Mercurial > repos > shellac > sam_consensus_v3
annotate env/lib/python3.9/site-packages/pip/_internal/req/constructors.py @ 0:4f3585e2f14b draft default tip
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
author | shellac |
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date | Mon, 22 Mar 2021 18:12:50 +0000 |
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1 """Backing implementation for InstallRequirement's various constructors |
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2 |
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3 The idea here is that these formed a major chunk of InstallRequirement's size |
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4 so, moving them and support code dedicated to them outside of that class |
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5 helps creates for better understandability for the rest of the code. |
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6 |
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7 These are meant to be used elsewhere within pip to create instances of |
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8 InstallRequirement. |
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9 """ |
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10 |
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11 import logging |
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12 import os |
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13 import re |
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14 |
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15 from pip._vendor.packaging.markers import Marker |
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16 from pip._vendor.packaging.requirements import InvalidRequirement, Requirement |
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17 from pip._vendor.packaging.specifiers import Specifier |
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18 from pip._vendor.pkg_resources import RequirementParseError, parse_requirements |
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19 |
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20 from pip._internal.exceptions import InstallationError |
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21 from pip._internal.models.index import PyPI, TestPyPI |
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22 from pip._internal.models.link import Link |
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23 from pip._internal.models.wheel import Wheel |
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24 from pip._internal.pyproject import make_pyproject_path |
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25 from pip._internal.req.req_install import InstallRequirement |
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26 from pip._internal.utils.filetypes import is_archive_file |
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27 from pip._internal.utils.misc import is_installable_dir |
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28 from pip._internal.utils.typing import MYPY_CHECK_RUNNING |
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29 from pip._internal.utils.urls import path_to_url |
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30 from pip._internal.vcs import is_url, vcs |
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31 |
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32 if MYPY_CHECK_RUNNING: |
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33 from typing import Any, Dict, Optional, Set, Tuple, Union |
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34 |
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35 from pip._internal.req.req_file import ParsedRequirement |
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36 |
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37 |
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38 __all__ = [ |
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39 "install_req_from_editable", "install_req_from_line", |
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40 "parse_editable" |
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41 ] |
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42 |
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43 logger = logging.getLogger(__name__) |
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44 operators = Specifier._operators.keys() |
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45 |
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46 |
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47 def _strip_extras(path): |
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48 # type: (str) -> Tuple[str, Optional[str]] |
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49 m = re.match(r'^(.+)(\[[^\]]+\])$', path) |
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50 extras = None |
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51 if m: |
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52 path_no_extras = m.group(1) |
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53 extras = m.group(2) |
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54 else: |
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55 path_no_extras = path |
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56 |
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57 return path_no_extras, extras |
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58 |
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59 |
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60 def convert_extras(extras): |
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61 # type: (Optional[str]) -> Set[str] |
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62 if not extras: |
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63 return set() |
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64 return Requirement("placeholder" + extras.lower()).extras |
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65 |
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66 |
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67 def parse_editable(editable_req): |
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68 # type: (str) -> Tuple[Optional[str], str, Set[str]] |
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69 """Parses an editable requirement into: |
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70 - a requirement name |
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71 - an URL |
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72 - extras |
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73 - editable options |
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74 Accepted requirements: |
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75 svn+http://blahblah@rev#egg=Foobar[baz]&subdirectory=version_subdir |
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76 .[some_extra] |
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77 """ |
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78 |
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79 url = editable_req |
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80 |
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81 # If a file path is specified with extras, strip off the extras. |
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82 url_no_extras, extras = _strip_extras(url) |
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83 |
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84 if os.path.isdir(url_no_extras): |
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85 if not os.path.exists(os.path.join(url_no_extras, 'setup.py')): |
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86 msg = ( |
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87 'File "setup.py" not found. Directory cannot be installed ' |
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88 'in editable mode: {}'.format(os.path.abspath(url_no_extras)) |
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89 ) |
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90 pyproject_path = make_pyproject_path(url_no_extras) |
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91 if os.path.isfile(pyproject_path): |
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92 msg += ( |
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93 '\n(A "pyproject.toml" file was found, but editable ' |
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94 'mode currently requires a setup.py based build.)' |
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95 ) |
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96 raise InstallationError(msg) |
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97 |
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98 # Treating it as code that has already been checked out |
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99 url_no_extras = path_to_url(url_no_extras) |
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100 |
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101 if url_no_extras.lower().startswith('file:'): |
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102 package_name = Link(url_no_extras).egg_fragment |
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103 if extras: |
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104 return ( |
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105 package_name, |
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106 url_no_extras, |
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107 Requirement("placeholder" + extras.lower()).extras, |
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108 ) |
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109 else: |
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110 return package_name, url_no_extras, set() |
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111 |
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112 for version_control in vcs: |
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113 if url.lower().startswith(f'{version_control}:'): |
