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annotate paint/info.py @ 71:da69d58f960d

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stub method of conversion, PackageSet, and some cleanup
author Jeff Hammel <jhammel@mozilla.com>
date Sun, 27 Jan 2013 17:57:38 -0800
parents fea269259222
children 5b10f2c03cb9
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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 import imp
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6 import os
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7 import subprocess
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8 import sys
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9
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10 from distutils.dist import DistributionMetadata
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11 from subprocess import check_call as call
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12
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13 # TODO:
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14 # Reconcile the difference between the keys (and values) between the different
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15 # implementations. Pick a canon and stick with it.
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16
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17 # SetupOverridePackageInfo:
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18 # {'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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19
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20 # EggInfo:
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21 # {'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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23 # see http://www.python.org/dev/peps/pep-0314/ :
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24 # Metadata for Python Software Packages
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26
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27 # TODO: consider using pkginfo
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29 def setup2metadata(**kwargs):
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30 """
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31 convert setup arguments to standard python metadata:
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32 http://www.python.org/dev/peps/pep-0314/
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33 """
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34 metadata = DistributionMetadata()
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35 raise NotImplementedError("TODO")
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36
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37
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38 class PackageInfo(object):
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39 """abstract base class of package info"""
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40 def __init__(self, path):
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41 """
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42 - path : path to setup.py or its directory
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43 """
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44 if os.path.isdir(path):
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45 path = os.path.join(path, 'setup.py')
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46 assert os.path.exists(path), "'%s' not found" % path
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47 self.setup_py = os.path.abspath(path)
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48
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49 def __call__(self):
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50 """returns dictionary of package info"""
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51 raise NotImplementedError("abstract base class")
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52
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53 def dependencies(self):
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54 raise NotImplementedError("abstract base class")
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55
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56 class SetupOverridePackageInfo(PackageInfo):
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57 """
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58 gather setup.py information by overriding the function
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59 """
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60 # TODO: override distutils.core.setup as well
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61 # http://docs.python.org/2/distutils/index.html#distutils-index
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63 def __call__(self):
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64 setuptools = sys.modules.get('setuptools')
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65 sys.modules['setuptools'] = sys.modules[__name__]
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66 globals()['setup'] = self._setup
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67 try:
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68 module = imp.load_source('setup', self.setup_py)
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69 finally:
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70 sys.modules.pop('setuptools')
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71 if setuptools:
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72 sys.modules['setuptools'] = setuptools
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73 globals().pop('setup')
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74 return self.__dict__.pop('_info')
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75
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76 def _setup(self, **kwargs):
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77 self._info = kwargs
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80 class EggInfo(PackageInfo):
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81 """
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82 use `python setup.py egg_info` to gather package information
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83 """
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84
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85 def __call__(self):
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86
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87 info = self.read_pkg_info(self._pkg_info())
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88 # TODO: install_requires
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89 return info
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90
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91 @classmethod
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92 def read_pkg_info(cls, path):
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93 """reads PKG-INFO and returns a dict"""
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94
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95 # read the package information
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96 info_dict = {}
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97 for line in file(path).readlines():
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98 if not line or line[0].isspace():
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99 continue # XXX neglects description
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100 assert ':' in line
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101 key, value = [i.strip() for i in line.split(':', 1)]
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102 info_dict[key] = value
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103
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104 # return the information
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105 return info_dict
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106
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107 def dependencies(self):
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108 """return the dependencies of the package"""
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109
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110 # TODO: should probably have a more detailed dict:
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111 # {'mozinfo': {'version': '>= 0.2',
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112 # 'url': 'http://something.com/'}}
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113
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114 # get the egg_info directory
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115 egg_info = self._egg_info()
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116
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117 # read the dependencies
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118 requires = os.path.join(egg_info, 'requires.txt')
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119 if os.path.exists(requires):
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120 dependencies = [i.strip() for i in file(requires).readlines() if i.strip()]
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121 else:
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122 dependencies = []
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123 dependencies = dict([(i, None) for i in dependencies])
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124
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125 # read the dependency links
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126 dependency_links = os.path.join(egg_info, 'dependency_links.txt')
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127 if os.path.exists(dependency_links):
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128 links = [i.strip() for i in file(dependency_links).readlines() if i.strip()]
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129 for link in links:
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130 # XXX pretty ghetto
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131 assert '#egg=' in link
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132 url, dep = link.split('#egg=', 1)
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133 if dep in dependencies:
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134 dependencies[dep] = link
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135
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136 return dependencies
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137
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138
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139 def _egg_info(self):
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140 """build the egg_info directory"""
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141
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142 # cached result
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143 if getattr(self, '_egg_info_path', None):
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144 return self._egg_info_path
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145
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146 directory = os.path.dirname(self.setup_py)
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147
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148 # setup the egg info
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149 try:
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150 call([sys.executable, 'setup.py', 'egg_info'], cwd=directory, stdout=subprocess.PIPE)
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151 except Exception:
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152 print "Failure to generate egg_info: %s" % self.setup_py
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153 raise
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154
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155 # get the .egg-info directory
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156 egg_info = [i for i in os.listdir(directory)
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157 if i.endswith('.egg-info')]
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158 assert len(egg_info) == 1, 'Expected one .egg-info directory in %s, got: %s' % (directory, egg_info)
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159 egg_info = os.path.join(directory, egg_info[0])
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160 assert os.path.isdir(egg_info), "%s is not a directory" % egg_info
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161
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162 # cache it
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163 self._egg_info_path = egg_info
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164 return self._egg_info_path
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165
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166 def _pkg_info(self):
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167 """returns path to PKG-INFO file"""
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168
59
acee5e882768 the egg-info tests fail. yay!
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169 if getattr(self, '_pkg_info_path', None):
58
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170 # return cached value
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171 return self._pkg_info_path
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172
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173 try:
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174 egg_info = self._egg_info()
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175 except Exception, exception:
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176 # try to get the package info from a file
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177 path = os.path.dirname(self.setup_py)
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178 pkg_info = os.path.join(path, 'PKG-INFO')
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179 if os.path.exists(pkg_info):
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180 self._pkg_info_path = pkg_info
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181 return self._pkg_info_path
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182 raise Exception("Cannot find or generate PKG-INFO")
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183
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184 pkg_info = os.path.join(egg_info, 'PKG-INFO')
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185 assert os.path.exists(pkg_info)
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186 self._pkg_info_path = pkg_info
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187 return self._pkg_info_path
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188