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# 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 Flibcpp(CMakePackage):
    """Fortran bindings to the C++ Standard Library.
    """

    homepage = "https://flibcpp.readthedocs.io/en/latest"
    git = "https://github.com/swig-fortran/flibcpp.git"
    url = "https://github.com/swig-fortran/flibcpp/archive/v1.0.1.tar.gz"

    version('1.0.1', sha256='8569c71eab0257097a6aa666a6d86bdcb6cd6e31244d32cc5b2478d0e936ca7a')
    version('0.5.2', sha256='b9b4eb6431d5b56a54c37f658df7455eafd3d204a5534903b127e0c8a1c9b827')
    version('0.5.1', sha256='76db24ce7893f19ab97ea7260c39490ae1bd1e08a4cc5111ad7e70525a916993')
    version('0.5.0', sha256='94204198304ba4187815431859e5958479fa651a6f06f460b099badbf50f16b2')
    version('0.4.1', sha256='5c9a11af391fcfc95dd11b95338cff19ed8104df66d42b00ae54f6cde4da5bdf')
    version('0.4.0', sha256='ccb0acf58a4480977fdb3c62a0bd267297c1dfa687a142ea8822474c38aa322b')
    version('0.3.1', sha256='871570124122c18018478275d5040b4b787d1966e50ee95b634b0b5e0cd27e91')

    variant('doc', default=False, description='Build and install documentation')
    variant('shared', default=True, description='Build shared libraries')
    variant('swig', default=False,
            description='Regenerate source files using SWIG')
    variant('fstd', default='03', values=('none', '03', '08', '15', '18'),
            multi=False, description='Build with this Fortran standard')

    depends_on('swig@4.0.2-fortran', type='build', when="+swig")
    depends_on('py-sphinx', type='build', when="+doc")

    @run_before('cmake')
    def die_without_fortran(self):
        # Until we can pass compiler requirements through virtual
        # dependencies, explicitly check for Fortran compiler instead of
        # waiting for configure error.
        if (self.compiler.f77 is None) or (self.compiler.fc is None):
            raise InstallError('Flibcpp requires a Fortran compiler')

    def cmake_args(self):
        from_variant = self.define_from_variant
        fstd_key = ('FLIBCPP_Fortran_STANDARD' if self.version > Version('1.0.0')
                    else 'FLIBCPP_FORTRAN_STD')
        return [
            from_variant('BUILD_SHARED_LIBS', 'shared'),
            from_variant('FLIBCPP_BUILD_DOCS', 'doc'),
            from_variant(fstd_key, 'fstd'),
            from_variant('FLIBCPP_USE_SWIG', 'swig'),
            self.define('FLIBCPP_BUILD_TESTS', bool(self.run_tests)),
            self.define('FLIBCPP_BUILD_EXAMPLES', bool(self.run_tests)),
        ]

    examples_src_dir = 'example'

    @run_after('install')
    def setup_smoke_tests(self):
        """Copy the example source files after the package is installed to an
        install test subdirectory for use during `spack test run`."""
        self.cache_extra_test_sources([self.examples_src_dir])

    @property
    def cached_tests_work_dir(self):
        """The working directory for cached test sources."""
        return join_path(self.test_suite.current_test_cache_dir,
                         self.examples_src_dir)

    def test(self):
        """Perform stand-alone/smoke tests."""
        cmake_args = [
            self.define('CMAKE_PREFIX_PATH', self.prefix),
            self.define('CMAKE_Fortran_COMPILER', self.compiler.fc),
        ]
        cmake_args.append(self.cached_tests_work_dir)

        self.run_test("cmake", cmake_args,
                      purpose="test: calling cmake",
                      work_dir=self.cached_tests_work_dir)

        self.run_test("make", [],
                      purpose="test: building the tests",
                      work_dir=self.cached_tests_work_dir)

        self.run_test("run-examples.sh", [],
                      purpose="test: running the examples",
                      work_dir=self.cached_tests_work_dir)