capybara/virtualenv/lib/python2.7/site-packages/pip/locations.py
def distutils_scheme(dist_name, user=False, home=None, root=None,
                     isolated=False):
    """
    Return a distutils install scheme
    """
    from distutils.dist import Distribution

    scheme = {}

    if isolated:
        extra_dist_args = {"script_args": ["--no-user-cfg"]}
    else:
        extra_dist_args = {}
    dist_args = {'name': dist_name}
    dist_args.update(extra_dist_args)

    d = Distribution(dist_args)
    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 i.install_lib is not None:
        # install_lib takes precedence over purelib and platlib
        scheme.update(dict(purelib=i.install_lib, platlib=i.install_lib))

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

    scheme = {}

    if isolated:
        extra_dist_args = {"script_args": ["--no-user-cfg"]}
    else:
        extra_dist_args = {}
    dist_args = {'name': dist_name}
    dist_args.update(extra_dist_args)

    d = Distribution(dist_args)
    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 i.install_lib is not None:
        # install_lib takes precedence over purelib and platlib
        scheme.update(dict(purelib=i.install_lib, platlib=i.install_lib))

    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
Return a distutils install scheme