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annotate paint/info.py @ 78:ab0620d3755b

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author Jeff Hammel <jhammel@mozilla.com>
date Mon, 28 Jan 2013 18:45:52 -0800
parents 00c0f668f332
children
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1 """
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2 interfaces to get information from a package
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3 """
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4
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5
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6 import imp
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7 import pkginfo
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8 import os
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9 import subprocess
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10 import sys
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11
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12 from distutils.dist import Distribution
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13 from subprocess import check_call as call
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14 from StringIO import StringIO
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15
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16 # TODO:
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17 # Reconcile the difference between the keys (and values) between the different
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18 # implementations. Pick a canon and stick with it.
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19
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20 # SetupOverridePackageInfo:
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21 # {'entry_points': '\n', 'description': 'a dummy package', 'license': '', 'author': 'Jeff Hammel', 'install_requires': [], 'include_package_data': True, 'classifiers': [], 'url': 'http://example.com/', 'author_email': 'jhammel@mozilla.com', 'version': '0.1', 'zip_safe': False, 'packages': ['dummy'], 'long_description': 'dummy\n===========\n\na dummy package\n\n----\n\nJeff Hammel\n\nhttp://example.com/\n\n', 'name': 'dummy'}
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22
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23 # EggInfo:
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24 # {'Name': 'dummy', 'License': 'UNKNOWN', 'Author': 'Jeff Hammel', 'Metadata-Version': '1.0', 'Home-page': 'http://example.com/', 'Summary': 'a dummy package', 'Platform': 'UNKNOWN', 'Version': '0.1', 'Author-email': 'jhammel@mozilla.com', 'Description': 'dummy'}
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26 # see http://www.python.org/dev/peps/pep-0314/ :
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27 # Metadata for Python Software Packages
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29
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30 # TODO: consider using pkginfo
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31
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32 def setup2metadata(**attrs):
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33 """
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34 convert setup arguments to standard python metadata:
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35 http://www.python.org/dev/peps/pep-0314/
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36 """
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37 distribution = Distribution(attrs)
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38 buffer = StringIO()
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39 distribution.metadata.write_pkg_file(buffer)
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40 pkginfo_dist = pkginfo.Distribution()
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41 pkinfo_dist.parse(buffer.getvalue())
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42 newattrs = dict((i, getattr(pkginfo_dist, i)) for i in pkginfo_dist)
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43 header_dict = dict((attr_name, header_name)
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44 for header_name, attr_name, multiple in pkginfo_dist._getHeaderAttrs())
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45 info = dict((header_dict[key], value) for key, value in newattrs.items())
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46
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47 # XXX pkginfo says 'Home-Page' though the spec says Home-page
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48 info.setdefault('Home-page', info['Home-Page'])
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49
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50 return info
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52
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53 class PackageInfo(object):
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54 """abstract base class of package info"""
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55 def __init__(self, path):
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56 """
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57 - path : path to setup.py or its directory
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58 """
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59 if os.path.isdir(path):
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60 path = os.path.join(path, 'setup.py')
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61 assert os.path.exists(path), "'%s' not found" % path
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62 self.setup_py = os.path.abspath(path)
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63
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64 def __call__(self):
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65 """returns dictionary of package info"""
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66 raise NotImplementedError("abstract base class")
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67 def dependencies(self):
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68 raise NotImplementedError("abstract base class")
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70 class SetupOverridePackageInfo(PackageInfo):
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71 """
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72 gather setup.py information by overriding the function
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73 """
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74 # TODO: override distutils.core.setup as well
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75 # http://docs.python.org/2/distutils/index.html#distutils-index
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77 def __call__(self):
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78 setuptools = sys.modules.get('setuptools')
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79 sys.modules['setuptools'] = sys.modules[__name__]
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80 globals()['setup'] = self._setup
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81 try:
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82 module = imp.load_source('setup', self.setup_py)
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83 finally:
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84 sys.modules.pop('setuptools')
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85 if setuptools:
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86 sys.modules['setuptools'] = setuptools
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87 globals().pop('setup')
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88 return self.__dict__.pop('_info')
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89
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90 def _setup(self, **kwargs):
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91 self._info = kwargs
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92
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93
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94 class EggInfo(PackageInfo):
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95 """
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96 use `python setup.py egg_info` to gather package information
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97 """
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98
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99 def __call__(self):
