Mercurial > hg > PaInt
annotate paint/package.py @ 39:cc25499e9485
note TODO....and cry a little
| author | Jeff Hammel <jhammel@mozilla.com> |
|---|---|
| date | Fri, 30 Mar 2012 15:46:37 -0700 |
| parents | c9d8abb2026f |
| children | 06f21791eba1 |
| 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 |
| 5 | 39 |
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40 # TODO: list of temporary files/directories to be deleted |
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41 |
| 34 | 42 def _path(self): |
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43 """filesystem path to package directory""" |
| 7 | 44 |
| 45 # return cached copy if it exists | |
| 46 if self._tmppath: | |
| 47 return self._tmppath | |
| 48 | |
| 49 # fetch from the web if a URL | |
| 50 tmpfile = None | |
| 51 src = self.src | |
| 5 | 52 if utils.isURL(self.src): |
| 8 | 53 tmpfile = src = self.fetch() |
| 7 | 54 |
| 55 # unpack if an archive | |
| 28 | 56 if self._is_archive(src): |
| 8 | 57 try: |
| 37 | 58 self._unpack(src) |
| 8 | 59 finally: |
| 60 if tmpfile: | |
| 61 os.remove(tmpfile) | |
| 7 | 62 return self._tmppath |
| 63 | |
| 5 | 64 return self.src |
| 65 | |
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66 def fetch(self, filename=None): |
| 8 | 67 """fetch from remote source to a temporary file""" |
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68 if filename is None: |
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69 fd, filename = tempfile.mkstemp() |
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70 os.close(fd) |
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71 fp = file(filename, 'w') |
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72 resource = urllib2.urlopen(self.src) |
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73 fp.write(resource.read()) |
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74 fp.close() |
| 7 | 75 return filename |
| 76 | |
| 37 | 77 def _unpack(self, archive): |
| 7 | 78 """unpack the archive to a temporary destination""" |
| 79 # TODO: should handle zipfile additionally at least | |
| 80 # Ideally, this would be pluggable, etc | |
| 8 | 81 assert tarfile.is_tarfile(archive), "%s is not an archive" % self.src |
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82 tf = tarfile.TarFile.open(archive) |
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83 self._tmppath = tempfile.mkdtemp() |
| 19 | 84 members = tf.getmembers() |
| 85 | |
| 86 # cut off the top level directory | |
| 37 | 87 members = [i for i in members if os.path.sep in i.name] |
| 19 | 88 tld = set() |
| 89 for member in members: | |
| 90 directory, member.name = member.name.split(os.path.sep, 1) | |
| 91 tld.add(directory) | |
| 92 assert len(tld) == 1 | |
| 93 | |
| 94 # extract | |
| 95 for member in members: | |
| 96 tf.extract(member, path=self._tmppath) | |
| 97 tf.close() | |
| 7 | 98 |
| 28 | 99 def _is_archive(self, path): |
| 7 | 100 """returns if the filesystem path is an archive""" |
| 101 # TODO: should handle zipfile additionally at least | |
| 102 # Ideally, this would be pluggable, etc | |
| 103 return tarfile.is_tarfile(path) | |
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104 |
| 28 | 105 def _cleanup(self): |
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106 if self._tmppath: |
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107 shutil.rmtree(self._tmppath) |
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108 self._tmppath = None |
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109 |
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110 # __del__ = cleanup |
| 11 | 111 |
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112 ### python-package-specific functionality |
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113 |
| 28 | 114 def _egg_info(self): |
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115 """build the egg_info directory""" |
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116 |
| 28 | 117 if self._egg_info_path: |
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118 # return cached copy |
| 28 | 119 return self._egg_info_path |
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120 |
| 34 | 121 directory = self._path() |
| 16 | 122 setup_py = os.path.join(directory, 'setup.py') |
| 123 if not os.path.exists(setup_py): | |
| 17 | 124 raise AssertionError("%s does not exist" % setup_py) |
| 11 | 125 |
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126 # setup the egg info |
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127 exception = None |
| 38 | 128 try: |
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129 code = call([sys.executable, 'setup.py', 'egg_info'], cwd=directory, stdout=subprocess.PIPE) |
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130 except BaseException, exception: |
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131 pass |
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132 if code or exception: |
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133 message = """Failure to generate egg_info |
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134 - src: %s |
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135 - directory: %s |
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136 """ % (self.src, directory) |
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137 if exception: |
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138 sys.stderr.write(message) |
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139 raise exception |
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140 else: |
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141 raise Exception(message) |
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142 |
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143 # get the .egg-info directory |
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144 egg_info = [i for i in os.listdir(directory) |
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145 if i.endswith('.egg-info')] |
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146 assert len(egg_info) == 1, 'Expected one .egg-info directory in %s, got: %s' % (directory, egg_info) |
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147 egg_info = os.path.join(directory, egg_info[0]) |
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148 assert os.path.isdir(egg_info), "%s is not a directory" % egg_info |
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149 |
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150 # cache it |
| 28 | 151 self._egg_info_path = egg_info |
| 152 return self._egg_info_path | |
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153 |
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154 def info(self): |
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155 """return info dictionary for package""" |
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156 # could use pkginfo |
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157 |
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158 if self._pkg_info_path: |
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159 pkg_info = self._pkg_info_path |
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160 else: |
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161 try: |
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162 egg_info = self._egg_info() |
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163 pkg_info = os.path.join(egg_info, 'PKG-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 raise NotImplementedError("TODO: try to get the package info from a file") |
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167 |
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168 # read the package information |
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169 info_dict = {} |
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170 for line in file(pkg_info).readlines(): |
