Mercurial > repos > shellac > sam_consensus_v3
annotate env/lib/python3.9/site-packages/virtualenv/create/creator.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 from __future__ import absolute_import, print_function, unicode_literals |
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2 |
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3 import json |
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4 import logging |
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5 import os |
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6 import sys |
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7 from abc import ABCMeta, abstractmethod |
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8 from argparse import ArgumentTypeError |
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9 from ast import literal_eval |
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10 from collections import OrderedDict |
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11 from textwrap import dedent |
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12 |
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13 from six import add_metaclass |
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14 |
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15 from virtualenv.discovery.cached_py_info import LogCmd |
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16 from virtualenv.info import WIN_CPYTHON_2 |
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17 from virtualenv.util.path import Path, safe_delete |
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18 from virtualenv.util.six import ensure_str, ensure_text |
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19 from virtualenv.util.subprocess import run_cmd |
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20 from virtualenv.version import __version__ |
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21 |
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22 from .pyenv_cfg import PyEnvCfg |
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23 |
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24 HERE = Path(os.path.abspath(__file__)).parent |
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25 DEBUG_SCRIPT = HERE / "debug.py" |
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26 |
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27 |
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28 class CreatorMeta(object): |
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29 def __init__(self): |
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30 self.error = None |
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31 |
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32 |
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33 @add_metaclass(ABCMeta) |
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34 class Creator(object): |
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35 """A class that given a python Interpreter creates a virtual environment""" |
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36 |
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37 def __init__(self, options, interpreter): |
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38 """Construct a new virtual environment creator. |
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39 |
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40 :param options: the CLI option as parsed from :meth:`add_parser_arguments` |
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41 :param interpreter: the interpreter to create virtual environment from |
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42 """ |
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43 self.interpreter = interpreter |
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44 self._debug = None |
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45 self.dest = Path(options.dest) |
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46 self.clear = options.clear |
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47 self.no_vcs_ignore = options.no_vcs_ignore |
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48 self.pyenv_cfg = PyEnvCfg.from_folder(self.dest) |
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49 self.app_data = options.app_data |
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50 self.env = options.env |
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51 |
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52 def __repr__(self): |
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53 return ensure_str(self.__unicode__()) |
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54 |
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55 def __unicode__(self): |
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56 return "{}({})".format(self.__class__.__name__, ", ".join("{}={}".format(k, v) for k, v in self._args())) |
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57 |
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58 def _args(self): |
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59 return [ |
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60 ("dest", ensure_text(str(self.dest))), |
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61 ("clear", self.clear), |
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62 ("no_vcs_ignore", self.no_vcs_ignore), |
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63 ] |
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64 |
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65 @classmethod |
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66 def can_create(cls, interpreter): |
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67 """Determine if we can create a virtual environment. |
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68 |
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69 :param interpreter: the interpreter in question |
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70 :return: ``None`` if we can't create, any other object otherwise that will be forwarded to \ |
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71 :meth:`add_parser_arguments` |
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72 """ |
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73 return True |
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74 |
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75 @classmethod |
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76 def add_parser_arguments(cls, parser, interpreter, meta, app_data): |
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77 """Add CLI arguments for the creator. |
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78 |
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79 :param parser: the CLI parser |
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80 :param app_data: the application data folder |
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81 :param interpreter: the interpreter we're asked to create virtual environment for |
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82 :param meta: value as returned by :meth:`can_create` |
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83 """ |
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84 parser.add_argument( |
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85 "dest", |
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86 help="directory to create virtualenv at", |
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87 type=cls.validate_dest, |
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88 ) |
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89 parser.add_argument( |
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90 "--clear", |
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91 dest="clear", |
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92 action="store_true", |
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93 help="remove the destination directory if exist before starting (will overwrite files otherwise)", |
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94 default=False, |
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95 ) |
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96 parser.add_argument( |
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97 "--no-vcs-ignore", |
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98 dest="no_vcs_ignore", |
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99 action="store_true", |
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100 help="don't create VCS ignore directive in the destination directory", |
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101 default=False, |
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102 ) |
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103 |
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104 @abstractmethod |
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105 def create(self): |
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106 """Perform the virtual environment creation.""" |
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107 raise NotImplementedError |
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108 |
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109 @classmethod |
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110 def validate_dest(cls, raw_value): |
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111 """No path separator in the path, valid chars and must be write-able""" |
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112 |
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113 def non_write_able(dest, value): |
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114 common = Path(*os.path.commonprefix([value.parts, dest.parts])) |
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115 raise ArgumentTypeError( |
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116 "the destination {} is not write-able at {}".format(dest.relative_to(common), common), |
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117 ) |
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118 |
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119 # the file system must be able to encode |
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120 # note in newer CPython this is always utf-8 https://www.python.org/dev/peps/pep-0529/ |
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121 encoding = sys.getfilesystemencoding() |
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122 refused = OrderedDict() |