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114 url = f'{version_control}+{url}' |
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115 break |
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116 |
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117 link = Link(url) |
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118 |
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119 if not link.is_vcs: |
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120 backends = ", ".join(vcs.all_schemes) |
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121 raise InstallationError( |
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122 f'{editable_req} is not a valid editable requirement. ' |
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123 f'It should either be a path to a local project or a VCS URL ' |
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124 f'(beginning with {backends}).' |
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125 ) |
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126 |
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127 package_name = link.egg_fragment |
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128 if not package_name: |
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129 raise InstallationError( |
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130 "Could not detect requirement name for '{}', please specify one " |
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131 "with #egg=your_package_name".format(editable_req) |
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132 ) |
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133 return package_name, url, set() |
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134 |
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135 |
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136 def deduce_helpful_msg(req): |
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137 # type: (str) -> str |
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138 """Returns helpful msg in case requirements file does not exist, |
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139 or cannot be parsed. |
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140 |
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141 :params req: Requirements file path |
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142 """ |
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143 msg = "" |
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144 if os.path.exists(req): |
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145 msg = " The path does exist. " |
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146 # Try to parse and check if it is a requirements file. |
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147 try: |
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148 with open(req, 'r') as fp: |
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149 # parse first line only |
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150 next(parse_requirements(fp.read())) |
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151 msg += ( |
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152 "The argument you provided " |
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153 "({}) appears to be a" |
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154 " requirements file. If that is the" |
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155 " case, use the '-r' flag to install" |
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156 " the packages specified within it." |
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157 ).format(req) |
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158 except RequirementParseError: |
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159 logger.debug( |
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160 "Cannot parse '%s' as requirements file", req, exc_info=True |
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161 ) |
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162 else: |
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163 msg += f" File '{req}' does not exist." |
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164 return msg |
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165 |
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166 |
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167 class RequirementParts: |
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168 def __init__( |
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169 self, |
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170 requirement, # type: Optional[Requirement] |
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171 link, # type: Optional[Link] |
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172 markers, # type: Optional[Marker] |
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173 extras, # type: Set[str] |
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174 ): |
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175 self.requirement = requirement |
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176 self.link = link |
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177 self.markers = markers |
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178 self.extras = extras |
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179 |
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180 |
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181 def parse_req_from_editable(editable_req): |
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182 # type: (str) -> RequirementParts |
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183 name, url, extras_override = parse_editable(editable_req) |
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184 |
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185 if name is not None: |
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186 try: |
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187 req = Requirement(name) |
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188 except InvalidRequirement: |
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189 raise InstallationError(f"Invalid requirement: '{name}'") |
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190 else: |
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191 req = None |
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192 |
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193 link = Link(url) |
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194 |
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195 return RequirementParts(req, link, None, extras_override) |
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196 |
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197 |
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198 # ---- The actual constructors follow ---- |
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199 |
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200 |
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201 def install_req_from_editable( |
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202 editable_req, # type: str |
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203 comes_from=None, # type: Optional[Union[InstallRequirement, str]] |
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204 use_pep517=None, # type: Optional[bool] |
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205 isolated=False, # type: bool |
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206 options=None, # type: Optional[Dict[str, Any]] |
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207 constraint=False, # type: bool |
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208 user_supplied=False, # type: bool |
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209 ): |
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210 # type: (...) -> InstallRequirement |
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211 |
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212 parts = parse_req_from_editable(editable_req) |
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213 |
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214 return InstallRequirement( |
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215 parts.requirement, |
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216 comes_from=comes_from, |
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217 user_supplied=user_supplied, |
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218 editable=True, |
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219 link=parts.link, |
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220 constraint=constraint, |
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221 use_pep517=use_pep517, |
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222 isolated=isolated, |
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223 install_options=options.get("install_options", []) if options else [], |
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224 global_options=options.get("global_options", []) if options else [], |
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225 hash_options=options.get("hashes", {}) if options else {}, |
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226 extras=parts.extras, |
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227 ) |
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228 |
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229 |
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230 def _looks_like_path(name): |
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231 # type: (str) -> bool |
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232 """Checks whether the string "looks like" a path on the filesystem. |
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233 |
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234 This does not check whether the target actually exists, only judge from the |