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171 if not line or line[0].isspace(): |
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172 continue # XXX neglects description |
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173 assert ':' in line |
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174 key, value = [i.strip() for i in line.split(':', 1)] |
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175 info_dict[key] = value |
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176 |
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177 # return the information |
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178 return info_dict |
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179 |
| 11 | 180 def dependencies(self): |
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181 """return the dependencies""" |
| 32 | 182 # TODO: should probably have a more detailed dict: |
| 183 # {'mozinfo': {'version': '>= 0.2', | |
| 184 # 'url': 'http://something.com/'}} | |
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185 # get the egg_info directory |
| 28 | 186 egg_info = self._egg_info() |
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187 |
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188 # read the dependencies |
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189 requires = os.path.join(egg_info, 'requires.txt') |
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190 if os.path.exists(requires): |
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191 dependencies = [i.strip() for i in file(requires).readlines() if i.strip()] |
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192 else: |
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193 dependencies = [] |
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194 dependencies = dict([(i, None) for i in dependencies]) |
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195 |
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196 # read the dependency links |
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197 dependency_links = os.path.join(egg_info, 'dependency_links.txt') |
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198 if os.path.exists(dependency_links): |
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199 links = [i.strip() for i in file(dependency_links).readlines() if i.strip()] |
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200 for link in links: |
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201 # XXX pretty ghetto |
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202 assert '#egg=' in link |
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203 url, dep = link.split('#egg=', 1) |
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204 if dep in dependencies: |
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205 dependencies[dep] = link |
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206 |
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207 return dependencies |
| 24 | 208 |
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209 def extension(self): |
| 35 | 210 """filename extension of the package""" |
| 211 | |
| 212 package = self.package() | |
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213 |
| 35 | 214 # determine the extension (XXX hacky) |
| 215 extensions = ('.tar.gz', '.zip', '.tar.bz2') | |
| 216 for ext in extensions: | |
| 36 | 217 if package.endswith(ext): |
| 35 | 218 return ext |
| 219 | |
| 220 raise Exception("Extension %s not found: %s" % (extensions, package)) | |
| 221 | |
| 222 def package(self, destination=None): | |
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223 """ |
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224 repackage the package to ensure its actually in the right form |
| 34 | 225 and return the path to the destination |
| 226 - destination: if given, path to put the build in [TODO] | |
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227 """ |
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228 |
| 33 | 229 if self._build_path: |
| 34 | 230 if destination: |
| 231 shutil.copy(self._build_path, destination) | |
| 232 return os.path.abspath(destination) | |
| 233 | |
| 234 # return cached copy | |
| 33 | 235 return self._build_path |
| 236 | |
| 34 | 237 path = self._path() |
| 238 dist = os.path.join(path, 'dist') | |
| 239 if os.path.exists(dist): | |
| 240 shutil.rmtree(dist) | |
| 241 | |
| 242 call([sys.executable, 'setup.py', 'sdist'], cwd=path, stdout=subprocess.PIPE) | |
| 243 | |
| 244 assert os.path.exists(dist) | |
| 245 contents = os.listdir(dist) | |
| 246 assert len(contents) == 1 | |
| 247 | |
| 248 self._build_path = os.path.join(dist, contents[0]) | |
| 249 | |
| 250 # destination | |
| 251 # use an evil recursive trick | |
| 252 if destination: | |
| 36 | 253 return self.package(destination=destination) |
| 34 | 254 |
| 255 return self._build_path | |
| 256 | |
| 24 | 257 def download(self, directory): |
| 258 """download a package and all its dependencies using pip""" | |
| 28 | 259 if not os.path.exists(directory): |
| 260 os.makedirs(directory) | |
| 261 assert os.path.isdir(directory) | |
| 262 pip.main(['install', '--download', directory, self.src]) | |
| 263 | |
| 264 def pypi(self, directory): | |
| 265 """ | |
| 266 download packages for a pypi directory structure | |
| 267 http://k0s.org/portfolio/pypi.html | |
| 268 """ | |
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269 if not os.path.exists(directory): |
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270 os.makedirs(directory) |
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271 assert os.path.isdir(directory) |
| 28 | 272 tempdir = tempfile.mkdtemp() |
| 273 try: | |
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274 self.download(tempdir) |
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275 for package in os.listdir(tempdir): |
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276 |
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277 # full path |
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278 src = os.path.join(tempdir, package) |
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279 |
| 35 | 280 # make a package of the thing |
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281 package = Package(src) |
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282 |
| 36 | 283 # get destination dirname, filename |
| 284 dirname, filename = package.pypi_path() | |
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285 |
| 36 | 286 # make the directory if it doesn't exist |
| 287 subdir = os.path.join(directory, dirname) | |
| 288 if not os.path.exists(subdir): | |
| 289 os.makedirs(subdir) | |
| 290 assert os.path.isdir(subdir) | |
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291 |
| 36 | 292 # move the file |
| 293 self.package(destination=os.path.join(subdir, filename)) | |
| 28 | 294 finally: |
| 295 shutil.rmtree(tempdir) | |
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296 |
| 36 | 297 def pypi_path(self): |
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298 """ |
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299 returns subpath 2-tuple appropriate for pypi path structure: |
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300 http://k0s.org/portfolio/pypi.html |
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301 """ |
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302 info = self.info() |
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303 |
| 36 | 304 # determine the extension |
| 305 extension = self.extension() | |
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306 |
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307 # get the filename destination |
| 36 | 308 name = info['Name'] |
| 309 version = info['Version'] | |
| 310 filename = '%s-%s%s' % (name, version, extension) | |
| 311 return name, filename |