# Copyright 2013-2023 Lawrence Livermore National Security, LLC and other
# Spack Project Developers. See the top-level COPYRIGHT file for details.
#
# SPDX-License-Identifier: (Apache-2.0 OR MIT)

from spack.package import *


class PyTatsu(PythonPackage):
    """TatSu (the successor to Grako) is a tool that takes grammars in
    a variation of EBNF as input, and outputs memoizing (Packrat) PEG
    parsers in Python."""

    homepage = "https://github.com/neogeny/tatsu"
    pypi = "TatSu/TatSu-4.4.0.zip"

    license("BSD-2-Clause")

    version("4.4.0", sha256="80713413473a009f2081148d0f494884cabaf9d6866b71f2a68a92b6442f343d")

    variant("future_regex", default=True, description="Use regex implementation")

    depends_on("python@3.6:", type=("build", "run"), when="@4.5:")
    depends_on("py-setuptools", type="build")
    # optional dependency, otherwise falls back to standard implementation
    depends_on("py-regex@2018.8:", type=("build", "run"), when="+future_regex")