Mercurial > repos > bcclaywell > argo_navis

annotate venv/lib/python2.7/site-packages/pip/wheel.py @ 0:d67268158946 draft

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planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
author bcclaywell
date Mon, 12 Oct 2015 17:43:33 -0400
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Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 """
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2 Support for installing and building the "wheel" binary package format.
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3 """
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4 from __future__ import absolute_import
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5
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6 import compileall
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7 import csv
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8 import functools
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9 import hashlib
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10 import logging
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11 import os
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12 import re
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13 import shutil
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14 import stat
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15 import sys
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16 import warnings
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17
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18 from base64 import urlsafe_b64encode
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19 from email.parser import Parser
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20
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21 from pip._vendor.six import StringIO
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22
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23 from pip.exceptions import InvalidWheelFilename, UnsupportedWheel
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24 from pip.locations import distutils_scheme
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25 from pip import pep425tags
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26 from pip.utils import (call_subprocess, normalize_path, make_path_relative,
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27 captured_stdout)
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28 from pip.utils.logging import indent_log
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29 from pip._vendor.distlib.scripts import ScriptMaker
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30 from pip._vendor import pkg_resources
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31 from pip._vendor.six.moves import configparser
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32
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33
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34 wheel_ext = '.whl'
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35
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36 VERSION_COMPATIBLE = (1, 0)
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38
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39 logger = logging.getLogger(__name__)
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41
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42 def rehash(path, algo='sha256', blocksize=1 << 20):
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43 """Return (hash, length) for path using hashlib.new(algo)"""
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44 h = hashlib.new(algo)
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45 length = 0
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46 with open(path, 'rb') as f:
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47 block = f.read(blocksize)
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48 while block:
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49 length += len(block)
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50 h.update(block)
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51 block = f.read(blocksize)
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52 digest = 'sha256=' + urlsafe_b64encode(
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53 h.digest()
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54 ).decode('latin1').rstrip('=')
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55 return (digest, length)
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56
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57
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58 def open_for_csv(name, mode):
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59 if sys.version_info[0] < 3:
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60 nl = {}
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61 bin = 'b'
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62 else:
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63 nl = {'newline': ''}
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64 bin = ''
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65 return open(name, mode + bin, **nl)
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66
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67
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68 def fix_script(path):
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69 """Replace #!python with #!/path/to/python
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70 Return True if file was changed."""
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71 # XXX RECORD hashes will need to be updated
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72 if os.path.isfile(path):
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73 with open(path, 'rb') as script:
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74 firstline = script.readline()
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75 if not firstline.startswith(b'#!python'):
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76 return False
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77 exename = sys.executable.encode(sys.getfilesystemencoding())
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78 firstline = b'#!' + exename + os.linesep.encode("ascii")
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79 rest = script.read()
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80 with open(path, 'wb') as script:
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81 script.write(firstline)
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82 script.write(rest)
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83 return True
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84
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85 dist_info_re = re.compile(r"""^(?P<namever>(?P<name>.+?)(-(?P<ver>\d.+?))?)
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86 \.dist-info$""", re.VERBOSE)
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87
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88
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89 def root_is_purelib(name, wheeldir):
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90 """
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91 Return True if the extracted wheel in wheeldir should go into purelib.
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92 """
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93 name_folded = name.replace("-", "_")
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94 for item in os.listdir(wheeldir):
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95 match = dist_info_re.match(item)
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96 if match and match.group('name') == name_folded:
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97 with open(os.path.join(wheeldir, item, 'WHEEL')) as wheel:
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98 for line in wheel:
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99 line = line.lower().rstrip()
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100 if line == "root-is-purelib: true":
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101 return True
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102 return False
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103
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104
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105 def get_entrypoints(filename):
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106 if not os.path.exists(filename):
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107 return {}, {}
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108
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109 # This is done because you can pass a string to entry_points wrappers which
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110 # means that they may or may not be valid INI files. The attempt here is to
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111 # strip leading and trailing whitespace in order to make them valid INI
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112 # files.
