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annotate planemo/lib/python3.7/site-packages/virtualenv/seed/wheels/periodic_update.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 """
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2 Periodically update bundled versions.
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3 """
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4
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5 from __future__ import absolute_import, unicode_literals
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6
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7 import json
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8 import logging
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9 import os
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10 import ssl
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11 import subprocess
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12 import sys
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13 from datetime import datetime, timedelta
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14 from itertools import groupby
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15 from shutil import copy2
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16 from textwrap import dedent
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17 from threading import Thread
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18
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19 from six.moves.urllib.error import URLError
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20 from six.moves.urllib.request import urlopen
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21
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22 from virtualenv.app_data import AppDataDiskFolder
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23 from virtualenv.info import PY2
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24 from virtualenv.util.path import Path
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25 from virtualenv.util.subprocess import DETACHED_PROCESS, Popen
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26
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27 from ..wheels.embed import BUNDLE_SUPPORT
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28 from ..wheels.util import Wheel
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29
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30 if PY2:
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31 # on Python 2 datetime.strptime throws the error below if the import did not trigger on main thread
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32 # Failed to import _strptime because the import lock is held by
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33 try:
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34 import _strptime # noqa
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35 except ImportError: # pragma: no cov
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36 pass # pragma: no cov
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37
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38
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39 def periodic_update(distribution, for_py_version, wheel, search_dirs, app_data, do_periodic_update):
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40 if do_periodic_update:
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41 handle_auto_update(distribution, for_py_version, wheel, search_dirs, app_data)
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42
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43 now = datetime.now()
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44
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45 u_log = UpdateLog.from_app_data(app_data, distribution, for_py_version)
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46 u_log_older_than_hour = now - u_log.completed > timedelta(hours=1) if u_log.completed is not None else False
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47 for _, group in groupby(u_log.versions, key=lambda v: v.wheel.version_tuple[0:2]):
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48 version = next(group) # use only latest patch version per minor, earlier assumed to be buggy
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49 if wheel is not None and Path(version.filename).name == wheel.name:
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50 break
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51 if u_log.periodic is False or (u_log_older_than_hour and version.use(now)):
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52 updated_wheel = Wheel(app_data.house / version.filename)
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53 logging.debug("using %supdated wheel %s", "periodically " if updated_wheel else "", updated_wheel)
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54 wheel = updated_wheel
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55 break
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56
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57 return wheel
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58
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59
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60 def handle_auto_update(distribution, for_py_version, wheel, search_dirs, app_data):
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61 embed_update_log = app_data.embed_update_log(distribution, for_py_version)
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62 u_log = UpdateLog.from_dict(embed_update_log.read())
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63 if u_log.needs_update:
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64 u_log.periodic = True
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65 u_log.started = datetime.now()
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66 embed_update_log.write(u_log.to_dict())
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67 trigger_update(distribution, for_py_version, wheel, search_dirs, app_data, periodic=True)
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68
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69
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70 DATETIME_FMT = "%Y-%m-%dT%H:%M:%S.%fZ"
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71
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72
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73 def dump_datetime(value):
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74 return None if value is None else value.strftime(DATETIME_FMT)
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75
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76
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77 def load_datetime(value):
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78 return None if value is None else datetime.strptime(value, DATETIME_FMT)
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79
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80
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81 class NewVersion(object):
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82 def __init__(self, filename, found_date, release_date):
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83 self.filename = filename
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84 self.found_date = found_date
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85 self.release_date = release_date
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86
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87 @classmethod
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88 def from_dict(cls, dictionary):
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89 return cls(
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90 filename=dictionary["filename"],
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91 found_date=load_datetime(dictionary["found_date"]),
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92 release_date=load_datetime(dictionary["release_date"]),
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93 )
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94
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95 def to_dict(self):
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96 return {
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97 "filename": self.filename,
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98 "release_date": dump_datetime(self.release_date),
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99 "found_date": dump_datetime(self.found_date),
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100 }
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101
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102 def use(self, now):
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103 compare_from = self.release_date or self.found_date
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104 return now - compare_from >= timedelta(days=28)
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105
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106 def __repr__(self):
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107 return "{}(filename={}), found_date={}, release_date={})".format(
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108 self.__class__.__name__, self.filename, self.found_date, self.release_date,
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109 )
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110
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111 def __eq__(self, other):
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112 return type(self) == type(other) and all(
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113 getattr(self, k) == getattr(other, k) for k in ["filename", "release_date", "found_date"]
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114 )
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115
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116 def __ne__(self, other):
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117 return not (self == other)
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118
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119 @property
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120 def wheel(self):
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121 return Wheel(Path(self.filename))
