annotate paint/package.py @ 63:ad174d9f396d

docstring
author Jeff Hammel <jhammel@mozilla.com>
date Fri, 25 Jan 2013 11:10:07 -0800
parents 726008cff4e3
children 1a279bac0afa
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1 """
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2 package model for python PAckage INTrospection
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3 """
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4
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5 # TODO: use pkginfo.sdist more
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6
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7 import info
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8 import os
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9 import pip
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10 import shutil
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11 import subprocess
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12 import sys
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13 import tarfile
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14 import tempfile
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15 import urllib2
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16 import urlparse
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17 import utils
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18
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19 from subprocess import check_call as call
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20
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21 __all__ = ['Package']
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22
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23 class Package(object):
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24 """
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25 class for python package introspection.
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26 constructor takes the package 'src'
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27 """
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29 def __init__(self, src, verbose=True):
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30 """
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31 - src : URL or filesystem path to the package
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32 """
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33 self.src = src
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34 self.verbose = verbose
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35
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36 # ephemeral data
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37 self._tmppath = None
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38 self._egg_info_path = None
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39 self._build_path = None
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40 self._pkg_info_path = None
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41
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42 # TODO: list of temporary files/directories to be deleted
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43
49
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44 def _log(self, message):
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45 if self.verbose:
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46 print '>>> %s' % message
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47
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48 def _path(self):
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49 """filesystem path to package directory"""
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51 self._log(">>> _path:Getting path to package")
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52
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53 # return cached copy if it exists
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54 if self._tmppath:
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55 return self._tmppath
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56
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57 # fetch from the web if a URL
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58 tmpfile = None
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59 src = self.src
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60 if utils.isURL(self.src):
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61 tmpfile = src = self.fetch()
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63 # unpack if an archive
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64 if self._is_archive(src):
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65 try:
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66 self._unpack(src)
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67 finally:
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68 if tmpfile:
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69 os.remove(tmpfile)
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70 return self._tmppath
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71
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72 return self.src
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73
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74 def fetch(self, filename=None):
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75 """fetch from remote source to a temporary file"""
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76 if filename is None:
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77 fd, filename = tempfile.mkstemp()
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78 os.close(fd)
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79 fp = file(filename, 'w')
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80 resource = urllib2.urlopen(self.src)
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81 fp.write(resource.read())
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82 fp.close()
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83 return filename
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84
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85 def _unpack(self, archive):
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86 """unpack the archive to a temporary destination"""
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87 # TODO: should handle zipfile additionally at least
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88 # Ideally, this would be pluggable, etc
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89 assert tarfile.is_tarfile(archive), "%s is not an archive" % self.src
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90 tf = tarfile.TarFile.open(archive)
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91 self._tmppath = tempfile.mkdtemp()
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92 members = tf.getmembers()
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93
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94 # cut off the top level directory
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95 members = [i for i in members if os.path.sep in i.name]
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96 tld = set()
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97 for member in members:
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98 directory, member.name = member.name.split(os.path.sep, 1)
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99 tld.add(directory)
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100 assert len(tld) == 1
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101
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102 # extract
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103 for member in members:
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104 tf.extract(member, path=self._tmppath)
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105 tf.close()
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106
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107 def _is_archive(self, path):
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108 """returns if the filesystem path is an archive"""
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109 # TODO: should handle zipfile additionally at least
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110 # Ideally, this would be pluggable, etc
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111 return tarfile.is_tarfile(path)
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112
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113 def _cleanup(self):
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114 if self._tmppath:
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115 shutil.rmtree(self._tmppath)
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116 self._tmppath = None
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117
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118 # __del__ = cleanup
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119
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120 ### python-package-specific functionality
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121
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122 def _egg_info(self):
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123 """build the egg_info directory"""
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124
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125 if self._egg_info_path:
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126 # return cached copy
