# Copyright 2013-2019 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 six.moves import builtins

from spack import *


class Raiser(Package):
    """A package that can raise a built-in exception
    of any kind with any message
    """

    homepage = "http://www.example.com"
    url = "http://www.example.com/a-1.0.tar.gz"

    version('1.0', '0123456789abcdef0123456789abcdef')
    version('2.0', '2.0_a_hash')

    variant(
        'exc_type',
        values=lambda x: isinstance(x, str),
        default='RuntimeError',
        description='type of the exception to be raised',
        multi=False
    )

    variant(
        'msg',
        values=lambda x: isinstance(x, str),
        default='Unknown Exception',
        description='message that will be tied to the exception',
        multi=False
    )

    def install(self, spec, prefix):
        print('Raiser will raise ')
        exc_typename = self.spec.variants['exc_type'].value
        exc_type = getattr(builtins, exc_typename)
        msg = self.spec.variants['msg'].value
        raise exc_type(msg)
