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 = "0.6c11"
  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-0.6c10-py2.3.egg': 'ce1e2ab5d3a0256456d9fc13800a7090',
  32     'setuptools-0.6c10-py2.4.egg': '57d6d9d6e9b80772c59a53a8433a5dd4',
  33     'setuptools-0.6c10-py2.5.egg': 'de46ac8b1c97c895572e5e8596aeb8c7',
  34     'setuptools-0.6c10-py2.6.egg': '58ea40aef06da02ce641495523a0b7f5',
  35     'setuptools-0.6c11-py2.3.egg': '2baeac6e13d414a9d28e7ba5b5a596de',
  36     'setuptools-0.6c11-py2.4.egg': 'bd639f9b0eac4c42497034dec2ec0c2b',
  37     'setuptools-0.6c11-py2.5.egg': '64c94f3bf7a72a13ec83e0b24f2749b2',
  38     'setuptools-0.6c11-py2.6.egg': 'bfa92100bd772d5a213eedd356d64086',
  39     'setuptools-0.6c2-py2.3.egg': 'f0064bf6aa2b7d0f3ba0b43f20817c27',
  40     'setuptools-0.6c2-py2.4.egg': '616192eec35f47e8ea16cd6a122b7277',
  41     'setuptools-0.6c3-py2.3.egg': 'f181fa125dfe85a259c9cd6f1d7b78fa',
  42     'setuptools-0.6c3-py2.4.egg': 'e0ed74682c998bfb73bf803a50e7b71e',
  43     'setuptools-0.6c3-py2.5.egg': 'abef16fdd61955514841c7c6bd98965e',
  44     'setuptools-0.6c4-py2.3.egg': 'b0b9131acab32022bfac7f44c5d7971f',
  45     'setuptools-0.6c4-py2.4.egg': '2a1f9656d4fbf3c97bf946c0a124e6e2',
  46     'setuptools-0.6c4-py2.5.egg': '8f5a052e32cdb9c72bcf4b5526f28afc',
  47     'setuptools-0.6c5-py2.3.egg': 'ee9fd80965da04f2f3e6b3576e9d8167',
  48     'setuptools-0.6c5-py2.4.egg': 'afe2adf1c01701ee841761f5bcd8aa64',
  49     'setuptools-0.6c5-py2.5.egg': 'a8d3f61494ccaa8714dfed37bccd3d5d',
  50     'setuptools-0.6c6-py2.3.egg': '35686b78116a668847237b69d549ec20',
  51     'setuptools-0.6c6-py2.4.egg': '3c56af57be3225019260a644430065ab',
  52     'setuptools-0.6c6-py2.5.egg': 'b2f8a7520709a5b34f80946de5f02f53',
  53     'setuptools-0.6c7-py2.3.egg': '209fdf9adc3a615e5115b725658e13e2',
  54     'setuptools-0.6c7-py2.4.egg': '5a8f954807d46a0fb67cf1f26c55a82e',
  55     'setuptools-0.6c7-py2.5.egg': '45d2ad28f9750e7434111fde831e8372',
  56     'setuptools-0.6c8-py2.3.egg': '50759d29b349db8cfd807ba8303f1902',
  57     'setuptools-0.6c8-py2.4.egg': 'cba38d74f7d483c06e9daa6070cce6de',
  58     'setuptools-0.6c8-py2.5.egg': '1721747ee329dc150590a58b3e1ac95b',
  59     'setuptools-0.6c9-py2.3.egg': 'a83c4020414807b496e4cfbe08507c03',
  60     'setuptools-0.6c9-py2.4.egg': '260a2be2e5388d66bdaee06abec6342a',
  61     'setuptools-0.6c9-py2.5.egg': 'fe67c3e5a17b12c0e7c541b7ea43a8e6',
  62     'setuptools-0.6c9-py2.6.egg': 'ca37b1ff16fa2ede6e19383e7b59245a',
  63 }
  64
  65 import sys, os
  66 try: from hashlib import md5
  67 except ImportError: from md5 import md5
  68
  69 def _validate_md5(egg_name, data):
  70     if egg_name in md5_data:
  71         digest = md5(data).hexdigest()
  72         if digest != md5_data[egg_name]:
  73             print >>sys.stderr, (
  74                 "md5 validation of %s failed!  (Possible download problem?)"
  75                 % egg_name
  76             )
  77             sys.exit(2)
  78     return data
  79
  80 def use_setuptools(
  81     version=DEFAULT_VERSION, download_base=DEFAULT_URL, to_dir=os.curdir,
  82     download_delay=15
  83 ):
  84     """Automatically find/download setuptools and make it available on sys.path
  85
  86     `version` should be a valid setuptools version number that is available
  87     as an egg for download under the `download_base` URL (which should end with
  88     a '/').  `to_dir` is the directory where setuptools will be downloaded, if
  89     it is not already available.  If `download_delay` is specified, it should
  90     be the number of seconds that will be paused before initiating a download,
  91     should one be required.  If an older version of setuptools is installed,
  92     this routine will print a message to ``sys.stderr`` and raise SystemExit in
  93     an attempt to abort the calling script.