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113 with open(filename) as fp:
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114 data = StringIO()
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115 for line in fp:
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116 data.write(line.strip())
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117 data.write("\n")
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118 data.seek(0)
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119
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120 cp = configparser.RawConfigParser()
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121 cp.readfp(data)
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122
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123 console = {}
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124 gui = {}
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125 if cp.has_section('console_scripts'):
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126 console = dict(cp.items('console_scripts'))
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127 if cp.has_section('gui_scripts'):
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128 gui = dict(cp.items('gui_scripts'))
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129 return console, gui
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130
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131
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132 def move_wheel_files(name, req, wheeldir, user=False, home=None, root=None,
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133 pycompile=True, scheme=None, isolated=False):
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134 """Install a wheel"""
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135
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136 if not scheme:
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137 scheme = distutils_scheme(
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138 name, user=user, home=home, root=root, isolated=isolated
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139 )
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140
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141 if root_is_purelib(name, wheeldir):
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142 lib_dir = scheme['purelib']
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143 else:
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144 lib_dir = scheme['platlib']
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145
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146 info_dir = []
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147 data_dirs = []
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148 source = wheeldir.rstrip(os.path.sep) + os.path.sep
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149
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150 # Record details of the files moved
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151 # installed = files copied from the wheel to the destination
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152 # changed = files changed while installing (scripts #! line typically)
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153 # generated = files newly generated during the install (script wrappers)
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154 installed = {}
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155 changed = set()
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156 generated = []
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157
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158 # Compile all of the pyc files that we're going to be installing
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159 if pycompile:
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160 with captured_stdout() as stdout:
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161 with warnings.catch_warnings():
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162 warnings.filterwarnings('ignore')
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163 compileall.compile_dir(source, force=True, quiet=True)
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164 logger.debug(stdout.getvalue())
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165
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166 def normpath(src, p):
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167 return make_path_relative(src, p).replace(os.path.sep, '/')
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168
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169 def record_installed(srcfile, destfile, modified=False):
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170 """Map archive RECORD paths to installation RECORD paths."""
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171 oldpath = normpath(srcfile, wheeldir)
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172 newpath = normpath(destfile, lib_dir)
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173 installed[oldpath] = newpath
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174 if modified:
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175 changed.add(destfile)
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176
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177 def clobber(source, dest, is_base, fixer=None, filter=None):
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178 if not os.path.exists(dest): # common for the 'include' path
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179 os.makedirs(dest)
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180
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181 for dir, subdirs, files in os.walk(source):
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182 basedir = dir[len(source):].lstrip(os.path.sep)
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183 destdir = os.path.join(dest, basedir)
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184 if is_base and basedir.split(os.path.sep, 1)[0].endswith('.data'):
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185 continue
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186 for s in subdirs:
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187 destsubdir = os.path.join(dest, basedir, s)
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188 if is_base and basedir == '' and destsubdir.endswith('.data'):
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189 data_dirs.append(s)
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190 continue
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191 elif (is_base and
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192 s.endswith('.dist-info') and
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193 # is self.req.project_name case preserving?
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194 s.lower().startswith(
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195 req.project_name.replace('-', '_').lower())):
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196 assert not info_dir, 'Multiple .dist-info directories'
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197 info_dir.append(destsubdir)
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198 for f in files:
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199 # Skip unwanted files
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200 if filter and filter(f):
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201 continue
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202 srcfile = os.path.join(dir, f)
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203 destfile = os.path.join(dest, basedir, f)
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204 # directory creation is lazy and after the file filtering above
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205 # to ensure we don't install empty dirs; empty dirs can't be
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206 # uninstalled.
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207 if not os.path.exists(destdir):
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208 os.makedirs(destdir)
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209
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210 # We use copyfile (not move, copy, or copy2) to be extra sure
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211 # that we are not moving directories over (copyfile fails for
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212 # directories) as well as to ensure that we are not copying
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213 # over any metadata because we want more control over what
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214 # metadata we actually copy over.
