# 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 Libsharp(AutotoolsPackage):
    """Libsharp is a code library for spherical harmonic transforms (SHTs) and
    spin-weighted spherical harmonic transforms, which evolved from the libpsht
    library."""

    variant('openmp', default=True, description='Build with openmp support')
    variant('mpi', default=True, description='Build with MPI support')
    variant('pic', default=True, description='Generate position-independent code (PIC)')

    homepage = "https://github.com/Libsharp/libsharp"
    git      = "https://github.com/Libsharp/libsharp.git"

    version('1.0.0', commit='cc4753ff4b0ef393f0d4ada41a175c6d1dd85d71', preferred=True)
    version('2018-01-17', commit='593d4eba67d61827191c32fb94bf235cb31205e1')

    depends_on('autoconf', type='build')
    depends_on('mpi', when='+mpi')

    patch('arm.patch', when='@2018-01-17 target=aarch64:')
    patch('1.0.0-arm.patch', when='@1.0.0 target=aarch64:')

    def autoreconf(self, spec, prefix):
        """Generate autotools configuration"""
        bash = which('bash')
        bash('autoconf')

    def configure_args(self):
        args = []
        if '+openmp' not in self.spec:
            args.append("--disable-openmp")
        if '+mpi' not in self.spec:
            args.append("--disable-mpi")
        if '+pic' in self.spec:
            args.append("--enable-pic")
        return args

    def install(self, spec, prefix):
        # Libsharp's only caller healpix include headers like 'libsharp/xxx.h'
        # Install xxx.h to include/libsharp
        install_tree('auto/include', prefix.include.libsharp)
        install_tree('auto/lib', prefix.lib)