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127 return self._egg_info_path
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128
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129 directory = self._path()
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130 setup_py = os.path.join(directory, 'setup.py')
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131 if not os.path.exists(setup_py):
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132 raise AssertionError("%s does not exist" % setup_py)
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133
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134 # setup the egg info
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135 exception = None
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136 try:
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137 code = call([sys.executable, 'setup.py', 'egg_info'], cwd=directory, stdout=subprocess.PIPE)
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138 except Exception, exception:
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139 pass
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140 if code or exception:
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141 message = """Failure to generate egg_info
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142 - src: %s
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143 - directory: %s
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144 """ % (self.src, directory)
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145 if exception:
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146 sys.stderr.write(message)
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147 raise exception
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148 else:
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149 raise Exception(message)
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150
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151 # get the .egg-info directory
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152 egg_info = [i for i in os.listdir(directory)
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153 if i.endswith('.egg-info')]
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154 assert len(egg_info) == 1, 'Expected one .egg-info directory in %s, got: %s' % (directory, egg_info)
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155 egg_info = os.path.join(directory, egg_info[0])
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156 assert os.path.isdir(egg_info), "%s is not a directory" % egg_info
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157
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158 # cache it
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159 self._egg_info_path = egg_info
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160 return self._egg_info_path
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161
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162 def _pkg_info(self):
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163 """returns path to PKG-INFO file"""
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164
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165 if self._pkg_info_path:
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166 # return cached value
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167 return self._pkg_info_path
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168
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169 try:
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170 egg_info = self._egg_info()
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171 except Exception, exception:
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172 # try to get the package info from a file
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173 path = self._path()
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174 pkg_info = os.path.join(path, 'PKG-INFO')
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175 if os.path.exists(pkg_info):
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176 self._pkg_info_path = pkg_info
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177 return self._pkg_info_path
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178 raise Exception("Cannot find or generate PKG-INFO")
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179
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180 pkg_info = os.path.join(egg_info, 'PKG-INFO')
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181 assert os.path.exists(pkg_info)
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182 self._pkg_info_path = pkg_info
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183 return self._pkg_info_path
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184
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185 def info(self):
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186 """return info dictionary for package"""
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187 # could use pkginfo module
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188
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189 self._log(">>> Getting the info")
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190
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191 pkg_info = self._pkg_info()
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192
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193 # read the package information
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194 info_dict = {}
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195 for line in file(pkg_info).readlines():
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196 if not line or line[0].isspace():
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197 continue # XXX neglects description
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198 assert ':' in line
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199 key, value = [i.strip() for i in line.split(':', 1)]
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200 info_dict[key] = value
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201
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202 # return the information
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203 return info_dict
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204
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205 def dependencies(self):
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206 """return the dependencies"""
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207 # TODO: should probably have a more detailed dict:
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208 # {'mozinfo': {'version': '>= 0.2',
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209 # 'url': 'http://something.com/'}}
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210 # get the egg_info directory
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211 egg_info = self._egg_info()
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212
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213 # read the dependencies
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214 requires = os.path.join(egg_info, 'requires.txt')
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215 if os.path.exists(requires):
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216 dependencies = [i.strip() for i in file(requires).readlines() if i.strip()]
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217 else:
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218 dependencies = []
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219 dependencies = dict([(i, None) for i in dependencies])
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220
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221 # read the dependency links
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222 dependency_links = os.path.join(egg_info, 'dependency_links.txt')
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223 if os.path.exists(dependency_links):
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224 links = [i.strip() for i in file(dependency_links).readlines() if i.strip()]
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225 for link in links:
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226 # XXX pretty ghetto
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227 assert '#egg=' in link
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228 url, dep = link.split('#egg=', 1)
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229 if dep in dependencies:
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230 dependencies[dep] = link
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231
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232 return dependencies
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233
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234 def extension(self):
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235 """filename extension of the package"""
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236
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237 print ">>> extension:Getting package"
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238 package = self.package()
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239 print ">>> extension:package=%s" % package
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240
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241 # determine the extension (XXX hacky)
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242 extensions = ('.tar.gz', '.zip', '.tar.bz2')
