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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
Adrian Holovaty authored July 15, 2005

Showing 1 changed file with 164 additions and 0 deletions. Show diff stats Hide diff stats

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

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