# Copyright 2013-2022 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 Scs(MakefilePackage):
    """A C package that solves convex cone problems via operator splitting"""

    homepage = "https://github.com/cvxgrp/scs"
    url      = "https://github.com/cvxgrp/scs/archive/2.1.1.tar.gz"

    version('2.1.1', sha256='0e20b91e8caf744b84aa985ba4e98cc7235ee33612b2bad2bf31ea5ad4e07d93')

    variant('cuda', default=False, description='Build with Cuda support')

    depends_on('blas')
    depends_on('lapack')
    depends_on('cuda', when='+cuda')

    # make sure install_gpu target installs all libs not only the gpu ones
    patch('make_gpu.patch')

    def edit(self, spec, prefix):
        filter_file(r'-lblas', spec['blas'].libs.ld_flags, 'scs.mk')
        filter_file(r'-llapack', spec['lapack'].libs.ld_flags, 'scs.mk')

    def build(self, spec, prefix):
        if '+cuda' in spec:
            make('default', 'gpu')
        else:
            make()

    def install(self, spec, prefix):
        if '+cuda' in spec:
            make('PREFIX=' + prefix, 'install_gpu')
        else:
            make('PREFIX=' + prefix, 'install')