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122
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123
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124 class UpdateLog(object):
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125 def __init__(self, started, completed, versions, periodic):
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126 self.started = started
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127 self.completed = completed
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128 self.versions = versions
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129 self.periodic = periodic
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130
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131 @classmethod
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132 def from_dict(cls, dictionary):
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133 if dictionary is None:
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134 dictionary = {}
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135 return cls(
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136 load_datetime(dictionary.get("started")),
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137 load_datetime(dictionary.get("completed")),
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138 [NewVersion.from_dict(v) for v in dictionary.get("versions", [])],
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139 dictionary.get("periodic"),
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140 )
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141
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142 @classmethod
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143 def from_app_data(cls, app_data, distribution, for_py_version):
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144 raw_json = app_data.embed_update_log(distribution, for_py_version).read()
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145 return cls.from_dict(raw_json)
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146
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147 def to_dict(self):
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148 return {
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149 "started": dump_datetime(self.started),
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150 "completed": dump_datetime(self.completed),
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151 "periodic": self.periodic,
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152 "versions": [r.to_dict() for r in self.versions],
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153 }
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154
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155 @property
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156 def needs_update(self):
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157 now = datetime.now()
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158 if self.completed is None: # never completed
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159 return self._check_start(now)
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160 else:
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161 if now - self.completed <= timedelta(days=14):
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162 return False
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163 return self._check_start(now)
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164
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165 def _check_start(self, now):
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166 return self.started is None or now - self.started > timedelta(hours=1)
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167
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168
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169 def trigger_update(distribution, for_py_version, wheel, search_dirs, app_data, periodic):
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170 wheel_path = None if wheel is None else str(wheel.path)
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171 cmd = [
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172 sys.executable,
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173 "-c",
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174 dedent(
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175 """
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176 from virtualenv.report import setup_report, MAX_LEVEL
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177 from virtualenv.seed.wheels.periodic_update import do_update
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178 setup_report(MAX_LEVEL, show_pid=True)
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179 do_update({!r}, {!r}, {!r}, {!r}, {!r}, {!r})
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180 """,
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181 )
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182 .strip()
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183 .format(distribution, for_py_version, wheel_path, str(app_data), [str(p) for p in search_dirs], periodic),
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184 ]
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185 debug = os.environ.get(str("_VIRTUALENV_PERIODIC_UPDATE_INLINE")) == str("1")
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186 pipe = None if debug else subprocess.PIPE
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187 kwargs = {"stdout": pipe, "stderr": pipe}
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188 if not debug and sys.platform == "win32":
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189 kwargs["creationflags"] = DETACHED_PROCESS
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190 process = Popen(cmd, **kwargs)
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191 logging.info(
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192 "triggered periodic upgrade of %s%s (for python %s) via background process having PID %d",
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193 distribution,
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194 "" if wheel is None else "=={}".format(wheel.version),
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195 for_py_version,
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196 process.pid,
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197 )
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198 if debug:
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199 process.communicate() # on purpose not called to make it a background process
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200
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201
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202 def do_update(distribution, for_py_version, embed_filename, app_data, search_dirs, periodic):
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203 versions = None
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204 try:
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205 versions = _run_do_update(app_data, distribution, embed_filename, for_py_version, periodic, search_dirs)
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206 finally:
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207 logging.debug("done %s %s with %s", distribution, for_py_version, versions)
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208 return versions
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209
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210
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211 def _run_do_update(app_data, distribution, embed_filename, for_py_version, periodic, search_dirs):
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212 from virtualenv.seed.wheels import acquire
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213
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214 wheel_filename = None if embed_filename is None else Path(embed_filename)
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215 embed_version = None if wheel_filename is None else Wheel(wheel_filename).version_tuple
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216 app_data = AppDataDiskFolder(app_data) if isinstance(app_data, str) else app_data
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217 search_dirs = [Path(p) if isinstance(p, str) else p for p in search_dirs]
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218 wheelhouse = app_data.house
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219 embed_update_log = app_data.embed_update_log(distribution, for_py_version)
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220 u_log = UpdateLog.from_dict(embed_update_log.read())
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221 now = datetime.now()
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222 if wheel_filename is not None:
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223 dest = wheelhouse / wheel_filename.name
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224 if not dest.exists():
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225 copy2(str(wheel_filename), str(wheelhouse))
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226 last, last_version, versions = None, None, []
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227 while last is None or not last.use(now):
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228 download_time = datetime.now()
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229 dest = acquire.download_wheel(
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230 distribution=distribution,
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231 version_spec=None if last_version is None else "<{}".format(last_version),
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232 for_py_version=for_py_version,
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233 search_dirs=search_dirs,
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234 app_data=app_data,
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235 to_folder=wheelhouse,
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236 )
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237 if dest is None or (u_log.versions and u_log.versions[0].filename == dest.name):
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238 break
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239 release_date = release_date_for_wheel_path(dest.path)
