Mercurial > hg > PaInt
annotate paint/package.py @ 33:5efb61fde8aa
improved docstring
| author | Jeff Hammel <jhammel@mozilla.com> |
|---|---|
| date | Fri, 30 Mar 2012 13:43:23 -0700 |
| parents | f2e31ac03bb3 |
| children | acb2f4896291 |
| rev | line source |
|---|---|
| 4 | 1 """ |
| 2 package model for python PAckage INTrospection | |
| 3 """ | |
| 4 | |
| 7 | 5 import os |
| 28 | 6 import pip |
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7 import pypi |
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8 import shutil |
| 19 | 9 import subprocess |
| 10 import sys | |
| 7 | 11 import tarfile |
| 5 | 12 import tempfile |
| 7 | 13 import urllib2 |
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14 import urlparse |
| 7 | 15 import utils |
| 5 | 16 |
| 19 | 17 try: |
| 18 from subprocess import check_call as call | |
| 19 except ImportError: | |
| 20 from subporcess import call | |
| 21 | |
| 10 | 22 __all__ = ['Package'] |
| 23 | |
| 4 | 24 class Package(object): |
| 33 | 25 """ |
| 26 class for python package introspection. | |
| 27 constructor takes the package 'src' | |
| 28 """ | |
| 4 | 29 |
| 30 def __init__(self, src): | |
| 31 self.src = src | |
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32 |
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33 # ephemeral data |
| 5 | 34 self._tmppath = None |
| 28 | 35 self._egg_info_path = None |
| 33 | 36 self._build_path = None |
| 5 | 37 |
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38 # TODO: list of temporary files/directories to be deleted |
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39 |
| 5 | 40 def path(self): |
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41 """filesystem path to package directory""" |
| 7 | 42 |
| 43 # return cached copy if it exists | |
| 44 if self._tmppath: | |
| 45 return self._tmppath | |
| 46 | |
| 47 # fetch from the web if a URL | |
| 48 tmpfile = None | |
| 49 src = self.src | |
| 5 | 50 if utils.isURL(self.src): |
| 8 | 51 tmpfile = src = self.fetch() |
| 7 | 52 |
| 53 # unpack if an archive | |
| 28 | 54 if self._is_archive(src): |
| 8 | 55 try: |
| 56 self.unpack(src) | |
| 57 finally: | |
| 58 if tmpfile: | |
| 59 os.remove(tmpfile) | |
| 7 | 60 return self._tmppath |
| 61 | |
| 5 | 62 return self.src |
| 63 | |
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64 def fetch(self, filename=None): |
| 8 | 65 """fetch from remote source to a temporary file""" |
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66 if filename is None: |
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67 fd, filename = tempfile.mkstemp() |
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68 os.close(fd) |
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69 fp = file(filename, 'w') |
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70 resource = urllib2.urlopen(self.src) |
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71 fp.write(resource.read()) |
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72 fp.close() |
| 7 | 73 return filename |
| 74 | |
| 75 def unpack(self, archive): | |
| 76 """unpack the archive to a temporary destination""" | |
| 77 # TODO: should handle zipfile additionally at least | |
| 78 # Ideally, this would be pluggable, etc | |
| 8 | 79 assert tarfile.is_tarfile(archive), "%s is not an archive" % self.src |
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80 tf = tarfile.TarFile.open(archive) |
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81 self._tmppath = tempfile.mkdtemp() |
| 19 | 82 members = tf.getmembers() |
| 83 | |
| 84 # cut off the top level directory | |
| 85 assert not [i for i in members if not os.path.sep in i.name] | |
| 86 tld = set() | |
| 87 for member in members: | |
| 88 directory, member.name = member.name.split(os.path.sep, 1) | |
| 89 tld.add(directory) | |
| 90 assert len(tld) == 1 | |
| 91 | |
| 92 # extract | |
| 93 for member in members: | |
| 94 tf.extract(member, path=self._tmppath) | |
| 95 tf.close() | |
| 7 | 96 |
| 28 | 97 def _is_archive(self, path): |
| 7 | 98 """returns if the filesystem path is an archive""" |
| 99 # TODO: should handle zipfile additionally at least | |
| 100 # Ideally, this would be pluggable, etc | |
| 101 return tarfile.is_tarfile(path) | |
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102 |
| 28 | 103 def _cleanup(self): |
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104 if self._tmppath: |
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105 shutil.rmtree(self._tmppath) |
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106 self._tmppath = None |
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107 |
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108 # __del__ = cleanup |
| 11 | 109 |
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110 ### python-package-specific functionality |
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111 |
| 28 | 112 def _egg_info(self): |
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113 """build the egg_info directory""" |
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114 |
| 28 | 115 if self._egg_info_path: |
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116 # return cached copy |
| 28 | 117 return self._egg_info_path |
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118 |
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119 directory = self.path() |
| 16 | 120 setup_py = os.path.join(directory, 'setup.py') |
| 121 if not os.path.exists(setup_py): | |
| 17 | 122 raise AssertionError("%s does not exist" % setup_py) |
| 11 | 123 |
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124 # setup the egg info |
| 19 | 125 call([sys.executable, 'setup.py', 'egg_info'], cwd=directory, stdout=subprocess.PIPE) |
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126 |
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127 # get the .egg-info directory |
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128 egg_info = [i for i in os.listdir(directory) |
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129 if i.endswith('.egg-info')] |
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130 assert len(egg_info) == 1, 'Expected one .egg-info directory in %s, got: %s' % (directory, egg_info) |
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131 egg_info = os.path.join(directory, egg_info[0]) |
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132 assert os.path.isdir(egg_info), "%s is not a directory" % egg_info |
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133 |
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134 # cache it |
| 28 | 135 self._egg_info_path = egg_info |
| 136 return self._egg_info_path | |
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137 |
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138 def info(self): |
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139 """return info dictionary for package""" |
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140 # could use pkginfo |
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141 |
| 28 | 142 egg_info = self._egg_info() |
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143 |
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144 # read the package information |
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145 pkg_info = os.path.join(egg_info, 'PKG-INFO') |
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146 info_dict = {} |
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147 for line in file(pkg_info).readlines(): |
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148 if not line or line[0].isspace(): |
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149 continue # XXX neglects description |
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150 assert ':' in line |
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151 key, value = [i.strip() for i in line.split(':', 1)] |