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100
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101 info = self.read_pkg_info(self._pkg_info())
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102 # TODO: install_requires
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103 return info
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104
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105 @classmethod
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106 def read_pkg_info(cls, path):
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107 """reads PKG-INFO and returns a dict"""
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108
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109 # read the package information
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110 info_dict = {}
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111 for line in file(path).readlines():
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112 if not line or line[0].isspace():
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113 continue # XXX neglects description
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114 assert ':' in line
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115 key, value = [i.strip() for i in line.split(':', 1)]
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116 info_dict[key] = value
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117
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118 # return the information
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119 return info_dict
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120
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121 def dependencies(self):
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122 """return the dependencies of the package"""
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123
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124 # TODO: should probably have a more detailed dict:
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125 # {'mozinfo': {'version': '>= 0.2',
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126 # 'url': 'http://something.com/'}}
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127
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128 # get the egg_info directory
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129 egg_info = self._egg_info()
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130
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131 # read the dependencies
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132 requires = os.path.join(egg_info, 'requires.txt')
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133 if os.path.exists(requires):
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134 dependencies = [i.strip() for i in file(requires).readlines() if i.strip()]
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135 else:
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136 dependencies = []
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137 dependencies = dict([(i, None) for i in dependencies])
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138
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139 # read the dependency links
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140 dependency_links = os.path.join(egg_info, 'dependency_links.txt')
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141 if os.path.exists(dependency_links):
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142 links = [i.strip() for i in file(dependency_links).readlines() if i.strip()]
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143 for link in links:
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144 # XXX pretty ghetto
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145 assert '#egg=' in link
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146 url, dep = link.split('#egg=', 1)
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147 if dep in dependencies:
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148 dependencies[dep] = link
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149
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150 return dependencies
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151
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152
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153 def _egg_info(self):
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154 """build the egg_info directory"""
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155
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156 # cached result
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157 if getattr(self, '_egg_info_path', None):
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158 return self._egg_info_path
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159
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160 directory = os.path.dirname(self.setup_py)
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161
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162 # setup the egg info
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163 try:
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164 call([sys.executable, 'setup.py', 'egg_info'], cwd=directory, stdout=subprocess.PIPE)
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165 except Exception:
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166 print "Failure to generate egg_info: %s" % self.setup_py
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167 raise
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168
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169 # get the .egg-info directory
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170 egg_info = [i for i in os.listdir(directory)
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171 if i.endswith('.egg-info')]
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172 assert len(egg_info) == 1, 'Expected one .egg-info directory in %s, got: %s' % (directory, egg_info)
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173 egg_info = os.path.join(directory, egg_info[0])
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174 assert os.path.isdir(egg_info), "%s is not a directory" % egg_info
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175
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176 # cache it
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177 self._egg_info_path = egg_info
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178 return self._egg_info_path
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179
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180 def _pkg_info(self):
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181 """returns path to PKG-INFO file"""
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182
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183 if getattr(self, '_pkg_info_path', None):
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184 # return cached value
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185 return self._pkg_info_path
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186
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187 try:
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188 egg_info = self._egg_info()
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189 except Exception, exception:
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190 # try to get the package info from a file
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191 path = os.path.dirname(self.setup_py)
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192 pkg_info = os.path.join(path, 'PKG-INFO')
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193 if os.path.exists(pkg_info):
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194 self._pkg_info_path = pkg_info
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195 return self._pkg_info_path
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196 raise Exception("Cannot find or generate PKG-INFO")
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197
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198 pkg_info = os.path.join(egg_info, 'PKG-INFO')
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199 assert os.path.exists(pkg_info)
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200 self._pkg_info_path = pkg_info
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201 return self._pkg_info_path
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202