Mercurial > libervia-backend

annotate ez_setup.py @ 1817:7ef0f5f90862

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author Goffi <goffi@goffi.org>
date Fri, 22 Jan 2016 20:24:17 +0100
parents 16ce9a6580a3
children
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1 #!/usr/bin/env python
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2 """Bootstrap setuptools installation
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3
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4 To use setuptools in your package's setup.py, include this
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5 file in the same directory and add this to the top of your setup.py::
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6
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7 from ez_setup import use_setuptools
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8 use_setuptools()
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9
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10 To require a specific version of setuptools, set a download
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11 mirror, or use an alternate download directory, simply supply
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12 the appropriate options to ``use_setuptools()``.
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13
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14 This file can also be run as a script to install or upgrade setuptools.
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15 """
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16 import os
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17 import shutil
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18 import sys
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19 import tempfile
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20 import zipfile
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21 import optparse
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22 import subprocess
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23 import platform
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24 import textwrap
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25 import contextlib
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26
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27 from distutils import log
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28
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29 try:
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30 from urllib.request import urlopen
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31 except ImportError:
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32 from urllib2 import urlopen
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33
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34 try:
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35 from site import USER_SITE
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36 except ImportError:
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37 USER_SITE = None
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38
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39 DEFAULT_VERSION = "5.5"
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40 DEFAULT_URL = "https://pypi.python.org/packages/source/s/setuptools/"
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42 def _python_cmd(*args):
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43 """
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44 Return True if the command succeeded.
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45 """
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46 args = (sys.executable,) + args
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47 return subprocess.call(args) == 0
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50 def _install(archive_filename, install_args=()):
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51 with archive_context(archive_filename):
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52 # installing
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53 log.warn('Installing Setuptools')
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54 if not _python_cmd('setup.py', 'install', *install_args):
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55 log.warn('Something went wrong during the installation.')
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56 log.warn('See the error message above.')
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57 # exitcode will be 2
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58 return 2
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61 def _build_egg(egg, archive_filename, to_dir):
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62 with archive_context(archive_filename):
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63 # building an egg
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64 log.warn('Building a Setuptools egg in %s', to_dir)
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65 _python_cmd('setup.py', '-q', 'bdist_egg', '--dist-dir', to_dir)
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66 # returning the result
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67 log.warn(egg)
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68 if not os.path.exists(egg):
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69 raise IOError('Could not build the egg.')
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72 class ContextualZipFile(zipfile.ZipFile):
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73 """
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74 Supplement ZipFile class to support context manager for Python 2.6
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75 """
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76
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77 def __enter__(self):
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78 return self
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79
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80 def __exit__(self, type, value, traceback):
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81 self.close()
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82
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83 def __new__(cls, *args, **kwargs):
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84 """
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85 Construct a ZipFile or ContextualZipFile as appropriate
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86 """
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87 if hasattr(zipfile.ZipFile, '__exit__'):
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88 return zipfile.ZipFile(*args, **kwargs)
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89 return super(ContextualZipFile, cls).__new__(cls)
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92 @contextlib.contextmanager
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93 def archive_context(filename):
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94 # extracting the archive
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95 tmpdir = tempfile.mkdtemp()
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96 log.warn('Extracting in %s', tmpdir)
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97 old_wd = os.getcwd()
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98 try:
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99 os.chdir(tmpdir)
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100 with ContextualZipFile(filename) as archive:
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101 archive.extractall()
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102
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103 # going in the directory
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104 subdir = os.path.join(tmpdir, os.listdir(tmpdir)[0])
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105 os.chdir(subdir)
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106 log.warn('Now working in %s', subdir)
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107 yield
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108
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109 finally:
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110 os.chdir(old_wd)
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111 shutil.rmtree(tmpdir)
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113
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114 def _do_download(version, download_base, to_dir, download_delay):
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115 egg = os.path.join(to_dir, 'setuptools-%s-py%d.%d.egg'
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116 % (version, sys.version_info[0], sys.version_info[1]))
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117 if not os.path.exists(egg):
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118 archive = download_setuptools(version, download_base,
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119 to_dir, download_delay)
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120 _build_egg(egg, archive, to_dir)
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121 sys.path.insert(0, egg)
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123 # Remove previously-imported pkg_resources if present (see
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124 # https://bitbucket.org/pypa/setuptools/pull-request/7/ for details).
