Mercurial > repos > shellac > sam_consensus_v3
annotate env/lib/python3.9/site-packages/setuptools/_distutils/versionpredicate.py @ 0:4f3585e2f14b draft default tip
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author | shellac |
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date | Mon, 22 Mar 2021 18:12:50 +0000 |
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1 """Module for parsing and testing package version predicate strings. |
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2 """ |
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3 import re |
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4 import distutils.version |
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5 import operator |
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6 |
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7 |
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8 re_validPackage = re.compile(r"(?i)^\s*([a-z_]\w*(?:\.[a-z_]\w*)*)(.*)", |
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9 re.ASCII) |
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10 # (package) (rest) |
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11 |
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12 re_paren = re.compile(r"^\s*\((.*)\)\s*$") # (list) inside of parentheses |
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13 re_splitComparison = re.compile(r"^\s*(<=|>=|<|>|!=|==)\s*([^\s,]+)\s*$") |
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14 # (comp) (version) |
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15 |
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16 |
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17 def splitUp(pred): |
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18 """Parse a single version comparison. |
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19 |
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20 Return (comparison string, StrictVersion) |
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21 """ |
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22 res = re_splitComparison.match(pred) |
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23 if not res: |
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24 raise ValueError("bad package restriction syntax: %r" % pred) |
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25 comp, verStr = res.groups() |
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26 return (comp, distutils.version.StrictVersion(verStr)) |
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27 |
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28 compmap = {"<": operator.lt, "<=": operator.le, "==": operator.eq, |
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29 ">": operator.gt, ">=": operator.ge, "!=": operator.ne} |
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30 |
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31 class VersionPredicate: |
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32 """Parse and test package version predicates. |
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33 |
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34 >>> v = VersionPredicate('pyepat.abc (>1.0, <3333.3a1, !=1555.1b3)') |
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35 |
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36 The `name` attribute provides the full dotted name that is given:: |
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37 |
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38 >>> v.name |
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39 'pyepat.abc' |
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40 |
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41 The str() of a `VersionPredicate` provides a normalized |
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42 human-readable version of the expression:: |
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43 |
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44 >>> print(v) |
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45 pyepat.abc (> 1.0, < 3333.3a1, != 1555.1b3) |
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46 |
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47 The `satisfied_by()` method can be used to determine with a given |
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48 version number is included in the set described by the version |
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49 restrictions:: |
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50 |
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51 >>> v.satisfied_by('1.1') |
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52 True |
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53 >>> v.satisfied_by('1.4') |
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54 True |
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55 >>> v.satisfied_by('1.0') |
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56 False |
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57 >>> v.satisfied_by('4444.4') |
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58 False |
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59 >>> v.satisfied_by('1555.1b3') |
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60 False |
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61 |
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62 `VersionPredicate` is flexible in accepting extra whitespace:: |
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63 |
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64 >>> v = VersionPredicate(' pat( == 0.1 ) ') |
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65 >>> v.name |
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66 'pat' |
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67 >>> v.satisfied_by('0.1') |
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68 True |
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69 >>> v.satisfied_by('0.2') |
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70 False |
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71 |
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72 If any version numbers passed in do not conform to the |
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73 restrictions of `StrictVersion`, a `ValueError` is raised:: |
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74 |
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75 >>> v = VersionPredicate('p1.p2.p3.p4(>=1.0, <=1.3a1, !=1.2zb3)') |
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76 Traceback (most recent call last): |
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77 ... |
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78 ValueError: invalid version number '1.2zb3' |
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79 |
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80 It the module or package name given does not conform to what's |
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81 allowed as a legal module or package name, `ValueError` is |
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82 raised:: |
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83 |
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84 >>> v = VersionPredicate('foo-bar') |
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85 Traceback (most recent call last): |
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86 ... |
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87 ValueError: expected parenthesized list: '-bar' |
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88 |
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89 >>> v = VersionPredicate('foo bar (12.21)') |
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90 Traceback (most recent call last): |
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91 ... |
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92 ValueError: expected parenthesized list: 'bar (12.21)' |
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93 |
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94 """ |
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95 |
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96 def __init__(self, versionPredicateStr): |
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97 """Parse a version predicate string. |
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98 """ |
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99 # Fields: |
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100 # name: package name |
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101 # pred: list of (comparison string, StrictVersion) |
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102 |
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103 versionPredicateStr = versionPredicateStr.strip() |
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104 if not versionPredicateStr: |
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105 raise ValueError("empty package restriction") |
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106 match = re_validPackage.match(versionPredicateStr) |
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107 if not match: |
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108 raise ValueError("bad package name in %r" % versionPredicateStr) |
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109 self.name, paren = match.groups() |
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110 paren = paren.strip() |
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111 if paren: |
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112 match = re_paren.match(paren) |
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113 if not match: |
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114 raise ValueError("expected parenthesized list: %r" % paren) |
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115 str = match.groups()[0] |
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116 self.pred = [splitUp(aPred) for aPred in str.split(",")] |
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117 if not self.pred: |
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118 raise ValueError("empty parenthesized list in %r" |
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119 % versionPredicateStr) |
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120 else: |
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121 self.pred = [] |
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122 |
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123 def __str__(self): |
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124 if self.pred: |
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125 seq = [cond + " " + str(ver) for cond, ver in self.pred] |
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126 return self.name + " (" + ", ".join(seq) + ")" |
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127 else: |
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128 return self.name |
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129 |
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130 def satisfied_by(self, version): |
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131 """True if version is compatible with all the predicates in self. |
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132 The parameter version must be acceptable to the StrictVersion |
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133 constructor. It may be either a string or StrictVersion. |
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134 """ |
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135 for cond, ver in self.pred: |
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136 if not compmap[cond](version, ver): |
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137 return False |
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138 return True |
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139 |
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140 |
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141 _provision_rx = None |
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142 |
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143 def split_provision(value): |
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144 """Return the name and optional version number of a provision. |
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145 |
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146 The version number, if given, will be returned as a `StrictVersion` |
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147 instance, otherwise it will be `None`. |
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148 |
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149 >>> split_provision('mypkg') |
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150 ('mypkg', None) |
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151 >>> split_provision(' mypkg( 1.2 ) ') |
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152 ('mypkg', StrictVersion ('1.2')) |
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153 """ |
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154 global _provision_rx |
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155 if _provision_rx is None: |
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156 _provision_rx = re.compile( |
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157 r"([a-zA-Z_]\w*(?:\.[a-zA-Z_]\w*)*)(?:\s*\(\s*([^)\s]+)\s*\))?$", |
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158 re.ASCII) |
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159 value = value.strip() |
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160 m = _provision_rx.match(value) |
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161 if not m: |
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162 raise ValueError("illegal provides specification: %r" % value) |
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163 ver = m.group(2) or None |
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164 if ver: |
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165 ver = distutils.version.StrictVersion(ver) |
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166 return m.group(1), ver |