -> None
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29 """Create a RequirementSet.
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30 """
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31
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32 self.requirements = OrderedDict() # type: Dict[str, InstallRequirement] # noqa: E501
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33 self.check_supported_wheels = check_supported_wheels
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34
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35 self.unnamed_requirements = [] # type: List[InstallRequirement]
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36 self.successfully_downloaded = [] # type: List[InstallRequirement]
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37 self.reqs_to_cleanup = [] # type: List[InstallRequirement]
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38
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39 def __str__(self):
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40 # type: () -> str
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41 requirements = sorted(
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42 (req for req in self.requirements.values() if not req.comes_from),
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43 key=lambda req: canonicalize_name(req.name),
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44 )
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45 return ' '.join(str(req.req) for req in requirements)
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46
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47 def __repr__(self):
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48 # type: () -> str
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49 requirements = sorted(
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50 self.requirements.values(),
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51 key=lambda req: canonicalize_name(req.name),
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52 )
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53
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54 format_string = '<{classname} object; {count} requirement(s): {reqs}>'
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55 return format_string.format(
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56 classname=self.__class__.__name__,
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57 count=len(requirements),
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58 reqs=', '.join(str(req.req) for req in requirements),
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59 )
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60
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61 def add_unnamed_requirement(self, install_req):
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62 # type: (InstallRequirement) -> None
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63 assert not install_req.name
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64 self.unnamed_requirements.append(install_req)
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65
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66 def add_named_requirement(self, install_req):
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67 # type: (InstallRequirement) -> None
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68 assert install_req.name
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69
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70 project_name = canonicalize_name(install_req.name)
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71 self.requirements[project_name] = install_req
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72
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73 def add_requirement(
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74 self,
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75 install_req, # type: InstallRequirement
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76 parent_req_name=None, # type: Optional[str]
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77 extras_requested=None # type: Optional[Iterable[str]]
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78 ):
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79 # type: (...) -> Tuple[List[InstallRequirement], Optional[InstallRequirement]] # noqa: E501
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80 """Add install_req as a requirement to install.
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81
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82 :param parent_req_name: The name of the requirement that needed this
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83 added. The name is used because when multiple unnamed requirements
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84 resolve to the same name, we could otherwise end up with dependency
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85 links that point outside the Requirements set. parent_req must
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86 already be added. Note that None implies that this is a user
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87 supplied requirement, vs an inferred one.
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88 :param extras_requested: an iterable of extras used to evaluate the
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89 environment markers.
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90 :return: Additional requirements to scan. That is either [] if
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91 the requirement is not applicable, or [install_req] if the
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92 requirement is applicable and has just been added.
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93 """
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94 # If the markers do not match, ignore this requirement.
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95 if not install_req.match_markers(extras_requested):
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96 logger.info(
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97 "Ignoring %s: markers '%s' don't match your environment",
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98 install_req.name, install_req.markers,
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99 )
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100 return [], None
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101
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102 # If the wheel is not supported, raise an error.
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103 # Should check this after filtering out based on environment markers to
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104 # allow specifying different wheels based on the environment/OS, in a
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105 # single requirements file.
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106 if install_req.link and install_req.link.is_wheel:
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107 wheel = Wheel(install_req.link.filename)
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108 tags = pep425tags.get_supported()
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109 if (self.check_supported_wheels and not wheel.supported(tags)):
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110 raise InstallationError(
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111 "%s is not a supported wheel on this platform." %
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112 wheel.filename
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113 )
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114
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115 # This next bit is really a sanity check.
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116 assert install_req.is_direct == (parent_req_name is None), (
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117 "a direct req shouldn't have a parent and also, "
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118 "a non direct req should have a parent"
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119 )
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120
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121 # Unnamed requirements are scanned again and the requirement won't be
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122 # added as a dependency until after scanning.
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123 if not install_req.name:
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124 self.add_unnamed_requirement(install_req)
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125 return [install_req], None
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126
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127 try:
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128 existing_req = self.get_requirement(install_req.name)
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129 except KeyError:
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130 existing_req = None
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131
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132 has_conflicting_requirement = (
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133 parent_req_name is None and
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134 existing_req and
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135 not existing_req.constraint and
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136 existing_req.extras == install_req.extras and
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137 existing_req.req.specifier != install_req.req.specifier
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138 )
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139 if has_conflicting_requirement:
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140 raise InstallationError(
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141 "Double requirement given: %s (already in %s, name=%r)"
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142 % (install_req, existing_req, install_req.name)
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143 )
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144
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145 # When no existing requirement exists, add the requirement as a
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146 # dependency and it will be scanned again after.
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147 if not existing_req:
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148 self.add_named_requirement(install_req)
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149 # We'd want to rescan this requirement later
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150 return [install_req], install_req
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151
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152 # Assume there's no need to scan, and that we've already
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153 # encountered this for scanning.
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154 if install_req.constraint or not existing_req.constraint:
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155 return [], existing_req
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156
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157 does_not_satisfy_constraint = (
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158 install_req.link and
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159 not (
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160 existing_req.link and
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161 install_req.link.path == existing_req.link.path
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162 )
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163 )
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164 if does_not_satisfy_constraint:
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165 self.reqs_to_cleanup.append(install_req)
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166 raise InstallationError(
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167 "Could not satisfy constraints for '%s': "
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168 "installation from path or url cannot be "
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169 "constrained to a version" % install_req.name,
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170 )
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171 # If we're now installing a constraint, mark the existing
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172 # object for real installation.
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173 existing_req.constraint = False
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174 existing_req.extras = tuple(sorted(
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175 set(existing_req.extras) | set(install_req.extras)
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176 ))
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177 logger.debug(
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178 "Setting %s extras to: %s",
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179 existing_req, existing_req.extras,
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180 )
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181 # Return the existing requirement for addition to the parent and
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182 # scanning again.
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183 return [existing_req], existing_req
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184
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185 def has_requirement(self, name):
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186 # type: (str) -> bool
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187 project_name = canonicalize_name(name)
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188
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189 return (
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190 project_name in self.requirements and
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191 not self.requirements[project_name].constraint
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192 )
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193
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194 def get_requirement(self, name):
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195 # type: (str) -> InstallRequirement
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196 project_name = canonicalize_name(name)
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197
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198 if project_name in self.requirements:
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199 return self.requirements[project_name]
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200
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201 raise KeyError("No project with the name %r" % name)
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202
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203 def cleanup_files(self):
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204 # type: () -> None
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205 """Clean up files, remove builds."""
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206 logger.debug('Cleaning up...')
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207 with indent_log():
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208 for req in self.reqs_to_cleanup:
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209 req.remove_temporary_source()