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general python script to let the buildout create required directories

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commit 4ab0c80ccc28abedc1aec519f412099a984690c9 1 parent ba7456e
Oğuz Yarımtepe authored April 24, 2012

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  1. 262  bootstrap.py
262  bootstrap.py
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+##############################################################################
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+#
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+# Copyright (c) 2006 Zope Foundation and Contributors.
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+# All Rights Reserved.
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+#
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+# This software is subject to the provisions of the Zope Public License,
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+# Version 2.1 (ZPL).  A copy of the ZPL should accompany this distribution.
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+# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
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+# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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+# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
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+# FOR A PARTICULAR PURPOSE.
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+#
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+##############################################################################
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+"""Bootstrap a buildout-based project
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+
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+Simply run this script in a directory containing a buildout.cfg.
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+The script accepts buildout command-line options, so you can
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+use the -c option to specify an alternate configuration file.
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+"""
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+
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+import os, shutil, sys, tempfile, urllib, urllib2, subprocess
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+from optparse import OptionParser
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+
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+if sys.platform == 'win32':
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+    def quote(c):
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+        if ' ' in c:
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+            return '"%s"' % c  # work around spawn lamosity on windows
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+        else:
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+            return c
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+else:
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+    quote = str
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+
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+# See zc.buildout.easy_install._has_broken_dash_S for motivation and comments.
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+stdout, stderr = subprocess.Popen(
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+    [sys.executable, '-Sc',
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+     'try:\n'
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+     '    import ConfigParser\n'
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+     'except ImportError:\n'
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+     '    print 1\n'
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+     'else:\n'
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+     '    print 0\n'],
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+    stdout=subprocess.PIPE, stderr=subprocess.PIPE).communicate()
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+has_broken_dash_S = bool(int(stdout.strip()))
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+
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+# In order to be more robust in the face of system Pythons, we want to
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+# run without site-packages loaded.  This is somewhat tricky, in
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+# particular because Python 2.6's distutils imports site, so starting
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+# with the -S flag is not sufficient.  However, we'll start with that:
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+if not has_broken_dash_S and 'site' in sys.modules:
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+    # We will restart with python -S.
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+    args = sys.argv[:]
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+    args[0:0] = [sys.executable, '-S']
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+    args = map(quote, args)
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+    os.execv(sys.executable, args)
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+# Now we are running with -S.  We'll get the clean sys.path, import site
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+# because distutils will do it later, and then reset the path and clean
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+# out any namespace packages from site-packages that might have been
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+# loaded by .pth files.
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+clean_path = sys.path[:]
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+import site  # imported because of its side effects
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+sys.path[:] = clean_path
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+for k, v in sys.modules.items():
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+    if k in ('setuptools', 'pkg_resources') or (
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+        hasattr(v, '__path__') and
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+        len(v.__path__) == 1 and
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+        not os.path.exists(os.path.join(v.__path__[0], '__init__.py'))):
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+        # This is a namespace package.  Remove it.
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+        sys.modules.pop(k)
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+
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+is_jython = sys.platform.startswith('java')
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+
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+setuptools_source = 'http://peak.telecommunity.com/dist/ez_setup.py'
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+distribute_source = 'http://python-distribute.org/distribute_setup.py'
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+
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+
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+# parsing arguments
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+def normalize_to_url(option, opt_str, value, parser):
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+    if value:
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+        if '://' not in value:  # It doesn't smell like a URL.
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+            value = 'file://%s' % (
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+                urllib.pathname2url(
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+                    os.path.abspath(os.path.expanduser(value))),)
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+        if opt_str == '--download-base' and not value.endswith('/'):
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+            # Download base needs a trailing slash to make the world happy.
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+            value += '/'
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+    else:
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+        value = None
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+    name = opt_str[2:].replace('-', '_')
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+    setattr(parser.values, name, value)
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+
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+usage = '''\
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+[DESIRED PYTHON FOR BUILDOUT] bootstrap.py [options]
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+
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+Bootstraps a buildout-based project.
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+
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+Simply run this script in a directory containing a buildout.cfg, using the
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+Python that you want bin/buildout to use.
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+
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+Note that by using --setup-source and --download-base to point to
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+local resources, you can keep this script from going over the network.
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+'''
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+
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+parser = OptionParser(usage=usage)
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+parser.add_option("-v", "--version", dest="version",
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+                          help="use a specific zc.buildout version")
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+parser.add_option("-d", "--distribute",
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+                   action="store_true", dest="use_distribute", default=False,
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+                   help="Use Distribute rather than Setuptools.")
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+parser.add_option("--setup-source", action="callback", dest="setup_source",
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+                  callback=normalize_to_url, nargs=1, type="string",
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+                  help=("Specify a URL or file location for the setup file. "
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+                        "If you use Setuptools, this will default to " +
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+                        setuptools_source + "; if you use Distribute, this "
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+                        "will default to " + distribute_source + "."))
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+parser.add_option("--download-base", action="callback", dest="download_base",
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+                  callback=normalize_to_url, nargs=1, type="string",
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+                  help=("Specify a URL or directory for downloading "
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+                        "zc.buildout and either Setuptools or Distribute. "
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+                        "Defaults to PyPI."))
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+parser.add_option("--eggs",
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+                  help=("Specify a directory for storing eggs.  Defaults to "
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+                        "a temporary directory that is deleted when the "
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+                        "bootstrap script completes."))
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+parser.add_option("-t", "--accept-buildout-test-releases",
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+                  dest='accept_buildout_test_releases',