  94     """
  95     was_imported = 'pkg_resources' in sys.modules or 'setuptools' in sys.modules
  96     def do_download():
  97         egg = download_setuptools(version, download_base, to_dir, download_delay)
  98         sys.path.insert(0, egg)
  99         import setuptools; setuptools.bootstrap_install_from = egg
 100     try:
 101         import pkg_resources
 102     except ImportError:
 103         return do_download()
 104     try:
 105         pkg_resources.require("setuptools>="+version); return
 106     except pkg_resources.VersionConflict, e:
 107         if was_imported:
 108             print >>sys.stderr, (
 109             "The required version of setuptools (>=%s) is not available, and\n"
 110             "can't be installed while this script is running. Please install\n"
 111             " a more recent version first, using 'easy_install -U setuptools'."
 112             "\n\n(Currently using %r)"
 113             ) % (version, e.args[0])
 114             sys.exit(2)
 115         else:
 116             del pkg_resources, sys.modules['pkg_resources']    # reload ok
 117             return do_download()
 118     except pkg_resources.DistributionNotFound:
 119         return do_download()
 120
 121 def download_setuptools(
 122     version=DEFAULT_VERSION, download_base=DEFAULT_URL, to_dir=os.curdir,
 123     delay = 15
 124 ):
 125     """Download setuptools from a specified location and return its filename
 126
 127     `version` should be a valid setuptools version number that is available
 128     as an egg for download under the `download_base` URL (which should end
 129     with a '/'). `to_dir` is the directory where the egg will be downloaded.
 130     `delay` is the number of seconds to pause before an actual download attempt.
 131     """
 132     import urllib2, shutil
 133     egg_name = "setuptools-%s-py%s.egg" % (version,sys.version[:3])
 134     url = download_base + egg_name
 135     saveto = os.path.join(to_dir, egg_name)
 136     src = dst = None
 137     if not os.path.exists(saveto):  # Avoid repeated downloads
 138         try:
 139             from distutils import log
 140             if delay:
 141                 log.warn("""
 142 ---------------------------------------------------------------------------
 143 This script requires setuptools version %s to run (even to display
 144 help).  I will attempt to download it for you (from
 145 %s), but
 146 you may need to enable firewall access for this script first.
 147 I will start the download in %d seconds.
 148
 149 (Note: if this machine does not have network access, please obtain the file
 150
 151    %s
 152
 153 and place it in this directory before rerunning this script.)
 154 ---------------------------------------------------------------------------""",
 155                     version, download_base, delay, url
 156                 ); from time import sleep; sleep(delay)
 157             log.warn("Downloading %s", url)
 158             src = urllib2.urlopen(url)
 159             # Read/write all in one block, so we don't create a corrupt file
 160             # if the download is interrupted.
 161             data = _validate_md5(egg_name, src.read())
 162             dst = open(saveto,"wb"); dst.write(data)
 163         finally:
 164             if src: src.close()
 165             if dst: dst.close()
 166     return os.path.realpath(saveto)
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 202
 203 def main(argv, version=DEFAULT_VERSION):
 204     """Install or upgrade setuptools and EasyInstall"""
 205     try:
 206         import setuptools
 207     except ImportError:
 208         egg = None
 209         try:
 210             egg = download_setuptools(version, delay=0)
 211             sys.path.insert(0,egg)
 212             from setuptools.command.easy_install import main
 213             return main(list(argv)+[egg])   # we're done here
 214         finally:
 215             if egg and os.path.exists(egg):
 216                 os.unlink(egg)
 217     else:
 218         if setuptools.__version__ == '0.0.1':
 219             print >>sys.stderr, (
 220             "You have an obsolete version of setuptools installed.  Please\n"
 221             "remove it from your system entirely before rerunning this script."
 222             )
 223             sys.exit(2)
 224
 225     req = "setuptools>="+version
 226     import pkg_resources
 227     try:
 228         pkg_resources.require(req)
 229     except pkg_resources.VersionConflict:
 230         try:
 231             from setuptools.command.easy_install import main
 232         except ImportError:
 233             from easy_install import main
 234         main(list(argv)+[download_setuptools(delay=0)])
 235         sys.exit(0) # try to force an exit
 236     else:
 237         if argv:
 238             from setuptools.command.easy_install import main
 239             main(argv)
 240         else:
 241             print "Setuptools version",version,"or greater has been installed."
 242             print '(Run "ez_setup.py -U setuptools" to reinstall or upgrade.)'
 243
 244 def update_md5(filenames):
 245     """Update our built-in md5 registry"""
 246
 247     import re
 248
 249     for name in filenames:
 250         base = os.path.basename(name)
 251         f = open(name,'rb')
 252         md5_data[base] = md5(f.read()).hexdigest()
 253         f.close()
 254
 255     data = ["    %r: %r,\n" % it for it in md5_data.items()]
 256     data.sort()
 257     repl = "".join(data)
 258
 259     import inspect
 260     srcfile = inspect.getsourcefile(sys.modules[__name__])
 261     f = open(srcfile, 'rb'); src = f.read(); f.close()
 262
 263     match = re.search("\nmd5_data = {\n([^}]+)}", src)
 264     if not match:
 265         print >>sys.stderr, "Internal error!"
 266         sys.exit(2)
 267
 268     src = src[:match.start(1)] + repl + src[match.end(1):]
 269     f = open(srcfile,'w')
 270     f.write(src)
 271     f.close()
 272
 273
 274 if __name__=='__main__':
 275     if len(sys.argv)>2 and sys.argv[1]=='--md5update':
 276         update_md5(sys.argv[2:])
 277     else:
 278         main(sys.argv[1:])
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