Python distutils.command.install 模块，install() 实例源码

def get_install_paths(name):
    """
    Return the (distutils) install paths for the named dist.

    A dict with ('purelib', 'platlib', 'headers', 'scripts', 'data') keys.
    """
    paths = {}

    i = get_install_command(name)

    for key in install.SCHEME_KEYS:
        paths[key] = getattr(i, 'install_' + key)

    # pip uses a similar path as an alternative to the system's (read-only)
    # include directory:
    if hasattr(sys, 'real_prefix'):  # virtualenv
        paths['headers'] = os.path.join(sys.prefix,
                                        'include',
                                        'site',
                                        'python' + sys.version[:3],
                                        name)

    return paths

def get_install_paths(name):
    """
    Return the (distutils) install paths for the named dist.

    A dict with ('purelib', 'platlib', 'headers', 'scripts', 'data') keys.
    """
    paths = {}

    i = get_install_command(name)

    for key in install.SCHEME_KEYS:
        paths[key] = getattr(i, 'install_' + key)

    # pip uses a similar path as an alternative to the system's (read-only)
    # include directory:
    if hasattr(sys, 'real_prefix'):  # virtualenv
        paths['headers'] = os.path.join(sys.prefix,
                                        'include',
                                        'site',
                                        'python' + sys.version[:3],
                                        name)

    return paths

def get_install_paths(name):
    """
    Return the (distutils) install paths for the named dist.

    A dict with ('purelib', 'platlib', 'headers', 'scripts', 'data') keys.
    """
    paths = {}

    i = get_install_command(name)

    for key in install.SCHEME_KEYS:
        paths[key] = getattr(i, 'install_' + key)

    # pip uses a similar path as an alternative to the system's (read-only)
    # include directory:
    if hasattr(sys, 'real_prefix'):  # virtualenv
        paths['headers'] = os.path.join(sys.prefix,
                                        'include',
                                        'site',
                                        'python' + sys.version[:3],
                                        name)

    return paths

def get_install_paths(name):
    """
    Return the (distutils) install paths for the named dist.

    A dict with ('purelib', 'platlib', 'headers', 'scripts', 'data') keys.
    """
    paths = {}

    i = get_install_command(name)

    for key in install.SCHEME_KEYS:
        paths[key] = getattr(i, 'install_' + key)

    # pip uses a similar path as an alternative to the system's (read-only)
    # include directory:
    if hasattr(sys, 'real_prefix'):  # virtualenv
        paths['headers'] = os.path.join(sys.prefix,
                                        'include',
                                        'site',
                                        'python' + sys.version[:3],
                                        name)

    return paths

def get_install_paths(name):
    """
    Return the (distutils) install paths for the named dist.

    A dict with ('purelib', 'platlib', 'headers', 'scripts', 'data') keys.
    """
    paths = {}

    i = get_install_command(name)

    for key in install.SCHEME_KEYS:
        paths[key] = getattr(i, 'install_' + key)

    # pip uses a similar path as an alternative to the system's (read-only)
    # include directory:
    if hasattr(sys, 'real_prefix'):  # virtualenv
        paths['headers'] = os.path.join(sys.prefix,
                                        'include',
                                        'site',
                                        'python' + sys.version[:3],
                                        name)

    return paths

def get_install_paths(name):
    """
    Return the (distutils) install paths for the named dist.

    A dict with ('purelib', 'platlib', 'headers', 'scripts', 'data') keys.
    """
    paths = {}

    i = get_install_command(name)

    for key in install.SCHEME_KEYS:
        paths[key] = getattr(i, 'install_' + key)

    # pip uses a similar path as an alternative to the system's (read-only)
    # include directory:
    if hasattr(sys, 'real_prefix'):  # virtualenv
        paths['headers'] = os.path.join(sys.prefix,
                                        'include',
                                        'site',
                                        'python' + sys.version[:3],
                                        name)

    return paths

def get_install_paths(name):
    """
    Return the (distutils) install paths for the named dist.

