##############################################################################
# Copyright (c) 2013-2017, Lawrence Livermore National Security, LLC.
# Produced at the Lawrence Livermore National Laboratory.
#
# This file is part of Spack.
# Created by Todd Gamblin, tgamblin@llnl.gov, All rights reserved.
# LLNL-CODE-647188
#
# For details, see https://github.com/llnl/spack
# Please also see the NOTICE and LICENSE files for our notice and the LGPL.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License (as
# published by the Free Software Foundation) version 2.1, February 1999.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the IMPLIED WARRANTY OF
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the terms and
# conditions of the GNU Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
##############################################################################
from spack import *
import os


def check(condition, msg):
    """Raise an install error if condition is False."""
    if not condition:
        raise InstallError(msg)


class Cmake(Package):
    """A dumy package for the cmake build system."""
    homepage  = 'https://www.cmake.org'
    url       = 'https://cmake.org/files/v3.4/cmake-3.4.3.tar.gz'

    version('3.4.3',    '4cb3ff35b2472aae70f542116d616e63',
            url='https://cmake.org/files/v3.4/cmake-3.4.3.tar.gz')

    def setup_environment(self, spack_env, run_env):
        spack_cc    # Ensure spack module-scope variable is avaiable
        spack_env.set('for_install', 'for_install')

    def setup_dependent_environment(self, spack_env, run_env, dspec):
        spack_cc    # Ensure spack module-scope variable is avaiable
        spack_env.set('from_cmake', 'from_cmake')

    def setup_dependent_package(self, module, dspec):
        spack_cc    # Ensure spack module-scope variable is avaiable

        self.spec.from_cmake = "from_cmake"
        module.from_cmake = "from_cmake"

        self.spec.link_arg = "test link arg"

    def install(self, spec, prefix):
        mkdirp(prefix.bin)

        check(os.environ['for_install'] == 'for_install',
              "Couldn't read env var set in compile envieonmnt")

        cmake_exe = join_path(prefix.bin, 'cmake')
        touch(cmake_exe)
        set_executable(cmake_exe)
