ez_setup.py

   1 #!python
   2 """Bootstrap setuptools installation
   3
   4 If you want to use setuptools in your package's setup.py, just include this
   5 file in the same directory with it, and add this to the top of your setup.py::
   6
   7     from ez_setup import use_setuptools
   8     use_setuptools()
   9
  10 If you want to require a specific version of setuptools, set a download
  11 mirror, or use an alternate download directory, you can do so by supplying
  12 the appropriate options to ``use_setuptools()``.
  13
  14 This file can also be run as a script to install or upgrade setuptools.
  15 """
  16 import sys
  17 DEFAULT_VERSION = "0.6c9"
  18 DEFAULT_URL     = "http://pypi.python.org/packages/%s/s/setuptools/" % sys.version[:3]
  19
  20 md5_data = {
  21     'setuptools-0.6b1-py2.3.egg': '8822caf901250d848b996b7f25c6e6ca',
  22     'setuptools-0.6b1-py2.4.egg': 'b79a8a403e4502fbb85ee3f1941735cb',
  23     'setuptools-0.6b2-py2.3.egg': '5657759d8a6d8fc44070a9d07272d99b',
  24     'setuptools-0.6b2-py2.4.egg': '4996a8d169d2be661fa32a6e52e4f82a',
  25     'setuptools-0.6b3-py2.3.egg': 'bb31c0fc7399a63579975cad9f5a0618',
  26     'setuptools-0.6b3-py2.4.egg': '38a8c6b3d6ecd22247f179f7da669fac',
  27     'setuptools-0.6b4-py2.3.egg': '62045a24ed4e1ebc77fe039aa4e6f7e5',
  28     'setuptools-0.6b4-py2.4.egg': '4cb2a185d228dacffb2d17f103b3b1c4',
  29     'setuptools-0.6c1-py2.3.egg': 'b3f2b5539d65cb7f74ad79127f1a908c',
  30     'setuptools-0.6c1-py2.4.egg': 'b45adeda0667d2d2ffe14009364f2a4b',
  31     'setuptools-0.6c2-py2.3.egg': 'f0064bf6aa2b7d0f3ba0b43f20817c27',
  32     'setuptools-0.6c2-py2.4.egg': '616192eec35f47e8ea16cd6a122b7277',
  33     'setuptools-0.6c3-py2.3.egg': 'f181fa125dfe85a259c9cd6f1d7b78fa',
  34     'setuptools-0.6c3-py2.4.egg': 'e0ed74682c998bfb73bf803a50e7b71e',
  35     'setuptools-0.6c3-py2.5.egg': 'abef16fdd61955514841c7c6bd98965e',
  36     'setuptools-0.6c4-py2.3.egg': 'b0b9131acab32022bfac7f44c5d7971f',
  37     'setuptools-0.6c4-py2.4.egg': '2a1f9656d4fbf3c97bf946c0a124e6e2',
  38     'setuptools-0.6c4-py2.5.egg': '8f5a052e32cdb9c72bcf4b5526f28afc',
  39     'setuptools-0.6c5-py2.3.egg': 'ee9fd80965da04f2f3e6b3576e9d8167',
  40     'setuptools-0.6c5-py2.4.egg': 'afe2adf1c01701ee841761f5bcd8aa64',
  41     'setuptools-0.6c5-py2.5.egg': 'a8d3f61494ccaa8714dfed37bccd3d5d',
  42     'setuptools-0.6c6-py2.3.egg': '35686b78116a668847237b69d549ec20',
  43     'setuptools-0.6c6-py2.4.egg': '3c56af57be3225019260a644430065ab',
  44     'setuptools-0.6c6-py2.5.egg': 'b2f8a7520709a5b34f80946de5f02f53',
  45     'setuptools-0.6c7-py2.3.egg': '209fdf9adc3a615e5115b725658e13e2',
  46     'setuptools-0.6c7-py2.4.egg': '5a8f954807d46a0fb67cf1f26c55a82e',
  47     'setuptools-0.6c7-py2.5.egg': '45d2ad28f9750e7434111fde831e8372',
  48     'setuptools-0.6c8-py2.3.egg': '50759d29b349db8cfd807ba8303f1902',
  49     'setuptools-0.6c8-py2.4.egg': 'cba38d74f7d483c06e9daa6070cce6de',
  50     'setuptools-0.6c8-py2.5.egg': '1721747ee329dc150590a58b3e1ac95b',
  51     'setuptools-0.6c9-py2.3.egg': 'a83c4020414807b496e4cfbe08507c03',
  52     'setuptools-0.6c9-py2.4.egg': '260a2be2e5388d66bdaee06abec6342a',
  53     'setuptools-0.6c9-py2.5.egg': 'fe67c3e5a17b12c0e7c541b7ea43a8e6',