    A dict with ('purelib', 'platlib', 'headers', 'scripts', 'data') keys.
    """
    paths = {}

    i = get_install_command(name)

    for key in install.SCHEME_KEYS:
        paths[key] = getattr(i, 'install_' + key)

    # pip uses a similar path as an alternative to the system's (read-only)
    # include directory:
    if hasattr(sys, 'real_prefix'):  # virtualenv
        paths['headers'] = os.path.join(sys.prefix,
                                        'include',
                                        'site',
                                        'python' + sys.version[:3],
                                        name)

    return paths

def get_install_paths(name):
    """
    Return the (distutils) install paths for the named dist.

    A dict with ('purelib', 'platlib', 'headers', 'scripts', 'data') keys.
    """
    paths = {}

    i = get_install_command(name)

    for key in install.SCHEME_KEYS:
        paths[key] = getattr(i, 'install_' + key)

    # pip uses a similar path as an alternative to the system's (read-only)
    # include directory:
    if hasattr(sys, 'real_prefix'):  # virtualenv
        paths['headers'] = os.path.join(sys.prefix,
                                        'include',
                                        'site',
                                        'python' + sys.version[:3],
                                        name)

    return paths

def test_finalize_options(self):
        dist = Distribution({'name': 'xx'})
        cmd = install(dist)

        # must supply either prefix/exec-prefix/home or
        # install-base/install-platbase -- not both
        cmd.prefix = 'prefix'
        cmd.install_base = 'base'
        self.assertRaises(DistutilsOptionError, cmd.finalize_options)

        # must supply either home or prefix/exec-prefix -- not both
        cmd.install_base = None
        cmd.home = 'home'
        self.assertRaises(DistutilsOptionError, cmd.finalize_options)

        # can't combine user with prefix/exec_prefix/home or
        # install_(plat)base
        cmd.prefix = None
        cmd.user = 'user'
        self.assertRaises(DistutilsOptionError, cmd.finalize_options)

def get_install_paths(name):
    """
    Return the (distutils) install paths for the named dist.

    A dict with ('purelib', 'platlib', 'headers', 'scripts', 'data') keys.
    """
    paths = {}

    i = get_install_command(name)

    for key in install.SCHEME_KEYS:
        paths[key] = getattr(i, 'install_' + key)

    # pip uses a similar path as an alternative to the system's (read-only)
    # include directory:
    if hasattr(sys, 'real_prefix'):  # virtualenv
        paths['headers'] = os.path.join(sys.prefix,
                                        'include',
                                        'site',
                                        'python' + sys.version[:3],
                                        name)

    return paths

def get_install_paths(name):
    """
    Return the (distutils) install paths for the named dist.

    A dict with ('purelib', 'platlib', 'headers', 'scripts', 'data') keys.
    """
    paths = {}

    i = get_install_command(name)

    for key in install.SCHEME_KEYS:
        paths[key] = getattr(i, 'install_' + key)

    # pip uses a similar path as an alternative to the system's (read-only)
    # include directory:
    if hasattr(sys, 'real_prefix'):  # virtualenv
        paths['headers'] = os.path.join(sys.prefix,
                                        'include',
                                        'site',
                                        'python' + sys.version[:3],
                                        name)

    return paths

def get_install_paths(name):
    """
    Return the (distutils) install paths for the named dist.

    A dict with ('purelib', 'platlib', 'headers', 'scripts', 'data') keys.
    """
    paths = {}

    i = get_install_command(name)

    for key in install.SCHEME_KEYS:
        paths[key] = getattr(i, 'install_' + key)

    # pip uses a similar path as an alternative to the system's (read-only)
    # include directory:
    if hasattr(sys, 'real_prefix'):  # virtualenv
        paths['headers'] = os.path.join(sys.prefix,
                                        'include',
                                        'site',
                                        'python' + sys.version[:3],
                                        name)

    return paths

def get_install_paths(name):
    """
    Return the (distutils) install paths for the named dist.