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diff changeset
125 if 'pkg_resources' in sys.modules:
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
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diff changeset
126 del sys.modules['pkg_resources']
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
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diff changeset
127
231
f68a9a429c88 added distribute bootstrap file
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diff changeset
128 import setuptools
f68a9a429c88 added distribute bootstrap file
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diff changeset
129 setuptools.bootstrap_install_from = egg
f68a9a429c88 added distribute bootstrap file
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diff changeset
130
f68a9a429c88 added distribute bootstrap file
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parents:
diff changeset
131
f68a9a429c88 added distribute bootstrap file
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132 def use_setuptools(version=DEFAULT_VERSION, download_base=DEFAULT_URL,
1155
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
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diff changeset
133 to_dir=os.curdir, download_delay=15):
231
f68a9a429c88 added distribute bootstrap file
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diff changeset
134 to_dir = os.path.abspath(to_dir)
1155
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
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diff changeset
135 rep_modules = 'pkg_resources', 'setuptools'
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
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diff changeset
136 imported = set(sys.modules).intersection(rep_modules)
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
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diff changeset
137 try:
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
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diff changeset
138 import pkg_resources
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
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diff changeset
139 except ImportError:
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
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diff changeset
140 return _do_download(version, download_base, to_dir, download_delay)
231
f68a9a429c88 added distribute bootstrap file
Goffi <goffi@goffi.org>
parents:
diff changeset
141 try:
1155
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
Goffi <goffi@goffi.org>
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diff changeset
142 pkg_resources.require("setuptools>=" + version)
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
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diff changeset
143 return
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
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diff changeset
144 except pkg_resources.DistributionNotFound:
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
Goffi <goffi@goffi.org>
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diff changeset
145 return _do_download(version, download_base, to_dir, download_delay)
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
Goffi <goffi@goffi.org>
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diff changeset
146 except pkg_resources.VersionConflict as VC_err:
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
Goffi <goffi@goffi.org>
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diff changeset
147 if imported:
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
Goffi <goffi@goffi.org>
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diff changeset
148 msg = textwrap.dedent("""
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
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diff changeset
149 The required version of setuptools (>={version}) is not available,
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
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diff changeset
150 and can't be installed while this script is running. Please
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
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diff changeset
151 install a more recent version first, using
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
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diff changeset
152 'easy_install -U setuptools'.
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
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diff changeset
153
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
Goffi <goffi@goffi.org>
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diff changeset
154 (Currently using {VC_err.args[0]!r})
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
Goffi <goffi@goffi.org>
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diff changeset
155 """).format(VC_err=VC_err, version=version)
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
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diff changeset
156 sys.stderr.write(msg)
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
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diff changeset
157 sys.exit(2)
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
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diff changeset
158
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
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diff changeset
159 # otherwise, reload ok
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
Goffi <goffi@goffi.org>
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diff changeset
160 del pkg_resources, sys.modules['pkg_resources']
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
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diff changeset
161 return _do_download(version, download_base, to_dir, download_delay)
843
efd92a645220 misc: update distribute_setup.py to version 0.6.49
Thomas Preud'homme <robotux@celest.fr>
parents: 586
diff changeset
162
1155
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
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diff changeset
163 def _clean_check(cmd, target):
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
Goffi <goffi@goffi.org>
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diff changeset
164 """
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
Goffi <goffi@goffi.org>
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diff changeset
165 Run the command to download target. If the command fails, clean up before
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
Goffi <goffi@goffi.org>
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diff changeset
166 re-raising the error.
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
Goffi <goffi@goffi.org>
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diff changeset
167 """
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
Goffi <goffi@goffi.org>
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diff changeset
168 try:
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
Goffi <goffi@goffi.org>
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diff changeset
169 subprocess.check_call(cmd)
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
Goffi <goffi@goffi.org>
parents: 843
diff changeset
170 except subprocess.CalledProcessError:
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
Goffi <goffi@goffi.org>
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diff changeset
171 if os.access(target, os.F_OK):
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
Goffi <goffi@goffi.org>
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diff changeset
172 os.unlink(target)
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
Goffi <goffi@goffi.org>
parents: 843
diff changeset
173 raise
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
Goffi <goffi@goffi.org>
parents: 843
diff changeset
174
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
Goffi <goffi@goffi.org>
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diff changeset
175 def download_file_powershell(url, target):
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
Goffi <goffi@goffi.org>
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diff changeset
176 """
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
Goffi <goffi@goffi.org>
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diff changeset
177 Download the file at url to target using Powershell (which will validate
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
Goffi <goffi@goffi.org>
parents: 843
diff changeset
178 trust). Raise an exception if the command cannot complete.
