Mercurial > repos > shellac > sam_consensus_v3
annotate env/lib/python3.9/site-packages/pip/_internal/req/req_file.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 """ |
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2 Requirements file parsing |
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3 """ |
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4 |
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5 import optparse |
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6 import os |
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7 import re |
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8 import shlex |
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9 import urllib.parse |
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10 |
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11 from pip._internal.cli import cmdoptions |
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12 from pip._internal.exceptions import InstallationError, RequirementsFileParseError |
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13 from pip._internal.models.search_scope import SearchScope |
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14 from pip._internal.network.utils import raise_for_status |
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15 from pip._internal.utils.encoding import auto_decode |
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16 from pip._internal.utils.typing import MYPY_CHECK_RUNNING |
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17 from pip._internal.utils.urls import get_url_scheme, url_to_path |
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18 |
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19 if MYPY_CHECK_RUNNING: |
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20 from optparse import Values |
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21 from typing import ( |
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22 Any, |
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23 Callable, |
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24 Dict, |
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25 Iterator, |
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26 List, |
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27 NoReturn, |
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28 Optional, |
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29 Text, |
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30 Tuple, |
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31 ) |
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32 |
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33 from pip._internal.index.package_finder import PackageFinder |
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34 from pip._internal.network.session import PipSession |
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35 |
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36 ReqFileLines = Iterator[Tuple[int, Text]] |
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37 |
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38 LineParser = Callable[[Text], Tuple[str, Values]] |
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39 |
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40 |
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41 __all__ = ['parse_requirements'] |
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42 |
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43 SCHEME_RE = re.compile(r'^(http|https|file):', re.I) |
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44 COMMENT_RE = re.compile(r'(^|\s+)#.*$') |
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45 |
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46 # Matches environment variable-style values in '${MY_VARIABLE_1}' with the |
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47 # variable name consisting of only uppercase letters, digits or the '_' |
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48 # (underscore). This follows the POSIX standard defined in IEEE Std 1003.1, |
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49 # 2013 Edition. |
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50 ENV_VAR_RE = re.compile(r'(?P<var>\$\{(?P<name>[A-Z0-9_]+)\})') |
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51 |
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52 SUPPORTED_OPTIONS = [ |
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53 cmdoptions.index_url, |
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54 cmdoptions.extra_index_url, |
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55 cmdoptions.no_index, |
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56 cmdoptions.constraints, |
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57 cmdoptions.requirements, |
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58 cmdoptions.editable, |
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59 cmdoptions.find_links, |
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60 cmdoptions.no_binary, |
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61 cmdoptions.only_binary, |
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62 cmdoptions.prefer_binary, |
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63 cmdoptions.require_hashes, |
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64 cmdoptions.pre, |
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65 cmdoptions.trusted_host, |
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66 cmdoptions.use_new_feature, |
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67 ] # type: List[Callable[..., optparse.Option]] |
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68 |
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69 # options to be passed to requirements |
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70 SUPPORTED_OPTIONS_REQ = [ |
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71 cmdoptions.install_options, |
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72 cmdoptions.global_options, |
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73 cmdoptions.hash, |
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74 ] # type: List[Callable[..., optparse.Option]] |
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75 |
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76 # the 'dest' string values |
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77 SUPPORTED_OPTIONS_REQ_DEST = [str(o().dest) for o in SUPPORTED_OPTIONS_REQ] |
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78 |
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79 |
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80 class ParsedRequirement: |
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81 def __init__( |
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82 self, |
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83 requirement, # type:str |
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84 is_editable, # type: bool |
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85 comes_from, # type: str |
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86 constraint, # type: bool |
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87 options=None, # type: Optional[Dict[str, Any]] |
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88 line_source=None, # type: Optional[str] |
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89 ): |
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90 # type: (...) -> None |
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91 self.requirement = requirement |
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92 self.is_editable = is_editable |
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93 self.comes_from = comes_from |
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94 self.options = options |
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95 self.constraint = constraint |
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96 self.line_source = line_source |
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97 |
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98 |
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99 class ParsedLine: |
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100 def __init__( |
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101 self, |
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102 filename, # type: str |
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103 lineno, # type: int |
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104 args, # type: str |
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105 opts, # type: Values |
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106 constraint, # type: bool |
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107 ): |
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108 # type: (...) -> None |
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109 self.filename = filename |
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110 self.lineno = lineno |
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111 self.opts = opts |
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112 self.constraint = constraint |
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113 |
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114 if args: |
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115 self.is_requirement = True |