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215 shutil.copyfile(srcfile, destfile)
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216
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217 # Copy over the metadata for the file, currently this only
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218 # includes the atime and mtime.
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219 st = os.stat(srcfile)
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220 if hasattr(os, "utime"):
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221 os.utime(destfile, (st.st_atime, st.st_mtime))
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222
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223 # If our file is executable, then make our destination file
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224 # executable.
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225 if os.access(srcfile, os.X_OK):
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226 st = os.stat(srcfile)
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227 permissions = (
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228 st.st_mode | stat.S_IXUSR | stat.S_IXGRP | stat.S_IXOTH
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229 )
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230 os.chmod(destfile, permissions)
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231
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232 changed = False
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233 if fixer:
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234 changed = fixer(destfile)
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235 record_installed(srcfile, destfile, changed)
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236
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237 clobber(source, lib_dir, True)
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238
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239 assert info_dir, "%s .dist-info directory not found" % req
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240
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241 # Get the defined entry points
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242 ep_file = os.path.join(info_dir[0], 'entry_points.txt')
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243 console, gui = get_entrypoints(ep_file)
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244
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245 def is_entrypoint_wrapper(name):
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246 # EP, EP.exe and EP-script.py are scripts generated for
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247 # entry point EP by setuptools
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248 if name.lower().endswith('.exe'):
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249 matchname = name[:-4]
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250 elif name.lower().endswith('-script.py'):
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251 matchname = name[:-10]
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252 elif name.lower().endswith(".pya"):
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253 matchname = name[:-4]
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254 else:
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255 matchname = name
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256 # Ignore setuptools-generated scripts
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257 return (matchname in console or matchname in gui)
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258
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259 for datadir in data_dirs:
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260 fixer = None
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261 filter = None
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262 for subdir in os.listdir(os.path.join(wheeldir, datadir)):
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263 fixer = None
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264 if subdir == 'scripts':
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265 fixer = fix_script
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266 filter = is_entrypoint_wrapper
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267 source = os.path.join(wheeldir, datadir, subdir)
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268 dest = scheme[subdir]
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269 clobber(source, dest, False, fixer=fixer, filter=filter)
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270
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271 maker = ScriptMaker(None, scheme['scripts'])
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272
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273 # Ensure old scripts are overwritten.
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274 # See https://github.com/pypa/pip/issues/1800
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275 maker.clobber = True
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276
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277 # Ensure we don't generate any variants for scripts because this is almost
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278 # never what somebody wants.
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279 # See https://bitbucket.org/pypa/distlib/issue/35/
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280 maker.variants = set(('', ))
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281
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282 # This is required because otherwise distlib creates scripts that are not
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283 # executable.
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284 # See https://bitbucket.org/pypa/distlib/issue/32/
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285 maker.set_mode = True
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286
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287 # Simplify the script and fix the fact that the default script swallows
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288 # every single stack trace.
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289 # See https://bitbucket.org/pypa/distlib/issue/34/
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290 # See https://bitbucket.org/pypa/distlib/issue/33/
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291 def _get_script_text(entry):
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292 return maker.script_template % {
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293 "module": entry.prefix,
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294 "import_name": entry.suffix.split(".")[0],
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295 "func": entry.suffix,
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296 }
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297
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298 maker._get_script_text = _get_script_text
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299 maker.script_template = """# -*- coding: utf-8 -*-
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300 import re
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301 import sys
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302
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303 from %(module)s import %(import_name)s
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304
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305 if __name__ == '__main__':
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306 sys.argv[0] = re.sub(r'(-script\.pyw|\.exe)?$', '', sys.argv[0])
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307 sys.exit(%(func)s())
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308 """
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309
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310 # Special case pip and setuptools to generate versioned wrappers
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311 #
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312 # The issue is that some projects (specifically, pip and setuptools) use
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313 # code in setup.py to create "versioned" entry points - pip2.7 on Python
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314 # 2.7, pip3.3 on Python 3.3, etc. But these entry points are baked into
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315 # the wheel metadata at build time, and so if the wheel is installed with
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316 # a *different* version of Python the entry points will be wrong. The
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317 # correct fix for this is to enhance the metadata to be able to describe
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318 # such versioned entry points, but that won't happen till Metadata 2.0 is
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319 # available.
