annotate paint/package.py @ 48:abfb267e8332

debugging info; lord i hate this
author Jeff Hammel <jhammel@mozilla.com>
date Tue, 08 May 2012 10:45:16 -0700
parents 213cf933366d
children 85374a69cf89
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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 os
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8 import pip
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9 import shutil
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10 import subprocess
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11 import sys
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12 import tarfile
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13 import tempfile
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14 import urllib2
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15 import urlparse
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16 import utils
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17
19
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18 try:
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19 from subprocess import check_call as call
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20 except ImportError:
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21 from subprocess import call
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22
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23 __all__ = ['Package']
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24
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25 class Package(object):
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26 """
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27 class for python package introspection.
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28 constructor takes the package 'src'
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29 """
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30
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31 def __init__(self, src):
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32 self.src = src
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33
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34 # ephemeral data
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35 self._tmppath = None
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36 self._egg_info_path = None
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37 self._build_path = None
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38 self._pkg_info_path = None
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39
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40 # TODO: list of temporary files/directories to be deleted
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41
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42 def _path(self):
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43 """filesystem path to package directory"""
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44
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45 print ">>> Getting path to package"
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46
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47 # return cached copy if it exists
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48 if self._tmppath:
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49 return self._tmppath
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50
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51 # fetch from the web if a URL
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52 tmpfile = None
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53 src = self.src
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54 if utils.isURL(self.src):
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55 tmpfile = src = self.fetch()
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56
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57 # unpack if an archive
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58 if self._is_archive(src):
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59 try:
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60 self._unpack(src)
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61 finally:
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62 if tmpfile:
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63 os.remove(tmpfile)
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64 return self._tmppath
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65
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66 return self.src
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67
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68 def fetch(self, filename=None):
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69 """fetch from remote source to a temporary file"""
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70 if filename is None:
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71 fd, filename = tempfile.mkstemp()
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72 os.close(fd)
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73 fp = file(filename, 'w')
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74 resource = urllib2.urlopen(self.src)
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75 fp.write(resource.read())
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76 fp.close()
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77 return filename
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78
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79 def _unpack(self, archive):
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80 """unpack the archive to a temporary destination"""
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81 # TODO: should handle zipfile additionally at least
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82 # Ideally, this would be pluggable, etc
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83 assert tarfile.is_tarfile(archive), "%s is not an archive" % self.src
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84 tf = tarfile.TarFile.open(archive)
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85 self._tmppath = tempfile.mkdtemp()
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86 members = tf.getmembers()
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87
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88 # cut off the top level directory
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89 members = [i for i in members if os.path.sep in i.name]
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90 tld = set()
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91 for member in members:
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92 directory, member.name = member.name.split(os.path.sep, 1)
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93 tld.add(directory)
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94 assert len(tld) == 1
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95
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96 # extract
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97 for member in members:
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98 tf.extract(member, path=self._tmppath)
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99 tf.close()
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100
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101 def _is_archive(self, path):
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102 """returns if the filesystem path is an archive"""
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103 # TODO: should handle zipfile additionally at least
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104 # Ideally, this would be pluggable, etc
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105 return tarfile.is_tarfile(path)
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106
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107 def _cleanup(self):
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108 if self._tmppath:
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109 shutil.rmtree(self._tmppath)
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110 self._tmppath = None
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111
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112 # __del__ = cleanup
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113
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114 ### python-package-specific functionality
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115
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116 def _egg_info(self):
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117 """build the egg_info directory"""
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118
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119 if self._egg_info_path:
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120 # return cached copy
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121 return self._egg_info_path
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122
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123 directory = self._path()
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124 setup_py = os.path.join(directory, 'setup.py')
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125 if not os.path.exists(setup_py):
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126 raise AssertionError("%s does not exist" % setup_py)
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127
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128 # setup the egg info
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129 exception = None
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130 try:
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131 code = call([sys.executable, 'setup.py', 'egg_info'], cwd=directory, stdout=subprocess.PIPE)
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132 except Exception, exception:
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133 pass
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134 if code or exception:
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135 message = """Failure to generate egg_info
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136 - src: %s
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137 - directory: %s
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138 """ % (self.src, directory)
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139 if exception:
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140 sys.stderr.write(message)
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141 raise exception
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142 else:
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143 raise Exception(message)
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144
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145 # get the .egg-info directory
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146 egg_info = [i for i in os.listdir(directory)
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147 if i.endswith('.egg-info')]
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148 assert len(egg_info) == 1, 'Expected one .egg-info directory in %s, got: %s' % (directory, egg_info)
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149 egg_info = os.path.join(directory, egg_info[0])
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150 assert os.path.isdir(egg_info), "%s is not a directory" % egg_info
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151
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152 # cache it
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153 self._egg_info_path = egg_info
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154 return self._egg_info_path
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155
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156 def _pkg_info(self):
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157 """returns path to PKG-INFO file"""
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158
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159 if self._pkg_info_path:
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160 # return cached value
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161 return self._pkg_info_path
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162
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163 try:
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164 egg_info = self._egg_info()
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165 except Exception, exception:
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166 # try to get the package info from a file
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167 path = self._path()
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168 pkg_info = os.path.join(path, 'PKG-INFO')
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169 if os.path.exists(pkg_info):
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170 self._pkg_info_path = pkg_info
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171 return self._pkg_info_path
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172 raise Exception("Cannot find or generate PKG-INFO")
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173
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174 pkg_info = os.path.join(egg_info, 'PKG-INFO')
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175 assert 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
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179 def info(self):
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180 """return info dictionary for package"""