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116 self.is_editable = False |
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117 self.requirement = args |
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118 elif opts.editables: |
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119 self.is_requirement = True |
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120 self.is_editable = True |
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121 # We don't support multiple -e on one line |
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122 self.requirement = opts.editables[0] |
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123 else: |
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124 self.is_requirement = False |
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125 |
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126 |
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127 def parse_requirements( |
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128 filename, # type: str |
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129 session, # type: PipSession |
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130 finder=None, # type: Optional[PackageFinder] |
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131 options=None, # type: Optional[optparse.Values] |
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132 constraint=False, # type: bool |
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133 ): |
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134 # type: (...) -> Iterator[ParsedRequirement] |
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135 """Parse a requirements file and yield ParsedRequirement instances. |
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136 |
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137 :param filename: Path or url of requirements file. |
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138 :param session: PipSession instance. |
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139 :param finder: Instance of pip.index.PackageFinder. |
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140 :param options: cli options. |
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141 :param constraint: If true, parsing a constraint file rather than |
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142 requirements file. |
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143 """ |
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144 line_parser = get_line_parser(finder) |
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145 parser = RequirementsFileParser(session, line_parser) |
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146 |
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147 for parsed_line in parser.parse(filename, constraint): |
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148 parsed_req = handle_line( |
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149 parsed_line, |
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150 options=options, |
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151 finder=finder, |
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152 session=session |
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153 ) |
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154 if parsed_req is not None: |
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155 yield parsed_req |
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156 |
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157 |
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158 def preprocess(content): |
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159 # type: (str) -> ReqFileLines |
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160 """Split, filter, and join lines, and return a line iterator |
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161 |
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162 :param content: the content of the requirements file |
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163 """ |
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164 lines_enum = enumerate(content.splitlines(), start=1) # type: ReqFileLines |
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165 lines_enum = join_lines(lines_enum) |
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166 lines_enum = ignore_comments(lines_enum) |
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167 lines_enum = expand_env_variables(lines_enum) |
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168 return lines_enum |
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169 |
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170 |
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171 def handle_requirement_line( |
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172 line, # type: ParsedLine |
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173 options=None, # type: Optional[optparse.Values] |
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174 ): |
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175 # type: (...) -> ParsedRequirement |
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176 |
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177 # preserve for the nested code path |
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178 line_comes_from = '{} {} (line {})'.format( |
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179 '-c' if line.constraint else '-r', line.filename, line.lineno, |
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180 ) |
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181 |
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182 assert line.is_requirement |
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183 |
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184 if line.is_editable: |
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185 # For editable requirements, we don't support per-requirement |
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186 # options, so just return the parsed requirement. |
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187 return ParsedRequirement( |
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188 requirement=line.requirement, |
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189 is_editable=line.is_editable, |
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190 comes_from=line_comes_from, |
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191 constraint=line.constraint, |
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192 ) |
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193 else: |
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194 if options: |
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195 # Disable wheels if the user has specified build options |
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196 cmdoptions.check_install_build_global(options, line.opts) |
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197 |
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198 # get the options that apply to requirements |
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199 req_options = {} |
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200 for dest in SUPPORTED_OPTIONS_REQ_DEST: |
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201 if dest in line.opts.__dict__ and line.opts.__dict__[dest]: |
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202 req_options[dest] = line.opts.__dict__[dest] |
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203 |
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204 line_source = f'line {line.lineno} of {line.filename}' |
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205 return ParsedRequirement( |
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206 requirement=line.requirement, |
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207 is_editable=line.is_editable, |
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208 comes_from=line_comes_from, |
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209 constraint=line.constraint, |
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210 options=req_options, |
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211 line_source=line_source, |
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212 ) |
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213 |
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214 |
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215 def handle_option_line( |
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216 opts, # type: Values |
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217 filename, # type: str |
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218 lineno, # type: int |
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219 finder=None, # type: Optional[PackageFinder] |
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220 options=None, # type: Optional[optparse.Values] |
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221 session=None, # type: Optional[PipSession] |
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222 ): |
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223 # type: (...) -> None |
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224 |
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225 if options: |
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226 # percolate options upward |
