locations.py 文件源码

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