Function determine_setup

src/_pytest/config/findpaths.py:170–213

(
    inifile: Optional[str],
    args: Sequence[str],
    rootdir_cmd_arg: Optional[str] = None,
    config: Optional["Config"] = None,
)

def determine_setup(
    inifile: Optional[str],
    args: Sequence[str],
    rootdir_cmd_arg: Optional[str] = None,
    config: Optional["Config"] = None,
) -> Tuple[Path, Optional[Path], Dict[str, Union[str, List[str]]]]:
    rootdir = None
    dirs = get_dirs_from_args(args)
    if inifile:
        inipath_ = absolutepath(inifile)
        inipath: Optional[Path] = inipath_
        inicfg = load_config_dict_from_file(inipath_) or {}
        if rootdir_cmd_arg is None:
            rootdir = inipath_.parent
    else:
        ancestor = get_common_ancestor(dirs)
        rootdir, inipath, inicfg = locate_config([ancestor])
        if rootdir is None and rootdir_cmd_arg is None:
            for possible_rootdir in (ancestor, *ancestor.parents):
                if (possible_rootdir / "setup.py").is_file():
                    rootdir = possible_rootdir
                    break
            else:
                if dirs != [ancestor]:
                    rootdir, inipath, inicfg = locate_config(dirs)
                if rootdir is None:
                    if config is not None:
                        cwd = config.invocation_params.dir
                    else:
                        cwd = Path.cwd()
                    rootdir = get_common_ancestor([cwd, ancestor])
                    is_fs_root = os.path.splitdrive(str(rootdir))[1] == "/"
                    if is_fs_root:
                        rootdir = ancestor
    if rootdir_cmd_arg:
        rootdir = absolutepath(os.path.expandvars(rootdir_cmd_arg))
        if not rootdir.is_dir():
            raise UsageError(
                "Directory '{}' not found. Check your '--rootdir' option.".format(
                    rootdir
                )
            )
    assert rootdir is not None
    return rootdir, inipath, inicfg or {}