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227 if opts.require_hashes: |
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228 options.require_hashes = opts.require_hashes |
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229 if opts.features_enabled: |
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230 options.features_enabled.extend( |
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231 f for f in opts.features_enabled |
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232 if f not in options.features_enabled |
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233 ) |
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234 |
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235 # set finder options |
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236 if finder: |
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237 find_links = finder.find_links |
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238 index_urls = finder.index_urls |
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239 if opts.index_url: |
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240 index_urls = [opts.index_url] |
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241 if opts.no_index is True: |
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242 index_urls = [] |
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243 if opts.extra_index_urls: |
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244 index_urls.extend(opts.extra_index_urls) |
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245 if opts.find_links: |
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246 # FIXME: it would be nice to keep track of the source |
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247 # of the find_links: support a find-links local path |
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248 # relative to a requirements file. |
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249 value = opts.find_links[0] |
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250 req_dir = os.path.dirname(os.path.abspath(filename)) |
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251 relative_to_reqs_file = os.path.join(req_dir, value) |
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252 if os.path.exists(relative_to_reqs_file): |
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253 value = relative_to_reqs_file |
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254 find_links.append(value) |
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255 |
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256 if session: |
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257 # We need to update the auth urls in session |
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258 session.update_index_urls(index_urls) |
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259 |
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260 search_scope = SearchScope( |
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261 find_links=find_links, |
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262 index_urls=index_urls, |
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263 ) |
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264 finder.search_scope = search_scope |
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265 |
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266 if opts.pre: |
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267 finder.set_allow_all_prereleases() |
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268 |
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269 if opts.prefer_binary: |
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270 finder.set_prefer_binary() |
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271 |
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272 if session: |
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273 for host in opts.trusted_hosts or []: |
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274 source = f'line {lineno} of {filename}' |
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275 session.add_trusted_host(host, source=source) |
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276 |
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277 |
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278 def handle_line( |
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279 line, # type: ParsedLine |
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280 options=None, # type: Optional[optparse.Values] |
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281 finder=None, # type: Optional[PackageFinder] |
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282 session=None, # type: Optional[PipSession] |
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283 ): |
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284 # type: (...) -> Optional[ParsedRequirement] |
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285 """Handle a single parsed requirements line; This can result in |
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286 creating/yielding requirements, or updating the finder. |
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287 |
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288 :param line: The parsed line to be processed. |
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289 :param options: CLI options. |
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290 :param finder: The finder - updated by non-requirement lines. |
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291 :param session: The session - updated by non-requirement lines. |
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292 |
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293 Returns a ParsedRequirement object if the line is a requirement line, |
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294 otherwise returns None. |
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295 |
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296 For lines that contain requirements, the only options that have an effect |
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297 are from SUPPORTED_OPTIONS_REQ, and they are scoped to the |
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298 requirement. Other options from SUPPORTED_OPTIONS may be present, but are |
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299 ignored. |
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300 |
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301 For lines that do not contain requirements, the only options that have an |
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302 effect are from SUPPORTED_OPTIONS. Options from SUPPORTED_OPTIONS_REQ may |
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303 be present, but are ignored. These lines may contain multiple options |
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304 (although our docs imply only one is supported), and all our parsed and |
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305 affect the finder. |
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306 """ |
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307 |
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308 if line.is_requirement: |
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309 parsed_req = handle_requirement_line(line, options) |
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310 return parsed_req |
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311 else: |
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312 handle_option_line( |
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313 line.opts, |
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314 line.filename, |
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315 line.lineno, |
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316 finder, |
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317 options, |
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318 session, |
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319 ) |
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320 return None |
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321 |
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322 |
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323 class RequirementsFileParser: |
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324 def __init__( |
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325 self, |
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326 session, # type: PipSession |
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327 line_parser, # type: LineParser |
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328 ): |
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329 # type: (...) -> None |
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330 self._session = session |
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331 self._line_parser = line_parser |
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332 |
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333 def parse(self, filename, constraint): |
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334 # type: (str, bool) -> Iterator[ParsedLine] |
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335 """Parse a given file, yielding parsed lines. |
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336 """ |
