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annotate paint/info.py @ 67:8f39ba642531

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random stubbing
author Jeff Hammel <jhammel@mozilla.com>
date Fri, 25 Jan 2013 15:56:26 -0800
parents 1234bfb1f1f0
children d001017d5870
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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 subprocess import check_call as call
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11
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12 # TODO:
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13 # Reconcile the difference between the keys (and values) between the different
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14 # implementations. Pick a canon and stick with it.
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15
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16 # SetupOverridePackageInfo:
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17 # {'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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18
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19 # EggInfo:
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20 # {'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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21
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22 # see http://www.python.org/dev/peps/pep-0314/ :
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23 # Metadata for Python Software Packages
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25 class PackageInfo(object):
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26 """abstract base class of package info"""
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27 def __init__(self, path):
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28 """
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29 - path : path to setup.py or its directory
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30 """
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31 if os.path.isdir(path):
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32 path = os.path.join(path, 'setup.py')
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33 assert os.path.exists(path), "'%s' not found" % path
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34 self.setup_py = os.path.abspath(path)
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36 def __call__(self):
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37 """returns dictionary of package info"""
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38 raise NotImplementedError("abstract base class")
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41 class SetupOverridePackageInfo(PackageInfo):
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42 """
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43 gather setup.py information by overriding the function
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44 """
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45 # TODO: override distutils.core.setup as well
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46 # http://docs.python.org/2/distutils/index.html#distutils-index
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47
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48 def __call__(self):
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49 setuptools = sys.modules.get('setuptools')
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50 sys.modules['setuptools'] = sys.modules[__name__]
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51 globals()['setup'] = self._setup
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52 try:
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53 module = imp.load_source('setup', self.setup_py)
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54 finally:
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55 sys.modules.pop('setuptools')
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56 if setuptools:
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57 sys.modules['setuptools'] = setuptools
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58 globals().pop('setup')
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59 return self.__dict__.pop('_info')
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61 def _setup(self, **kwargs):
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62 self._info = kwargs
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64
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65 class EggInfo(PackageInfo):
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66 """
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67 use `python setup.py egg_info` to gather package information
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68 """
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69
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70 def __call__(self):
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71
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72 info = self.read_pkg_info(self._pkg_info())
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73 # TODO: install_requires
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74 return info
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75
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76 @classmethod
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77 def read_pkg_info(cls, path):
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78 """reads PKG-INFO and returns a dict"""
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79
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80 # read the package information
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81 info_dict = {}
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82 for line in file(path).readlines():
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83 if not line or line[0].isspace():
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84 continue # XXX neglects description
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85 assert ':' in line
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86 key, value = [i.strip() for i in line.split(':', 1)]
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87 info_dict[key] = value
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88
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89 # return the information
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90 return info_dict
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91
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92 def _egg_info(self):
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93 """build the egg_info directory"""
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94
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95 # cached result
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96 if getattr(self, '_egg_info_path', None):
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97 return self._egg_info_path
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98
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99 directory = os.path.dirname(self.setup_py)
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100
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101 # setup the egg info
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102 try:
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103 call([sys.executable, 'setup.py', 'egg_info'], cwd=directory, stdout=subprocess.PIPE)
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104 except Exception:
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105 print "Failure to generate egg_info: %s" % self.setup_py
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106 raise
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107
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108 # get the .egg-info directory
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109 egg_info = [i for i in os.listdir(directory)
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110 if i.endswith('.egg-info')]
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111 assert len(egg_info) == 1, 'Expected one .egg-info directory in %s, got: %s' % (directory, egg_info)
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112 egg_info = os.path.join(directory, egg_info[0])
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113 assert os.path.isdir(egg_info), "%s is not a directory" % egg_info
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114
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115 # cache it
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116 self._egg_info_path = egg_info
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117 return self._egg_info_path
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118
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119 def _pkg_info(self):
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120 """returns path to PKG-INFO file"""
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121
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122 if getattr(self, '_pkg_info_path', None):
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123 # return cached value
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124 return self._pkg_info_path
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125
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126 try:
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127 egg_info = self._egg_info()
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128 except Exception, exception:
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129 # try to get the package info from a file
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130 path = os.path.dirname(self.setup_py)
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131 pkg_info = os.path.join(path, 'PKG-INFO')
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132 if os.path.exists(pkg_info):
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133 self._pkg_info_path = pkg_info
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134 return self._pkg_info_path
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135 raise Exception("Cannot find or generate PKG-INFO")
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136
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137 pkg_info = os.path.join(egg_info, 'PKG-INFO')
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138 assert os.path.exists(pkg_info)
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139 self._pkg_info_path = pkg_info
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140 return self._pkg_info_path
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141