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320 # In the meantime, projects using versioned entry points will either have
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321 # incorrect versioned entry points, or they will not be able to distribute
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322 # "universal" wheels (i.e., they will need a wheel per Python version).
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323 #
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324 # Because setuptools and pip are bundled with _ensurepip and virtualenv,
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325 # we need to use universal wheels. So, as a stopgap until Metadata 2.0, we
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326 # override the versioned entry points in the wheel and generate the
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327 # correct ones. This code is purely a short-term measure until Metadat 2.0
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328 # is available.
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329 #
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330 # To add the level of hack in this section of code, in order to support
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331 # ensurepip this code will look for an ``ENSUREPIP_OPTIONS`` environment
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332 # variable which will control which version scripts get installed.
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333 #
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334 # ENSUREPIP_OPTIONS=altinstall
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335 # - Only pipX.Y and easy_install-X.Y will be generated and installed
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336 # ENSUREPIP_OPTIONS=install
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337 # - pipX.Y, pipX, easy_install-X.Y will be generated and installed. Note
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338 # that this option is technically if ENSUREPIP_OPTIONS is set and is
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339 # not altinstall
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340 # DEFAULT
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341 # - The default behavior is to install pip, pipX, pipX.Y, easy_install
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342 # and easy_install-X.Y.
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343 pip_script = console.pop('pip', None)
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344 if pip_script:
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345 if "ENSUREPIP_OPTIONS" not in os.environ:
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346 spec = 'pip = ' + pip_script
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347 generated.extend(maker.make(spec))
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348
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349 if os.environ.get("ENSUREPIP_OPTIONS", "") != "altinstall":
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350 spec = 'pip%s = %s' % (sys.version[:1], pip_script)
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351 generated.extend(maker.make(spec))
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352
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353 spec = 'pip%s = %s' % (sys.version[:3], pip_script)
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354 generated.extend(maker.make(spec))
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355 # Delete any other versioned pip entry points
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356 pip_ep = [k for k in console if re.match(r'pip(\d(\.\d)?)?$', k)]
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357 for k in pip_ep:
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358 del console[k]
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359 easy_install_script = console.pop('easy_install', None)
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360 if easy_install_script:
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361 if "ENSUREPIP_OPTIONS" not in os.environ:
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362 spec = 'easy_install = ' + easy_install_script
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363 generated.extend(maker.make(spec))
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364
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365 spec = 'easy_install-%s = %s' % (sys.version[:3], easy_install_script)
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366 generated.extend(maker.make(spec))
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367 # Delete any other versioned easy_install entry points
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368 easy_install_ep = [
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369 k for k in console if re.match(r'easy_install(-\d\.\d)?$', k)
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370 ]
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371 for k in easy_install_ep:
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372 del console[k]
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373
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374 # Generate the console and GUI entry points specified in the wheel
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375 if len(console) > 0:
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376 generated.extend(
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377 maker.make_multiple(['%s = %s' % kv for kv in console.items()])
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378 )
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379 if len(gui) > 0:
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380 generated.extend(
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381 maker.make_multiple(
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382 ['%s = %s' % kv for kv in gui.items()],
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383 {'gui': True}
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384 )
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385 )
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386
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387 record = os.path.join(info_dir[0], 'RECORD')
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388 temp_record = os.path.join(info_dir[0], 'RECORD.pip')
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389 with open_for_csv(record, 'r') as record_in:
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390 with open_for_csv(temp_record, 'w+') as record_out:
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391 reader = csv.reader(record_in)
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392 writer = csv.writer(record_out)
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393 for row in reader:
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394 row[0] = installed.pop(row[0], row[0])
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395 if row[0] in changed:
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396 row[1], row[2] = rehash(row[0])
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397 writer.writerow(row)
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398 for f in generated:
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399 h, l = rehash(f)
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400 writer.writerow((f, h, l))
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401 for f in installed:
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402 writer.writerow((installed[f], '', ''))
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403 shutil.move(temp_record, record)
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404
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405
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406 def _unique(fn):
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407 @functools.wraps(fn)
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408 def unique(*args, **kw):
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409 seen = set()
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410 for item in fn(*args, **kw):
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411 if item not in seen:
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412 seen.add(item)
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413 yield item
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414 return unique
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415
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416
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417 # TODO: this goes somewhere besides the wheel module
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418 @_unique
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419 def uninstallation_paths(dist):
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420 """
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421 Yield all the uninstallation paths for dist based on RECORD-without-.pyc
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422
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423 Yield paths to all the files in RECORD. For each .py file in RECORD, add
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424 the .pyc in the same directory.