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235 appearance. |
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236 |
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237 Returns true if any of the following conditions is true: |
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238 * a path separator is found (either os.path.sep or os.path.altsep); |
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239 * a dot is found (which represents the current directory). |
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240 """ |
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241 if os.path.sep in name: |
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242 return True |
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243 if os.path.altsep is not None and os.path.altsep in name: |
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244 return True |
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245 if name.startswith("."): |
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246 return True |
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247 return False |
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248 |
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249 |
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250 def _get_url_from_path(path, name): |
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251 # type: (str, str) -> Optional[str] |
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252 """ |
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253 First, it checks whether a provided path is an installable directory |
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254 (e.g. it has a setup.py). If it is, returns the path. |
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255 |
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256 If false, check if the path is an archive file (such as a .whl). |
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257 The function checks if the path is a file. If false, if the path has |
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258 an @, it will treat it as a PEP 440 URL requirement and return the path. |
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259 """ |
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260 if _looks_like_path(name) and os.path.isdir(path): |
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261 if is_installable_dir(path): |
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262 return path_to_url(path) |
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263 raise InstallationError( |
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264 "Directory {name!r} is not installable. Neither 'setup.py' " |
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265 "nor 'pyproject.toml' found.".format(**locals()) |
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266 ) |
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267 if not is_archive_file(path): |
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268 return None |
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269 if os.path.isfile(path): |
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270 return path_to_url(path) |
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271 urlreq_parts = name.split('@', 1) |
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272 if len(urlreq_parts) >= 2 and not _looks_like_path(urlreq_parts[0]): |
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273 # If the path contains '@' and the part before it does not look |
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274 # like a path, try to treat it as a PEP 440 URL req instead. |
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275 return None |
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276 logger.warning( |
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277 'Requirement %r looks like a filename, but the ' |
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278 'file does not exist', |
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279 name |
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280 ) |
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281 return path_to_url(path) |
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282 |
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283 |
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284 def parse_req_from_line(name, line_source): |
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285 # type: (str, Optional[str]) -> RequirementParts |
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286 if is_url(name): |
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287 marker_sep = '; ' |
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288 else: |
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289 marker_sep = ';' |
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290 if marker_sep in name: |
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291 name, markers_as_string = name.split(marker_sep, 1) |
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292 markers_as_string = markers_as_string.strip() |
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293 if not markers_as_string: |
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294 markers = None |
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295 else: |
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296 markers = Marker(markers_as_string) |
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297 else: |
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298 markers = None |
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299 name = name.strip() |
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300 req_as_string = None |
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301 path = os.path.normpath(os.path.abspath(name)) |
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302 link = None |
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303 extras_as_string = None |
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304 |
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305 if is_url(name): |
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306 link = Link(name) |
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307 else: |
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308 p, extras_as_string = _strip_extras(path) |
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309 url = _get_url_from_path(p, name) |
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310 if url is not None: |
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311 link = Link(url) |
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312 |
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313 # it's a local file, dir, or url |
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314 if link: |
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315 # Handle relative file URLs |
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316 if link.scheme == 'file' and re.search(r'\.\./', link.url): |
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317 link = Link( |
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318 path_to_url(os.path.normpath(os.path.abspath(link.path)))) |
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319 # wheel file |
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320 if link.is_wheel: |
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321 wheel = Wheel(link.filename) # can raise InvalidWheelFilename |
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322 req_as_string = "{wheel.name}=={wheel.version}".format(**locals()) |
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323 else: |
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324 # set the req to the egg fragment. when it's not there, this |
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325 # will become an 'unnamed' requirement |
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326 req_as_string = link.egg_fragment |
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327 |
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328 # a requirement specifier |
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329 else: |
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330 req_as_string = name |
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331 |
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332 extras = convert_extras(extras_as_string) |
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333 |
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334 def with_source(text): |
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335 # type: (str) -> str |
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336 if not line_source: |
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337 return text |
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338 return f'{text} (from {line_source})' |
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339 |
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340 if req_as_string is not None: |
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341 try: |
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342 req = Requirement(req_as_string) |
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343 except InvalidRequirement: |
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344 if os.path.sep in req_as_string: |
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345 add_msg = "It looks like a path." |
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346 add_msg += deduce_helpful_msg(req_as_string) |
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347 elif ('=' in req_as_string and |
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348 not any(op in req_as_string for op in operators)): |
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349 add_msg = "= is not a valid operator. Did you mean == ?" |
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350 else: |
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351 add_msg = '' |
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352 msg = with_source( |