    A dict with ('purelib', 'platlib', 'headers', 'scripts', 'data') keys.
    """
    paths = {}

    i = get_install_command(name)

    for key in install.SCHEME_KEYS:
        paths[key] = getattr(i, 'install_' + key)

    # pip uses a similar path as an alternative to the system's (read-only)
    # include directory:
    if hasattr(sys, 'real_prefix'):  # virtualenv
        paths['headers'] = os.path.join(sys.prefix,
                                        'include',
                                        'site',
                                        'python' + sys.version[:3],
                                        name)

    return paths

def get_install_paths(name):
    """
    Return the (distutils) install paths for the named dist.

    A dict with ('purelib', 'platlib', 'headers', 'scripts', 'data') keys.
    """
    paths = {}

    i = get_install_command(name)

    for key in install.SCHEME_KEYS:
        paths[key] = getattr(i, 'install_' + key)

    # pip uses a similar path as an alternative to the system's (read-only)
    # include directory:
    if hasattr(sys, 'real_prefix'):  # virtualenv
        paths['headers'] = os.path.join(sys.prefix,
                                        'include',
                                        'site',
                                        'python' + sys.version[:3],
                                        name)

    return paths

def get_install_paths(name):
    """
    Return the (distutils) install paths for the named dist.

    A dict with ('purelib', 'platlib', 'headers', 'scripts', 'data') keys.
    """
    paths = {}

    i = get_install_command(name)

    for key in install.SCHEME_KEYS:
        paths[key] = getattr(i, 'install_' + key)

    # pip uses a similar path as an alternative to the system's (read-only)
    # include directory:
    if hasattr(sys, 'real_prefix'):  # virtualenv
        paths['headers'] = os.path.join(sys.prefix,
                                        'include',
                                        'site',
                                        'python' + sys.version[:3],
                                        name)

    return paths

def get_install_paths(name):
    """
    Return the (distutils) install paths for the named dist.

    A dict with ('purelib', 'platlib', 'headers', 'scripts', 'data') keys.
    """
    paths = {}

    i = get_install_command(name)

    for key in install.SCHEME_KEYS:
        paths[key] = getattr(i, 'install_' + key)

    # pip uses a similar path as an alternative to the system's (read-only)
    # include directory:
    if hasattr(sys, 'real_prefix'):  # virtualenv
        paths['headers'] = os.path.join(sys.prefix,
                                        'include',
                                        'site',
                                        'python' + sys.version[:3],
                                        name)

    return paths

def get_install_paths(name):
    """
    Return the (distutils) install paths for the named dist.

    A dict with ('purelib', 'platlib', 'headers', 'scripts', 'data') keys.
    """
    paths = {}

    i = get_install_command(name)

    for key in install.SCHEME_KEYS:
        paths[key] = getattr(i, 'install_' + key)

    # pip uses a similar path as an alternative to the system's (read-only)
    # include directory:
    if hasattr(sys, 'real_prefix'):  # virtualenv
        paths['headers'] = os.path.join(sys.prefix,
                                        'include',
                                        'site',
                                        'python' + sys.version[:3],
                                        name)

    return paths

def get_install_paths(name):
    """
    Return the (distutils) install paths for the named dist.

    A dict with ('purelib', 'platlib', 'headers', 'scripts', 'data') keys.
    """
    paths = {}

    i = get_install_command(name)

    for key in install.SCHEME_KEYS:
        paths[key] = getattr(i, 'install_' + key)

    # pip uses a similar path as an alternative to the system's (read-only)
    # include directory:
    if hasattr(sys, 'real_prefix'):  # virtualenv
        paths['headers'] = os.path.join(sys.prefix,
                                        'include',
                                        'site',
                                        'python' + sys.version[:3],
                                        name)

    return paths

def get_install_paths(name):
    """
    Return the (distutils) install paths for the named dist.

    A dict with ('purelib', 'platlib', 'headers', 'scripts', 'data') keys.
    """
    paths = {}

    i = get_install_command(name)

    for key in install.SCHEME_KEYS:
        paths[key] = getattr(i, 'install_' + key)

    # pip uses a similar path as an alternative to the system's (read-only)
    # include directory:
    if hasattr(sys, 'real_prefix'):  # virtualenv
        paths['headers'] = os.path.join(sys.prefix,
                                        'include',
                                        'site',
                                        'python' + sys.version[:3],
                                        name)

    return paths

def get_install_paths(name):
    """
    Return the (distutils) install paths for the named dist.