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181 # could use pkginfo module
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182
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183 print ">>> Getting the info"""
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184
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185 pkg_info = self._pkg_info()
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186
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187 # read the package information
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188 info_dict = {}
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189 for line in file(pkg_info).readlines():
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190 if not line or line[0].isspace():
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191 continue # XXX neglects description
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192 assert ':' in line
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193 key, value = [i.strip() for i in line.split(':', 1)]
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194 info_dict[key] = value
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195
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196 # return the information
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197 print ">>> Info: %s" % info_dict
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198 return info_dict
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199
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200 def dependencies(self):
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201 """return the dependencies"""
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202 # TODO: should probably have a more detailed dict:
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203 # {'mozinfo': {'version': '>= 0.2',
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204 # 'url': 'http://something.com/'}}
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205 # get the egg_info directory
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206 egg_info = self._egg_info()
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207
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208 # read the dependencies
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209 requires = os.path.join(egg_info, 'requires.txt')
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210 if os.path.exists(requires):
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211 dependencies = [i.strip() for i in file(requires).readlines() if i.strip()]
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212 else:
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213 dependencies = []
21
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214 dependencies = dict([(i, None) for i in dependencies])
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215
21
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216 # read the dependency links
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217 dependency_links = os.path.join(egg_info, 'dependency_links.txt')
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218 if os.path.exists(dependency_links):
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219 links = [i.strip() for i in file(dependency_links).readlines() if i.strip()]
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220 for link in links:
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221 # XXX pretty ghetto
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222 assert '#egg=' in link
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223 url, dep = link.split('#egg=', 1)
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224 if dep in dependencies:
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225 dependencies[dep] = link
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226
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227 return dependencies
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228
31
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229 def extension(self):
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230 """filename extension of the package"""
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231
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232 package = self.package()
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233
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234 # determine the extension (XXX hacky)
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235 extensions = ('.tar.gz', '.zip', '.tar.bz2')
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236 for ext in extensions:
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237 if package.endswith(ext):
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238 return ext
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239
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240 raise Exception("Extension %s not found: %s" % (extensions, package))
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241
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242 def package(self, destination=None):
31
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243 """
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244 repackage the package to ensure its actually in the right form
34
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245 and return the path to the destination
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246 - destination: if given, path to put the build in [TODO]
31
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247 """
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248
33
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249 if self._build_path:
34
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250 if destination:
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251 shutil.copy(self._build_path, destination)
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252 return os.path.abspath(destination)
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253
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254 # return cached copy
33
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255 return self._build_path
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256
34
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257 path = self._path()
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258 dist = os.path.join(path, 'dist')
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259 if os.path.exists(dist):
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260 shutil.rmtree(dist)
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261
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262 call([sys.executable, 'setup.py', 'sdist'], cwd=path, stdout=subprocess.PIPE)
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263
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264 assert os.path.exists(dist)
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265 contents = os.listdir(dist)
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266 assert len(contents) == 1
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267
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268 self._build_path = os.path.join(dist, contents[0])
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269
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270 # destination
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271 # use an evil recursive trick
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272 if destination:
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273 return self.package(destination=destination)
34
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274
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275 return self._build_path
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276
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277 def download(self, directory):
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278 """download a package and all its dependencies using pip"""
28
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279 if not os.path.exists(directory):
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280 os.makedirs(directory)
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281 assert os.path.isdir(directory)
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282 pip.main(['install', '--download', directory, self.src])
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283
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284 def pypi(self, directory):
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285 """
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286 download packages for a pypi directory structure
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287 http://k0s.org/portfolio/pypi.html
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288 """
29
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289 if not os.path.exists(directory):
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290 os.makedirs(directory)
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291 assert os.path.isdir(directory)
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292 tempdir = tempfile.mkdtemp()
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293 try:
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294 self.download(tempdir)
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295 files = os.listdir(tempdir)
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296 print ">>> Files: %s" % files
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297 for f in files:
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298
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299 # full path
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300 src = os.path.join(tempdir, f)
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301
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302 # make a package of the thing
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303 print ">>> pypi:Packaging %s" % src
31
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304 package = Package(src)
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305 print ">>> pypi:DONE packaging %s" % src
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306
36
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307 # get destination dirname, filename
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308 print ">>> pypi:Getting PyPI path"
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309 dirname, filename = package.pypi_path()
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310 print ">>> pypi:DONE PyPI path: %s/%s" % (dirname, filename)
29
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diff changeset
311
36
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diff changeset
312 # make the directory if it doesn't exist
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313 subdir = os.path.join(directory, dirname)
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diff changeset
314 if not os.path.exists(subdir):
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diff changeset
315 os.makedirs(subdir)
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diff changeset
316 assert os.path.isdir(subdir)
29
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diff changeset
317
36
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diff changeset
318 # move the file
48
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diff changeset
319 print ">>> pypi:Moving to PyPI path %s/%s" % (subdir, filename)
47
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diff changeset
320 package.package(destination=os.path.join(subdir, filename))
48
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diff changeset
321 print ">>> Done with %s" % src
28
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diff changeset
322 finally:
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diff changeset
323 shutil.rmtree(tempdir)
31
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diff changeset
324
36
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325 def pypi_path(self):
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326 """
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327 returns subpath 2-tuple appropriate for pypi path structure:
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328 http://k0s.org/portfolio/pypi.html
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329 """
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330 print ">>> pypi_path:Getting info"
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331 info = self.info()
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332 print ">>> pypi_path:DONE getting info"
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333
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334 # determine the extension
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335 print ">>> pypi_path:Getting extension"
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336 extension = self.extension()
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337 print ">>> pypi_path:DONE Getting extension: %s" % extension
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338
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339 # get the filename destination
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340 name = info['Name']
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341 version = info['Version']
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342 filename = '%s-%s%s' % (name, version, extension)
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343 return name, filename