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353 f'Invalid requirement: {req_as_string!r}' |
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354 ) |
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355 if add_msg: |
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356 msg += f'\nHint: {add_msg}' |
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357 raise InstallationError(msg) |
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358 else: |
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359 # Deprecate extras after specifiers: "name>=1.0[extras]" |
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360 # This currently works by accident because _strip_extras() parses |
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361 # any extras in the end of the string and those are saved in |
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362 # RequirementParts |
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363 for spec in req.specifier: |
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364 spec_str = str(spec) |
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365 if spec_str.endswith(']'): |
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366 msg = f"Extras after version '{spec_str}'." |
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367 raise InstallationError(msg) |
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368 else: |
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369 req = None |
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370 |
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371 return RequirementParts(req, link, markers, extras) |
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372 |
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373 |
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374 def install_req_from_line( |
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375 name, # type: str |
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376 comes_from=None, # type: Optional[Union[str, InstallRequirement]] |
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377 use_pep517=None, # type: Optional[bool] |
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378 isolated=False, # type: bool |
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379 options=None, # type: Optional[Dict[str, Any]] |
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380 constraint=False, # type: bool |
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381 line_source=None, # type: Optional[str] |
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382 user_supplied=False, # type: bool |
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383 ): |
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384 # type: (...) -> InstallRequirement |
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385 """Creates an InstallRequirement from a name, which might be a |
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386 requirement, directory containing 'setup.py', filename, or URL. |
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387 |
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388 :param line_source: An optional string describing where the line is from, |
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389 for logging purposes in case of an error. |
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390 """ |
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391 parts = parse_req_from_line(name, line_source) |
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392 |
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393 return InstallRequirement( |
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394 parts.requirement, comes_from, link=parts.link, markers=parts.markers, |
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395 use_pep517=use_pep517, isolated=isolated, |
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396 install_options=options.get("install_options", []) if options else [], |
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397 global_options=options.get("global_options", []) if options else [], |
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398 hash_options=options.get("hashes", {}) if options else {}, |
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399 constraint=constraint, |
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400 extras=parts.extras, |
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401 user_supplied=user_supplied, |
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402 ) |
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403 |
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404 |
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405 def install_req_from_req_string( |
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406 req_string, # type: str |
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407 comes_from=None, # type: Optional[InstallRequirement] |
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408 isolated=False, # type: bool |
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409 use_pep517=None, # type: Optional[bool] |
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410 user_supplied=False, # type: bool |
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411 ): |
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412 # type: (...) -> InstallRequirement |
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413 try: |
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414 req = Requirement(req_string) |
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415 except InvalidRequirement: |
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416 raise InstallationError(f"Invalid requirement: '{req_string}'") |
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417 |
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418 domains_not_allowed = [ |
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419 PyPI.file_storage_domain, |
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420 TestPyPI.file_storage_domain, |
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421 ] |
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422 if (req.url and comes_from and comes_from.link and |
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423 comes_from.link.netloc in domains_not_allowed): |
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424 # Explicitly disallow pypi packages that depend on external urls |
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425 raise InstallationError( |
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426 "Packages installed from PyPI cannot depend on packages " |
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427 "which are not also hosted on PyPI.\n" |
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428 "{} depends on {} ".format(comes_from.name, req) |
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429 ) |
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430 |
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431 return InstallRequirement( |
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432 req, |
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433 comes_from, |
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434 isolated=isolated, |
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435 use_pep517=use_pep517, |
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436 user_supplied=user_supplied, |
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437 ) |
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438 |
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439 |
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440 def install_req_from_parsed_requirement( |
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441 parsed_req, # type: ParsedRequirement |
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442 isolated=False, # type: bool |
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443 use_pep517=None, # type: Optional[bool] |
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444 user_supplied=False, # type: bool |
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445 ): |
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446 # type: (...) -> InstallRequirement |
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447 if parsed_req.is_editable: |
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448 req = install_req_from_editable( |
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449 parsed_req.requirement, |
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450 comes_from=parsed_req.comes_from, |
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451 use_pep517=use_pep517, |
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452 constraint=parsed_req.constraint, |
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453 isolated=isolated, |
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454 user_supplied=user_supplied, |
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455 ) |
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456 |
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457 else: |
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458 req = install_req_from_line( |
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459 parsed_req.requirement, |
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460 comes_from=parsed_req.comes_from, |
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461 use_pep517=use_pep517, |
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462 isolated=isolated, |
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463 options=parsed_req.options, |
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464 constraint=parsed_req.constraint, |
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465 line_source=parsed_req.line_source, |
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466 user_supplied=user_supplied, |
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467 ) |
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468 return req |