Mercurial > repos > guerler > springsuite

annotate planemo/lib/python3.7/site-packages/virtualenv/discovery/py_spec.py @ 1:56ad4e20f292 draft

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"planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
author guerler
date Fri, 31 Jul 2020 00:32:28 -0400
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1
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1 """A Python specification is an abstract requirement definition of a interpreter"""
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2 from __future__ import absolute_import, unicode_literals
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3
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4 import os
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5 import re
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6 import sys
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7 from collections import OrderedDict
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8
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9 from virtualenv.info import fs_is_case_sensitive
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10 from virtualenv.util.six import ensure_str
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11
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12 PATTERN = re.compile(r"^(?P<impl>[a-zA-Z]+)?(?P<version>[0-9.]+)?(?:-(?P<arch>32|64))?$")
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13 IS_WIN = sys.platform == "win32"
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14
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15
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16 class PythonSpec(object):
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17 """Contains specification about a Python Interpreter"""
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18
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19 def __init__(self, str_spec, implementation, major, minor, micro, architecture, path):
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20 self.str_spec = str_spec
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21 self.implementation = implementation
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22 self.major = major
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23 self.minor = minor
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24 self.micro = micro
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25 self.architecture = architecture
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26 self.path = path
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27
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28 @classmethod
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29 def from_string_spec(cls, string_spec):
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30 impl, major, minor, micro, arch, path = None, None, None, None, None, None
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31 if os.path.isabs(string_spec):
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32 path = string_spec
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33 else:
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34 ok = False
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35 match = re.match(PATTERN, string_spec)
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36 if match:
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37
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38 def _int_or_none(val):
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39 return None if val is None else int(val)
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40
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41 try:
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42 groups = match.groupdict()
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43 version = groups["version"]
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44 if version is not None:
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45 versions = tuple(int(i) for i in version.split(".") if i)
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46 if len(versions) > 3:
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47 raise ValueError
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48 if len(versions) == 3:
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49 major, minor, micro = versions
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50 elif len(versions) == 2:
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51 major, minor = versions
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52 elif len(versions) == 1:
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53 version_data = versions[0]
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54 major = int(str(version_data)[0]) # first digit major
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55 if version_data > 9:
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56 minor = int(str(version_data)[1:])
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57 ok = True
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58 except ValueError:
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59 pass
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60 else:
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61 impl = groups["impl"]
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62 if impl == "py" or impl == "python":
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63 impl = "CPython"
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64 arch = _int_or_none(groups["arch"])
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65
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66 if not ok:
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67 path = string_spec
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68
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69 return cls(string_spec, impl, major, minor, micro, arch, path)
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70
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71 def generate_names(self):
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72 impls = OrderedDict()
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73 if self.implementation:
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74 # first consider implementation as it is
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75 impls[self.implementation] = False
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76 if fs_is_case_sensitive():
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77 # for case sensitive file systems consider lower and upper case versions too
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78 # trivia: MacBooks and all pre 2018 Windows-es were case insensitive by default
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79 impls[self.implementation.lower()] = False
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80 impls[self.implementation.upper()] = False
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81 impls["python"] = True # finally consider python as alias, implementation must match now
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82 version = self.major, self.minor, self.micro
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83 try:
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84 version = version[: version.index(None)]
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85 except ValueError:
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86 pass
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87 for impl, match in impls.items():
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88 for at in range(len(version), -1, -1):
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89 cur_ver = version[0:at]
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90 spec = "{}{}".format(impl, ".".join(str(i) for i in cur_ver))
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91 yield spec, match
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92
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93 @property
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94 def is_abs(self):
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95 return self.path is not None and os.path.isabs(self.path)
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96
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97 def satisfies(self, spec):
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98 """called when there's a candidate metadata spec to see if compatible - e.g. PEP-514 on Windows"""
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99 if spec.is_abs and self.is_abs and self.path != spec.path:
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100 return False
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101 if spec.implementation is not None and spec.implementation.lower() != self.implementation.lower():
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102 return False
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103 if spec.architecture is not None and spec.architecture != self.architecture:
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104 return False
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105
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106 for our, req in zip((self.major, self.minor, self.micro), (spec.major, spec.minor, spec.micro)):
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107 if req is not None and our is not None and our != req:
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108 return False
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109 return True
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110
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111 def __unicode__(self):
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112 return "{}({})".format(
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113 type(self).__name__,
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114 ", ".join(
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115 "{}={}".format(k, getattr(self, k))
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116 for k in ("implementation", "major", "minor", "micro", "architecture", "path")
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117 if getattr(self, k) is not None
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118 ),
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119 )
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120
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121 def __repr__(self):
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122 return ensure_str(self.__unicode__())