Mercurial > repos > guerler > springsuite

annotate planemo/lib/python3.7/site-packages/virtualenv/discovery/builtin.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 from __future__ import absolute_import, unicode_literals
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2
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3 import logging
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4 import os
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5 import sys
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6
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7 from virtualenv.info import IS_WIN
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8 from virtualenv.util.six import ensure_str, ensure_text
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9
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10 from .discover import Discover
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11 from .py_info import PythonInfo
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12 from .py_spec import PythonSpec
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13
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14
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15 class Builtin(Discover):
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16 def __init__(self, options):
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17 super(Builtin, self).__init__(options)
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18 self.python_spec = options.python
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19 self.app_data = options.app_data
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20
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21 @classmethod
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22 def add_parser_arguments(cls, parser):
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23 parser.add_argument(
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24 "-p",
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25 "--python",
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26 dest="python",
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27 metavar="py",
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28 help="target interpreter for which to create a virtual (either absolute path or identifier string)",
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29 default=sys.executable,
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30 )
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31
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32 def run(self):
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33 return get_interpreter(self.python_spec, self.app_data)
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34
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35 def __repr__(self):
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36 return ensure_str(self.__unicode__())
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37
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38 def __unicode__(self):
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39 return "{} discover of python_spec={!r}".format(self.__class__.__name__, self.python_spec)
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40
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41
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42 def get_interpreter(key, app_data=None):
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43 spec = PythonSpec.from_string_spec(key)
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44 logging.info("find interpreter for spec %r", spec)
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45 proposed_paths = set()
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46 for interpreter, impl_must_match in propose_interpreters(spec, app_data):
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47 key = interpreter.system_executable, impl_must_match
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48 if key in proposed_paths:
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49 continue
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50 logging.info("proposed %s", interpreter)
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51 if interpreter.satisfies(spec, impl_must_match):
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52 logging.debug("accepted %s", interpreter)
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53 return interpreter
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54 proposed_paths.add(key)
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55
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56
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57 def propose_interpreters(spec, app_data):
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58 # 1. if it's a path and exists
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59 if spec.path is not None:
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60 try:
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61 os.lstat(spec.path) # Windows Store Python does not work with os.path.exists, but does for os.lstat
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62 except OSError:
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63 if spec.is_abs:
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64 raise
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65 else:
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66 yield PythonInfo.from_exe(os.path.abspath(spec.path), app_data), True
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67 if spec.is_abs:
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68 return
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69 else:
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70 # 2. otherwise try with the current
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71 yield PythonInfo.current_system(app_data), True
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72
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73 # 3. otherwise fallback to platform default logic
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74 if IS_WIN:
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75 from .windows import propose_interpreters
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76
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77 for interpreter in propose_interpreters(spec, app_data):
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78 yield interpreter, True
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79 # finally just find on path, the path order matters (as the candidates are less easy to control by end user)
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80 paths = get_paths()
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81 tested_exes = set()
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82 for pos, path in enumerate(paths):
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83 path = ensure_text(path)
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84 logging.debug(LazyPathDump(pos, path))
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85 for candidate, match in possible_specs(spec):
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86 found = check_path(candidate, path)
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87 if found is not None:
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88 exe = os.path.abspath(found)
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89 if exe not in tested_exes:
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90 tested_exes.add(exe)
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91 interpreter = PathPythonInfo.from_exe(exe, app_data, raise_on_error=False)
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92 if interpreter is not None:
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93 yield interpreter, match
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94
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95
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96 def get_paths():
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97 path = os.environ.get(str("PATH"), None)
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98 if path is None:
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99 try:
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100 path = os.confstr("CS_PATH")
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101 except (AttributeError, ValueError):
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102 path = os.defpath
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103 if not path:
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104 paths = []
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105 else:
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106 paths = [p for p in path.split(os.pathsep) if os.path.exists(p)]
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107 return paths
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108
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109
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110 class LazyPathDump(object):
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111 def __init__(self, pos, path):
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112 self.pos = pos
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113 self.path = path
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114
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115 def __repr__(self):
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116 return ensure_str(self.__unicode__())
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117
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118 def __unicode__(self):
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119 content = "discover PATH[{}]={}".format(self.pos, self.path)
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120 if os.environ.get(str("_VIRTUALENV_DEBUG")): # this is the over the board debug
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121 content += " with =>"
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122 for file_name in os.listdir(self.path):
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123 try:
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124 file_path = os.path.join(self.path, file_name)
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125 if os.path.isdir(file_path) or not os.access(file_path, os.X_OK):
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126 continue
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127 except OSError:
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128 pass
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129 content += " "
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130 content += file_name
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131 return content
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132
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133
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134 def check_path(candidate, path):
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135 _, ext = os.path.splitext(candidate)
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136 if sys.platform == "win32" and ext != ".exe":
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137 candidate = candidate + ".exe"
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138 if os.path.isfile(candidate):
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139 return candidate
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140 candidate = os.path.join(path, candidate)
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141 if os.path.isfile(candidate):
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142 return candidate
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143 return None
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144
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145
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146 def possible_specs(spec):
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147 # 4. then maybe it's something exact on PATH - if it was direct lookup implementation no longer counts
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148 yield spec.str_spec, False
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149 # 5. or from the spec we can deduce a name on path that matches
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150 for exe, match in spec.generate_names():
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151 yield exe, match
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152
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153
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154 class PathPythonInfo(PythonInfo):
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155 """"""