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425
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426 UninstallPathSet.add() takes care of the __pycache__ .pyc.
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427 """
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428 from pip.utils import FakeFile # circular import
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429 r = csv.reader(FakeFile(dist.get_metadata_lines('RECORD')))
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430 for row in r:
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431 path = os.path.join(dist.location, row[0])
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432 yield path
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433 if path.endswith('.py'):
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434 dn, fn = os.path.split(path)
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435 base = fn[:-3]
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436 path = os.path.join(dn, base + '.pyc')
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437 yield path
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438
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439
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440 def wheel_version(source_dir):
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441 """
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442 Return the Wheel-Version of an extracted wheel, if possible.
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443
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444 Otherwise, return False if we couldn't parse / extract it.
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445 """
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446 try:
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447 dist = [d for d in pkg_resources.find_on_path(None, source_dir)][0]
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448
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449 wheel_data = dist.get_metadata('WHEEL')
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450 wheel_data = Parser().parsestr(wheel_data)
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451
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452 version = wheel_data['Wheel-Version'].strip()
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453 version = tuple(map(int, version.split('.')))
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454 return version
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455 except:
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456 return False
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457
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458
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459 def check_compatibility(version, name):
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460 """
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461 Raises errors or warns if called with an incompatible Wheel-Version.
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462
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463 Pip should refuse to install a Wheel-Version that's a major series
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464 ahead of what it's compatible with (e.g 2.0 > 1.1); and warn when
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465 installing a version only minor version ahead (e.g 1.2 > 1.1).
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466
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467 version: a 2-tuple representing a Wheel-Version (Major, Minor)
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468 name: name of wheel or package to raise exception about
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469
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470 :raises UnsupportedWheel: when an incompatible Wheel-Version is given
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471 """
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472 if not version:
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473 raise UnsupportedWheel(
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474 "%s is in an unsupported or invalid wheel" % name
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475 )
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476 if version[0] > VERSION_COMPATIBLE[0]:
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477 raise UnsupportedWheel(
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478 "%s's Wheel-Version (%s) is not compatible with this version "
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479 "of pip" % (name, '.'.join(map(str, version)))
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480 )
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481 elif version > VERSION_COMPATIBLE:
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482 logger.warning(
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483 'Installing from a newer Wheel-Version (%s)',
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484 '.'.join(map(str, version)),
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485 )
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486
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487
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488 class Wheel(object):
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489 """A wheel file"""
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490
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491 # TODO: maybe move the install code into this class
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492
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493 wheel_file_re = re.compile(
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494 r"""^(?P<namever>(?P<name>.+?)-(?P<ver>\d.*?))
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495 ((-(?P<build>\d.*?))?-(?P<pyver>.+?)-(?P<abi>.+?)-(?P<plat>.+?)
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496 \.whl|\.dist-info)$""",
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497 re.VERBOSE
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498 )
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499
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500 def __init__(self, filename):
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501 """
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502 :raises InvalidWheelFilename: when the filename is invalid for a wheel
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503 """
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504 wheel_info = self.wheel_file_re.match(filename)
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505 if not wheel_info:
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506 raise InvalidWheelFilename(
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507 "%s is not a valid wheel filename." % filename
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508 )
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509 self.filename = filename
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510 self.name = wheel_info.group('name').replace('_', '-')
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511 # we'll assume "_" means "-" due to wheel naming scheme
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512 # (https://github.com/pypa/pip/issues/1150)
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513 self.version = wheel_info.group('ver').replace('_', '-')
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514 self.pyversions = wheel_info.group('pyver').split('.')