  54     'setuptools-0.6c9-py2.6.egg': 'ca37b1ff16fa2ede6e19383e7b59245a',
  55 }
  56
  57 import sys, os
  58 try: from hashlib import md5
  59 except ImportError: from md5 import md5
  60
  61 def _validate_md5(egg_name, data):
  62     if egg_name in md5_data:
  63         digest = md5(data).hexdigest()
  64         if digest != md5_data[egg_name]:
  65             print >>sys.stderr, (
  66                 "md5 validation of %s failed!  (Possible download problem?)"
  67                 % egg_name
  68             )
  69             sys.exit(2)
  70     return data
  71
  72 def use_setuptools(
  73     version=DEFAULT_VERSION, download_base=DEFAULT_URL, to_dir=os.curdir,
  74     download_delay=15
  75 ):
  76     """Automatically find/download setuptools and make it available on sys.path
  77
  78     `version` should be a valid setuptools version number that is available
  79     as an egg for download under the `download_base` URL (which should end with
  80     a '/').  `to_dir` is the directory where setuptools will be downloaded, if
  81     it is not already available.  If `download_delay` is specified, it should
  82     be the number of seconds that will be paused before initiating a download,
  83     should one be required.  If an older version of setuptools is installed,
  84     this routine will print a message to ``sys.stderr`` and raise SystemExit in
  85     an attempt to abort the calling script.
  86     """
  87     was_imported = 'pkg_resources' in sys.modules or 'setuptools' in sys.modules
  88     def do_download():
  89         egg = download_setuptools(version, download_base, to_dir, download_delay)
  90         sys.path.insert(0, egg)
  91         import setuptools; setuptools.bootstrap_install_from = egg
  92     try:
  93         import pkg_resources
  94     except ImportError:
  95         return do_download()
  96     try:
  97         pkg_resources.require("setuptools>="+version); return
  98     except pkg_resources.VersionConflict, e:
  99         if was_imported:
 100             print >>sys.stderr, (
 101             "The required version of setuptools (>=%s) is not available, and\n"
 102             "can't be installed while this script is running. Please install\n"
 103             " a more recent version first, using 'easy_install -U setuptools'."
 104             "\n\n(Currently using %r)"
 105             ) % (version, e.args[0])
 106             sys.exit(2)
 107         else:
 108             del pkg_resources, sys.modules['pkg_resources']    # reload ok
 109             return do_download()
 110     except pkg_resources.DistributionNotFound:
 111         return do_download()
 112
 113 def download_setuptools(
 114     version=DEFAULT_VERSION, download_base=DEFAULT_URL, to_dir=os.curdir,
 115     delay = 15
 116 ):
 117     """Download setuptools from a specified location and return its filename
 118
 119     `version` should be a valid setuptools version number that is available
 120     as an egg for download under the `download_base` URL (which should end
 121     with a '/'). `to_dir` is the directory where the egg will be downloaded.
 122     `delay` is the number of seconds to pause before an actual download attempt.