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337 yield from self._parse_and_recurse(filename, constraint) |
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338 |
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339 def _parse_and_recurse(self, filename, constraint): |
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340 # type: (str, bool) -> Iterator[ParsedLine] |
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341 for line in self._parse_file(filename, constraint): |
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342 if ( |
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343 not line.is_requirement and |
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344 (line.opts.requirements or line.opts.constraints) |
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345 ): |
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346 # parse a nested requirements file |
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347 if line.opts.requirements: |
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348 req_path = line.opts.requirements[0] |
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349 nested_constraint = False |
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350 else: |
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351 req_path = line.opts.constraints[0] |
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352 nested_constraint = True |
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353 |
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354 # original file is over http |
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355 if SCHEME_RE.search(filename): |
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356 # do a url join so relative paths work |
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357 req_path = urllib.parse.urljoin(filename, req_path) |
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358 # original file and nested file are paths |
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359 elif not SCHEME_RE.search(req_path): |
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360 # do a join so relative paths work |
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361 req_path = os.path.join( |
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362 os.path.dirname(filename), req_path, |
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363 ) |
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364 |
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365 yield from self._parse_and_recurse(req_path, nested_constraint) |
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366 else: |
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367 yield line |
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368 |
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369 def _parse_file(self, filename, constraint): |
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370 # type: (str, bool) -> Iterator[ParsedLine] |
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371 _, content = get_file_content(filename, self._session) |
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372 |
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373 lines_enum = preprocess(content) |
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374 |
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375 for line_number, line in lines_enum: |
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376 try: |
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377 args_str, opts = self._line_parser(line) |
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378 except OptionParsingError as e: |
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379 # add offending line |
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380 msg = f'Invalid requirement: {line}\n{e.msg}' |
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381 raise RequirementsFileParseError(msg) |
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382 |
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383 yield ParsedLine( |
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384 filename, |
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385 line_number, |
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386 args_str, |
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387 opts, |
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388 constraint, |
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389 ) |
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390 |
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391 |
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392 def get_line_parser(finder): |
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393 # type: (Optional[PackageFinder]) -> LineParser |
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394 def parse_line(line): |
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395 # type: (str) -> Tuple[str, Values] |
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396 # Build new parser for each line since it accumulates appendable |
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397 # options. |
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398 parser = build_parser() |
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399 defaults = parser.get_default_values() |
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400 defaults.index_url = None |
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401 if finder: |
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402 defaults.format_control = finder.format_control |
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403 |
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404 args_str, options_str = break_args_options(line) |
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405 |
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406 opts, _ = parser.parse_args(shlex.split(options_str), defaults) |
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407 |
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408 return args_str, opts |
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409 |
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410 return parse_line |
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411 |
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412 |
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413 def break_args_options(line): |
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414 # type: (str) -> Tuple[str, str] |
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415 """Break up the line into an args and options string. We only want to shlex |
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416 (and then optparse) the options, not the args. args can contain markers |
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417 which are corrupted by shlex. |
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418 """ |
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419 tokens = line.split(' ') |
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420 args = [] |
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421 options = tokens[:] |
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422 for token in tokens: |
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423 if token.startswith('-') or token.startswith('--'): |
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424 break |
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425 else: |
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426 args.append(token) |
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427 options.pop(0) |
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428 return ' '.join(args), ' '.join(options) |
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429 |
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430 |
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431 class OptionParsingError(Exception): |
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432 def __init__(self, msg): |
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433 # type: (str) -> None |
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434 self.msg = msg |
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435 |
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436 |
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437 def build_parser(): |
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438 # type: () -> optparse.OptionParser |
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439 """ |
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440 Return a parser for parsing requirement lines |
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441 """ |
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442 parser = optparse.OptionParser(add_help_option=False) |
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443 |
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444 option_factories = SUPPORTED_OPTIONS + SUPPORTED_OPTIONS_REQ |
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445 for option_factory in option_factories: |
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446 option = option_factory() |
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447 parser.add_option(option) |
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448 |
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449 # By default optparse sys.exits on parsing errors. We want to wrap |
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450 # that in our own exception. |