    A dict with ('purelib', 'platlib', 'headers', 'scripts', 'data') keys.
    """
    paths = {}

    i = get_install_command(name)

    for key in install.SCHEME_KEYS:
        paths[key] = getattr(i, 'install_' + key)

    # pip uses a similar path as an alternative to the system's (read-only)
    # include directory:
    if hasattr(sys, 'real_prefix'):  # virtualenv
        paths['headers'] = os.path.join(sys.prefix,
                                        'include',
                                        'site',
                                        'python' + sys.version[:3],
                                        name)

    return paths

def get_install_paths(name):
    """
    Return the (distutils) install paths for the named dist.

    A dict with ('purelib', 'platlib', 'headers', 'scripts', 'data') keys.
    """
    paths = {}

    i = get_install_command(name)

    for key in install.SCHEME_KEYS:
        paths[key] = getattr(i, 'install_' + key)

    # pip uses a similar path as an alternative to the system's (read-only)
    # include directory:
    if hasattr(sys, 'real_prefix'):  # virtualenv
        paths['headers'] = os.path.join(sys.prefix,
                                        'include',
                                        'site',
                                        'python' + sys.version[:3],
                                        name)

    return paths

def get_install_paths(name):
    """
    Return the (distutils) install paths for the named dist.

    A dict with ('purelib', 'platlib', 'headers', 'scripts', 'data') keys.
    """
    paths = {}

    i = get_install_command(name)

    for key in install.SCHEME_KEYS:
        paths[key] = getattr(i, 'install_' + key)

    # pip uses a similar path as an alternative to the system's (read-only)
    # include directory:
    if hasattr(sys, 'real_prefix'):  # virtualenv
        paths['headers'] = os.path.join(sys.prefix,
                                        'include',
                                        'site',
                                        'python' + sys.version[:3],
                                        name)

    return paths

def get_install_paths(name):
    """
    Return the (distutils) install paths for the named dist.

    A dict with ('purelib', 'platlib', 'headers', 'scripts', 'data') keys.
    """
    paths = {}

    i = get_install_command(name)

    for key in install.SCHEME_KEYS:
        paths[key] = getattr(i, 'install_' + key)

    # pip uses a similar path as an alternative to the system's (read-only)
    # include directory:
    if hasattr(sys, 'real_prefix'):  # virtualenv
        paths['headers'] = os.path.join(sys.prefix,
                                        'include',
                                        'site',
                                        'python' + sys.version[:3],
                                        name)

    return paths

def get_install_paths(name):
    """
    Return the (distutils) install paths for the named dist.

    A dict with ('purelib', 'platlib', 'headers', 'scripts', 'data') keys.
    """
    paths = {}

    i = get_install_command(name)

    for key in install.SCHEME_KEYS:
        paths[key] = getattr(i, 'install_' + key)

    # pip uses a similar path as an alternative to the system's (read-only)
    # include directory:
    if hasattr(sys, 'real_prefix'):  # virtualenv
        paths['headers'] = os.path.join(sys.prefix,
                                        'include',
                                        'site',
                                        'python' + sys.version[:3],
                                        name)

    return paths

def get_install_paths(name):
    """
    Return the (distutils) install paths for the named dist.

    A dict with ('purelib', 'platlib', 'headers', 'scripts', 'data') keys.
    """
    paths = {}

    i = get_install_command(name)

    for key in install.SCHEME_KEYS:
        paths[key] = getattr(i, 'install_' + key)

    # pip uses a similar path as an alternative to the system's (read-only)
    # include directory:
    if hasattr(sys, 'real_prefix'):  # virtualenv
        paths['headers'] = os.path.join(sys.prefix,
                                        'include',
                                        'site',
                                        'python' + sys.version[:3],
                                        name)

    return paths

def get_install_paths(name):
    """
    Return the (distutils) install paths for the named dist.

