Mercurial > hg > PaInt
annotate paint/package.py @ 40:06f21791eba1
add yet another indirection layer
| author | Jeff Hammel <jhammel@mozilla.com> |
|---|---|
| date | Fri, 30 Mar 2012 15:58:13 -0700 |
| parents | cc25499e9485 |
| children | 97a7b740ddab |
| rev | line source |
|---|---|
| 4 | 1 """ |
| 2 package model for python PAckage INTrospection | |
| 3 """ | |
| 4 | |
| 36 | 5 # TODO: use pkginfo.sdist more |
| 6 | |
| 7 | 7 import os |
| 28 | 8 import pip |
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9 import pypi |
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10 import shutil |
| 19 | 11 import subprocess |
| 12 import sys | |
| 7 | 13 import tarfile |
| 5 | 14 import tempfile |
| 7 | 15 import urllib2 |
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16 import urlparse |
| 7 | 17 import utils |
| 5 | 18 |
| 19 | 19 try: |
| 20 from subprocess import check_call as call | |
| 21 except ImportError: | |
| 22 from subporcess import call | |
| 23 | |
| 10 | 24 __all__ = ['Package'] |
| 25 | |
| 4 | 26 class Package(object): |
| 33 | 27 """ |
| 28 class for python package introspection. | |
| 29 constructor takes the package 'src' | |
| 30 """ | |
| 4 | 31 |
| 32 def __init__(self, src): | |
| 33 self.src = src | |
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34 |
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35 # ephemeral data |
| 5 | 36 self._tmppath = None |
| 28 | 37 self._egg_info_path = None |
| 33 | 38 self._build_path = None |
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39 self._pkg_info_path = None |
| 5 | 40 |
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41 # TODO: list of temporary files/directories to be deleted |
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42 |
| 34 | 43 def _path(self): |
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44 """filesystem path to package directory""" |
| 7 | 45 |
| 46 # return cached copy if it exists | |
| 47 if self._tmppath: | |
| 48 return self._tmppath | |
| 49 | |
| 50 # fetch from the web if a URL | |
| 51 tmpfile = None | |
| 52 src = self.src | |
| 5 | 53 if utils.isURL(self.src): |
| 8 | 54 tmpfile = src = self.fetch() |
| 7 | 55 |
| 56 # unpack if an archive | |
| 28 | 57 if self._is_archive(src): |
| 8 | 58 try: |
| 37 | 59 self._unpack(src) |
| 8 | 60 finally: |
| 61 if tmpfile: | |
| 62 os.remove(tmpfile) | |
| 7 | 63 return self._tmppath |
| 64 | |
| 5 | 65 return self.src |
| 66 | |
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67 def fetch(self, filename=None): |
| 8 | 68 """fetch from remote source to a temporary file""" |
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69 if filename is None: |
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70 fd, filename = tempfile.mkstemp() |
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71 os.close(fd) |
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72 fp = file(filename, 'w') |
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73 resource = urllib2.urlopen(self.src) |
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74 fp.write(resource.read()) |
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75 fp.close() |
| 7 | 76 return filename |
| 77 | |
| 37 | 78 def _unpack(self, archive): |
| 7 | 79 """unpack the archive to a temporary destination""" |
| 80 # TODO: should handle zipfile additionally at least | |
| 81 # Ideally, this would be pluggable, etc | |
| 8 | 82 assert tarfile.is_tarfile(archive), "%s is not an archive" % self.src |
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83 tf = tarfile.TarFile.open(archive) |
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84 self._tmppath = tempfile.mkdtemp() |
| 19 | 85 members = tf.getmembers() |
| 86 | |
| 87 # cut off the top level directory | |
| 37 | 88 members = [i for i in members if os.path.sep in i.name] |
| 19 | 89 tld = set() |
| 90 for member in members: | |
| 91 directory, member.name = member.name.split(os.path.sep, 1) | |
| 92 tld.add(directory) | |
| 93 assert len(tld) == 1 | |
| 94 | |
| 95 # extract | |
| 96 for member in members: | |
| 97 tf.extract(member, path=self._tmppath) | |
| 98 tf.close() | |
| 7 | 99 |
| 28 | 100 def _is_archive(self, path): |
| 7 | 101 """returns if the filesystem path is an archive""" |
| 102 # TODO: should handle zipfile additionally at least | |
| 103 # Ideally, this would be pluggable, etc | |
| 104 return tarfile.is_tarfile(path) | |
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105 |
| 28 | 106 def _cleanup(self): |
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107 if self._tmppath: |
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108 shutil.rmtree(self._tmppath) |
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109 self._tmppath = None |
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110 |
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111 # __del__ = cleanup |
| 11 | 112 |
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113 ### python-package-specific functionality |
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114 |
| 28 | 115 def _egg_info(self): |
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116 """build the egg_info directory""" |
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117 |
| 28 | 118 if self._egg_info_path: |
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119 # return cached copy |
| 28 | 120 return self._egg_info_path |
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121 |
| 34 | 122 directory = self._path() |
| 16 | 123 setup_py = os.path.join(directory, 'setup.py') |
| 124 if not os.path.exists(setup_py): | |
| 17 | 125 raise AssertionError("%s does not exist" % setup_py) |
| 11 | 126 |
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127 # setup the egg info |
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128 exception = None |
| 38 | 129 try: |
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130 code = call([sys.executable, 'setup.py', 'egg_info'], cwd=directory, stdout=subprocess.PIPE) |
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131 except BaseException, exception: |
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132 pass |