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+                  action="store_true", default=False,
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+                  help=("Normally, if you do not specify a --version, the "
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+                        "bootstrap script and buildout gets the newest "
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+                        "*final* versions of zc.buildout and its recipes and "
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+                        "extensions for you.  If you use this flag, "
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+                        "bootstrap and buildout will get the newest releases "
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+                        "even if they are alphas or betas."))
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+parser.add_option("-c", None, action="store", dest="config_file",
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+                   help=("Specify the path to the buildout configuration "
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+                         "file to be used."))
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+
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+options, args = parser.parse_args()
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+
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+# if -c was provided, we push it back into args for buildout's main function
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+if options.config_file is not None:
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+    args += ['-c', options.config_file]
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+
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+if options.eggs:
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+    eggs_dir = os.path.abspath(os.path.expanduser(options.eggs))
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+else:
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+    eggs_dir = tempfile.mkdtemp()
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+
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+if options.setup_source is None:
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+    if options.use_distribute:
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+        options.setup_source = distribute_source
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+    else:
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+        options.setup_source = setuptools_source
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+
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+if options.accept_buildout_test_releases:
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+    args.append('buildout:accept-buildout-test-releases=true')
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+args.append('bootstrap')
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+
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+try:
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+    import pkg_resources
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+    import setuptools  # A flag.  Sometimes pkg_resources is installed alone.
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+    if not hasattr(pkg_resources, '_distribute'):
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+        raise ImportError
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+except ImportError:
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+    ez_code = urllib2.urlopen(
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+        options.setup_source).read().replace('\r\n', '\n')
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+    ez = {}
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+    exec ez_code in ez
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+    setup_args = dict(to_dir=eggs_dir, download_delay=0)
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+    if options.download_base:
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+        setup_args['download_base'] = options.download_base
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+    if options.use_distribute:
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+        setup_args['no_fake'] = True
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+    ez['use_setuptools'](**setup_args)
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+    if 'pkg_resources' in sys.modules:
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+        reload(sys.modules['pkg_resources'])
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+    import pkg_resources
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+    # This does not (always?) update the default working set.  We will
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+    # do it.
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+    for path in sys.path:
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+        if path not in pkg_resources.working_set.entries:
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+            pkg_resources.working_set.add_entry(path)
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+
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+cmd = [quote(sys.executable),
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+       '-c',
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+       quote('from setuptools.command.easy_install import main; main()'),
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+       '-mqNxd',
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+       quote(eggs_dir)]
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+
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+if not has_broken_dash_S:
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+    cmd.insert(1, '-S')
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+
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+find_links = options.download_base
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+if not find_links:
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+    find_links = os.environ.get('bootstrap-testing-find-links')
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+if find_links:
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+    cmd.extend(['-f', quote(find_links)])
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+
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+if options.use_distribute:
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+    setup_requirement = 'distribute'
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+else:
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+    setup_requirement = 'setuptools'
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+ws = pkg_resources.working_set
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+setup_requirement_path = ws.find(
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+    pkg_resources.Requirement.parse(setup_requirement)).location
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+env = dict(
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+    os.environ,
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+    PYTHONPATH=setup_requirement_path)
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+
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+requirement = 'zc.buildout'
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+version = options.version
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+if version is None and not options.accept_buildout_test_releases:
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+    # Figure out the most recent final version of zc.buildout.
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+    import setuptools.package_index
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+    _final_parts = '*final-', '*final'
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+
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+    def _final_version(parsed_version):
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+        for part in parsed_version:
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+            if (part[:1] == '*') and (part not in _final_parts):
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+                return False
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+        return True
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+    index = setuptools.package_index.PackageIndex(
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+        search_path=[setup_requirement_path])
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+    if find_links:
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+        index.add_find_links((find_links,))
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+    req = pkg_resources.Requirement.parse(requirement)
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+    if index.obtain(req) is not None:
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+        best = []
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+        bestv = None
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+        for dist in index[req.project_name]:
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+            distv = dist.parsed_version
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+            if _final_version(distv):
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+                if bestv is None or distv > bestv:
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+                    best = [dist]
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+                    bestv = distv
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+                elif distv == bestv:
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+                    best.append(dist)
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+        if best:
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+            best.sort()
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+            version = best[-1].version
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+if version:
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+    requirement = '=='.join((requirement, version))
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+cmd.append(requirement)
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+
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+if is_jython:
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+    import subprocess
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+    exitcode = subprocess.Popen(cmd, env=env).wait()
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+else:  # Windows prefers this, apparently; otherwise we would prefer subprocess
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+    exitcode = os.spawnle(*([os.P_WAIT, sys.executable] + cmd + [env]))
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+if exitcode != 0:
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+    sys.stdout.flush()
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+    sys.stderr.flush()
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+    print ("An error occurred when trying to install zc.buildout. "
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+           "Look above this message for any errors that "
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+           "were output by easy_install.")
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+    sys.exit(exitcode)
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+
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+ws.add_entry(eggs_dir)
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+ws.require(requirement)
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+import zc.buildout.buildout
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+zc.buildout.buildout.main(args)
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+if not options.eggs:  # clean up temporary egg directory
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+    shutil.rmtree(eggs_dir)

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