 123     """
 124     import urllib2, shutil
 125     egg_name = "setuptools-%s-py%s.egg" % (version,sys.version[:3])
 126     url = download_base + egg_name
 127     saveto = os.path.join(to_dir, egg_name)
 128     src = dst = None
 129     if not os.path.exists(saveto):  # Avoid repeated downloads
 130         try:
 131             from distutils import log
 132             if delay:
 133                 log.warn("""
 134 ---------------------------------------------------------------------------
 135 This script requires setuptools version %s to run (even to display
 136 help).  I will attempt to download it for you (from
 137 %s), but
 138 you may need to enable firewall access for this script first.
 139 I will start the download in %d seconds.
 140
 141 (Note: if this machine does not have network access, please obtain the file
 142
 143    %s
 144
 145 and place it in this directory before rerunning this script.)
 146 ---------------------------------------------------------------------------""",
 147                     version, download_base, delay, url
 148                 ); from time import sleep; sleep(delay)
 149             log.warn("Downloading %s", url)
 150             src = urllib2.urlopen(url)
 151             # Read/write all in one block, so we don't create a corrupt file
 152             # if the download is interrupted.
 153             data = _validate_md5(egg_name, src.read())
 154             dst = open(saveto,"wb"); dst.write(data)
 155         finally:
 156             if src: src.close()
 157             if dst: dst.close()
 158     return os.path.realpath(saveto)
 159
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 194
 195 def main(argv, version=DEFAULT_VERSION):
 196     """Install or upgrade setuptools and EasyInstall"""
 197     try:
 198         import setuptools
 199     except ImportError:
 200         egg = None
 201         try:
 202             egg = download_setuptools(version, delay=0)
 203             sys.path.insert(0,egg)
 204             from setuptools.command.easy_install import main
 205             return main(list(argv)+[egg])   # we're done here
 206         finally:
 207             if egg and os.path.exists(egg):
 208                 os.unlink(egg)
 209     else:
 210         if setuptools.__version__ == '0.0.1':
 211             print >>sys.stderr, (
 212             "You have an obsolete version of setuptools installed.  Please\n"
 213             "remove it from your system entirely before rerunning this script."
 214             )
 215             sys.exit(2)
 216
 217     req = "setuptools>="+version
 218     import pkg_resources
 219     try:
 220         pkg_resources.require(req)
 221     except pkg_resources.VersionConflict:
 222         try:
 223             from setuptools.command.easy_install import main
 224         except ImportError:
 225             from easy_install import main
 226         main(list(argv)+[download_setuptools(delay=0)])
 227         sys.exit(0) # try to force an exit
 228     else:
 229         if argv:
 230             from setuptools.command.easy_install import main
 231             main(argv)
 232         else:
 233             print "Setuptools version",version,"or greater has been installed."
 234             print '(Run "ez_setup.py -U setuptools" to reinstall or upgrade.)'
 235
 236 def update_md5(filenames):
 237     """Update our built-in md5 registry"""
 238
 239     import re
 240
 241     for name in filenames:
 242         base = os.path.basename(name)
 243         f = open(name,'rb')
 244         md5_data[base] = md5(f.read()).hexdigest()
 245         f.close()
 246
 247     data = ["    %r: %r,\n" % it for it in md5_data.items()]
 248     data.sort()
 249     repl = "".join(data)
 250
 251     import inspect
 252     srcfile = inspect.getsourcefile(sys.modules[__name__])
 253     f = open(srcfile, 'rb'); src = f.read(); f.close()
 254
 255     match = re.search("\nmd5_data = {\n([^}]+)}", src)
 256     if not match:
 257         print >>sys.stderr, "Internal error!"
 258         sys.exit(2)
 259
 260     src = src[:match.start(1)] + repl + src[match.end(1):]
 261     f = open(srcfile,'w')
 262     f.write(src)
 263     f.close()
 264
 265
 266 if __name__=='__main__':
 267     if len(sys.argv)>2 and sys.argv[1]=='--md5update':
 268         update_md5(sys.argv[2:])
 269     else:
 270         main(sys.argv[1:])
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