llvm/utils/gn/secondary/llvm/utils/llvm-lit/lit_path_function.gni

lit_path_function =
    "# Takes a path that's relative to __file__ and makes it absolute.\n" +
    "def path(p):\n" +
    "    return os.path.abspath(os.path.join(__file__, '..', p)) if p else ''"