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133 if code or exception: |
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134 message = """Failure to generate egg_info |
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135 - src: %s |
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136 - directory: %s |
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137 """ % (self.src, directory) |
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138 if exception: |
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139 sys.stderr.write(message) |
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140 raise exception |
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141 else: |
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142 raise Exception(message) |
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143 |
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144 # get the .egg-info directory |
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145 egg_info = [i for i in os.listdir(directory) |
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146 if i.endswith('.egg-info')] |
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147 assert len(egg_info) == 1, 'Expected one .egg-info directory in %s, got: %s' % (directory, egg_info) |
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148 egg_info = os.path.join(directory, egg_info[0]) |
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149 assert os.path.isdir(egg_info), "%s is not a directory" % egg_info |
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150 |
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151 # cache it |
| 28 | 152 self._egg_info_path = egg_info |
| 153 return self._egg_info_path | |
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154 |
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155 def _pkg_info(self): |
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156 """returns path to PKG-INFO file""" |
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157 |
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158 if self._pkg_info_path: |
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159 # return cached value |
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160 return self._pkg_info_path |
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161 |
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162 try: |
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163 egg_info = self._egg_info() |
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164 except BaseException, exception: |
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165 # try to get the package info from a file |
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166 path = self._path() |
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167 pkg_info = os.path.join(path, 'PKG-INFO') |
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168 if os.path.exists(pkg_info): |
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169 self._pkg_info_path = pkg_info |
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170 return self._pkg_info_path |
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171 raise Exception("Cannot find or generate PKG-INFO") |
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172 |
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173 pkg_info = os.path.join(egg_info, 'PKG-INFO') |
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174 assert os.path.exists(pkg_info) |
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175 self._pkg_info_path = pkg_info |
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176 return self._pkg_info_path |
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177 |
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178 def info(self): |
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179 """return info dictionary for package""" |
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180 # could use pkginfo module |
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181 |
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182 pkg_info = self._pkg_info() |
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183 |
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184 # read the package information |
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185 info_dict = {} |
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186 for line in file(pkg_info).readlines(): |
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187 if not line or line[0].isspace(): |
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188 continue # XXX neglects description |
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189 assert ':' in line |
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190 key, value = [i.strip() for i in line.split(':', 1)] |
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191 info_dict[key] = value |
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192 |
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193 # return the information |
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194 return info_dict |
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195 |
| 11 | 196 def dependencies(self): |
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197 """return the dependencies""" |
| 32 | 198 # TODO: should probably have a more detailed dict: |
| 199 # {'mozinfo': {'version': '>= 0.2', | |
| 200 # 'url': 'http://something.com/'}} | |
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201 # get the egg_info directory |
| 28 | 202 egg_info = self._egg_info() |
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203 |
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204 # read the dependencies |
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205 requires = os.path.join(egg_info, 'requires.txt') |
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206 if os.path.exists(requires): |
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207 dependencies = [i.strip() for i in file(requires).readlines() if i.strip()] |
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208 else: |
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209 dependencies = [] |
