# Copyright 2013-2020 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 import *


class Pnmpi(CMakePackage):
    """PnMPI is a dynamic MPI tool infrastructure that builds on top of
       the standardized PMPI interface. """

    homepage = "https://github.com/LLNL/PnMPI"
    url      = "https://github.com/LLNL/PnMPI/releases/download/v1.7/PnMPI-v1.7-full.tar.gz"

    version('1.7', sha256='523228bdc220ae417d6812c0766bba698a240d71c69981cb0cb2b09a75ef4a9e')

    variant('fortran', default=False,
            description='Configure PnMPI with Fortran support')
    variant('tests', default=False,
            description='Build test cases and enable "test" makefile target')

    depends_on('cmake', type='build')
    depends_on('argp-standalone', when='platform=darwin')
    depends_on('binutils')
    depends_on('help2man')
    depends_on('doxygen')
    depends_on('mpi')

    @run_before('cmake')
    def check_fortran(self):
        is_no_fortran_compiler = not self.compiler.f77 and not self.compiler.fc
        if self.spec.satisfies('+fortran'):
            if is_no_fortran_compiler:
                raise InstallError('pnmpi+fortran requires Fortran compiler '
                                   'but no Fortran compiler found!')

    def cmake_args(self):
        args = []
        spec = self.spec
        on_off = {True: 'ON', False: 'OFF'}

        has_fortran = spec.satisfies('+fortran')
        has_tests = spec.satisfies('+tests')

        args.append('-DENABLE_FORTRAN:BOOL={0}'.format(on_off[has_fortran]))
        args.append('-DENABLE_TESTING:BOOL={0}'.format(on_off[has_tests]))
        return args