File: util.py

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from mypy.nodes import CallExpr, Expression, NameExpr, OpExpr, RefExpr, Var


def is_pathlike(expr: Expression) -> bool:
    # TODO: just check that the expression is of type `Path` once we actually
    # get proper type checking
    match expr:
        case CallExpr(callee=RefExpr(fullname="pathlib.Path")):
            return True

        case NameExpr(node=Var(type=ty)) if str(ty) == "pathlib.Path":
            return True

        case OpExpr(left=left, op="/") if is_pathlike(left):
            return True

    return False