    A dict with ('purelib', 'platlib', 'headers', 'scripts', 'data') keys.
    """
    paths = {}

    i = get_install_command(name)

    for key in install.SCHEME_KEYS:
        paths[key] = getattr(i, 'install_' + key)

    # pip uses a similar path as an alternative to the system's (read-only)
    # include directory:
    if hasattr(sys, 'real_prefix'):  # virtualenv
        paths['headers'] = os.path.join(sys.prefix,
                                        'include',
                                        'site',
                                        'python' + sys.version[:3],
                                        name)

    return paths

def get_install_paths(name):
    """
    Return the (distutils) install paths for the named dist.

    A dict with ('purelib', 'platlib', 'headers', 'scripts', 'data') keys.
    """
    paths = {}

    i = get_install_command(name)

    for key in install.SCHEME_KEYS:
        paths[key] = getattr(i, 'install_' + key)

    # pip uses a similar path as an alternative to the system's (read-only)
    # include directory:
    if hasattr(sys, 'real_prefix'):  # virtualenv
        paths['headers'] = os.path.join(sys.prefix,
                                        'include',
                                        'site',
                                        'python' + sys.version[:3],
                                        name)

    return paths

def get_install_paths(name):
    """
    Return the (distutils) install paths for the named dist.

    A dict with ('purelib', 'platlib', 'headers', 'scripts', 'data') keys.
    """
    paths = {}

    i = get_install_command(name)

    for key in install.SCHEME_KEYS:
        paths[key] = getattr(i, 'install_' + key)

    # pip uses a similar path as an alternative to the system's (read-only)
    # include directory:
    if hasattr(sys, 'real_prefix'):  # virtualenv
        paths['headers'] = os.path.join(sys.prefix,
                                        'include',
                                        'site',
                                        'python' + sys.version[:3],
                                        name)

    return paths

def get_install_paths(name):
    """
    Return the (distutils) install paths for the named dist.

    A dict with ('purelib', 'platlib', 'headers', 'scripts', 'data') keys.
    """
    paths = {}

    i = get_install_command(name)

    for key in install.SCHEME_KEYS:
        paths[key] = getattr(i, 'install_' + key)

    # pip uses a similar path as an alternative to the system's (read-only)
    # include directory:
    if hasattr(sys, 'real_prefix'):  # virtualenv
        paths['headers'] = os.path.join(sys.prefix,
                                        'include',
                                        'site',
                                        'python' + sys.version[:3],
                                        name)

    return paths

def get_install_paths(name):
    """
    Return the (distutils) install paths for the named dist.

    A dict with ('purelib', 'platlib', 'headers', 'scripts', 'data') keys.
    """
    paths = {}

    i = get_install_command(name)

    for key in install.SCHEME_KEYS:
        paths[key] = getattr(i, 'install_' + key)

    # pip uses a similar path as an alternative to the system's (read-only)
    # include directory:
    if hasattr(sys, 'real_prefix'):  # virtualenv
        paths['headers'] = os.path.join(sys.prefix,
                                        'include',
                                        'site',
                                        'python' + sys.version[:3],
                                        name)

    return paths

def get_install_paths(name):
    """
    Return the (distutils) install paths for the named dist.

    A dict with ('purelib', 'platlib', 'headers', 'scripts', 'data') keys.
    """
    paths = {}

    i = get_install_command(name)

    for key in install.SCHEME_KEYS:
        paths[key] = getattr(i, 'install_' + key)

    # pip uses a similar path as an alternative to the system's (read-only)
    # include directory:
    if hasattr(sys, 'real_prefix'):  # virtualenv
        paths['headers'] = os.path.join(sys.prefix,
                                        'include',
                                        'site',
                                        'python' + sys.version[:3],
                                        name)

    return paths

def get_install_command(name):
    # late binding due to potential monkeypatching
    d = dist.Distribution({'name':name})
    i = install.install(d)
    i.finalize_options()
    return i

def initialize_options(self):
        orig.install.initialize_options(self)
        self.old_and_unmanageable = None
        self.single_version_externally_managed = None

def finalize_options(self):
        orig.install.finalize_options(self)
        if self.root:
            self.single_version_externally_managed = True
        elif self.single_version_externally_managed:
            if not self.root and not self.record:
                raise DistutilsArgError(
                    "You must specify --record or --root when building system"
                    " packages"
                )

def handle_extra_path(self):
        if self.root or self.single_version_externally_managed:
            # explicit backward-compatibility mode, allow extra_path to work
            return orig.install.handle_extra_path(self)

