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# Copyright 2013-2021 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)

import os.path
import sys


class Mvapich2x(AutotoolsPackage):
    """MVAPICH2-X is the advanced version of the MVAPICH2 MPI library with
    enhanced features (UMR, ODP, DC, Core-Direct, SHARP, XPMEM), OSU INAM
    (InifniBand Network Monitoring and Analysis),PGAS (OpenSHMEM, UPC, UPC++,
    and CAF), and MPI+PGAS programming models with unified communication
    runtime. MVAPICH2-X is not installable from source and is only available
    through a binary mirror. If you do not find the binary you're looking for,
    send us an email at mvapich@cse.ohio-state.edu. The binary mirror url is:
    http://mvapich.cse.ohio-state.edu/download/mvapich/spack-mirror/mvapich2x/
    """

    homepage = "http://mvapich.cse.ohio-state.edu"
    url      = "http://mvapich.cse.ohio-state.edu/download/mvapich/spack-mirror/mvapich2x/mvapich2x-2.3.tar.gz"

    maintainers = ['nithintsk', 'harisubramoni']

    version('2.3', sha256='fc47070e2e9fac09b97022be2320200d732a0a4a820a2b51532b88f8ded14536', preferred=True)
    version('2.3rc3', sha256='85a9f1ea1a837d487e356f021ef6f3a4661ad270a0c5f54777b362ee4d45166f')

    provides('mpi')
    provides('mpi@:3.1')

    variant(
        'feature',
        description=('Feature descriptions are specified at: '
                     'https://mvapich.cse.ohio-state.edu/downloads/'),
        default='basic',
        values=('basic', 'basic-xpmem', 'advanced', 'advanced-xpmem'),
        multi=False
    )

    variant(
        'process_managers',
        description='List of the process managers to activate',
        default='mpirun',
        values=('slurm', 'mpirun', 'pbs', 'jsrun'),
        multi=False
    )

    variant(
        'distribution',
        description='The type of distribution of the fabric.',
        default='stock-ofed',
        values=('stock-ofed', 'mofed4.5', 'mofed4.6', 'mofed4.7', 'mofed5.0',
                'ifs10.6', 'ifs10.9'),
        multi=False
    )

    variant(
        'pmi_version',
        description=('The pmi version to be used with slurm. This variant is '
                     'IGNORED if set for mpirun or jsrun. jsrun uses pmix '
                     'regardless of chosen option.'),
        default='pmi1',
        values=('pmi1', 'pmi2', 'pmix'),
        multi=False
    )

    depends_on('bison@3.4.2', type='build')
    depends_on('libpciaccess@0.13.5', when=(sys.platform != 'darwin'))
    depends_on('libxml2@2.9.10')
    depends_on('pmix@3.1.3', when='pmi_version=pmix')

    filter_compiler_wrappers(
        'mpicc', 'mpicxx', 'mpif77', 'mpif90', 'mpifort', relative_root='bin'
    )

    @property
    def libs(self):
        query_parameters = self.spec.last_query.extra_parameters
        libraries = ['libmpi']

        if 'cxx' in query_parameters:
            libraries = ['libmpicxx'] + libraries

        return find_libraries(
            libraries, root=self.prefix, shared=True, recursive=True
        )

    @property
    def process_feature_options(self):
        spec = self.spec
        opts = []

        if 'feature=basic' in spec:
            opts = ['--enable-mcast', '--enable-hybrid', '--enable-mpit-tool',
                    '--enable-mpit-pvars=mv2']
        elif 'feature=basic-xpmem' in spec:
            opts = ['--enable-mcast', '--enable-hybrid', '--enable-mpit-tool',
                    '--enable-mpit-pvars=mv2', '--with-xpmem=/opt/xpmem/']
        elif 'feature=advanced' in spec:
            opts = ['--enable-mcast', '--enable-hybrid', '--enable-mpit-tool',
                    '--enable-mpit-pvars=mv2', '--with-core-direct',
                    '--enable-dc', '--enable-umr']
        elif 'feature=advanced-xpmem' in spec:
            opts = ['--enable-mcast', '--enable-hybrid', '--enable-mpit-tool',
                    '--enable-mpit-pvars=mv2', '--with-core-direct',
                    '--enable-dc', '--enable-umr', '--with-xpmem=/opt/xpmem/']
        return opts

    @property
    def distribution_options(self):
        opts = []
        if ('distribution=ifs10.6' in self.spec or
            'distribution=ifs10.9' in self.spec):
            opts = ["--with-device=ch3:psm"]
        else:
            opts = ["--with-device=ch3:mrail", "--with-rdma=gen2"]
        return opts

