Mercurial > repos > shellac > guppy_basecaller

annotate env/lib/python3.7/site-packages/virtualenv/discovery/windows/pep514.py @ 2:6af9afd405e9 draft

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
"planemo upload commit 0a63dd5f4d38a1f6944587f52a8cd79874177fc1"
author shellac
date Thu, 14 May 2020 14:56:58 -0400
parents 26e78fe6e8c4
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
0
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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1 """Implement https://www.python.org/dev/peps/pep-0514/ to discover interpreters - Windows only"""
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2 from __future__ import absolute_import, print_function, 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 from logging import basicConfig, getLogger
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7
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8 import six
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9
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10 if six.PY3:
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11 import winreg
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12 else:
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13 # noinspection PyUnresolvedReferences
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14 import _winreg as winreg
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15
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16 LOGGER = getLogger(__name__)
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17
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18
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19 def enum_keys(key):
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20 at = 0
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21 while True:
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22 try:
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23 yield winreg.EnumKey(key, at)
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24 except OSError:
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25 break
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26 at += 1
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27
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28
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29 def get_value(key, value_name):
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30 try:
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31 return winreg.QueryValueEx(key, value_name)[0]
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32 except OSError:
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33 return None
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34
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35
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36 def discover_pythons():
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37 for hive, hive_name, key, flags, default_arch in [
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38 (winreg.HKEY_CURRENT_USER, "HKEY_CURRENT_USER", r"Software\Python", 0, 64),
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39 (winreg.HKEY_LOCAL_MACHINE, "HKEY_LOCAL_MACHINE", r"Software\Python", winreg.KEY_WOW64_64KEY, 64),
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40 (winreg.HKEY_LOCAL_MACHINE, "HKEY_LOCAL_MACHINE", r"Software\Python", winreg.KEY_WOW64_32KEY, 32),
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41 ]:
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42 for spec in process_set(hive, hive_name, key, flags, default_arch):
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43 yield spec
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44
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45
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46 def process_set(hive, hive_name, key, flags, default_arch):
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47 try:
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48 with winreg.OpenKeyEx(hive, key, 0, winreg.KEY_READ | flags) as root_key:
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49 for company in enum_keys(root_key):
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50 if company == "PyLauncher": # reserved
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51 continue
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52 for spec in process_company(hive_name, company, root_key, default_arch):
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53 yield spec
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54 except OSError:
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55 pass
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56
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57
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58 def process_company(hive_name, company, root_key, default_arch):
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59 with winreg.OpenKeyEx(root_key, company) as company_key:
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60 for tag in enum_keys(company_key):
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61 spec = process_tag(hive_name, company, company_key, tag, default_arch)
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62 if spec is not None:
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63 yield spec
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64
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65
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66 def process_tag(hive_name, company, company_key, tag, default_arch):
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67 with winreg.OpenKeyEx(company_key, tag) as tag_key:
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68 version = load_version_data(hive_name, company, tag, tag_key)
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69 if version is not None: # if failed to get version bail
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70 major, minor, _ = version
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71 arch = load_arch_data(hive_name, company, tag, tag_key, default_arch)
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72 if arch is not None:
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73 exe_data = load_exe(hive_name, company, company_key, tag)
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74 if exe_data is not None:
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75 exe, args = exe_data
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76 name = str("python") if company == "PythonCore" else company
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77 return name, major, minor, arch, exe, args
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78
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79
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80 def load_exe(hive_name, company, company_key, tag):
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81 key_path = "{}/{}/{}".format(hive_name, company, tag)
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82 try:
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83 with winreg.OpenKeyEx(company_key, r"{}\InstallPath".format(tag)) as ip_key:
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84 with ip_key:
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85 exe = get_value(ip_key, "ExecutablePath")
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86 if exe is None:
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87 ip = get_value(ip_key, None)
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88 if ip is None:
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89 msg(key_path, "no ExecutablePath or default for it")
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90
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91 else:
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92 exe = os.path.join(ip, str("python.exe"))
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93 if exe is not None and os.path.exists(exe):
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94 args = get_value(ip_key, "ExecutableArguments")
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95 return exe, args
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96 else:
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97 msg(key_path, "exe does not exists {}".format(key_path, exe))
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98 except OSError:
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99 msg("{}/{}".format(key_path, "InstallPath"), "missing")
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100 return None
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101
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102
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103 def load_arch_data(hive_name, company, tag, tag_key, default_arch):
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104 arch_str = get_value(tag_key, "SysArchitecture")
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105 if arch_str is not None:
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106 key_path = "{}/{}/{}/SysArchitecture".format(hive_name, company, tag)
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107 try:
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108 return parse_arch(arch_str)
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109 except ValueError as sys_arch:
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110 msg(key_path, sys_arch)
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111 return default_arch
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112
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113
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114 def parse_arch(arch_str):
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115 if isinstance(arch_str, six.string_types):
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116 match = re.match(r"^(\d+)bit$", arch_str)
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117 if match:
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118 return int(next(iter(match.groups())))
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119 error = "invalid format {}".format(arch_str)
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120 else:
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121 error = "arch is not string: {}".format(repr(arch_str))
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122 raise ValueError(error)
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123
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124
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125 def load_version_data(hive_name, company, tag, tag_key):
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126 for candidate, key_path in [
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127 (get_value(tag_key, "SysVersion"), "{}/{}/{}/SysVersion".format(hive_name, company, tag)),
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128 (tag, "{}/{}/{}".format(hive_name, company, tag)),
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129 ]:
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130 if candidate is not None:
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131 try:
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132 return parse_version(candidate)
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133 except ValueError as sys_version:
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134 msg(key_path, sys_version)
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135 return None
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136
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137
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138 def parse_version(version_str):
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139 if isinstance(version_str, six.string_types):
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140 match = re.match(r"^(\d+)(?:\.(\d+))?(?:\.(\d+))?$", version_str)
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141 if match:
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142 return tuple(int(i) if i is not None else None for i in match.groups())
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143 error = "invalid format {}".format(version_str)
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144 else:
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145 error = "version is not string: {}".format(repr(version_str))
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146 raise ValueError(error)
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147
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148
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149 def msg(path, what):
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150 LOGGER.warning("PEP-514 violation in Windows Registry at {} error: {}".format(path, what))
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151
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152
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153 def _run():
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154 basicConfig()
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155 interpreters = []
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156 for spec in discover_pythons():
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157 interpreters.append(repr(spec))
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158 print("\n".join(sorted(interpreters)))
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159
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160
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161 if __name__ == "__main__":
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162 _run()