        # Ignore extra_path when installing an egg (or being run by another
        # command without --root or --single-version-externally-managed
        self.path_file = None
        self.extra_dirs = ''

def do_egg_install(self):

        easy_install = self.distribution.get_command_class('easy_install')

        cmd = easy_install(
            self.distribution, args="x", root=self.root, record=self.record,
        )
        cmd.ensure_finalized()  # finalize before bdist_egg munges install cmd
        cmd.always_copy_from = '.'  # make sure local-dir eggs get installed

        # pick up setup-dir .egg files only: no .egg-info
        cmd.package_index.scan(glob.glob('*.egg'))

        self.run_command('bdist_egg')
        args = [self.distribution.get_command_obj('bdist_egg').egg_output]

        if setuptools.bootstrap_install_from:
            # Bootstrap self-installation of setuptools
            args.insert(0, setuptools.bootstrap_install_from)

        cmd.args = args
        cmd.run()
        setuptools.bootstrap_install_from = None


# XXX Python 3.1 doesn't see _nc if this is inside the class

def get_install_command(name):
    # late binding due to potential monkeypatching
    d = dist.Distribution({'name': name})
    i = install.install(d)
    i.finalize_options()
    return i

def initialize_options(self):
        orig.install.initialize_options(self)
        self.old_and_unmanageable = None
        self.single_version_externally_managed = None

def finalize_options(self):
        orig.install.finalize_options(self)
        if self.root:
            self.single_version_externally_managed = True
        elif self.single_version_externally_managed:
            if not self.root and not self.record:
                raise DistutilsArgError(
                    "You must specify --record or --root when building system"
                    " packages"
                )

def handle_extra_path(self):
        if self.root or self.single_version_externally_managed:
            # explicit backward-compatibility mode, allow extra_path to work
            return orig.install.handle_extra_path(self)

        # Ignore extra_path when installing an egg (or being run by another
        # command without --root or --single-version-externally-managed
        self.path_file = None
        self.extra_dirs = ''

def do_egg_install(self):

        easy_install = self.distribution.get_command_class('easy_install')

        cmd = easy_install(
            self.distribution, args="x", root=self.root, record=self.record,
        )
        cmd.ensure_finalized()  # finalize before bdist_egg munges install cmd
        cmd.always_copy_from = '.'  # make sure local-dir eggs get installed

        # pick up setup-dir .egg files only: no .egg-info
        cmd.package_index.scan(glob.glob('*.egg'))

        self.run_command('bdist_egg')
        args = [self.distribution.get_command_obj('bdist_egg').egg_output]

        if setuptools.bootstrap_install_from:
            # Bootstrap self-installation of setuptools
            args.insert(0, setuptools.bootstrap_install_from)

        cmd.args = args
        cmd.run()
        setuptools.bootstrap_install_from = None


# XXX Python 3.1 doesn't see _nc if this is inside the class

def run(self):
        global path, version, initVersion, forcedVersion, installVersion

        name = self.config_vars['dist_name']
        print(name)
        path = os.path.join(self.install_libbase, 'NeoAnalysis')
        if os.path.exists(path):
            raise Exception("It appears another version of %s is already "
                            "installed at %s; remove this before installing." 
                            % (name, path))
        print("Installing to %s" % path)
        rval = install.install.run(self)


        # If the version in __init__ is different from the automatically-generated
        # version string, then we will update __init__ in the install directory
        if initVersion == version:
            return rval

        try:
            initfile = os.path.join(path, '__init__.py')
            data = open(initfile, 'r').read()
            open(initfile, 'w').write(re.sub(r"__version__ = .*", "__version__ = '%s'" % version, data))
            installVersion = version
        except:
            sys.stderr.write("Warning: Error occurred while setting version string in build path. "
                             "Installation will use the original version string "
                             "%s instead.\n" % (initVersion)
                             )
            if forcedVersion:
                raise
            installVersion = initVersion
            sys.excepthook(*sys.exc_info())

        return rval

def run(self):
        global path, version, initVersion, forcedVersion, installVersion

        name = self.config_vars['dist_name']
        print(name)
        path = os.path.join(self.install_libbase, 'NeoAnalysis')
        if os.path.exists(path):
            raise Exception("It appears another version of %s is already "
                            "installed at %s; remove this before installing." 
                            % (name, path))
        print("Installing to %s" % path)
        rval = install.install.run(self)