    @property
    def process_manager_options(self):
        spec = self.spec
        opts = []
        # See: http://slurm.schedmd.com/mpi_guide.html#mvapich2
        if 'process_managers=slurm' in spec:
            opts = [
                '--with-ch3-rank-bits=32',
                '--with-pm=slurm'
            ]
            if 'pmi_version=pmi1' in spec:
                opts.append('--with-pmi=pmi1')
            if 'pmi_version=pmi2' in spec:
                opts.append('--with-pmi=pmi2')
            if 'pmi_version=pmix' in spec:
                opts.append('--with-pmi=pmix')
                opts.append('--with-pmix={0}'.format(spec['pmix'].prefix))
        elif 'process_managers=pbs' in spec:
            opts = ['--with-ch3-rank-bits=32', '--with-pbs=/opt/pbs',
                    '--with-pm=hydra']
        elif 'process_managers=jsrun' in spec:
            opts = ['--with-ch3-rank-bits=32', '--with-pmi=pmix',
                    '--with-pmix={0}'.format(['pmix'].prefix),
                    '--with-pm=jsm']
        opts.append('--disable-gl')
        return opts

    @property
    def construct_ldflags(self):
        # LDFLAGS contributed by the process manager
        spec = self.spec
        xpmem_ldflags = ''
        if ('feature=basic-xpmem' in spec or 'feature=advanced-xpmem' in spec):
            xpmem_ldflags = (' -Wl,-rpath,/opt/xpmem/lib '
                             '-L/opt/xpmem/lib -lxpmem')

        # Add default LDFLAGS and combine together
        LDFLAGS = 'LDFLAGS=-Wl,-rpath,XORIGIN/placeholder'
        LDFLAGS = LDFLAGS + xpmem_ldflags
        return LDFLAGS

    @property
    def construct_cflags(self):
        # CFLAGS contributed by the feature
        spec = self.spec
        cflags = 'CFLAGS='
        if ('feature=basic-xpmem' in spec or 'feature=advanced-xpmem' in spec):
            cflags = cflags + '-I/opt/xpmem/include'
        return cflags

    def setup_build_environment(self, env):
        # mvapich2 configure fails when F90 and F90FLAGS are set
        env.unset('F90')
        env.unset('F90FLAGS')

    def setup_run_environment(self, env):
        if 'pmi_version=pmi1' in self.spec:
            env.set('SLURM_MPI_TYPE', 'pmi1')
        if 'pmi_version=pmi2' in self.spec:
            env.set('SLURM_MPI_TYPE', 'pmi2')
        if 'pmi_version=pmix' in self.spec:
            env.set('SLURM_MPI_TYPE', 'pmix')

        # Because MPI functions as a compiler, we need to treat it as one and
        # add its compiler paths to the run environment.
        self.setup_compiler_environment(env)

    def setup_dependent_build_environment(self, env, dependent_spec):
        self.setup_compiler_environment(env)

        # use the Spack compiler wrappers under MPI
        env.set('MPICH_CC', spack_cc)
        env.set('MPICH_CXX', spack_cxx)
        env.set('MPICH_F77', spack_f77)
        env.set('MPICH_F90', spack_fc)
        env.set('MPICH_FC', spack_fc)

    def setup_compiler_environment(self, env):
        # For Cray MPIs, the regular compiler wrappers *are* the MPI wrappers.
        # Cray MPIs always have cray in the module name, e.g. "cray-mvapich"
        env.set('MPICC',  join_path(self.prefix.bin, 'mpicc'))
        env.set('MPICXX', join_path(self.prefix.bin, 'mpicxx'))
        env.set('MPIF77', join_path(self.prefix.bin, 'mpif77'))
        env.set('MPIF90', join_path(self.prefix.bin, 'mpif90'))

    def setup_dependent_package(self, module, dependent_spec):
        self.spec.mpicc  = join_path(self.prefix.bin, 'mpicc')
        self.spec.mpicxx = join_path(self.prefix.bin, 'mpicxx')
        self.spec.mpifc  = join_path(self.prefix.bin, 'mpif90')
        self.spec.mpif77 = join_path(self.prefix.bin, 'mpif77')
        self.spec.mpicxx_shared_libs = [
            os.path.join(self.prefix.lib, 'libmpicxx.{0}'.format(dso_suffix)),
            os.path.join(self.prefix.lib, 'libmpi.{0}'.format(dso_suffix))
        ]

    def configure_args(self):
        args = [
            '--enable-ucr',
            '--disable-static',
            '--enable-shared',
            '--disable-rdma-cm',
            '--without-hydra-ckpointlib'
        ]
        args.extend(self.process_manager_options)
        args.extend(self.distribution_options)
        args.append(self.construct_cflags)
        args.append(self.construct_ldflags)
        return args