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515 self.abis = wheel_info.group('abi').split('.')
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516 self.plats = wheel_info.group('plat').split('.')
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517
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518 # All the tag combinations from this file
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519 self.file_tags = set(
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520 (x, y, z) for x in self.pyversions
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521 for y in self.abis for z in self.plats
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522 )
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523
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524 def support_index_min(self, tags=None):
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525 """
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526 Return the lowest index that one of the wheel's file_tag combinations
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527 achieves in the supported_tags list e.g. if there are 8 supported tags,
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528 and one of the file tags is first in the list, then return 0. Returns
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529 None is the wheel is not supported.
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530 """
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531 if tags is None: # for mock
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532 tags = pep425tags.supported_tags
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533 indexes = [tags.index(c) for c in self.file_tags if c in tags]
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534 return min(indexes) if indexes else None
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535
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536 def supported(self, tags=None):
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537 """Is this wheel supported on this system?"""
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538 if tags is None: # for mock
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539 tags = pep425tags.supported_tags
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540 return bool(set(tags).intersection(self.file_tags))
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541
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542
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543 class WheelBuilder(object):
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544 """Build wheels from a RequirementSet."""
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545
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546 def __init__(self, requirement_set, finder, wheel_dir, build_options=None,
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547 global_options=None):
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548 self.requirement_set = requirement_set
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549 self.finder = finder
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550 self.wheel_dir = normalize_path(wheel_dir)
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551 self.build_options = build_options or []
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552 self.global_options = global_options or []
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553
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554 def _build_one(self, req):
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555 """Build one wheel."""
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556
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557 base_args = [
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558 sys.executable, '-c',
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559 "import setuptools;__file__=%r;"
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560 "exec(compile(open(__file__).read().replace('\\r\\n', '\\n'), "
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561 "__file__, 'exec'))" % req.setup_py
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562 ] + list(self.global_options)
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563
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564 logger.info('Running setup.py bdist_wheel for %s', req.name)
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565 logger.info('Destination directory: %s', self.wheel_dir)
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566 wheel_args = base_args + ['bdist_wheel', '-d', self.wheel_dir] \
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567 + self.build_options
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568 try:
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569 call_subprocess(wheel_args, cwd=req.source_dir, show_stdout=False)
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570 return True
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571 except:
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572 logger.error('Failed building wheel for %s', req.name)
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573 return False
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574
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575 def build(self):
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576 """Build wheels."""
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577
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578 # unpack and constructs req set
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579 self.requirement_set.prepare_files(self.finder)
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580
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581 reqset = self.requirement_set.requirements.values()
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582
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583 buildset = []
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584 for req in reqset:
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585 if req.is_wheel:
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586 logger.info(
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587 'Skipping %s, due to already being wheel.', req.name,
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588 )
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589 elif req.editable:
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590 logger.info(
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591 'Skipping %s, due to being editable', req.name,
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592 )
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593 else:
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594 buildset.append(req)
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595
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596 if not buildset:
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597 return True
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598
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599 # Build the wheels.
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600 logger.info(
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601 'Building wheels for collected packages: %s',
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602 ', '.join([req.name for req in buildset]),
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603 )
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604 with indent_log():
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605 build_success, build_failure = [], []
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606 for req in buildset:
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607 if self._build_one(req):
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608 build_success.append(req)
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609 else:
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610 build_failure.append(req)
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611
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612 # notify success/failure
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613 if build_success:
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614 logger.info(
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615 'Successfully built %s',
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616 ' '.join([req.name for req in build_success]),
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617 )
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618 if build_failure:
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619 logger.info(
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620 'Failed to build %s',
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621 ' '.join([req.name for req in build_failure]),
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622 )
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623 # Return True if all builds were successful
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624 return len(build_failure) == 0