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243 for ext in extensions:
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244 if package.endswith(ext):
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245 return ext
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246
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247 raise Exception("Extension %s not found: %s" % (extensions, package))
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248
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249 def package(self, destination=None):
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250 """
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251 repackage the package to ensure its actually in the right form
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252 and return the path to the destination
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253 - destination: if given, path to put the build in
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254 """
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255
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256 self._log("package: Getting package directory, destination=%s" % repr(destination))
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257
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258 if self._build_path:
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259 self._log("package: build_path already set: %s" % self._build_path)
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260 if destination:
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261 shutil.copy(self._build_path, destination)
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262 return os.path.abspath(destination)
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263
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264 # return cached copy
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265 return self._build_path
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266
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267 path = self._path()
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268 dist = os.path.join(path, 'dist')
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269 self._log("package: dist directory: %s; (path=%s)" % (dist, path))
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270 if os.path.exists(dist):
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271 shutil.rmtree(dist)
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272
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273 command = [sys.executable, 'setup.py', 'sdist']
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274 self._log("package: running: %s" % ' '.join(command))
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275 call(command, cwd=path)
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276 self._log("package: done running setup.py dist")
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277
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278 assert os.path.exists(dist)
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279 contents = os.listdir(dist)
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280 assert len(contents) == 1
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281
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282 self._build_path = os.path.join(dist, contents[0])
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283
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284 # destination
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285 # use an evil recursive trick
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286 if destination:
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287 return self.package(destination=destination)
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288
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289 return self._build_path
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290
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291 def download(self, directory):
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292 """download a package and all its dependencies using pip"""
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293 if not os.path.exists(directory):
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294 os.makedirs(directory)
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295 assert os.path.isdir(directory)
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296 pip.main(['install', '--download', directory, self.src])
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297
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298 def pypi(self, directory):
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299 """
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300 download packages for a pypi directory structure
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301 http://k0s.org/portfolio/pypi.html
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302 """
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303 if not os.path.exists(directory):
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304 os.makedirs(directory)
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305 assert os.path.isdir(directory)
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306 tempdir = tempfile.mkdtemp()
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307 try:
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308 self.download(tempdir)
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309 files = os.listdir(tempdir)
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310 self._log(">>> Files: %s" % files)
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311 for f in files:
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312
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313 # full path
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314 src = os.path.join(tempdir, f)
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315
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316 # make a package of the thing
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317 print ">>> pypi:Packaging %s" % src
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318 package = Package(src)
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319 print ">>> pypi:DONE packaging %s" % src
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320
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321 # get destination dirname, filename
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322 print ">>> pypi:Getting PyPI path"
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323 dirname, filename = package.pypi_path()
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324 print ">>> pypi:DONE PyPI path: %s/%s" % (dirname, filename)
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diff changeset
325
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326 # make the directory if it doesn't exist
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327 subdir = os.path.join(directory, dirname)
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328 if not os.path.exists(subdir):
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329 os.makedirs(subdir)
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330 assert os.path.isdir(subdir)
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331
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332 # move the file
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333 print ">>> pypi:Moving to PyPI path %s/%s" % (subdir, filename)
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334 package.package(destination=os.path.join(subdir, filename))
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335 print ">>> Done with %s" % src
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336 finally:
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337 shutil.rmtree(tempdir)
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338
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339 def pypi_path(self):
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340 """
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341 returns subpath 2-tuple appropriate for pypi path structure:
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342 http://k0s.org/portfolio/pypi.html
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343 """
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344 print ">>> pypi_path:Getting info"
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345 info = self.info()
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346 print ">>> pypi_path:DONE getting info"
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347
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348 # determine the extension
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349 print ">>> pypi_path:Getting extension"
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350 extension = self.extension()
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351 print ">>> pypi_path:DONE Getting extension: %s" % extension
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352
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353 # get the filename destination
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354 name = info['Name']
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355 version = info['Version']
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356 filename = '%s-%s%s' % (name, version, extension)
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357 return name, filename