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240 last = NewVersion(filename=dest.path.name, release_date=release_date, found_date=download_time)
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241 logging.info("detected %s in %s", last, datetime.now() - download_time)
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242 versions.append(last)
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243 last_wheel = Wheel(Path(last.filename))
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244 last_version = last_wheel.version
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245 if embed_version is not None:
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246 if embed_version >= last_wheel.version_tuple: # stop download if we reach the embed version
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247 break
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248 u_log.periodic = periodic
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249 if not u_log.periodic:
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250 u_log.started = now
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251 u_log.versions = versions + u_log.versions
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252 u_log.completed = datetime.now()
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253 embed_update_log.write(u_log.to_dict())
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254 return versions
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255
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256
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257 def release_date_for_wheel_path(dest):
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258 wheel = Wheel(dest)
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259 # the most accurate is to ask PyPi - e.g. https://pypi.org/pypi/pip/json,
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260 # see https://warehouse.pypa.io/api-reference/json/ for more details
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261 content = _pypi_get_distribution_info_cached(wheel.distribution)
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262 if content is not None:
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263 try:
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264 upload_time = content["releases"][wheel.version][0]["upload_time"]
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265 return datetime.strptime(upload_time, "%Y-%m-%dT%H:%M:%S")
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266 except Exception as exception:
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267 logging.error("could not load release date %s because %r", content, exception)
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268 return None
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269
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270
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271 def _request_context():
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272 yield None
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273 # fallback to non verified HTTPS (the information we request is not sensitive, so fallback)
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274 yield ssl._create_unverified_context() # noqa
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275
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276
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277 _PYPI_CACHE = {}
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278
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279
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280 def _pypi_get_distribution_info_cached(distribution):
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281 if distribution not in _PYPI_CACHE:
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282 _PYPI_CACHE[distribution] = _pypi_get_distribution_info(distribution)
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283 return _PYPI_CACHE[distribution]
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284
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285
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286 def _pypi_get_distribution_info(distribution):
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287 content, url = None, "https://pypi.org/pypi/{}/json".format(distribution)
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288 try:
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289 for context in _request_context():
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290 try:
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291 with urlopen(url, context=context) as file_handler:
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292 content = json.load(file_handler)
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293 break
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294 except URLError as exception:
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295 logging.error("failed to access %s because %r", url, exception)
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296 except Exception as exception:
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297 logging.error("failed to access %s because %r", url, exception)
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298 return content
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299
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300
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301 def manual_upgrade(app_data):
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302 threads = []
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303
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304 for for_py_version, distribution_to_package in BUNDLE_SUPPORT.items():
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305 # load extra search dir for the given for_py
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306 for distribution in distribution_to_package.keys():
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307 thread = Thread(target=_run_manual_upgrade, args=(app_data, distribution, for_py_version))
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308 thread.start()
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309 threads.append(thread)
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310
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311 for thread in threads:
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312 thread.join()
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313
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314
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315 def _run_manual_upgrade(app_data, distribution, for_py_version):
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316 start = datetime.now()
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317 from .bundle import from_bundle
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318
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319 current = from_bundle(
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320 distribution=distribution,
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321 version=None,
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322 for_py_version=for_py_version,
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323 search_dirs=[],
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324 app_data=app_data,
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325 do_periodic_update=False,
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326 )
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327 logging.warning(
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328 "upgrade %s for python %s with current %s",
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329 distribution,
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330 for_py_version,
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331 "" if current is None else current.name,
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332 )
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333 versions = do_update(
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334 distribution=distribution,
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335 for_py_version=for_py_version,
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336 embed_filename=current.path,
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337 app_data=app_data,
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338 search_dirs=[],
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339 periodic=False,
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340 )
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341 msg = "upgraded %s for python %s in %s {}".format(
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342 "new entries found:\n%s" if versions else "no new versions found",
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343 )
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344 args = [
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345 distribution,
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346 for_py_version,
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347 datetime.now() - start,
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348 ]
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349 if versions:
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350 args.append("\n".join("\t{}".format(v) for v in versions))
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351 logging.warning(msg, *args)
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352
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353
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354 __all__ = (
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355 "periodic_update",
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356 "do_update",
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357 "manual_upgrade",
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358 "NewVersion",
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359 "UpdateLog",
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360 "load_datetime",
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361 "dump_datetime",
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362 "trigger_update",
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363 "release_date_for_wheel_path",
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364 )