        # If the version in __init__ is different from the automatically-generated
        # version string, then we will update __init__ in the install directory
        if initVersion == version:
            return rval

        try:
            initfile = os.path.join(path, '__init__.py')
            data = open(initfile, 'r').read()
            open(initfile, 'w').write(re.sub(r"__version__ = .*", "__version__ = '%s'" % version, data))
            installVersion = version
        except:
            sys.stderr.write("Warning: Error occurred while setting version string in build path. "
                             "Installation will use the original version string "
                             "%s instead.\n" % (initVersion)
                             )
            if forcedVersion:
                raise
            installVersion = initVersion
            sys.excepthook(*sys.exc_info())

        return rval

def distutils_scheme(dist_name, user=False, home=None, root=None):
    """
    Return a distutils install scheme
    """
    from distutils.dist import Distribution

    scheme = {}
    d = Distribution({'name': dist_name})
    d.parse_config_files()
    i = d.get_command_obj('install', create=True)
    # NOTE: setting user or home has the side-effect of creating the home dir or
    # user base for installations during finalize_options()
    # ideally, we'd prefer a scheme class that has no side-effects.
    i.user = user or i.user
    i.home = home or i.home
    i.root = root or i.root
    i.finalize_options()
    for key in SCHEME_KEYS:
        scheme[key] = getattr(i, 'install_'+key)

    if running_under_virtualenv():
        scheme['headers'] = os.path.join(sys.prefix,
                                    'include',
                                    'site',
                                    'python' + sys.version[:3],
                                    dist_name)

        if root is not None:
            scheme["headers"] = os.path.join(
                root,
                os.path.abspath(scheme["headers"])[1:],
            )

    return scheme

def get_install_command(name):
    # late binding due to potential monkeypatching
    d = dist.Distribution({'name':name})
    i = install.install(d)
    i.finalize_options()
    return i

def initialize_options(self):
        orig.install.initialize_options(self)
        self.old_and_unmanageable = None
        self.single_version_externally_managed = None

def finalize_options(self):
        orig.install.finalize_options(self)
        if self.root:
            self.single_version_externally_managed = True
        elif self.single_version_externally_managed:
            if not self.root and not self.record:
                raise DistutilsArgError(
                    "You must specify --record or --root when building system"
                    " packages"
                )

def handle_extra_path(self):
        if self.root or self.single_version_externally_managed:
            # explicit backward-compatibility mode, allow extra_path to work
            return orig.install.handle_extra_path(self)

        # Ignore extra_path when installing an egg (or being run by another
        # command without --root or --single-version-externally-managed
        self.path_file = None
        self.extra_dirs = ''

def do_egg_install(self):

        easy_install = self.distribution.get_command_class('easy_install')

        cmd = easy_install(
            self.distribution, args="x", root=self.root, record=self.record,
        )
        cmd.ensure_finalized()  # finalize before bdist_egg munges install cmd
        cmd.always_copy_from = '.'  # make sure local-dir eggs get installed

        # pick up setup-dir .egg files only: no .egg-info
        cmd.package_index.scan(glob.glob('*.egg'))

        self.run_command('bdist_egg')
        args = [self.distribution.get_command_obj('bdist_egg').egg_output]

        if setuptools.bootstrap_install_from:
            # Bootstrap self-installation of setuptools
            args.insert(0, setuptools.bootstrap_install_from)

        cmd.args = args
        cmd.run()
        setuptools.bootstrap_install_from = None


# XXX Python 3.1 doesn't see _nc if this is inside the class

def get_install_command(name):
    # late binding due to potential monkeypatching
    d = dist.Distribution({'name':name})
    i = install.install(d)
    i.finalize_options()
    return i