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
Goffi <goffi@goffi.org>
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diff changeset
179 """
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
Goffi <goffi@goffi.org>
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diff changeset
180 target = os.path.abspath(target)
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
Goffi <goffi@goffi.org>
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diff changeset
181 ps_cmd = (
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
Goffi <goffi@goffi.org>
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diff changeset
182 "[System.Net.WebRequest]::DefaultWebProxy.Credentials = "
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
Goffi <goffi@goffi.org>
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diff changeset
183 "[System.Net.CredentialCache]::DefaultCredentials; "
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
Goffi <goffi@goffi.org>
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diff changeset
184 "(new-object System.Net.WebClient).DownloadFile(%(url)r, %(target)r)"
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
Goffi <goffi@goffi.org>
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diff changeset
185 % vars()
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
Goffi <goffi@goffi.org>
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diff changeset
186 )
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
Goffi <goffi@goffi.org>
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diff changeset
187 cmd = [
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
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diff changeset
188 'powershell',
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
Goffi <goffi@goffi.org>
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diff changeset
189 '-Command',
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
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diff changeset
190 ps_cmd,
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
Goffi <goffi@goffi.org>
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diff changeset
191 ]
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
Goffi <goffi@goffi.org>
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diff changeset
192 _clean_check(cmd, target)
843
efd92a645220 misc: update distribute_setup.py to version 0.6.49
Thomas Preud'homme <robotux@celest.fr>
parents: 586
diff changeset
193
1155
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
Goffi <goffi@goffi.org>
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diff changeset
194 def has_powershell():
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
Goffi <goffi@goffi.org>
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diff changeset
195 if platform.system() != 'Windows':
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
Goffi <goffi@goffi.org>
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diff changeset
196 return False
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
Goffi <goffi@goffi.org>
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diff changeset
197 cmd = ['powershell', '-Command', 'echo test']
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
Goffi <goffi@goffi.org>
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diff changeset
198 with open(os.path.devnull, 'wb') as devnull:
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
Goffi <goffi@goffi.org>
parents: 843
diff changeset
199 try:
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
Goffi <goffi@goffi.org>
parents: 843
diff changeset
200 subprocess.check_call(cmd, stdout=devnull, stderr=devnull)
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
Goffi <goffi@goffi.org>
parents: 843
diff changeset
201 except Exception:
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
Goffi <goffi@goffi.org>
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diff changeset
202 return False
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
Goffi <goffi@goffi.org>
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diff changeset
203 return True
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
Goffi <goffi@goffi.org>
parents: 843
diff changeset
204
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
Goffi <goffi@goffi.org>
parents: 843
diff changeset
205 download_file_powershell.viable = has_powershell
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
Goffi <goffi@goffi.org>
parents: 843
diff changeset
206
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
Goffi <goffi@goffi.org>
parents: 843
diff changeset
207 def download_file_curl(url, target):
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
Goffi <goffi@goffi.org>
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diff changeset
208 cmd = ['curl', url, '--silent', '--output', target]
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
Goffi <goffi@goffi.org>
parents: 843
diff changeset
209 _clean_check(cmd, target)
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
Goffi <goffi@goffi.org>
parents: 843
diff changeset
210
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
Goffi <goffi@goffi.org>
parents: 843
diff changeset
211 def has_curl():
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
Goffi <goffi@goffi.org>
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diff changeset
212 cmd = ['curl', '--version']
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
Goffi <goffi@goffi.org>
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diff changeset
213 with open(os.path.devnull, 'wb') as devnull:
231
f68a9a429c88 added distribute bootstrap file
Goffi <goffi@goffi.org>
parents:
diff changeset
214 try:
1155
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
Goffi <goffi@goffi.org>
parents: 843
diff changeset
215 subprocess.check_call(cmd, stdout=devnull, stderr=devnull)
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
Goffi <goffi@goffi.org>
parents: 843
diff changeset
216 except Exception:
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
Goffi <goffi@goffi.org>
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diff changeset
217 return False
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
Goffi <goffi@goffi.org>
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diff changeset
218 return True
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
Goffi <goffi@goffi.org>
parents: 843
diff changeset
219
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
Goffi <goffi@goffi.org>
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diff changeset
220 download_file_curl.viable = has_curl
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
Goffi <goffi@goffi.org>
parents: 843
diff changeset
221
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
Goffi <goffi@goffi.org>
parents: 843
diff changeset
222 def download_file_wget(url, target):
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
Goffi <goffi@goffi.org>
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diff changeset
223 cmd = ['wget', url, '--quiet', '--output-document', target]
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
Goffi <goffi@goffi.org>
parents: 843
diff changeset
224 _clean_check(cmd, target)
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
Goffi <goffi@goffi.org>
parents: 843
diff changeset
225
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
Goffi <goffi@goffi.org>
parents: 843
diff changeset
226 def has_wget():
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
Goffi <goffi@goffi.org>
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diff changeset
227 cmd = ['wget', '--version']
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
Goffi <goffi@goffi.org>
parents: 843
diff changeset
228 with open(os.path.devnull, 'wb') as devnull:
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
Goffi <goffi@goffi.org>
parents: 843
diff changeset
229 try:
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
Goffi <goffi@goffi.org>
parents: 843
diff changeset
230 subprocess.check_call(cmd, stdout=devnull, stderr=devnull)
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
Goffi <goffi@goffi.org>
parents: 843
diff changeset
231 except Exception:
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
Goffi <goffi@goffi.org>
parents: 843
diff changeset
232 return False
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
Goffi <goffi@goffi.org>
parents: 843
diff changeset
233 return True
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
Goffi <goffi@goffi.org>
parents: 843
diff changeset
234
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
Goffi <goffi@goffi.org>
parents: 843
diff changeset
235 download_file_wget.viable = has_wget
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
Goffi <goffi@goffi.org>
parents: 843
diff changeset
236
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
Goffi <goffi@goffi.org>
parents: 843
diff changeset
237 def download_file_insecure(url, target):
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
Goffi <goffi@goffi.org>
parents: 843
diff changeset
238 """
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
Goffi <goffi@goffi.org>
parents: 843
diff changeset
239 Use Python to download the file, even though it cannot authenticate the
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
Goffi <goffi@goffi.org>
parents: 843
diff changeset
240 connection.