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210 dependencies = dict([(i, None) for i in dependencies]) |
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211 |
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212 # read the dependency links |
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213 dependency_links = os.path.join(egg_info, 'dependency_links.txt') |
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214 if os.path.exists(dependency_links): |
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215 links = [i.strip() for i in file(dependency_links).readlines() if i.strip()] |
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216 for link in links: |
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217 # XXX pretty ghetto |
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218 assert '#egg=' in link |
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219 url, dep = link.split('#egg=', 1) |
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220 if dep in dependencies: |
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221 dependencies[dep] = link |
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222 |
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223 return dependencies |
| 24 | 224 |
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225 def extension(self): |
| 35 | 226 """filename extension of the package""" |
| 227 | |
| 228 package = self.package() | |
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229 |
| 35 | 230 # determine the extension (XXX hacky) |
| 231 extensions = ('.tar.gz', '.zip', '.tar.bz2') | |
| 232 for ext in extensions: | |
| 36 | 233 if package.endswith(ext): |
| 35 | 234 return ext |
| 235 | |
| 236 raise Exception("Extension %s not found: %s" % (extensions, package)) | |
| 237 | |
| 238 def package(self, destination=None): | |
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239 """ |
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240 repackage the package to ensure its actually in the right form |
| 34 | 241 and return the path to the destination |
| 242 - destination: if given, path to put the build in [TODO] | |
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243 """ |
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244 |
| 33 | 245 if self._build_path: |
| 34 | 246 if destination: |
| 247 shutil.copy(self._build_path, destination) | |
| 248 return os.path.abspath(destination) | |
| 249 | |
| 250 # return cached copy | |
| 33 | 251 return self._build_path |
| 252 | |
| 34 | 253 path = self._path() |
| 254 dist = os.path.join(path, 'dist') | |
| 255 if os.path.exists(dist): | |
| 256 shutil.rmtree(dist) | |
| 257 | |
| 258 call([sys.executable, 'setup.py', 'sdist'], cwd=path, stdout=subprocess.PIPE) | |
| 259 | |
| 260 assert os.path.exists(dist) | |
| 261 contents = os.listdir(dist) | |
| 262 assert len(contents) == 1 | |
| 263 | |
| 264 self._build_path = os.path.join(dist, contents[0]) | |
| 265 | |
| 266 # destination | |
| 267 # use an evil recursive trick | |
| 268 if destination: | |
| 36 | 269 return self.package(destination=destination) |
| 34 | 270 |
| 271 return self._build_path | |
| 272 | |
| 24 | 273 def download(self, directory): |
| 274 """download a package and all its dependencies using pip""" | |
| 28 | 275 if not os.path.exists(directory): |
| 276 os.makedirs(directory) | |
| 277 assert os.path.isdir(directory) | |
| 278 pip.main(['install', '--download', directory, self.src]) | |
| 279 | |
| 280 def pypi(self, directory): | |
| 281 """ | |
| 282 download packages for a pypi directory structure | |
| 283 http://k0s.org/portfolio/pypi.html | |
| 284 """ | |
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285 if not os.path.exists(directory): |
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286 os.makedirs(directory) |
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287 assert os.path.isdir(directory) |
| 28 | 288 tempdir = tempfile.mkdtemp() |
| 289 try: | |
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290 self.download(tempdir) |
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291 for package in os.listdir(tempdir): |
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292 |
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293 # full path |
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294 src = os.path.join(tempdir, package) |
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295 |
| 35 | 296 # make a package of the thing |
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297 package = Package(src) |
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298 |
| 36 | 299 # get destination dirname, filename |
| 300 dirname, filename = package.pypi_path() | |
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301 |
| 36 | 302 # make the directory if it doesn't exist |
| 303 subdir = os.path.join(directory, dirname) | |
| 304 if not os.path.exists(subdir): | |
| 305 os.makedirs(subdir) | |
| 306 assert os.path.isdir(subdir) | |
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307 |
| 36 | 308 # move the file |
| 309 self.package(destination=os.path.join(subdir, filename)) | |
| 28 | 310 finally: |
| 311 shutil.rmtree(tempdir) | |
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312 |
| 36 | 313 def pypi_path(self): |
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314 """ |
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315 returns subpath 2-tuple appropriate for pypi path structure: |
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316 http://k0s.org/portfolio/pypi.html |
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317 """ |
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318 info = self.info() |
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319 |
| 36 | 320 # determine the extension |
| 321 extension = self.extension() | |
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322 |
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323 # get the filename destination |
| 36 | 324 name = info['Name'] |
| 325 version = info['Version'] | |
| 326 filename = '%s-%s%s' % (name, version, extension) | |
| 327 return name, filename |