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123 kwargs = {"errors": "ignore"} if encoding != "mbcs" else {} |
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124 for char in ensure_text(raw_value): |
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125 try: |
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126 trip = char.encode(encoding, **kwargs).decode(encoding) |
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127 if trip == char: |
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128 continue |
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129 raise ValueError(trip) |
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130 except ValueError: |
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131 refused[char] = None |
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132 if refused: |
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133 raise ArgumentTypeError( |
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134 "the file system codec ({}) cannot handle characters {!r} within {!r}".format( |
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135 encoding, |
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136 "".join(refused.keys()), |
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137 raw_value, |
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138 ), |
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139 ) |
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140 if os.pathsep in raw_value: |
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141 raise ArgumentTypeError( |
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142 "destination {!r} must not contain the path separator ({}) as this would break " |
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143 "the activation scripts".format(raw_value, os.pathsep), |
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144 ) |
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145 |
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146 value = Path(raw_value) |
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147 if value.exists() and value.is_file(): |
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148 raise ArgumentTypeError("the destination {} already exists and is a file".format(value)) |
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149 if (3, 3) <= sys.version_info <= (3, 6): |
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150 # pre 3.6 resolve is always strict, aka must exists, sidestep by using os.path operation |
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151 dest = Path(os.path.realpath(raw_value)) |
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152 else: |
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153 dest = Path(os.path.abspath(str(value))).resolve() # on Windows absolute does not imply resolve so use both |
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154 value = dest |
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155 while dest: |
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156 if dest.exists(): |
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157 if os.access(ensure_text(str(dest)), os.W_OK): |
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158 break |
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159 else: |
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160 non_write_able(dest, value) |
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161 base, _ = dest.parent, dest.name |
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162 if base == dest: |
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163 non_write_able(dest, value) # pragma: no cover |
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164 dest = base |
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165 return str(value) |
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166 |
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167 def run(self): |
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168 if self.dest.exists() and self.clear: |
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169 logging.debug("delete %s", self.dest) |
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170 safe_delete(self.dest) |
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171 self.create() |
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172 self.set_pyenv_cfg() |
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173 if not self.no_vcs_ignore: |
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174 self.setup_ignore_vcs() |
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175 |
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176 def set_pyenv_cfg(self): |
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177 self.pyenv_cfg.content = OrderedDict() |
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178 self.pyenv_cfg["home"] = self.interpreter.system_exec_prefix |
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179 self.pyenv_cfg["implementation"] = self.interpreter.implementation |
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180 self.pyenv_cfg["version_info"] = ".".join(str(i) for i in self.interpreter.version_info) |
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181 self.pyenv_cfg["virtualenv"] = __version__ |
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182 |
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183 def setup_ignore_vcs(self): |
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184 """Generate ignore instructions for version control systems.""" |
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185 # mark this folder to be ignored by VCS, handle https://www.python.org/dev/peps/pep-0610/#registered-vcs |
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186 git_ignore = self.dest / ".gitignore" |
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187 if not git_ignore.exists(): |
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188 git_ignore.write_text( |
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189 dedent( |
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190 """ |
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191 # created by virtualenv automatically |
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192 * |
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193 """, |
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194 ).lstrip(), |
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195 ) |
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196 # Mercurial - does not support the .hgignore file inside a subdirectory directly, but only if included via the |
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197 # subinclude directive from root, at which point on might as well ignore the directory itself, see |
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198 # https://www.selenic.com/mercurial/hgignore.5.html for more details |
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199 # Bazaar - does not support ignore files in sub-directories, only at root level via .bzrignore |
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200 # Subversion - does not support ignore files, requires direct manipulation with the svn tool |
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201 |
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202 @property |
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203 def debug(self): |
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204 """ |
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205 :return: debug information about the virtual environment (only valid after :meth:`create` has run) |
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206 """ |
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207 if self._debug is None and self.exe is not None: |
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208 self._debug = get_env_debug_info(self.exe, self.debug_script(), self.app_data, self.env) |
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209 return self._debug |
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210 |
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211 # noinspection PyMethodMayBeStatic |
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212 def debug_script(self): |
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213 return DEBUG_SCRIPT |
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214 |
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215 |
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216 def get_env_debug_info(env_exe, debug_script, app_data, env): |
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217 env = env.copy() |
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218 env.pop(str("PYTHONPATH"), None) |
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219 |
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220 with app_data.ensure_extracted(debug_script) as debug_script: |
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221 cmd = [str(env_exe), str(debug_script)] |
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222 if WIN_CPYTHON_2: |
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223 cmd = [ensure_text(i) for i in cmd] |
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224 logging.debug(str("debug via %r"), LogCmd(cmd)) |
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225 code, out, err = run_cmd(cmd) |
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226 |
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227 # noinspection PyBroadException |
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228 try: |
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229 if code != 0: |
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230 result = literal_eval(out) |
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231 else: |
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232 result = json.loads(out) |
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233 if err: |
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234 result["err"] = err |
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235 except Exception as exception: |
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236 return {"out": out, "err": err, "returncode": code, "exception": repr(exception)} |
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237 if "sys" in result and "path" in result["sys"]: |
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238 del result["sys"]["path"][0] |
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239 return result |