a1d47760df3f misc (install): updated old distribute_setup.py to new setuptools' ez_setup.py
Goffi <goffi@goffi.org>
parents: 843
diff changeset
241 """
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242 src = urlopen(url)
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243 try:
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244 # Read all the data in one block.
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245 data = src.read()
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246 finally:
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247 src.close()
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248
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249 # Write all the data in one block to avoid creating a partial file.
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250 with open(target, "wb") as dst:
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251 dst.write(data)
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252
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253 download_file_insecure.viable = lambda: True
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254
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255 def get_best_downloader():
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256 downloaders = (
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257 download_file_powershell,
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258 download_file_curl,
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259 download_file_wget,
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260 download_file_insecure,
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261 )
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262 viable_downloaders = (dl for dl in downloaders if dl.viable())
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263 return next(viable_downloaders, None)
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264
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265 def download_setuptools(version=DEFAULT_VERSION, download_base=DEFAULT_URL,
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266 to_dir=os.curdir, delay=15, downloader_factory=get_best_downloader):
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267 """
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268 Download setuptools from a specified location and return its filename
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269
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270 `version` should be a valid setuptools version number that is available
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271 as an sdist for download under the `download_base` URL (which should end
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272 with a '/'). `to_dir` is the directory where the egg will be downloaded.
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273 `delay` is the number of seconds to pause before an actual download
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274 attempt.
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275
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276 ``downloader_factory`` should be a function taking no arguments and
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277 returning a function for downloading a URL to a target.
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278 """
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279 # making sure we use the absolute path
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280 to_dir = os.path.abspath(to_dir)
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281 zip_name = "setuptools-%s.zip" % version
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282 url = download_base + zip_name
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283 saveto = os.path.join(to_dir, zip_name)
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284 if not os.path.exists(saveto): # Avoid repeated downloads
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285 log.warn("Downloading %s", url)
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286 downloader = downloader_factory()
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287 downloader(url, saveto)
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288 return os.path.realpath(saveto)
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289
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290 def _build_install_args(options):
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291 """
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292 Build the arguments to 'python setup.py install' on the setuptools package
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293 """
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294 return ['--user'] if options.user_install else []
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295
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296 def _parse_args():
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297 """
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298 Parse the command line for options
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299 """
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300 parser = optparse.OptionParser()
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301 parser.add_option(
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302 '--user', dest='user_install', action='store_true', default=False,
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303 help='install in user site package (requires Python 2.6 or later)')
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304 parser.add_option(
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305 '--download-base', dest='download_base', metavar="URL",
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306 default=DEFAULT_URL,
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307 help='alternative URL from where to download the setuptools package')
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308 parser.add_option(
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309 '--insecure', dest='downloader_factory', action='store_const',
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310 const=lambda: download_file_insecure, default=get_best_downloader,
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311 help='Use internal, non-validating downloader'
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312 )
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313 parser.add_option(
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314 '--version', help="Specify which version to download",
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315 default=DEFAULT_VERSION,
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316 )
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317 options, args = parser.parse_args()
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318 # positional arguments are ignored
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319 return options
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320
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321 def main():
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322 """Install or upgrade setuptools and EasyInstall"""
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323 options = _parse_args()
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324 archive = download_setuptools(
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325 version=options.version,
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326 download_base=options.download_base,
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327 downloader_factory=options.downloader_factory,
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328 )
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329 return _install(archive, _build_install_args(options))
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330
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331 if __name__ == '__main__':
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332 sys.exit(main())