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152 info_dict[key] = value |
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153 |
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154 # return the information |
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155 return info_dict |
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156 |
| 11 | 157 def dependencies(self): |
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158 """return the dependencies""" |
| 32 | 159 # TODO: should probably have a more detailed dict: |
| 160 # {'mozinfo': {'version': '>= 0.2', | |
| 161 # 'url': 'http://something.com/'}} | |
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162 |
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163 # get the egg_info directory |
| 28 | 164 egg_info = self._egg_info() |
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165 |
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166 # read the dependencies |
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167 requires = os.path.join(egg_info, 'requires.txt') |
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168 if os.path.exists(requires): |
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169 dependencies = [i.strip() for i in file(requires).readlines() if i.strip()] |
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170 else: |
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171 dependencies = [] |
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172 dependencies = dict([(i, None) for i in dependencies]) |
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173 |
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174 # read the dependency links |
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175 dependency_links = os.path.join(egg_info, 'dependency_links.txt') |
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176 if os.path.exists(dependency_links): |
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177 links = [i.strip() for i in file(dependency_links).readlines() if i.strip()] |
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178 for link in links: |
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179 # XXX pretty ghetto |
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180 assert '#egg=' in link |
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181 url, dep = link.split('#egg=', 1) |
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182 if dep in dependencies: |
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183 dependencies[dep] = link |
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184 |
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185 return dependencies |
| 24 | 186 |
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187 def extension(self): |
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188 """filename extension""" |
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189 |
| 33 | 190 def repackage(self, destination): |
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191 """ |
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192 repackage the package to ensure its actually in the right form |
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193 """ |
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194 |
| 33 | 195 if self._build_path: |
| 196 return self._build_path | |
| 197 | |
| 24 | 198 def download(self, directory): |
| 199 """download a package and all its dependencies using pip""" | |
| 28 | 200 if not os.path.exists(directory): |
| 201 os.makedirs(directory) | |
| 202 assert os.path.isdir(directory) | |
| 203 pip.main(['install', '--download', directory, self.src]) | |
| 204 | |
| 205 def pypi(self, directory): | |
| 206 """ | |
| 207 download packages for a pypi directory structure | |
| 208 http://k0s.org/portfolio/pypi.html | |
| 209 """ | |
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210 if not os.path.exists(directory): |
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211 os.makedirs(directory) |
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212 assert os.path.isdir(directory) |
| 28 | 213 tempdir = tempfile.mkdtemp() |
| 214 try: | |
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215 self.download(tempdir) |
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216 for package in os.listdir(tempdir): |
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217 |
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218 # full path |
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219 src = os.path.join(tempdir, package) |
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220 |
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221 package = Package(src) |
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222 |
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223 # # get destination dirname, filename |
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224 # try: |
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225 # dirname, filename = pypi.pypi_path(src) |
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226 # except ValueError: |
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227 # # PKG-INFO not found |
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228 # pass # TODO |
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229 |
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230 # # make the directory if it doesn't exist |
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231 # subdir = os.path.join(directory, dirname) |
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232 # if not os.path.exists(subdir): |
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233 # os.makedirs(subdir) |
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234 # assert os.path.isdir(subdir) |
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235 |
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236 # # move the file |
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237 # shutil.move(src, os.path.join(subdir, filename)) |
| 28 | 238 finally: |
| 239 shutil.rmtree(tempdir) | |
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240 |
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241 def pypi_path(self, path): |
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242 """ |
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243 returns subpath 2-tuple appropriate for pypi path structure: |
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244 http://k0s.org/portfolio/pypi.html |
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245 """ |
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246 info = self.info() |
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247 # sdist = pkginfo.sdist.SDist(path) |
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248 |
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249 # determine the extension (XXX hacky) |
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250 extensions = ('.tar.gz', '.zip', '.tar.bz2') |
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251 for ext in extensions: |
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252 import pdb; pdb.set_trace() |
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253 if sdist.filename.endswith(ext): |
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254 break |
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255 else: |
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256 raise Exception("Extension %s not found: %s" % (extensions, sdist.filename)) |
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257 |
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258 # get the filename destination |
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259 filename = '%s-%s%s' % (info['name'], ext) |
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260 return sdist.name, filename |