def get_path_from_node()

in src/buildstream/_project.py [0:0]

• 59 lines of code
• 15 McCabe index (conditional complexity)

    def get_path_from_node(self, node, *, check_is_file=False, check_is_dir=False):
        path_str = node.as_str()
        path = Path(path_str)
        full_path = self._absolute_directory_path / path

        if full_path.is_symlink():
            provenance = node.get_provenance()
            raise LoadError(
                "{}: Specified path '{}' must not point to " "symbolic links ".format(provenance, path_str),
                LoadErrorReason.PROJ_PATH_INVALID_KIND,
            )

        if path.parts and path.parts[0] == "..":
            provenance = node.get_provenance()
            raise LoadError(
                "{}: Specified path '{}' first component must " "not be '..'".format(provenance, path_str),
                LoadErrorReason.PROJ_PATH_INVALID,
            )

        try:
            full_resolved_path = full_path.resolve(strict=True)
        except FileNotFoundError:
            provenance = node.get_provenance()
            raise LoadError(
                "{}: Specified path '{}' does not exist".format(provenance, path_str), LoadErrorReason.MISSING_FILE
            )

        is_inside = self._absolute_directory_path in full_resolved_path.parents or (
            full_resolved_path == self._absolute_directory_path
        )

        if not is_inside:
            provenance = node.get_provenance()
            raise LoadError(
                "{}: Specified path '{}' must not lead outside of the "
                "project directory".format(provenance, path_str),
                LoadErrorReason.PROJ_PATH_INVALID,
            )

        if path.is_absolute():
            provenance = node.get_provenance()
            raise LoadError(
                "{}: Absolute path: '{}' invalid.\n"
                "Please specify a path relative to the project's root.".format(provenance, path),
                LoadErrorReason.PROJ_PATH_INVALID,
            )

        if full_resolved_path.is_socket() or (full_resolved_path.is_fifo() or full_resolved_path.is_block_device()):
            provenance = node.get_provenance()
            raise LoadError(
                "{}: Specified path '{}' points to an unsupported " "file kind".format(provenance, path_str),
                LoadErrorReason.PROJ_PATH_INVALID_KIND,
            )

        if check_is_file and not full_resolved_path.is_file():
            provenance = node.get_provenance()
            raise LoadError(
                "{}: Specified path '{}' is not a regular file".format(provenance, path_str),
                LoadErrorReason.PROJ_PATH_INVALID_KIND,
            )

        if check_is_dir and not full_resolved_path.is_dir():
            provenance = node.get_provenance()
            raise LoadError(
                "{}: Specified path '{}' is not a directory".format(provenance, path_str),
                LoadErrorReason.PROJ_PATH_INVALID_KIND,
            )

        return path_str