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451 def parser_exit(self, msg): |
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452 # type: (Any, str) -> NoReturn |
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453 raise OptionParsingError(msg) |
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454 # NOTE: mypy disallows assigning to a method |
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455 # https://github.com/python/mypy/issues/2427 |
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456 parser.exit = parser_exit # type: ignore |
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457 |
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458 return parser |
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459 |
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460 |
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461 def join_lines(lines_enum): |
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462 # type: (ReqFileLines) -> ReqFileLines |
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463 """Joins a line ending in '\' with the previous line (except when following |
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464 comments). The joined line takes on the index of the first line. |
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465 """ |
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466 primary_line_number = None |
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467 new_line = [] # type: List[str] |
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468 for line_number, line in lines_enum: |
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469 if not line.endswith('\\') or COMMENT_RE.match(line): |
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470 if COMMENT_RE.match(line): |
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471 # this ensures comments are always matched later |
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472 line = ' ' + line |
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473 if new_line: |
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474 new_line.append(line) |
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475 assert primary_line_number is not None |
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476 yield primary_line_number, ''.join(new_line) |
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477 new_line = [] |
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478 else: |
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479 yield line_number, line |
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480 else: |
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481 if not new_line: |
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482 primary_line_number = line_number |
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483 new_line.append(line.strip('\\')) |
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484 |
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485 # last line contains \ |
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486 if new_line: |
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487 assert primary_line_number is not None |
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488 yield primary_line_number, ''.join(new_line) |
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489 |
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490 # TODO: handle space after '\'. |
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491 |
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492 |
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493 def ignore_comments(lines_enum): |
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494 # type: (ReqFileLines) -> ReqFileLines |
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495 """ |
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496 Strips comments and filter empty lines. |
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497 """ |
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498 for line_number, line in lines_enum: |
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499 line = COMMENT_RE.sub('', line) |
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500 line = line.strip() |
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501 if line: |
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502 yield line_number, line |
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503 |
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504 |
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505 def expand_env_variables(lines_enum): |
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506 # type: (ReqFileLines) -> ReqFileLines |
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507 """Replace all environment variables that can be retrieved via `os.getenv`. |
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508 |
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509 The only allowed format for environment variables defined in the |
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510 requirement file is `${MY_VARIABLE_1}` to ensure two things: |
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511 |
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512 1. Strings that contain a `$` aren't accidentally (partially) expanded. |
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513 2. Ensure consistency across platforms for requirement files. |
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514 |
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515 These points are the result of a discussion on the `github pull |
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516 request #3514 <https://github.com/pypa/pip/pull/3514>`_. |
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517 |
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518 Valid characters in variable names follow the `POSIX standard |
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519 <http://pubs.opengroup.org/onlinepubs/9699919799/>`_ and are limited |
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520 to uppercase letter, digits and the `_` (underscore). |
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521 """ |
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522 for line_number, line in lines_enum: |
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523 for env_var, var_name in ENV_VAR_RE.findall(line): |
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524 value = os.getenv(var_name) |
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525 if not value: |
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526 continue |
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527 |
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528 line = line.replace(env_var, value) |
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529 |
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530 yield line_number, line |
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531 |
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532 |
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533 def get_file_content(url, session): |
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534 # type: (str, PipSession) -> Tuple[str, str] |
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535 """Gets the content of a file; it may be a filename, file: URL, or |
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536 http: URL. Returns (location, content). Content is unicode. |
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537 Respects # -*- coding: declarations on the retrieved files. |
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538 |
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539 :param url: File path or url. |
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540 :param session: PipSession instance. |
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541 """ |
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542 scheme = get_url_scheme(url) |
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543 |
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544 if scheme in ['http', 'https']: |
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545 # FIXME: catch some errors |
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546 resp = session.get(url) |
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547 raise_for_status(resp) |
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548 return resp.url, resp.text |
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549 |
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550 elif scheme == 'file': |
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551 url = url_to_path(url) |
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552 |
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553 try: |
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554 with open(url, 'rb') as f: |
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555 content = auto_decode(f.read()) |
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556 except OSError as exc: |
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557 raise InstallationError( |
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558 f'Could not open requirements file: {exc}' |
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559 ) |
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560 return url, content |