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Added ez_setup.py -- companion to [65]

git-svn-id: http://code.djangoproject.com/svn/django/trunk@66 bcc190cf-cafb-0310-a4f2-bffc1f526a37
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commit 05c5dabb8f6a42e37cb2e78c3ac00e787d29eea4 1 parent 775f433
@adrianholovaty adrianholovaty authored
Showing with 164 additions and 0 deletions.
  1. +164 −0 ez_setup.py
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164 ez_setup.py
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+#!python
+"""Bootstrap setuptools installation
+
+If you want to use setuptools in your package's setup.py, just include this
+file in the same directory with it, and add this to the top of your setup.py::
+
+ from ez_setup import use_setuptools
+ use_setuptools()
+
+If you want to require a specific version of setuptools, set a download
+mirror, or use an alternate download directory, you can do so by supplying
+the appropriate options to ``use_setuptools()``.
+
+This file can also be run as a script to install or upgrade setuptools.
+"""
+
+DEFAULT_VERSION = "0.5a12"
+DEFAULT_URL = "http://www.python.org/packages/source/s/setuptools/"
+
+import sys, os
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+def use_setuptools(
+ version=DEFAULT_VERSION, download_base=DEFAULT_URL, to_dir=os.curdir
+):
+ """Automatically find/download setuptools and make it available on sys.path
+
+ `version` should be a valid setuptools version number that is available
+ as an egg for download under the `download_base` URL (which should end with
+ a '/'). `to_dir` is the directory where setuptools will be downloaded, if
+ it is not already available.
+
+ If an older version of setuptools is installed, this will print a message
+ to ``sys.stderr`` and raise SystemExit in an attempt to abort the calling
+ script.
+ """
+ try:
+ import setuptools
+ if setuptools.__version__ == '0.0.1':
+ print >>sys.stderr, (
+ "You have an obsolete version of setuptools installed. Please\n"
+ "remove it from your system entirely before rerunning this script."
+ )
+ sys.exit(2)
+
+ except ImportError:
+ egg = download_setuptools(version, download_base, to_dir)
+ sys.path.insert(0, egg)
+ import setuptools; setuptools.bootstrap_install_from = egg
+
+ import pkg_resources
+ try:
+ pkg_resources.require("setuptools>="+version)
+
+ except pkg_resources.VersionConflict:
+ # XXX could we install in a subprocess here?
+ print >>sys.stderr, (
+ "The required version of setuptools (>=%s) is not available, and\n"
+ "can't be installed while this script is running. Please install\n"
+ " a more recent version first."
+ ) % version
+ sys.exit(2)
+
+def download_setuptools(
+ version=DEFAULT_VERSION, download_base=DEFAULT_URL, to_dir=os.curdir
+):
+ """Download setuptools from a specified location and return its filename
+
+ `version` should be a valid setuptools version number that is available
+ as an egg for download under the `download_base` URL (which should end
+ with a '/'). `to_dir` is the directory where the egg will be downloaded.
+ """
+ import urllib2, shutil
+ egg_name = "setuptools-%s-py%s.egg" % (version,sys.version[:3])
+ url = download_base + egg_name + '.zip' # XXX
+ saveto = os.path.join(to_dir, egg_name)
+ src = dst = None
+
+ if not os.path.exists(saveto): # Avoid repeated downloads
+ try:
+ from distutils import log
+ log.warn("Downloading %s", url)
+ src = urllib2.urlopen(url)
+ # Read/write all in one block, so we don't create a corrupt file
+ # if the download is interrupted.
+ data = src.read()
+ dst = open(saveto,"wb")
+ dst.write(data)
+ finally:
+ if src: src.close()
+ if dst: dst.close()
+
+ return os.path.realpath(saveto)
+
+
+
+
+
+
+
+
+
+
+
+def main(argv, version=DEFAULT_VERSION):
+ """Install or upgrade setuptools and EasyInstall"""
+
+ try:
+ import setuptools
+ except ImportError:
+ import tempfile, shutil
+ tmpdir = tempfile.mkdtemp(prefix="easy_install-")
+ try:
+ egg = download_setuptools(version, to_dir=tmpdir)
+ sys.path.insert(0,egg)
+ from setuptools.command.easy_install import main
+ main(list(argv)+[egg])
+ finally:
+ shutil.rmtree(tmpdir)
+ else:
+ if setuptools.__version__ == '0.0.1':
+ # tell the user to uninstall obsolete version
+ use_setuptools(version)
+
+ req = "setuptools>="+version
+ import pkg_resources
+ try:
+ pkg_resources.require(req)
+ except pkg_resources.VersionConflict:
+ try:
+ from setuptools.command.easy_install import main
+ except ImportError:
+ from easy_install import main
+ main(list(argv)+[download_setuptools()])
+ sys.exit(0) # try to force an exit
+ else:
+ if argv:
+ from setuptools.command.easy_install import main
+ main(argv)
+ else:
+ print "Setuptools version",version,"or greater has been installed."
+ print '(Run "ez_setup.py -U setuptools" to reinstall or upgrade.)'
+if __name__=='__main__':
+ main(sys.argv[1:])
+
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